Contacts of the helix formed by residues 246 - 269 (chain A) in PDB entry 4GV1


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 SER 246 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    245A  PHE*     1.3    76.7    -      -       -      +
    247A  GLU*     1.3    58.1    +      -       -      +
    248A  ASP*     3.7     7.9    +      -       -      +
    249A  ARG*     3.1    25.5    +      -       -      +
    250A  ALA*     2.9    28.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 247 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    245A  PHE      3.8     0.4    +      -       -      -
    246A  SER*     1.3    72.7    -      -       -      +
    248A  ASP*     1.3    59.6    +      -       -      +
    250A  ALA*     3.4     1.2    +      -       -      +
    251A  ARG*     2.8    40.4    +      -       -      +
    343A  MET*     3.8    25.6    -      -       +      -
    371A  THR      4.5     2.1    -      -       -      +
    372A  LEU*     3.5    11.1    -      -       +      +
    373A  GLY*     2.9    32.1    +      -       -      -
    375A  GLU*     5.3     2.9    -      -       -      +
    376A  ALA*     3.8    19.5    +      -       -      +
    407A  PHE*     4.0    11.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 248 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    246A  SER*     3.3     8.4    +      -       -      +
    247A  GLU*     1.3    79.2    -      -       -      +
    249A  ARG*     1.3    56.6    +      -       -      +
    251A  ARG*     2.8    35.4    +      -       -      +
    252A  PHE*     3.1    27.4    +      -       -      +
    424A  PRO*     5.5     2.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 249 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    238A  HIS*     4.4     7.5    -      -       -      +
    242A  GLU*     2.7    38.2    +      -       -      -
    245A  PHE*     3.6    33.9    -      -       +      +
    246A  SER*     3.1    22.3    +      -       -      +
    248A  ASP*     1.3    72.3    -      -       -      +
    250A  ALA*     1.3    66.0    +      -       -      +
    252A  PHE*     3.3     4.9    +      -       -      +
    253A  TYR*     3.1    57.5    +      -       +      -
    282A  LEU*     4.7     1.0    -      -       -      +
    424A  PRO*     3.6    31.6    -      -       +      +
    425A  PHE*     3.5    34.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 250 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    245A  PHE*     4.3     2.8    -      -       +      +
    246A  SER      2.9    13.1    +      -       -      +
    247A  GLU      3.7     2.5    -      -       -      +
    249A  ARG*     1.3    75.5    -      -       -      +
    251A  ARG*     1.3    53.4    +      -       -      +
    253A  TYR*     3.5     1.7    +      -       -      +
    254A  GLY*     2.8    33.8    +      -       -      -
    339A  MET*     3.9     8.1    -      -       +      +
    342A  MET*     4.0    29.8    -      -       +      +
    343A  MET*     3.4    38.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 251 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    247A  GLU*     2.8    27.7    +      -       -      +
    248A  ASP*     2.8    39.9    +      -       -      +
    250A  ALA*     1.3    70.6    -      -       -      +
    252A  PHE*     1.3    60.0    +      -       -      +
    254A  GLY      3.5     0.2    +      -       -      -
    255A  ALA*     2.9    30.2    +      -       -      +
    375A  GLU*     5.5     2.4    -      -       -      +
    407A  PHE*     2.8    69.2    +      -       +      +
    408A  PHE*     3.6    13.6    -      -       +      +
    409A  ALA      5.6     2.4    +      -       -      -
    411A  ILE*     4.2    24.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 252 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    248A  ASP      3.1    12.6    +      -       -      +
    249A  ARG      3.3     6.9    +      -       -      +
    251A  ARG*     1.3    74.9    -      -       -      +
    253A  TYR*     1.3    84.6    +      +       -      +
    255A  ALA*     3.3     6.1    +      -       -      +
    256A  GLU*     3.2    55.5    +      -       +      +
    286A  GLY      3.6    18.6    -      -       -      -
    287A  HIS*     3.6    11.0    -      -       -      -
    411A  ILE*     6.1     0.9    -      -       -      -
    421A  LEU*     3.8    39.9    -      -       +      -
    422A  SER      4.2     3.8    -      -       -      -
    423A  PRO*     3.6    21.1    -      -       +      -
    424A  PRO*     3.5    26.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 253 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    235A  LEU*     3.9    11.9    -      -       +      -
    245A  PHE*     3.6    29.4    -      +       -      -
    249A  ARG*     3.1    59.3    +      -       +      -
    250A  ALA      3.9     4.0    -      -       -      +
    252A  PHE*     1.3   105.8    -      +       -      +
    254A  GLY*     1.3    56.1    +      -       -      +
    256A  GLU*     3.2     4.0    +      -       -      +
    257A  ILE*     2.9    34.9    +      -       +      +
    282A  LEU*     3.6    27.0    -      -       +      +
    286A  GLY      3.9     4.0    +      -       -      -
    288A  ILE*     3.7    26.6    -      -       +      +
    342A  MET*     4.1    17.3    -      -       +      -
    424A  PRO*     4.8     2.9    -      -       +      +
    425A  PHE*     4.0     8.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 254 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    250A  ALA      2.8    21.0    +      -       -      -
    251A  ARG      3.7     1.3    -      -       -      -
    253A  TYR*     1.3    72.3    -      -       -      +
    255A  ALA*     1.3    56.4    +      -       -      +
    257A  ILE*     3.4    10.1    +      -       -      +
    258A  VAL*     2.9    37.3    +      -       -      +
    335A  LEU*     4.6     0.4    -      -       -      -
    339A  MET*     3.9    24.9    -      -       -      -
    342A  MET*     5.1     1.0    -      -       -      +
    408A  PHE*     4.2     4.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 255 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    251A  ARG      2.9    20.9    +      -       -      +
    252A  PHE*     3.7     6.7    -      -       -      +
    253A  TYR      3.3     0.2    -      -       -      -
    254A  GLY*     1.3    72.9    -      -       -      +
    256A  GLU*     1.3    58.2    +      -       +      +
    258A  VAL      3.3     0.7    +      -       -      -
    259A  SER*     2.9    26.3    +      -       -      -
    408A  PHE*     3.8     8.6    -      -       +      -
    411A  ILE*     4.6     8.7    -      -       +      -
    413A  TRP*     3.4    35.4    -      -       +      -
    416A  VAL*     3.8    18.1    -      -       +      +
    421A  LEU*     5.4     2.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 256 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    209A  PHE*     3.3    51.3    -      -       +      -
    252A  PHE*     3.2    30.6    +      -       +      +
    253A  TYR      3.2     8.1    +      -       -      +
    255A  ALA*     1.3    76.0    -      -       +      +
    257A  ILE*     1.3    61.8    +      -       -      +
    259A  SER      3.3     1.0    +      -       -      -
    260A  ALA*     3.1    19.9    +      -       -      +
    287A  HIS*     2.6    33.6    +      -       -      -
    288A  ILE*     2.9    41.9    +      -       +      +
    416A  VAL*     4.1     9.5    -      -       +      +
    419A  LYS*     5.1     0.2    -      -       -      -
    421A  LEU*     5.5     1.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 257 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    253A  TYR*     2.9    29.3    +      -       +      +
    254A  GLY*     3.7     6.3    -      -       -      +
    256A  GLU*     1.3    73.4    -      -       -      +
    258A  VAL*     1.3    60.0    +      -       -      +
    260A  ALA*     3.2     6.2    +      -       -      +
    261A  LEU*     2.9    50.1    +      -       +      +
    275A  LEU*     4.0    15.5    -      -       +      -
    280A  LEU*     3.8    38.8    -      -       +      -
    288A  ILE*     4.3    13.7    -      -       +      -
    290A  ILE*     4.7     4.5    -      -       +      -
    335A  LEU*     3.7    18.6    -      -       +      -
    338A  VAL*     4.6     1.8    -      -       +      -
    342A  MET*     4.1    15.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 258 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    254A  GLY      2.9    23.7    +      -       -      +
    255A  ALA      3.3     3.6    +      -       -      +
    257A  ILE*     1.3    75.1    -      -       -      +
    259A  SER*     1.3    54.5    +      -       -      +
    261A  LEU*     4.0     0.6    -      -       -      +
    262A  ASP*     2.8    36.9    +      -       -      +
    332A  TRP*     4.5    11.0    -      -       +      -
    335A  LEU*     3.5    30.1    -      -       +      -
    399A  ALA*     4.5    12.6    -      -       +      +
    402A  ILE*     4.0    14.6    -      -       +      -
    403A  MET*     3.7    33.2    -      -       +      -
    408A  PHE*     4.7     6.3    -      -       +      -
    413A  TRP*     3.9     9.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 259 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    207A  HIS*     3.3    22.8    +      -       -      -
    209A  PHE*     4.1     7.1    -      -       -      -
    255A  ALA      2.9    14.5    +      -       -      -
    256A  GLU      3.4    10.1    -      -       -      -
    257A  ILE      3.3     0.2    -      -       -      -
    258A  VAL*     1.3    78.3    -      -       -      +
    260A  ALA*     1.3    61.1    +      -       -      +
    262A  ASP*     3.6     6.5    +      -       -      +
    263A  TYR*     3.2    17.8    +      -       -      +
    403A  MET*     6.3     0.7    -      -       -      -
    413A  TRP*     5.0     8.4    +      -       -      -
    416A  VAL*     4.0    15.3    -      -       -      -
    417A  TYR*     4.2    14.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 260 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    207A  HIS*     3.5    19.4    -      -       +      -
    209A  PHE*     4.1     8.3    -      -       +      -
    210A  LEU*     4.0    14.3    -      -       +      +
    256A  GLU      3.1    13.6    +      -       -      +
    257A  ILE      3.6     7.4    -      -       -      +
    259A  SER*     1.3    75.2    -      -       -      +
    261A  LEU*     1.3    58.4    +      -       -      +
    263A  TYR*     3.3     6.1    +      -       -      +
    264A  LEU*     3.0    31.9    +      -       -      +
    290A  ILE*     3.8    24.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 261 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    257A  ILE*     2.9    39.1    +      -       +      +
    260A  ALA*     1.3    73.6    -      -       -      +
    262A  ASP*     1.3    60.7    +      -       -      +
    264A  LEU*     3.3     8.8    +      -       +      +
    265A  HIS*     2.9    38.0    +      -       +      +
    272A  TYR*     3.9    30.5    -      -       +      -
    275A  LEU*     4.4    15.7    -      -       +      -
    290A  ILE*     4.9     5.6    -      -       +      -
    331A  ASP*     3.9    26.7    -      -       +      +
    332A  TRP*     3.5    39.0    -      -       +      -
    335A  LEU*     4.8     1.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 262 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    258A  VAL      2.8    22.4    +      -       -      +
    259A  SER*     3.6     7.3    -      -       -      +
    261A  LEU*     1.3    73.1    -      -       -      +
    263A  TYR*     1.3    52.6    +      -       -      +
    265A  HIS*     4.7     2.9    -      -       -      -
    266A  SER*     2.8    51.1    +      -       -      -
    332A  TRP*     4.3     1.6    -      -       -      -
    398A  ASP*     5.2     1.1    -      -       -      +
    399A  ALA*     3.5    27.0    -      -       +      +
    400A  LYS*     2.7    37.1    +      -       -      -
    403A  MET*     4.2    13.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 263 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    204A  ASN      4.1     0.2    +      -       -      -
    205A  SER*     3.5     2.3    -      -       -      -
    206A  ARG*     3.0    37.5    +      -       -      +
    207A  HIS*     3.4    35.9    -      +       +      +
    210A  LEU*     3.9    24.7    -      -       +      -
    259A  SER      3.2     5.3    +      -       -      +
    260A  ALA      3.4     7.6    -      -       -      +
    261A  LEU      3.3     0.2    -      -       -      -
    262A  ASP*     1.3    78.9    -      -       -      +
    264A  LEU*     1.3    65.5    +      -       +      +
    266A  SER*     5.0     0.2    -      -       -      -
    267A  GLU*     2.8    73.1    +      -       +      +
    268A  LYS*     3.3    40.0    +      -       +      -
    417A  TYR*     5.8     2.0    -      +       -      -
----------------------------------------------------------
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Residues in contact with LEU 264 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    201A  VAL*     4.9     8.1    -      -       +      -
    205A  SER*     4.9     6.1    -      -       -      -
    210A  LEU*     3.9    35.4    -      -       +      -
    260A  ALA      3.0    17.8    +      -       -      +
    261A  LEU*     3.3    14.8    +      -       +      +
    263A  TYR*     1.3    87.1    -      -       +      +
    265A  HIS*     1.3    58.5    +      -       +      +
    268A  LYS*     3.3    11.4    +      -       +      -
    269A  ASN      2.9    12.0    +      -       -      -
    270A  VAL*     2.9    54.1    +      -       +      +
    272A  TYR*     4.4    30.3    -      -       +      +
    290A  ILE*     5.8     0.7    -      -       +      -
    293A  PHE*     4.6     4.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 265 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    261A  LEU*     2.9    23.5    +      -       -      +
    262A  ASP      3.9     2.7    -      -       -      +
    264A  LEU*     1.3    74.7    -      -       +      +
    266A  SER*     1.3    63.1    +      -       -      +
    269A  ASN*     3.3    24.6    +      -       -      +
    270A  VAL      3.2    23.8    -      -       -      +
    271A  VAL*     4.3     2.4    -      -       +      -
    300A  ILE      4.5     2.9    -      -       -      +
    302A  ASP      5.9     0.5    +      -       -      -
    328A  ARG*     3.4    46.1    +      -       +      +
    331A  ASP*     2.7    29.5    +      -       +      +
    332A  TRP*     3.6    26.8    -      +       -      -
    398A  ASP*     2.7    34.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 266 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    262A  ASP*     2.8    40.3    +      -       -      -
    265A  HIS*     1.3    76.9    -      -       -      +
    267A  GLU*     1.3    66.0    +      -       -      +
    269A  ASN*     4.4     6.3    -      -       -      +
    328A  ARG*     5.9     2.3    +      -       -      +
    398A  ASP*     4.8     4.7    +      -       -      +
    400A  LYS*     3.3    12.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 267 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    263A  TYR*     2.8    51.4    +      -       +      +
    266A  SER*     1.3    81.6    -      -       -      +
    268A  LYS*     1.3    71.7    +      -       +      +
    269A  ASN*     3.8     2.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 268 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    204A  ASN*     2.8    56.6    +      -       +      +
    205A  SER*     4.8     2.2    -      -       -      -
    263A  TYR*     3.3    40.5    +      -       +      +
    264A  LEU*     3.3    19.6    +      -       +      +
    267A  GLU*     1.3    90.1    +      -       -      +
    269A  ASN*     1.3    72.1    +      -       -      +
    270A  VAL*     3.3    20.1    +      -       +      +
    298A  GLU*     5.8     0.3    -      -       -      +
    299A  GLY      4.9     1.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 269 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    264A  LEU      2.9     3.8    +      -       -      -
    265A  HIS*     3.3    16.0    +      -       -      +
    266A  SER      4.4     7.3    -      -       -      +
    267A  GLU      5.4     2.1    +      -       -      -
    268A  LYS*     1.3    79.1    -      -       -      +
    270A  VAL*     1.3    58.3    +      -       -      +
    297A  LYS      3.7     0.2    -      -       -      +
    298A  GLU*     3.6     0.7    -      -       -      -
    299A  GLY*     3.0    17.3    +      -       -      -
    300A  ILE*     2.9    47.8    +      -       -      +
    301A  LYS*     3.8    43.8    +      -       -      +
    302A  ASP      5.0     0.5    +      -       -      -
----------------------------------------------------------
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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