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            null
          ],
          "simple_Rise": 4.836,
          "simple_Twist": 16.942,
          "simple_hRise": 3.421,
          "simple_hTwist": 21.838
        },
        {
          "index": 2,
          "nt1": "///A/33",
          "nt2": "///A/46",
          "bp": "A-U",
          "name": "WC",
          "Saenger": "20-XX",
          "LW": "cWW",
          "DSSR": "cW-W",
          "bp1_params": [
            -0.026,
            0.094,
            0.326,
            -5.585,
            12.394,
            -8.931
          ],
          "step_params": [
            -0.615,
            -0.773,
            4.276,
            2.404,
            -3.167,
            25.344
          ],
          "heli_params": [
            -0.566,
            2.277,
            4.264,
            -7.162,
            -5.437,
            25.649
          ],
          "bp2_params": [
            -0.223,
            -0.266,
            0.216,
            -1.774,
            -8.624,
            -5.932
          ],
          "groove_widths": [
            null,
            null,
            null,
            null
          ],
          "simple_Rise": 4.276,
          "simple_Twist": 26.165,
          "simple_hRise": 4.265,
          "simple_hTwist": 26.460
        },
        {
          "index": 3,
          "nt1": "///A/34",
          "nt2": "///A/45",
          "bp": "G-C",
          "name": "WC",
          "Saenger": "19-XIX",
          "LW": "cWW",
          "DSSR": "cW-W"
        }
      ]
    },
    {
      "index": 4,
      "helix_index": 2,
      "strand1": "CCAG",
      "strand2": "GGUC",
      "bp_type": "||||",
      "helix_form": "AA.",
      "helical_rise": 2.573,
      "helical_rise_std": 0.475,
      "helical_radius": 9.585,
      "helical_radius_std": 1.141,
      "helical_axis": [
        0.958,
        0.147,
        0.246
      ],
      "point1": [
        -37.147,
        4.126,
        -2.315
      ],
      "point2": [
        -29.921,
        5.234,
        -0.456
      ],
      "num_pairs": 4,
      "pairs": [
        {
          "index": 1,
          "nt1": "///A/38",
          "nt2": "///A/58",
          "bp": "C-G",
          "name": "WC",
          "Saenger": "19-XIX",
          "LW": "cWW",
          "DSSR": "cW-W",
          "bp1_params": [
            0.352,
            -0.205,
            -0.215,
            -3.750,
            7.587,
            -2.248
          ],
          "step_params": [
            0.205,
            -1.754,
            3.374,
            2.735,
            6.341,
            23.724
          ],
          "heli_params": [
            -5.970,
            0.328,
            2.822,
            15.022,
            -6.480,
            24.695
          ],
          "bp2_params": [
            -0.593,
            -0.053,
            -0.093,
            8.671,
            -15.511,
            -1.121
          ],
          "groove_widths": [
            null,
            null,
            null,
            null
          ],
          "simple_Rise": 3.374,
          "simple_Twist": 28.843,
          "simple_hRise": 2.937,
          "simple_hTwist": 29.641
        },
        {
          "index": 2,
          "nt1": "///A/39",
          "nt2": "///A/57",
          "bp": "C-G",
          "name": "WC",
          "Saenger": "19-XIX",
          "LW": "cWW",
          "DSSR": "cW-W",
          "bp1_params": [
            -0.593,
            -0.053,
            -0.093,
            8.671,
            -15.511,
            -1.121
          ],
          "step_params": [
            -0.043,
            -1.242,
            3.332,
            -6.240,
            12.569,
            32.581
          ],
          "heli_params": [
            -3.811,
            -0.807,
            2.652,
            21.219,
            10.535,
            35.399
          ],
          "bp2_params": [
            -0.040,
            -0.240,
            0.201,
            3.368,
            -4.091,
            -4.402
          ],
          "groove_widths": [
            null,
            null,
            null,
            null
          ],
          "simple_Rise": 3.332,
          "simple_Twist": 29.502,
          "simple_hRise": 2.562,
          "simple_hTwist": 32.602
        },
        {
          "index": 3,
          "nt1": "///A/40",
          "nt2": "///A/56",
          "bp": "A-U",
          "name": "WC",
          "Saenger": "20-XX",
          "LW": "cWW",
          "DSSR": "cW-W",
          "bp1_params": [
            -0.040,
            -0.240,
            0.201,
            3.368,
            -4.091,
            -4.402
          ],
          "step_params": [
            0.289,
            -2.624,
            3.862,
            5.824,
            -2.195,
            35.669
          ],
          "heli_params": [
            -3.850,
            0.527,
            4.008,
            -3.550,
            -9.420,
            36.191
          ],
          "bp2_params": [
            0.580,
            -0.014,
            -0.195,
            -8.268,
            -9.407,
            -2.616
          ],
          "groove_widths": [
            null,
            null,
            null,
            null
          ],
          "simple_Rise": 3.862,
          "simple_Twist": 32.078,
          "simple_hRise": 4.017,
          "simple_hTwist": 32.661
        },
        {
          "index": 4,
          "nt1": "///A/41",
          "nt2": "///A/55",
          "bp": "G-C",
          "name": "WC",
          "Saenger": "19-XIX",
          "LW": "cWW",
          "DSSR": "cW-W"
        }
      ]
    }
  ],
  "num_isoCanonPairs": 1,
  "isoCanonPairs": [
    {
      "index": -1,
      "helix_index": 1,
      "nt1": "///A/1",
      "nt2": "///A/27",
      "bp": "g-C",
      "name": "WC",
      "Saenger": "19-XIX",
      "LW": "cWW",
      "DSSR": "cW-W"
    }
  ],
  "num_coaxStacks": 2,
  "coaxStacks": [
    {
      "index": 1,
      "helix_index": 1,
      "num_stems": 2,
      "stem_indices": [
        1,
        2
      ]
    },
    {
      "index": 2,
      "helix_index": 2,
      "num_stems": 2,
      "stem_indices": [
        3,
        4
      ]
    }
  ],
  "num_stacks": 11,
  "stacks": [
    {
      "index": 1,
      "num_nts": 2,
      "nts_short": "CU",
      "nts_long": "///A/12,///A/13"
    },
    {
      "index": 2,
      "num_nts": 2,
      "nts_short": "AC",
      "nts_long": "///A/29,///A/30"
    },
    {
      "index": 3,
      "num_nts": 2,
      "nts_short": "AG",
      "nts_long": "///A/31,///A/32"
    },
    {
      "index": 4,
      "num_nts": 3,
      "nts_short": "GAC",
      "nts_long": "///A/10,///A/20,///A/21"
    },
    {
      "index": 5,
      "num_nts": 3,
      "nts_short": "CGG",
      "nts_long": "///A/15,///A/16,///A/17"
    },
    {
      "index": 6,
      "num_nts": 3,
      "nts_short": "GUG",
      "nts_long": "///A/34,///A/42,///A/41"
    },
    {
      "index": 7,
      "num_nts": 3,
      "nts_short": "CAC",
      "nts_long": "///A/45,///A/44,///A/55"
    },
    {
      "index": 8,
      "num_nts": 4,
      "nts_short": "GAAU",
      "nts_long": "///A/9,///A/8,///A/7,///A/22"
    },
    {
      "index": 9,
      "num_nts": 5,
      "nts_short": "gGAAG",
      "nts_long": "///A/1,///A/2,///A/3,///A/4,///A/5"
    },
    {
      "index": 10,
      "num_nts": 5,
      "nts_short": "AAACU",
      "nts_long": "///A/24,///A/25,///A/26,///A/27,///A/28"
    },
    {
      "index": 11,
      "num_nts": 5,
      "nts_short": "GCAAU",
      "nts_long": "///A/37,///A/36,///A/35,///A/52,///A/51"
    }
  ],
  "nonStack": {
    "num_nts": 9,
    "nts_short": "UCCAGAUCU",
    "nts_long": "///A/14,///A/23,///A/43,///A/48,///A/49,///A/50,///A/53,///A/54,///A/59"
  },
  "num_atom2bases": 3,
  "atom2bases": [
    {
      "index": 1,
      "type": "sugar",
      "atom": "///A/15/O4'",
      "nt": "///A/16",
      "vert_dist": 2.606
    },
    {
      "index": 2,
      "type": "sugar",
      "atom": "///A/29/O4'",
      "nt": "///A/28",
      "vert_dist": 3.337
    },
    {
      "index": 3,
      "type": "phosphate",
      "atom": "///A/27/OP1",
      "nt": "///A/29",
      "vert_dist": 3.106
    }
  ],
  "num_hairpins": 3,
  "hairpins": [
    {
      "index": 1,
      "type": "hairpin loop",
      "bridging_nts": [
        4
      ],
      "stem_indices": [
        2
      ],
      "summary": "[1] 4 [A.12 A.17] 3",
      "num_nts": 6,
      "nts_short": "CUUCGG",
      "nts_long": "///A/12,///A/13,///A/14,///A/15,///A/16,///A/17",
      "num_stems": 1,
      "bridges": [
        {
          "index": 1,
          "num_nts": 4,
          "nts_short": "UUCG",
          "nts_long": "///A/13,///A/14,///A/15,///A/16"
        }
      ]
    },
    {
      "index": 2,
      "type": "hairpin loop",
      "bridging_nts": [
        10
      ],
      "stem_indices": [
        3
      ],
      "summary": "[1] 10 [A.34 A.45] 3",
      "num_nts": 12,
      "nts_short": "GACGCCAGUCAC",
      "nts_long": "///A/34,///A/35,///A/36,///A/37,///A/38,///A/39,///A/40,///A/41,///A/42,///A/43,///A/44,///A/45",
      "num_stems": 1,
      "bridges": [
        {
          "index": 1,
          "num_nts": 10,
          "nts_short": "ACGCCAGUCA",
          "nts_long": "///A/35,///A/36,///A/37,///A/38,///A/39,///A/40,///A/41,///A/42,///A/43,///A/44"
        }
      ]
    },
    {
      "index": 3,
      "type": "hairpin loop",
      "bridging_nts": [
        13
      ],
      "stem_indices": [
        4
      ],
      "summary": "[1] 13 [A.41 A.55] 4",
      "num_nts": 15,
      "nts_short": "GUCACUCAGAUAUCC",
      "nts_long": "///A/41,///A/42,///A/43,///A/44,///A/45,///A/46,///A/47,///A/48,///A/49,///A/50,///A/51,///A/52,///A/53,///A/54,///A/55",
      "num_stems": 1,
      "bridges": [
        {
          "index": 1,
          "num_nts": 13,
          "nts_short": "UCACUCAGAUAUC",
          "nts_long": "///A/42,///A/43,///A/44,///A/45,///A/46,///A/47,///A/48,///A/49,///A/50,///A/51,///A/52,///A/53,///A/54"
        }
      ]
    }
  ],
  "num_iloops": 2,
  "iloops": [
    {
      "index": 1,
      "type": "asymmetric internal loop",
      "bridging_nts": [
        3,
        2
      ],
      "stem_indices": [
        1,
        2
      ],
      "summary": "[2] 3 2 [A.6 A.22 A.10 A.19] 2 3",
      "num_nts": 9,
      "nts_short": "AAAGGCACU",
      "nts_long": "///A/6,///A/7,///A/8,///A/9,///A/10,///A/19,///A/20,///A/21,///A/22",
      "num_stems": 2,
      "bridges": [
        {
          "index": 1,
          "num_nts": 3,
          "nts_short": "AAG",
          "nts_long": "///A/7,///A/8,///A/9"
        },
        {
          "index": 2,
          "num_nts": 2,
          "nts_short": "AC",
          "nts_long": "///A/20,///A/21"
        }
      ]
    },
    {
      "index": 2,
      "type": "symmetric internal loop",
      "bridging_nts": [
        3,
        3
      ],
      "stem_indices": [
        -1,
        1
      ],
      "summary": "[2] 3 3 [A.1 A.27 A.5 A.23] 1 2",
      "num_nts": 10,
      "nts_short": "gGAAGCAAAC",
      "nts_long": "///A/1,///A/2,///A/3,///A/4,///A/5,///A/23,///A/24,///A/25,///A/26,///A/27",
      "num_stems": 2,
      "bridges": [
        {
          "index": 1,
          "num_nts": 3,
          "nts_short": "GAA",
          "nts_long": "///A/2,///A/3,///A/4"
        },
        {
          "index": 2,
          "num_nts": 3,
          "nts_short": "AAA",
          "nts_long": "///A/24,///A/25,///A/26"
        }
      ]
    }
  ],
  "num_ssSegments": 2,
  "ssSegments": [
    {
      "index": 1,
      "num_nts": 4,
      "nts_short": "UACA",
      "nts_long": "///A/28,///A/29,///A/30,///A/31"
    },
    {
      "index": 2,
      "num_nts": 1,
      "nts_short": "U",
      "nts_long": "///A/59"
    }
  ],
  "num_Aminors": 1,
  "Aminors": [
    {
      "index": 1,
      "type": "I",
      "desc_short": "A vs G-C (WC)",
      "desc_long": "///A/52 vs ///A/34,///A/45",
      "A_nt1": {
        "desc": "///A/52 vs ///A/34",
        "face_type": "+",
        "hbonds_num": 3,
        "hbonds_desc": "O2'(hydroxyl)-N2(amino)[3.31],N1-O2'(hydroxyl)[3.41],N3-N2(amino)[3.05]"
      },
      "A_nt2": {
        "desc": "///A/52 vs ///A/45",
        "face_type": "-",
        "hbonds_num": 2,
        "hbonds_desc": "O3'-O2'(hydroxyl)[2.87],O2'(hydroxyl)-O2(carbonyl)[2.97]"
      }
    }
  ],
  "num_splayUnits": 3,
  "splayUnits": [
    {
      "index": 1,
      "num_nts": 3,
      "nts_short": "UUC",
      "nts_long": "///A/13,///A/14,///A/15"
    },
    {
      "index": 2,
      "num_nts": 3,
      "nts_short": "CAG",
      "nts_long": "///A/47,///A/48,///A/49"
    },
    {
      "index": 3,
      "num_nts": 2,
      "nts_short": "UC",
      "nts_long": "///A/53,///A/54"
    }
  ],
  "num_HtypePknots": 3,
  "HtypePknots": [
    {
      "index": 1,
      "desc": "stem#3(hairpin#2) vs stem#4(hairpin#3) L1 groove=MAJOR nts=3 ACG ///A/35,///A/36,///A/37"
    },
    {
      "index": 2,
      "desc": "stem#3(hairpin#2) vs stem#4(hairpin#3) L2 groove=minor nts=3 UCA ///A/42,///A/43,///A/44"
    },
    {
      "index": 3,
      "desc": "stem#3(hairpin#2) vs stem#4(hairpin#3) L3 groove=minor nts=7 AGAUAUC ///A/48,///A/49,///A/50,///A/51,///A/52,///A/53,///A/54"
    }
  ],
  "pseudoknot_order": 1,
  "pseudoknot_nts": [
    {
      "index": 1,
      "symbols": "[]",
      "num_nts": 6,
      "nts_short": "GAGCUC",
      "nts_long": "///A/32,///A/33,///A/34,///A/45,///A/46,///A/47"
    }
  ],
  "dbn": {
    "all_chains": {
      "num_nts": 59,
      "num_chars": 59,
      "bseq": "gGAAGAAAGGGCUUCGGCCACUCAAACUACAGAGACGCCAGUCACUCAGAUAUCCUGGU",
      "bseqUP": "GGAAGAAAGGGCUUCGGCCACUCAAACUACAGAGACGCCAGUCACUCAGAUAUCCUGGU",
      "sstr": "(...((...(((....)))..))...)....[[[...((((...]]].......)))).",
      "form": "..A.A.....A...Z.AB..AA..A...B.....B..AA.B..............A..-"
    },
    "m1_chain_A": {
      "num_nts": 59,
      "num_chars": 59,
      "bseq": "gGAAGAAAGGGCUUCGGCCACUCAAACUACAGAGACGCCAGUCACUCAGAUAUCCUGGU",
      "bseqUP": "GGAAGAAAGGGCUUCGGCCACUCAAACUACAGAGACGCCAGUCACUCAGAUAUCCUGGU",
      "sstr": "(...((...(((....)))..))...)....[[[...((((...]]].......)))).",
      "form": "..A.A.....A...Z.AB..AA..A...B.....B..AA.B..............A..-"
    }
  },
  "chains": {
    "m1_chain_A": {
      "num_nts": 59,
      "bseq": "gGAAGAAAGGGCUUCGGCCACUCAAACUACAGAGACGCCAGUCACUCAGAUAUCCUGGU",
      "sstr": "(...((...(((....)))..))...)....[[[...((((...]]].......)))).",
      "form": "..A.A.....A...Z.AB..AA..A...B.....B..AA.B..............A..-",
      "helical_rise": 0.215,
      "helical_rise_std": 2.788,
      "helical_axis": [
        -0.362,
        -0.704,
        -0.611
      ],
      "point1": [
        -6.031,
        0.464,
        -5.568
      ],
      "point2": [
        -10.423,
        -8.064,
        -12.972
      ],
      "num_chars": 175,
      "suite": "g1aG!!A!!A1aG1aA1eA1cA!!G0aG1aG1aC1aU!!U!!C!!G!!G1aC1aC!!A!!C1aU1aC!!A!!A1cA1aC1aU!!A1aC!!A!!G1aA1aG1eA!!C!!G!!C!!C1aA1aG!!U!!C!!A1aC1aU!!C!!A!!G!!A!!U!!A!!U!!C1aC1aU1aG1tG!!U"
    }
  },
  "num_nts": 59,
  "nts": [
    {
      "index": 1,
      "index_chain": 1,
      "chain_name": "A",
      "nt_resnum": 1,
      "nt_name": "GTP",
      "nt_code": "g",
      "is_modified": true,
      "nt_id": "///A/1",
      "linked_nts": [
        null,
        "///A/2"
      ],
      "nt_type": "RNA",
      "dbn": "(",
      "summary": "modified,anti,~C3'-endo,BI,isolated-canonical,non-pair-contact,helix-end,internal-loop",
      "alpha": null,
      "beta": null,
      "gamma": 112.499,
      "delta": 80.920,
      "epsilon": -167.017,
      "zeta": -81.393,
      "epsilon_zeta": -85.625,
      "bb_type": "BI",
      "chi": -151.833,
      "glyco_bond": "anti",
      "C5prime_xyz": [
        -1.975,
        8.980,
        -0.082
      ],
      "P_xyz": [
        null,
        null,
        null
      ],
      "form": ".",
      "ssZp": 4.135,
      "Dp": 4.277,
      "splay_angle": 22.419,
      "splay_distance": 3.569,
      "splay_ratio": 0.195,
      "d22": null,
      "d64": null,
      "eta": null,
      "theta": null,
      "eta_prime": null,
      "theta_prime": null,
      "eta_base": null,
      "theta_base": null,
      "v0": -11.293,
      "v1": -14.025,
      "v2": 32.385,
      "v3": -39.782,
      "v4": 32.085,
      "amplitude": 39.413,
      "phase_angle": 34.747,
      "puckering": "C3'-endo",
      "sugar_class": "~C3'-endo",
      "bin": "inc",
      "cluster": "__",
      "suiteness": 0.000,
      "filter_rmsd": 0.003,
      "frame": {
        "rmsd": 0.003,
        "origin": [
          8.521,
          -8.242,
          -0.444
        ],
        "x_axis": [
          -0.095,
          0.252,
          0.963
        ],
        "y_axis": [
          0.676,
          -0.694,
          0.248
        ],
        "z_axis": [
          0.731,
          0.675,
          -0.104
        ],
        "quaternion": [
          -0.163,
          0.652,
          0.356,
          0.649
        ]
      }
    },
    {
      "index": 2,
      "index_chain": 2,
      "chain_name": "A",
      "nt_resnum": 2,
      "nt_name": "G",
      "nt_code": "G",
      "nt_id": "///A/2",
      "linked_nts": [
        "///A/1",
        "///A/3"
      ],
      "nt_type": "RNA",
      "dbn": ".",
      "summary": "anti,~C3'-endo,BI,non-canonical,non-pair-contact,helix,internal-loop",
      "alpha": -80.512,
      "beta": 165.461,
      "gamma": 83.903,
      "delta": 90.328,
      "epsilon": -137.824,
      "zeta": -94.842,
      "epsilon_zeta": -42.982,
      "bb_type": "BI",
      "chi": -141.594,
      "glyco_bond": "anti",
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      "residue_pair": "nt:nt"
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    {
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      "atom_pair": "N:N",
      "residue_pair": "nt:nt"
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      "atom1_id": "///A/35/N1",
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      "atom_pair": "N:O",
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      "atom1_id": "///A/37/O6",
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      "atom_pair": "O:O",
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      "atom_pair": "N:N",
      "residue_pair": "nt:nt"
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    {
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      "distance": 2.824,
      "atom1_id": "///A/38/N4",
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      "atom_pair": "N:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 69,
      "atom1_serNum": 1258,
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      "atom1_id": "///A/39/O2",
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      "atom_pair": "O:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 70,
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      "distance": 2.940,
      "atom1_id": "///A/39/N3",
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      "atom_pair": "N:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 71,
      "atom1_serNum": 1261,
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      "donAcc_type": "standard",
      "distance": 2.918,
      "atom1_id": "///A/39/N4",
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      "atom_pair": "N:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 72,
      "atom1_serNum": 1292,
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      "donAcc_type": "standard",
      "distance": 2.691,
      "atom1_id": "///A/40/N6",
      "atom2_id": "///A/56/O4",
      "atom_pair": "N:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 73,
      "atom1_serNum": 1293,
      "atom2_serNum": 1798,
      "donAcc_type": "standard",
      "distance": 2.770,
      "atom1_id": "///A/40/N1",
      "atom2_id": "///A/56/N3",
      "atom_pair": "N:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 74,
      "atom1_serNum": 1318,
      "atom2_serNum": 1348,
      "donAcc_type": "acceptable",
      "distance": 2.586,
      "atom1_id": "///A/41/O2'",
      "atom2_id": "///A/42/O4'",
      "atom_pair": "O:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 75,
      "atom1_serNum": 1325,
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      "donAcc_type": "standard",
      "distance": 2.889,
      "atom1_id": "///A/41/O6",
      "atom2_id": "///A/55/N4",
      "atom_pair": "O:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 76,
      "atom1_serNum": 1326,
      "atom2_serNum": 1767,
      "donAcc_type": "standard",
      "distance": 2.990,
      "atom1_id": "///A/41/N1",
      "atom2_id": "///A/55/N3",
      "atom_pair": "N:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 77,
      "atom1_serNum": 1328,
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      "donAcc_type": "standard",
      "distance": 2.992,
      "atom1_id": "///A/41/N2",
      "atom2_id": "///A/55/O2",
      "atom_pair": "N:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 78,
      "atom1_serNum": 1359,
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      "donAcc_type": "standard",
      "distance": 3.161,
      "atom1_id": "///A/42/O4",
      "atom2_id": "///A/44/N6",
      "atom_pair": "O:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 79,
      "atom1_serNum": 1389,
      "atom2_serNum": 1766,
      "donAcc_type": "standard",
      "distance": 2.734,
      "atom1_id": "///A/43/N4",
      "atom2_id": "///A/55/O2",
      "atom_pair": "N:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 80,
      "atom1_serNum": 1389,
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      "donAcc_type": "standard",
      "distance": 2.764,
      "atom1_id": "///A/43/N4",
      "atom2_id": "///A/56/O4'",
      "atom_pair": "N:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 81,
      "atom1_serNum": 1413,
      "atom2_serNum": 1738,
      "donAcc_type": "acceptable",
      "distance": 3.321,
      "atom1_id": "///A/44/O2'",
      "atom2_id": "///A/54/N4",
      "atom_pair": "O:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 82,
      "atom1_serNum": 1423,
      "atom2_serNum": 1738,
      "donAcc_type": "standard",
      "distance": 3.207,
      "atom1_id": "///A/44/N3",
      "atom2_id": "///A/54/N4",
      "atom_pair": "N:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 83,
      "atom1_serNum": 1442,
      "atom2_serNum": 1738,
      "donAcc_type": "standard",
      "distance": 3.132,
      "atom1_id": "///A/45/O4'",
      "atom2_id": "///A/54/N4",
      "atom_pair": "O:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 84,
      "atom1_serNum": 1446,
      "atom2_serNum": 1666,
      "donAcc_type": "acceptable",
      "distance": 2.874,
      "atom1_id": "///A/45/O2'",
      "atom2_id": "///A/52/O3'",
      "atom_pair": "O:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 85,
      "atom1_serNum": 1446,
      "atom2_serNum": 1692,
      "donAcc_type": "acceptable",
      "distance": 2.603,
      "atom1_id": "///A/45/O2'",
      "atom2_id": "///A/53/OP1",
      "atom_pair": "O:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 86,
      "atom1_serNum": 1450,
      "atom2_serNum": 1668,
      "donAcc_type": "acceptable",
      "distance": 2.967,
      "atom1_id": "///A/45/O2",
      "atom2_id": "///A/52/O2'",
      "atom_pair": "O:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 87,
      "atom1_serNum": 1475,
      "atom2_serNum": 1636,
      "donAcc_type": "questionable",
      "distance": 3.151,
      "atom1_id": "///A/46/O3'",
      "atom2_id": "///A/51/O3'",
      "atom_pair": "O:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 88,
      "atom1_serNum": 1477,
      "atom2_serNum": 1638,
      "donAcc_type": "acceptable",
      "distance": 2.616,
      "atom1_id": "///A/46/O2'",
      "atom2_id": "///A/51/O2'",
      "atom_pair": "O:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 89,
      "atom1_serNum": 1507,
      "atom2_serNum": 1569,
      "donAcc_type": "acceptable",
      "distance": 2.490,
      "atom1_id": "///A/47/O2'",
      "atom2_id": "///A/49/O3'",
      "atom_pair": "O:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 90,
      "atom1_serNum": 1507,
      "atom2_serNum": 1596,
      "donAcc_type": "acceptable",
      "distance": 2.658,
      "atom1_id": "///A/47/O2'",
      "atom2_id": "///A/50/OP1",
      "atom_pair": "O:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 91,
      "atom1_serNum": 1507,
      "atom2_serNum": 1601,
      "donAcc_type": "acceptable",
      "distance": 2.540,
      "atom1_id": "///A/47/O2'",
      "atom2_id": "///A/50/O4'",
      "atom_pair": "O:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 92,
      "atom1_serNum": 1511,
      "atom2_serNum": 1609,
      "donAcc_type": "questionable",
      "distance": 2.756,
      "atom1_id": "///A/47/O2",
      "atom2_id": "///A/50/N7",
      "atom_pair": "O:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 93,
      "atom1_serNum": 1605,
      "atom2_serNum": 1615,
      "donAcc_type": "acceptable",
      "distance": 3.118,
      "atom1_id": "///A/50/O2'",
      "atom2_id": "///A/50/N3",
      "atom_pair": "O:N",
      "residue_pair": "nt:nt"
    }
  ],
  "refCoords": {
    "purine": [
      "   12 ATOMS,    12 BONDS",
      "    1 N      -2.2500   5.0000   0.4000",
      "    2 N      -2.2500  -0.5000   0.4000",
      "    3 N      -2.2500  -0.5000  -0.4000",
      "    4 N      -2.2500   5.0000  -0.4000",
      "    5 C       1.2500   5.0000   0.4000",
      "    6 C       1.2500  -0.5000   0.4000",
      "    7 C       1.2500  -0.5000  -0.4000",
      "    8 C       1.2500   5.0000  -0.4000",
      "    9 C      -2.2500   5.0000   0.4000",
      "   10 C      -2.2500  -0.5000   0.4000",
      "   11 C      -2.2500  -0.5000  -0.4000",
      "   12 C      -2.2500   5.0000  -0.4000",
      "    1     1     2",
      "    2     2     3",
      "    3     3     4",
      "    4     4     1",
      "    5     5     6",
      "    6     6     7",
      "    7     7     8",
      "    8     5     8",
      "    9     9     5",
      "   10    10     6",
      "   11    11     7",
      "   12    12     8"
    ],
    "pyrimidine": [
      "   12 ATOMS,    12 BONDS",
      "    1 N      -2.2500   5.0000   0.4000",
      "    2 N      -2.2500   1.0000   0.4000",
      "    3 N      -2.2500   1.0000  -0.4000",
      "    4 N      -2.2500   5.0000  -0.4000",
      "    5 C       1.2500   5.0000   0.4000",
      "    6 C       1.2500   1.0000   0.4000",
      "    7 C       1.2500   1.0000  -0.4000",
      "    8 C       1.2500   5.0000  -0.4000",
      "    9 C      -2.2500   5.0000   0.4000",
      "   10 C      -2.2500   1.0000   0.4000",
      "   11 C      -2.2500   1.0000  -0.4000",
      "   12 C      -2.2500   5.0000  -0.4000",
      "    1     1     2",
      "    2     2     3",
      "    3     3     4",
      "    4     4     1",
      "    5     5     6",
      "    6     6     7",
      "    7     7     8",
      "    8     5     8",
      "    9     9     5",
      "   10    10     6",
      "   11    11     7",
      "   12    12     8"
    ],
    "wc_pair": [
      "   12 ATOMS,    12 BONDS",
      "    1 N      -2.2500   5.0000   0.4000",
      "    2 N      -2.2500  -5.0000   0.4000",
      "    3 N      -2.2500  -5.0000  -0.4000",
      "    4 N      -2.2500   5.0000  -0.4000",
      "    5 C       2.2500   5.0000   0.4000",
      "    6 C       2.2500  -5.0000   0.4000",
      "    7 C       2.2500  -5.0000  -0.4000",
      "    8 C       2.2500   5.0000  -0.4000",
      "    9 C      -2.2500   5.0000   0.4000",
      "   10 C      -2.2500  -5.0000   0.4000",
      "   11 C      -2.2500  -5.0000  -0.4000",
      "   12 C      -2.2500   5.0000  -0.4000",
      "    1     1     2",
      "    2     2     3",
      "    3     3     4",
      "    4     4     1",
      "    5     5     6",
      "    6     6     7",
      "    7     7     8",
      "    8     5     8",
      "    9     9     5",
      "   10    10     6",
      "   11    11     7",
      "   12    12     8"
    ]
  },
  "metadata": {
    "license": "http://innovation.columbia.edu/technologies/CU20391",
    "url": "http://x3dna.org/",
    "url_alt": "http://home.x3dna.org/",
    "forum": "http://forum.x3dna.org/",
    "citation": "Lu et al. (2015). 'DSSR: an integrated software tool for dissecting the spatial structure of RNA.' Nucleic Acids Res., 43(21):e142 [doi:10.1093/nar/gkv716].",
    "str_id": "2m58",
    "num_naChains": 1,
    "naChains": "A=59",
    "num_atoms": 1911,
    "num_waters": 0,
    "num_notes": 52,
    "notes": [
      {
        "Aminors": "A-minor interactions (including types I and II)"
      },
      {
        "Cstem_index": "stem index of the 'Canonical' helix in k-turn"
      },
      {
        "Cstem_pair": "Cstem bp delineating the k-turn internal loop"
      },
      {
        "Dp": "perpendicular distance of the 3' P atom to the glycosidic bond"
      },
      {
        "GA_pair": "sheared G-A pair in k-turn"
      },
      {
        "HtypePknot": "H-type pseudoknot"
      },
      {
        "Kturn": "kink-turn (k-turn)"
      },
      {
        "LW": "Leontis-Westhof"
      },
      {
        "NCstem_index": "stem index of the 'Non-Canonical' helix in k-turn"
      },
      {
        "NCstem_pair": "NCstem bp delineating the k-turn internal loop"
      },
      {
        "Uturn": "U-turn of the UNR- or GNRA-type"
      },
      {
        "aa": "amino acid"
      },
      {
        "atom_pair": "symbols of the two atoms involved in an H-bond"
      },
      {
        "auxfiles": "auxiliary files"
      },
      {
        "glyco_bond": "conformation of base related to sugar (syn or anti)"
      },
      {
        "bb_type": "backbone conformation, BI or BII"
      },
      {
        "bending_angle": "angle between two helical axes"
      },
      {
        "bp": "base pair"
      },
      {
        "bseq": "base sequence in one-letter code"
      },
      {
        "bulge": "bulge loop"
      },
      {
        "coaxStacks": "coaxial stacking of stems within a helix"
      },
      {
        "dbn": "dot bracket notation"
      },
      {
        "desc": "description"
      },
      {
        "donAcc_type": "donor/acceptor type of the atom pair in an H-bond"
      },
      {
        "epsilon_zeta": "difference between epsilon and zeta torsion angles"
      },
      {
        "hairpin": "hairpin loop"
      },
      {
        "hbond": "hydrogen bond (H-bond)"
      },
      {
        "helix": "defined by base-stacking interactions, regardless of bp type and backbone connectivity"
      },
      {
        "id": "identifier"
      },
      {
        "iloop": "internal loop"
      },
      {
        "index": "serial number"
      },
      {
        "isoCanonPairs": "isolated canonical pairs"
      },
      {
        "junction": "(multi-branched) junction loop"
      },
      {
        "kissingLoop": "kissing loop"
      },
      {
        "multiplet": "3+ bases in a coplanar geometry"
      },
      {
        "na": "nucleic acid"
      },
      {
        "nonPair": "two nts not forming a pair, but with H-bonding/stacking interactions"
      },
      {
        "nonStack": "nucleotide not involved in stacking interactions"
      },
      {
        "nt": "nucleotide"
      },
      {
        "num": "number"
      },
      {
        "oArea": "overlap areas between two bases, including exocyclic atoms"
      },
      {
        "oArea_ring": "overlap areas between two bases, including only ring atoms"
      },
      {
        "phosContacts": "H-bonding and atom-capping interactions involving a phosphate"
      },
      {
        "residue_pair": "types of the two residues involved in an H-bond"
      },
      {
        "rmsd": "root-mean-squares deviation"
      },
      {
        "serNum": "serial number"
      },
      {
        "ssSegments": "single-stranded segments not involved in loops"
      },
      {
        "ssZp": "Z-coordinate of the 3' phosphorus atom with reference to the 5' base plane"
      },
      {
        "sstr": "secondary structure in dbn"
      },
      {
        "stem": "helix consisting of only canonical pairs, with a continuous backbone"
      },
      {
        "str_id": "structure identifier, derived from inpfile with extension removed"
      },
      {
        "vert_dist": "vertical distance from an atom to a base plane"
      }
    ],
    "num_auxfiles": 14,
    "auxfiles": [
      {
        "index": 1,
        "name": "dssr-pairs.pdb",
        "desc": "an ensemble of base pairs"
      },
      {
        "index": 2,
        "name": "dssr-multiplets.pdb",
        "desc": "an ensemble of multiplets"
      },
      {
        "index": 3,
        "name": "dssr-stems.pdb",
        "desc": "an ensemble of stems"
      },
      {
        "index": 4,
        "name": "dssr-helices.pdb",
        "desc": "an ensemble of helices (coaxial stacking)"
      },
      {
        "index": 5,
        "name": "dssr-hairpins.pdb",
        "desc": "an ensemble of hairpin loops"
      },
      {
        "index": 6,
        "name": "dssr-iloops.pdb",
        "desc": "an ensemble of internal loops"
      },
      {
        "index": 7,
        "name": "dssr-2ndstrs.bpseq",
        "desc": "secondary structure in bpseq format"
      },
      {
        "index": 8,
        "name": "dssr-2ndstrs.ct",
        "desc": "secondary structure in connectivity table format"
      },
      {
        "index": 9,
        "name": "dssr-2ndstrs.dbn",
        "desc": "secondary structure in dot-bracket notation"
      },
      {
        "index": 10,
        "name": "dssr-torsions.txt",
        "desc": "backbone torsion angles and suite names"
      },
      {
        "index": 11,
        "name": "dssr-splays.pdb",
        "desc": "an ensemble of splayed-apart units"
      },
      {
        "index": 12,
        "name": "dssr-Aminors.pdb",
        "desc": "an ensemble of A minor motifs (types I and II)"
      },
      {
        "index": 13,
        "name": "dssr-stacks.pdb",
        "desc": "an ensemble of base stacks"
      },
      {
        "index": 14,
        "name": "dssr-atom2bases.pdb",
        "desc": "an ensemble of atom-base stacking interactions"
      }
    ],
    "time_used": "999"
  }
}
