Contacts of the helix formed by residues 113 - 139 (chain G) in PDB entry 1F33


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 ASN 113 (chain G).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55G  ARG      3.5     8.2    -      -       -      +
     56G  GLY*     5.1     4.7    -      -       -      -
     57G  ALA      5.6     0.9    +      -       -      -
    112G  HIS*     1.3    81.8    -      -       -      +
    114G  VAL*     1.3    64.9    +      -       -      +
    115G  GLN*     2.7    48.1    -      -       -      +
    116G  ASP*     3.2    32.7    +      -       -      +
    117G  HIS*     3.2    12.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 114 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54G  MET*     4.4    12.8    -      -       +      -
     55G  ARG      3.0    37.1    +      -       -      +
     56G  GLY      3.8     5.4    -      -       -      +
     57G  ALA      3.4    27.4    -      -       -      +
     58G  ASN*     4.4     1.6    -      -       +      +
     59G  PHE*     4.2    11.0    -      -       -      -
     62G  VAL*     4.3    23.8    -      -       +      -
    112G  HIS      4.2     1.3    -      -       -      -
    113G  ASN*     1.3    74.2    -      -       -      +
    115G  GLN*     1.3    62.8    +      -       +      +
    117G  HIS*     3.2     4.4    +      -       -      +
    118G  LEU*     2.8    46.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 115 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57G  ALA*     5.3     4.4    +      -       +      +
     58G  ASN*     5.9     3.0    -      -       -      +
    113G  ASN*     2.7    23.3    -      -       -      +
    114G  VAL*     1.3    78.1    -      -       +      +
    116G  ASP*     1.3    61.3    +      -       -      +
    118G  LEU*     3.4    14.2    -      -       -      +
    119G  LYS*     3.0    42.2    +      -       -      +
    165G  ASN      3.2    21.2    +      -       -      -
    166G  ILE*     3.3    13.2    -      -       -      +
    167G  GLU*     2.7    54.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 116 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111G  ILE*     4.1    28.7    -      -       +      +
    112G  HIS      4.8     0.5    +      -       -      -
    113G  ASN*     3.2    31.3    +      -       -      +
    115G  GLN*     1.3    79.2    -      -       -      +
    117G  HIS*     1.3    62.4    +      -       -      +
    119G  LYS*     3.2    15.8    +      -       -      +
    120G  GLU*     2.9    26.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 117 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49G  GLN*     4.5     5.2    -      -       -      -
     50G  ALA*     3.4    24.2    -      -       +      -
     53G  ASN*     3.4    16.7    +      -       +      -
     54G  MET*     3.7    27.8    -      -       +      -
    107G  TYR*     2.6    33.0    +      +       -      +
    108G  PRO      5.0     1.3    -      -       -      -
    111G  ILE*     3.3    39.1    +      -       +      +
    112G  HIS      3.4    24.0    -      -       -      -
    113G  ASN      3.2     8.7    +      -       -      -
    114G  VAL      3.6     5.6    -      -       -      +
    116G  ASP*     1.3    78.3    -      -       -      +
    118G  LEU*     1.3    55.0    +      -       -      +
    120G  GLU      3.2     0.3    +      -       -      -
    121G  LEU*     2.7    40.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 118 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54G  MET*     5.0     0.9    -      -       +      -
     58G  ASN*     5.8     0.4    -      -       -      +
     62G  VAL*     3.8    28.7    -      -       +      -
     65G  MET*     5.1     4.3    -      -       +      -
     66G  LEU*     5.5     0.4    -      -       +      -
    114G  VAL*     2.8    33.6    +      -       +      +
    115G  GLN*     3.4    15.7    -      -       -      +
    116G  ASP      3.2     0.2    -      -       -      -
    117G  HIS*     1.3    76.8    -      -       -      +
    119G  LYS*     1.3    58.0    +      -       -      +
    121G  LEU*     3.6     9.6    -      -       +      +
    122G  ALA*     2.8    25.6    +      -       -      +
    162G  ILE*     3.3    40.2    -      -       +      +
    165G  ASN*     3.7    34.1    -      -       +      +
    166G  ILE*     3.9    10.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 119 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115G  GLN*     3.0    34.6    +      -       -      +
    116G  ASP*     3.7    12.7    +      -       -      +
    118G  LEU*     1.3    72.7    -      -       -      +
    120G  GLU*     1.3    67.9    +      -       +      +
    122G  ALA*     3.3     3.7    +      -       -      +
    123G  ASP*     3.1    30.0    +      -       -      +
    166G  ILE*     4.0    37.0    -      -       +      -
    167G  GLU      5.7     0.7    -      -       -      -
     18K  ARG*     4.5     9.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 120 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107G  TYR*     3.5    22.0    -      -       +      +
    108G  PRO*     3.9    10.8    -      -       +      +
    111G  ILE*     3.7    21.6    -      -       +      +
    116G  ASP*     2.9    20.3    +      -       +      +
    117G  HIS      3.6     2.5    -      -       -      +
    119G  LYS*     1.3    77.5    -      -       -      +
    121G  LEU*     1.3    61.1    +      -       -      +
    123G  ASP*     3.5    13.4    +      -       -      +
    124G  ARG*     2.9    52.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 121 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46G  ILE*     3.8    27.6    -      -       +      +
     47G  THR*     4.3     8.3    -      -       -      -
     50G  ALA*     3.6    32.3    -      -       +      -
     54G  MET*     4.7     0.7    -      -       +      -
     66G  LEU*     3.7    32.5    -      -       +      -
    107G  TYR*     4.0     2.9    -      -       +      +
    117G  HIS      2.7    29.4    +      -       -      +
    118G  LEU*     3.6    12.6    -      -       +      +
    120G  GLU*     1.3    72.0    -      -       -      +
    122G  ALA*     1.3    66.3    +      -       -      +
    124G  ARG*     3.1     3.8    +      -       -      -
    125G  TYR*     2.8    39.4    +      -       +      -
    162G  ILE*     4.1    11.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 122 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118G  LEU      2.8    17.6    +      -       -      +
    119G  LYS*     3.3     8.0    +      -       -      +
    121G  LEU*     1.3    76.2    -      -       -      +
    123G  ASP*     1.3    57.5    +      -       -      +
    125G  TYR*     4.5     0.9    -      -       -      -
    126G  ALA*     2.9    31.7    +      -       -      +
    159G  LEU*     3.4    10.9    -      -       -      +
    162G  ILE*     3.8    15.7    -      -       +      +
    163G  GLU*     4.3     6.1    -      -       +      -
    166G  ILE*     4.2     4.7    -      -       +      -
     18K  ARG*     3.5    31.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 123 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119G  LYS*     3.1    13.4    +      -       -      +
    120G  GLU*     3.6    16.4    -      -       -      +
    121G  LEU      3.1     0.6    -      -       -      -
    122G  ALA*     1.3    78.7    -      -       -      +
    124G  ARG*     1.3    69.3    +      -       -      +
    126G  ALA*     3.3     4.7    +      -       -      +
    127G  ILE*     3.1    29.8    +      -       +      +
     18K  ARG*     2.9    30.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 124 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43G  LEU*     3.8    17.7    -      -       +      -
     46G  ILE*     4.1    12.8    -      -       +      +
    104G  LEU*     3.7    18.5    -      -       +      +
    105G  LYS*     2.9    54.8    +      -       -      +
    106G  SER      3.6     4.2    +      -       -      -
    107G  TYR*     2.9    36.1    -      -       -      +
    108G  PRO*     3.6    14.8    -      -       -      +
    120G  GLU*     2.9    40.7    +      -       -      +
    121G  LEU*     3.1     6.8    +      -       -      +
    123G  ASP*     1.3    77.8    -      -       -      +
    125G  TYR*     1.3    65.9    +      -       +      +
    127G  ILE*     3.3     8.6    +      -       -      +
    128G  VAL*     3.1    26.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 125 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43G  LEU*     3.5    35.0    -      -       +      -
     47G  THR*     2.6    38.8    +      -       +      +
     66G  LEU*     5.5     0.2    -      -       +      -
     69G  PHE*     3.6    16.9    -      +       -      +
     73G  LEU*     3.5    11.5    -      -       +      +
    121G  LEU*     2.8    41.2    +      -       +      +
    122G  ALA      3.9     3.1    -      -       -      +
    124G  ARG*     1.3    73.7    -      -       -      +
    126G  ALA*     1.3    53.7    +      -       -      +
    128G  VAL*     3.3     1.4    +      -       -      +
    129G  ALA*     2.6    38.8    +      -       -      +
    155G  LEU*     4.2     9.9    -      -       +      +
    158G  PHE*     3.7    36.1    -      +       +      -
    159G  LEU*     4.1    13.0    -      -       +      -
    162G  ILE*     3.5    23.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 126 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122G  ALA      2.9    20.0    +      -       -      +
    123G  ASP*     3.4     6.1    -      -       -      +
    125G  TYR*     1.3    77.8    -      -       -      +
    127G  ILE*     1.3    58.8    +      -       +      +
    130G  ASN*     2.7    45.6    +      -       -      +
    159G  LEU*     3.9    14.8    -      -       +      +
     18K  ARG*     3.6    30.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 127 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39G  GLN*     4.3    10.5    -      -       -      +
    103G  PRO*     4.4    17.7    -      -       +      +
    104G  LEU*     3.8    24.0    -      -       +      -
    105G  LYS*     5.5     3.4    -      -       +      +
    123G  ASP*     3.1    18.5    +      -       +      +
    124G  ARG*     3.3    13.0    +      -       -      +
    126G  ALA*     1.3    76.3    -      -       +      +
    128G  VAL*     1.3    62.1    +      -       -      +
    130G  ASN*     4.0     3.5    -      -       -      +
    131G  ASP*     3.0    27.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 128 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39G  GLN*     3.4    35.9    -      -       +      +
     40G  PHE*     3.6    28.7    -      -       +      -
     43G  LEU*     4.0    17.3    -      -       +      -
    104G  LEU*     3.8    17.5    -      -       +      -
    124G  ARG      3.1    14.6    +      -       -      +
    125G  TYR      3.9     2.2    -      -       -      +
    127G  ILE*     1.3    72.8    -      -       -      +
    129G  ALA*     1.3    66.4    +      -       -      +
    131G  ASP*     3.8     0.2    -      -       -      +
    132G  VAL*     2.9    24.4    +      -       -      +
    155G  LEU*     3.6    22.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 129 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125G  TYR      2.6    25.9    +      -       -      +
    126G  ALA*     3.7     5.4    -      -       -      +
    128G  VAL*     1.3    74.1    -      -       -      +
    130G  ASN*     1.3    63.3    +      -       -      +
    132G  VAL*     3.2    10.1    -      -       -      +
    133G  ARG*     3.0    30.9    +      -       -      +
    152G  SER*     4.8     0.2    +      -       -      -
    155G  LEU*     3.9    21.7    -      -       +      +
    156G  ASP*     3.7    17.4    -      -       -      +
    159G  LEU*     4.4    10.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 130 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126G  ALA*     2.7    32.2    +      -       -      +
    127G  ILE*     4.1     3.7    -      -       -      +
    129G  ALA*     1.3    74.9    -      -       -      +
    131G  ASP*     1.3    62.1    +      -       -      +
    133G  ARG*     2.4    36.7    +      -       -      +
    134G  LYS*     3.3    33.9    +      -       -      +
     18K  ARG      3.2    20.0    +      -       -      -
     19K  ASN*     3.7     4.0    -      -       -      -
     20K  ASP*     2.9    36.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 131 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35G  ARG*     2.8    41.1    +      -       -      -
     36G  GLN*     3.7     2.3    -      -       -      +
     39G  GLN*     3.0    25.2    +      -       -      +
    103G  PRO*     5.4     0.3    -      -       -      +
    127G  ILE*     3.0    21.4    +      -       +      +
    128G  VAL      3.8     2.5    -      -       -      +
    130G  ASN*     1.3    74.1    -      -       -      +
    132G  VAL*     1.3    66.8    +      -       -      +
    134G  LYS*     3.0    12.2    +      -       -      +
    135G  ALA      3.0    15.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 132 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36G  GLN*     3.6    28.3    -      -       -      +
     40G  PHE*     4.3    19.1    -      -       +      -
    128G  VAL      2.9    25.2    +      -       -      +
    129G  ALA*     3.2    11.7    -      -       -      +
    131G  ASP*     1.3    74.9    +      -       -      +
    133G  ARG*     1.3    66.8    +      -       -      +
    135G  ALA*     3.2     9.0    +      -       -      +
    136G  ILE*     3.4    13.5    +      -       -      +
    148G  LEU*     3.9    34.0    -      -       +      +
    151G  ALA*     4.7     2.0    -      -       +      -
    152G  SER*     4.0    20.6    -      -       -      +
    155G  LEU*     4.8     2.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 133 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129G  ALA*     3.0    19.3    +      -       -      +
    130G  ASN*     2.4    34.5    +      -       -      +
    131G  ASP      3.1     0.2    -      -       -      -
    132G  VAL*     1.3    76.8    -      -       -      +
    134G  LYS*     1.3    64.4    +      -       +      +
    136G  ILE*     3.4    24.0    -      -       +      +
    137G  GLY      4.4     0.3    +      -       -      -
    152G  SER*     3.7    14.6    -      -       -      +
    156G  ASP*     2.6    42.4    +      -       -      -
     19K  ASN*     3.1    21.3    +      -       -      +
     20K  ASP*     3.1    15.5    +      -       -      -
     21K  VAL*     3.4    21.3    -      -       -      +
     83K  ARG*     4.2     5.2    -      -       -      +
    141K  ASP*     4.3     7.2    -      -       -      +
    142K  ASP*     4.3     8.5    -      -       +      +
    143K  ASP*     3.9     9.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 134 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130G  ASN*     3.3    23.1    +      -       -      +
    131G  ASP*     3.0    10.5    +      -       -      +
    133G  ARG*     1.3    76.7    -      -       +      +
    135G  ALA*     1.3    65.8    +      -       -      +
    136G  ILE      3.0     3.6    +      -       -      -
    137G  GLY*     3.1    12.0    +      -       -      -
    138G  GLU*     3.2    14.0    +      -       -      +
     20K  ASP*     2.5    40.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 135 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32G  LEU*     3.9    19.8    -      -       +      +
     35G  ARG*     4.3     3.6    -      -       -      +
     36G  GLN*     3.5    23.8    -      -       -      +
    131G  ASP      3.0     8.7    +      -       -      +
    132G  VAL*     3.2    10.3    +      -       -      +
    134G  LYS*     1.3    76.4    -      -       -      +
    136G  ILE*     1.3    56.0    +      -       -      +
    138G  GLU*     3.1    14.5    +      -       -      +
    139G  ALA*     2.8    30.8    +      -       -      +
    148G  LEU*     3.8    12.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 136 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132G  VAL      3.5     9.0    -      -       -      +
    133G  ARG*     3.4    19.7    -      -       +      +
    134G  LYS      3.0     0.8    -      -       -      -
    135G  ALA*     1.3    77.2    -      -       -      +
    137G  GLY*     1.3    62.8    +      -       -      +
    139G  ALA*     3.2    21.0    +      -       -      +
    145G  ALA*     4.0    14.2    -      -       +      +
    148G  LEU*     3.9    21.5    -      -       +      +
    149G  THR*     3.5    38.6    -      -       -      +
    152G  SER*     3.7    11.9    -      -       -      +
    142K  ASP*     3.8    28.0    -      -       +      +
    143K  ASP*     3.6    16.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 137 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133G  ARG      4.4     0.8    +      -       -      -
    134G  LYS      3.1     7.6    +      -       -      -
    136G  ILE*     1.3    81.7    -      -       -      +
    138G  GLU*     1.3    59.4    +      -       -      +
    139G  ALA      3.5     5.1    +      -       -      +
    142K  ASP*     4.4     8.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 138 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32G  LEU*     3.6    30.6    -      -       +      +
     35G  ARG*     3.9    12.4    +      -       -      -
    134G  LYS*     3.2    13.4    +      -       -      +
    135G  ALA*     3.1    12.9    +      -       -      +
    137G  GLY*     1.3    75.7    -      -       -      +
    139G  ALA*     1.3    60.6    +      -       -      +
    140G  LYS*     3.5    11.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 139 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32G  LEU*     4.0    15.5    -      -       +      -
    135G  ALA      2.8    11.3    +      -       -      +
    136G  ILE      3.2    17.6    +      -       -      +
    137G  GLY      4.2     4.2    -      -       -      +
    138G  GLU*     1.3    75.3    -      -       -      +
    140G  LYS*     1.3    63.9    +      -       -      +
    141G  ASP      4.4     1.3    -      -       -      +
    144G  THR*     4.4     6.3    -      -       +      -
    145G  ALA*     3.9    31.6    -      -       -      +
    148G  LEU*     4.2     5.6    -      -       +      -
----------------------------------------------------------
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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