Contacts of the helix formed by residues 129 - 153 (chain P) in PDB entry 1OCR


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 VAL 129 (chain P).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128P  GLU*     1.3    79.7    -      -       +      +
    130P  PRO*     1.4    68.7    -      -       +      +
    132P  LEU*     2.8    18.4    +      -       +      +
    133P  ASN*     2.8    27.3    +      -       -      +
    176P  LEU*     4.5    20.9    -      -       +      +
    179P  SER*     5.9     1.3    -      -       -      +
    180P  GLU*     3.5    40.2    -      -       +      +
     35T  SER*     3.5    15.0    +      -       -      +
     39T  SER*     4.2    16.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 130 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124P  LEU*     4.7     5.2    -      -       +      -
    125P  ASN      3.3    21.5    -      -       -      +
    126P  PRO*     3.7     6.5    -      -       +      +
    128P  GLU*     3.5     1.1    -      -       +      -
    129P  VAL*     1.4    91.7    -      -       +      +
    131P  LEU*     1.3    58.4    +      -       -      +
    133P  ASN*     3.6    11.2    +      -       +      +
    134P  THR*     2.8    28.1    +      -       -      -
    180P  GLU*     4.0    12.3    -      -       +      +
    249P  TRP*     3.9     3.1    -      -       +      -
    253P  TYR*     3.5    21.9    -      -       +      -
    257P  TYR*     3.6    37.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 131 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126P  PRO      3.3    11.4    +      -       -      +
    127P  LEU*     3.9    26.2    -      -       +      +
    128P  GLU      2.8    14.1    +      -       -      +
    130P  PRO*     1.3    70.8    -      -       -      +
    132P  LEU*     1.3    66.9    +      -       -      +
    134P  THR*     3.1    13.7    +      -       +      -
    135P  SER*     3.0    21.3    +      -       -      +
    253P  TYR*     3.8    20.9    -      -       +      +
     31T  CYS*     4.0    24.0    -      -       +      -
     34T  ASN*     4.4     9.9    -      -       -      +
     35T  SER*     5.3     0.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 132 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128P  GLU      3.2     1.4    +      -       -      -
    129P  VAL*     2.8    13.8    +      -       +      +
    131P  LEU*     1.3    80.2    -      -       -      +
    133P  ASN*     1.3    63.0    +      -       -      +
    135P  SER*     2.9    17.6    +      -       -      +
    136P  VAL*     2.8    37.2    +      -       +      +
    172P  TYR*     3.9    12.1    -      -       +      +
    176P  LEU*     3.6    31.9    -      -       +      -
     28T  VAL*     4.3     2.2    -      -       +      +
     31T  CYS*     3.9    18.3    -      -       +      +
     32T  THR*     3.8    21.1    -      -       +      +
     35T  SER*     3.7    28.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 133 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129P  VAL*     2.8    26.0    +      -       -      +
    130P  PRO*     3.8     6.3    -      -       -      +
    132P  LEU*     1.3    72.5    -      -       -      +
    134P  THR*     1.3    63.0    +      -       -      +
    136P  VAL*     3.3     5.6    +      -       -      +
    137P  LEU*     3.1    25.5    +      -       -      +
    173P  PHE*     3.6    31.1    -      -       +      -
    176P  LEU*     3.2    30.6    -      -       -      +
    177P  GLN*     3.5    32.7    +      -       -      +
    180P  GLU*     5.2     0.4    -      -       -      +
    249P  TRP*     3.7    18.6    +      -       +      -
----------------------------------------------------------
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Residues in contact with THR 134 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130P  PRO      2.8    14.1    +      -       -      -
    131P  LEU*     3.1    18.7    +      -       +      -
    133P  ASN*     1.3    80.9    -      -       -      +
    135P  SER*     1.3    62.4    +      -       -      +
    137P  LEU*     4.0     1.6    -      -       -      +
    138P  LEU*     3.1    34.2    +      -       +      +
    249P  TRP*     2.9    21.4    +      -       +      +
    250P  LEU*     4.1    25.8    -      -       +      -
    253P  TYR*     3.5    21.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 135 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131P  LEU*     3.0    10.8    +      -       -      -
    132P  LEU*     2.9    16.2    +      -       -      +
    134P  THR*     1.3    76.7    -      -       -      +
    136P  VAL*     1.3    61.7    +      -       -      +
    138P  LEU*     4.2     8.1    -      -       -      +
    139P  ALA*     3.0    25.8    +      -       -      +
     27T  SER*     4.5    12.0    -      -       -      -
     28T  VAL*     3.7    17.0    -      -       -      +
     31T  CYS*     3.7    30.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 136 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132P  LEU*     2.8    28.0    +      -       +      +
    133P  ASN*     3.7     9.2    -      -       -      +
    135P  SER*     1.3    78.3    +      -       -      +
    137P  LEU*     1.3    64.3    +      -       +      +
    139P  ALA*     3.4     3.0    +      -       -      +
    140P  SER*     3.1    20.1    +      -       -      -
    169P  LEU*     3.1    41.4    -      -       +      +
    172P  TYR*     3.5    33.4    -      -       +      -
    173P  PHE*     4.1    12.1    -      -       +      -
    176P  LEU*     4.3     5.4    -      -       +      -
     28T  VAL*     4.1    13.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 137 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133P  ASN      3.1     9.0    +      -       -      +
    134P  THR      4.0     2.7    -      -       -      +
    136P  VAL*     1.3    79.7    -      -       +      +
    138P  LEU*     1.3    66.6    +      -       -      +
    140P  SER*     2.6    22.3    +      -       -      +
    141P  GLY      3.1     4.7    +      -       -      -
    170P  GLY*     4.9     2.0    -      -       -      -
    173P  PHE*     3.5    54.1    -      -       +      -
    204P  HIS*     4.1     9.9    -      -       +      +
    208P  VAL*     5.1     2.5    -      -       +      -
    242P  TRP*     4.5    22.4    -      -       +      -
    245P  VAL*     4.5     9.6    -      -       +      +
    246P  ASP*     3.7    22.3    -      -       -      +
    249P  TRP*     3.7    28.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 138 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134P  THR*     3.1    38.0    +      -       +      +
    135P  SER*     4.2     5.6    -      -       -      +
    137P  LEU*     1.3    77.8    -      -       -      +
    139P  ALA*     1.3    58.8    +      -       -      +
    141P  GLY*     2.9    15.4    +      -       -      -
    142P  VAL*     3.2    16.4    +      -       -      +
    246P  ASP*     4.0    21.5    -      -       -      +
    250P  LEU*     4.2    22.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 139 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135P  SER      3.0    20.7    +      -       -      +
    136P  VAL      3.5     5.6    -      -       -      +
    138P  LEU*     1.3    76.4    -      -       -      +
    140P  SER*     1.3    57.4    +      -       -      +
    142P  VAL*     3.2     6.4    +      -       -      +
    143P  SER*     3.0    25.3    +      -       -      -
    169P  LEU*     3.9    11.9    -      -       +      +
     20T  THR*     5.6     0.5    -      -       -      +
     24T  ALA*     3.9    28.3    -      -       +      +
     25T  LEU*     4.9     1.6    -      -       +      +
     27T  SER*     6.3     0.2    -      -       -      -
     28T  VAL*     3.8    19.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 140 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136P  VAL      3.1    11.2    +      -       -      -
    137P  LEU*     2.6    23.4    +      -       -      -
    139P  ALA*     1.3    74.4    -      -       -      +
    141P  GLY*     1.3    64.7    +      -       -      +
    143P  SER*     3.4    10.6    +      -       -      -
    144P  ILE*     3.2    24.9    +      -       -      +
    166P  THR*     3.9    11.9    -      -       -      +
    169P  LEU*     3.7    21.0    -      -       -      +
    242P  TRP*     2.9    31.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 141 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137P  LEU      3.1     7.5    +      -       -      -
    138P  LEU      2.9    10.4    +      -       -      -
    140P  SER*     1.3    78.8    -      -       -      +
    142P  VAL*     1.3    59.3    +      -       -      +
    144P  ILE*     3.3     9.9    -      -       -      +
    145P  THR*     2.9    22.3    +      -       -      -
    242P  TRP*     4.8     2.5    -      -       -      -
    243P  HIS*     3.6    19.4    +      -       -      -
    246P  ASP*     4.0    11.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 142 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    138P  LEU      3.2    11.2    +      -       -      +
    139P  ALA*     3.2     8.7    +      -       -      +
    140P  SER      3.2     0.2    -      -       -      -
    141P  GLY*     1.3    75.6    -      -       -      +
    143P  SER*     1.3    65.0    +      -       -      +
    145P  THR*     3.0    16.1    +      -       -      -
    146P  TRP*     3.2     9.9    +      -       -      +
     16T  TRP*     4.0    26.4    -      -       +      +
     19T  LEU*     4.1     8.7    -      -       +      -
     20T  THR*     3.4    36.0    +      -       -      +
     23T  LEU*     6.1     4.7    -      -       +      -
     24T  ALA*     4.2    11.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 143 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    139P  ALA      3.0     8.9    +      -       -      -
    140P  SER*     3.4    16.8    -      -       -      -
    142P  VAL*     1.3    76.4    -      -       -      +
    144P  ILE*     1.3    63.5    +      -       -      +
    146P  TRP*     3.0     8.0    +      -       -      +
    147P  ALA      2.9    17.7    +      -       -      -
    162P  ALA*     3.6    10.6    -      -       -      +
    165P  ILE*     3.9    23.3    -      -       -      +
    166P  THR*     2.7    26.9    +      -       -      -
    169P  LEU*     4.3     0.2    -      -       -      +
     20T  THR*     3.6    20.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 144 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140P  SER      3.2    17.8    +      -       -      +
    141P  GLY*     3.3    15.3    -      -       -      +
    143P  SER*     1.3    77.5    +      -       -      +
    145P  THR*     1.3    60.8    +      -       -      +
    147P  ALA*     3.2     5.2    +      -       +      +
    148P  HIS*     2.9    27.4    +      -       -      +
    163P  LEU*     5.4     2.0    -      -       +      -
    166P  THR*     3.6    14.4    -      -       +      +
    215P  LEU*     3.6    30.7    -      -       +      -
    235P  PHE*     4.2    16.8    -      -       +      -
    239P  ALA*     3.8    25.8    -      -       +      -
    242P  TRP*     4.1    15.9    -      -       +      -
    243P  HIS*     3.8    22.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 145 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141P  GLY      2.9    14.7    +      -       -      -
    142P  VAL      3.0    10.6    +      -       -      -
    144P  ILE*     1.3    77.9    -      -       -      +
    146P  TRP*     1.3    63.4    +      -       -      +
    148P  HIS*     3.3     7.9    +      -       +      +
    149P  HIS*     2.9    42.5    +      -       +      +
    243P  HIS*     4.1    13.0    +      -       -      -
     16T  TRP*     3.5    41.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 146 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142P  VAL      3.2     4.8    +      -       -      +
    143P  SER*     3.0     7.0    +      -       -      +
    145P  THR*     1.3    76.0    -      -       -      +
    147P  ALA*     1.3    63.5    +      -       -      +
    149P  HIS*     3.2     3.1    +      -       -      +
    150P  SER*     2.9    36.3    +      -       -      -
    158P  HIS*     4.0    24.9    +      +       +      +
    161P  GLN*     3.6    33.0    -      -       +      -
    162P  ALA*     3.4    26.9    -      -       +      -
    165P  ILE*     3.9     9.6    -      -       +      -
     13T  ALA*     3.5    22.6    +      -       +      +
     16T  TRP*     3.6    24.6    -      -       +      +
     17T  ARG*     3.0    34.0    -      -       +      +
     20T  THR*     3.6    24.5    -      -       +      +
     21T  PHE*     3.6    20.2    -      +       -      -
----------------------------------------------------------
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Residues in contact with ALA 147 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    143P  SER      2.9     8.9    +      -       -      +
    144P  ILE*     3.2    13.9    -      -       +      +
    146P  TRP*     1.3    75.6    -      -       -      +
    148P  HIS*     1.3    64.4    +      -       -      +
    150P  SER*     3.1     4.0    +      -       -      -
    151P  LEU*     2.9    18.4    +      -       -      +
    159P  MET*     3.5    20.2    -      -       +      +
    162P  ALA*     3.5    21.5    -      -       +      +
    163P  LEU*     4.0    15.0    -      -       +      +
    235P  PHE*     3.9    15.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 148 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144P  ILE      2.9    12.7    +      -       -      +
    145P  THR*     3.5    12.3    -      -       +      +
    147P  ALA*     1.3    76.9    -      -       -      +
    149P  HIS*     1.3    64.9    +      +       -      +
    151P  LEU*     3.2     6.3    +      -       -      +
    152P  MET*     3.0    56.1    +      -       +      +
    232P  HIS*     3.6    27.4    +      +       -      -
    235P  PHE*     3.4    26.6    -      +       +      -
    236P  GLU*     4.1    25.4    +      -       +      +
    239P  ALA*     6.0     4.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 149 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145P  THR*     2.9    33.5    +      -       +      +
    146P  TRP*     3.7     5.6    -      -       -      +
    148P  HIS*     1.3    84.4    -      +       -      +
    150P  SER*     1.3    67.6    +      -       -      +
    151P  LEU      3.0     1.6    -      -       -      -
    152P  MET*     3.3    15.3    +      -       +      +
    153P  GLU*     3.0    34.0    +      -       +      +
     11T  THR*     4.9     5.8    -      -       -      +
     12T  GLY      4.3    18.3    +      -       -      -
     13T  ALA*     3.7    22.4    -      -       +      +
     16T  TRP*     3.8    26.4    +      +       -      -
----------------------------------------------------------
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Residues in contact with SER 150 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    146P  TRP*     2.9    37.9    +      -       -      -
    147P  ALA      3.5     7.6    -      -       -      -
    149P  HIS*     1.3    74.9    -      -       -      +
    151P  LEU*     1.3    63.0    +      -       -      +
    153P  GLU*     3.1     4.4    +      -       -      -
    154P  GLY      3.0     4.5    +      -       -      -
    155P  ASP*     2.8    37.1    +      -       -      +
    158P  HIS*     3.5     9.1    +      -       -      +
    159P  MET*     3.5    25.1    -      -       -      -
     13T  ALA*     3.9     9.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 151 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    147P  ALA      2.9    12.6    +      -       -      +
    148P  HIS*     3.3    10.1    -      -       -      +
    150P  SER*     1.3    77.3    -      -       -      +
    152P  MET*     1.3    57.9    +      -       -      +
    154P  GLY*     2.9    20.1    +      -       -      -
    155P  ASP      4.7     1.3    -      -       -      +
    159P  MET*     3.7    30.2    -      -       +      +
    222P  GLN*     4.0    25.8    -      -       -      +
    227P  PHE*     4.1    11.2    -      -       +      -
    228P  THR      4.6     2.5    -      -       -      +
    229P  SER*     3.7     8.8    -      -       -      -
    232P  HIS*     3.5    44.6    -      -       +      +
    235P  PHE*     4.2    13.9    -      -       +      -
      6S  VAL*     3.9    14.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 152 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    148P  HIS*     3.0    51.7    +      -       +      +
    149P  HIS*     3.3    17.5    +      -       +      +
    151P  LEU*     1.3    75.2    -      -       -      +
    153P  GLU*     1.3    61.9    +      -       +      +
    154P  GLY      3.2     1.2    +      -       -      -
    229P  SER*     3.7    23.7    -      -       -      +
    230P  ASN*     5.4     1.7    +      -       -      -
    232P  HIS*     4.3    15.9    -      -       +      +
    236P  GLU*     6.2     1.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 153 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149P  HIS*     3.0    24.2    +      -       +      +
    150P  SER*     3.7     4.0    -      -       -      +
    152P  MET*     1.3    81.1    -      -       +      +
    154P  GLY*     1.3    62.0    +      -       -      +
    155P  ASP*     3.4     5.9    +      -       +      +
    229P  SER*     5.1     0.7    -      -       -      -
      4S  GLY*     5.4     1.4    -      -       -      -
     12T  GLY*     4.1     5.7    -      -       -      -
     13T  ALA*     3.2    35.1    +      -       -      +
     14T  ARG      5.2     0.5    +      -       -      -
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il