Contacts of the helix formed by residues 138 - 165 (chain A) in PDB entry 3BQY


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 GLY 138 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136A  GLY      3.7     2.8    +      -       -      -
    137A  PHE*     1.3    76.0    -      -       -      +
    139A  ASP*     1.3    67.4    +      -       -      -
    140A  GLY      3.3     2.9    -      -       -      -
    141A  ASP*     3.3    13.1    +      -       -      +
    142A  ALA*     2.9    21.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 139 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129A  VAL*     5.5     0.9    -      -       -      +
    133A  ARG*     2.7    47.5    +      -       -      +
    138A  GLY*     1.3    71.1    -      -       -      +
    140A  GLY*     1.3    57.9    +      -       -      +
    142A  ALA*     3.9     3.2    -      -       -      +
    143A  ALA*     3.0    32.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 140 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    138A  GLY      3.3     0.8    -      -       -      -
    139A  ASP*     1.3    78.2    -      -       -      +
    141A  ASP*     1.3    56.7    +      -       -      +
    143A  ALA*     4.1     3.3    -      -       -      +
    144A  ARG*     2.9    59.8    +      -       -      +
    303A  PO4      5.4     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 141 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137A  PHE*     4.2    21.3    -      -       +      -
    138A  GLY*     3.3    14.2    +      -       -      +
    140A  GLY*     1.3    74.2    -      -       -      +
    142A  ALA*     1.3    58.5    +      -       -      +
    144A  ARG*     2.8    25.7    +      -       -      +
    145A  ALA*     2.8    32.6    +      -       -      +
    216A  LEU*     4.8     3.3    -      -       +      +
    219A  VAL*     4.1    30.3    -      -       +      +
    220A  ARG*     5.4     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 142 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129A  VAL*     3.9    13.5    -      -       +      +
    132A  LEU*     3.8    31.0    -      -       +      +
    133A  ARG*     3.6    28.9    -      -       +      +
    137A  PHE*     4.3     3.3    -      -       +      +
    138A  GLY      2.9    17.1    +      -       -      +
    139A  ASP      3.9     2.2    -      -       -      +
    141A  ASP*     1.3    77.7    -      -       -      +
    143A  ALA*     1.3    62.6    +      -       -      +
    145A  ALA*     3.4     3.1    +      -       -      +
    146A  LEU*     3.1    21.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 143 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129A  VAL*     4.3    16.5    -      -       +      +
    139A  ASP      3.0    17.9    +      -       -      +
    140A  GLY*     4.1     3.6    -      -       -      +
    142A  ALA*     1.3    74.2    -      -       -      +
    144A  ARG*     1.3    67.9    +      -       +      +
    146A  LEU*     3.2    18.5    +      -       +      +
    147A  TYR*     3.4    19.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 144 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140A  GLY*     2.9    39.0    +      -       -      +
    141A  ASP*     2.8    31.1    +      -       -      +
    143A  ALA*     1.3    76.8    -      -       +      +
    145A  ALA*     1.3    57.9    +      -       -      +
    147A  TYR*     3.2    11.3    +      -       +      +
    148A  SER*     3.0    31.4    +      -       -      +
    303A  PO4      2.7    49.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 145 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128A  LEU*     4.7     0.9    -      -       -      -
    132A  LEU*     3.4    27.6    -      -       +      -
    141A  ASP      2.8    19.7    +      -       -      +
    142A  ALA      3.6     0.4    -      -       -      +
    143A  ALA      3.2     0.2    -      -       -      -
    144A  ARG*     1.3    74.1    -      -       -      +
    146A  LEU*     1.3    65.0    +      -       -      +
    148A  SER*     3.7     8.0    -      -       -      -
    149A  VAL*     2.8    31.2    +      -       +      +
    216A  LEU*     3.8    26.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 146 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124A  PHE*     4.2    17.9    -      -       +      -
    125A  ALA*     3.8    40.8    -      -       +      +
    128A  LEU*     3.9    19.7    -      -       +      +
    129A  VAL*     3.7    30.7    -      -       +      -
    142A  ALA      3.1     6.2    +      -       -      +
    143A  ALA*     3.2    12.5    +      -       +      +
    145A  ALA*     1.3    76.5    -      -       -      +
    147A  TYR*     1.3    74.4    +      -       +      +
    149A  VAL*     4.0     1.0    -      -       -      +
    150A  ALA*     2.9    37.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 147 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    143A  ALA*     3.4    25.3    +      -       +      -
    144A  ARG*     3.2    11.2    +      -       +      +
    146A  LEU*     1.3    91.7    -      -       +      +
    148A  SER*     1.3    61.9    +      -       -      +
    150A  ALA*     4.7     3.8    -      -       +      -
    151A  ASN*     2.8    54.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 148 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144A  ARG*     3.0    17.4    +      -       -      +
    145A  ALA*     3.7    10.1    -      -       -      -
    147A  TYR*     1.3    76.5    -      -       -      +
    149A  VAL*     1.3    58.3    +      -       -      +
    151A  ASN*     4.3     2.2    -      -       -      +
    152A  PHE*     2.9    32.7    +      -       -      +
    212A  LEU*     4.0    19.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 149 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90A  THR*     4.5    18.4    -      -       +      -
     94A  ALA*     3.7    29.6    -      -       +      -
    124A  PHE*     5.6     1.1    -      -       +      -
    128A  LEU*     4.0    21.3    -      -       +      -
    145A  ALA*     2.8    21.3    +      -       +      +
    146A  LEU      4.0     1.8    -      -       -      +
    148A  SER*     1.3    76.0    -      -       -      +
    150A  ALA*     1.3    59.4    +      -       -      +
    152A  PHE*     3.8     1.6    -      -       -      +
    153A  THR*     2.7    39.1    +      -       -      +
    209A  LEU*     4.6     9.4    -      -       +      -
    212A  LEU*     4.0    24.0    -      -       +      -
    213A  LEU*     5.7     0.7    -      -       +      -
    216A  LEU*     4.9    10.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 150 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97A  LEU*     4.6     8.3    -      -       +      -
    111A  PHE*     6.2     1.8    -      -       +      -
    124A  PHE*     4.6    20.2    -      -       +      -
    128A  LEU*     5.4     0.4    -      -       -      +
    146A  LEU*     2.9    24.1    +      -       +      +
    147A  TYR*     4.2     4.3    -      -       +      +
    149A  VAL*     1.3    79.8    -      -       -      +
    151A  ASN*     1.3    61.2    +      -       -      +
    153A  THR*     3.3     5.6    +      -       -      -
    154A  VAL*     2.9    37.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 151 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    147A  TYR*     2.8    47.8    +      -       -      +
    148A  SER*     4.3     1.8    -      -       -      +
    150A  ALA*     1.3    72.8    -      -       -      +
    152A  PHE*     1.3    59.9    +      -       -      +
    154A  VAL*     4.1     6.0    -      -       -      +
    155A  GLY*     2.9    27.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 152 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    148A  SER      2.9    20.0    +      -       -      +
    149A  VAL      3.8     0.7    -      -       -      +
    151A  ASN*     1.3    78.6    -      -       -      +
    153A  THR*     1.3    64.0    +      -       -      +
    155A  GLY*     5.1     0.7    -      -       -      -
    156A  HIS*     2.8    44.0    +      +       +      +
    204A  HIS      4.6     1.6    -      -       -      -
    205A  PHE*     3.6    39.9    -      +       -      -
    208A  GLY*     3.7    22.2    -      -       -      -
    209A  LEU*     3.8    18.8    -      -       +      -
    212A  LEU*     3.7    24.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 153 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94A  ALA*     3.7    34.3    -      -       -      +
     97A  LEU*     3.9    17.9    -      -       +      -
     98A  ARG*     3.8    25.1    -      -       +      +
    101A  LEU*     5.4     1.1    -      -       +      -
    149A  VAL*     2.7    24.0    +      -       -      +
    150A  ALA      3.3     3.8    +      -       -      -
    152A  PHE*     1.3    82.8    -      -       -      +
    154A  VAL*     1.3    56.0    +      -       -      +
    156A  HIS*     3.7     1.4    -      -       -      +
    157A  THR*     2.7    37.0    +      -       -      +
    205A  PHE*     3.8    16.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 154 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97A  LEU*     4.6     4.9    -      -       +      -
    101A  LEU*     4.5     8.7    -      -       +      -
    108A  ALA*     4.3     4.8    -      -       +      +
    111A  PHE*     3.8    31.6    -      -       +      -
    112A  ALA*     3.8    29.4    -      -       +      -
    150A  ALA*     2.9    23.4    +      -       +      +
    151A  ASN*     4.1     7.0    -      -       -      +
    153A  THR*     1.3    73.7    -      -       -      +
    155A  GLY*     1.3    61.4    +      -       -      +
    157A  THR*     3.2     4.1    +      -       -      -
    158A  LEU*     2.8    41.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 155 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151A  ASN      2.9    18.0    +      -       -      -
    152A  PHE*     3.8     0.7    -      -       -      -
    154A  VAL*     1.3    75.8    -      -       -      +
    156A  HIS*     1.3    62.8    +      -       -      +
    158A  LEU*     3.7    10.9    -      -       -      +
    159A  GLU*     3.1    31.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 156 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98A  ARG*     3.3    21.6    +      -       -      -
    152A  PHE*     2.8    40.4    +      -       +      +
    153A  THR      3.7     3.1    -      -       -      +
    155A  GLY*     1.3    74.1    -      -       -      +
    157A  THR*     1.3    66.2    +      -       -      +
    159A  GLU*     3.3     5.2    +      -       -      +
    160A  GLU*     2.8    47.9    +      -       +      +
    201A  PHE*     3.4    29.4    +      +       +      -
    204A  HIS*     4.3     9.0    -      -       +      +
    205A  PHE*     3.6    29.0    +      +       +      +
----------------------------------------------------------
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Residues in contact with THR 157 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98A  ARG*     3.6    24.5    -      -       +      +
    101A  LEU*     3.9    29.8    -      -       +      -
    102A  LEU*     3.6    29.6    -      -       +      -
    108A  ALA*     3.9    10.3    -      -       +      -
    153A  THR*     2.7    23.3    +      -       -      +
    154A  VAL      4.0     1.8    -      -       -      -
    156A  HIS*     1.3    79.3    -      -       -      +
    158A  LEU*     1.3    60.8    +      -       -      +
    160A  GLU*     3.7     3.1    -      -       -      +
    161A  GLN*     2.8    33.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 158 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108A  ALA*     3.6    10.4    -      -       +      +
    109A  ARG*     3.5    48.8    -      -       +      +
    112A  ALA*     4.4     7.6    -      -       +      -
    154A  VAL*     2.8    37.2    +      -       +      +
    155A  GLY*     3.7     9.9    -      -       -      +
    157A  THR*     1.3    77.1    -      -       -      +
    159A  GLU*     1.3    64.2    +      -       +      +
    161A  GLN*     3.4     3.1    +      -       -      +
    162A  ALA*     2.9    28.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 159 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    155A  GLY*     3.1    19.6    +      -       -      +
    156A  HIS*     3.9     3.6    -      -       -      +
    158A  LEU*     1.3    78.1    -      -       +      +
    160A  GLU*     1.3    64.7    +      -       -      +
    162A  ALA*     3.4     8.4    +      -       -      +
    163A  ALA*     3.2    23.2    +      -       -      +
    169A  GLY      4.7     1.4    -      -       -      +
    170A  GLY*     3.6    20.4    -      -       -      -
    171A  PRO*     3.3    29.2    -      -       -      +
    201A  PHE*     5.0     1.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 160 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98A  ARG*     2.9    32.0    +      -       -      -
    102A  LEU*     3.7    21.3    -      -       +      +
    156A  HIS*     2.8    32.2    +      -       +      +
    157A  THR*     3.7     5.6    -      -       -      +
    159A  GLU*     1.3    75.9    -      -       -      +
    161A  GLN*     1.3    62.3    +      -       -      +
    163A  ALA*     3.2     5.2    +      -       -      +
    164A  LEU*     3.2    37.8    +      -       +      +
    201A  PHE*     3.3    45.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 161 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101A  LEU      3.0    13.6    +      -       -      -
    102A  LEU*     3.5    28.5    +      -       +      +
    104A  HIS      2.9    27.5    +      -       -      -
    105A  ARG*     4.6     1.4    -      -       -      +
    106A  ASP*     3.9    16.2    -      -       -      +
    107A  GLY      3.4     5.1    +      -       -      -
    108A  ALA*     2.9    34.8    +      -       -      +
    109A  ARG*     4.6     1.0    +      -       +      -
    157A  THR*     2.8    16.5    +      -       -      +
    158A  LEU*     4.0     3.6    -      -       -      +
    160A  GLU*     1.3    73.8    -      -       +      +
    162A  ALA*     1.3    58.5    +      -       -      +
    164A  LEU*     3.2    10.7    +      -       +      +
    165A  THR*     2.7    34.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 162 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158A  LEU      2.9    18.0    +      -       -      +
    159A  GLU*     3.7    14.8    -      -       -      +
    161A  GLN*     1.3    76.0    -      -       -      +
    163A  ALA*     1.3    60.7    +      -       -      +
    165A  THR*     3.5    13.8    +      -       -      -
    168A  GLY      3.1    25.1    -      -       -      +
    169A  GLY*     3.7    20.4    -      -       -      +
    170A  GLY*     4.0     3.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 163 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    159A  GLU      3.2    13.3    +      -       -      +
    160A  GLU      3.5     9.6    -      -       -      +
    161A  GLN      3.2     0.2    -      -       -      -
    162A  ALA*     1.3    76.3    -      -       -      +
    164A  LEU*     1.3    61.7    +      -       -      +
    165A  THR      3.6     1.4    +      -       -      +
    168A  GLY*     3.6    13.3    +      -       -      -
    169A  GLY      3.7     2.4    +      -       -      +
    173A  ASP*     3.6    25.6    -      -       +      +
    174A  GLU*     4.0    15.5    -      -       +      +
    201A  PHE*     3.8    21.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 164 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    102A  LEU*     5.2     2.7    -      -       +      -
    160A  GLU*     3.2    43.1    +      -       +      +
    161A  GLN*     3.2    11.4    +      -       +      +
    163A  ALA*     1.3    77.1    -      -       -      +
    165A  THR*     1.3    64.4    +      -       -      +
    166A  PRO*     3.5     5.4    -      -       -      +
    174A  GLU*     5.3     2.0    -      -       -      +
    199A  THR*     6.4     1.6    -      -       +      -
    201A  PHE*     3.9    20.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 165 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105A  ARG*     5.1     9.2    -      -       -      +
    106A  ASP*     4.5    12.9    +      -       -      +
    161A  GLN      2.7    22.7    +      -       -      -
    162A  ALA*     3.5    15.1    +      -       -      -
    163A  ALA      3.3     1.3    -      -       -      +
    164A  LEU*     1.3    78.4    -      -       -      +
    166A  PRO*     1.4    74.8    -      -       +      +
    167A  GLY      3.0     0.5    +      -       -      -
    168A  GLY*     2.7    37.3    +      -       -      +
----------------------------------------------------------
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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