Contacts of the helix formed by residues 316 - 340 (chain A) in PDB entry 4O6M


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 LEU 316 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    311A  CYS*     2.8    27.0    +      -       +      +
    314A  VAL*     3.7    22.7    -      -       +      +
    315A  ASN*     1.3    86.1    -      -       -      +
    317A  PRO*     1.3    65.8    -      -       -      +
    318A  SER*     3.0    12.6    -      -       -      +
    319A  LEU*     2.9    34.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with PRO 317 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    192A  PHE*     4.4    11.9    -      -       +      -
    200A  THR*     4.1    19.5    -      -       +      +
    250A  ILE*     3.8    25.3    -      -       +      +
    254A  LEU*     5.2     9.2    -      -       +      -
    311A  CYS*     3.9     9.1    -      -       +      +
    312A  SER*     4.2    15.7    -      -       -      +
    315A  ASN*     3.2    13.7    -      -       -      +
    316A  LEU*     1.3    88.7    -      -       -      +
    318A  SER*     1.3    61.3    +      -       -      +
    320A  ALA*     3.1    20.2    +      -       +      +
    321A  LEU*     3.3    10.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 318 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    254A  LEU*     3.4    34.4    -      -       -      +
    261A  TYR*     3.6    28.2    +      -       -      -
    316A  LEU*     3.0    14.1    +      -       -      +
    317A  PRO*     1.3    81.7    -      -       -      +
    319A  LEU*     1.3    63.9    +      -       -      +
    321A  LEU*     3.2     7.3    +      -       -      +
    322A  VAL*     3.2    25.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 319 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    311A  CYS*     3.9    14.6    -      -       -      -
    314A  VAL*     6.2     1.3    -      -       +      -
    316A  LEU*     2.9    34.7    +      -       +      +
    318A  SER*     1.3    78.2    +      -       -      +
    320A  ALA*     1.3    61.3    +      -       -      +
    322A  VAL*     3.2    14.3    +      -       +      +
    323A  ILE*     2.9    56.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 320 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    250A  ILE*     5.7     1.1    -      -       +      -
    307A  ILE*     3.9     9.2    -      -       +      +
    308A  ILE*     3.8    33.0    -      -       +      -
    311A  CYS*     3.6    24.7    -      -       +      -
    316A  LEU      3.6     1.8    +      -       -      -
    317A  PRO*     3.1    14.0    +      -       +      +
    319A  LEU*     1.3    78.9    -      -       -      +
    321A  LEU*     1.3    57.8    +      -       +      +
    323A  ILE*     3.8     0.9    -      -       -      +
    324A  ILE*     2.9    37.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 321 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    247A  VAL*     4.0    30.7    -      -       +      -
    250A  ILE*     3.8    32.3    -      -       +      -
    251A  THR*     3.6    21.5    -      -       -      +
    254A  LEU*     3.9    15.7    -      -       +      -
    261A  TYR*     4.9     7.6    -      -       +      +
    264A  ILE*     3.9    11.7    -      -       +      -
    265A  GLY*     4.2     9.4    -      -       -      +
    268A  ALA*     3.6    12.8    -      -       +      +
    308A  ILE*     6.0     1.6    -      -       +      -
    317A  PRO      3.3    10.7    +      -       -      +
    318A  SER      3.2     7.2    +      -       -      +
    320A  ALA*     1.3    77.6    -      -       +      +
    322A  VAL*     1.3    60.2    +      -       -      +
    324A  ILE*     4.7     3.1    -      -       +      -
    325A  ALA*     2.8    33.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 322 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    261A  TYR*     5.0     4.9    -      -       +      -
    264A  ILE*     4.0    31.2    -      -       +      -
    318A  SER      3.2    14.4    +      -       -      +
    319A  LEU*     3.2    18.6    +      -       +      +
    321A  LEU*     1.3    76.8    -      -       -      +
    323A  ILE*     1.3    59.9    +      -       +      +
    325A  ALA*     3.7     1.3    -      -       -      +
    326A  LEU*     2.9    50.2    +      -       +      +
    407A  MPG      4.6     7.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 323 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    307A  ILE*     3.9    39.7    -      -       +      -
    311A  CYS*     4.3     5.8    -      -       -      -
    319A  LEU*     2.9    45.9    +      -       +      +
    320A  ALA      3.8     3.4    -      -       -      +
    322A  VAL*     1.3    78.2    -      -       +      +
    324A  ILE*     1.3    57.1    +      -       -      +
    326A  LEU*     4.7     4.7    -      -       +      -
    327A  LEU*     2.9    50.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 324 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    247A  VAL*     5.5     5.4    -      -       +      -
    268A  ALA*     3.7    16.8    -      -       +      +
    271A  ALA*     3.7     5.6    -      -       +      +
    272A  SER*     3.5    24.0    -      -       -      +
    299A  ILE*     4.3    19.5    -      -       +      -
    304A  ARG*     3.9    30.7    -      -       +      +
    307A  ILE*     4.6     7.6    -      -       +      -
    308A  ILE*     3.9    34.3    -      -       +      -
    320A  ALA      2.9    21.3    +      -       -      +
    321A  LEU*     4.1     4.3    -      -       +      +
    323A  ILE*     1.3    75.5    -      -       -      +
    325A  ALA*     1.3    59.9    +      -       -      +
    328A  GLY*     2.8    28.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 325 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    264A  ILE*     4.0     7.0    -      -       +      +
    267A  LEU*     4.0    13.9    -      -       +      -
    268A  ALA*     3.8    24.4    -      -       -      +
    321A  LEU      2.8    19.2    +      -       -      +
    322A  VAL      3.7     3.8    -      -       -      +
    324A  ILE*     1.3    76.9    -      -       -      +
    326A  LEU*     1.3    60.5    +      -       -      +
    329A  ASN*     2.9    34.9    +      -       -      +
    407A  MPG      4.0    16.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 326 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    322A  VAL*     2.9    39.2    +      -       +      +
    323A  ILE*     3.9     4.3    -      -       +      +
    325A  ALA*     1.3    76.0    -      -       -      +
    327A  LEU*     1.3    75.4    +      -       +      +
    329A  ASN*     4.2     0.3    -      -       -      +
    330A  PHE*     3.1    45.3    +      -       +      -
    407A  MPG      3.7    35.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 327 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    297A  ILE*     3.7    28.8    -      -       +      +
    298A  PRO*     4.6    10.1    -      -       +      +
    299A  ILE*     3.9    19.3    -      -       +      -
    307A  ILE*     4.9     3.4    -      -       +      -
    323A  ILE*     2.9    41.8    +      -       +      +
    326A  LEU*     1.3    83.4    -      -       +      +
    328A  GLY*     1.3    57.9    +      -       -      +
    330A  PHE*     3.9     2.9    -      -       -      +
    331A  GLU*     2.9    31.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 328 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    271A  ALA*     3.8    14.8    -      -       -      +
    275A  ILE*     3.6    12.1    -      -       -      +
    299A  ILE*     3.8    20.0    -      -       -      +
    304A  ARG*     6.3     0.2    -      -       -      -
    324A  ILE*     2.8    23.9    +      -       -      -
    327A  LEU*     1.3    74.9    -      -       -      +
    329A  ASN*     1.3    54.5    +      -       -      +
    331A  GLU      3.4     0.7    +      -       -      -
    332A  ALA*     3.0    28.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 329 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    267A  LEU*     3.3    40.2    +      -       -      +
    270A  PHE*     3.5    27.0    -      -       -      -
    271A  ALA*     3.7     5.0    -      -       -      +
    325A  ALA*     2.9    27.4    +      -       -      +
    326A  LEU      4.2     0.2    -      -       -      +
    328A  GLY*     1.3    73.4    -      -       -      +
    330A  PHE*     1.3    65.2    +      -       -      +
    332A  ALA*     3.5     4.8    +      -       -      +
    333A  LEU*     3.2    22.3    +      -       -      +
    407A  MPG      4.0    26.9    -      -       +      +
    241B  TYR*     4.5     7.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 330 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    297A  ILE*     3.8    18.6    -      -       +      +
    326A  LEU*     3.1    45.4    +      -       +      +
    327A  LEU*     4.8     0.7    -      -       -      -
    329A  ASN*     1.3    75.7    -      -       -      +
    331A  GLU*     1.3    57.8    +      -       -      +
    333A  LEU*     3.3    20.5    +      -       +      +
    334A  ARG*     2.8    28.2    +      -       -      +
    407A  MPG      3.7    27.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 331 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    275A  ILE*     3.5    20.2    -      -       +      -
    290A  TYR*     5.3     0.2    -      -       -      -
    296A  ALA*     3.9     4.2    -      -       -      +
    297A  ILE*     2.9    34.4    +      -       +      +
    299A  ILE*     3.7    18.6    -      -       +      -
    327A  LEU      2.9    19.4    +      -       -      +
    330A  PHE*     1.3    73.2    -      -       -      +
    332A  ALA*     1.3    65.3    +      -       -      +
    334A  ARG*     2.9    43.5    +      -       -      -
    335A  ARG*     2.9    48.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 332 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    270A  PHE*     6.1     0.2    -      -       +      -
    271A  ALA*     6.2     0.2    -      -       -      -
    274A  MET*     4.6    17.0    -      -       +      -
    275A  ILE*     4.0    10.3    -      -       +      +
    278A  THR*     4.9    11.9    -      -       +      +
    328A  GLY      3.0    17.1    +      -       -      +
    329A  ASN*     3.8     5.6    -      -       -      +
    330A  PHE      3.3     0.2    -      -       -      -
    331A  GLU*     1.3    75.3    -      -       -      +
    333A  LEU*     1.3    63.1    +      -       -      +
    335A  ARG*     3.2    11.6    +      -       -      +
    336A  ILE*     3.1    25.2    +      -       -      +
    241B  TYR*     3.3    22.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 333 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    329A  ASN      3.2    10.7    +      -       -      +
    330A  PHE*     3.5    26.9    -      -       +      +
    332A  ALA*     1.3    76.8    -      -       -      +
    334A  ARG*     1.3    65.1    +      -       -      +
    336A  ILE*     3.2    22.1    +      -       +      +
    337A  VAL*     3.1    34.3    +      -       +      +
    407A  MPG      6.4     2.0    -      -       +      -
    241B  TYR*     4.2     3.2    +      -       -      +
    407B  MPG      5.6     4.3    -      -       +      -
    412B  MPG      5.1    13.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 334 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    290A  TYR*     3.7    13.5    +      -       -      -
    292A  PRO*     4.3     0.6    -      -       -      +
    295A  PHE*     3.5    36.1    +      -       -      -
    296A  ALA*     3.4    15.7    -      -       -      +
    297A  ILE*     5.0     5.4    -      -       +      -
    330A  PHE      2.8    20.3    +      -       -      +
    331A  GLU*     2.9    43.9    +      -       -      +
    333A  LEU*     1.3    73.3    -      -       -      +
    335A  ARG*     1.3    61.0    +      -       -      +
    337A  VAL*     3.2     7.2    +      -       +      +
    338A  ALA*     2.8    45.2    +      -       +      +
    413A  SO4      2.7    31.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 335 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    275A  ILE*     3.0    35.4    +      -       -      +
    278A  THR*     2.9    30.8    +      -       -      -
    279A  GLY*     3.8     8.9    -      -       -      +
    290A  TYR*     3.3    46.6    +      -       -      +
    297A  ILE      5.7     0.6    +      -       -      -
    299A  ILE*     6.0     0.2    -      -       -      +
    300A  THR*     4.0    17.6    -      -       -      +
    331A  GLU*     2.9    44.9    +      -       -      +
    332A  ALA*     3.2     9.4    +      -       -      +
    334A  ARG*     1.3    78.1    -      -       -      +
    336A  ILE*     1.3    63.4    +      -       -      +
    338A  ALA*     4.5     5.2    -      -       -      -
    339A  LEU*     3.0    33.8    +      -       +      +
    411A  SO4      5.4     0.8    +      -       -      -
    233B  TRP*     4.0    12.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 336 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    278A  THR*     5.5     0.7    -      -       +      -
    332A  ALA      3.1    15.4    +      -       -      +
    333A  LEU*     3.4    18.4    -      -       +      +
    335A  ARG*     1.3    78.4    -      -       -      +
    337A  VAL*     1.3    66.5    +      -       +      +
    339A  LEU      3.7     4.3    +      -       -      -
    230B  TYR*     3.0    34.9    +      -       -      +
    233B  TRP*     3.7    21.5    -      -       +      -
    234B  LEU*     4.0     8.7    -      -       +      -
    237B  VAL*     4.0    21.5    -      -       +      -
    238B  LEU*     4.6    10.8    -      -       +      -
    241B  TYR*     4.0    20.6    -      -       +      +
    407B  MPG      3.9    27.6    -      -       +      -
    412B  MPG      5.0     6.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 337 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    333A  LEU*     3.1    27.6    +      -       +      +
    334A  ARG*     3.7     7.9    -      -       -      +
    336A  ILE*     1.3    81.1    -      -       +      +
    338A  ALA*     1.3    63.6    +      -       -      +
    340A  ARG*     3.3    20.9    +      -       -      +
    341A  SER*     4.5     2.3    +      -       -      -
    407B  MPG      6.1     5.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 338 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    290A  TYR*     6.2     0.2    -      -       -      +
    334A  ARG*     2.8    36.1    +      -       +      +
    335A  ARG*     4.0     3.6    -      -       -      +
    337A  VAL*     1.3    75.0    -      -       -      +
    339A  LEU*     1.3    59.3    +      -       +      +
    341A  SER*     3.0    24.1    +      -       -      -
    342A  TYR*     3.4     8.0    +      -       -      +
    413A  SO4      3.5    32.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 339 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    278A  THR      5.5     0.2    -      -       -      +
    282A  PHE*     3.5    38.8    -      -       +      -
    286A  TYR*     4.1     6.0    +      -       +      +
    290A  TYR*     4.6    16.8    -      -       +      +
    335A  ARG*     3.0    17.3    +      -       +      +
    337A  VAL      3.3     0.2    -      -       -      -
    338A  ALA*     1.3    73.0    -      -       -      +
    340A  ARG*     1.3    62.7    +      -       -      +
    341A  SER      2.9     8.9    +      -       -      -
    342A  TYR*     3.2    37.3    +      -       +      +
    413A  SO4      4.6     6.5    -      -       -      +
    230B  TYR*     3.5    25.8    -      -       +      +
    233B  TRP*     3.5    42.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 340 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    336A  ILE      3.7     1.1    +      -       -      +
    337A  VAL*     3.3    16.3    +      -       -      +
    338A  ALA      3.2     0.6    -      -       -      -
    339A  LEU*     1.3    78.3    -      -       -      +
    341A  SER*     1.3    56.6    +      -       -      +
    230B  TYR*     3.5    36.5    -      -       +      +
    407B  MPG      5.0     8.1    -      -       +      -
----------------------------------------------------------
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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