**************************************************************************** File name: 7u7e.pdb no. of DNA/RNA chains: 2 [P=8,T=12] no. of nucleotides: 20 no. of atoms: 4201 no. of waters: 447 no. of metals: 1 [Mn=1] **************************************************************************** List of 8 base pairs nt1 nt2 bp name Saenger LW DSSR 1 T.DA5 P.DT8 A-T WC 20-XX cWW cW-W 2 T.DT6 P.DA7 T-A WC 20-XX cWW cW-W 3 T.DG7 P.DC6 G-C WC 19-XIX cWW cW-W 4 T.DA8 P.DT5 A-T WC 20-XX cWW cW-W 5 T.DC9 P.DG4 C-G WC 19-XIX cWW cW-W 6 T.DG10 P.DC3 G-C WC 19-XIX cWW cW-W 7 T.DC11 P.DG2 C-G WC 19-XIX cWW cW-W 8 T.DT12 P.DA1 T-A WC 20-XX cWW cW-W **************************************************************************** List of 1 helix Note: A helix is defined by base-stacking interactions, regardless of pair type and backbone connectivity, and may contain more than one stem. helix#number[stems-contained] bps=number-of-base-pairs in the helix bp-type: '|' for a canonical WC/wobble pair, '.' otherwise helix-form: classification of a dinucleotide step comprising the bp above the given designation and the bp that follows it. Types include 'A', 'B' or 'Z' for the common A-, B- and Z-form helices, '.' for an unclassified step, and 'x' for a step without a continuous backbone. -------------------------------------------------------------------- helix#1[1] bps=8 strand-1 5'-ATGACGCT-3' bp-type |||||||| strand-2 3'-TACTGCGA-5' helix-form .BBBBBB 1 T.DA5 P.DT8 A-T WC 20-XX cWW cW-W 2 T.DT6 P.DA7 T-A WC 20-XX cWW cW-W 3 T.DG7 P.DC6 G-C WC 19-XIX cWW cW-W 4 T.DA8 P.DT5 A-T WC 20-XX cWW cW-W 5 T.DC9 P.DG4 C-G WC 19-XIX cWW cW-W 6 T.DG10 P.DC3 G-C WC 19-XIX cWW cW-W 7 T.DC11 P.DG2 C-G WC 19-XIX cWW cW-W 8 T.DT12 P.DA1 T-A WC 20-XX cWW cW-W **************************************************************************** List of 1 stem Note: A stem is defined as a helix consisting strictly of canonical WC/wobble pairs with a continuous backbone. stem#number[#helix-number containing this stem] Other terms are defined as in the above Helix section. -------------------------------------------------------------------- stem#1[#1] bps=8 strand-1 5'-ATGACGCT-3' bp-type |||||||| strand-2 3'-TACTGCGA-5' helix-form .BBBBBB 1 T.DA5 P.DT8 A-T WC 20-XX cWW cW-W 2 T.DT6 P.DA7 T-A WC 20-XX cWW cW-W 3 T.DG7 P.DC6 G-C WC 19-XIX cWW cW-W 4 T.DA8 P.DT5 A-T WC 20-XX cWW cW-W 5 T.DC9 P.DG4 C-G WC 19-XIX cWW cW-W 6 T.DG10 P.DC3 G-C WC 19-XIX cWW cW-W 7 T.DC11 P.DG2 C-G WC 19-XIX cWW cW-W 8 T.DT12 P.DA1 T-A WC 20-XX cWW cW-W **************************************************************************** List of 2 base stacks Note: A stack is an ordered list of nucleotides assembled together via base-stacking interactions, regardless of backbone connectivity. Stacking interactions within a stem are *not* included. 1 nts=2 WA A.TRP42,T.DA2 2 nts=3 TTA T.DT3,T.DT4,T.DA5 **************************************************************************** List of 1 non-loop single-stranded segment 1 nts=4 CATT T.DC1,T.DA2,T.DT3,T.DT4 **************************************************************************** List of 1 splayed-apart dinucleotide 1 T.DA2 T.DT3 angle=114 distance=17.4 ratio=0.84 ---------------------------------------------------------------- Summary of 1 splayed-apart unit 1 nts=2 AT T.DA2,T.DT3 **************************************************************************** Secondary structures in dot-bracket notation (dbn) as a whole and per chain >7u7e nts=20 [whole] CATTATGACGCT&AGCGTCAT ....((((((((&)))))))) >7u7e-T #1 nts=12 3.26(0.58) [chain] DNA CATTATGACGCT ....(((((((( >7u7e-P #2 nts=8 3.54(0.16) [chain] DNA AGCGTCAT )))))))) **************************************************************************** Summary of structural features of 20 nucleotides Note: the first five columns are: (1) serial number, (2) one-letter shorthand name, (3) dbn, (4) id string, (5) rmsd (~zero) of base ring atoms fitted against those in a standard base reference frame. The sixth (last) column contains a comma-separated list of features whose meanings are mostly self-explanatory, except for: turn: angle C1'(i-1)--C1'(i)--C1'(i+1) < 90 degrees break: no backbone linkage between O3'(i-1) and P(i) 1 C . T.DC1 --- non-stack,ss-non-loop 2 A . T.DA2 0.004 ~C2'-endo,non-pair-contact,ss-non-loop,splayed-apart 3 T . T.DT3 0.007 anti,~C3'-endo,non-pair-contact,ss-non-loop,splayed-apart 4 T . T.DT4 0.008 anti,~C2'-endo,BI,non-pair-contact,ss-non-loop 5 A ( T.DA5 0.004 anti,~C2'-endo,BI,canonical,non-pair-contact,helix-end,stem-end,phosphate 6 T ( T.DT6 0.004 anti,BI,canonical,non-pair-contact,helix,stem,phosphate 7 G ( T.DG7 0.005 anti,BI,canonical,non-pair-contact,helix,stem,phosphate 8 A ( T.DA8 0.006 anti,~C2'-endo,BI,canonical,non-pair-contact,helix,stem,phosphate 9 C ( T.DC9 0.006 anti,~C2'-endo,canonical,non-pair-contact,helix,stem,phosphate 10 G ( T.DG10 0.007 anti,~C2'-endo,BI,canonical,non-pair-contact,helix,stem 11 C ( T.DC11 0.003 anti,~C2'-endo,BI,canonical,non-pair-contact,helix,stem 12 T ( T.DT12 0.004 anti,~C2'-endo,canonical,non-pair-contact,helix-end,stem-end 13 A ) P.DA1 0.007 anti,~C2'-endo,BI,canonical,non-pair-contact,helix-end,stem-end 14 G ) P.DG2 0.011 anti,~C2'-endo,BI,canonical,non-pair-contact,helix,stem,phosphate 15 C ) P.DC3 0.005 anti,~C2'-endo,BI,canonical,non-pair-contact,helix,stem,phosphate 16 G ) P.DG4 0.007 anti,~C2'-endo,BI,canonical,non-pair-contact,helix,stem,phosphate 17 T ) P.DT5 0.004 anti,~C2'-endo,BI,canonical,non-pair-contact,helix,stem,phosphate 18 C ) P.DC6 0.004 anti,BI,canonical,non-pair-contact,helix,stem,phosphate 19 A ) P.DA7 0.006 anti,BI,canonical,non-pair-contact,helix,stem,phosphate 20 T ) P.DT8 0.009 anti,~C2'-endo,canonical,non-pair-contact,helix-end,stem-end **************************************************************************** List of 13 additional files 1 dssr-pairs.pdb -- an ensemble of base pairs 2 dssr-stems.pdb -- an ensemble of stems 3 dssr-helices.pdb -- an ensemble of helices (coaxial stacking) 4 dssr-2ndstrs.bpseq -- secondary structure in bpseq format 5 dssr-2ndstrs.ct -- secondary structure in connectivity table format 6 dssr-2ndstrs.dbn -- secondary structure in dot-bracket notation 7 dssr-torsions.txt -- backbone torsion angles and suite names 8 dssr-splays.pdb -- an ensemble of splayed-apart units 9 dssr-stacks.pdb -- an ensemble of base stacks 10 dssr-rotmat.txt -- position vector and rotation matrix 11 dssr-viewV.pdb -- vertical view of the principal moment of inertia 12 dssr-viewH.pdb -- horizontal view of the principal moment of inertia 13 dssr-viewT.pdb -- top view of the principal moment of inertia