Contacts of the helix formed by residues 245 - 272 (chain C) in PDB entry 6D6Q


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with GLY 245 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    244C  THR*     1.3    77.3    -      -       -      +
    246C  ALA*     1.3    56.0    +      -       -      +
    248C  LEU*     3.4    13.9    -      -       -      +
    249C  GLN*     2.9    32.7    +      -       -      +
    207D  GLN*     3.9    26.4    +      -       -      -
    210D  LEU*     4.8    11.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 246 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    244C  THR*     2.7    15.8    +      -       +      +
    245C  GLY*     1.3    74.9    -      -       -      +
    247C  LYS*     1.3    62.5    +      -       +      +
    248C  LEU      3.1     2.3    +      -       -      -
    249C  GLN*     4.2     7.3    +      -       -      +
    250C  ASP*     4.2    12.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 247 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    203C  ASP      5.7     0.4    -      -       -      +
    204C  THR*     2.4    51.8    +      -       +      +
    206C  LEU*     3.1    38.9    -      -       +      +
    243C  LEU*     4.0    26.7    -      -       +      +
    244C  THR*     2.8    19.3    +      -       -      +
    246C  ALA*     1.3    77.4    -      -       +      +
    248C  LEU*     1.3    56.6    +      -       -      +
    250C  ASP*     4.7     5.8    -      -       -      +
    251C  CYS*     3.4     8.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 248 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    222C  LEU*     4.4    17.5    -      -       +      -
    224C  ILE*     5.2     4.5    -      -       +      -
    235C  LEU*     4.2    28.7    -      -       +      -
    243C  LEU*     5.0     9.2    -      -       +      -
    244C  THR      3.9     3.4    -      -       -      +
    245C  GLY*     3.4    19.1    -      -       -      +
    246C  ALA      3.1     0.2    -      -       -      -
    247C  LYS*     1.3    79.2    -      -       -      +
    249C  GLN*     1.3    66.8    +      -       -      +
    250C  ASP      3.2     1.6    -      -       -      -
    251C  CYS*     3.1    11.1    +      -       +      +
    252C  MET*     3.0    34.3    +      -       -      +
    192D  LEU*     5.2    10.3    -      -       +      -
    206D  LEU*     4.2    16.8    -      -       +      -
    207D  GLN*     4.2    17.3    -      -       -      +
    210D  LEU*     5.0     9.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 249 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    245C  GLY      2.9    15.4    +      -       -      +
    246C  ALA*     4.8     4.5    -      -       -      +
    248C  LEU*     1.3    76.0    -      -       -      +
    250C  ASP*     1.3    57.7    +      -       -      +
    252C  MET*     3.2    14.4    +      -       -      +
    253C  SER*     3.0    29.8    +      -       -      +
    203D  ASP*     2.5    39.8    +      -       -      +
    207D  GLN*     4.4     8.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 250 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    206C  LEU*     6.4     0.4    -      -       +      -
    246C  ALA      4.2    12.1    +      -       -      +
    247C  LYS*     5.1     4.3    -      -       -      -
    248C  LEU      3.2     1.0    -      -       -      -
    249C  GLN*     1.3    78.9    -      -       -      +
    251C  CYS*     1.3    61.7    +      -       -      +
    253C  SER*     2.4    33.9    +      -       -      -
    254C  ARG*     3.0    10.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with CYS 251 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    198C  PHE*     3.3    51.9    -      -       +      -
    206C  LEU*     3.5    19.1    -      -       -      -
    222C  LEU*     5.3     8.7    -      -       +      -
    224C  ILE*     5.2     3.6    -      -       +      -
    243C  LEU*     6.2     0.2    -      -       -      -
    247C  LYS      3.4    21.1    -      -       -      -
    248C  LEU*     3.1    14.8    +      -       +      +
    250C  ASP*     1.3    80.4    -      -       -      +
    252C  MET*     1.3    58.9    +      -       +      +
    254C  ARG*     3.3     1.0    +      -       -      -
    255C  ALA*     2.9    29.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 252 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    224C  ILE*     3.7    20.0    -      -       +      -
    226C  MET*     4.8     7.4    -      -       +      +
    232C  LEU*     3.5    33.2    -      -       +      -
    248C  LEU*     3.0    20.5    +      -       +      +
    249C  GLN*     3.2    17.7    +      -       -      +
    251C  CYS*     1.3    76.0    -      -       -      +
    253C  SER*     1.3    62.9    +      -       -      +
    255C  ALA*     3.2     8.6    +      -       -      +
    256C  VAL*     3.0    28.0    +      -       +      +
    203D  ASP*     3.3    50.5    -      -       +      +
    206D  LEU*     4.5    13.2    -      -       +      -
    207D  GLN*     5.1     1.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 253 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    249C  GLN*     3.0    14.6    +      -       -      +
    250C  ASP*     2.4    38.5    +      -       -      -
    252C  MET*     1.3    75.4    -      -       -      +
    254C  ARG*     1.3    64.6    +      -       -      +
    256C  VAL*     3.0    20.2    +      -       -      +
    257C  THR*     3.0    15.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 254 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30C  GLY*     2.7    30.1    +      -       -      -
     31C  GLU*     3.7    13.9    -      -       -      +
     32C  PHE*     3.7    24.9    -      -       -      +
    196C  THR*     4.8     4.3    -      -       +      -
    198C  PHE*     4.6     7.0    -      -       +      -
    208C  VAL*     4.6    16.8    -      -       +      +
    250C  ASP*     3.0    14.2    +      -       -      +
    251C  CYS*     3.7     7.0    -      -       -      +
    253C  SER*     1.3    81.8    +      -       -      +
    255C  ALA*     1.3    56.9    +      -       -      +
    257C  THR*     3.2    17.9    +      -       -      +
    258C  ARG*     3.0    51.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 255 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    194C  VAL*     5.6     0.7    -      -       -      +
    196C  THR*     3.5    24.8    +      -       -      +
    224C  ILE*     3.9    20.9    -      -       +      +
    226C  MET*     4.1    19.7    -      -       +      +
    251C  CYS      2.9    14.7    +      -       -      +
    252C  MET*     3.4    11.9    -      -       -      +
    253C  SER      3.1     0.2    -      -       -      -
    254C  ARG*     1.3    74.5    -      -       -      +
    256C  VAL*     1.3    60.2    +      -       -      +
    258C  ARG*     3.3     2.1    +      -       -      +
    259C  HIS*     2.9    28.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 256 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    226C  MET*     3.9    29.2    -      -       +      -
    230C  GLY*     6.0     0.4    -      -       -      -
    252C  MET      3.0    16.8    +      -       -      +
    253C  SER*     3.0    10.5    +      -       -      +
    255C  ALA*     1.3    75.7    -      -       -      +
    257C  THR*     1.3    63.6    +      -       -      +
    259C  HIS*     3.2    10.0    +      -       +      +
    260C  LYS*     3.0    45.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 257 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    253C  SER      3.0    13.9    +      -       -      -
    254C  ARG*     3.5    25.9    -      -       -      +
    255C  ALA      3.2     0.2    -      -       -      -
    256C  VAL*     1.3    76.1    -      -       -      +
    258C  ARG*     1.3    61.7    +      -       -      +
    260C  LYS*     3.2    15.6    +      -       +      +
    261C  GLU*     3.0    23.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 258 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32C  PHE*     3.1    45.7    -      -       +      +
     33C  ARG      5.3     0.2    +      -       -      -
     35C  THR*     2.9    40.2    +      -       -      +
     53C  LEU*     3.8    10.3    -      -       -      +
    150C  ASP*     6.3     1.2    -      -       -      +
    154C  PHE*     5.9     1.4    -      -       -      -
    194C  VAL*     4.3     9.7    -      -       +      +
    195C  ALA      4.7     2.3    +      -       -      +
    196C  THR*     3.7    19.1    -      -       -      +
    254C  ARG*     3.0    29.4    +      -       -      +
    255C  ALA      3.3     0.8    +      -       -      +
    257C  THR*     1.3    73.7    -      -       -      +
    259C  HIS*     1.3    66.5    +      -       -      +
    261C  GLU*     2.8    32.8    +      -       -      +
    262C  VAL*     3.0    42.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 259 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    192C  HIS*     3.0    27.0    +      -       -      +
    194C  VAL*     3.8    14.7    -      -       +      +
    226C  MET*     3.0    28.0    -      -       +      +
    227C  ASP      4.8     1.3    -      -       -      -
    228C  GLU*     3.3    40.1    +      -       +      +
    255C  ALA      2.9    14.4    +      -       -      +
    256C  VAL*     3.2    14.5    +      -       +      +
    258C  ARG*     1.3    75.5    -      -       -      +
    260C  LYS*     1.3    69.5    +      -       -      +
    262C  VAL*     3.4     7.7    -      -       -      +
    263C  LYS*     3.0    49.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 260 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    256C  VAL*     3.0    31.4    +      -       +      +
    257C  THR*     3.2    13.8    +      -       +      +
    259C  HIS*     1.3    85.5    +      -       -      +
    261C  GLU*     1.3    64.9    +      -       -      +
    263C  LYS*     3.9     3.0    -      -       -      +
    264C  LYS*     3.0    44.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 261 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35C  THR*     5.2     2.0    -      -       -      -
    257C  THR*     3.0    14.7    +      -       +      +
    258C  ARG*     2.8    38.9    +      -       -      +
    260C  LYS*     1.3    78.2    -      -       -      +
    262C  VAL*     1.3    77.4    +      -       -      +
    264C  LYS*     3.2    10.8    +      -       -      +
    265C  LEU*     3.0    37.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 262 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35C  THR*     5.2     1.8    -      -       +      -
    154C  PHE*     3.8    29.0    -      -       +      -
    194C  VAL*     3.2    40.6    -      -       +      -
    258C  ARG*     3.0    47.7    +      -       +      +
    259C  HIS      3.4     1.3    -      -       -      +
    261C  GLU*     1.3    92.4    -      -       -      +
    263C  LYS*     1.3    60.2    +      -       -      +
    265C  LEU*     3.3     7.4    +      -       -      +
    266C  MET*     2.9    29.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 263 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    161C  LYS*     5.9     1.1    -      -       -      +
    192C  HIS*     4.1    32.0    +      -       +      -
    194C  VAL*     5.8     1.6    -      -       +      -
    228C  GLU*     2.6    28.6    +      -       -      +
    259C  HIS*     3.0    38.9    +      -       +      +
    260C  LYS*     3.9     3.4    -      -       -      +
    262C  VAL*     1.3    76.9    -      -       +      +
    264C  LYS*     1.3    67.3    +      -       -      +
    266C  MET*     3.3     8.7    +      -       +      +
    267C  ASP*     2.9    47.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 264 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260C  LYS*     3.0    31.9    +      -       -      +
    261C  GLU*     3.4    10.7    -      -       -      +
    263C  LYS*     1.3    77.3    -      -       -      +
    265C  LEU*     1.3    62.8    +      -       -      +
    267C  ASP*     3.3     8.2    +      -       -      +
    268C  GLU*     2.9    35.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 265 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35C  THR*     3.7    34.5    -      -       +      +
     36C  THR*     5.1     0.7    -      -       -      -
     37C  VAL*     3.7    33.0    -      -       +      +
    154C  PHE*     4.1    13.5    -      -       +      -
    261C  GLU*     3.0    32.2    +      -       -      +
    262C  VAL*     3.5     9.9    -      -       -      +
    263C  LYS      3.2     0.2    -      -       -      -
    264C  LYS*     1.3    77.0    -      -       -      +
    266C  MET*     1.3    63.5    +      -       -      +
    268C  GLU*     3.1    15.2    +      -       -      +
    269C  VAL*     3.0    30.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 266 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37C  VAL*     5.7     1.8    -      -       +      -
     39C  ILE*     6.2     1.6    -      -       +      -
    154C  PHE*     3.3    36.1    -      -       +      +
    157C  LEU*     3.8    24.7    -      -       +      -
    158C  ALA*     4.0    26.5    -      -       +      +
    161C  LYS*     3.5    41.1    -      -       +      +
    192C  HIS*     5.1     1.8    -      -       -      -
    194C  VAL*     6.4     0.2    -      -       +      -
    262C  VAL*     2.9    15.4    +      -       +      +
    263C  LYS*     3.8     8.5    -      -       +      +
    265C  LEU*     1.3    81.7    -      -       -      +
    267C  ASP*     1.3    57.3    +      -       -      +
    269C  VAL*     3.2     6.3    +      -       +      +
    270C  ILE*     2.9    38.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 267 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    161C  LYS*     3.8    18.0    +      -       -      -
    263C  LYS*     2.9    43.5    +      -       -      +
    264C  LYS*     3.6     7.1    -      -       -      +
    266C  MET*     1.3    73.7    -      -       -      +
    268C  GLU*     1.3    66.7    +      -       +      +
    270C  ILE*     3.1    16.4    -      -       +      +
    271C  LYS*     2.9    26.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 268 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    264C  LYS*     2.9    27.7    +      -       +      +
    265C  LEU*     3.4    13.5    -      -       -      +
    267C  ASP*     1.3    75.1    -      -       -      +
    269C  VAL*     1.3    58.9    +      -       +      +
    271C  LYS*     3.4    20.4    +      -       -      +
    272C  SER*     2.9    29.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 269 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37C  VAL*     3.5    29.2    -      -       +      +
     38C  ASN*     5.7     0.4    -      -       -      -
     39C  ILE*     3.6    34.5    -      -       +      +
    265C  LEU*     3.0    19.6    +      -       +      +
    266C  MET*     3.6     7.9    -      -       +      +
    267C  ASP      3.1     0.2    -      -       -      -
    268C  GLU*     1.3    74.5    -      -       +      +
    270C  ILE*     1.3    60.9    +      -       +      +
    271C  LYS      3.0     4.3    -      -       -      -
    272C  SER*     2.8    26.4    +      -       -      -
    273C  MET*     3.5    12.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 270 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39C  ILE*     5.4     8.3    -      -       +      -
    158C  ALA      6.0     0.7    -      -       -      +
    161C  LYS*     4.8    23.3    -      -       +      +
    162C  ASN*     6.1     1.8    -      -       -      +
    266C  MET*     2.9    29.7    +      -       +      +
    267C  ASP*     3.1    30.5    -      -       +      +
    269C  VAL*     1.3    77.3    -      -       +      +
    271C  LYS*     1.3    63.0    +      -       +      +
    273C  MET*     4.0    25.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 271 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    267C  ASP*     2.9    20.0    +      -       -      +
    268C  GLU*     3.7    25.0    +      -       -      +
    270C  ILE*     1.3    81.9    -      -       +      +
    272C  SER*     1.3    55.0    +      -       -      +
    273C  MET      3.1    11.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 272 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268C  GLU      2.9    15.8    +      -       -      -
    269C  VAL*     2.8    11.3    +      -       -      -
    271C  LYS*     1.3    75.0    -      -       -      +
    273C  MET*     1.3    59.4    +      -       -      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il