Contacts of the helix formed by residues 93 - 120 (chain E) in PDB entry 4P9U


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 93 (chain E).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90E  ASP*     3.0    37.7    +      -       +      +
     91E  ALA      3.0     0.6    -      -       -      -
     92E  GLU*     1.3    86.1    +      -       -      +
     94E  ALA*     1.3    62.0    +      -       -      +
     95E  THR*     3.0     8.1    -      -       -      +
     96E  SER*     3.0    32.4    +      -       -      +
     97E  ILE*     3.4    11.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 94 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87E  MET*     3.6    32.5    -      -       +      +
     90E  ASP      3.3     4.6    +      -       -      +
     91E  ALA*     2.9    19.2    +      -       -      +
     93E  ASN*     1.3    77.8    -      -       -      +
     95E  THR*     1.3    62.7    +      -       -      +
     96E  SER      3.5     0.3    +      -       -      -
     97E  ILE*     4.1     1.6    -      -       -      -
     98E  VAL*     3.3    27.4    +      -       -      +
    263E  TRP*     5.3     0.5    -      -       -      -
    270E  LEU*     5.2     8.1    -      -       +      -
    274E  PHE*     4.9     6.2    -      -       +      -
    275E  THR*     3.9    15.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 95 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91E  ALA      4.6     0.8    +      -       -      -
     92E  GLU      4.5     9.0    +      -       -      -
     93E  ASN*     4.6     3.4    -      -       -      -
     94E  ALA*     1.3    81.2    -      -       -      +
     96E  SER*     1.3    63.1    +      -       -      +
     98E  VAL*     4.0     2.4    +      -       -      +
     99E  GLU*     2.9    43.2    +      -       -      +
    263E  TRP*     4.8     5.0    +      -       -      -
    267E  LYS*     4.0    26.3    -      -       +      +
    270E  LEU*     5.6     6.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 96 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93E  ASN*     3.0    26.3    +      -       -      +
     95E  THR*     1.3    78.8    -      -       -      +
     97E  ILE*     1.3    74.7    +      -       -      +
     99E  GLU*     2.9    21.8    +      -       -      +
    100E  ASP*     3.0    20.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 97 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83E  LEU*     3.7    30.8    -      -       +      +
     86E  LEU*     3.6    35.0    -      -       +      +
     87E  MET*     3.7    33.9    -      -       +      +
     90E  ASP*     5.0     2.9    -      -       +      +
     93E  ASN*     3.4    14.1    +      -       +      +
     94E  ALA*     4.2     1.3    -      -       -      +
     95E  THR      3.5     0.4    -      -       -      -
     96E  SER*     1.3    84.3    +      -       -      +
     98E  VAL*     1.3    64.0    +      -       -      +
    100E  ASP*     2.9    22.2    +      -       -      +
    101E  LEU*     3.0    10.9    +      -       -      +
    211E  LEU*     3.9    19.7    -      -       +      -
    199F  GLN*     4.9     6.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 98 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87E  MET*     4.1    17.9    -      -       +      -
     94E  ALA      3.3    17.9    +      -       -      +
     95E  THR      4.3     1.6    -      -       -      +
     96E  SER      3.3     0.4    -      -       -      -
     97E  ILE*     1.3    75.3    -      -       +      +
     99E  GLU*     1.3    58.8    +      -       -      +
    101E  LEU*     2.9    11.2    +      -       +      +
    102E  LEU*     2.7    40.4    +      -       +      +
    211E  LEU*     5.2     1.1    -      -       +      -
    215E  VAL*     3.7    41.3    -      -       +      -
    263E  TRP*     3.6    39.9    -      -       +      -
    274E  PHE*     4.6     2.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 99 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95E  THR*     2.9    41.8    -      -       -      +
     96E  SER*     2.9     8.0    +      -       -      +
     98E  VAL*     1.3    72.1    -      -       -      +
    100E  ASP*     1.3    63.6    +      -       -      +
    102E  LEU*     3.8     9.9    -      -       +      +
    103E  ALA*     3.0    27.9    +      -       -      +
    263E  TRP*     3.9    20.2    -      -       +      +
    264E  ASN*     5.2     2.5    -      -       -      +
    267E  LYS*     4.2    17.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 100 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83E  LEU*     5.7     2.6    -      -       +      +
     96E  SER*     3.0    18.7    +      -       -      +
     97E  ILE*     2.9    15.5    +      -       +      +
     99E  GLU*     1.3    77.6    -      -       -      +
    101E  LEU*     1.3    57.5    +      -       -      +
    103E  ALA*     2.9     2.2    +      -       -      +
    104E  ALA*     2.8    33.3    +      -       -      +
    197F  GLY      3.5    15.7    -      -       -      +
    198F  ASN*     3.3    31.5    +      -       -      +
    199F  GLN*     3.6    26.2    +      -       +      +
    200F  ILE*     3.9     9.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 101 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97E  ILE      3.0     9.9    +      -       -      +
     98E  VAL*     2.9    10.2    +      -       +      +
    100E  ASP*     1.3    76.5    -      -       -      +
    102E  LEU*     1.3    67.3    +      -       +      +
    104E  ALA*     4.1     0.7    -      -       +      +
    105E  ARG*     3.3    25.2    +      -       +      +
    208E  LEU*     3.9    29.8    -      -       +      +
    211E  LEU*     3.6    41.5    -      -       +      +
    212E  TYR*     4.1    29.8    -      -       +      -
    215E  VAL*     3.9    24.0    -      -       +      -
    200F  ILE*     3.6     9.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 102 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98E  VAL*     2.7    42.1    +      -       +      +
     99E  GLU*     4.1     7.9    -      -       +      +
    101E  LEU*     1.3    77.8    -      -       +      +
    103E  ALA*     1.3    58.3    +      -       -      +
    105E  ARG*     4.1    28.5    +      -       -      +
    106E  THR*     2.5    35.0    +      -       -      -
    215E  VAL*     4.9    10.8    -      -       +      -
    259E  SER*     5.6     2.5    -      -       -      +
    260E  GLY*     5.8     4.0    -      -       -      -
    263E  TRP*     3.9    33.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 103 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99E  GLU      3.0    18.8    +      -       -      +
    100E  ASP*     2.9     5.5    +      -       -      +
    102E  LEU*     1.3    75.4    -      -       -      +
    104E  ALA*     1.3    61.1    +      -       -      +
    106E  THR*     2.9     7.9    +      -       -      -
    107E  ASN*     2.8    40.5    +      -       -      +
    198F  ASN*     3.7    11.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 104 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100E  ASP      2.8    19.3    +      -       -      +
    101E  LEU*     4.1     1.3    -      -       +      +
    103E  ALA*     1.3    72.3    -      -       -      +
    105E  ARG*     1.3    63.6    +      -       -      +
    107E  ASN*     2.9     2.8    +      -       -      +
    108E  ILE*     2.9    35.4    +      -       +      +
    208E  LEU*     5.7     0.9    -      -       +      -
    198F  ASN*     3.5     9.3    -      -       -      +
    200F  ILE*     3.6    34.1    -      -       +      -
    201F  TYR*     3.9    18.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 105 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101E  LEU*     3.3    18.9    +      -       +      +
    102E  LEU*     4.1    26.5    +      -       -      +
    103E  ALA      3.3     0.6    -      -       -      -
    104E  ALA*     1.3    79.0    -      -       -      +
    106E  THR*     1.3    63.4    +      -       -      +
    108E  ILE*     4.3     8.3    -      -       -      -
    109E  SER*     2.2    45.2    +      -       -      +
    185E  ASP*     3.7    10.5    +      -       -      -
    189E  PHE*     3.6    29.6    -      -       +      -
    205E  PHE*     4.0    13.0    -      -       +      -
    212E  TYR*     3.0    42.7    +      -       +      -
    219E  TYR*     6.3     0.6    -      -       -      -
    220E  PHE*     6.1     0.6    -      -       -      -
    255E  TYR*     3.7    26.1    +      -       -      -
    256E  GLY*     6.2     0.4    -      -       -      -
    259E  SER*     4.7     7.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 106 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    102E  LEU      2.5    24.4    +      -       -      -
    103E  ALA*     2.9     8.1    +      -       -      -
    105E  ARG*     1.3    83.2    +      -       -      +
    107E  ASN*     1.3    63.6    +      -       -      +
    110E  PRO*     3.3    17.3    -      -       -      +
    252E  ILE*     3.8    31.0    -      -       +      +
    253E  ARG*     4.3    18.2    -      -       +      +
    256E  GLY*     4.1    18.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 107 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103E  ALA*     2.8    28.7    +      -       -      +
    104E  ALA      2.9     2.4    +      -       -      +
    106E  THR*     1.3    83.5    -      -       -      +
    108E  ILE*     1.3    58.9    +      -       -      +
    109E  SER      3.4     0.2    -      -       -      -
    110E  PRO*     3.3    14.0    -      -       -      +
    111E  ILE*     4.0     9.4    -      -       -      +
    111F  ILE*     3.7    26.9    -      -       +      +
    115F  TYR*     4.2    24.1    +      -       -      -
    198F  ASN*     4.6     0.8    -      -       -      +
    201F  TYR*     2.8    37.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 108 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104E  ALA*     2.9    26.2    +      -       +      +
    105E  ARG*     4.2     4.7    -      -       -      +
    107E  ASN*     1.3    76.6    -      -       +      +
    109E  SER*     1.3    66.2    +      -       -      +
    110E  PRO      3.4     1.3    -      -       -      -
    111E  ILE*     3.1    20.9    +      -       +      +
    112E  PHE*     3.0    26.8    +      -       +      -
    201E  TYR*     4.8    11.9    -      -       +      +
    204E  ILE*     4.4    34.8    -      -       +      -
    205E  PHE*     4.7    12.6    -      -       +      -
    108F  ILE*     4.4    16.6    -      -       +      -
    111F  ILE*     5.4     2.5    -      -       +      -
    200F  ILE*     6.3     0.9    -      -       +      -
    201F  TYR*     4.0    24.9    -      -       +      +
    204F  ILE*     5.8     3.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 109 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105E  ARG*     2.2    31.4    +      -       -      +
    108E  ILE*     1.3    72.7    -      -       -      +
    110E  PRO*     1.3    71.8    -      -       -      +
    111E  ILE      3.0     1.6    -      -       -      -
    112E  PHE*     3.4    17.4    -      -       -      -
    113E  MET*     3.1    37.3    +      -       -      +
    189E  PHE*     3.6    18.9    -      -       -      -
    252E  ILE*     3.6    20.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with PRO 110 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106E  THR      3.3    22.2    -      -       -      +
    107E  ASN      3.3    12.1    -      -       -      +
    109E  SER*     1.3    91.6    -      -       -      +
    111E  ILE*     1.3    59.4    +      -       +      +
    114E  ARG*     3.2    29.8    +      -       -      +
    248E  LEU*     3.7    14.8    -      -       +      +
    249E  PRO*     4.6    17.9    -      -       +      +
    252E  ILE*     3.4    24.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 111 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107E  ASN      4.0     7.6    -      -       -      +
    108E  ILE*     3.2    24.7    -      -       +      +
    109E  SER      3.0     1.2    -      -       -      -
    110E  PRO*     1.3    81.9    -      -       +      +
    112E  PHE*     1.3    60.3    +      -       -      +
    114E  ARG*     3.2    23.2    -      -       -      +
    115E  TYR*     3.4    16.2    -      -       +      -
    201E  TYR*     3.2    32.1    -      -       +      +
    107F  ASN*     3.7    34.3    -      -       +      +
    108F  ILE*     5.4     1.8    -      -       +      -
    111F  ILE*     4.9    12.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 112 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108E  ILE*     3.0    23.3    +      -       +      -
    109E  SER*     3.4    31.0    -      -       -      -
    111E  ILE*     1.3    76.1    -      -       -      +
    113E  MET*     1.3    99.4    +      -       +      +
    114E  ARG      3.2     1.8    -      -       -      -
    115E  TYR*     3.5     2.8    +      -       -      -
    116E  ALA*     3.0    28.2    +      -       -      +
    189E  PHE*     3.7    18.4    -      +       -      -
    192E  LEU*     3.6     5.6    -      -       +      -
    193E  ALA*     3.4    21.5    -      -       +      -
    196E  SER*     3.3    20.0    -      -       -      +
    201E  TYR*     3.8    33.0    -      +       +      -
    205E  PHE*     3.6    32.8    -      +       -      -
----------------------------------------------------------
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Residues in contact with MET 113 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109E  SER*     3.1    17.4    +      -       -      +
    112E  PHE*     1.3    95.5    -      -       +      +
    114E  ARG*     1.3    67.2    +      -       -      +
    116E  ALA*     3.0     6.5    +      -       -      +
    117E  PHE*     2.8    43.5    +      -       +      -
    188E  LEU*     4.4     2.2    -      -       +      -
    189E  PHE*     3.6    37.7    -      -       +      -
    192E  LEU*     4.1    22.4    -      -       +      -
    232E  PHE*     5.0     0.7    -      -       +      -
    236E  LEU*     4.0    34.1    -      -       +      -
    248E  LEU*     4.5     6.7    -      -       +      -
    252E  ILE*     3.8    22.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 114 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    110E  PRO      3.2    22.8    +      -       -      +
    111E  ILE*     3.2    11.0    -      -       -      +
    113E  MET*     1.3    82.0    -      -       -      +
    115E  TYR*     1.3    84.2    +      -       -      +
    117E  PHE*     3.0    13.4    +      -       -      +
    118E  LYS*     3.0    49.4    +      -       -      +
    245E  ARG*     3.8    36.4    -      -       +      +
    248E  LEU*     4.7     9.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 115 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111E  ILE*     3.4    23.3    +      -       +      +
    112E  PHE*     3.5     7.9    +      -       -      +
    114E  ARG*     1.3   104.1    -      -       -      +
    116E  ALA*     1.3    58.3    +      -       -      +
    118E  LYS*     3.0    15.3    +      -       -      -
    119E  LEU*     2.8    45.1    +      -       +      +
    196E  SER*     3.6    25.4    -      -       -      +
    198E  ASN*     6.3     1.6    -      -       +      -
    201E  TYR*     5.4     4.0    -      +       -      -
    107F  ASN*     3.8    34.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 116 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112E  PHE      3.0    19.0    +      -       -      +
    113E  MET*     3.0     9.2    +      -       -      +
    115E  TYR*     1.3    77.7    -      -       -      +
    117E  PHE*     1.3    66.1    +      -       +      +
    120E  ASN*     3.1    30.9    +      -       -      +
    124E  ALA*     4.0     2.1    -      -       +      +
    192E  LEU*     3.6    24.5    -      -       +      +
    195E  HIS*     3.2    28.2    -      -       +      +
    196E  SER*     4.0     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 117 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    113E  MET*     2.8    32.1    +      -       +      +
    114E  ARG*     3.0     6.7    +      -       -      +
    116E  ALA*     1.3    83.0    -      -       +      +
    118E  LYS*     1.3    60.2    +      -       +      +
    121E  LYS*     3.4    24.6    -      -       -      +
    124E  ALA*     3.9     9.2    -      -       +      -
    128E  MET*     3.8    26.9    -      -       +      -
    192E  LEU*     4.1    13.9    -      -       +      -
    236E  LEU*     3.9    23.1    -      -       +      -
    239E  VAL*     4.1    10.8    -      -       +      -
    240E  CYS*     3.5    40.1    -      -       +      +
    243E  GLY*     6.1     0.7    -      -       -      -
    245E  ARG*     5.4    10.1    -      -       +      -
    248E  LEU*     4.0    25.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 118 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114E  ARG*     3.0    41.8    -      -       -      +
    115E  TYR*     3.0    15.3    +      -       -      +
    117E  PHE*     1.3    83.0    -      -       -      +
    119E  LEU*     1.3    76.3    +      -       +      +
    120E  ASN      3.6     0.2    -      -       -      -
    121E  LYS*     4.3     5.8    +      -       -      +
    245E  ARG*     3.1    44.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 119 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115E  TYR*     2.8    32.0    +      -       +      +
    118E  LYS*     1.3    86.3    -      -       +      +
    120E  ASN*     1.3    73.4    -      -       -      +
    121E  LYS      3.7     1.7    +      -       -      -
    195E  HIS      4.8     2.7    -      -       -      +
    196E  SER      3.7    21.5    -      -       -      +
    197E  GLY*     4.6     7.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 120 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116E  ALA      3.1    12.3    +      -       -      +
    119E  LEU*     1.3    86.7    -      -       -      +
    121E  LYS*     1.3    64.3    +      -       -      +
    122E  GLU      3.5     1.8    -      -       -      -
    123E  SER*     4.0    22.1    +      -       -      +
    124E  ALA*     3.0    16.1    +      -       -      +
    195E  HIS*     3.6    43.0    +      -       +      +
    197E  GLY*     5.2     4.4    -      -       -      +
----------------------------------------------------------
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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