Contacts of the helix formed by residues 163 - 186 (chain B) in PDB entry 4MZ7


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with ASN 163 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    154A  TYR*     3.1    34.1    +      -       -      +
    161A  SER*     3.9     6.3    +      -       -      +
    144B  LEU      3.5    12.3    -      -       -      +
    145B  ARG      3.1    16.4    +      -       -      +
    146B  TYR      4.6     0.9    -      -       -      -
    147B  ILE      3.3     9.1    +      -       -      +
    148B  LYS*     3.5    29.3    +      -       -      +
    149B  GLN*     3.8     5.5    -      -       -      +
    161B  SER      3.6    10.4    +      -       -      +
    162B  HIS*     1.3    75.6    -      -       -      +
    164B  ARG*     1.3    66.8    +      -       -      +
    165B  PHE      3.1     1.5    +      -       -      -
    166B  GLU*     2.8    23.6    +      -       -      +
    167B  HIS*     3.5     8.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 164 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144B  LEU*     3.3    23.3    +      -       +      +
    147B  ILE*     2.9    28.3    +      -       +      +
    149B  GLN*     2.9    56.9    +      -       -      +
    163B  ASN*     1.3    72.4    -      -       -      +
    165B  PHE*     1.3    58.3    +      -       -      +
    167B  HIS*     3.4     1.6    +      -       -      +
    168B  SER*     2.8    35.8    +      -       -      +
    207B  ASP*     2.7    38.9    +      -       +      -
    210B  HIS*     3.4    32.9    +      -       +      -
    214B  SER*     2.9    25.8    +      -       -      +
    215B  HIS*     5.0     0.8    -      -       -      +
    803B   ZN      3.9     4.2    -      -       -      -
    804B  DGT      3.0    28.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 165 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    154A  TYR*     4.3     0.2    -      -       -      -
    158A  PRO*     4.1    11.2    -      -       +      -
    136B  ILE*     4.2     4.3    -      -       +      -
    141B  PHE*     3.7    36.3    -      +       -      -
    142B  GLN*     3.5    24.0    -      -       -      -
    144B  LEU*     3.0    29.4    +      -       -      +
    145B  ARG*     3.3    40.4    -      -       +      +
    163B  ASN      3.1     0.4    -      -       -      -
    164B  ARG*     1.3    76.2    -      -       -      +
    166B  GLU*     1.3    78.7    +      -       -      +
    168B  SER*     3.1    14.6    +      -       -      -
    169B  LEU*     3.1    39.0    +      -       +      +
    801B  DGT      3.3    23.6    -      +       -      -
----------------------------------------------------------
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Residues in contact with GLU 166 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    154A  TYR*     2.6    25.9    +      -       -      -
    158A  PRO*     3.5    31.5    -      -       +      +
    159A  GLY*     5.3     1.7    -      -       -      -
    161A  SER*     3.5    22.0    +      -       -      -
    120B  ASP*     4.7     2.7    -      -       -      +
    162B  HIS*     3.5     6.5    -      -       +      +
    163B  ASN*     2.8    35.2    +      -       -      +
    165B  PHE*     1.3    79.3    -      -       -      +
    167B  HIS*     1.3    65.2    +      -       -      +
    169B  LEU*     3.4     9.1    +      -       -      +
    170B  GLY      3.1    16.6    +      -       -      -
    318B  ARG*     3.5    32.1    +      -       -      +
    322B  HIS*     5.9     1.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 167 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149B  GLN*     3.3    41.6    +      -       -      +
    163B  ASN      3.5     3.3    +      -       -      +
    164B  ARG*     3.4     8.0    +      -       -      +
    165B  PHE      3.3     0.4    -      -       -      -
    166B  GLU*     1.3    81.2    -      -       -      +
    168B  SER*     1.3    60.4    +      -       -      +
    170B  GLY*     3.0     3.3    +      -       -      -
    171B  VAL*     2.9    41.9    +      -       +      +
    206B  HIS*     3.4     5.2    +      +       -      -
    207B  ASP*     3.1    12.1    -      -       -      -
    311B  ASP*     3.1    19.5    -      -       -      -
    314B  ASP*     2.8    21.2    +      -       -      +
    315B  TYR*     3.9     9.5    -      +       +      +
    318B  ARG*     3.5    16.5    -      -       -      +
    803B   ZN      2.1    37.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 168 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141B  PHE*     3.9    10.3    -      -       -      -
    144B  LEU*     3.6    15.6    -      -       -      +
    164B  ARG      2.8    23.1    +      -       -      -
    165B  PHE      3.4     5.4    -      -       -      -
    167B  HIS*     1.3    74.6    -      -       -      +
    169B  LEU*     1.3    64.1    +      -       -      +
    171B  VAL      3.2     0.2    +      -       -      -
    172B  GLY      3.0    19.2    +      -       -      -
    203B  GLY      3.7     0.9    -      -       -      +
    204B  LEU*     3.4    33.4    +      -       -      -
    206B  HIS*     4.2    10.8    -      -       -      -
    207B  ASP*     3.9    16.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 169 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158A  PRO*     4.0    13.5    -      -       +      -
    118B  ILE*     3.8    28.0    -      -       +      -
    120B  ASP*     6.1     1.6    -      -       +      +
    126B  ILE*     4.5    12.7    -      -       +      +
    128B  LEU*     4.8    10.2    -      -       +      +
    136B  ILE*     3.7    34.8    -      -       +      -
    141B  PHE*     4.3     8.1    -      -       +      -
    165B  PHE*     3.1    45.1    +      -       +      +
    166B  GLU*     3.7     7.6    -      -       -      +
    168B  SER*     1.3    75.6    -      -       -      +
    170B  GLY*     1.3    58.3    -      -       -      +
    172B  GLY*     3.3     1.7    +      -       -      -
    173B  TYR*     2.9    29.2    +      -       -      +
    204B  LEU*     3.9    12.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 170 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123B  HIS*     3.7    13.9    -      -       -      -
    126B  ILE*     4.8     2.4    -      -       -      +
    166B  GLU      3.1     7.3    +      -       -      -
    167B  HIS      3.0     5.3    +      -       -      -
    169B  LEU*     1.3    76.8    -      -       -      +
    171B  VAL*     1.3    56.5    +      -       -      +
    173B  TYR*     3.3     4.9    +      -       -      +
    174B  LEU*     3.0    33.8    +      -       -      +
    314B  ASP*     3.3    24.0    -      -       -      -
    318B  ARG*     3.8     4.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 171 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167B  HIS*     2.9    46.4    +      -       +      +
    168B  SER      3.2     0.6    +      -       -      +
    170B  GLY*     1.3    72.8    -      -       -      +
    172B  GLY*     1.3    61.3    +      -       -      +
    174B  LEU*     3.4     3.8    +      -       -      -
    175B  ALA*     2.9    29.8    +      -       -      +
    203B  GLY*     3.5    21.5    -      -       -      +
    206B  HIS*     3.6    22.9    -      -       +      +
    301B  VAL*     4.7     3.6    -      -       +      -
    310B  VAL*     3.8    18.9    -      -       +      +
    311B  ASP*     3.8    15.5    -      -       +      +
    314B  ASP*     3.8    11.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 172 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128B  LEU*     6.5     0.9    -      -       -      -
    132B  LEU*     6.4     0.9    -      -       -      -
    168B  SER      3.0    12.0    +      -       -      -
    169B  LEU      3.7     3.6    -      -       -      -
    171B  VAL*     1.3    76.6    -      -       -      +
    173B  TYR*     1.3    61.2    +      -       -      +
    175B  ALA*     3.6     2.4    -      -       -      +
    176B  GLY      3.2    17.5    +      -       -      -
    200B  GLN*     3.7    21.7    -      -       -      +
    203B  GLY*     3.6     3.0    -      -       -      -
    204B  LEU*     3.6    28.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 173 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123B  HIS*     3.6    47.2    +      +       +      -
    125B  HIS      4.9     4.7    +      -       -      -
    126B  ILE*     3.7    43.3    -      -       +      -
    127B  GLU      5.2     3.1    -      -       -      -
    128B  LEU*     6.1     1.9    -      -       -      +
    169B  LEU      2.9    14.1    +      -       -      +
    170B  GLY      3.5     5.8    -      -       -      +
    171B  VAL      3.3     0.2    -      -       -      -
    172B  GLY*     1.3    75.7    -      -       -      +
    174B  LEU*     1.3    70.1    +      -       +      +
    176B  GLY*     3.3     4.2    +      -       -      -
    177B  CYS*     2.9    51.9    +      -       -      -
    200B  GLN*     5.3     4.3    +      -       -      +
    331B  TYR*     4.3     5.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 174 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123B  HIS*     3.7    23.3    -      -       +      +
    170B  GLY      3.0    16.1    +      -       -      +
    171B  VAL      4.0     1.1    -      -       -      +
    173B  TYR*     1.3    82.7    -      -       +      +
    175B  ALA*     1.3    60.3    +      -       -      +
    177B  CYS*     3.1     7.3    +      -       +      +
    178B  LEU*     2.9    31.7    +      -       -      +
    310B  VAL*     3.7    25.4    -      -       +      +
    313B  TRP*     3.9    14.1    -      -       +      -
    314B  ASP*     3.7    30.7    -      -       +      +
    331B  TYR*     3.3    41.3    -      -       +      +
    335B  ILE*     5.0     1.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 175 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    171B  VAL      2.9    18.1    +      -       -      +
    172B  GLY      3.6     5.2    -      -       -      +
    174B  LEU*     1.3    75.5    -      -       -      +
    176B  GLY*     1.3    63.9    +      -       -      +
    179B  VAL*     3.1    29.5    +      -       -      +
    199B  VAL*     3.6    35.7    -      -       +      +
    203B  GLY*     4.5     0.9    -      -       -      -
    300B  ILE*     3.7    18.3    -      -       +      +
    301B  VAL*     4.0     9.4    -      -       +      -
    310B  VAL*     3.9     3.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 176 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172B  GLY      3.2     8.7    +      -       -      -
    173B  TYR      3.6     3.4    -      -       -      -
    175B  ALA*     1.3    79.7    -      -       -      +
    177B  CYS*     1.3    54.4    +      -       -      +
    179B  VAL*     4.1     2.1    -      -       -      +
    180B  HIS*     2.9    33.9    +      -       -      +
    196B  VAL*     4.7     9.7    -      -       -      +
    200B  GLN*     3.6    29.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with CYS 177 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173B  TYR*     2.9    59.7    +      -       -      +
    174B  LEU*     3.1    14.3    +      -       +      +
    176B  GLY*     1.3    76.5    -      -       -      +
    178B  LEU*     1.3    58.4    +      -       -      +
    180B  HIS*     3.8     4.9    -      -       -      +
    181B  ALA*     3.0    28.9    +      -       -      +
    331B  TYR*     5.3     1.8    -      -       -      -
    335B  ILE*     4.4    14.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 178 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    174B  LEU      2.9    15.2    +      -       -      +
    175B  ALA      4.0     2.9    -      -       -      +
    177B  CYS*     1.3    74.2    -      -       -      +
    179B  VAL*     1.3    68.1    +      -       -      +
    181B  ALA*     3.2     3.3    +      -       +      +
    182B  LEU*     3.0    52.1    +      -       +      +
    299B  GLU      5.2     1.1    -      -       -      +
    300B  ILE*     3.8    25.4    -      -       +      -
    309B  ASP*     6.4     0.9    -      -       -      -
    310B  VAL*     4.2    12.6    -      -       +      -
    313B  TRP*     4.1    20.6    -      -       +      -
    334B  PHE*     5.4     1.8    -      -       +      -
    335B  ILE*     4.1    31.0    -      -       +      +
    338B  ALA*     4.4    13.2    -      -       +      -
    349B  ILE*     4.3    12.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 179 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    175B  ALA      3.1    17.6    +      -       -      +
    176B  GLY*     4.1     4.0    -      -       -      +
    178B  LEU*     1.3    77.0    -      -       -      +
    180B  HIS*     1.3    60.3    +      -       -      +
    182B  LEU*     3.3     8.9    +      -       -      +
    183B  GLY*     3.1    18.7    +      -       -      -
    191B  ILE*     3.6    32.5    -      -       +      +
    196B  VAL*     4.1    16.8    -      -       +      +
    199B  VAL*     3.4    20.6    -      -       +      -
    296B  PHE*     5.4     0.4    -      -       +      -
    297B  LEU*     3.8    15.7    -      -       +      -
    300B  ILE*     3.2    29.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 180 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    176B  GLY      2.9    19.2    +      -       -      +
    177B  CYS*     3.8     4.9    -      -       -      +
    179B  VAL*     1.3    76.9    -      -       -      +
    181B  ALA*     1.3    63.3    +      -       -      +
    183B  GLY*     3.3     2.6    +      -       -      -
    184B  GLU*     3.0    62.9    +      -       +      +
    191B  ILE*     6.0     0.2    -      -       -      -
    196B  VAL*     4.9    16.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 181 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    177B  CYS      3.0    18.9    +      -       -      +
    178B  LEU*     3.2     5.4    +      -       +      +
    180B  HIS*     1.3    77.7    -      -       -      +
    182B  LEU*     1.3    64.0    +      -       +      +
    184B  GLU*     3.4     5.5    +      -       -      +
    185B  LYS*     3.1    27.4    +      -       -      +
    335B  ILE*     3.7    29.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 182 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    178B  LEU*     3.0    35.3    +      -       +      +
    179B  VAL*     3.8     7.9    -      -       -      +
    181B  ALA*     1.3    77.1    -      -       +      +
    183B  GLY*     1.3    57.6    +      -       -      +
    185B  LYS*     3.4     4.9    +      -       -      +
    186B  GLN*     2.9    34.0    +      -       -      +
    189B  LEU*     4.0     1.1    -      -       -      +
    191B  ILE*     4.2     8.7    -      -       +      -
    296B  PHE*     4.2    11.9    -      -       +      -
    300B  ILE*     4.9     2.7    -      -       +      -
    335B  ILE      5.7     0.9    -      -       -      +
    338B  ALA*     3.8    39.3    -      -       +      +
    339B  ARG*     4.0    15.9    -      -       -      +
    340B  VAL*     4.1    20.0    -      -       +      -
    349B  ILE*     4.1    21.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 183 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    179B  VAL      3.1    11.9    +      -       -      -
    180B  HIS*     3.7     3.1    -      -       -      -
    182B  LEU*     1.3    75.8    -      -       -      +
    184B  GLU*     1.3    65.7    +      -       -      +
    186B  GLN      3.4     5.1    -      -       -      +
    187B  PRO*     3.3    26.0    -      -       -      +
    191B  ILE*     3.6    26.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 184 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    180B  HIS*     3.0    55.6    +      -       +      +
    181B  ALA*     3.9     5.4    -      -       -      +
    183B  GLY*     1.3    76.6    -      -       -      +
    185B  LYS*     1.3    66.0    +      -       +      +
    187B  PRO*     4.1     9.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 185 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    181B  ALA      3.1    17.6    +      -       -      +
    182B  LEU*     3.9     4.9    -      -       -      +
    184B  GLU*     1.3    81.8    +      -       +      +
    186B  GLN*     1.3    71.1    +      -       +      +
    187B  PRO*     3.6     6.3    -      -       -      +
    188B  GLU*     4.9     0.2    -      -       -      +
    336B  LYS      6.1     1.8    -      -       -      +
    338B  ALA      5.6     7.6    -      -       -      +
    339B  ARG*     4.5    19.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 186 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    182B  LEU*     2.9    14.8    +      -       -      +
    183B  GLY*     3.4     8.3    -      -       -      +
    185B  LYS*     1.3    87.1    -      -       +      +
    187B  PRO*     1.3    66.5    -      -       -      +
    188B  GLU*     3.0    33.6    +      -       -      +
    189B  LEU*     3.0    33.0    +      -       +      +
    190B  GLN      4.6     0.2    +      -       -      -
    339B  ARG*     3.5    38.1    -      -       -      +
    340B  VAL*     2.8    51.3    +      -       -      +
    527B  ASN*     4.2     4.0    +      -       -      -
----------------------------------------------------------
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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