Contacts of the helix formed by residues 260 - 285 (chain E) in PDB entry 2GPV


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 260 (chain E).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    257E  VAL*     5.4     1.0    -      -       -      +
    258E  PRO      3.6     7.8    +      -       -      -
    259E  ASP*     1.3    78.1    -      -       -      +
    261E  ASP*     1.3    72.7    +      -       -      +
    262E  ILE*     3.6     8.3    +      -       -      +
    263E  LYS*     3.5    18.9    +      -       -      +
    264E  ALA*     3.4    21.7    +      -       -      +
    339E  LEU*     4.4    10.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 261 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260E  SER*     1.3    75.5    -      -       -      +
    262E  ILE*     1.3    99.2    +      -       +      +
    264E  ALA*     3.5     2.3    +      -       -      +
    265E  LEU*     3.1    30.9    +      -       +      +
    339E  LEU*     3.4    24.1    +      -       -      +
    340E  ALA*     4.3    11.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 262 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260E  SER*     3.3     7.7    +      -       -      +
    261E  ASP*     1.3    96.9    +      -       -      +
    263E  LYS*     1.3    52.3    +      -       -      +
    265E  LEU*     3.1    12.4    +      -       +      +
    266E  THR*     2.6    48.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 263 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    253E  PRO*     4.2    19.2    -      -       -      +
    254E  ASP      3.2    27.1    +      -       -      +
    255E  PRO*     4.6     5.3    +      -       -      +
    257E  VAL*     3.0    42.7    +      -       +      +
    258E  PRO      3.7     8.5    -      -       -      +
    259E  ASP*     3.4    24.3    +      -       -      -
    260E  SER*     3.5    17.6    +      -       -      +
    261E  ASP      3.5     0.2    -      -       -      -
    262E  ILE*     1.3    79.3    -      -       -      +
    264E  ALA*     1.3    52.2    +      -       -      +
    266E  THR*     3.1     9.2    +      -       +      -
    267E  THR*     2.6    48.2    +      -       -      +
    330E  TYR*     6.3     1.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 264 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260E  SER      3.4    12.4    +      -       -      +
    261E  ASP      3.7     7.9    -      -       -      +
    262E  ILE      3.3     0.6    -      -       -      -
    263E  LYS*     1.3    77.6    -      -       -      +
    265E  LEU*     1.3    59.3    +      -       -      +
    267E  THR*     3.3     2.3    +      -       -      -
    268E  LEU*     3.0    37.5    +      -       +      +
    330E  TYR*     3.5    24.2    -      -       -      +
    332E  MET*     4.9     4.0    -      -       +      -
    336E  GLN      5.7     0.4    -      -       -      +
    340E  ALA*     3.9    25.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 265 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    261E  ASP*     3.2    20.9    -      -       +      +
    262E  ILE*     3.1    13.7    +      -       +      +
    264E  ALA*     1.3    78.1    -      -       -      +
    266E  THR*     1.3    57.8    +      -       -      +
    268E  LEU*     3.9     4.2    -      -       -      +
    269E  CYS*     2.9    39.7    +      -       -      -
    340E  ALA*     3.8    23.8    -      -       +      +
    342E  LEU*     4.0    24.7    -      -       +      -
    434E  HIS*     6.2     0.4    -      -       -      +
    438E  ILE*     3.9    32.3    -      -       +      -
    504E  OHT      4.0    18.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 266 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    262E  ILE*     2.6    40.2    +      -       -      +
    263E  LYS*     3.3    12.9    -      -       +      -
    265E  LEU*     1.3    73.9    -      -       -      +
    267E  THR*     1.3    63.8    +      -       -      +
    269E  CYS*     3.4     7.0    +      -       -      +
    270E  ASP*     3.1    24.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 267 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    251E  ALA*     3.7    38.8    -      -       +      +
    253E  PRO*     4.1    21.9    -      -       +      +
    254E  ASP      5.4     0.2    +      -       -      -
    263E  LYS*     2.6    40.2    +      -       -      +
    264E  ALA*     3.7     6.0    -      -       -      -
    266E  THR*     1.3    74.9    -      -       -      +
    268E  LEU*     1.3    57.1    +      -       -      +
    270E  ASP*     3.5     6.4    +      -       -      +
    271E  LEU*     3.1    26.2    +      -       -      +
    330E  TYR*     4.6    15.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 268 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    264E  ALA      3.0    23.8    +      -       -      +
    265E  LEU*     3.9     4.5    -      -       -      +
    266E  THR      3.3     0.2    -      -       -      -
    267E  THR*     1.3    74.1    -      -       -      +
    269E  CYS*     1.3    61.1    +      -       -      +
    271E  LEU*     3.8     5.8    -      -       +      +
    272E  ALA*     3.0    29.8    +      -       -      +
    326E  TYR*     3.8    36.8    -      -       +      -
    330E  TYR*     3.9    17.3    -      -       +      -
    332E  MET*     4.2    13.5    -      -       -      -
    342E  LEU*     3.9    28.3    -      -       +      -
    504E  OHT      3.6    42.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 269 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    265E  LEU*     2.9    31.1    +      -       -      +
    266E  THR*     3.6     7.0    -      -       -      +
    267E  THR      3.4     0.2    -      -       -      -
    268E  LEU*     1.3    74.6    -      -       -      +
    270E  ASP*     1.3    63.9    +      -       -      +
    272E  ALA*     4.0     0.9    -      -       -      +
    273E  ASP*     3.1    34.7    +      -       -      +
    435E  PHE*     4.3    17.7    -      -       -      -
    504E  OHT      4.0    35.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 270 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    251E  ALA      4.7     4.5    -      -       -      +
    266E  THR*     3.1    18.6    +      -       +      +
    267E  THR*     3.7     7.9    -      -       -      +
    269E  CYS*     1.3    77.1    -      -       -      +
    271E  LEU*     1.3    60.5    +      -       -      +
    273E  ASP*     3.8     9.1    -      -       -      +
    274E  ARG*     3.3    50.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 271 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    249E  ILE*     3.8    33.0    -      -       +      +
    250E  TYR      3.9    20.2    -      -       -      +
    251E  ALA*     4.1    10.3    -      -       +      +
    267E  THR      3.1    17.1    +      -       -      +
    268E  LEU*     3.8     9.6    -      -       +      +
    269E  CYS      3.2     0.2    -      -       -      -
    270E  ASP*     1.3    75.8    -      -       -      +
    272E  ALA*     1.3    55.5    +      -       -      +
    274E  ARG*     3.2     8.2    +      -       -      +
    275E  GLU*     2.8    49.3    +      -       +      +
    326E  TYR*     3.5    41.1    -      -       +      +
    327E  ALA*     4.5     2.7    -      -       +      -
    504E  OHT      3.9    13.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 272 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268E  LEU      3.0    15.7    +      -       -      +
    271E  LEU*     1.3    75.0    -      -       -      +
    273E  ASP*     1.3    54.5    +      -       -      +
    275E  GLU*     3.1     7.4    +      -       -      +
    276E  LEU*     2.6    42.1    +      -       +      +
    309E  LEU*     4.0    11.4    -      -       +      -
    504E  OHT      3.3    52.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 273 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    269E  CYS*     3.1    27.6    +      -       -      +
    270E  ASP*     3.8    10.9    -      -       -      +
    272E  ALA*     1.3    77.7    -      -       -      +
    274E  ARG*     1.3    63.0    +      -       +      +
    276E  LEU*     3.3    16.0    +      -       -      +
    277E  VAL*     3.3    18.9    +      -       -      +
    504E  OHT      3.1    34.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 274 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    249E  ILE*     3.4    32.5    -      -       +      +
    250E  TYR      2.9    30.5    +      -       -      +
    251E  ALA*     3.9    10.7    +      -       -      +
    252E  MET*     4.5    15.1    -      -       -      +
    270E  ASP*     3.3    43.6    +      -       -      +
    271E  LEU*     3.2    15.0    +      -       -      +
    273E  ASP*     1.3    79.3    -      -       +      +
    275E  GLU*     1.3    65.6    +      -       -      +
    277E  VAL*     3.5    15.6    +      -       +      +
    278E  VAL*     3.6    13.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 275 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    249E  ILE*     4.3    15.7    -      -       +      -
    271E  LEU*     2.8    34.3    +      -       +      +
    272E  ALA      3.5     3.8    -      -       -      +
    274E  ARG*     1.3    76.3    -      -       -      +
    276E  LEU*     1.3    54.2    +      -       -      +
    278E  VAL*     2.8    13.7    -      -       +      +
    279E  ILE*     2.7    41.0    +      -       +      +
    309E  LEU*     3.7    17.8    -      -       +      +
    312E  GLY*     5.7     0.5    -      -       -      -
    316E  ARG*     3.8    23.9    +      -       -      -
    326E  TYR      5.2     0.7    -      -       -      -
    504E  OHT      2.7    36.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 276 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    446A  MET*     4.3    17.0    -      -       +      -
    450A  PHE*     4.8    11.4    -      -       +      -
    453A  MET*     4.8     0.9    -      -       +      -
    272E  ALA      2.6    24.5    +      -       -      +
    273E  ASP*     3.5    10.5    -      -       -      +
    275E  GLU*     1.3    73.4    -      -       -      +
    277E  VAL*     1.3    55.6    +      -       +      +
    279E  ILE*     3.6    14.0    -      -       +      +
    280E  ILE*     2.9    43.0    +      -       +      +
    305E  TRP*     3.8    50.9    -      -       +      -
    309E  LEU*     4.1    15.0    -      -       +      -
    504E  OHT      4.7     9.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 277 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    453A  MET*     3.8    37.4    -      -       +      +
    273E  ASP      3.3    15.4    +      -       -      +
    274E  ARG*     3.8    11.7    -      -       +      +
    275E  GLU      3.2     0.4    -      -       -      -
    276E  LEU*     1.3    79.2    -      -       +      +
    278E  VAL*     1.3    63.1    +      -       +      +
    280E  ILE*     3.5     3.1    +      -       -      +
    281E  GLY*     3.2    17.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 278 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    246E  PRO*     4.1    27.6    -      -       +      +
    247E  GLU      5.7     0.2    -      -       -      +
    249E  ILE*     3.6    35.0    -      -       +      -
    274E  ARG      3.6     3.8    +      -       -      +
    275E  GLU*     2.8    25.3    +      -       +      +
    277E  VAL*     1.3    76.8    -      -       +      +
    279E  ILE*     1.3    63.1    +      -       +      +
    281E  GLY*     3.4     3.1    +      -       -      +
    282E  TRP*     2.9    27.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 279 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    246E  PRO*     5.4     3.1    -      -       +      -
    275E  GLU*     2.7    24.5    +      -       +      +
    276E  LEU*     3.6    17.0    -      -       +      +
    277E  VAL      3.3     0.2    -      -       -      -
    278E  VAL*     1.3    79.4    -      -       +      +
    280E  ILE*     1.3    68.9    +      -       +      +
    282E  TRP*     3.0    25.8    +      -       +      +
    283E  ALA*     3.1    11.6    +      -       -      +
    301E  LEU*     4.7    14.6    -      -       +      -
    305E  TRP*     4.9     3.8    -      -       +      +
    308E  ILE*     3.6    39.0    -      -       +      +
    309E  LEU*     3.5    34.8    -      -       +      +
    370E  LYS*     6.3     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 280 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    450A  PHE*     3.4    37.2    -      -       +      -
    453A  MET*     3.0    56.8    -      -       +      -
    454A  LEU*     4.0    24.5    -      -       +      +
    276E  LEU*     2.9    22.9    +      -       +      +
    277E  VAL      3.8     3.8    -      -       -      +
    279E  ILE*     1.3    80.5    -      -       +      +
    281E  GLY*     1.3    62.0    +      -       -      +
    282E  TRP      3.2     0.5    +      -       -      -
    283E  ALA*     3.3    12.2    +      -       -      +
    284E  LYS*     3.6    13.0    +      -       -      +
    301E  LEU*     4.3    19.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 281 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    453A  MET*     5.4     1.7    -      -       -      +
    277E  VAL      3.2    11.6    +      -       -      -
    278E  VAL*     3.4     4.5    +      -       -      -
    280E  ILE*     1.3    80.4    -      -       -      +
    282E  TRP*     1.3    61.2    +      -       -      +
    284E  LYS*     3.6    21.2    +      -       -      +
    285E  HIS*     3.6    18.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 282 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    241E  LEU*     4.7    10.5    +      -       +      +
    244E  ALA*     3.5    36.0    -      -       +      +
    245E  GLU*     4.2    10.3    +      -       -      -
    246E  PRO*     4.0    16.6    -      -       +      -
    278E  VAL      2.9    14.4    +      -       -      +
    279E  ILE*     3.0    26.2    +      -       +      +
    281E  GLY*     1.3    74.7    -      -       -      +
    283E  ALA*     1.3    71.4    +      -       +      +
    285E  HIS*     2.8    32.1    +      -       -      +
    286E  ILE*     3.5    32.9    +      -       +      +
    308E  ILE*     4.0    26.5    -      -       +      -
    367E  VAL*     4.4     6.0    -      -       +      +
    370E  LYS*     3.8    50.0    -      -       +      -
    371E  ALA*     4.1     5.6    -      -       +      -
    374E  LEU*     4.0     6.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 283 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    279E  ILE      3.1    10.3    +      -       -      +
    280E  ILE      3.3     8.2    +      -       -      +
    282E  TRP*     1.3    83.1    -      -       +      +
    284E  LYS*     1.3    64.1    +      -       -      +
    286E  ILE*     3.0    18.5    +      -       -      +
    289E  PHE*     3.2    43.3    -      -       +      +
    301E  LEU*     4.1    10.3    -      -       +      -
    374E  LEU*     3.6    21.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 284 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    453A  MET*     3.4    28.1    +      -       -      -
    454A  LEU*     3.8    38.3    -      -       +      +
    455A  GLU      6.0     0.6    +      -       -      -
    280E  ILE*     3.6     7.2    +      -       -      +
    281E  GLY*     3.6    16.0    -      -       -      +
    282E  TRP      3.2     0.8    -      -       -      -
    283E  ALA*     1.3    78.1    -      -       -      +
    285E  HIS*     1.3    64.9    +      -       +      +
    286E  ILE      3.3     6.3    +      -       -      +
    289E  PHE*     3.9     3.8    -      -       +      -
    290E  SER*     2.9    31.8    +      -       -      +
    297E  GLN*     5.1     2.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 285 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    240E  HIS*     3.2    34.0    +      -       -      +
    241E  LEU*     5.0     1.3    -      -       -      +
    244E  ALA*     3.8    29.1    -      -       +      +
    281E  GLY      3.6    19.9    +      -       -      -
    282E  TRP*     2.8    17.9    +      -       -      +
    284E  LYS*     1.3    75.5    +      -       +      +
    286E  ILE*     1.3    65.0    +      -       -      +
    287E  PRO*     3.6     0.3    -      -       -      +
----------------------------------------------------------
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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