Contacts of the helix formed by residues 213 - 237 (chain C) in PDB entry 1C3Q


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 213 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     -6C  HIS      5.6     0.4    -      -       -      +
     -4C  HIS*     5.6     1.8    +      -       -      -
    176C  ASP*     5.2     4.6    +      -       -      +
    179C  HIS*     6.4     0.2    -      -       -      -
    211C  GLU*     3.0    19.5    +      -       -      +
    212C  GLU*     1.3    82.3    -      -       +      +
    214C  PRO*     1.3    63.4    -      -       -      +
    215C  LEU*     2.8    27.1    +      -       -      +
    216C  PHE*     3.1    36.1    +      -       +      -
    217C  ALA*     2.9    26.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 214 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    -10C  ARG*     5.2     4.0    -      -       -      +
    118C  ALA*     3.5    43.1    -      -       +      +
    119C  ALA*     4.9     1.6    -      -       +      -
    164C  VAL*     3.9    12.3    -      -       +      +
    208C  CYS*     4.2    11.7    -      -       -      -
    211C  GLU      4.6     0.6    -      -       -      +
    212C  GLU      3.1    11.9    -      -       -      +
    213C  ASN*     1.3    87.1    -      -       -      +
    215C  LEU*     1.3    57.7    +      -       -      +
    217C  ALA*     3.6     9.5    -      -       +      +
    218C  ALA*     2.9    31.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 215 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     -4C  HIS*     4.4     2.9    -      -       +      -
    164C  VAL*     3.6    16.5    -      -       +      +
    174C  ILE*     3.8    36.1    -      -       +      +
    175C  ALA*     4.3     9.9    -      -       -      +
    176C  ASP*     4.0    16.4    -      -       -      +
    179C  HIS*     3.9    28.0    -      -       +      +
    181C  TYR*     4.1    13.7    -      -       +      -
    213C  ASN*     2.8    20.0    +      -       -      +
    214C  PRO*     1.3    77.1    -      -       -      +
    216C  PHE*     1.3    69.5    +      -       +      +
    218C  ALA*     3.3     1.7    +      -       -      +
    219C  ILE*     2.9    47.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 216 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     -6C  HIS*     3.3    45.3    -      -       +      -
     -5C  HIS*     4.0     4.7    -      +       -      -
     -4C  HIS*     3.4    51.4    -      +       -      -
      1C  MET*     3.9    36.7    -      -       +      +
      9C  CYS*     5.4     0.7    -      -       -      -
    181C  TYR*     4.4     0.7    -      +       -      -
    211C  GLU*     4.1    13.7    -      -       +      +
    213C  ASN*     3.1    32.2    +      -       +      +
    215C  LEU*     1.3    86.4    -      -       +      +
    217C  ALA*     1.3    66.5    +      -       -      +
    219C  ILE*     3.3     6.5    +      -       +      +
    220C  ALA*     2.9    26.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 217 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9C  CYS*     5.3     0.2    -      -       -      -
    204C  VAL      5.1     0.7    -      -       -      -
    207C  PHE*     3.4    16.9    -      -       -      +
    208C  CYS*     3.7    39.5    -      -       -      +
    211C  GLU*     3.7    18.5    -      -       +      +
    213C  ASN      2.9    16.6    +      -       -      +
    214C  PRO*     3.6     5.8    -      -       +      +
    216C  PHE*     1.3    78.8    -      -       -      +
    218C  ALA*     1.3    57.0    +      -       -      +
    220C  ALA*     3.4     3.5    +      -       -      +
    221C  ALA*     2.9    23.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 218 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119C  ALA*     5.5     2.0    -      -       +      -
    164C  VAL*     4.6     6.5    -      -       +      -
    166C  ALA*     5.1     4.0    -      -       +      -
    174C  ILE*     4.3    17.7    -      -       +      -
    204C  VAL*     4.1    25.3    -      -       +      +
    214C  PRO      2.9    19.5    +      -       -      +
    215C  LEU      3.7     3.4    -      -       -      +
    217C  ALA*     1.3    74.0    -      -       -      +
    219C  ILE*     1.3    65.9    +      -       -      +
    221C  ALA*     4.3     0.4    -      -       -      -
    222C  ILE*     2.9    39.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 219 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1C  MET*     3.7    25.4    -      -       +      -
    174C  ILE*     4.4    14.8    -      -       +      -
    181C  TYR*     3.6    37.0    -      -       +      -
    183C  LEU*     3.9    14.9    -      -       +      +
    215C  LEU*     2.9    38.3    +      -       +      +
    216C  PHE      3.6     3.6    -      -       -      +
    218C  ALA*     1.3    75.7    -      -       -      +
    220C  ALA*     1.3    59.0    +      -       -      +
    223C  SER*     2.8    35.3    +      -       -      +
    266C  ILE*     3.7    35.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 220 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1C  MET*     4.2     1.1    -      -       +      -
      6C  ALA*     3.7    34.3    -      -       -      +
      9C  CYS*     3.7    12.8    -      -       +      -
    207C  PHE*     3.7    21.3    -      -       +      -
    216C  PHE      2.9    17.6    +      -       -      +
    217C  ALA      3.7     0.9    -      -       -      +
    219C  ILE*     1.3    78.9    -      -       -      +
    221C  ALA*     1.3    57.4    +      -       -      +
    223C  SER*     3.9     0.5    -      -       -      -
    224C  SER*     2.9    36.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 221 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    200C  LEU*     4.6     2.2    -      -       +      -
    203C  VAL*     3.9     6.9    -      -       +      +
    204C  VAL*     3.6    35.0    -      -       +      +
    207C  PHE*     3.6    25.0    -      -       +      -
    217C  ALA      2.9    18.1    +      -       -      +
    218C  ALA      3.7     4.3    -      -       -      +
    220C  ALA*     1.3    78.1    -      -       -      +
    222C  ILE*     1.3    57.6    -      -       -      +
    224C  SER*     3.7     1.7    -      -       -      -
    225C  TYR*     2.9    31.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 222 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121C  ARG*     5.0     1.8    -      -       +      -
    166C  ALA*     4.2    11.9    -      -       +      -
    168C  THR*     4.7     9.6    -      -       +      -
    172C  ASP*     3.7    22.7    -      -       -      +
    174C  ILE*     3.4    32.1    -      -       +      -
    183C  LEU*     3.6    19.7    -      -       +      -
    185C  ASN*     5.3     0.7    -      -       -      +
    200C  LEU*     4.0    31.4    -      -       +      -
    204C  VAL*     4.3    11.2    -      -       +      -
    218C  ALA*     2.9    19.5    +      -       +      +
    221C  ALA*     1.3    74.4    -      -       -      +
    223C  SER*     1.3    58.0    +      -       -      +
    225C  TYR*     3.7     1.4    -      -       -      +
    226C  GLY*     2.9    27.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 223 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6C  ALA*     4.7     3.6    -      -       -      -
    183C  LEU*     4.0     8.2    -      -       -      +
    185C  ASN*     4.5    13.5    +      -       -      +
    219C  ILE      2.8    22.6    +      -       -      -
    220C  ALA*     3.9     4.5    -      -       -      -
    222C  ILE*     1.3    77.8    -      -       -      +
    224C  SER*     1.3    57.9    +      -       -      +
    226C  GLY*     3.1     2.1    +      -       -      -
    227C  VAL*     2.9    35.3    +      -       -      +
    260C  VAL*     5.1     0.7    -      -       -      -
    264C  ALA*     4.2    14.6    -      -       -      -
    266C  ILE*     3.3    32.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 224 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6C  ALA      4.4     2.1    +      -       -      -
     10C  LEU*     4.0    15.9    -      -       -      +
     39C  LEU*     6.1     1.1    -      -       -      -
    207C  PHE*     3.7    22.5    -      -       -      -
    220C  ALA      2.9    21.9    +      -       -      -
    221C  ALA      3.7     3.6    -      -       -      -
    223C  SER*     1.3    74.9    -      -       -      +
    225C  TYR*     1.3    63.2    +      -       -      +
    227C  VAL*     3.3     3.2    +      -       -      +
    228C  ALA*     3.0    24.3    +      -       -      +
    252C  LEU*     5.6     0.9    -      -       -      -
    255C  VAL*     4.8     6.1    -      -       -      +
    260C  VAL*     3.9    29.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 225 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    190C  LEU*     4.2    26.7    -      -       +      -
    196C  ALA*     2.6    39.7    +      -       -      +
    199C  LEU*     3.7    34.7    -      -       +      +
    200C  LEU*     3.7    32.1    -      -       +      -
    203C  VAL*     4.1    17.0    -      -       +      +
    221C  ALA      2.9    17.5    +      -       -      +
    222C  ILE      3.7     4.0    -      -       -      +
    224C  SER*     1.3    76.2    -      -       -      +
    226C  GLY*     1.3    57.7    +      -       -      +
    228C  ALA*     3.3     7.6    +      -       -      +
    229C  ALA*     2.9    28.8    +      -       -      +
    248C  LEU*     3.8    15.8    -      -       +      +
    252C  LEU*     3.9    23.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 226 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    185C  ASN*     4.0     7.4    -      -       -      -
    186C  GLY*     3.5    24.3    +      -       -      -
    190C  LEU*     5.7     0.7    -      -       -      -
    222C  ILE      2.9    15.4    +      -       -      -
    223C  SER      3.5     3.4    -      -       -      -
    225C  TYR*     1.3    77.5    -      -       -      +
    227C  VAL*     1.3    59.6    +      -       -      +
    229C  ALA*     3.1     5.5    +      -       -      +
    230C  GLN*     2.9    32.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 227 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    185C  ASN*     4.4     5.8    -      -       -      +
    223C  SER      2.9    21.2    +      -       -      +
    224C  SER*     3.7     5.8    -      -       -      +
    226C  GLY*     1.3    74.8    -      -       -      +
    228C  ALA*     1.3    64.5    +      -       -      +
    230C  GLN*     3.1    10.6    +      -       -      +
    231C  LEU*     2.9    40.4    +      -       +      +
    255C  VAL*     4.1    12.8    -      -       +      -
    259C  ASP*     4.1    17.3    -      -       +      +
    260C  VAL*     4.3     9.4    -      -       +      -
    263C  TRP*     4.0    15.7    -      -       +      -
    264C  ALA*     3.9    29.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 228 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    224C  SER      3.0    14.1    +      -       -      +
    225C  TYR      3.3     8.9    +      -       -      +
    227C  VAL*     1.3    78.0    -      -       -      +
    229C  ALA*     1.3    56.3    +      -       -      +
    231C  LEU*     3.5     6.4    +      -       -      -
    232C  ALA*     3.0    27.7    +      -       -      +
    248C  LEU*     4.3     3.8    -      -       +      +
    251C  LYS*     3.4    28.3    -      -       +      +
    252C  LEU*     3.8    26.2    -      -       +      -
    255C  VAL*     4.5     7.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 229 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    186C  GLY*     4.4     4.7    -      -       -      -
    187C  HIS*     4.6     3.6    -      -       -      +
    190C  LEU*     4.0    38.1    -      -       +      -
    225C  TYR      2.9    14.1    +      -       -      +
    226C  GLY*     3.4     9.6    -      -       -      +
    227C  VAL      3.1     0.2    -      -       -      -
    228C  ALA*     1.3    74.8    -      -       -      +
    230C  GLN*     1.3    59.2    +      -       -      +
    232C  ALA*     3.1     4.5    +      -       -      +
    233C  ALA*     2.9    30.2    +      -       -      +
    244C  PHE*     3.6     6.3    -      -       +      -
    248C  LEU*     4.0    12.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 230 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    184C  HIS      4.1     1.4    -      -       -      +
    185C  ASN*     2.9    27.3    +      -       -      +
    186C  GLY      2.8    41.8    +      -       -      +
    187C  HIS*     4.8     2.2    -      -       +      +
    226C  GLY      2.9    15.6    +      -       -      +
    227C  VAL*     3.6     8.1    -      -       -      +
    229C  ALA*     1.3    75.6    -      -       -      +
    231C  LEU*     1.3    62.2    +      -       +      +
    233C  ALA*     3.2     6.6    +      -       -      +
    234C  GLN*     2.8    41.1    +      -       -      +
    263C  TRP*     4.5    19.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 231 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    227C  VAL*     2.9    35.4    +      -       +      +
    228C  ALA*     3.7     5.2    -      -       -      +
    230C  GLN*     1.3    78.3    -      -       +      +
    232C  ALA*     1.3    61.8    +      -       -      +
    234C  GLN*     3.6    21.3    +      -       +      +
    235C  GLN*     3.7     6.4    +      -       -      +
    251C  LYS*     3.8    30.4    -      -       +      -
    255C  VAL*     4.2    12.6    -      -       +      -
    259C  ASP*     4.0    24.0    -      -       -      +
    263C  TRP*     4.6    18.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 232 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    228C  ALA      3.0    17.5    +      -       -      +
    229C  ALA*     3.1     6.3    +      -       -      +
    231C  LEU*     1.3    75.4    -      -       -      +
    233C  ALA*     1.3    65.0    +      -       -      +
    235C  GLN      3.2     8.8    +      -       -      -
    236C  THR*     2.9    19.5    +      -       -      -
    244C  PHE*     3.7    14.6    -      -       +      -
    247C  GLU*     3.6    30.0    -      -       +      +
    248C  LEU*     3.8    19.5    -      -       -      +
    251C  LYS*     3.7     2.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 233 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    187C  HIS*     3.4    47.3    -      -       +      +
    189C  LEU*     4.2     2.5    -      -       +      -
    229C  ALA      2.9    13.6    +      -       -      +
    230C  GLN*     3.2     5.1    +      -       -      +
    232C  ALA*     1.3    75.0    -      -       -      +
    234C  GLN*     1.3    64.2    +      -       -      +
    236C  THR*     4.1     1.6    -      -       -      -
    237C  ALA*     2.6    34.9    +      -       -      +
    244C  PHE*     3.7    12.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 234 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    230C  GLN*     2.8    37.9    +      -       -      +
    231C  LEU*     3.6    17.3    -      -       +      +
    232C  ALA      3.3     0.2    -      -       -      -
    233C  ALA*     1.3    78.8    -      -       -      +
    235C  GLN*     1.3    60.8    +      -       +      +
    237C  ALA*     4.8     2.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 235 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    231C  LEU      3.7     4.4    +      -       -      +
    232C  ALA      3.2     7.0    +      -       -      +
    233C  ALA      3.0     1.0    -      -       -      -
    234C  GLN*     1.3    83.3    -      -       +      +
    236C  THR*     1.3    64.2    +      -       +      +
    239C  LYS*     3.4    19.2    +      -       -      -
    247C  GLU*     2.4    37.3    +      -       +      +
    251C  LYS*     2.8    18.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 236 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    189C  LEU*     4.7     1.4    -      -       -      +
    232C  ALA      2.9    13.3    +      -       -      -
    233C  ALA      3.0     0.6    +      -       -      -
    235C  GLN*     1.3    87.3    -      -       +      +
    237C  ALA*     1.3    66.3    +      -       -      +
    238C  ASP      3.0     3.4    -      -       -      -
    239C  LYS*     2.8    24.3    +      -       +      +
    240C  GLY*     3.2    11.6    +      -       -      +
    243C  SER*     3.5    33.2    -      -       -      +
    244C  PHE*     3.2    30.4    -      -       -      +
    247C  GLU*     4.0    14.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 237 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    187C  HIS*     4.7     9.0    -      -       +      +
    189C  LEU*     3.8    24.0    -      -       +      +
    233C  ALA*     2.6    27.2    +      -       +      +
    234C  GLN*     4.7     2.4    +      -       -      +
    235C  GLN      4.0     0.2    -      -       -      -
    236C  THR*     1.3    72.5    +      -       -      +
    238C  ASP*     1.3    59.1    +      -       -      +
    240C  GLY*     4.3     5.2    +      -       -      -
----------------------------------------------------------
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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