Contacts of the helix formed by residues 88 - 111 (chain A) in PDB entry 2C8U


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 88 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86A  GLY      4.2     0.9    -      -       -      -
     87A  GLY*     1.3    82.7    +      -       -      +
     89A  GLU*     1.3    60.1    +      -       -      +
     90A  GLU*     3.5     8.7    +      -       -      +
     91A  GLU*     3.0    29.6    +      -       +      +
     92A  TYR*     2.9    28.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 89 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88A  THR*     1.3    73.6    -      -       -      +
     90A  GLU*     1.3    57.9    +      -       -      +
     92A  TYR*     3.5     8.8    +      -       -      +
     93A  TYR      3.0    22.5    +      -       -      -
     77B  TYR*     3.2    29.9    +      -       +      +
     80B  LYS*     4.3    31.1    +      -       +      +
     81B  LYS*     3.7    40.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 90 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88A  THR*     3.2     7.9    +      -       -      +
     89A  GLU*     1.3    76.2    -      -       -      +
     91A  GLU*     1.3    67.4    +      -       +      +
     93A  TYR*     3.5    10.5    +      -       +      +
     94A  ASN*     2.9    43.8    +      -       -      +
     66B  LYS*     6.0     1.9    -      -       -      +
     77B  TYR*     4.0    13.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 91 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86A  GLY*     3.8     7.4    -      -       -      -
     87A  GLY*     3.0    28.9    +      -       -      +
     88A  THR*     3.0    26.3    +      -       -      +
     90A  GLU*     1.3    75.0    -      -       +      +
     92A  TYR*     1.3    59.9    +      -       -      +
     94A  ASN*     3.2     5.7    +      -       -      +
     95A  VAL*     2.8    32.1    +      -       -      +
    147A  THR*     4.4     6.2    +      -       -      +
    152A  VAL*     3.7    20.6    -      -       +      +
    153A  GLY*     4.0    20.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 92 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85A  MET*     3.5    51.2    +      -       +      +
     86A  GLY      5.3     0.4    -      -       -      +
     88A  THR      2.9    13.0    +      -       -      +
     89A  GLU*     3.5    13.2    -      -       -      +
     91A  GLU*     1.3    75.8    -      -       -      +
     93A  TYR*     1.3    63.9    +      -       -      +
     95A  VAL*     3.1     2.1    +      -       -      +
     96A  GLU*     2.9    34.6    +      -       +      +
     76B  ARG*     3.5    44.6    -      -       +      +
     77B  TYR*     4.2     5.2    -      -       -      -
     80B  LYS*     3.8    29.2    -      -       +      -
     85B  MET*     3.5    20.8    -      -       -      +
     92B  TYR*     4.1    14.0    -      +       -      -
----------------------------------------------------------
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Residues in contact with TYR 93 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89A  GLU      3.0     9.3    +      -       -      +
     90A  GLU*     3.8    12.6    -      -       -      +
     91A  GLU      3.4     0.4    -      -       -      -
     92A  TYR*     1.3    76.4    -      -       -      +
     94A  ASN*     1.3    80.8    +      -       -      +
     96A  GLU*     3.2     6.0    +      -       -      +
     97A  LYS*     2.7    46.1    +      -       +      +
     67B  TRP      4.6     3.9    +      -       -      -
     68B  MET*     3.4    37.2    -      -       +      -
     69B  VAL*     2.7    45.8    +      -       -      +
     73B  ALA*     3.7    18.6    -      -       +      -
     74B  ILE*     3.9    10.5    -      -       +      -
     77B  TYR*     3.5    30.1    -      +       +      -
----------------------------------------------------------
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Residues in contact with ASN 94 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90A  GLU*     2.9    40.0    +      -       -      +
     91A  GLU*     3.6     9.3    -      -       -      +
     93A  TYR*     1.3    84.4    -      -       -      +
     95A  VAL*     1.3    64.8    +      -       -      +
     97A  LYS*     3.3    28.7    -      -       -      +
     98A  LEU*     3.3    19.9    +      -       -      +
    151A  ALA      5.7     0.4    -      -       -      +
    152A  VAL*     3.5    26.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 95 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85A  MET*     3.8    36.3    -      -       +      +
     86A  GLY      4.1     0.7    -      -       -      +
     91A  GLU      2.8    20.4    +      -       -      +
     92A  TYR      3.1     8.0    +      -       -      +
     94A  ASN*     1.3    71.8    -      -       -      +
     96A  GLU*     1.3    58.8    +      -       -      +
     98A  LEU      3.4     2.1    +      -       -      -
     99A  ILE*     2.9    46.1    +      -       +      +
    152A  VAL*     3.8    12.6    -      -       +      -
    157A  THR*     3.5    35.0    -      -       +      +
    158A  LEU*     4.5     0.9    -      -       +      -
    159A  ALA*     3.8    17.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 96 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76A  ARG*     2.6    51.0    +      -       -      -
     85A  MET*     3.5    15.2    -      -       +      +
     92A  TYR*     2.9    35.9    +      -       +      +
     93A  TYR*     3.7     5.8    -      -       -      +
     95A  VAL*     1.3    74.3    -      -       -      +
     97A  LYS*     1.3    58.3    +      -       -      +
     99A  ILE*     3.8     4.9    -      -       -      +
    100A  GLY*     2.9    27.2    +      -       -      -
   1208A  BME      4.2     2.8    -      -       -      +
     73B  ALA*     3.6    23.7    -      -       +      +
     76B  ARG*     3.3    30.1    +      -       +      -
     92B  TYR*     4.2     0.2    +      -       -      -
     96B  GLU*     3.9     1.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 97 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93A  TYR*     2.7    50.6    +      -       +      +
     94A  ASN*     3.3    27.8    -      -       -      +
     96A  GLU*     1.3    72.0    -      -       -      +
     98A  LEU*     1.3    58.5    +      -       -      +
    100A  GLY*     3.2     3.3    +      -       -      -
    101A  GLN*     3.0    38.2    +      -       -      +
    142A  SER*     3.1    36.3    +      -       -      +
    145A  ALA*     5.4     5.9    -      -       -      +
     69B  VAL*     3.5    13.9    -      -       +      +
     70B  GLU*     3.7    20.3    -      -       +      +
     73B  ALA*     3.5     9.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 98 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94A  ASN      3.3    15.0    +      -       -      +
     97A  LYS*     1.3    76.2    -      -       -      +
     99A  ILE*     1.3    66.4    +      -       -      +
    101A  GLN*     3.8    10.0    -      -       +      +
    102A  ALA*     3.0    23.6    +      -       +      +
    139A  ILE*     4.4    14.6    -      -       +      -
    142A  SER*     3.8    28.5    -      -       -      -
    143A  LEU*     4.2    14.4    -      -       +      +
    151A  ALA*     3.4    32.3    -      -       +      +
    152A  VAL*     5.4     0.7    -      -       +      -
    159A  ALA*     3.5    29.6    -      -       +      +
    163A  LEU*     4.1    19.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 99 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72A  LEU*     4.7     6.3    -      -       +      -
     76A  ARG*     3.5    24.9    -      -       -      +
     85A  MET*     4.6     0.9    -      -       +      -
     95A  VAL*     2.9    41.5    +      -       +      +
     96A  GLU*     3.8    17.9    -      -       -      +
     98A  LEU*     1.3    76.0    -      -       -      +
    100A  GLY*     1.3    58.5    +      -       -      +
    102A  ALA*     3.7     1.6    -      -       -      +
    103A  GLU*     2.9    37.4    +      -       +      +
    158A  LEU*     3.8    27.1    -      -       +      -
    159A  ALA*     4.0    15.5    -      -       -      +
    162A  VAL*     4.3    20.6    -      -       +      +
   1208A  BME      3.9     6.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 100 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96A  GLU      2.9    15.6    +      -       -      -
     97A  LYS      3.2     4.5    +      -       -      -
     99A  ILE*     1.3    78.4    -      -       -      +
    101A  GLN*     1.3    55.2    +      -       -      +
    103A  GLU*     3.4     3.9    +      -       -      +
    104A  ASP*     3.0    36.1    +      -       -      +
   1208A  BME      3.7    24.9    -      -       -      +
     70B  GLU*     4.5     9.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 101 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97A  LYS*     3.0    29.2    +      -       -      +
     98A  LEU*     3.8    11.5    -      -       -      +
    100A  GLY*     1.3    73.4    -      -       -      +
    102A  ALA*     1.3    65.1    +      -       -      +
    104A  ASP*     3.3    11.7    +      -       -      +
    105A  LEU*     3.2    19.2    +      -       -      +
    135A  LEU*     4.5     5.2    -      -       +      +
    138A  ILE*     3.3    27.1    +      -       +      +
    139A  ILE*     4.0    20.3    -      -       +      +
    142A  SER*     2.7    37.1    +      -       -      -
     52B  ARG*     4.5     2.7    -      -       -      +
     69B  VAL*     4.1     5.9    -      -       -      +
     70B  GLU*     3.2    30.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 102 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98A  LEU*     3.0    17.4    +      -       +      +
     99A  ILE      3.7     0.2    -      -       -      +
    101A  GLN*     1.3    77.3    -      -       -      +
    103A  GLU*     1.3    59.3    +      -       -      +
    105A  LEU*     3.1     5.6    +      -       -      +
    106A  GLU*     2.8    26.9    +      -       -      +
    139A  ILE*     4.2    11.1    -      -       +      +
    162A  VAL*     3.7    27.4    -      -       +      +
    163A  LEU*     4.5    17.5    -      -       +      -
    166A  VAL*     3.5    15.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 103 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72A  LEU*     3.6    30.8    -      -       +      +
     99A  ILE*     2.9    26.9    +      -       +      +
    100A  GLY*     3.8     7.2    -      -       -      +
    101A  GLN      3.3     0.2    -      -       -      -
    102A  ALA*     1.3    72.8    -      -       -      +
    104A  ASP*     1.3    61.4    +      -       -      +
    106A  GLU*     3.5    24.7    -      -       -      +
    107A  HIS*     2.9    27.9    +      -       -      +
    110A  TYR*     4.7     6.2    +      -       -      -
    162A  VAL*     3.6    21.5    -      -       -      +
    166A  VAL*     4.4     3.8    -      -       -      +
   1208A  BME      4.9     9.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 104 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100A  GLY      3.0    19.5    +      -       -      +
    101A  GLN*     3.4     9.5    -      -       -      +
    102A  ALA      3.3     0.2    -      -       -      -
    103A  GLU*     1.3    76.4    -      -       -      +
    105A  LEU*     1.3    61.6    +      -       -      +
    107A  HIS*     3.4    16.6    +      -       -      +
    108A  GLU*     3.4    12.1    +      -       -      +
    135A  LEU*     3.5    24.6    -      -       +      +
     16B  ARG*     6.3     0.2    -      -       -      -
     52B  ARG*     2.8    35.6    +      -       -      +
     70B  GLU*     3.7     6.6    -      -       -      +
   1207B  SO4      5.2     0.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 105 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101A  GLN      3.2     8.3    +      -       -      +
    102A  ALA*     3.1    10.8    +      -       -      +
    104A  ASP*     1.3    77.1    -      -       -      +
    106A  GLU*     1.3    64.2    +      -       -      +
    108A  GLU*     3.1    16.0    +      -       +      +
    109A  TYR*     3.2    11.6    +      -       -      +
    132A  VAL*     3.9    42.0    -      -       +      +
    135A  LEU*     3.6    14.7    -      -       +      +
    136A  LEU*     3.7    27.1    -      -       +      -
    139A  ILE*     4.0    16.2    -      -       +      -
    166A  VAL*     3.7    15.9    -      -       +      -
    167A  ILE*     4.3     6.3    -      -       +      -
    170A  VAL*     3.9    20.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 106 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15A  GLY      5.6     1.4    -      -       -      +
     16A  ARG*     5.5     1.7    -      -       -      +
    102A  ALA      2.8    20.0    +      -       -      +
    103A  GLU*     3.5    23.4    -      -       -      +
    105A  LEU*     1.3    72.7    -      -       -      +
    107A  HIS*     1.3    56.3    +      -       -      +
    109A  TYR*     3.3    10.4    +      -       -      +
    110A  TYR*     2.8    71.7    +      -       +      +
    165A  ALA*     5.5     1.2    -      -       -      +
    166A  VAL*     3.5    21.1    -      -       +      +
    169A  HIS*     2.7    43.1    +      -       -      +
   1209A  BME      4.6     1.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 107 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103A  GLU      2.9    13.7    +      -       -      +
    104A  ASP*     3.4    13.7    -      -       -      +
    105A  LEU      3.2     0.4    -      -       -      -
    106A  GLU*     1.3    73.6    -      -       -      +
    108A  GLU*     1.3    82.6    +      -       -      +
    110A  TYR*     3.3    24.4    +      -       +      +
    111A  LYS*     3.4    27.7    +      -       +      +
    107B  HIS*     3.5    36.6    +      +       -      -
    110B  TYR*     6.0     6.3    -      +       +      -
----------------------------------------------------------
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Residues in contact with GLU 108 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104A  ASP      3.4    11.7    +      -       -      +
    105A  LEU      3.1     7.9    +      -       -      +
    107A  HIS*     1.3    85.8    -      -       -      +
    109A  TYR*     1.3    66.2    +      -       -      +
    111A  LYS*     2.7    55.8    +      -       -      +
    112A  THR      4.0     0.3    +      -       -      -
    127A  ILE*     3.3    30.6    -      -       +      +
    131A  LYS*     3.8    33.0    +      -       +      +
    132A  VAL*     3.8    23.1    -      -       +      -
    135A  LEU*     4.2     8.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 109 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14A  ARG*     5.1     2.8    +      -       -      +
    105A  LEU      3.2     8.5    +      -       -      +
    106A  GLU*     3.4    25.6    -      -       -      +
    108A  GLU*     1.3    76.9    -      -       -      +
    110A  TYR*     1.3    70.3    +      +       -      +
    112A  THR*     2.8    26.5    +      -       -      -
    113A  LEU*     3.4    31.2    -      -       +      +
    127A  ILE*     4.0     8.9    -      -       -      +
    132A  VAL*     5.4     0.6    -      -       -      +
    166A  VAL*     5.9     0.7    -      -       +      -
    169A  HIS*     3.4    61.7    +      +       +      -
    170A  VAL*     5.3     5.4    -      -       +      +
    172A  ASP*     4.3    10.0    +      -       +      -
    173A  LEU*     4.0    24.9    -      -       +      -
   1209A  BME      3.8    20.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 110 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16A  ARG*     3.5    27.7    -      -       +      +
    103A  GLU*     4.7     6.8    +      -       -      -
    106A  GLU*     2.8    52.0    +      -       +      +
    107A  HIS*     3.4    20.9    -      -       +      +
    108A  GLU      3.1     0.6    -      -       -      -
    109A  TYR*     1.3    79.9    -      +       -      +
    111A  LYS*     1.3    61.1    +      -       -      +
    112A  THR      3.0     1.5    +      -       -      -
    113A  LEU*     3.0    37.0    +      -       +      +
    115A  LYS*     5.9     0.2    +      -       -      -
   1209A  BME      3.4    36.1    -      -       +      +
    107B  HIS*     6.0     6.1    -      +       +      -
----------------------------------------------------------
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Residues in contact with LYS 111 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107A  HIS*     3.6    29.6    -      -       +      +
    108A  GLU*     2.7    52.3    +      -       -      +
    110A  TYR*     1.3    75.5    -      -       -      +
    112A  THR*     1.3    58.3    +      -       -      +
    113A  LEU      3.4     0.6    +      -       -      -
    115A  LYS*     3.8    13.5    +      -       -      +
    123A  ILE*     3.5    33.9    -      -       +      +
    126A  GLU*     5.3     8.8    +      -       -      +
    127A  ILE*     4.2     8.9    -      -       +      +
    131A  LYS*     5.5     2.4    -      -       -      +
----------------------------------------------------------
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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