Contacts of the helix formed by residues 490 - 511 (chain E) 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 E).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    155E  THR*     4.1     3.1    -      -       +      +
    157E  GLY      3.0    25.8    -      -       -      +
    158E  LEU*     4.5     3.6    -      -       +      -
    488E  ALA      2.9    22.4    -      -       -      +
    489E  GLU*     1.3    77.3    -      -       -      +
    491E  HIS*     1.3    65.9    +      -       -      +
    492E  THR*     4.7     5.8    -      -       -      +
    493E  ILE*     3.2    14.0    +      -       +      +
    494E  ALA*     3.0    19.1    +      -       -      +
     19F  HIS*     4.2    14.8    -      -       +      +
     23F  PHE*     3.3    33.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 491 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40E  ALA*     4.3     5.6    -      -       +      +
     43E  THR*     5.8     0.2    -      -       +      -
     44E  GLU*     3.2    29.5    +      -       +      -
     72E  ASN*     2.8    33.7    +      -       +      +
     73E  ASN*     4.8     0.4    -      -       -      -
     74E  PHE*     4.3     6.3    -      -       +      -
    489E  GLU      3.3     4.5    +      -       -      -
    490E  PRO*     1.3    66.5    -      -       -      +
    492E  THR*     1.3    57.8    +      -       +      +
    493E  ILE      2.8     5.5    +      -       -      -
    494E  ALA*     3.0     5.4    +      -       -      -
    495E  ALA*     2.6    36.7    +      -       +      +
     19F  HIS*     5.4     0.6    -      -       -      +
     65F  LYS*     2.6    24.6    +      -       -      +
     66F  ASN*     3.4    27.4    -      -       -      -
     69F  LEU*     3.6    39.8    -      -       +      +
     70F  SER*     5.4     1.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 492 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158E  LEU*     5.3     1.6    -      -       -      +
    490E  PRO*     4.7     5.4    -      -       -      +
    491E  HIS*     1.3    76.5    -      -       -      +
    493E  ILE*     1.3    66.0    +      -       -      +
    495E  ALA*     3.9     6.5    -      -       -      -
    496E  PHE*     3.4    16.1    +      -       -      +
    522E  TYR*     5.4     0.7    +      -       -      -
     66F  ASN*     4.1     6.5    -      -       +      +
     70F  SER*     3.4    24.9    +      -       -      +
    301F  ALA*     3.4    17.6    -      -       -      +
    304F  ALA*     3.5    27.6    -      -       +      -
    305F  THR*     2.8    34.2    +      -       -      +
    308F  PHE*     5.6     2.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 493 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    155E  THR*     3.4    22.0    -      -       +      +
    157E  GLY      3.5    12.3    -      -       -      +
    158E  LEU*     3.4    45.3    -      -       +      +
    159E  VAL      4.1    16.2    -      -       -      +
    160E  GLY*     4.6     6.3    -      -       -      -
    490E  PRO*     3.2    12.3    +      -       +      +
    491E  HIS      2.8     1.2    +      -       -      -
    492E  THR*     1.3    78.9    +      -       -      +
    494E  ALA*     1.3    67.6    +      -       -      +
    495E  ALA      2.9     2.5    +      -       -      -
    496E  PHE*     2.9    14.4    +      -       -      +
    497E  LEU*     3.0    11.8    +      -       +      +
    522E  TYR*     3.7    27.6    -      -       +      +
    524E  GLY*     4.1     5.4    -      -       -      -
    305F  THR*     4.8     5.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 494 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40E  ALA*     3.6    17.7    -      -       +      -
     41E  THR*     3.4    36.9    -      -       -      +
     44E  GLU*     3.9     6.7    -      -       +      +
    155E  THR*     3.5    14.3    +      -       -      +
    489E  GLU*     4.1     2.7    -      -       +      +
    490E  PRO      3.0     8.5    +      -       -      +
    491E  HIS*     3.0     7.1    +      -       -      +
    493E  ILE*     1.3    79.0    -      -       -      +
    495E  ALA*     1.3    57.2    +      -       -      +
    497E  LEU*     3.7     1.4    -      -       -      +
    498E  GLY*     2.8    27.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 495 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44E  GLU*     3.9    14.6    -      -       -      +
     48E  ASN*     4.8     0.2    +      -       -      -
    491E  HIS*     2.6    21.4    +      -       +      +
    492E  THR      3.8     1.6    -      -       -      +
    493E  ILE      2.9     0.4    +      -       -      -
    494E  ALA*     1.3    70.3    -      -       -      +
    496E  PHE*     1.3    66.3    +      -       -      +
    498E  GLY*     2.9     3.3    +      -       -      -
    499E  GLY*     2.9    19.8    +      -       -      -
     62F  GLU*     5.6     1.8    -      -       -      +
     65F  LYS*     4.2    10.8    -      -       -      +
     66F  ASN*     3.7    18.4    -      -       -      +
    297F  ALA*     4.6     8.4    -      -       +      +
    301F  ALA*     3.5    20.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 496 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    492E  THR      3.4     9.2    +      -       -      +
    493E  ILE      2.9     8.4    +      -       -      +
    495E  ALA*     1.3    78.2    -      -       -      +
    497E  LEU*     1.3    70.5    +      -       +      +
    499E  GLY*     2.9    12.3    +      -       -      -
    500E  ALA*     3.1    16.2    +      -       +      -
    520E  TYR*     3.8    25.1    -      +       -      -
    522E  TYR*     3.3    66.6    -      +       +      +
    529E  SER*     5.2     0.2    -      -       -      -
    298F  VAL*     3.4    37.7    -      -       +      +
    301F  ALA*     3.3    11.8    -      -       +      +
    302F  VAL*     3.8    18.2    -      -       +      -
    322F  LEU*     5.8     2.7    -      -       +      -
    324F  PHE*     4.5     9.6    -      +       -      -
    332F  THR*     5.0     5.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 497 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41E  THR*     4.1     9.6    -      -       +      -
     45E  ILE*     4.8     0.7    -      -       -      -
    153E  CYS*     4.6     6.3    -      -       +      -
    154E  ARG      3.1    35.2    -      -       -      +
    155E  THR*     3.5    14.8    -      -       -      +
    160E  GLY*     3.8    27.6    -      -       -      +
    161E  TYR      3.5     8.1    -      -       -      +
    162E  MET*     4.0    25.4    -      -       +      -
    493E  ILE*     3.0    12.1    +      -       +      +
    494E  ALA      3.7     4.0    -      -       -      +
    496E  PHE*     1.3    89.6    -      -       +      +
    498E  GLY*     1.3    58.0    +      -       -      +
    499E  GLY      3.0     0.2    +      -       -      -
    500E  ALA*     3.3     1.6    +      -       +      -
    501E  ALA*     2.9    34.5    +      -       -      +
    520E  TYR*     5.0     5.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 498 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41E  THR*     4.7     0.4    -      -       -      +
     44E  GLU*     4.1     2.2    -      -       -      -
     45E  ILE*     3.3    34.1    -      -       -      +
     48E  ASN*     2.9    17.4    +      -       -      -
    494E  ALA      2.8    19.8    +      -       -      -
    495E  ALA      2.9     4.2    +      -       -      -
    497E  LEU*     1.3    73.1    -      -       -      +
    499E  GLY*     1.3    58.0    +      -       -      +
    502E  ALA*     3.1    22.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 499 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48E  ASN*     3.5    11.4    -      -       -      +
    495E  ALA      2.9    12.0    +      -       -      -
    496E  PHE      2.9     4.2    +      -       -      -
    498E  GLY*     1.3    77.6    -      -       -      +
    500E  ALA*     1.3    65.1    +      -       -      +
    502E  ALA*     3.4     4.2    +      -       -      +
    503E  GLN*     3.4    16.8    +      -       -      +
    294F  SER*     3.7    25.7    -      -       -      -
    297F  ALA*     3.8     5.4    -      -       -      -
    298F  VAL*     3.8     7.9    -      -       -      -
    326F  ASP*     5.1     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 500 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    162E  MET*     4.3     4.7    -      -       +      -
    496E  PHE*     3.1    24.4    +      -       +      +
    497E  LEU*     4.1     3.4    -      -       +      +
    499E  GLY*     1.3    73.1    -      -       -      +
    501E  ALA*     1.3    63.6    +      -       -      +
    503E  GLN*     3.4     6.1    +      -       -      +
    504E  GLU*     3.2    28.9    +      -       -      +
    520E  TYR*     4.9     0.2    -      -       +      -
    298F  VAL*     3.6    11.8    -      -       +      +
    324F  PHE*     4.6     4.7    -      -       +      -
    326F  ASP*     4.8     3.8    -      -       -      -
    330F  LEU*     3.6    33.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 501 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45E  ILE*     4.0    14.8    -      -       +      -
    151E  LEU*     3.9     5.3    -      -       +      +
    153E  CYS*     3.7    21.1    -      -       -      -
    162E  MET*     3.6    23.5    -      -       -      -
    497E  LEU      2.9    18.7    +      -       -      +
    500E  ALA*     1.3    75.7    -      -       -      +
    502E  ALA*     1.3    66.2    +      -       -      +
    504E  GLU*     2.9    17.1    +      -       -      +
    505E  VAL*     3.0    17.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 502 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45E  ILE*     3.8    15.2    -      -       -      +
     48E  ASN*     3.3    28.9    -      -       +      +
     49E  LEU*     3.3    24.0    -      -       +      +
    498E  GLY      3.1    19.6    +      -       -      +
    499E  GLY      3.6     4.5    -      -       -      +
    500E  ALA      3.4     0.4    -      -       -      -
    501E  ALA*     1.3    80.1    -      -       -      +
    503E  GLN*     1.3    62.9    +      -       -      +
    505E  VAL*     3.3     2.6    +      -       -      -
    506E  ILE*     3.2    18.7    +      -       -      +
    294F  SER*     5.0     2.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 503 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20E  TRP*     4.3     0.5    -      -       -      -
    499E  GLY      3.4     3.9    +      -       -      +
    500E  ALA      3.6     8.3    -      -       -      +
    501E  ALA      3.1     0.6    -      -       -      -
    502E  ALA*     1.3    77.4    -      -       -      +
    504E  GLU*     1.3    65.7    +      -       -      +
    506E  ILE*     3.0    27.9    +      -       -      +
    507E  LYS*     2.8    45.7    +      -       -      +
    513E  PHE*     4.7     6.1    -      -       -      -
    185F  PHE*     3.1    41.5    -      -       +      -
    294F  SER*     3.3    19.7    +      -       -      -
    326F  ASP*     3.7    28.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 504 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151E  LEU*     4.5     8.3    -      -       +      -
    162E  MET*     4.6     1.8    -      -       +      -
    164E  ILE*     5.3     3.8    -      -       +      -
    500E  ALA      3.3    14.2    -      -       -      +
    501E  ALA*     2.9     9.3    +      -       -      +
    503E  GLN*     1.3    75.2    -      -       -      +
    505E  VAL*     1.3    65.4    +      -       -      +
    507E  LYS*     2.9    43.6    +      -       -      +
    508E  ILE*     2.8    32.2    +      -       +      +
    515E  ILE*     3.6     3.0    -      -       +      +
    516E  PHE*     3.3    50.3    +      -       +      -
    326F  ASP*     3.3    16.5    -      -       -      +
    330F  LEU*     3.4     8.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 505 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33E  VAL*     3.9    18.6    -      -       +      -
     45E  ILE*     4.8     2.2    -      -       +      -
     49E  LEU*     4.0    13.5    -      -       +      -
    125E  VAL*     4.3    13.2    -      -       +      -
    127E  VAL*     3.6    26.9    -      -       +      -
    151E  LEU*     3.7    11.9    -      -       +      -
    501E  ALA      3.0    15.3    +      -       -      +
    502E  ALA*     3.4    10.8    -      -       -      +
    504E  GLU*     1.3    77.3    -      -       -      +
    506E  ILE*     1.3    56.3    +      -       -      +
    508E  ILE*     3.3    11.8    -      -       +      +
    509E  ILE*     2.9    44.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 506 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20E  TRP*     3.7    37.2    -      -       +      -
     28E  LEU*     4.4    18.6    -      -       +      -
     48E  ASN      4.8     0.7    -      -       -      +
     49E  LEU*     3.9    16.4    -      -       +      -
     52E  PRO*     4.7     9.2    -      -       +      -
    502E  ALA      3.2    12.8    +      -       -      +
    503E  GLN*     3.0    29.6    +      -       -      +
    505E  VAL*     1.3    73.6    -      -       -      +
    507E  LYS*     1.3    68.0    -      -       -      +
    508E  ILE      2.9     1.6    -      -       -      -
    509E  ILE*     2.8     8.1    +      -       +      +
    510E  THR*     2.7    49.4    +      -       +      +
    513E  PHE*     6.1     0.7    -      -       +      -
    294F  SER*     4.3     7.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 507 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169E  HIS*     3.8     7.3    +      -       -      -
    503E  GLN*     2.8    39.1    +      -       -      +
    504E  GLU*     3.0    45.9    +      -       -      +
    506E  ILE*     1.3    71.5    -      -       -      +
    508E  ILE*     1.3    57.0    +      -       -      +
    510E  THR*     3.8     5.8    -      -       -      -
    511E  LYS*     2.9    26.2    +      -       -      -
    512E  GLN      3.4     2.9    +      -       -      -
    513E  PHE*     3.8    26.7    +      -       +      +
    514E  VAL      3.1    29.8    +      -       -      +
    515E  ILE*     4.0     9.6    -      -       +      -
    185F  PHE*     5.9     0.2    -      -       -      -
    326F  ASP      2.6    31.3    +      -       -      -
    329F  GLY*     3.4    11.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 508 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124E  THR*     5.8     0.7    -      -       +      -
    125E  VAL*     3.6    33.7    -      -       +      -
    149E  PRO*     4.3     8.3    -      -       +      -
    150E  LEU      5.8     0.4    -      -       -      +
    151E  LEU*     5.5     6.3    -      -       +      -
    164E  ILE*     3.8    16.2    -      -       +      -
    166E  ILE*     3.7    35.2    -      -       +      -
    169E  HIS*     3.8    11.7    -      -       +      +
    504E  GLU*     2.8    20.3    +      -       +      +
    505E  VAL*     3.3    15.9    -      -       +      +
    506E  ILE      2.8     0.2    +      -       -      -
    507E  LYS*     1.3    76.5    -      -       -      +
    509E  ILE*     1.3    64.3    +      -       -      +
    511E  LYS*     3.4    19.4    +      -       -      +
    515E  ILE*     4.2    11.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 509 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27E  ALA*     3.7    22.9    -      -       -      +
     28E  LEU*     3.8    26.7    -      -       +      -
     31E  ALA*     3.4    33.4    -      -       +      -
     33E  VAL*     4.1    13.5    -      -       +      -
     49E  LEU*     5.8     0.7    -      -       +      -
     54E  ILE*     4.7     2.2    -      -       +      -
    124E  THR*     3.9    22.9    -      -       +      -
    125E  VAL*     4.5     3.1    -      -       +      -
    505E  VAL*     2.9    37.9    +      -       +      +
    506E  ILE*     2.8    11.9    +      -       +      +
    508E  ILE*     1.3    73.9    -      -       -      +
    510E  THR*     1.3    60.4    +      -       +      +
    511E  LYS*     4.4     5.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 510 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20E  TRP*     4.9     6.1    -      -       +      -
     24E  GLY*     3.7    31.4    -      -       -      +
     27E  ALA*     4.3     9.3    -      -       -      +
     28E  LEU*     4.5    10.8    -      -       +      +
    506E  ILE*     2.7    48.7    +      -       +      +
    507E  LYS*     3.8     2.3    -      -       -      -
    509E  ILE*     1.3    72.3    -      -       +      +
    511E  LYS*     1.3    70.0    +      -       -      +
    512E  GLN*     2.9    36.6    +      -       +      +
    513E  PHE*     4.8     1.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 511 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169E  HIS*     4.1    18.8    -      -       +      -
    170E  PRO*     4.8    16.5    -      -       +      +
    171E  VAL*     4.1    17.1    -      -       -      +
    172E  ILE      4.7     2.9    +      -       -      -
    173E  GLU*     4.2     5.2    +      -       -      +
    507E  LYS      2.9    15.2    +      -       -      -
    508E  ILE      3.6    13.0    -      -       -      +
    509E  ILE      3.3     4.6    -      -       -      +
    510E  THR*     1.3    79.8    -      -       -      +
    512E  GLN*     1.3    60.5    +      -       -      +
    513E  PHE      3.7     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