Contacts of the helix formed by residues 2 - 26 (chain A) in PDB entry 1V9P


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 THR 2 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1A  MET*     1.3    70.6    -      -       -      +
      3A  ARG*     1.3    56.0    +      -       -      +
      4A  GLU*     2.6    15.8    +      -       +      +
      5A  GLU*     2.5    53.1    +      -       +      +
      6A  ALA      3.1     8.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 3 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1A  MET      3.3     5.5    +      -       -      -
      2A  THR*     1.3    71.8    +      -       -      +
      4A  GLU*     1.3    63.8    +      -       -      +
      6A  ALA*     3.6     1.4    +      -       -      -
      7A  ARG      3.4     2.3    +      -       -      -
     51A  PHE*     4.4    19.4    -      -       +      -
     53A  GLU*     3.4    38.2    +      -       -      +
     54A  PHE*     3.3    31.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 4 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2A  THR*     2.6    18.3    +      -       +      +
      3A  ARG*     1.3    72.4    -      -       -      +
      5A  GLU*     1.3    66.9    +      -       -      +
      7A  ARG*     2.9    57.9    +      -       -      +
      8A  ARG*     3.3    24.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 5 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1A  MET*     2.8    47.4    -      -       +      +
      2A  THR*     2.5    29.7    +      -       +      +
      4A  GLU*     1.3    75.2    -      -       -      +
      6A  ALA*     1.3    61.6    +      -       -      +
      8A  ARG*     3.0    25.2    +      -       +      +
      9A  ARG*     3.0    14.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 6 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1A  MET*     3.8    20.3    -      -       +      +
      2A  THR      3.1     3.4    +      -       -      +
      3A  ARG      3.8     8.7    -      -       -      +
      5A  GLU*     1.3    78.3    -      -       -      +
      7A  ARG*     1.3    62.3    +      -       -      +
      9A  ARG      3.6     0.5    +      -       -      -
     10A  ILE*     2.9    31.1    +      -       +      +
     47A  LEU*     4.0     3.9    -      -       +      +
     51A  PHE*     3.7    44.9    -      -       +      -
     54A  PHE*     3.8     6.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 7 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3A  ARG      3.9     0.2    -      -       -      +
      4A  GLU*     2.9    51.8    +      -       -      +
      6A  ALA*     1.3    78.8    -      -       -      +
      8A  ARG*     1.3    55.9    +      -       -      +
     10A  ILE*     2.9     7.3    +      -       +      +
     11A  ASN*     2.6    49.9    +      -       -      +
     54A  PHE*     3.2    40.3    -      -       +      -
    129A  GLU*     2.5    40.6    +      -       -      +
    130A  GLU*     2.8    36.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 8 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4A  GLU*     3.8    26.9    +      -       -      +
      5A  GLU*     3.0    15.1    +      -       +      +
      7A  ARG*     1.3    83.2    -      -       -      +
      9A  ARG*     1.3    52.7    +      -       -      +
     11A  ASN*     2.8    12.6    +      -       -      +
     12A  GLU*     2.7    54.1    +      -       -      +
    130A  GLU*     3.8    43.2    +      -       +      +
    132A  VAL*     6.5     0.2    -      -       -      -
    167A  ASP*     5.7     0.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 9 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1A  MET*     4.6     7.2    -      -       +      -
      5A  GLU*     3.0    11.9    +      -       +      +
      6A  ALA      4.0     3.4    -      -       -      +
      8A  ARG*     1.3    78.1    -      -       -      +
     10A  ILE*     1.3    56.2    +      -       -      +
     12A  GLU*     4.1    15.5    +      -       -      +
     13A  LEU*     2.5    71.9    +      -       +      +
     16A  LEU*     5.9     5.1    -      -       -      +
     40A  LEU*     4.9     7.5    -      -       -      +
     43A  GLU*     2.6    47.8    +      -       -      +
     47A  LEU*     4.0    13.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 10 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6A  ALA*     2.9    20.1    +      -       +      +
      7A  ARG*     2.9     9.9    +      -       +      +
      9A  ARG*     1.3    78.6    -      -       -      +
     11A  ASN*     1.3    63.8    +      -       -      +
     13A  LEU*     4.2     6.0    -      -       +      +
     14A  ARG*     2.6    60.1    +      -       -      +
     44A  LEU*     4.7     5.6    -      -       +      -
     47A  LEU*     4.0    37.5    -      -       +      +
     48A  GLU*     4.2     8.3    -      -       +      +
     54A  PHE*     3.4    44.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 11 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7A  ARG*     2.6    37.8    +      -       -      +
      8A  ARG*     3.2     9.4    -      -       -      +
     10A  ILE*     1.3    79.2    -      -       -      +
     12A  GLU*     1.3    62.1    +      -       +      +
     14A  ARG*     3.9     5.2    -      -       -      +
     15A  ASP*     3.2    20.3    +      -       -      +
     18A  ARG*     5.6     0.2    +      -       -      -
    129A  GLU*     3.2    32.6    +      -       -      +
    130A  GLU*     4.9     2.4    -      -       -      +
    132A  VAL*     3.8    22.0    -      -       +      +
    133A  LEU      4.7     3.6    -      -       -      +
    134A  VAL*     3.4    29.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 12 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8A  ARG*     2.7    42.0    +      -       -      +
      9A  ARG*     3.6    15.7    +      -       -      +
     11A  ASN*     1.3    69.0    -      -       -      +
     13A  LEU*     1.3    67.0    +      -       -      +
     15A  ASP*     2.8    11.6    +      -       -      +
     16A  LEU*     2.9    25.3    -      -       +      +
    132A  VAL*     3.7    30.3    -      -       +      +
    161A  ARG*     4.1    14.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 13 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9A  ARG*     2.5    67.1    +      -       +      +
     10A  ILE*     4.2     3.8    -      -       +      +
     12A  GLU*     1.3    71.9    -      -       -      +
     14A  ARG*     1.3    57.8    +      -       -      +
     15A  ASP      3.0     0.3    +      -       -      -
     16A  LEU*     3.3     7.7    +      -       +      +
     17A  ILE*     2.8    36.1    +      -       +      +
     40A  LEU*     3.6    38.8    -      -       +      +
     43A  GLU*     3.6    23.6    -      -       +      +
     44A  LEU*     3.7    28.9    -      -       +      -
     47A  LEU*     4.6     3.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 14 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10A  ILE*     2.6    44.3    +      -       -      +
     11A  ASN*     3.9     4.7    -      -       -      +
     13A  LEU*     1.3    78.3    -      -       -      +
     15A  ASP*     1.3    56.4    +      -       -      +
     17A  ILE      3.8     0.4    -      -       -      -
     18A  ARG*     2.9    54.8    +      -       -      +
     44A  LEU*     3.0    17.3    -      -       +      +
     48A  GLU*     3.1    21.8    +      -       -      +
     54A  PHE      3.4    20.2    +      -       -      -
     56A  SER*     4.0     9.4    +      -       -      +
     58A  ASP*     5.4     1.1    -      -       -      -
     59A  SER*     2.8    46.2    +      -       -      +
     60A  PRO*     3.2    24.0    -      -       +      +
    134A  VAL      5.8     1.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 15 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11A  ASN      3.2    10.7    +      -       -      +
     12A  GLU      2.8    11.0    +      -       -      +
     14A  ARG*     1.3    76.2    -      -       -      +
     16A  LEU*     1.3    54.1    +      -       -      +
     17A  ILE      3.0     0.7    -      -       -      -
     18A  ARG*     2.6    14.3    +      -       -      +
     19A  TYR*     2.6    35.0    +      -       -      +
    132A  VAL*     4.2     7.6    -      -       +      -
    133A  LEU*     4.7    12.9    -      -       -      +
    153A  LEU*     5.3     1.4    -      -       -      +
    160A  ARG*     3.1    41.9    +      -       -      +
    161A  ARG*     2.4    35.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 16 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9A  ARG*     5.9     4.9    -      -       -      +
     12A  GLU*     2.9    29.5    +      -       +      +
     13A  LEU*     3.8     9.4    -      -       +      +
     15A  ASP*     1.3    79.4    -      -       -      +
     17A  ILE*     1.3    58.6    +      -       -      +
     19A  TYR*     4.0     9.4    -      -       +      -
     20A  HIS*     2.7    50.6    +      -       +      +
     40A  LEU*     4.4    23.6    -      -       +      -
    160A  ARG*     5.8     0.9    -      -       -      +
    161A  ARG*     2.9    33.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 17 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     13A  LEU      2.8    21.3    +      -       -      +
     14A  ARG      3.9     3.1    -      -       -      +
     16A  LEU*     1.3    74.7    -      -       -      +
     18A  ARG*     1.3    58.8    +      -       -      +
     21A  ASN*     3.0    27.4    +      -       -      +
     37A  TYR*     3.8    31.6    +      -       +      +
     40A  LEU*     3.6    24.0    -      -       +      +
     41A  LEU*     3.3    40.4    -      -       +      +
     44A  LEU*     3.8    19.1    -      -       +      -
     60A  PRO*     3.5    25.8    -      -       +      -
     69A  LEU*     4.0     3.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 18 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14A  ARG*     2.9    60.3    +      -       -      +
     15A  ASP*     2.6    16.4    +      -       -      +
     17A  ILE*     1.3    70.7    -      -       -      +
     19A  TYR*     1.3    64.5    +      -       -      +
     21A  ASN*     3.4     1.4    +      -       -      +
     22A  TYR*     3.0    23.6    +      -       -      +
     58A  ASP*     3.2    45.2    +      -       -      +
     60A  PRO*     4.6     3.1    -      -       +      +
     69A  LEU*     4.2    18.2    -      -       +      +
    133A  LEU      5.2     3.2    +      -       -      -
    134A  VAL      4.4    15.2    +      -       -      -
    135A  PHE*     6.0     0.2    -      -       -      +
    147A  GLU*     5.2     1.6    +      -       -      -
    149A  THR*     4.0    33.7    +      -       -      +
    150A  GLN*     3.4    34.7    -      -       -      +
    153A  LEU*     4.7     8.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 19 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15A  ASP*     2.6    19.8    +      -       -      +
     16A  LEU*     3.5     9.4    -      -       +      +
     18A  ARG*     1.3    72.7    -      -       -      +
     20A  HIS*     1.3    76.8    +      +       -      +
     22A  TYR*     3.0    25.7    -      +       -      +
     23A  ARG*     2.6    70.4    +      -       +      -
     27A  LEU*     5.5     0.9    -      -       +      -
     31A  GLU*     4.1     7.3    +      -       -      -
    153A  LEU*     5.4     3.1    -      -       +      +
    160A  ARG*     3.1    50.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 20 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16A  LEU*     2.7    45.5    +      -       +      +
     19A  TYR*     1.3    97.2    -      +       -      +
     21A  ASN*     1.3    58.6    +      -       -      +
     22A  TYR      2.9     2.0    -      -       -      -
     23A  ARG*     3.5    16.8    -      -       +      +
     24A  TYR*     2.7    31.0    +      -       -      +
     30A  PRO*     5.4     1.4    -      -       +      +
     31A  GLU*     4.4    16.2    +      -       +      -
     32A  ILE*     3.4    57.5    -      -       +      +
     37A  TYR*     4.4    11.9    -      -       +      -
     40A  LEU*     5.9     1.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 21 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17A  ILE      3.0    20.6    +      -       -      +
     18A  ARG      3.9     3.4    -      -       -      +
     20A  HIS*     1.3    76.0    -      -       -      +
     22A  TYR*     1.3    57.2    +      -       -      +
     25A  TYR*     3.1    50.6    +      -       -      +
     26A  VAL*     4.0     2.9    -      -       -      +
     37A  TYR*     3.6    20.2    +      -       -      +
     65A  GLY      5.3     2.4    +      -       -      -
     67A  ARG      3.2    13.7    +      -       -      -
     68A  PRO*     3.8     2.8    -      -       -      +
     69A  LEU*     2.8    50.9    +      -       +      +
    150A  GLN*     3.9     7.4    +      -       -      +
    213A  PRO*     5.4     0.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 22 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18A  ARG      3.0    13.9    +      -       -      +
     19A  TYR*     3.0    31.6    -      +       -      +
     21A  ASN*     1.3    76.0    +      -       -      +
     23A  ARG*     1.3    52.1    +      -       -      +
     24A  TYR      2.8    13.1    +      -       -      -
     26A  VAL*     3.0    48.0    +      -       +      +
     27A  LEU*     2.9    63.2    +      -       +      +
    150A  GLN*     4.9     6.7    -      -       -      +
    153A  LEU*     3.6    38.0    +      -       +      -
    154A  THR*     4.0    20.8    +      -       +      -
    156A  PRO*     4.8    11.9    -      -       +      +
    217A  ALA*     5.5     1.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 23 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19A  TYR*     2.6    53.7    +      -       +      +
     20A  HIS*     3.5    23.1    -      -       +      +
     22A  TYR*     1.3    71.9    -      -       -      +
     24A  TYR*     1.3    57.1    +      -       -      +
     27A  LEU*     3.9    24.7    -      -       +      +
     28A  ALA      3.5     1.5    +      -       -      -
     29A  ASP*     3.0    51.0    +      -       -      +
     30A  PRO*     3.0    30.8    -      -       +      -
     31A  GLU*     2.7    32.9    +      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 24 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20A  HIS      2.7    16.3    +      -       -      +
     22A  TYR      2.8     1.0    -      -       -      -
     23A  ARG*     1.3    77.3    -      -       -      +
     25A  TYR*     1.3   110.3    +      +       +      +
     26A  VAL      2.5    17.4    +      -       -      -
     28A  ALA*     2.8    26.6    +      -       -      +
     30A  PRO*     3.6    31.9    -      -       +      -
     34A  ASP*     4.1    34.6    +      -       +      +
     37A  TYR*     6.4     1.3    -      +       +      -
----------------------------------------------------------
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Residues in contact with TYR 25 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21A  ASN*     3.1    40.6    +      -       -      +
     24A  TYR*     1.3   109.3    -      +       +      +
     26A  VAL*     1.3    60.9    +      -       +      +
     28A  ALA*     6.0     0.2    -      -       -      -
     34A  ASP*     4.4    11.3    +      -       -      -
     37A  TYR*     4.7    12.9    -      +       -      -
     65A  GLY      4.4     1.9    +      -       -      -
     66A  ALA*     3.2    46.3    -      -       +      +
     67A  ARG*     4.1    11.2    -      -       -      -
     68A  PRO*     4.2    21.9    -      -       +      +
    214A  ARG*     3.5    26.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 26 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21A  ASN*     4.0     5.6    -      -       -      +
     22A  TYR*     3.0    55.0    -      -       +      +
     24A  TYR      2.5     7.3    +      -       -      -
     25A  TYR*     1.3    81.3    -      -       +      +
     27A  LEU*     1.3    67.1    +      -       +      +
     28A  ALA*     3.4     3.7    +      -       -      +
     68A  PRO*     6.4     0.4    -      -       +      -
    150A  GLN*     5.3     1.8    -      -       -      +
    154A  THR*     4.4     5.2    -      -       +      -
    213A  PRO*     5.1    12.6    -      -       +      -
    214A  ARG*     4.4    24.9    +      -       +      +
    217A  ALA*     4.1    22.9    -      -       +      -
----------------------------------------------------------
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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