Contacts of the helix formed by residues 162 - 184 (chain A) in PDB entry 1ORR


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 HIS 162 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86A  MET*     5.1     1.6    -      -       -      +
    127A  LYS*     3.7    14.2    +      -       +      +
    130A  GLY*     3.7    13.7    -      -       -      -
    131A  ASP*     3.9    32.6    +      -       -      +
    160A  ASP*     3.0    47.7    +      -       -      -
    161A  PHE*     1.3    75.8    -      -       -      +
    163A  SER*     1.3    79.3    +      -       -      +
    166A  GLY*     3.2    10.3    -      -       -      -
    301A  SER*     3.5    18.3    +      -       -      +
    178C  ASP*     3.5     2.0    -      -       -      +
    181C  ARG*     3.3    33.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 163 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86A  MET*     3.5    38.1    -      -       -      +
     90A  ILE*     4.7     1.6    -      -       -      -
    162A  HIS*     1.3    80.1    +      -       -      +
    164A  PRO*     1.3    73.3    -      -       -      +
    165A  TYR*     3.3     4.9    +      -       -      +
    166A  GLY      2.8    13.3    +      -       -      -
    167A  CYS*     2.7    27.2    +      -       -      -
    301A  SER*     4.0     9.6    +      -       -      -
    178C  ASP*     2.8    22.9    +      -       -      +
    182C  ILE*     4.1     7.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 164 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89A  SER*     3.4    31.6    -      -       -      +
     90A  ILE*     3.8    12.6    -      -       +      -
     93A  PRO*     4.1    12.8    -      -       +      +
     96A  ASP*     2.9    14.9    -      -       -      +
    163A  SER*     1.3    88.1    -      -       -      +
    165A  TYR*     1.3    55.0    +      -       -      +
    167A  CYS*     3.1     7.9    +      -       +      +
    168A  SER*     2.8    26.9    +      -       -      -
    175C  TYR*     3.8    12.2    +      -       +      -
    178C  ASP*     3.6     8.7    -      -       -      +
    179C  TYR*     5.1     2.5    -      -       +      -
    182C  ILE*     4.4     4.9    -      -       +      -
    183C  PHE*     4.1    24.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 165 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83A  GLN*     3.1    29.4    -      -       -      -
     84A  VAL*     3.7    23.3    +      -       -      +
     86A  MET*     4.0    17.0    -      -       +      -
     89A  SER*     3.1    23.1    +      -       -      +
     96A  ASP*     3.5    13.0    -      -       -      -
    125A  THR*     3.6    27.9    +      -       +      -
    127A  LYS*     4.1    15.9    -      -       +      -
    163A  SER*     3.0     7.8    -      -       -      +
    164A  PRO*     1.3    76.4    -      -       -      +
    166A  GLY*     1.3    63.4    +      -       -      +
    168A  SER*     3.1     0.3    +      -       -      -
    169A  LYS*     3.0    50.0    +      -       +      +
   1200A  NAD      3.2    34.6    +      -       -      -
   1201A  CDP      5.7     3.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 166 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    127A  LYS*     4.2    22.0    -      -       -      -
    128A  VAL*     4.5     2.8    -      -       -      +
    161A  PHE*     3.6    11.3    -      -       -      +
    162A  HIS      3.2    17.0    -      -       -      -
    163A  SER*     2.8    11.7    +      -       -      -
    165A  TYR*     1.3    78.9    -      -       -      +
    167A  CYS*     1.3    56.8    +      -       -      +
    169A  LYS*     4.3     2.4    -      -       -      +
    170A  GLY*     2.9    27.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with CYS 167 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    161A  PHE*     3.7    24.9    -      -       +      -
    163A  SER      2.7    14.9    +      -       -      +
    164A  PRO      3.6     2.9    -      -       -      +
    166A  GLY*     1.3    75.0    -      -       -      +
    168A  SER*     1.3    57.2    -      -       -      +
    170A  GLY      4.0     0.2    -      -       -      -
    171A  ALA*     3.0    29.1    +      -       -      +
    171C  ALA*     5.5     0.3    -      -       -      +
    174C  GLN*     3.6    20.2    -      -       +      -
    175C  TYR*     3.5    35.4    -      -       +      +
    178C  ASP*     3.5    33.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 168 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96A  ASP*     2.6    33.3    +      -       -      -
    100A  ASN*     3.0    31.1    +      -       -      +
    101A  VAL*     3.4    18.9    -      -       -      +
    164A  PRO      2.8     9.7    +      -       -      -
    165A  TYR      3.1     5.7    +      -       -      -
    167A  CYS*     1.3    71.6    -      -       -      +
    169A  LYS*     1.3    72.6    +      -       -      +
    171A  ALA      3.4     0.2    +      -       -      -
    172A  ALA*     3.1    22.3    +      -       -      +
    175C  TYR*     3.3    14.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 169 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     81A  ALA      5.3     0.6    +      -       -      -
     82A  GLY*     5.2     0.4    -      -       -      -
    100A  ASN*     3.6    26.3    +      -       -      +
    122A  TYR*     3.1    29.4    +      -       -      +
    123A  SER      2.8    28.6    +      -       -      -
    124A  SER*     4.1     8.7    +      -       -      +
    125A  THR*     3.6    17.3    -      -       +      -
    128A  VAL*     4.6     1.1    -      -       -      -
    165A  TYR*     3.0    44.3    +      -       +      +
    168A  SER*     1.3    77.8    +      -       -      +
    170A  GLY*     1.4    53.1    +      -       -      +
    172A  ALA*     3.3     2.8    +      -       -      +
    173A  ASP*     2.8    35.7    +      -       -      +
   1200A  NAD      2.9    31.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 170 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128A  VAL*     3.7    16.3    -      -       -      +
    161A  PHE*     3.5    22.9    -      -       -      -
    166A  GLY      2.9    20.8    +      -       -      -
    169A  LYS*     1.4    75.1    -      -       -      +
    171A  ALA*     1.4    63.7    +      -       -      +
    173A  ASP*     3.2     3.1    +      -       -      +
    174A  GLN*     2.9    28.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 171 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101A  VAL*     4.1    19.3    -      -       +      -
    161A  PHE*     3.7     6.7    -      -       +      -
    167A  CYS      3.0    19.1    +      -       -      +
    168A  SER      3.8     4.3    -      -       -      +
    170A  GLY*     1.4    75.6    -      -       -      +
    172A  ALA*     1.3    63.0    +      -       -      +
    174A  GLN*     3.3     5.0    +      -       -      +
    175A  TYR*     3.0    31.4    +      -       +      -
    101C  VAL*     5.8     0.2    -      -       +      -
    161C  PHE*     5.4     1.8    -      -       -      -
    167C  CYS      5.7     0.4    -      -       -      -
    171C  ALA*     3.6    30.3    -      -       +      -
    175C  TYR*     5.2     1.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 172 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100A  ASN      3.6    16.6    -      -       -      +
    101A  VAL*     4.7     3.9    -      -       -      +
    104A  THR*     3.7    13.7    -      -       -      +
    105A  LEU*     5.2     1.6    -      -       -      -
    122A  TYR*     3.3    32.1    -      -       +      +
    168A  SER      3.1    16.3    +      -       -      +
    169A  LYS      3.5     0.7    -      -       -      +
    171A  ALA*     1.3    76.5    -      -       -      +
    173A  ASP*     1.3    57.6    +      -       -      +
    175A  TYR*     3.3     6.3    +      -       -      +
    176A  MET*     2.8    34.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 173 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122A  TYR*     3.8    11.6    -      -       -      -
    124A  SER*     2.8    26.8    +      -       -      +
    128A  VAL*     4.0     6.2    -      -       -      +
    159A  LEU*     6.2     0.2    -      -       -      -
    161A  PHE*     6.1     0.9    -      -       -      -
    169A  LYS      2.8    18.0    +      -       -      +
    170A  GLY*     3.2     8.7    -      -       -      +
    172A  ALA*     1.3    78.1    -      -       -      +
    174A  GLN*     1.3    71.4    +      -       -      +
    176A  MET*     3.3     4.2    +      -       -      +
    177A  LEU*     3.2    27.2    +      -       -      +
    189A  VAL*     3.5     8.3    -      -       -      +
    191A  ARG*     2.8    45.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 174 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    159A  LEU*     3.8    16.2    -      -       -      +
    161A  PHE*     4.1     7.2    -      -       +      -
    170A  GLY      2.9    19.1    +      -       -      +
    171A  ALA*     3.9     3.1    -      -       -      +
    173A  ASP*     1.3    99.5    +      -       -      +
    175A  TYR*     1.4    57.5    +      -       -      +
    177A  LEU*     3.3    14.1    +      -       -      +
    178A  ASP*     2.9    30.1    +      -       -      +
    191A  ARG*     3.5    13.7    -      -       -      +
    160C  ASP*     3.5    13.0    +      -       -      +
    161C  PHE*     2.9    67.1    +      -       +      +
    167C  CYS*     3.7     4.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 175 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101A  VAL*     4.9     2.5    -      -       +      -
    105A  LEU*     3.7    32.5    -      -       +      -
    108A  LEU*     4.0    13.2    -      -       +      -
    171A  ALA      3.0    26.6    +      -       -      +
    172A  ALA*     3.7     5.2    -      -       -      +
    174A  GLN*     1.4    71.3    -      -       -      +
    176A  MET*     1.3    67.8    +      -       -      +
    178A  ASP*     5.6     0.2    -      -       +      -
    179A  TYR*     2.9    47.8    +      +       -      -
     93C  PRO*     4.9     2.1    +      -       +      -
     96C  ASP*     4.1     1.4    +      -       -      -
     97C  PHE*     3.5    37.7    -      +       +      +
    101C  VAL*     4.7     1.8    -      -       +      -
    164C  PRO*     3.7    15.0    +      -       +      +
    167C  CYS*     3.6    39.0    -      -       +      -
    168C  SER*     3.1    29.0    +      -       -      -
    171C  ALA*     5.2     2.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 176 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79A  HIS*     3.9    11.2    -      -       +      -
    104A  THR*     3.4    27.1    -      -       +      -
    107A  LEU*     4.7     3.8    -      -       +      -
    108A  LEU*     3.9    24.4    -      -       +      +
    120A  ILE*     3.9    26.5    -      -       +      -
    122A  TYR*     3.8    34.3    -      -       +      -
    172A  ALA      2.8    19.8    +      -       -      +
    173A  ASP      3.5     7.9    -      -       -      +
    174A  GLN      3.3     0.2    -      -       -      -
    175A  TYR*     1.3    79.1    -      -       -      +
    177A  LEU*     1.3    57.9    +      -       -      +
    179A  TYR*     3.6     1.0    +      -       -      +
    180A  ALA      3.5     8.7    +      -       -      -
    187A  THR*     2.8    39.2    +      -       -      +
    188A  VAL      5.3     0.2    -      -       -      +
    189A  VAL*     3.6    13.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 177 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173A  ASP*     3.2    27.7    +      -       -      +
    174A  GLN*     3.7    19.7    -      -       -      +
    175A  TYR      3.2     0.2    -      -       -      -
    176A  MET*     1.3    73.4    -      -       -      +
    178A  ASP*     1.3    64.2    +      -       -      +
    180A  ALA*     3.2    13.9    +      -       -      +
    181A  ARG*     3.3    36.1    +      -       -      +
    187A  THR*     4.4     2.9    -      -       -      +
    188A  VAL      5.4     0.2    -      -       -      -
    189A  VAL*     3.8    14.6    -      -       +      +
    191A  ARG*     3.8     9.9    -      -       -      +
    261A  GLY*     3.4    27.3    -      -       -      +
    262A  ASN      3.6    22.7    -      -       -      +
    263A  ALA*     3.8     8.7    -      -       +      +
    160C  ASP*     6.1     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 178 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    174A  GLN      2.9    17.3    +      -       -      +
    175A  TYR*     4.0     2.2    -      -       -      +
    177A  LEU*     1.3    75.2    -      -       -      +
    179A  TYR*     1.4    62.2    +      -       +      +
    181A  ARG*     3.0    26.9    +      -       -      +
    182A  ILE*     2.7    50.5    +      -       -      +
    162C  HIS*     3.3     1.5    -      -       -      -
    163C  SER*     2.6    51.0    +      -       -      -
    164C  PRO*     3.2     7.6    -      -       -      +
    167C  CYS*     3.5    14.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 179 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105A  LEU*     4.2     7.9    -      -       +      +
    108A  LEU*     3.7    44.4    -      -       +      -
    109A  GLU*     2.6    34.1    +      -       -      +
    112A  ARG*     4.0     5.4    -      -       +      -
    175A  TYR*     2.9    47.6    +      +       -      +
    176A  MET      4.1     4.5    -      -       -      +
    177A  LEU      3.3     0.4    -      -       -      -
    178A  ASP*     1.4    80.3    -      -       +      +
    180A  ALA*     1.3    61.2    +      -       -      +
    183A  PHE*     3.1    48.4    +      +       -      +
    184A  GLY      3.2     0.2    +      -       -      -
    185A  LEU*     3.1    36.8    +      -       +      -
    187A  THR*     5.0     0.2    -      -       +      -
     93C  PRO*     3.4    18.1    -      -       +      +
    164C  PRO*     5.0     3.4    -      -       +      -
----------------------------------------------------------
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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
----------------------------------------------------------
    176A  MET      3.5     3.6    +      -       -      -
    177A  LEU      3.2     9.7    +      -       -      +
    178A  ASP      3.1     0.8    -      -       -      -
    179A  TYR*     1.3    78.2    -      -       -      +
    181A  ARG*     1.3    59.8    +      -       -      +
    184A  GLY*     3.1    16.6    +      -       -      -
    185A  LEU*     3.3    23.8    -      -       -      +
    187A  THR*     3.5    18.3    +      -       -      +
    260A  ARG*     3.0    23.8    +      -       -      +
    261A  GLY*     3.6    21.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 181 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    177A  LEU*     3.3    35.8    +      -       -      +
    178A  ASP*     3.0    39.4    +      -       -      +
    180A  ALA*     1.3    80.9    -      -       -      +
    182A  ILE*     1.3    70.0    +      -       +      +
    184A  GLY*     4.5     1.2    +      -       -      -
    261A  GLY      4.8     6.1    +      -       -      -
    160C  ASP*     3.8    13.3    +      -       -      -
    161C  PHE      3.2    19.0    +      -       -      -
    162C  HIS*     3.5    36.0    +      -       -      -
    300C  GLU*     5.5     1.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 182 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    178A  ASP*     2.7    44.1    +      -       -      +
    181A  ARG*     1.3    82.7    -      -       +      +
    183A  PHE*     1.3    90.2    +      -       +      +
    184A  GLY      3.5     0.4    +      -       -      -
     90C  ILE*     4.1    13.0    -      -       +      -
    162C  HIS*     6.0     0.4    -      -       +      -
    163C  SER*     3.8    20.9    -      -       -      +
    164C  PRO*     4.2     1.8    -      -       +      -
    300C  GLU*     2.8    60.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 183 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112A  ARG*     3.4    40.8    -      -       +      +
    116A  SER*     5.6     1.7    -      -       -      -
    179A  TYR*     3.1    49.5    +      +       -      +
    182A  ILE*     1.3   100.7    -      -       +      +
    184A  GLY*     1.3    62.9    +      -       -      +
    185A  LEU*     3.3    13.6    +      -       +      +
     90C  ILE*     3.5    31.4    -      -       +      -
     93C  PRO*     4.0    13.9    -      -       +      -
    164C  PRO*     4.1    13.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 184 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116A  SER      4.9     2.4    -      -       -      +
    180A  ALA      3.1    16.7    +      -       -      -
    181A  ARG      4.4     1.0    +      -       -      -
    182A  ILE      3.5     2.6    +      -       -      -
    183A  PHE*     1.3    75.3    -      -       -      +
    185A  LEU*     1.3    68.1    +      -       -      +
    186A  ASN*     3.7     6.4    +      -       -      +
    260A  ARG*     3.7    10.0    +      -       -      -
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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