Contacts of the helix formed by residues 496 - 523 (chain D) in PDB entry 2HVH


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 ASP 496 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    495D  VAL*     1.3    71.5    -      -       -      +
    497D  THR*     1.3    63.5    +      -       -      +
    498D  LYS*     3.4     8.7    +      -       -      +
    499D  ARG*     3.4    32.9    +      -       -      +
    500D  LEU*     3.2    19.1    +      -       -      +
    600D  LYS*     5.7     0.9    -      -       -      -
    638D  GLN      5.0     0.3    -      -       -      +
    639D  ALA*     2.7    24.2    +      -       -      +
    641D  VAL*     4.0    21.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 497 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    495D  VAL*     3.3    14.1    +      -       +      +
    496D  ASP*     1.3    70.6    +      -       -      +
    498D  LYS*     1.3    66.9    +      -       -      +
    500D  LEU*     3.4     7.7    -      -       -      +
    501D  GLU*     2.7    42.5    +      -       -      +
    592D  LEU*     3.9    22.9    -      -       +      -
    595D  VAL*     4.1    29.6    -      -       +      -
    600D  LYS*     3.8    25.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 498 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    496D  ASP*     3.4     8.0    +      -       -      +
    497D  THR*     1.3    83.8    +      -       -      +
    499D  ARG*     1.3    61.7    +      -       -      +
    501D  GLU*     3.5    18.1    +      -       -      +
    502D  GLN*     3.1    24.3    +      -       -      +
    600D  LYS*     6.2     3.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 499 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    496D  ASP*     3.3    29.2    +      -       +      +
    497D  THR      3.2     0.4    -      -       -      -
    498D  LYS*     1.3    74.2    -      -       -      +
    500D  LEU*     1.3    66.3    +      -       -      +
    502D  GLN*     3.3     6.4    +      -       +      +
    503D  MET*     3.0    39.6    +      -       +      +
    638D  GLN*     3.3    53.8    +      -       +      +
    639D  ALA*     4.9     1.8    -      -       +      -
    871D  THR*     5.4     6.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 500 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    495D  VAL*     3.8    25.1    -      -       +      -
    496D  ASP      3.2     8.7    +      -       -      +
    497D  THR*     3.1     9.6    +      -       -      +
    499D  ARG*     1.3    79.3    -      -       -      +
    501D  GLU*     1.3    56.5    +      -       -      +
    503D  MET*     3.1    27.1    +      -       +      +
    504D  GLY*     2.9    23.7    +      -       -      -
    587D  TYR      3.7    16.8    -      -       -      +
    588D  ILE*     3.6    21.5    -      -       +      +
    591D  LEU*     3.8    28.5    -      -       +      -
    592D  LEU*     4.3    23.6    -      -       +      +
    595D  VAL*     5.7     0.7    -      -       +      -
    636D  ILE*     4.1     6.5    -      -       +      +
    639D  ALA*     3.8    10.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 501 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    497D  THR*     2.7    29.7    +      -       -      +
    498D  LYS*     3.8    21.3    -      -       -      +
    500D  LEU*     1.3    72.8    -      -       -      +
    502D  GLN*     1.3    58.4    +      -       -      +
    504D  GLY*     3.1     5.3    +      -       -      +
    505D  LYS*     3.0    24.4    +      -       -      +
    588D  ILE*     5.3     0.2    -      -       -      -
    592D  LEU*     4.1    30.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 502 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    498D  LYS      3.1    17.9    +      -       -      +
    499D  ARG*     3.8     6.1    -      -       +      +
    500D  LEU      3.2     0.2    -      -       -      -
    501D  GLU*     1.3    73.6    -      -       -      +
    503D  MET*     1.3    65.9    +      -       +      +
    504D  GLY      3.1     0.4    -      -       -      -
    505D  LYS*     3.2    40.3    +      -       -      +
    506D  GLU*     3.2    40.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 503 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    499D  ARG*     3.0    35.9    +      -       +      +
    500D  LEU*     3.1    34.3    +      -       +      +
    502D  GLN*     1.3    76.8    -      -       +      +
    504D  GLY*     1.3    63.2    +      -       -      +
    506D  GLU*     3.9    14.9    -      -       -      +
    507D  LEU*     3.0    30.0    +      -       +      +
    588D  ILE*     4.2     9.0    -      -       +      -
    635D  LYS*     3.7    50.3    -      -       +      +
    636D  ILE*     4.0    13.7    -      -       +      +
    638D  GLN*     4.8     4.0    -      -       -      +
    639D  ALA*     4.4     3.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 504 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    500D  LEU      2.9    13.3    +      -       -      -
    501D  GLU*     3.1     7.3    +      -       -      -
    503D  MET*     1.3    78.5    -      -       -      +
    505D  LYS*     1.3    59.4    +      -       -      +
    507D  LEU*     3.9     4.8    -      -       -      +
    508D  ALA*     3.2    23.0    +      -       -      +
    584D  GLN*     4.3     5.4    -      -       -      +
    588D  ILE*     3.8    22.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 505 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    501D  GLU      3.0    11.1    +      -       -      +
    502D  GLN*     3.2    38.4    -      -       -      +
    503D  MET      3.3     0.4    -      -       -      -
    504D  GLY*     1.3    74.5    -      -       -      +
    506D  GLU*     1.3    70.1    +      -       -      +
    507D  LEU      3.3     0.3    +      -       -      -
    508D  ALA*     3.3    13.3    +      -       -      +
    509D  GLU*     3.0    42.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 506 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    502D  GLN*     3.2    36.0    +      -       -      +
    503D  MET*     3.9    13.4    -      -       -      +
    505D  LYS*     1.3    79.5    -      -       +      +
    507D  LEU*     1.3    62.0    +      -       +      +
    509D  GLU*     3.3    14.7    +      -       -      +
    510D  GLN*     3.2    32.4    +      -       +      +
    635D  LYS*     5.0    12.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 507 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    503D  MET*     3.0    20.2    +      -       +      +
    504D  GLY*     3.9     4.7    -      -       -      +
    506D  GLU*     1.3    75.3    -      -       -      +
    508D  ALA*     1.3    59.8    +      -       -      +
    510D  GLN*     3.3    15.6    +      -       -      +
    511D  LEU*     2.8    32.8    +      -       +      +
    580D  LEU*     3.9    35.0    -      -       +      +
    583D  LEU*     3.7    22.4    -      -       +      -
    584D  GLN*     3.6    40.6    -      -       +      +
    588D  ILE*     4.3    10.3    -      -       +      -
    632D  GLU*     5.2     4.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 508 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    504D  GLY      3.2    15.5    +      -       -      +
    505D  LYS*     3.7     7.0    -      -       -      +
    507D  LEU*     1.3    78.8    -      -       -      +
    509D  GLU*     1.3    64.3    +      -       +      +
    511D  LEU*     3.1     7.4    +      -       -      +
    512D  GLY*     3.1    18.5    +      -       -      -
    584D  GLN*     3.5    16.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 509 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    505D  LYS*     3.0    44.0    +      -       +      +
    506D  GLU*     3.3    13.9    +      -       -      +
    507D  LEU      3.3     0.6    -      -       -      -
    508D  ALA*     1.3    77.6    -      -       +      +
    510D  GLN*     1.3    61.8    +      -       -      +
    512D  GLY*     3.2    10.4    +      -       -      +
    513D  THR*     3.3    16.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 510 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    506D  GLU*     3.2    23.4    +      -       +      +
    507D  LEU*     3.6    18.4    -      -       -      +
    508D  ALA      3.3     0.2    -      -       -      -
    509D  GLU*     1.3    74.9    -      -       -      +
    511D  LEU*     1.3    64.1    +      -       -      +
    512D  GLY      3.1     0.7    +      -       -      -
    513D  THR*     3.1     8.8    +      -       -      -
    514D  VAL*     3.1    29.6    +      -       +      +
    576D  HIS*     4.3     8.1    -      -       -      -
    580D  LEU*     3.9    19.0    -      -       +      +
    632D  GLU*     3.0    29.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 511 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    507D  LEU*     2.8    14.3    +      -       +      +
    508D  ALA*     3.1    12.3    +      -       -      +
    510D  GLN*     1.3    76.7    -      -       -      +
    512D  GLY*     1.3    54.0    +      -       -      +
    514D  VAL*     4.8     1.6    -      -       +      -
    515D  GLU*     3.0    31.8    +      -       -      +
    577D  TYR*     3.8    42.1    -      -       +      +
    580D  LEU*     3.6    41.1    -      -       +      +
    581D  GLY*     4.2     6.3    -      -       -      +
    584D  GLN*     3.4    40.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 512 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    508D  ALA      3.1    11.5    +      -       -      -
    509D  GLU*     3.2     4.2    +      -       -      -
    510D  GLN      3.1     0.4    -      -       -      -
    511D  LEU*     1.3    75.1    -      -       -      +
    513D  THR*     1.3    58.6    +      -       -      +
    515D  GLU*     3.1    12.3    +      -       -      +
    516D  GLN*     2.8    38.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 513 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    509D  GLU      3.3    13.0    +      -       -      -
    510D  GLN*     3.1     9.2    +      -       -      -
    512D  GLY*     1.3    74.5    -      -       -      +
    514D  VAL*     1.3    60.3    +      -       +      +
    516D  GLN*     3.5     5.7    +      -       -      +
    517D  ARG*     3.0    28.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 514 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    510D  GLN*     3.1    20.8    +      -       +      +
    511D  LEU*     4.2     3.8    -      -       -      +
    513D  THR*     1.3    75.9    -      -       +      +
    515D  GLU*     1.3    66.3    +      -       -      +
    517D  ARG*     3.2     7.2    +      -       -      +
    518D  ILE*     2.9    30.2    +      -       +      +
    573D  ASN*     3.6    32.5    -      -       -      +
    576D  HIS*     4.0    27.1    -      -       +      +
    577D  TYR*     3.8    23.3    -      -       +      +
    580D  LEU*     4.4     6.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 515 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    511D  LEU      3.0    23.3    +      -       -      +
    512D  GLY*     3.4    10.1    -      -       -      +
    514D  VAL*     1.3    76.3    -      -       -      +
    516D  GLN*     1.3    70.9    +      -       -      +
    518D  ILE*     3.1     5.2    +      -       -      +
    519D  TYR*     2.7    66.8    +      -       +      +
    528D  ILE*     4.0    13.5    -      -       +      -
    577D  TYR*     4.1    19.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 516 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    512D  GLY*     2.8    21.6    +      -       -      +
    513D  THR*     3.9     5.8    -      -       -      +
    515D  GLU*     1.3    83.5    +      -       -      +
    517D  ARG*     1.3    62.2    +      -       -      +
    519D  TYR*     3.2    26.2    +      -       -      +
    520D  GLU*     3.0    41.1    +      -       -      +
    525D  GLU*     4.4    11.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 517 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    513D  THR*     3.0    19.9    +      -       +      +
    514D  VAL*     3.4     7.6    -      -       -      +
    516D  GLN*     1.3    76.1    -      -       -      +
    518D  ILE*     1.3    61.7    +      -       -      +
    520D  GLU*     3.5    27.5    +      -       -      +
    521D  LEU*     3.1    57.5    +      -       +      +
    569D  GLU*     3.1    37.8    +      -       -      -
    573D  ASN*     3.4    25.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 518 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    514D  VAL*     2.9    18.6    +      -       +      +
    515D  GLU      3.1     7.4    +      -       -      +
    517D  ARG*     1.3    73.6    -      -       -      +
    519D  TYR*     1.3    59.8    +      -       -      +
    521D  LEU*     3.3     1.3    +      -       -      -
    522D  ALA*     2.8    28.4    +      -       -      +
    526D  PHE*     3.9    28.3    -      -       +      -
    528D  ILE*     3.9    20.9    -      -       +      -
    570D  ILE*     3.4    18.5    -      -       +      +
    573D  ASN*     3.7    42.0    -      -       +      +
    574D  ILE*     3.9    12.8    -      -       +      +
    577D  TYR*     3.8    19.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 519 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    515D  GLU*     2.7    55.3    +      -       +      +
    516D  GLN*     3.2    20.8    +      -       -      +
    518D  ILE*     1.3    75.1    -      -       +      +
    520D  GLU*     1.3    58.6    +      -       +      +
    522D  ALA*     4.4     0.2    -      -       -      -
    523D  GLY*     2.8    22.7    +      -       -      -
    524D  GLN      3.0    29.9    +      -       -      +
    525D  GLU*     3.6    37.5    -      -       +      +
    526D  PHE*     3.1    42.0    +      +       -      -
    527D  ASN*     5.1     0.3    -      -       -      -
    528D  ILE*     3.9    18.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 520 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    516D  GLN*     3.0    32.6    +      -       -      +
    517D  ARG*     3.7    27.0    +      -       -      +
    518D  ILE      3.2     0.2    -      -       -      -
    519D  TYR*     1.3    75.2    -      -       +      +
    521D  LEU*     1.3    65.6    +      -       -      +
    523D  GLY*     3.0    14.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 521 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    517D  ARG*     3.1    50.3    +      -       +      +
    520D  GLU*     1.3    77.2    -      -       +      +
    522D  ALA*     1.3    62.2    +      -       -      +
    523D  GLY*     3.5     0.5    +      -       -      -
    542D  LEU*     4.6     4.3    -      -       -      +
    568D  HIS*     4.1    22.3    +      -       +      -
    569D  GLU*     3.8    22.9    -      -       +      +
    570D  ILE*     3.8    28.7    -      -       +      +
    573D  ASN*     3.7    26.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 522 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    518D  ILE      2.8    18.1    +      -       -      +
    521D  LEU*     1.3    76.5    -      -       -      +
    523D  GLY*     1.3    57.9    +      -       -      +
    524D  GLN*     3.1    21.2    +      -       +      +
    526D  PHE*     4.2     9.0    -      -       +      -
    537D  ILE*     4.0    20.6    -      -       +      -
    541D  LYS*     2.9    30.0    +      -       -      +
    542D  LEU*     4.5     6.6    -      -       -      +
    570D  ILE*     3.5    14.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 523 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    519D  TYR      2.8     8.6    +      -       -      -
    520D  GLU*     3.0    12.9    +      -       -      -
    521D  LEU      3.2     0.2    -      -       -      -
    522D  ALA*     1.3    75.6    -      -       -      +
    524D  GLN*     1.3    62.0    +      -       -      +
    541D  LYS*     4.7     4.9    -      -       -      -
----------------------------------------------------------
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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