Contacts of the helix formed by residues 97 - 119 (chain A) in PDB entry 3SJN


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 GLY 97 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96A  ARG*     1.3    72.7    -      -       -      +
     98A  ALA*     1.3    66.8    +      -       -      -
    100A  ILE*     2.9    13.9    +      -       -      +
    101A  HIS*     3.2    20.7    +      -       -      -
    254A  THR*     2.9    21.5    +      -       -      -
     94B  GLY      4.2     8.3    -      -       -      -
     95B  ARG*     4.6     3.6    -      -       -      +
     96B  ARG*     3.6    17.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 98 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46A  SER*     4.7     4.3    -      -       -      +
     50A  VAL*     3.6    29.8    -      -       +      -
     51A  VAL*     4.8     3.8    -      -       +      +
     54A  CYS*     4.2     4.3    -      -       -      -
     96A  ARG      3.6     1.2    +      -       -      -
     97A  GLY*     1.3    70.8    -      -       -      -
     99A  GLY*     1.3    62.4    +      -       -      +
    101A  HIS*     3.1    17.8    +      -       -      +
    102A  ALA*     3.1    20.4    +      -       -      +
     93B  MET*     3.4    23.0    +      -       -      +
     96B  ARG      4.4     2.4    +      -       -      -
     98B  ALA*     4.5    15.9    -      -       +      +
     99B  GLY      5.3     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 99 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54A  CYS*     3.9    19.0    -      -       -      -
     67A  LEU*     4.5     1.6    -      -       -      +
     90A  SER*     5.2     1.0    +      -       -      -
     93A  MET*     4.6     6.3    +      -       -      -
     94A  GLY*     3.9    21.8    -      -       -      -
     96A  ARG      4.2     3.2    +      -       -      -
     97A  GLY      3.3     1.0    -      -       -      -
     98A  ALA*     1.3    77.5    -      -       -      +
    100A  ILE*     1.3    59.8    +      -       -      +
    102A  ALA*     3.4     5.0    +      -       -      +
    103A  ILE*     3.1    31.1    +      -       -      +
     98B  ALA*     5.2     1.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 100 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83A  TRP*     5.1     4.0    -      -       +      -
     87A  TYR*     3.9    16.6    -      -       +      -
     95A  ARG      3.4    45.3    -      -       -      +
     96A  ARG*     3.7     9.4    -      -       -      -
     97A  GLY      2.9     7.0    +      -       -      +
     99A  GLY*     1.3    72.6    -      -       -      +
    101A  HIS*     1.3    61.3    +      -       -      +
    103A  ILE*     3.3    15.8    +      -       +      +
    104A  SER*     2.9    30.5    +      -       -      -
    254A  THR*     3.7    10.5    -      -       -      +
    255A  THR*     3.9    15.3    -      -       +      -
    277A  ARG      3.5    13.9    -      -       -      +
    278A  CYS      3.6     8.3    -      -       -      +
    279A  GLY*     3.6    18.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 101 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44A  ALA*     3.4    13.2    -      -       +      +
     46A  SER*     2.7    36.4    +      -       -      -
     51A  VAL*     4.5     0.9    -      -       +      -
     97A  GLY*     3.4    20.8    +      -       -      -
     98A  ALA*     3.1    13.6    +      -       -      +
    100A  ILE*     1.3    77.2    -      -       -      +
    102A  ALA*     1.3    61.7    +      -       -      +
    104A  SER*     3.2    17.1    +      -       -      -
    105A  ALA      3.3    10.0    +      -       -      -
    254A  THR*     3.5    13.6    -      -       +      +
    276A  THR      4.0     7.9    -      -       -      +
    277A  ARG*     3.2    62.6    +      -       +      -
     92B  TYR      3.3    11.9    -      -       -      -
     93B  MET*     4.4     4.7    -      -       -      -
     94B  GLY      5.6     0.2    -      -       -      -
     95B  ARG*     5.7     0.2    +      -       -      -
----------------------------------------------------------
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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
----------------------------------------------------------
     51A  VAL*     4.2    19.2    -      -       +      +
     54A  CYS*     3.6    28.9    -      -       +      -
     55A  ILE*     4.1    10.4    -      -       +      +
     67A  LEU*     3.7    12.8    -      -       +      -
     98A  ALA      3.1     9.1    +      -       -      +
     99A  GLY      3.5     9.6    -      -       -      +
    100A  ILE      3.2     0.2    -      -       -      -
    101A  HIS*     1.3    76.8    -      -       -      +
    103A  ILE*     1.3    61.5    +      -       -      +
    105A  ALA*     3.4     6.6    +      -       -      +
    106A  ILE*     3.3    24.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 103 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67A  LEU*     3.8    18.2    -      -       +      -
     83A  TRP*     3.5    39.0    -      -       +      +
     86A  MET*     3.9    39.4    -      -       +      +
     87A  TYR*     3.9    20.9    -      -       +      +
     90A  SER*     4.1     6.5    -      -       -      +
     95A  ARG      5.9     0.4    -      -       -      +
     99A  GLY      3.1    16.6    +      -       -      +
    100A  ILE*     3.3    24.9    +      -       +      +
    102A  ALA*     1.3    71.2    -      -       -      +
    104A  SER*     1.3    68.2    +      -       -      +
    106A  ILE*     3.2     3.6    +      -       -      +
    107A  ASP*     2.9    20.4    +      -       -      +
    279A  GLY*     4.1     1.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 104 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100A  ILE      2.9    12.5    +      -       -      -
    101A  HIS      3.2     8.3    +      -       -      -
    103A  ILE*     1.3    76.6    -      -       -      +
    105A  ALA*     1.3    56.9    +      -       -      +
    107A  ASP*     3.2     1.4    +      -       -      +
    108A  ILE*     2.9    35.9    +      -       -      +
    275A  ILE      3.6     3.1    -      -       -      -
    276A  THR      3.5    20.6    -      -       -      -
    277A  ARG      3.3     8.5    -      -       -      -
    279A  GLY      2.8    27.3    +      -       -      -
    280A  GLY*     3.5    18.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 105 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30A  VAL*     3.4    28.9    -      -       +      +
     42A  GLY*     3.4    11.6    -      -       -      -
     43A  GLU*     3.4    34.6    +      -       -      +
     44A  ALA*     3.9     5.8    -      -       +      +
     51A  VAL*     5.2     0.9    -      -       +      -
     55A  ILE*     5.2     0.4    -      -       +      -
    101A  HIS      3.3     6.6    +      -       -      +
    102A  ALA*     3.6    10.3    -      -       -      +
    103A  ILE      3.3     0.2    -      -       -      -
    104A  SER*     1.3    77.7    -      -       -      +
    106A  ILE*     1.3    64.0    +      -       -      +
    108A  ILE*     3.5     0.8    +      -       -      -
    109A  ALA      3.1    16.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 106 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7A  ILE*     4.2    20.6    -      -       +      -
     30A  VAL*     4.1    14.8    -      -       +      -
     32A  VAL*     4.4     9.4    -      -       +      -
     55A  ILE*     4.0    16.8    -      -       +      -
     67A  LEU*     3.7    41.7    -      -       +      -
     71A  LEU*     3.6    24.5    -      -       +      -
     86A  MET*     3.8    14.4    -      -       +      -
    102A  ALA      3.3     4.0    +      -       -      +
    103A  ILE      3.2     7.2    +      -       -      +
    105A  ALA*     1.3    76.0    -      -       -      +
    107A  ASP*     1.3    59.7    +      -       -      +
    109A  ALA*     3.1     5.1    +      -       -      +
    110A  LEU*     2.9    35.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 107 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79A  ILE*     3.4    11.8    -      -       -      +
     83A  TRP*     3.5    12.2    -      -       +      +
     86A  MET*     4.7     2.8    -      -       +      +
    103A  ILE*     2.9    17.3    +      -       +      +
    104A  SER      3.6     4.3    -      -       -      +
    106A  ILE*     1.3    76.4    -      -       -      +
    108A  ILE*     1.3    64.6    +      -       -      +
    110A  LEU*     3.1    10.9    +      -       -      +
    111A  TRP*     3.1    31.4    +      -       -      -
    279A  GLY      3.9    12.3    -      -       -      +
    280A  GLY*     4.2     0.2    -      -       -      -
    281A  ILE      2.8    28.4    +      -       -      -
    282A  THR*     2.5    35.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 108 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41A  VAL      3.6    15.0    -      -       -      +
     42A  GLY*     3.7     7.0    -      -       -      -
     43A  GLU      3.9     9.2    -      -       -      +
    104A  SER      2.9    19.3    +      -       -      +
    105A  ALA      3.7     4.0    -      -       -      +
    107A  ASP*     1.3    75.4    -      -       -      +
    109A  ALA*     1.3    62.1    +      -       -      +
    111A  TRP*     3.2     5.4    +      -       -      +
    112A  ASP*     3.1    20.1    +      -       -      +
    275A  ILE*     3.5    32.3    -      -       +      +
    276A  THR*     3.8    23.3    -      -       +      -
    280A  GLY*     4.3     6.7    -      -       -      -
    281A  ILE*     4.3    20.4    -      -       +      +
    307A  ILE*     4.5     5.4    -      -       +      -
    311A  ALA*     4.1    12.1    -      -       +      -
    358A  LEU*     3.7    17.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 109 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30A  VAL*     4.2     2.7    -      -       +      -
     32A  VAL*     3.7    19.3    -      -       +      -
     40A  GLY*     3.4    29.4    -      -       -      +
     41A  VAL      3.6    11.2    -      -       -      +
     42A  GLY      3.7    11.4    -      -       -      +
    105A  ALA      3.1     9.1    +      -       -      +
    106A  ILE      3.1     9.4    +      -       -      +
    108A  ILE*     1.3    77.5    -      -       -      +
    110A  LEU*     1.3    57.4    +      -       -      +
    112A  ASP*     3.3     3.9    -      -       -      +
    113A  ILE*     2.9    26.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 110 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4A  ILE*     4.1    15.0    -      -       +      -
     32A  VAL*     4.2    15.9    -      -       +      -
     71A  LEU*     4.6     2.0    -      -       +      -
     76A  ALA*     3.7    32.6    -      -       +      +
     79A  ILE*     3.5    33.6    -      -       +      +
     82A  LEU*     3.9    29.6    -      -       +      -
     86A  MET*     4.7     3.6    -      -       +      -
    106A  ILE*     2.9    32.8    +      -       +      +
    107A  ASP*     3.1    11.6    +      -       -      +
    109A  ALA*     1.3    75.2    -      -       -      +
    111A  TRP*     1.3    56.8    +      -       -      +
    113A  ILE*     3.3     7.6    +      -       +      +
    114A  ALA*     2.9    23.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 111 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79A  ILE*     3.7    26.0    -      -       +      +
    107A  ASP*     3.1    38.9    +      -       -      -
    108A  ILE      3.2     6.9    +      -       -      +
    110A  LEU*     1.3    73.7    -      -       -      +
    112A  ASP*     1.3    58.8    +      -       -      +
    114A  ALA*     3.3     1.9    +      -       -      +
    115A  GLY      2.9    24.8    +      -       -      -
    122A  VAL*     3.2    31.4    -      -       +      +
    125A  LEU*     3.8    40.1    -      -       +      +
    126A  LEU*     3.7    22.9    -      -       +      -
    281A  ILE*     3.6    31.6    -      -       +      -
    282A  THR*     3.0    36.2    +      -       +      +
    285A  LYS*     5.7     2.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 112 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39A  VAL      4.0     1.0    -      -       -      +
     40A  GLY*     3.5     4.9    -      -       -      -
     41A  VAL*     2.9    31.8    +      -       -      +
    108A  ILE      3.1    11.9    +      -       -      +
    109A  ALA      3.3     9.9    -      -       -      +
    111A  TRP*     1.3    75.6    -      -       -      +
    113A  ILE*     1.3    62.4    +      -       -      +
    115A  GLY      3.4     0.2    +      -       -      -
    116A  GLN*     3.1    48.1    +      -       -      +
    122A  VAL*     4.1     1.0    -      -       -      +
    356A  PRO      4.7     0.2    -      -       -      +
    357A  GLY*     3.5     3.1    -      -       -      -
    358A  LEU*     2.9    45.4    +      -       +      +
    359A  GLY      4.3     2.3    +      -       -      -
    360A  ILE*     4.7     9.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 113 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2A  LEU*     3.6    29.8    -      -       +      -
     32A  VAL*     3.5    42.6    -      -       +      +
     34A  THR*     3.8    15.9    -      -       +      -
     38A  ILE*     3.9    17.5    -      -       +      +
     39A  VAL      4.0     2.9    -      -       -      -
     40A  GLY      3.4    19.1    -      -       -      +
     76A  ALA*     4.2     8.5    -      -       +      -
     77A  LEU*     4.9     1.1    -      -       +      -
    109A  ALA      2.9    14.8    +      -       -      +
    110A  LEU*     3.4    16.8    -      -       +      +
    112A  ASP*     1.3    76.3    -      -       -      +
    114A  ALA*     1.3    59.0    +      -       -      +
    116A  GLN*     3.3     2.9    +      -       -      +
    117A  PHE*     2.9    28.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 114 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77A  LEU*     4.0    20.2    -      -       +      +
     79A  ILE*     4.1    17.0    -      -       +      -
    110A  LEU      2.9    15.2    +      -       -      +
    111A  TRP*     3.3     4.9    +      -       +      +
    113A  ILE*     1.3    77.5    -      -       -      +
    115A  GLY*     1.3    64.7    +      -       -      +
    117A  PHE      3.3     0.2    +      -       -      -
    118A  TYR*     2.9    44.2    +      -       +      -
    125A  LEU*     3.8    14.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 115 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111A  TRP      2.9    13.3    +      -       -      -
    114A  ALA*     1.3    77.6    -      -       -      +
    116A  GLN*     1.3    50.7    +      -       -      +
    118A  TYR      3.7     0.2    -      -       -      -
    119A  GLY*     2.8    29.8    +      -       -      -
    120A  VAL*     2.9    30.1    +      -       -      -
    122A  VAL*     4.7     1.6    -      -       -      -
    125A  LEU*     3.7    12.5    -      -       -      +
    357A  GLY*     3.4    14.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 116 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38A  ILE*     3.6    25.7    -      -       +      +
     39A  VAL      2.9    29.2    +      -       -      +
    112A  ASP*     3.1    38.0    +      -       -      +
    113A  ILE      3.6     5.2    -      -       -      +
    115A  GLY*     1.3    72.9    -      -       -      +
    117A  PHE*     1.3    66.4    +      -       -      +
    119A  GLY*     3.3    11.6    +      -       -      -
    356A  PRO*     4.1    24.9    -      -       +      +
    357A  GLY      3.6     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 117 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2A  LEU*     4.0    27.6    -      -       +      -
     36A  LYS*     3.7    37.0    -      -       +      -
     38A  ILE*     3.7    16.0    -      -       +      +
     77A  LEU*     3.7    25.6    -      -       +      -
    113A  ILE      2.9    20.8    +      -       -      +
    114A  ALA      3.8     2.7    -      -       -      +
    116A  GLN*     1.3    74.9    -      -       -      +
    118A  TYR*     1.3    85.3    +      +       -      +
    119A  GLY      3.5     0.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 118 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77A  LEU*     3.6    30.9    +      -       +      +
    114A  ALA*     2.9    40.7    +      -       +      +
    117A  PHE*     1.3    96.4    -      +       -      +
    119A  GLY*     1.3    61.9    +      -       -      +
    120A  VAL*     3.7    20.1    +      -       +      +
    125A  LEU*     3.7    24.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 119 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115A  GLY      2.8    10.5    +      -       -      -
    116A  GLN      3.3     7.8    +      -       -      -
    117A  PHE      3.3     4.2    +      -       -      -
    118A  TYR*     1.3    78.1    -      -       -      +
    120A  VAL*     1.3    61.0    +      -       -      +
    121A  PRO*     4.8     0.3    -      -       -      +
    356A  PRO*     4.1    20.0    -      -       -      +
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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