Contacts of the helix formed by residues 490 - 511 (chain A) in PDB entry 1R4N


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 PRO 490 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    155A  THR*     4.1     3.1    -      -       +      -
    157A  GLY      3.0    25.4    -      -       -      +
    158A  LEU*     4.4     4.3    -      -       +      -
    488A  ALA      2.9    22.9    -      -       -      +
    489A  GLU*     1.3    77.4    -      -       -      +
    491A  HIS*     1.3    60.7    +      -       -      +
    492A  THR*     4.7     5.2    -      -       -      +
    493A  ILE*     3.2    14.0    +      -       +      +
    494A  ALA*     3.0    23.4    +      -       -      +
     19B  HIS*     4.2    14.6    -      -       +      +
     23B  PHE*     3.4    33.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 491 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40A  ALA*     4.2     6.5    -      -       +      +
     43A  THR*     5.8     0.2    -      -       +      -
     44A  GLU*     3.2    29.0    +      -       +      -
     72A  ASN*     2.8    31.7    +      -       +      +
     73A  ASN*     4.8     0.4    -      -       -      -
     74A  PHE      4.3     6.5    -      -       -      -
    489A  GLU      3.3     4.8    +      -       -      -
    490A  PRO*     1.3    66.5    -      -       -      +
    492A  THR*     1.3    56.5    +      -       +      +
    493A  ILE      2.9     5.5    +      -       -      -
    494A  ALA*     3.0     5.5    +      -       -      +
    495A  ALA*     2.6    37.2    +      -       +      +
     19B  HIS*     5.4     0.6    -      -       -      +
     65B  LYS*     2.6    26.7    +      -       +      +
     66B  ASN*     3.4    28.9    -      -       -      +
     69B  LEU*     3.5    40.2    +      -       +      +
     70B  SER*     5.4     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 492 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158A  LEU*     5.3     1.4    -      -       -      +
    490A  PRO*     4.7     5.7    -      -       -      +
    491A  HIS*     1.3    74.8    -      -       -      +
    493A  ILE*     1.3    64.6    +      -       -      +
    495A  ALA*     3.9     6.7    -      -       -      -
    496A  PHE*     3.4     4.7    +      -       -      +
    522A  TYR*     5.4     0.2    +      -       -      -
     66B  ASN*     4.0     9.9    -      -       +      +
     70B  SER*     3.3    25.7    +      -       -      +
    301B  ALA*     3.4    29.7    -      -       -      +
    304B  ALA*     3.4    27.8    -      -       +      -
    305B  THR*     2.8    33.5    +      -       -      +
    308B  PHE*     5.7     1.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 493 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    155A  THR*     3.4    24.2    -      -       +      +
    157A  GLY      3.5    11.0    -      -       -      +
    158A  LEU*     3.4    44.6    -      -       +      +
    159A  VAL      4.2    15.3    -      -       -      +
    160A  GLY*     4.6     5.6    -      -       -      -
    490A  PRO*     3.2    12.7    +      -       +      +
    491A  HIS      2.9     0.6    -      -       -      -
    492A  THR*     1.3    78.5    +      -       -      +
    494A  ALA*     1.3    69.7    +      -       -      +
    495A  ALA      2.9     2.7    +      -       -      -
    496A  PHE*     2.9    14.6    +      -       -      +
    497A  LEU*     3.0    11.7    +      -       +      +
    522A  TYR*     3.6    27.4    -      -       +      +
    524A  GLY*     4.1     5.8    -      -       -      -
    305B  THR*     4.7     5.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 494 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40A  ALA*     3.5    18.2    -      -       +      -
     41A  THR*     3.5    35.9    -      -       -      +
     44A  GLU*     4.0     6.6    -      -       +      +
    155A  THR*     3.5    14.6    +      -       -      +
    489A  GLU*     4.1     2.5    -      -       +      +
    490A  PRO      3.0     8.9    +      -       -      +
    491A  HIS*     3.0     7.1    +      -       -      +
    493A  ILE*     1.3    80.0    -      -       -      +
    495A  ALA*     1.3    57.3    -      -       -      +
    497A  LEU*     3.7     1.6    -      -       -      +
    498A  GLY*     2.8    27.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 495 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44A  GLU*     3.9    15.0    -      -       +      +
     48A  ASN*     4.8     0.3    +      -       -      -
    491A  HIS*     2.6    21.6    +      -       +      +
    492A  THR      3.9     1.3    -      -       -      +
    493A  ILE      2.9     0.8    +      -       -      -
    494A  ALA*     1.3    70.1    -      -       -      +
    496A  PHE*     1.3    66.3    +      -       -      +
    498A  GLY*     3.0     3.3    +      -       -      -
    499A  GLY*     2.9    19.6    +      -       -      -
     62B  GLU*     5.5     2.2    -      -       -      +
     65B  LYS*     4.1    11.9    -      -       -      +
     66B  ASN*     3.6    20.0    -      -       -      +
    297B  ALA*     4.5     8.2    -      -       +      +
    301B  ALA*     3.6    18.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 496 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    492A  THR      3.4     8.7    +      -       -      +
    493A  ILE      2.9    11.3    +      -       -      +
    495A  ALA*     1.3    74.2    -      -       -      +
    497A  LEU*     1.3    69.5    +      -       +      +
    499A  GLY*     3.0    12.0    +      -       -      -
    500A  ALA*     3.1    16.4    +      -       +      -
    520A  TYR*     3.8    25.8    -      +       -      -
    522A  TYR*     3.4    61.7    -      +       +      +
    298B  VAL*     3.2    40.8    -      -       +      +
    301B  ALA*     3.3    13.5    -      -       +      +
    302B  VAL*     3.8    21.5    -      -       +      -
    322B  LEU*     5.8     2.9    -      -       +      -
    324B  PHE*     4.4    10.1    -      +       -      -
    332B  THR*     5.0     5.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 497 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41A  THR*     4.0     9.9    -      -       +      -
     45A  ILE*     4.9     0.4    -      -       -      -
    153A  CYS*     4.7     6.3    -      -       +      -
    154A  ARG      3.1    35.0    -      -       -      +
    155A  THR*     3.5    14.4    -      -       -      +
    160A  GLY*     3.8    23.6    -      -       -      +
    161A  TYR      3.5     8.7    -      -       -      +
    162A  MET*     4.0    30.1    -      -       +      -
    493A  ILE      3.0     7.6    +      -       -      +
    494A  ALA      3.7     8.1    -      -       -      +
    496A  PHE*     1.3    89.1    -      -       +      +
    498A  GLY*     1.3    58.9    +      -       -      +
    499A  GLY      3.0     0.3    +      -       -      -
    500A  ALA*     3.3     2.1    +      -       +      +
    501A  ALA*     2.9    33.9    +      -       -      +
    520A  TYR*     5.0     5.8    -      -       +      -
    522A  TYR*     5.2     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 498 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41A  THR*     4.4     0.4    -      -       -      +
     44A  GLU*     4.2     2.0    -      -       -      -
     45A  ILE*     3.4    34.1    -      -       -      +
     48A  ASN*     2.9    18.4    +      -       -      -
    494A  ALA      2.8    19.6    +      -       -      -
    495A  ALA      3.0     3.6    +      -       -      -
    497A  LEU*     1.3    72.9    -      -       -      +
    499A  GLY*     1.3    56.7    +      -       -      +
    502A  ALA*     3.1    22.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 499 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48A  ASN*     3.5    11.7    -      -       -      -
    495A  ALA      2.9     9.1    +      -       -      -
    496A  PHE      3.0     4.7    +      -       -      -
    498A  GLY*     1.3    78.4    -      -       -      +
    500A  ALA*     1.3    64.9    +      -       -      +
    502A  ALA*     3.6     2.4    -      -       -      +
    503A  GLN*     3.4    16.3    +      -       -      +
    294B  SER*     3.6    26.3    -      -       -      -
    297B  ALA*     3.8     8.1    -      -       -      -
    298B  VAL*     3.8     7.4    -      -       -      -
    326B  ASP*     5.1     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 500 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    162A  MET*     4.3     4.3    -      -       +      -
    496A  PHE*     3.1    24.2    +      -       +      +
    497A  LEU*     4.0     3.1    -      -       +      +
    499A  GLY*     1.3    74.5    -      -       -      +
    501A  ALA*     1.3    63.0    +      -       -      +
    503A  GLN*     3.4     4.0    +      -       -      +
    504A  GLU*     3.3    29.9    +      -       -      +
    520A  TYR*     4.9     0.2    -      -       +      -
    298B  VAL*     3.6    11.0    -      -       +      +
    324B  PHE*     4.6     4.9    -      -       +      -
    326B  ASP*     4.8     4.9    -      -       -      -
    330B  LEU*     3.6    32.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 501 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45A  ILE*     4.0    14.8    -      -       +      -
    151A  LEU*     3.9     5.0    -      -       +      +
    153A  CYS*     3.7    21.3    -      -       -      -
    162A  MET*     3.6    22.8    -      -       -      -
    497A  LEU      2.9    18.7    +      -       -      +
    500A  ALA*     1.3    74.9    -      -       -      +
    502A  ALA*     1.3    66.4    +      -       -      +
    504A  GLU*     2.9    16.3    +      -       -      +
    505A  VAL*     3.0    17.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 502 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45A  ILE*     3.8    15.9    -      -       -      +
     48A  ASN*     3.2    30.1    -      -       +      +
     49A  LEU*     3.4    18.8    -      -       +      +
    498A  GLY      3.1    19.8    +      -       -      +
    499A  GLY      3.6     4.5    -      -       -      +
    501A  ALA*     1.3    79.3    -      -       -      +
    503A  GLN*     1.3    62.9    +      -       -      +
    505A  VAL*     3.2     7.5    +      -       -      +
    506A  ILE*     3.1    18.3    +      -       -      +
    294B  SER*     5.0     2.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 503 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20A  TRP*     4.3     1.0    -      -       -      -
    499A  GLY      3.4     3.3    +      -       -      +
    500A  ALA      3.6     9.0    -      -       -      +
    501A  ALA      3.1     0.6    -      -       -      -
    502A  ALA*     1.3    77.2    -      -       -      +
    504A  GLU*     1.3    60.1    +      -       -      +
    506A  ILE*     2.9    28.0    +      -       -      +
    507A  LYS*     2.8    50.6    +      -       -      +
    513A  PHE*     4.6     6.9    -      -       -      -
    185B  PHE*     3.1    42.7    -      -       +      -
    294B  SER*     3.4    17.1    +      -       -      -
    326B  ASP*     3.7    28.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 504 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151A  LEU*     4.4     8.5    -      -       +      -
    162A  MET*     4.6     1.6    -      -       +      -
    164A  ILE*     5.3     2.7    -      -       +      -
    500A  ALA      3.3    13.6    -      -       -      +
    501A  ALA*     2.9    10.1    +      -       -      +
    503A  GLN*     1.3    76.3    -      -       -      +
    505A  VAL*     1.3    65.5    +      -       -      +
    507A  LYS*     2.9    45.1    +      -       -      +
    508A  ILE*     2.8    32.7    +      -       +      +
    515A  ILE*     3.6     2.6    -      -       +      +
    516A  PHE*     3.3    50.3    +      -       +      -
    326B  ASP*     3.3    17.0    -      -       -      +
    330B  LEU*     3.3     6.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 505 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33A  VAL*     3.9    18.2    -      -       +      -
     45A  ILE*     4.8     2.0    -      -       +      -
     49A  LEU*     4.0    14.8    -      -       +      -
    125A  VAL*     4.3    13.5    -      -       +      -
    127A  VAL*     3.6    26.9    -      -       +      -
    151A  LEU*     3.7    11.9    -      -       +      -
    501A  ALA      3.0    15.5    +      -       -      +
    502A  ALA*     3.3    10.5    -      -       -      +
    504A  GLU*     1.3    76.2    -      -       -      +
    506A  ILE*     1.3    59.3    +      -       -      +
    508A  ILE*     3.3    10.7    +      -       -      +
    509A  ILE*     2.9    44.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 506 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20A  TRP*     3.7    37.9    -      -       +      -
     28A  LEU*     4.4    19.1    -      -       +      -
     48A  ASN      4.8     0.9    -      -       -      +
     49A  LEU*     3.8    16.4    -      -       +      -
     52A  PRO*     4.7     8.7    -      -       +      -
    502A  ALA      3.1    12.9    +      -       -      +
    503A  GLN*     2.9    29.4    +      -       -      +
    505A  VAL*     1.3    72.6    -      -       -      +
    507A  LYS*     1.3    67.4    +      -       -      +
    508A  ILE      2.9     1.8    -      -       -      -
    509A  ILE*     2.8     7.7    +      -       +      +
    510A  THR*     2.7    49.0    +      -       +      +
    513A  PHE*     6.1     0.7    -      -       +      -
    294B  SER*     4.4     8.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 507 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169A  HIS*     3.8     5.8    +      -       -      -
    503A  GLN*     2.8    39.3    +      -       -      +
    504A  GLU*     3.1    45.5    +      -       -      +
    506A  ILE*     1.3    73.2    -      -       -      +
    508A  ILE*     1.3    56.7    +      -       -      +
    510A  THR*     3.7     5.6    -      -       -      -
    511A  LYS*     2.9    27.4    +      -       -      -
    512A  GLN      3.3     2.8    +      -       -      -
    513A  PHE*     3.8    27.4    +      -       +      +
    514A  VAL      3.0    28.9    +      -       -      +
    515A  ILE*     4.0     9.2    -      -       +      -
    326B  ASP      2.6    32.2    +      -       -      -
    329B  GLY      3.4    10.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 508 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124A  THR*     5.8     1.1    -      -       +      -
    125A  VAL*     3.6    31.9    -      -       +      -
    149A  PRO*     4.3     8.5    -      -       +      -
    150A  LEU      5.8     0.7    -      -       -      +
    151A  LEU*     5.5     6.5    -      -       +      -
    164A  ILE*     3.7    17.5    -      -       +      -
    166A  ILE*     3.6    35.4    -      -       +      -
    169A  HIS*     3.8    11.6    -      -       +      +
    504A  GLU*     2.8    19.6    +      -       +      +
    505A  VAL*     3.3    15.0    -      -       +      +
    507A  LYS*     1.3    76.3    -      -       -      +
    509A  ILE*     1.3    64.1    +      -       -      +
    511A  LYS*     3.3    19.6    +      -       -      +
    515A  ILE*     4.1    12.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 509 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27A  ALA*     3.6    23.3    -      -       -      +
     28A  LEU*     3.7    26.5    -      -       +      -
     31A  ALA*     3.5    33.2    -      -       +      -
     33A  VAL*     4.1    13.2    -      -       +      -
     49A  LEU*     5.8     0.7    -      -       +      -
     54A  ILE*     4.7     2.2    -      -       +      -
    124A  THR*     3.9    21.8    -      -       +      -
    125A  VAL*     4.4     3.1    -      -       +      -
    505A  VAL*     2.9    39.0    +      -       +      +
    506A  ILE*     2.8     7.5    +      -       +      +
    508A  ILE*     1.3    78.5    -      -       -      +
    510A  THR*     1.3    60.2    +      -       +      +
    511A  LYS*     3.5     5.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 510 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20A  TRP*     4.9     6.7    -      -       +      +
     24A  GLY*     3.7    31.5    -      -       -      +
     27A  ALA*     4.3     8.1    -      -       -      +
     28A  LEU*     4.5    10.8    -      -       +      +
    506A  ILE*     2.7    47.5    +      -       +      +
    507A  LYS*     3.7     2.4    +      -       -      -
    509A  ILE*     1.3    73.0    -      -       +      +
    511A  LYS*     1.3    70.2    +      -       -      +
    512A  GLN*     2.9    36.7    +      -       +      +
    513A  PHE*     4.7     1.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 511 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169A  HIS*     4.1    20.0    -      -       +      -
    170A  PRO*     4.8    17.2    -      -       +      +
    171A  VAL*     4.1    17.4    -      -       -      +
    172A  ILE      4.7     2.6    +      -       -      -
    173A  GLU*     4.2     5.5    +      -       -      +
    507A  LYS      2.9    14.3    +      -       -      -
    508A  ILE      3.3    12.5    +      -       -      +
    509A  ILE      3.3     4.6    -      -       -      +
    510A  THR*     1.3    80.1    -      -       -      +
    512A  GLN*     1.3    60.0    +      -       -      +
    513A  PHE      3.8     1.3    -      -       -      -
----------------------------------------------------------
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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