Contacts of the helix formed by residues 113 - 139 (chain L) 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 L).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55L  ARG      3.4     9.2    -      -       -      +
     56L  GLY*     5.1     4.5    -      -       -      -
     57L  ALA      5.6     1.0    +      -       -      -
    112L  HIS*     1.3    81.3    -      -       -      +
    114L  VAL*     1.3    67.6    +      -       -      +
    115L  GLN*     2.9    46.5    -      -       -      +
    116L  ASP*     3.2    33.6    +      -       -      +
    117L  HIS*     3.2    12.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 114 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54L  MET*     4.4    13.4    -      -       +      +
     55L  ARG      3.0    36.8    +      -       -      +
     56L  GLY*     3.8     5.8    -      -       -      +
     57L  ALA      3.4    27.6    -      -       -      +
     58L  ASN*     5.1     0.9    -      -       +      -
     59L  PHE*     4.1    10.8    -      -       -      -
     62L  VAL*     4.3    23.3    -      -       +      -
    112L  HIS      4.2     1.1    -      -       -      -
    113L  ASN*     1.3    73.2    +      -       -      +
    115L  GLN*     1.3    63.8    +      -       +      +
    117L  HIS*     3.2     4.2    +      -       -      +
    118L  LEU*     2.8    46.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 115 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57I  ALA*     5.8     0.6    -      -       -      +
     57L  ALA*     5.3     3.6    +      -       +      +
     58L  ASN*     5.9     3.2    -      -       -      +
    113L  ASN*     2.9    18.8    -      -       -      +
    114L  VAL*     1.3    81.8    -      -       +      +
    116L  ASP*     1.3    62.6    +      -       -      +
    118L  LEU*     3.3    12.3    +      -       -      +
    119L  LYS*     3.0    43.4    +      -       -      +
    165L  ASN      3.2    21.6    +      -       -      -
    166L  ILE*     3.3    13.8    -      -       -      +
    167L  GLU*     2.8    53.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 116 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111L  ILE*     4.1    29.5    -      -       +      +
    112L  HIS      4.8     0.7    +      -       -      -
    113L  ASN*     3.2    34.3    +      -       +      +
    115L  GLN*     1.3    78.8    -      -       -      +
    117L  HIS*     1.3    62.5    +      -       -      +
    119L  LYS*     3.3    13.3    +      -       -      +
    120L  GLU*     3.0    26.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 117 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49L  GLN*     4.6     2.2    -      -       -      -
     50L  ALA*     3.4    24.1    -      -       +      -
     53L  ASN*     3.4    18.2    +      -       +      -
     54L  MET*     3.7    27.6    -      -       +      -
    107L  TYR*     2.6    32.5    +      +       -      +
    108L  PRO      4.9     1.3    -      -       -      -
    111L  ILE*     3.2    40.3    +      -       +      +
    112L  HIS*     3.4    24.5    -      -       -      -
    113L  ASN      3.2     8.1    +      -       -      -
    114L  VAL      3.6     6.3    -      -       -      +
    116L  ASP*     1.3    76.3    -      -       -      +
    118L  LEU*     1.3    56.8    +      -       -      +
    120L  GLU      3.2     0.5    +      -       -      -
    121L  LEU*     2.7    41.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 118 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54L  MET*     5.0     1.1    -      -       +      -
     58L  ASN*     5.8     0.2    -      -       -      +
     62L  VAL*     3.8    28.0    -      -       +      -
     65L  MET*     5.1     3.6    -      -       +      -
     66L  LEU*     5.4     0.2    -      -       +      -
    114L  VAL*     2.8    34.9    +      -       +      +
    115L  GLN*     3.5    15.3    -      -       -      +
    117L  HIS*     1.3    76.7    -      -       -      +
    119L  LYS*     1.3    56.4    +      -       -      +
    121L  LEU*     3.6     9.8    -      -       +      +
    122L  ALA*     2.8    25.5    +      -       -      +
    162L  ILE*     3.3    40.1    -      -       +      +
    165L  ASN*     3.7    35.0    -      -       +      +
    166L  ILE*     3.9    10.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 119 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18J  ARG*     4.4     8.4    +      -       -      +
    115L  GLN*     3.0    35.2    +      -       -      +
    116L  ASP*     3.7    12.3    +      -       -      +
    118L  LEU*     1.3    72.6    -      -       -      +
    120L  GLU*     1.3    69.2    +      -       +      +
    122L  ALA*     3.3     3.8    +      -       -      +
    123L  ASP*     3.1    29.4    +      -       -      +
    166L  ILE*     4.0    36.8    -      -       +      -
    167L  GLU      5.7     0.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 120 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107L  TYR*     3.5    25.6    -      -       +      +
    108L  PRO*     3.9    11.3    -      -       +      +
    111L  ILE*     3.7    21.3    -      -       +      +
    116L  ASP*     3.0    19.5    +      -       +      +
    119L  LYS*     1.3    77.0    -      -       -      +
    121L  LEU*     1.3    61.7    +      -       -      +
    123L  ASP*     3.4    13.3    +      -       -      +
    124L  ARG*     2.9    52.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 121 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46L  ILE*     3.9    27.4    -      -       +      +
     47L  THR*     4.2     9.2    -      -       -      -
     50L  ALA*     3.6    32.3    -      -       +      -
     54L  MET*     4.6     0.9    -      -       +      -
     66L  LEU*     3.7    32.8    -      -       +      -
    107L  TYR*     4.0     2.9    -      -       +      +
    117L  HIS      2.7    30.3    +      -       -      +
    118L  LEU*     3.6    12.6    -      -       +      +
    120L  GLU*     1.3    71.5    -      -       -      +
    122L  ALA*     1.3    56.2    +      -       -      +
    124L  ARG*     3.2     3.9    +      -       -      +
    125L  TYR*     2.8    50.6    +      -       +      -
    162L  ILE*     4.1    11.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 122 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18J  ARG*     3.4    34.5    -      -       -      +
    118L  LEU      2.8    18.1    +      -       -      +
    119L  LYS*     3.5     4.9    -      -       -      +
    121L  LEU*     1.3    77.1    -      -       -      +
    123L  ASP*     1.3    57.0    +      -       -      +
    125L  TYR*     4.5     0.9    -      -       -      -
    126L  ALA*     2.8    31.9    +      -       -      +
    159L  LEU*     3.4     9.9    -      -       -      +
    162L  ILE*     3.9    13.6    -      -       +      +
    163L  GLU*     4.3     6.1    -      -       +      -
    166L  ILE*     4.3     4.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 123 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18J  ARG*     2.8    30.7    +      -       -      +
    119L  LYS*     3.1    13.2    +      -       -      +
    120L  GLU*     3.6    17.3    -      -       -      +
    121L  LEU      3.1     0.2    -      -       -      -
    122L  ALA*     1.3    76.3    -      -       -      +
    124L  ARG*     1.3    69.0    +      -       -      +
    126L  ALA*     3.3     3.9    +      -       -      +
    127L  ILE*     3.1    30.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 124 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43L  LEU*     3.8    18.8    -      -       +      -
     46L  ILE*     4.1    15.0    -      -       +      +
    104L  LEU*     3.8    19.4    -      -       +      +
    105L  LYS*     2.9    54.6    +      -       -      +
    106L  SER      3.7     4.0    +      -       -      -
    107L  TYR*     2.9    34.9    -      -       -      +
    108L  PRO*     3.6    14.6    -      -       -      +
    120L  GLU*     2.9    41.5    +      -       -      +
    121L  LEU*     3.2     4.8    +      -       -      +
    123L  ASP*     1.3    77.6    -      -       -      +
    125L  TYR*     1.3    66.0    +      -       -      +
    127L  ILE*     3.3     9.6    +      -       -      +
    128L  VAL*     3.1    26.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 125 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43L  LEU*     3.5    35.9    -      -       +      -
     47L  THR*     2.6    38.8    +      -       +      +
     66L  LEU*     5.5     0.2    -      -       +      -
     69L  PHE*     3.6    10.7    -      +       -      +
     73L  LEU*     3.4    12.2    -      -       +      +
    121L  LEU*     2.8    41.8    +      -       +      +
    122L  ALA      3.8     3.4    -      -       -      +
    124L  ARG*     1.3    72.5    -      -       -      +
    126L  ALA*     1.3    53.9    +      -       -      +
    128L  VAL*     3.2     1.9    +      -       -      +
    129L  ALA*     2.6    39.6    +      -       -      +
    155L  LEU*     4.3     9.1    -      -       +      +
    158L  PHE*     3.8    37.0    -      +       +      -
    159L  LEU*     4.1    13.7    -      -       +      -
    162L  ILE*     3.5    27.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 126 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18J  ARG*     3.4    32.5    -      -       +      +
    122L  ALA      2.8    19.7    +      -       -      +
    123L  ASP*     3.4     6.3    -      -       -      +
    124L  ARG      3.2     0.2    -      -       -      -
    125L  TYR*     1.3    77.6    -      -       -      +
    127L  ILE*     1.3    58.0    +      -       +      +
    129L  ALA*     4.2     0.2    -      -       -      -
    130L  ASN*     2.8    44.3    +      -       -      +
    159L  LEU*     3.9    14.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 127 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39L  GLN*     4.3    10.5    -      -       -      +
    103L  PRO*     4.5    16.8    -      -       +      +
    104L  LEU*     3.9    24.2    -      -       +      -
    105L  LYS*     5.5     3.4    -      -       +      +
    123L  ASP*     3.1    19.5    +      -       +      +
    124L  ARG*     3.6    13.5    -      -       -      +
    125L  TYR      3.2     0.2    -      -       -      -
    126L  ALA*     1.3    77.8    -      -       +      +
    128L  VAL*     1.3    62.4    +      -       -      +
    130L  ASN*     4.1     3.3    -      -       -      +
    131L  ASP*     3.0    28.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 128 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39L  GLN*     3.4    36.3    -      -       +      +
     40L  PHE*     3.6    27.1    -      -       +      -
     43L  LEU*     4.0    17.0    -      -       +      -
    104L  LEU*     3.9    17.9    -      -       +      -
    124L  ARG      3.1    13.9    +      -       -      +
    125L  TYR      3.8     3.8    -      -       -      +
    127L  ILE*     1.3    75.5    -      -       -      +
    129L  ALA*     1.3    58.0    +      -       -      +
    131L  ASP*     3.8     0.5    -      -       -      +
    132L  VAL*     2.9    30.0    +      -       -      +
    155L  LEU*     3.5    21.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 129 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125L  TYR      2.6    24.3    +      -       -      +
    126L  ALA*     3.7     5.6    -      -       -      +
    128L  VAL*     1.3    73.1    -      -       -      +
    130L  ASN*     1.3    56.8    +      -       -      +
    132L  VAL*     3.2     9.5    -      -       -      +
    133L  ARG*     3.0    36.6    +      -       -      +
    155L  LEU*     3.9    24.0    -      -       +      +
    156L  ASP*     3.7    17.3    -      -       -      +
    159L  LEU*     4.4    10.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 130 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18J  ARG      3.1    19.8    +      -       -      -
     19J  ASN*     3.6     3.9    -      -       -      -
     20J  ASP*     2.8    37.3    +      -       -      +
    126L  ALA*     2.8    31.1    +      -       -      +
    127L  ILE*     4.1     2.8    -      -       -      +
    129L  ALA*     1.3    73.4    -      -       -      +
    131L  ASP*     1.3    64.9    +      -       -      +
    133L  ARG*     2.5    35.2    +      -       -      +
    134L  LYS*     3.3    30.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 131 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35L  ARG*     2.8    41.2    +      -       -      -
     36L  GLN*     3.6     2.5    -      -       -      +
     39L  GLN*     3.0    28.2    +      -       -      +
    103L  PRO*     5.8     0.2    -      -       -      +
    127L  ILE*     3.0    20.9    +      -       +      +
    128L  VAL      3.8     2.2    -      -       -      +
    130L  ASN*     1.3    74.9    -      -       -      +
    132L  VAL*     1.3    67.3    +      -       -      +
    134L  LYS*     3.0    19.2    +      -       -      +
    135L  ALA      3.0     8.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 132 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36L  GLN*     3.6    32.8    -      -       -      +
     40L  PHE*     4.3    20.4    -      -       +      -
    128L  VAL      2.9    19.9    +      -       -      +
    129L  ALA*     3.2    16.2    -      -       -      +
    131L  ASP*     1.3    74.4    -      -       -      +
    133L  ARG*     1.3    67.6    +      -       -      +
    135L  ALA*     3.1    10.4    +      -       -      +
    136L  ILE*     3.3    13.2    +      -       -      +
    148L  LEU*     3.9    32.1    -      -       +      +
    151L  ALA*     4.7     0.7    -      -       +      -
    152L  SER*     4.0    21.1    -      -       -      +
    155L  LEU*     4.8     3.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 133 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19J  ASN*     2.9    23.2    +      -       -      +
     20J  ASP*     3.1    13.9    +      -       -      -
     21J  VAL*     3.2    23.0    -      -       -      +
     83J  ARG*     4.1     5.4    -      -       -      +
    141J  ASP*     4.2     7.6    -      -       -      +
    142J  ASP*     4.4     7.9    -      -       +      +
    143J  ASP*     4.0     8.3    -      -       -      +
    129L  ALA*     3.0    19.2    +      -       -      +
    130L  ASN*     2.5    34.9    +      -       -      +
    131L  ASP      3.1     0.4    -      -       -      -
    132L  VAL*     1.3    76.8    -      -       -      +
    134L  LYS*     1.3    64.3    +      -       +      +
    136L  ILE*     3.3    24.9    -      -       +      +
    137L  GLY      4.4     0.2    +      -       -      -
    152L  SER*     3.7    15.0    -      -       -      +
    156L  ASP*     2.6    43.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 134 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20J  ASP*     2.4    42.6    +      -       -      -
    130L  ASN*     3.3    22.2    +      -       -      +
    131L  ASP*     3.0    10.1    +      -       -      +
    133L  ARG*     1.3    75.9    -      -       +      +
    135L  ALA*     1.3    67.1    +      -       -      +
    136L  ILE      2.9     3.5    +      -       -      -
    137L  GLY*     3.1    11.7    +      -       -      +
    138L  GLU*     3.3    14.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 135 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32L  LEU*     3.9    19.6    -      -       +      +
     35L  ARG*     4.4     4.0    -      -       -      +
     36L  GLN*     3.6    22.9    -      -       -      +
    131L  ASP*     3.0     7.9    +      -       -      +
    132L  VAL*     3.1    10.7    +      -       -      +
    134L  LYS*     1.3    77.2    -      -       -      +
    136L  ILE*     1.3    56.7    +      -       -      +
    138L  GLU*     3.5    13.4    -      -       -      +
    139L  ALA*     2.9    31.0    +      -       -      +
    148L  LEU*     3.7    12.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 136 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142J  ASP*     3.7    28.7    -      -       +      +
    143J  ASP*     3.5    17.7    -      -       -      +
    132L  VAL      3.5     8.7    -      -       -      +
    133L  ARG*     3.3    18.6    -      -       +      +
    134L  LYS      2.9     0.4    -      -       -      -
    135L  ALA*     1.3    78.5    -      -       -      +
    137L  GLY*     1.3    63.3    +      -       -      +
    139L  ALA*     3.2    21.5    +      -       -      +
    145L  ALA*     3.9    14.4    -      -       +      +
    148L  LEU*     3.9    21.1    -      -       +      -
    149L  THR*     3.5    38.6    -      -       -      +
    152L  SER*     3.7    11.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 137 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142J  ASP*     4.3     9.8    +      -       -      -
    133L  ARG      4.4     0.4    +      -       -      -
    134L  LYS*     3.1     7.4    +      -       -      +
    136L  ILE*     1.3    81.4    -      -       -      +
    138L  GLU*     1.3    59.8    +      -       -      +
    139L  ALA      3.2     5.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 138 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32L  LEU*     3.6    29.5    -      -       +      +
     35L  ARG*     3.8    14.2    +      -       -      -
    134L  LYS*     3.3    13.6    +      -       -      +
    135L  ALA*     3.1    13.2    +      -       -      +
    137L  GLY*     1.3    76.6    -      -       -      +
    139L  ALA*     1.3    61.3    +      -       -      +
    140L  LYS*     3.5    11.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 139 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32L  LEU*     4.0    15.7    -      -       +      -
    135L  ALA      2.9    11.0    +      -       -      +
    136L  ILE      3.3    16.3    -      -       -      +
    137L  GLY      3.2     5.2    -      -       -      +
    138L  GLU*     1.3    77.0    -      -       -      +
    140L  LYS*     1.3    63.8    +      -       -      +
    141L  ASP      4.3     1.8    -      -       -      +
    144L  THR*     4.4     5.8    -      -       +      -
    145L  ALA*     3.9    31.4    -      -       +      +
    148L  LEU*     4.1     5.2    -      -       +      -
----------------------------------------------------------
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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