Contacts of the helix formed by residues 152 - 180 (chain A) in PDB entry 3ZVU


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 SER 152 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    147A  MET*     3.8     3.1    -      -       -      -
    150A  GLY      4.4     0.4    +      -       -      -
    151A  ASN*     1.3    73.8    -      -       -      +
    153A  GLU*     1.3    63.8    +      -       -      +
    154A  ASP*     3.6     9.1    +      -       -      +
    155A  ASP*     3.2    29.6    +      -       -      -
    156A  THR*     2.9    28.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 153 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25A  LEU*     6.5     0.7    -      -       -      -
     29A  SER      5.0     2.9    -      -       -      +
     30A  CYS*     3.7    15.8    -      -       +      +
    147A  MET*     3.6    27.4    -      -       +      +
    152A  SER*     1.3    75.8    -      -       -      +
    154A  ASP*     1.3    65.1    +      -       -      +
    156A  THR*     3.2     3.1    +      -       -      -
    157A  ARG*     2.9    59.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 154 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    152A  SER*     3.2     7.9    +      -       -      +
    153A  GLU*     1.3    83.9    -      -       -      +
    155A  ASP*     1.3    66.4    +      -       -      +
    157A  ARG*     4.1    15.7    +      -       -      +
    158A  MET*     3.0    26.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 155 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    150A  GLY      4.5     2.3    -      -       -      +
    151A  ASN*     3.0    28.7    -      -       +      +
    152A  SER*     3.2    33.9    +      -       -      +
    154A  ASP*     1.3    79.6    -      -       -      +
    156A  THR*     1.3    57.7    +      -       -      +
    158A  MET*     3.4     0.7    +      -       -      -
    159A  PHE*     3.0    28.6    +      -       -      +
    381B  LYS*     4.6    10.4    +      -       -      +
    383B  ILE*     3.7    38.1    -      -       +      +
    384B  GLN*     5.2     1.2    +      -       -      +
    385B  TRP*     4.2     2.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 156 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30A  CYS*     3.7    11.7    -      -       -      -
    117A  LEU*     4.9     3.8    -      -       +      -
    145A  VAL*     3.6    29.2    -      -       +      -
    146A  ASP      4.0     4.0    -      -       -      +
    147A  MET*     3.4     5.4    -      -       -      +
    148A  PRO*     3.3    32.9    -      -       +      +
    151A  ASN*     4.1     2.4    -      -       -      +
    152A  SER      2.9    16.8    +      -       -      -
    153A  GLU      3.2     4.5    +      -       -      -
    155A  ASP*     1.3    74.9    -      -       -      +
    157A  ARG*     1.3    60.5    +      -       -      +
    159A  PHE*     3.3     3.3    +      -       -      +
    160A  ALA*     2.9    28.8    +      -       +      +
    385B  TRP*     4.0    12.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 157 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1A  MET*     5.2    11.7    -      -       -      +
     30A  CYS*     3.8    17.0    -      -       +      -
     31A  SER      3.1    22.3    +      -       -      +
     32A  SER*     3.6    19.9    +      -       -      +
    143A  TYR*     3.4    16.2    -      -       -      +
    153A  GLU*     2.9    51.2    +      -       -      +
    154A  ASP*     4.1    12.6    +      -       -      +
    156A  THR*     1.3    77.3    -      -       -      +
    158A  MET*     1.3    58.9    +      -       -      +
    161A  ASP*     2.7    41.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 158 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    154A  ASP      3.0    19.8    +      -       -      +
    155A  ASP      3.7     2.0    -      -       -      +
    156A  THR      3.2     0.2    -      -       -      -
    157A  ARG*     1.3    75.7    -      -       -      +
    159A  PHE*     1.3    60.3    +      -       -      +
    161A  ASP*     4.1     5.3    -      -       +      +
    162A  THR*     2.7    35.3    +      -       -      +
    381B  LYS*     3.4    34.1    -      -       +      -
    383B  ILE*     2.6    40.6    -      -       +      -
    391B  PHE*     3.4    40.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 159 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87A  LEU*     6.4     0.4    -      -       +      -
     88A  PRO*     3.8     8.1    -      -       +      -
    117A  LEU*     4.3    16.4    -      -       +      -
    155A  ASP      3.0    14.2    +      -       -      +
    156A  THR      3.6     6.3    -      -       -      +
    158A  MET*     1.3    78.8    -      -       -      +
    160A  ALA*     1.3    68.6    +      -       -      +
    162A  THR*     3.4     3.6    +      -       -      -
    163A  VAL*     3.4    26.5    +      -       +      +
    192A  A8S      3.1    43.7    -      -       +      -
    383B  ILE*     4.5     2.2    -      -       +      +
    385B  TRP*     3.6    46.9    -      +       +      -
    391B  PHE      3.7    11.1    +      -       -      +
    392B  GLY*     3.3    36.3    -      -       -      -
    393B  VAL*     4.1    11.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 160 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117A  LEU*     5.5     3.1    -      -       +      -
    120A  TYR*     4.4    14.8    -      -       +      -
    143A  TYR*     3.4    33.7    -      -       +      +
    145A  VAL*     5.3     3.1    -      -       +      -
    156A  THR*     2.9    17.5    +      -       +      +
    159A  PHE*     1.3    82.1    -      -       +      +
    161A  ASP*     1.3    57.2    +      -       -      +
    163A  VAL*     3.1     3.8    +      -       -      +
    164A  VAL*     2.9    31.9    +      -       +      +
    192A  A8S      4.5    10.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 161 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32A  SER*     3.0    13.3    +      -       -      -
     34A  HIS*     2.9    36.8    +      -       +      +
    143A  TYR*     2.5    25.9    +      -       -      -
    157A  ARG*     2.7    35.1    +      -       -      +
    158A  MET*     4.1     5.2    -      -       +      +
    160A  ALA*     1.3    71.4    -      -       -      +
    162A  THR*     1.3    56.0    +      -       -      +
    164A  VAL*     4.4     0.7    -      -       -      +
    165A  LYS*     2.8    47.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 162 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61A  PHE*     5.1     1.5    -      -       +      -
    158A  MET*     2.7    24.0    +      -       -      +
    159A  PHE      3.6     5.2    -      -       -      -
    161A  ASP*     1.3    76.2    -      -       -      +
    163A  VAL*     1.3    62.8    +      -       -      +
    165A  LYS*     4.3     8.9    -      -       -      +
    166A  LEU*     3.3    21.3    +      -       -      +
    391B  PHE*     3.6    38.1    -      -       +      +
    393B  VAL*     4.3    13.2    -      -       +      -
    404B  TYR*     4.1    25.7    -      -       +      -
    405B  LEU*     4.9     0.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 163 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61A  PHE*     3.9    28.7    -      -       +      -
    159A  PHE*     3.4    23.3    +      -       +      +
    160A  ALA      3.1     8.0    +      -       -      +
    162A  THR*     1.3    78.5    -      -       -      +
    164A  VAL*     1.3    63.3    +      -       -      +
    166A  LEU*     3.2     3.5    +      -       -      +
    167A  ASN*     3.0    35.0    +      -       -      +
    192A  A8S      3.5    59.2    -      -       +      +
    393B  VAL*     4.9     7.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 164 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     34A  HIS*     3.6    27.1    -      -       +      -
    120A  TYR*     3.5    24.5    -      -       -      +
    141A  GLU*     3.7    28.0    -      -       +      +
    143A  TYR*     4.1    12.1    -      -       +      -
    160A  ALA      2.9    22.4    +      -       -      +
    161A  ASP      4.1     1.6    -      -       -      +
    163A  VAL*     1.3    72.2    -      -       -      +
    165A  LYS*     1.3    58.4    +      -       -      +
    167A  ASN*     3.1     8.8    +      -       -      +
    168A  LEU*     2.8    44.2    +      -       +      +
    192A  A8S      4.3    10.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 165 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     34A  HIS*     3.7    33.9    -      -       +      +
     36A  GLN*     4.9     0.3    -      -       -      +
    161A  ASP*     2.8    33.5    +      -       +      +
    162A  THR*     4.3     7.0    -      -       -      +
    164A  VAL*     1.3    72.5    -      -       -      +
    166A  LEU*     1.3    58.1    +      -       -      +
    168A  LEU*     3.3     6.3    +      -       -      +
    169A  GLN*     2.9    41.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 166 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60A  PRO*     3.7    16.6    -      -       +      +
     61A  PHE*     4.1    10.5    -      -       +      -
    162A  THR      3.3    15.2    +      -       -      +
    163A  VAL*     3.2     6.9    +      -       -      +
    165A  LYS*     1.3    74.9    -      -       -      +
    167A  ASN*     1.3    66.0    +      -       -      +
    169A  GLN*     3.4    22.7    +      -       +      +
    170A  LYS*     3.0    23.7    +      -       -      +
    323B  GLU*     4.0    14.4    -      -       +      +
    324B  THR*     3.6    32.1    -      -       +      -
    404B  TYR*     3.7    41.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 167 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58A  TYR*     3.5    27.3    -      -       +      +
     59A  LYS*     3.5    17.8    -      -       -      +
     60A  PRO*     3.5    18.4    -      -       -      +
     61A  PHE*     4.8     4.2    -      -       -      -
    141A  GLU*     5.3     5.0    +      -       -      +
    163A  VAL*     3.0    29.2    +      -       -      +
    164A  VAL*     3.5     9.6    -      -       +      +
    166A  LEU*     1.3    74.1    -      -       -      +
    168A  LEU*     1.3    60.7    +      -       +      +
    170A  LYS      3.3     1.2    +      -       -      -
    171A  LEU*     2.9    27.9    +      -       -      +
    192A  A8S      3.4    36.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 168 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     34A  HIS*     3.8    34.5    -      -       +      +
     35A  ALA      4.6     1.6    -      -       -      +
     36A  GLN*     3.5    32.9    -      -       +      +
     58A  TYR*     5.7     3.1    -      -       +      -
    124A  THR*     5.2     0.7    -      -       +      -
    139A  VAL*     3.5    31.9    -      -       +      -
    141A  GLU*     4.2    24.5    -      -       +      +
    164A  VAL*     2.8    28.6    +      -       +      +
    165A  LYS*     3.9     5.2    -      -       -      +
    167A  ASN*     1.3    80.2    -      -       +      +
    169A  GLN*     1.3    62.0    +      -       -      +
    171A  LEU*     3.2    14.9    +      -       +      +
    172A  ALA      3.0    18.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 169 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36A  GLN*     4.0    17.4    +      -       -      +
    165A  LYS*     2.9    29.5    +      -       +      +
    166A  LEU*     3.4    25.6    +      -       +      +
    168A  LEU*     1.3    74.4    -      -       -      +
    170A  LYS*     1.3    57.5    +      -       -      +
    172A  ALA*     3.3     5.4    +      -       -      +
    173A  THR*     3.0    31.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 170 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56A  GLN      5.7     1.3    -      -       -      -
     57A  THR      4.4     9.6    -      -       -      -
     58A  TYR*     3.3    31.9    -      -       -      +
     60A  PRO*     4.1    21.1    -      -       +      +
    166A  LEU      3.0    15.7    +      -       -      +
    169A  GLN*     1.3    73.2    -      -       -      +
    171A  LEU*     1.3    60.9    +      -       -      +
    173A  THR*     3.1    10.8    +      -       +      -
    174A  VAL*     2.7    47.0    +      -       +      +
    322B  SER*     4.0    16.8    -      -       -      +
    323B  GLU*     3.1    33.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 171 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38A  ILE*     3.7    19.3    -      -       +      -
     45A  VAL*     4.2     5.8    -      -       +      +
     48A  ILE*     3.7    40.4    -      -       +      -
     49A  VAL*     3.6    28.0    -      -       +      -
     58A  TYR*     3.8    22.1    -      -       +      +
    124A  THR*     5.9     0.2    -      -       +      -
    139A  VAL*     4.0    12.3    -      -       +      -
    167A  ASN      2.9    13.8    +      -       -      +
    168A  LEU*     3.5    23.3    -      -       +      +
    170A  LYS*     1.3    78.4    -      -       -      +
    172A  ALA*     1.3    57.1    +      -       -      +
    174A  VAL*     4.6     1.3    -      -       -      -
    175A  ALA*     2.9    34.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 172 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36A  GLN*     4.0    21.5    -      -       -      +
     37A  ARG      4.3     2.2    -      -       -      +
     38A  ILE*     3.7    23.4    -      -       +      +
    168A  LEU      3.0    12.2    +      -       -      +
    169A  GLN*     3.4     9.4    -      -       -      +
    170A  LYS      3.2     0.2    -      -       -      -
    171A  LEU*     1.3    77.0    -      -       -      +
    173A  THR*     1.3    58.1    +      -       -      +
    176A  GLU*     2.9    43.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 173 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169A  GLN*     3.0    15.0    +      -       -      +
    170A  LYS*     3.1    13.4    +      -       +      -
    172A  ALA*     1.3    76.4    -      -       -      +
    174A  VAL*     1.3    68.1    +      -       +      +
    176A  GLU*     4.0     5.7    -      -       -      +
    177A  ALA*     3.2    24.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 174 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48A  ILE*     4.0    24.0    -      -       +      -
     57A  THR*     3.9    26.5    -      -       -      +
     58A  TYR*     5.0     0.9    -      -       +      -
    170A  LYS*     2.7    39.8    +      -       +      +
    171A  LEU*     4.0     4.5    -      -       -      +
    173A  THR*     1.3    74.4    -      -       +      +
    175A  ALA*     1.3    62.2    +      -       -      +
    177A  ALA*     3.6     6.1    +      -       -      +
    178A  MET*     3.2    29.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 175 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38A  ILE*     3.9    16.6    -      -       +      -
     40A  ALA*     4.2     4.3    -      -       +      -
     44A  LEU*     3.7     7.0    -      -       +      +
     45A  VAL*     4.1    17.9    -      -       +      +
     48A  ILE*     3.9    22.9    -      -       +      -
    171A  LEU*     2.9    21.1    +      -       +      +
    174A  VAL*     1.3    78.9    -      -       -      +
    176A  GLU*     1.3    55.4    +      -       -      +
    178A  MET*     3.0     7.6    +      -       -      +
    179A  ALA*     2.9    25.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 176 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37A  ARG      4.4     2.4    -      -       -      +
     38A  ILE*     3.6     9.3    -      -       +      -
     39A  HIS*     2.8    65.6    +      -       +      +
     40A  ALA*     4.5     0.2    -      -       -      -
    172A  ALA*     2.9    28.1    +      -       -      +
    173A  THR*     4.1     4.8    -      -       -      +
    175A  ALA*     1.3    75.7    -      -       -      +
    177A  ALA*     1.3    61.4    +      -       -      +
    179A  ALA*     3.1     3.0    +      -       -      +
    180A  ARG*     3.1    26.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 177 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173A  THR*     3.2    18.6    +      -       +      +
    174A  VAL*     3.9     5.6    -      -       -      +
    176A  GLU*     1.3    75.4    -      -       -      +
    178A  MET*     1.3    60.2    +      -       -      +
    180A  ARG*     3.6     7.9    -      -       -      +
    181A  ASN*     3.3    19.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 178 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44A  LEU*     3.5    34.4    -      -       +      +
     47A  SER*     4.4     4.5    -      -       -      +
     48A  ILE*     3.9    35.4    -      -       +      -
    174A  VAL*     3.2    20.6    +      -       -      +
    175A  ALA      3.0    10.3    +      -       -      +
    177A  ALA*     1.3    76.8    -      -       -      +
    179A  ALA*     1.3    63.6    +      -       -      +
    181A  ASN*     3.3    25.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 179 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39A  HIS      4.2     5.4    -      -       -      +
     40A  ALA*     3.8    25.6    -      -       +      -
     41A  PRO*     4.2     6.3    -      -       +      -
     44A  LEU*     3.6     9.1    -      -       +      +
    175A  ALA      2.9    12.0    +      -       -      +
    176A  GLU      3.1     8.5    +      -       -      +
    178A  MET*     1.3    74.8    -      -       -      +
    180A  ARG*     1.3    52.1    +      -       -      +
    181A  ASN*     2.5    21.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 180 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    176A  GLU      3.1    12.8    +      -       -      +
    177A  ALA*     3.6     6.8    -      -       -      +
    179A  ALA*     1.3    75.1    -      -       +      +
    181A  ASN*     1.3    63.2    +      -       -      +
----------------------------------------------------------
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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