Contacts of the helix formed by residues 135 - 157 (chain A) in PDB entry 1OHV


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 CYS 135 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133A  MET      3.4     0.8    +      -       -      -
    134A  ALA*     1.3    80.3    -      -       -      +
    136A  GLY*     1.3    59.3    +      -       -      +
    137A  SER*     3.4    18.8    -      -       -      -
    138A  CYS*     3.5     7.1    -      -       -      -
    139A  SER*     2.7    33.5    +      -       -      -
    328A  SER*     3.4    12.6    -      -       -      -
    334A  GLY*     4.5     0.7    -      -       -      -
    600A  PLP      3.6    16.6    -      -       -      +
    800A  FES      2.3    43.5    -      -       -      -
    134B  ALA*     5.6     1.1    -      -       +      -
    138B  CYS*     5.4     1.3    -      -       -      -
    352B  ASN*     6.2     3.6    -      -       -      -
    354B  TRP*     4.2     8.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 136 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135A  CYS*     1.3    75.3    -      -       -      +
    137A  SER*     1.3    61.0    +      -       -      +
    139A  SER*     3.2     5.6    +      -       -      -
    140A  ASN*     3.0    26.5    +      -       -      -
    300A  VAL*     3.9    12.6    -      -       -      +
    328A  SER*     3.2    19.3    +      -       -      -
    600A  PLP      3.1    27.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 137 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135A  CYS*     3.3     7.1    -      -       -      -
    136A  GLY*     1.3    76.4    -      -       -      +
    138A  CYS*     1.3    57.8    +      -       -      +
    140A  ASN      3.2     1.6    +      -       -      -
    141A  GLU*     2.8    33.7    +      -       -      +
    190A  HIS      4.5     1.6    -      -       -      -
    191A  GLY*     3.4    20.4    -      -       -      -
    192A  ARG      3.6     5.4    +      -       -      -
    193A  THR*     3.8    27.5    +      -       -      +
    196A  CYS*     3.2    10.9    -      -       -      -
    600A  PLP      2.8    25.1    +      -       -      -
    800A  FES      4.7     1.1    -      -       -      -
    352B  ASN*     5.2     4.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with CYS 138 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133A  MET*     3.8    11.5    -      -       -      +
    134A  ALA*     3.7    13.0    -      -       -      -
    135A  CYS*     3.5    22.5    -      -       -      -
    137A  SER*     1.3    77.3    -      -       -      +
    139A  SER*     1.3    56.9    +      -       -      +
    141A  GLU*     4.2     8.1    -      -       -      -
    142A  ASN*     2.8    45.3    +      -       -      +
    352A  ASN*     4.9     6.3    -      -       -      +
    800A  FES      2.2    45.4    -      -       -      -
    135B  CYS*     5.4     1.3    -      -       -      -
    193B  THR*     4.5     5.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 139 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133A  MET*     3.4    10.4    -      -       -      +
    135A  CYS      2.7    19.6    +      -       -      -
    136A  GLY*     3.2    10.7    +      -       -      -
    137A  SER      3.1     0.6    -      -       -      -
    138A  CYS*     1.3    79.8    -      -       -      +
    140A  ASN*     1.3    58.5    +      -       -      +
    143A  ALA*     2.9    28.8    +      -       -      +
    326A  THR*     3.7    13.6    -      -       -      +
    327A  PHE      3.5     5.1    +      -       -      -
    335A  GLY      2.8    41.0    +      -       -      -
    336A  PHE*     3.7     6.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 140 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136A  GLY      3.0    11.5    +      -       -      +
    139A  SER*     1.3    73.6    -      -       -      +
    141A  GLU*     1.3    66.3    +      -       -      +
    143A  ALA*     3.3     3.7    +      -       -      +
    144A  PHE*     2.9    40.2    +      -       +      -
    190A  HIS*     2.8    27.7    +      -       -      +
    196A  CYS*     3.6    16.8    -      -       -      -
    263A  ILE*     4.0    12.8    -      -       +      +
    296A  LEU*     4.4     1.0    -      -       -      +
    298A  ASP*     2.8    25.7    +      -       -      +
    300A  VAL*     5.2     0.2    -      -       -      -
    326A  THR*     2.6    30.2    +      -       -      +
    600A  PLP      3.7     5.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 141 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137A  SER      2.8    21.2    +      -       -      +
    138A  CYS      4.0     2.7    -      -       -      +
    140A  ASN*     1.3    77.2    -      -       -      +
    142A  ASN*     1.3    58.7    +      -       -      +
    144A  PHE*     3.2    10.6    +      -       -      +
    145A  LYS*     3.1    30.4    +      -       -      +
    193A  THR*     2.4    28.6    +      -       -      +
    194A  MET      3.7     0.3    +      -       -      -
    195A  GLY*     2.8    23.7    +      -       -      -
    196A  CYS*     3.0    13.7    +      -       -      -
    141B  GLU*     4.6     0.4    -      -       -      +
    193B  THR*     3.9    32.5    -      -       +      -
    194B  MET*     3.0    35.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 142 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133A  MET*     3.4    33.3    -      -       +      +
    138A  CYS*     2.8    35.3    +      -       -      +
    141A  GLU*     1.3    79.1    -      -       -      +
    143A  ALA*     1.3    56.9    +      -       -      +
    145A  LYS*     3.4    27.8    +      -       -      +
    146A  THR*     2.7    37.7    +      -       -      -
    336A  PHE*     3.7    10.3    -      -       +      -
    350A  ILE*     3.6    19.3    -      -       +      +
    351A  PHE      4.3     5.6    +      -       -      +
    352A  ASN*     4.4     4.9    -      -       -      +
    192B  ARG*     5.5     0.9    -      -       -      +
    193B  THR*     4.9     6.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 143 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    139A  SER      2.9    18.4    +      -       -      +
    140A  ASN      3.5     5.4    -      -       -      +
    142A  ASN*     1.3    75.1    -      -       -      +
    144A  PHE*     1.3    64.9    +      -       -      +
    146A  THR*     3.3     3.4    +      -       -      -
    147A  ILE*     3.0    30.5    +      -       -      +
    296A  LEU*     3.9    15.3    -      -       +      -
    324A  VAL*     4.0    14.1    -      -       +      +
    326A  THR*     3.8    19.1    -      -       +      -
    336A  PHE*     3.9    10.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 144 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140A  ASN*     2.9    25.9    +      -       +      -
    141A  GLU*     3.2    11.0    +      -       -      +
    143A  ALA*     1.3    77.0    -      -       -      +
    145A  LYS*     1.3    56.5    +      -       -      +
    147A  ILE*     3.2     7.6    +      -       -      +
    148A  PHE*     2.8    48.7    +      -       +      -
    182A  ILE*     3.9    26.5    -      -       +      -
    195A  GLY      3.8    20.4    -      -       -      -
    196A  CYS*     3.8    10.8    -      -       -      -
    199A  THR*     3.5    29.4    -      -       +      -
    215A  TRP*     4.6     0.7    -      +       -      -
    263A  ILE*     3.8    13.9    -      -       +      -
    296A  LEU*     3.5    26.7    -      -       +      -
    194B  MET*     3.4    24.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 145 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141A  GLU      3.1    12.4    +      -       -      +
    142A  ASN*     3.4    26.6    +      -       -      +
    143A  ALA      3.3     0.2    -      -       -      -
    144A  PHE*     1.3    72.3    -      -       -      +
    146A  THR*     1.3    61.8    +      -       -      +
    148A  PHE*     3.1     4.3    +      -       -      +
    149A  MET*     2.9    36.4    +      -       -      +
    349A  ARG      3.4    21.3    +      -       -      -
    350A  ILE*     3.7     8.9    -      -       +      +
    192B  ARG*     2.8    48.0    +      -       -      +
    193B  THR*     5.3     0.7    -      -       -      +
    194B  MET*     4.4    10.8    -      -       +      -
    197B  LEU*     4.3     6.2    -      -       +      +
    206B  HIS      4.8     4.0    +      -       -      -
    210B  ILE*     3.6    43.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 146 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131A  ILE*     5.2     0.2    -      -       -      +
    142A  ASN      2.7    24.9    +      -       -      -
    143A  ALA*     3.5     6.1    -      -       -      -
    145A  LYS*     1.3    76.1    -      -       -      +
    147A  ILE*     1.3    57.8    +      -       -      +
    149A  MET*     3.5     8.6    +      -       +      +
    150A  TRP*     3.0    26.9    +      -       -      +
    324A  VAL*     5.3     3.8    -      -       +      -
    336A  PHE*     3.2    28.3    -      -       +      -
    338A  HIS*     4.6     4.9    -      -       +      +
    342A  PHE*     3.2    41.2    -      -       +      +
    344A  PRO*     5.0     4.4    -      -       +      +
    350A  ILE*     3.5    15.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 147 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    143A  ALA      3.0    20.5    +      -       -      +
    144A  PHE*     3.4     6.3    -      -       -      +
    146A  THR*     1.3    74.8    -      -       -      +
    148A  PHE*     1.3    60.4    +      -       -      +
    150A  TRP*     3.2     8.5    +      -       +      +
    151A  TYR*     2.9    27.2    +      -       -      +
    182A  ILE*     4.2     8.3    -      -       +      -
    260A  ALA*     3.4    36.6    -      -       +      +
    261A  GLY*     3.9     7.4    -      -       -      +
    294A  ALA*     3.6    26.7    -      -       +      -
    296A  LEU*     3.9    35.7    -      -       +      -
    324A  VAL*     4.2    12.1    -      -       +      -
    342A  PHE*     4.2     7.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 148 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144A  PHE*     2.8    35.7    +      -       +      +
    145A  LYS*     3.1     8.0    +      -       -      +
    147A  ILE*     1.3    73.2    -      -       -      +
    149A  MET*     1.3    62.4    +      -       -      +
    151A  TYR*     3.4     4.9    +      -       -      +
    152A  ARG*     3.2    28.8    +      -       -      +
    180A  TYR*     3.8    37.0    -      -       +      -
    181A  SER      3.9     3.6    -      -       -      -
    182A  ILE*     3.5    33.2    -      -       +      -
    215A  TRP*     4.1    11.7    -      +       -      -
    260A  ALA*     3.9     7.4    -      -       +      -
    194B  MET*     3.8    22.4    -      -       -      -
    209B  ASP      3.4    18.4    -      -       -      +
    210B  ILE*     4.4     4.0    -      -       +      -
    211B  PRO*     3.3    31.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 149 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145A  LYS      2.9    21.3    +      -       -      +
    146A  THR*     3.6     6.7    -      -       +      +
    148A  PHE*     1.3    76.4    -      -       -      +
    150A  TRP*     1.3    58.5    +      -       -      +
    152A  ARG*     3.6     2.1    +      -       -      +
    153A  SER*     3.1    28.6    +      -       -      -
    342A  PHE      5.6     0.2    -      -       -      +
    344A  PRO*     3.5    43.5    -      -       +      -
    345A  ASN      4.8     0.2    -      -       -      +
    349A  ARG*     3.2    58.7    +      -       +      +
    350A  ILE*     3.9    17.0    -      -       +      -
    209B  ASP*     4.2    10.6    -      -       +      +
    210B  ILE*     4.2    13.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 150 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    146A  THR      3.0    17.3    +      -       -      +
    147A  ILE      3.2     8.5    +      -       -      +
    149A  MET*     1.3    76.5    -      -       -      +
    151A  TYR*     1.3    78.8    +      +       +      +
    153A  SER*     3.3     8.3    +      -       -      -
    154A  LYS*     3.1    63.0    +      -       +      +
    260A  ALA      3.7     6.5    -      -       -      -
    292A  GLY*     3.3    19.7    -      -       -      -
    293A  CYS      4.3     0.9    -      -       -      -
    294A  ALA*     3.6    22.9    -      -       +      -
    323A  ASP*     5.7     0.9    -      -       -      -
    341A  GLU*     3.0    53.6    +      -       +      +
    342A  PHE*     3.1    42.6    -      +       +      +
----------------------------------------------------------
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Residues in contact with TYR 151 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    147A  ILE      2.9    15.9    +      -       -      +
    148A  PHE      3.8     4.5    -      -       -      +
    149A  MET      3.3     0.2    -      -       -      -
    150A  TRP*     1.3    86.9    -      +       +      +
    152A  ARG*     1.3    60.0    +      -       -      +
    154A  LYS*     3.3    27.5    +      -       +      +
    155A  GLU*     3.3    42.3    +      -       +      +
    180A  TYR*     3.6    20.6    -      +       +      -
    258A  THR*     3.2    29.7    -      -       +      +
    259A  VAL      4.0    11.8    +      -       -      -
    260A  ALA*     3.7    23.3    -      -       +      -
    291A  HIS      4.6     6.6    +      -       -      -
    292A  GLY      3.3    24.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 152 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    148A  PHE      3.2    16.3    +      -       -      +
    149A  MET      4.1     0.7    -      -       -      +
    151A  TYR*     1.3    73.4    -      -       -      +
    153A  SER*     1.3    59.3    +      -       -      +
    155A  GLU*     3.2    27.2    +      -       -      +
    156A  ARG*     3.0    65.8    +      -       -      +
    165A  GLU*     3.2    21.4    +      -       -      -
    175A  PRO*     3.8    19.3    +      -       -      +
    178A  PRO*     3.4    19.9    -      -       +      +
    180A  TYR*     3.3    27.2    +      -       +      -
    209B  ASP*     3.7    34.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 153 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149A  MET      3.1    19.0    +      -       -      -
    150A  TRP*     3.6    10.5    +      -       -      -
    151A  TYR      3.3     0.2    -      -       -      -
    152A  ARG*     1.3    74.7    -      -       -      +
    154A  LYS*     1.3    60.7    +      -       -      +
    156A  ARG*     4.2    13.0    -      -       -      +
    157A  GLY*     3.0    31.9    +      -       -      +
    345A  ASN*     6.3     4.3    -      -       -      -
    349A  ARG*     6.4     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 154 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    150A  TRP*     3.1    60.2    +      -       +      +
    151A  TYR*     3.4    24.4    -      -       -      +
    152A  ARG      3.2     0.2    -      -       -      -
    153A  SER*     1.3    79.8    +      -       -      +
    155A  GLU*     1.3    65.2    +      -       +      +
    157A  GLY*     3.5     8.9    +      -       -      -
    292A  GLY*     2.8    36.1    +      -       -      -
    341A  GLU*     5.3     2.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 155 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151A  TYR*     3.3    32.7    +      -       +      +
    152A  ARG*     3.2    27.7    +      -       -      +
    154A  LYS*     1.3    83.7    -      -       +      +
    156A  ARG*     1.3    59.4    +      -       -      +
    157A  GLY*     4.8     0.2    -      -       -      -
    180A  TYR*     2.3    36.3    +      -       -      -
    258A  THR*     5.2     2.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 156 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    152A  ARG*     3.0    52.2    +      -       -      +
    153A  SER*     4.1    10.6    -      -       -      +
    155A  GLU*     1.3    75.9    -      -       -      +
    157A  GLY*     1.3    65.4    +      -       -      +
    158A  GLN      3.3     0.3    +      -       -      -
    159A  SER*     2.6    56.2    +      -       -      +
    160A  ALA      4.0    10.2    +      -       -      +
    161A  PHE*     3.3    23.9    -      -       -      +
    165A  GLU*     3.2    25.4    +      -       -      +
    349A  ARG*     5.6     0.2    -      -       -      +
    209B  ASP*     2.9    42.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 157 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    153A  SER*     3.0    22.1    +      -       -      +
    154A  LYS      3.5     6.7    +      -       -      -
    155A  GLU      3.4     3.2    -      -       -      -
    156A  ARG*     1.3    79.6    -      -       -      +
    158A  GLN*     1.3    60.4    +      -       -      -
    159A  SER      3.6     4.5    +      -       -      +
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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