Contacts of the helix formed by residues 490 - 511 (chain G) 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 G).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    155G  THR*     4.1     3.5    -      -       +      +
    157G  GLY      3.0    22.7    -      -       -      +
    158G  LEU*     4.5     4.5    -      -       +      -
    488G  ALA      2.9    23.1    -      -       -      +
    489G  GLU*     1.3    76.5    -      -       -      +
    491G  HIS*     1.3    65.9    +      -       -      +
    492G  THR*     4.7     5.4    -      -       -      +
    493G  ILE*     3.2    17.0    +      -       +      +
    494G  ALA*     3.0    18.7    +      -       -      +
     19H  HIS*     4.2    15.2    -      -       +      +
     23H  PHE*     3.3    33.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 491 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40G  ALA*     4.3     5.6    -      -       +      +
     43G  THR*     5.8     0.2    -      -       +      -
     44G  GLU*     3.1    29.2    -      -       +      -
     72G  ASN*     2.8    32.8    +      -       +      +
     73G  ASN*     4.8     0.4    -      -       -      -
     74G  PHE      4.3     5.8    -      -       -      -
    489G  GLU      3.3     4.4    +      -       -      -
    490G  PRO*     1.3    65.7    -      -       -      +
    492G  THR*     1.3    55.8    +      -       +      +
    493G  ILE      2.8     5.4    +      -       -      -
    494G  ALA*     3.0     4.8    +      -       -      -
    495G  ALA*     2.6    36.5    +      -       +      +
     19H  HIS*     5.4     0.6    -      -       -      +
     65H  LYS*     2.6    25.5    +      -       +      -
     66H  ASN*     3.3    28.3    -      -       -      -
     69H  LEU*     3.5    42.4    -      -       +      +
     70H  SER*     5.3     1.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 492 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158G  LEU*     5.3     1.4    -      -       -      +
    490G  PRO*     4.7     5.5    -      -       -      +
    491G  HIS*     1.3    75.7    -      -       -      +
    493G  ILE*     1.3    64.2    +      -       -      +
    495G  ALA*     3.9     6.7    -      -       -      -
    496G  PHE*     3.4    16.3    +      -       -      +
    522G  TYR*     5.3     0.7    +      -       -      -
     66H  ASN*     4.0     7.2    -      -       +      -
     70H  SER*     3.3    25.1    +      -       -      +
    301H  ALA*     3.4    17.4    -      -       -      +
    304H  ALA*     3.4    28.9    -      -       +      -
    305H  THR*     2.8    34.9    +      -       -      +
    308H  PHE*     5.6     2.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 493 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    155G  THR*     3.4    23.1    -      -       +      +
    157G  GLY      3.5    11.4    -      -       -      +
    158G  LEU*     3.3    45.1    -      -       +      +
    159G  VAL      4.2    15.9    -      -       -      +
    160G  GLY*     4.6     6.1    -      -       -      -
    490G  PRO*     3.2    13.4    +      -       +      +
    491G  HIS      2.8     1.0    +      -       -      -
    492G  THR*     1.3    80.2    +      -       -      +
    494G  ALA*     1.3    68.5    +      -       -      +
    495G  ALA      2.8     2.1    +      -       -      -
    496G  PHE*     2.9    14.6    +      -       -      +
    497G  LEU*     3.0    11.1    +      -       +      +
    522G  TYR*     3.7    26.9    -      -       +      +
    524G  GLY*     4.1     6.3    -      -       -      -
    305H  THR*     4.7     6.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 494 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40G  ALA*     3.6    17.5    -      -       +      -
     41G  THR*     3.4    36.8    -      -       -      +
     44G  GLU*     4.0     6.6    -      -       +      +
    155G  THR*     3.4    14.1    +      -       -      +
    489G  GLU*     4.0     2.7    -      -       +      +
    490G  PRO      3.0     8.9    +      -       -      +
    491G  HIS*     3.0     6.8    +      -       -      +
    493G  ILE*     1.3    79.0    -      -       -      +
    495G  ALA*     1.3    51.7    +      -       -      +
    497G  LEU*     3.6     1.9    -      -       -      +
    498G  GLY*     2.7    32.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 495 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44G  GLU*     3.9    14.6    -      -       -      +
     48G  ASN*     4.8     0.2    +      -       -      -
    491G  HIS*     2.6    21.5    +      -       +      +
    492G  THR      3.8     1.3    -      -       -      +
    493G  ILE      2.8     0.8    +      -       -      -
    494G  ALA*     1.3    69.6    -      -       -      +
    496G  PHE*     1.3    67.2    +      -       -      +
    498G  GLY*     3.0     2.6    +      -       -      -
    499G  GLY*     2.9    19.8    +      -       -      -
     62H  GLU*     5.6     1.6    -      -       -      +
     65H  LYS*     4.1    10.3    -      -       -      +
     66H  ASN*     3.7    20.0    -      -       -      +
    297H  ALA*     4.6     8.7    -      -       +      +
    301H  ALA*     3.5    18.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 496 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    492G  THR      3.4     9.4    +      -       -      +
    493G  ILE      2.9    12.0    +      -       -      +
    495G  ALA*     1.3    75.0    -      -       -      +
    497G  LEU*     1.3    70.9    +      -       +      +
    499G  GLY*     2.9    12.3    +      -       -      -
    500G  ALA*     3.1    16.4    +      -       +      -
    520G  TYR*     3.8    25.6    -      +       -      -
    522G  TYR*     3.3    61.9    -      +       +      +
    298H  VAL*     3.3    38.0    -      -       +      +
    301H  ALA*     3.3    12.3    -      -       +      +
    302H  VAL*     3.8    22.4    -      -       +      -
    322H  LEU*     5.8     2.2    -      -       +      -
    324H  PHE*     4.4     9.9    -      +       -      -
    332H  THR*     5.0     5.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 497 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41G  THR*     4.0     9.6    -      -       +      -
     45G  ILE*     4.8     0.4    -      -       -      -
    153G  CYS*     4.6     6.5    -      -       +      -
    154G  ARG      3.1    35.2    -      -       -      +
    155G  THR*     3.5    14.8    -      -       -      +
    160G  GLY*     3.8    23.3    -      -       -      +
    161G  TYR      3.5     8.5    -      -       -      +
    162G  MET*     4.0    29.8    -      -       +      -
    493G  ILE*     3.0     8.3    +      -       +      +
    494G  ALA      3.6     8.1    -      -       -      +
    496G  PHE*     1.3    89.8    -      -       +      +
    498G  GLY*     1.3    64.7    +      -       -      +
    500G  ALA*     3.3     2.3    +      -       +      -
    501G  ALA*     2.9    28.6    +      -       -      +
    520G  TYR*     5.0     5.6    -      -       +      -
    522G  TYR*     6.0     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 498 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41G  THR*     4.7     0.4    -      -       -      +
     44G  GLU*     4.2     2.2    -      -       -      -
     45G  ILE*     3.3    34.1    -      -       -      +
     48G  ASN*     2.9    17.8    +      -       -      -
    494G  ALA      2.7    20.5    +      -       -      -
    495G  ALA      3.0     3.6    +      -       -      -
    497G  LEU*     1.3    73.5    -      -       -      +
    499G  GLY*     1.3    57.9    +      -       -      +
    502G  ALA*     3.1    21.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 499 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48G  ASN*     3.5    11.9    -      -       -      +
    495G  ALA      2.9     9.5    +      -       -      -
    496G  PHE      2.9     4.6    +      -       -      -
    498G  GLY*     1.3    77.0    -      -       -      +
    500G  ALA*     1.3    64.2    +      -       -      +
    502G  ALA*     3.4     4.7    +      -       -      +
    503G  GLN*     3.4    16.1    +      -       -      +
    294H  SER*     3.6    25.9    -      -       -      +
    297H  ALA*     3.8     7.4    -      -       -      -
    298H  VAL*     3.8     7.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 500 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    162G  MET*     4.3     4.5    -      -       +      -
    496G  PHE*     3.1    24.0    +      -       +      +
    497G  LEU*     4.1     2.7    -      -       -      +
    499G  GLY*     1.3    75.7    -      -       -      +
    501G  ALA*     1.3    63.3    +      -       -      +
    503G  GLN*     3.3     6.9    +      -       -      +
    504G  GLU*     3.2    29.1    +      -       -      +
    520G  TYR*     4.9     0.7    -      -       +      -
    298H  VAL*     3.6    11.8    -      -       +      +
    324H  PHE*     4.5     6.3    -      -       +      -
    326H  ASP*     4.8     2.5    -      -       -      -
    330H  LEU*     3.7    32.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 501 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45G  ILE*     3.9    14.6    -      -       +      -
    151G  LEU*     3.9     6.8    -      -       +      +
    153G  CYS*     3.7    21.1    -      -       -      -
    162G  MET*     3.6    22.1    -      -       -      -
    497G  LEU      2.9    18.6    +      -       -      +
    500G  ALA*     1.3    74.6    -      -       -      +
    502G  ALA*     1.3    66.2    +      -       -      +
    504G  GLU*     2.9    16.0    +      -       -      +
    505G  VAL*     3.0    18.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 502 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45G  ILE*     3.9    16.5    -      -       -      +
     48G  ASN*     3.3    29.4    -      -       +      +
     49G  LEU*     3.3    23.9    -      -       +      +
    498G  GLY      3.1    19.8    +      -       -      +
    499G  GLY      3.6     4.7    -      -       -      +
    500G  ALA      3.4     0.2    -      -       -      -
    501G  ALA*     1.3    78.5    -      -       -      +
    503G  GLN*     1.3    63.2    +      -       -      +
    505G  VAL*     3.3     2.3    +      -       -      -
    506G  ILE*     3.2    18.4    +      -       -      +
    294H  SER*     5.0     2.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 503 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20G  TRP*     4.3     0.9    -      -       -      -
    499G  GLY      3.4     3.8    +      -       -      +
    500G  ALA      3.3     9.8    +      -       -      +
    501G  ALA      3.1     0.8    -      -       -      -
    502G  ALA*     1.3    77.9    -      -       -      +
    504G  GLU*     1.3    65.0    +      -       -      +
    506G  ILE*     3.0    27.4    +      -       -      +
    507G  LYS*     2.8    45.4    +      -       -      +
    513G  PHE*     4.6     6.5    -      -       -      -
    185H  PHE*     3.0    43.6    -      -       +      -
    294H  SER*     3.4    16.7    +      -       -      -
    326H  ASP*     3.6    28.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 504 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151G  LEU*     4.4     8.7    -      -       +      -
    162G  MET*     4.6     1.8    -      -       +      -
    164G  ILE*     5.3     3.6    -      -       +      -
    500G  ALA      3.3    13.7    -      -       -      +
    501G  ALA*     2.9     9.4    +      -       -      +
    503G  GLN*     1.3    74.4    -      -       -      +
    505G  VAL*     1.3    65.3    +      -       -      +
    507G  LYS*     2.9    46.6    +      -       -      +
    508G  ILE*     2.8    32.2    +      -       +      +
    515G  ILE*     3.6     3.0    -      -       +      -
    516G  PHE*     3.3    49.1    +      -       +      -
    326H  ASP*     3.3    16.3    -      -       -      +
    330H  LEU*     3.3     7.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 505 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33G  VAL*     3.9    18.6    -      -       +      -
     45G  ILE*     4.9     2.5    -      -       +      -
     49G  LEU*     4.0    14.1    -      -       +      -
    125G  VAL*     4.3    13.7    -      -       +      -
    127G  VAL*     3.7    26.2    -      -       +      -
    151G  LEU*     3.7    12.1    -      -       +      +
    501G  ALA      3.0    15.5    +      -       -      +
    502G  ALA*     3.4    10.3    -      -       -      +
    503G  GLN      3.2     0.2    -      -       -      -
    504G  GLU*     1.3    76.5    -      -       -      +
    506G  ILE*     1.3    57.9    +      -       -      +
    508G  ILE*     3.3    11.4    +      -       +      +
    509G  ILE*     2.9    43.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 506 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20G  TRP*     3.7    39.3    -      -       +      -
     28G  LEU*     4.4    16.8    -      -       +      -
     48G  ASN      4.8     0.9    -      -       -      +
     49G  LEU*     3.9    16.6    -      -       +      -
     52G  PRO*     4.7     9.2    -      -       +      -
    502G  ALA      3.2    12.8    +      -       -      +
    503G  GLN*     3.0    28.1    +      -       -      +
    505G  VAL*     1.3    71.8    -      -       -      +
    507G  LYS*     1.3    61.3    -      -       -      +
    508G  ILE      2.8     1.8    -      -       -      -
    509G  ILE*     2.8     8.7    +      -       +      +
    510G  THR*     2.6    57.4    +      -       +      +
    513G  PHE*     6.1     0.7    -      -       +      -
    294H  SER*     4.2     8.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 507 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169G  HIS*     3.8     6.9    +      -       -      -
    503G  GLN*     2.8    35.1    +      -       -      +
    504G  GLU*     2.9    44.8    +      -       -      +
    506G  ILE*     1.3    75.5    -      -       -      +
    508G  ILE*     1.3    56.7    +      -       -      +
    510G  THR*     3.8     5.6    -      -       -      -
    511G  LYS*     2.9    27.0    +      -       -      -
    512G  GLN      3.4     2.8    +      -       -      -
    513G  PHE*     3.8    25.9    +      -       +      +
    514G  VAL      3.1    28.6    +      -       -      +
    515G  ILE*     4.0    10.3    -      -       +      -
    326H  ASP      2.6    31.9    +      -       -      -
    327H  VAL*     4.9     0.2    -      -       -      +
    329H  GLY*     3.4    11.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 508 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124G  THR*     5.2     0.9    -      -       +      +
    125G  VAL*     3.5    33.9    -      -       +      -
    149G  PRO*     4.4     8.5    -      -       +      -
    150G  LEU      5.8     0.7    -      -       -      +
    151G  LEU*     5.5     5.8    -      -       +      -
    164G  ILE*     3.8    16.4    -      -       +      -
    166G  ILE*     3.6    35.2    -      -       +      -
    169G  HIS*     3.8    12.6    -      -       +      +
    504G  GLU*     2.8    20.8    +      -       +      +
    505G  VAL*     3.3    15.7    -      -       +      +
    507G  LYS*     1.3    76.1    -      -       -      +
    509G  ILE*     1.3    65.7    +      -       -      +
    511G  LYS*     3.4    19.1    +      -       -      +
    515G  ILE*     4.2    12.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 509 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27G  ALA*     3.7    23.3    -      -       -      +
     28G  LEU*     3.8    26.5    -      -       +      -
     31G  ALA*     3.5    33.7    -      -       +      -
     33G  VAL*     4.1    12.6    -      -       +      -
     49G  LEU*     5.8     0.9    -      -       +      -
     54G  ILE*     4.7     1.8    -      -       +      -
    124G  THR*     3.9    22.7    -      -       +      -
    125G  VAL*     4.5     3.6    -      -       +      -
    505G  VAL*     2.9    37.5    +      -       +      +
    506G  ILE*     2.8    12.2    +      -       +      +
    508G  ILE*     1.3    74.1    -      -       -      +
    510G  THR*     1.3    59.2    +      -       +      +
    511G  LYS*     4.4     4.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 510 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20G  TRP*     4.9     7.4    -      -       +      +
     24G  GLY*     3.7    31.5    -      -       -      +
     27G  ALA*     4.3     8.7    -      -       -      +
     28G  LEU*     4.5    10.5    -      -       +      +
    506G  ILE*     2.6    48.9    +      -       +      +
    507G  LYS*     3.7     2.1    +      -       -      -
    509G  ILE*     1.3    73.1    -      -       +      +
    511G  LYS*     1.3    71.5    +      -       -      +
    512G  GLN*     2.9    35.0    +      -       +      +
    513G  PHE*     4.8     1.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 511 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169G  HIS*     4.1    19.1    -      -       +      -
    170G  PRO*     4.8    16.1    -      -       +      +
    171G  VAL*     4.1    17.0    -      -       -      +
    172G  ILE      4.7     2.6    +      -       -      -
    173G  GLU*     4.3     5.2    +      -       -      +
    507G  LYS      2.9    14.9    +      -       -      -
    508G  ILE      3.4    13.4    +      -       -      +
    509G  ILE      3.3     4.6    -      -       -      +
    510G  THR*     1.3    80.6    -      -       -      +
    512G  GLN*     1.3    60.3    +      -       -      +
    513G  PHE      3.8     1.6    -      -       -      -
----------------------------------------------------------
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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