Contacts of the helix formed by residues 169 - 193 (chain A) in PDB entry 4EVI


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 ALA 169 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165A  CYS      4.4     2.0    +      -       -      -
    167A  GLU      3.9     2.6    +      -       -      -
    168A  ASP*     1.3    73.4    +      -       -      +
    170A  ASN*     1.3    58.5    +      -       -      +
    172A  SER*     3.7     6.9    -      -       -      -
    173A  GLN*     2.9    29.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 170 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124A  HIS*     4.9     9.9    +      -       -      -
    168A  ASP*     3.3     7.5    +      -       -      +
    169A  ALA*     1.3    75.1    -      -       -      +
    171A  PHE*     1.3    82.2    +      -       -      +
    173A  GLN*     3.0    15.2    +      -       -      +
    174A  LEU*     3.1    30.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 171 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121A  CYS*     3.8    40.2    -      -       -      -
    124A  HIS*     3.9    17.7    -      +       +      +
    126A  HIS*     3.8    37.0    -      +       +      -
    127A  LEU*     4.0    20.6    -      -       +      -
    152A  PHE*     5.3     0.9    -      +       -      -
    161A  VAL*     4.2    22.9    -      -       +      -
    164A  VAL*     4.6    10.5    -      -       +      -
    165A  CYS*     4.3    11.9    -      -       -      -
    168A  ASP*     3.0    26.2    +      -       -      +
    170A  ASN*     1.3    84.9    -      -       -      +
    172A  SER*     1.3    63.7    +      -       -      +
    174A  LEU*     3.3    10.5    +      -       +      +
    175A  PHE*     3.1    22.5    +      +       +      +
    329A  PHE*     5.9     0.7    -      +       -      -
----------------------------------------------------------
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Residues in contact with SER 172 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165A  CYS*     3.2    43.5    +      -       -      +
    168A  ASP      2.9    20.1    +      -       -      -
    169A  ALA*     3.7     7.9    -      -       -      -
    171A  PHE*     1.3    79.6    -      -       -      +
    173A  GLN*     1.3    57.0    +      -       -      +
    175A  PHE*     3.3     2.4    +      -       -      +
    176A  SER*     3.0    31.8    +      -       -      -
    234A  HIS*     3.8    15.2    +      -       -      -
    235A  VAL*     5.7     0.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 173 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169A  ALA      2.9    19.7    +      -       -      +
    170A  ASN*     3.0     8.0    +      -       -      +
    172A  SER*     1.3    75.4    -      -       -      +
    174A  LEU*     1.3    61.0    +      -       +      +
    176A  SER*     3.3     7.1    +      -       -      -
    177A  GLU*     2.8    50.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 174 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117A  SER*     3.5    36.2    -      -       -      +
    120A  PHE*     3.9    31.2    -      -       +      +
    121A  CYS*     3.9    21.4    -      -       +      +
    124A  HIS*     4.7    10.1    -      -       +      -
    170A  ASN*     3.1    35.4    +      -       -      +
    171A  PHE*     3.3    11.9    +      -       +      +
    173A  GLN*     1.3    76.1    -      -       +      +
    175A  PHE*     1.3    56.2    +      -       -      +
    177A  GLU*     4.5     3.8    -      -       -      +
    178A  GLY*     2.8    26.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 175 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118A  LEU*     5.0     1.6    -      -       +      -
    121A  CYS*     3.9    14.8    -      -       -      -
    161A  VAL*     4.8     3.4    -      -       +      -
    162A  TYR*     3.8    30.7    -      +       -      -
    165A  CYS*     4.1    19.5    -      -       -      -
    171A  PHE*     3.1    13.1    +      +       +      +
    172A  SER*     3.7     9.2    -      -       -      +
    174A  LEU*     1.3    79.4    -      -       -      +
    176A  SER*     1.3    57.2    +      -       -      +
    178A  GLY*     3.3     1.7    +      -       -      -
    179A  MET*     3.0    57.2    +      -       +      +
    329A  PHE*     4.0    30.7    -      +       -      -
    330A  LEU*     5.1     0.2    -      -       +      -
    401A  SAH      4.8     2.0    -      -       -      -
    402A  C9M      3.9    36.3    -      +       +      -
----------------------------------------------------------
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Residues in contact with SER 176 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172A  SER*     3.0    19.5    +      -       -      -
    173A  GLN*     3.3     9.7    +      -       -      -
    175A  PHE*     1.3    72.8    -      -       -      +
    177A  GLU*     1.3    64.2    +      -       -      +
    179A  MET*     3.3     8.3    +      -       -      +
    180A  ALA*     2.9    28.6    +      -       -      +
    210A  GLY*     6.4     0.9    -      -       -      -
    211A  THR*     4.7    18.5    +      -       -      +
    235A  VAL*     5.3    13.9    -      -       -      -
    401A  SAH      6.1     0.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 177 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114A  ASN      5.4     1.2    -      -       -      +
    117A  SER*     2.7    36.4    +      -       -      +
    173A  GLN*     2.8    36.5    +      -       +      +
    174A  LEU*     4.4     5.0    -      -       -      +
    176A  SER*     1.3    73.7    -      -       -      +
    178A  GLY*     1.3    57.9    +      -       -      +
    180A  ALA*     3.2     8.0    +      -       -      +
    181A  GLY*     2.9    26.7    +      -       -      -
     -7B  GLY      4.8    11.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 178 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114A  ASN      6.0     1.3    -      -       -      -
    115A  ALA*     6.4     0.7    -      -       -      -
    117A  SER*     3.9     0.8    -      -       -      -
    118A  LEU*     3.8    36.5    -      -       -      +
    174A  LEU      2.8    18.5    +      -       -      -
    175A  PHE      3.6     2.0    -      -       -      -
    176A  SER      3.2     0.4    -      -       -      -
    177A  GLU*     1.3    78.7    -      -       -      +
    179A  MET*     1.3    69.2    +      -       -      +
    181A  GLY*     3.5     1.4    +      -       -      -
    182A  ASP*     3.4    19.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 179 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118A  LEU*     3.8    15.9    -      -       +      -
    175A  PHE*     3.0    42.3    +      -       +      +
    176A  SER*     3.7     7.6    -      -       -      +
    177A  GLU      3.3     0.4    -      -       -      -
    178A  GLY*     1.3    73.3    -      -       -      +
    180A  ALA*     1.3    61.0    +      -       -      +
    182A  ASP*     3.3     5.0    +      -       -      +
    183A  SER      2.9    24.1    +      -       -      -
    268A  TRP*     3.5    29.4    -      -       +      -
    401A  SAH      3.2    56.9    -      -       +      +
    402A  C9M      3.7    28.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 180 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112A  PRO      5.1     0.7    -      -       -      -
    176A  SER      2.9    17.7    +      -       -      +
    177A  GLU*     3.2     9.2    +      -       -      +
    179A  MET*     1.3    76.4    -      -       -      +
    181A  GLY*     1.3    62.6    +      -       -      +
    183A  SER*     3.3     6.1    +      -       -      -
    184A  TRP*     3.0    24.4    +      -       -      +
    211A  THR*     3.7    13.5    -      -       -      +
    213A  ASN*     3.5    26.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 181 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112A  PRO      3.9    18.4    -      -       -      -
    113A  TYR*     3.8    16.6    -      -       -      +
    114A  ASN      4.3    10.8    -      -       -      -
    177A  GLU      2.9    15.6    +      -       -      -
    178A  GLY      3.5     2.0    +      -       -      -
    179A  MET      3.3     0.2    -      -       -      -
    180A  ALA*     1.3    79.7    -      -       -      +
    182A  ASP*     1.3    62.1    +      -       -      +
    184A  TRP*     3.4    13.5    +      -       -      +
    185A  LEU*     3.6     4.9    +      -       -      +
     13B  GLN*     4.4     3.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 182 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118A  LEU*     5.8     2.2    -      -       +      -
    178A  GLY      3.4    10.2    +      -       -      +
    179A  MET      3.3     5.6    +      -       -      +
    180A  ALA      3.3     0.2    -      -       -      -
    181A  GLY*     1.3    76.6    -      -       -      +
    183A  SER*     1.3    56.7    +      -       -      +
    185A  LEU*     3.1     4.2    +      -       -      +
    186A  PHE*     2.8    26.6    +      -       -      +
    267A  LYS*     2.8    20.1    +      -       -      -
    268A  TRP*     3.5    21.3    -      -       +      -
    361A  ARG*     2.7    47.2    +      -       -      -
     10B  LEU*     4.0     0.7    -      -       -      +
     13B  GLN*     2.9    32.3    +      -       -      +
     17B  TRP*     3.7     4.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 183 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    179A  MET      2.9    11.9    +      -       -      -
    180A  ALA*     3.3     6.7    +      -       -      -
    182A  ASP*     1.3    76.6    -      -       -      +
    184A  TRP*     1.3    59.0    +      -       -      +
    186A  PHE*     4.4     0.2    -      -       -      -
    187A  SER*     2.8    33.3    +      -       -      -
    209A  GLY      5.8     0.2    +      -       -      -
    213A  ASN*     3.8    15.0    -      -       -      +
    214A  THR*     3.1    19.6    +      -       -      -
    267A  LYS*     3.2    11.7    +      -       -      +
    401A  SAH      2.4    34.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 184 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112A  PRO*     3.6    45.0    -      -       +      +
    113A  TYR*     3.5    32.1    -      +       +      -
    180A  ALA      3.0    11.7    +      -       -      +
    181A  GLY      3.4    12.1    -      -       -      +
    182A  ASP      3.2     0.2    -      -       -      -
    183A  SER*     1.3    78.4    -      -       -      +
    185A  LEU*     1.3    65.6    +      -       +      +
    187A  SER*     3.3     4.9    +      -       -      -
    188A  ARG*     2.8    75.3    +      -       -      +
    213A  ASN*     3.4    24.4    -      -       -      +
    241A  GLN*     5.5     1.8    -      -       -      -
      1B  MET*     3.8    33.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 185 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106A  LEU*     4.2     7.2    -      -       +      -
    113A  TYR*     3.6    25.6    -      -       +      -
    181A  GLY      3.6     1.5    +      -       -      +
    182A  ASP      3.1     5.9    +      -       -      +
    184A  TRP*     1.3   101.1    -      -       +      +
    186A  PHE*     1.3    65.8    +      -       -      +
    188A  ARG*     3.3     6.4    +      -       -      +
    189A  ALA*     3.2    20.6    +      -       -      +
      6B  ALA*     3.9    17.3    -      -       -      +
      9B  LEU*     3.6    45.1    -      -       +      +
     10B  LEU*     3.9    13.2    -      -       +      +
     13B  GLN*     3.8    29.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 186 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    182A  ASP*     2.8    24.3    +      -       -      +
    183A  SER      4.2     0.4    -      -       -      +
    185A  LEU*     1.3    73.2    -      -       -      +
    187A  SER*     1.3    60.6    +      -       -      +
    189A  ALA*     3.2     3.5    +      -       -      +
    190A  LEU*     2.8    45.4    +      -       +      +
    214A  THR*     5.7     0.4    -      -       +      -
    267A  LYS*     3.5    28.9    -      -       +      -
    301A  ALA*     3.6    32.1    -      -       +      -
    357A  VAL*     3.7    33.0    -      -       +      -
    358A  GLY      3.9     2.2    -      -       -      -
    361A  ARG*     3.9    39.5    -      -       +      -
    362A  VAL      4.5     5.6    -      -       -      -
     10B  LEU*     3.8    23.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 187 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    183A  SER*     2.8    22.7    +      -       -      +
    184A  TRP      3.3     4.9    +      -       -      -
    186A  PHE*     1.3    80.8    -      -       -      +
    188A  ARG*     1.3    65.0    +      -       -      +
    190A  LEU*     3.2    10.1    +      -       -      +
    191A  VAL*     3.1    30.0    +      -       -      +
    213A  ASN      3.5     2.4    +      -       -      -
    214A  THR*     3.7    30.5    -      -       -      -
    217A  VAL*     3.3    28.9    -      -       -      +
    218A  ILE*     5.7     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 188 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    184A  TRP*     2.8    84.6    +      -       -      +
    185A  LEU      3.3     3.9    +      -       -      +
    187A  SER*     1.3    83.6    +      -       -      +
    189A  ALA*     1.3    61.2    +      -       -      +
    191A  VAL*     3.6     6.1    -      -       -      +
    192A  SER*     3.5    19.2    +      -       -      -
    213A  ASN*     5.2     0.6    +      -       -      -
    217A  VAL*     3.4    29.4    -      -       +      +
    220A  GLU*     5.0     2.6    +      -       -      -
    403A  GOL      3.8    29.6    +      -       -      +
      1B  MET*     5.0    13.2    +      -       -      +
      3B  ALA*     4.6     7.6    -      -       -      +
      6B  ALA*     3.7    23.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 189 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    185A  LEU      3.2     9.6    +      -       -      +
    186A  PHE      3.5     7.2    -      -       -      +
    188A  ARG*     1.3    77.2    -      -       -      +
    190A  LEU*     1.3    57.0    +      -       -      +
    192A  SER*     3.2     3.1    +      -       -      -
    193A  LYS*     2.8    34.0    +      -       -      +
    357A  VAL*     3.5    10.5    -      -       +      +
      6B  ALA*     4.5     1.6    -      -       -      +
      7B  VAL*     3.8    30.5    -      -       +      +
     10B  LEU*     3.5    28.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 190 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    186A  PHE*     2.8    38.3    +      -       +      +
    187A  SER*     3.2     7.6    +      -       -      +
    189A  ALA*     1.3    77.8    -      -       -      +
    191A  VAL*     1.3    57.6    +      -       -      +
    194A  CYS*     2.8    58.2    +      -       +      +
    198A  PHE*     3.9    23.1    -      -       +      -
    214A  THR*     4.7    17.7    -      -       +      -
    218A  ILE*     4.7     7.0    -      -       +      -
    265A  LEU*     5.3     7.4    -      -       +      -
    301A  ALA*     5.2     5.8    -      -       +      -
    357A  VAL*     3.6    17.9    -      -       +      +
    363A  LEU*     4.2    20.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 191 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    187A  SER      3.1    19.1    +      -       -      +
    188A  ARG*     3.6     9.0    -      -       -      +
    190A  LEU*     1.3    77.9    -      -       +      +
    192A  SER*     1.3    62.7    +      -       -      +
    195A  ARG*     3.4    25.2    +      -       -      +
    198A  PHE*     4.4    10.8    -      -       +      -
    217A  VAL*     3.9    17.7    -      -       +      -
    218A  ILE*     4.2    21.5    -      -       +      -
    221A  THR*     3.7    26.7    -      -       +      +
    222A  PHE*     3.9    26.0    -      -       +      -
    403A  GOL      4.4     8.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 192 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    188A  ARG      3.6    11.2    -      -       -      -
    189A  ALA*     3.2     8.0    +      -       -      -
    190A  LEU      3.1     0.6    -      -       -      -
    191A  VAL*     1.3    83.2    -      -       -      +
    193A  LYS*     1.3    70.0    +      -       -      +
    194A  CYS      3.3     0.6    +      -       -      -
    195A  ARG*     3.8     9.6    +      -       -      +
      3B  ALA*     3.6    26.6    -      -       -      +
      7B  VAL*     5.6     1.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 193 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    189A  ALA      2.8    20.7    +      -       -      +
    192A  SER*     1.3    79.1    -      -       -      +
    194A  CYS*     1.3    64.9    +      -       -      +
    195A  ARG      3.6     0.8    +      -       -      -
    355A  THR*     3.9    12.1    -      -       +      +
    356A  PRO*     4.0    26.2    +      -       -      +
    357A  VAL*     3.0    33.5    +      -       -      +
    358A  GLY*     5.2     0.6    -      -       -      -
      7B  VAL*     4.2    28.0    -      -       +      +
     11B  ASP*     5.3     1.8    +      -       -      -
----------------------------------------------------------
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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