Contacts of the helix formed by residues 162 - 184 (chain D) 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 D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    178B  ASP*     3.4     2.7    -      -       -      +
    181B  ARG*     3.5    27.0    -      -       -      -
    182B  ILE*     6.1     0.2    -      -       +      -
    127D  LYS*     3.9    12.9    +      -       -      +
    130D  GLY*     3.7    11.2    -      -       -      -
    131D  ASP*     3.8    25.4    +      -       -      -
    160D  ASP*     2.7    52.1    +      -       -      -
    161D  PHE*     1.3    72.5    -      -       -      +
    163D  SER*     1.3    79.0    +      -       -      +
    166D  GLY*     3.4     8.3    -      -       -      -
    301D  SER*     2.4    44.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 163 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    178B  ASP*     2.7    21.4    +      -       -      +
    182B  ILE*     4.1    13.0    -      -       -      +
     86D  MET*     3.3    38.5    -      -       -      +
     89D  SER*     4.4     0.2    -      -       -      -
    127D  LYS*     5.0     0.7    -      -       -      +
    162D  HIS*     1.3    82.4    +      -       -      +
    164D  PRO*     1.3    73.3    -      -       -      +
    165D  TYR*     3.5     2.1    +      -       -      -
    166D  GLY      2.9    13.2    +      -       -      -
    167D  CYS*     2.8    27.7    +      -       -      -
    300D  GLU*     5.4     3.8    -      -       -      -
    301D  SER*     5.3     1.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with PRO 164 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    175B  TYR*     3.9    12.0    +      -       +      -
    178B  ASP*     3.1    10.1    -      -       -      +
    179B  TYR*     5.2     2.2    -      -       +      -
    182B  ILE*     4.3     4.5    -      -       +      -
    183B  PHE*     4.2    22.4    -      -       +      -
     89D  SER*     3.5    35.4    -      -       -      +
     90D  ILE*     3.8    13.5    -      -       +      -
     93D  PRO*     4.1    12.6    -      -       +      +
     96D  ASP*     2.9    11.8    -      -       -      +
    163D  SER*     1.3    90.4    -      -       -      +
    165D  TYR*     1.3    55.6    +      -       -      +
    167D  CYS*     3.1     7.9    +      -       +      +
    168D  SER*     2.8    27.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 165 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83D  GLN*     3.1    30.7    -      -       -      -
     84D  VAL*     3.5    24.2    +      -       -      -
     85D  ALA      4.2     0.2    -      -       -      -
     86D  MET*     3.8    13.7    -      -       +      -
     89D  SER*     3.0    23.6    +      -       -      +
     96D  ASP*     3.4    14.1    -      -       -      -
    125D  THR*     3.7    28.2    +      -       +      -
    127D  LYS*     3.7    36.5    +      -       +      -
    163D  SER*     3.7     4.5    -      -       -      +
    164D  PRO*     1.3    76.2    -      -       -      +
    166D  GLY*     1.3    64.8    +      -       -      +
    168D  SER*     3.2     1.0    +      -       -      -
    169D  LYS*     2.9    48.7    +      -       +      +
   1500D  NAD      3.4    22.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 166 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125D  THR*     5.1     0.7    -      -       -      -
    127D  LYS*     4.4    16.4    -      -       -      -
    128D  VAL*     4.5     2.3    -      -       -      +
    161D  PHE*     3.5    12.9    -      -       -      +
    162D  HIS      3.4    16.6    -      -       -      -
    163D  SER*     2.9    11.3    +      -       -      -
    165D  TYR*     1.3    83.3    -      -       -      +
    167D  CYS*     1.3    56.3    +      -       -      +
    169D  LYS*     4.3     2.4    -      -       -      +
    170D  GLY*     2.8    27.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with CYS 167 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    171B  ALA*     5.5     0.7    -      -       -      +
    174B  GLN*     3.7    19.1    -      -       +      -
    175B  TYR*     3.6    30.4    -      -       +      -
    178B  ASP*     3.5    29.4    -      -       -      -
    161D  PHE*     3.7    24.1    -      -       +      -
    163D  SER      2.8    15.7    +      -       -      +
    164D  PRO      3.5     7.2    -      -       -      +
    166D  GLY*     1.3    77.7    -      -       -      +
    168D  SER*     1.3    58.4    +      -       -      +
    171D  ALA*     2.9    29.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 168 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    175B  TYR*     3.2    14.6    +      -       -      -
     96D  ASP*     2.5    34.5    +      -       -      -
     97D  PHE*     4.1     0.2    -      -       -      -
    100D  ASN*     3.1    24.3    +      -       -      +
    101D  VAL*     3.4    27.0    -      -       -      +
    164D  PRO      2.8    10.4    +      -       -      -
    165D  TYR      3.2     2.6    +      -       -      -
    167D  CYS*     1.3    70.5    -      -       -      +
    169D  LYS*     1.3    67.4    +      -       -      +
    171D  ALA      3.4     0.5    +      -       -      -
    172D  ALA*     3.1    22.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 169 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     82D  GLY*     5.2     0.8    -      -       -      -
    100D  ASN*     3.7    24.7    +      -       -      +
    122D  TYR*     3.4    24.9    +      -       -      +
    123D  SER      2.7    29.4    +      -       -      -
    124D  SER*     4.0    12.1    -      -       -      +
    125D  THR*     3.6    17.3    -      -       +      -
    128D  VAL*     4.6     1.1    -      -       -      -
    165D  TYR*     2.9    47.5    +      -       +      +
    166D  GLY      4.3     0.2    -      -       -      +
    168D  SER*     1.3    77.8    +      -       -      +
    170D  GLY*     1.3    58.1    +      -       -      +
    172D  ALA*     3.3     3.1    +      -       -      +
    173D  ASP*     2.9    30.5    +      -       -      +
   1500D  NAD      2.8    34.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 170 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128D  VAL*     3.8    15.4    -      -       -      +
    161D  PHE*     3.5    22.4    -      -       -      -
    166D  GLY      2.8    21.3    +      -       -      -
    169D  LYS*     1.3    77.6    -      -       -      +
    171D  ALA*     1.3    60.9    +      -       -      +
    173D  ASP*     3.3     3.2    +      -       -      +
    174D  GLN*     3.0    28.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 171 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    161B  PHE*     5.3     2.2    -      -       -      -
    167B  CYS      5.8     0.2    -      -       -      -
    171B  ALA*     3.6    29.6    -      -       +      -
    175B  TYR*     5.3     1.6    -      -       +      -
    101D  VAL*     4.1    20.2    -      -       +      -
    161D  PHE*     3.8     5.9    -      -       -      -
    167D  CYS      2.9    18.7    +      -       -      +
    168D  SER      3.8     3.6    -      -       -      +
    169D  LYS      3.4     0.2    -      -       -      -
    170D  GLY*     1.3    77.3    -      -       -      +
    172D  ALA*     1.3    63.4    +      -       -      +
    174D  GLN*     3.4     4.4    +      -       -      +
    175D  TYR*     2.9    32.6    +      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 172 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100D  ASN      3.6    17.3    -      -       -      +
    101D  VAL*     4.7     4.4    -      -       -      +
    104D  THR*     3.8    14.4    -      -       -      +
    105D  LEU*     5.5     0.7    -      -       -      -
    122D  TYR*     3.4    29.8    -      -       +      +
    168D  SER      3.1    17.0    +      -       -      +
    169D  LYS      3.5     0.7    -      -       -      +
    171D  ALA*     1.3    76.2    -      -       -      +
    173D  ASP*     1.3    56.0    +      -       -      +
    175D  TYR*     3.3     7.1    +      -       -      +
    176D  MET*     2.9    32.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 173 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122D  TYR*     3.9    10.7    -      -       -      -
    124D  SER*     2.8    25.3    +      -       -      +
    128D  VAL*     4.2     6.6    -      -       -      +
    159D  LEU*     6.2     0.4    -      -       -      -
    161D  PHE*     6.1     0.7    -      -       -      -
    169D  LYS      2.9    16.5    +      -       -      +
    170D  GLY*     3.4     7.2    -      -       -      +
    172D  ALA*     1.3    75.4    -      -       -      +
    174D  GLN*     1.3    69.6    +      -       -      +
    176D  MET*     3.3     5.2    +      -       -      +
    177D  LEU*     3.2    26.5    +      -       -      +
    189D  VAL*     3.5    12.2    -      -       -      +
    191D  ARG*     2.7    45.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 174 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    160B  ASP*     3.6    13.7    -      -       -      +
    161B  PHE*     3.0    65.9    +      -       +      +
    167B  CYS*     3.7     3.5    -      -       +      -
    159D  LEU*     3.7    15.9    -      -       -      +
    161D  PHE*     4.1     6.7    -      -       +      -
    170D  GLY      3.0    20.4    +      -       -      +
    171D  ALA      3.9     3.6    -      -       -      +
    173D  ASP*     1.3    99.0    +      -       -      +
    175D  TYR*     1.3    57.1    +      -       -      +
    177D  LEU*     3.4    13.1    +      -       -      +
    178D  ASP*     2.9    31.0    +      -       -      +
    181D  ARG*     5.8     0.2    +      -       -      -
    191D  ARG*     3.4    14.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 175 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93B  PRO*     4.9     2.6    +      -       +      -
     96B  ASP*     4.3     1.0    +      -       -      -
     97B  PHE*     3.6    36.8    -      +       +      +
    101B  VAL*     4.8     2.2    -      -       +      -
    164B  PRO*     3.8    14.8    +      -       +      +
    167B  CYS*     3.6    39.0    -      -       +      -
    168B  SER*     3.2    27.9    +      -       -      -
    101D  VAL*     5.0     2.5    -      -       +      -
    105D  LEU*     3.6    25.1    -      -       +      -
    108D  LEU*     4.0    13.2    -      -       +      -
    171D  ALA*     2.9    31.1    +      -       +      +
    172D  ALA*     3.7     4.9    -      -       -      +
    174D  GLN*     1.3    77.8    -      -       -      +
    176D  MET*     1.3    58.1    +      -       -      +
    178D  ASP*     4.6     0.4    -      -       +      -
    179D  TYR*     2.9    61.6    +      +       -      -
----------------------------------------------------------
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Residues in contact with MET 176 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79D  HIS*     4.1    10.3    -      -       +      -
    104D  THR*     3.5    26.7    -      -       +      -
    107D  LEU*     4.6     4.7    -      -       +      -
    108D  LEU*     3.9    27.1    -      -       +      +
    120D  ILE*     4.0    21.1    -      -       +      -
    122D  TYR*     3.7    34.3    -      -       +      -
    172D  ALA      2.9    18.3    +      -       -      +
    173D  ASP      3.3     8.0    +      -       -      +
    175D  TYR*     1.3    77.9    -      -       -      +
    177D  LEU*     1.3    59.3    +      -       -      +
    179D  TYR*     3.5     1.0    +      -       -      +
    180D  ALA      3.4     8.3    +      -       -      -
    187D  THR*     2.8    42.3    +      -       -      +
    188D  VAL      5.3     0.2    -      -       -      +
    189D  VAL*     3.5    13.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 177 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    160B  ASP*     6.1     0.9    -      -       -      +
    173D  ASP*     3.2    27.2    +      -       -      +
    174D  GLN*     3.7    16.4    -      -       -      +
    175D  TYR      3.3     0.2    -      -       -      -
    176D  MET*     1.3    77.7    -      -       -      +
    178D  ASP*     1.3    60.1    +      -       -      +
    180D  ALA*     3.3    13.9    +      -       -      +
    181D  ARG*     3.3    34.3    +      -       -      +
    187D  THR*     4.4     3.8    -      -       -      +
    188D  VAL      5.5     0.2    -      -       -      -
    189D  VAL*     3.8    14.4    -      -       +      +
    191D  ARG*     3.9    13.7    -      -       -      +
    261D  GLY*     3.6    26.4    -      -       -      +
    262D  ASN      3.6    21.8    -      -       -      +
    263D  ALA*     3.9     9.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 178 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    161B  PHE      4.0     1.3    -      -       -      -
    162B  HIS*     3.2     1.9    -      -       -      +
    163B  SER*     2.8    50.3    +      -       -      -
    164B  PRO*     3.4     5.4    -      -       -      +
    167B  CYS*     3.5    12.3    -      -       -      -
    174D  GLN      2.9    18.0    +      -       -      +
    175D  TYR*     4.0     2.0    -      -       +      +
    177D  LEU*     1.3    73.6    -      -       -      +
    179D  TYR*     1.3    59.1    +      -       +      +
    180D  ALA      3.0     1.8    -      -       -      -
    181D  ARG*     2.9    30.8    +      -       -      +
    182D  ILE*     2.7    51.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 179 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93B  PRO*     3.4    16.7    -      -       +      +
    164B  PRO*     5.3     3.4    -      -       +      -
    105D  LEU*     3.7    12.1    -      -       +      +
    108D  LEU*     3.8    33.7    -      -       +      -
    109D  GLU*     2.7    31.0    +      -       -      -
    112D  ARG*     3.8    13.0    -      -       -      -
    175D  TYR*     2.9    47.4    +      +       -      +
    176D  MET      3.9     5.2    -      -       -      +
    177D  LEU      3.4     0.2    -      -       -      -
    178D  ASP*     1.3    79.5    -      -       +      +
    180D  ALA*     1.3    58.5    +      -       -      +
    183D  PHE*     2.9    50.7    +      +       -      +
    185D  LEU*     3.2    41.3    +      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 180 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    176D  MET      3.4     3.0    +      -       -      -
    177D  LEU      3.3    12.0    +      -       -      +
    178D  ASP      3.0     0.4    -      -       -      -
    179D  TYR*     1.3    80.2    -      -       -      +
    181D  ARG*     1.3    58.7    +      -       +      +
    184D  GLY*     3.0    20.3    +      -       -      -
    185D  LEU*     3.3    24.4    -      -       -      +
    187D  THR*     3.4    17.3    -      -       -      +
    260D  ARG*     3.0    17.8    +      -       -      +
    261D  GLY*     3.6    22.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 181 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    160B  ASP*     3.9     6.7    +      -       -      -
    161B  PHE      3.1    19.6    +      -       -      -
    162B  HIS*     3.2    36.8    +      -       -      +
    174D  GLN*     5.8     0.2    +      -       -      -
    177D  LEU*     3.3    27.4    +      -       -      +
    178D  ASP*     2.9    40.5    +      -       -      +
    180D  ALA*     1.3    82.8    -      -       +      +
    182D  ILE*     1.3    65.5    +      -       +      +
    184D  GLY*     4.4     1.7    +      -       -      -
    261D  GLY*     5.3     7.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 182 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90B  ILE*     4.1    26.4    -      -       +      +
    162B  HIS*     6.0     0.4    -      -       +      -
    163B  SER*     4.1    19.3    -      -       -      +
    164B  PRO*     4.4     1.8    -      -       +      -
    300B  GLU      6.0     0.7    -      -       -      -
    301B  SER*     4.4    17.9    -      -       -      +
    178D  ASP*     2.7    46.2    +      -       -      +
    181D  ARG*     1.3    79.0    -      -       +      +
    183D  PHE*     1.3    93.7    +      -       +      +
    184D  GLY      3.5     0.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 183 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90B  ILE*     3.4    32.8    -      -       +      -
     93B  PRO*     3.8    16.2    -      -       +      -
    164B  PRO*     4.2     8.5    -      -       +      -
    112D  ARG*     3.5    43.5    -      -       +      -
    116D  SER*     5.6     2.1    -      -       -      -
    179D  TYR*     2.9    45.0    +      +       -      +
    182D  ILE*     1.3   104.5    -      -       +      +
    184D  GLY*     1.3    63.7    +      -       -      +
    185D  LEU*     3.2    13.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 184 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116D  SER      4.8     3.3    -      -       -      +
    180D  ALA      3.0    15.7    +      -       -      -
    181D  ARG      4.4     1.4    +      -       -      -
    182D  ILE      3.5     2.2    -      -       -      -
    183D  PHE*     1.3    77.4    -      -       -      +
    185D  LEU*     1.3    67.6    +      -       -      +
    186D  ASN*     3.7     8.1    +      -       -      +
    260D  ARG*     3.5    10.7    +      -       -      -
----------------------------------------------------------
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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