Contacts of the helix formed by residues 7 - 32 (chain C) in PDB entry 4NEF


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 ILE 7 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6C  SER*     1.3    77.3    -      -       -      +
      8C  ALA*     1.3    66.5    +      -       -      +
     10C  SER*     3.0    11.4    +      -       -      -
     11C  ARG*     3.0    66.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 8 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6C  SER      4.2     4.2    -      -       -      +
      7C  ILE*     1.3    78.9    -      -       -      +
      9C  PHE*     1.3    55.6    +      -       -      +
     11C  ARG*     3.4    14.0    +      -       -      +
     12C  ALA*     3.0    27.8    +      -       -      +
     62C  ILE      4.7     1.7    -      -       -      +
     85C  ARG*     5.8     1.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 9 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6C  SER*     4.0    13.4    +      -       -      +
      7C  ILE      3.2     0.8    -      -       -      -
      8C  ALA*     1.3    74.5    -      -       -      +
     10C  SER*     1.4    64.6    +      -       -      +
     12C  ALA*     3.3     5.9    +      -       -      +
     13C  VAL*     3.0    43.9    +      -       +      +
     84C  LEU*     3.8    22.7    -      -       +      -
     85C  ARG*     3.7    55.9    -      -       +      +
     88C  PHE*     3.5    48.9    -      +       +      -
----------------------------------------------------------
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Residues in contact with SER 10 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6C  SER      3.0    16.5    +      -       -      -
      7C  ILE*     3.0    12.8    +      -       -      -
      9C  PHE*     1.4    80.0    -      -       -      +
     11C  ARG*     1.4    57.2    +      -       -      +
     13C  VAL*     3.4     5.5    +      -       -      +
     14C  PHE*     2.9    32.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 11 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    221B  TYR      5.0     2.0    +      -       -      -
    222B  VAL*     3.2    29.0    +      -       -      +
    223B  LEU*     3.2    16.9    -      -       -      +
    225B  PRO*     3.4    27.2    -      -       -      +
      7C  ILE*     3.0    58.4    +      -       +      +
      8C  ALA*     3.6    11.1    -      -       -      +
     10C  SER*     1.4    74.7    -      -       -      +
     12C  ALA*     1.3    57.1    +      -       -      +
     14C  PHE*     3.9     6.4    -      -       -      +
     15C  ALA      3.0    23.0    +      -       -      -
     62C  ILE*     3.2    25.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 12 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8C  ALA      3.0    12.8    +      -       -      +
      9C  PHE      3.5     8.3    -      -       -      +
     11C  ARG*     1.3    73.7    -      -       -      +
     13C  VAL*     1.4    58.0    +      -       -      +
     15C  ALA      3.4     0.2    +      -       -      -
     16C  GLU*     3.0    26.9    +      -       -      +
     62C  ILE      3.4    22.4    +      -       -      +
     63C  SER*     3.3    12.7    -      -       -      -
     85C  ARG*     3.6    13.7    -      -       -      +
     89C  TYR*     3.2    25.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 13 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9C  PHE*     3.0    53.2    +      -       +      +
     10C  SER*     3.9     5.4    -      -       -      +
     12C  ALA*     1.4    70.9    -      -       -      +
     14C  PHE*     1.4    60.5    +      -       -      +
     16C  GLU*     3.3     3.4    +      -       -      +
     17C  PHE*     3.0    24.7    +      -       +      +
     88C  PHE*     3.6    37.0    -      -       +      +
     89C  TYR*     4.1    11.9    -      -       +      -
     92C  ALA*     3.5    13.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 14 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    218B  LEU*     4.2    27.1    -      -       +      -
    222B  VAL*     4.0    26.2    -      -       +      -
    223B  LEU*     3.7    23.8    -      -       +      -
     10C  SER      2.9    18.3    +      -       -      +
     11C  ARG*     3.9     6.1    -      -       -      +
     12C  ALA      3.4     0.2    -      -       -      -
     13C  VAL*     1.4    76.6    -      -       -      +
     15C  ALA*     1.4    53.8    +      -       -      +
     17C  PHE*     3.2    27.1    +      +       -      +
     18C  LEU*     2.9    42.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 15 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    223B  LEU*     3.9    12.3    -      -       +      -
     11C  ARG      3.0    19.2    +      -       -      +
     12C  ALA      3.5     5.6    -      -       -      +
     14C  PHE*     1.4    73.6    -      -       -      +
     16C  GLU*     1.4    54.4    +      -       -      +
     18C  LEU*     3.4     3.5    +      -       -      -
     19C  ALA*     2.8    38.0    +      -       -      +
     59C  LEU*     3.8    12.1    -      -       +      +
     62C  ILE*     3.5    27.4    -      -       +      -
     63C  SER*     3.8    11.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 16 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12C  ALA      3.0    16.7    +      -       -      +
     13C  VAL*     3.3     9.4    +      -       -      +
     15C  ALA*     1.4    74.6    -      -       -      +
     17C  PHE*     1.4    58.4    +      -       -      +
     19C  ALA*     3.9     3.9    -      -       -      +
     20C  THR*     2.6    32.9    +      -       -      -
     63C  SER*     2.9    19.3    +      -       -      +
     65C  ALA*     3.3     4.7    +      -       -      -
     66C  HIS*     2.9    28.7    +      -       -      +
     67C  ILE*     3.0    18.1    +      -       -      -
     89C  TYR*     3.7    33.0    -      -       +      +
     92C  ALA*     4.2    12.8    -      -       +      -
     93C  GLN*     3.0    24.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 17 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     13C  VAL*     3.0    14.1    +      -       +      +
     14C  PHE*     3.4    31.9    -      +       -      +
     16C  GLU*     1.4    74.5    -      -       -      +
     18C  LEU*     1.4    63.6    +      -       +      +
     20C  THR      3.4     1.9    +      -       -      -
     21C  LEU*     3.0    50.9    +      -       +      +
     92C  ALA*     3.4    19.9    -      -       +      +
     95C  LEU*     3.9    16.8    -      -       +      -
     96C  GLY*     3.4    39.4    -      -       -      -
     99C  ALA*     4.4     5.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 18 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136B  PHE*     5.9     2.7    -      -       +      -
    139B  LEU*     4.6     7.6    -      -       +      -
    143B  LEU*     4.0    19.3    -      -       +      -
    218B  LEU*     3.8    32.1    -      -       +      -
    223B  LEU*     4.1    17.7    -      -       +      -
     14C  PHE*     2.9    31.0    +      -       +      +
     15C  ALA      3.9     2.2    -      -       -      +
     17C  PHE*     1.4    81.0    -      -       +      +
     19C  ALA*     1.4    59.8    +      -       -      +
     21C  LEU*     3.4    14.1    +      -       +      +
     22C  LEU*     3.0    50.9    +      -       +      +
     59C  LEU*     4.7     7.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 19 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15C  ALA      2.8    23.1    +      -       -      +
     16C  GLU*     3.9     6.3    -      -       -      +
     18C  LEU*     1.4    72.5    -      -       -      +
     20C  THR*     1.4    57.2    +      -       -      +
     22C  LEU      3.4     0.7    +      -       -      -
     23C  PHE*     2.9    30.3    +      -       -      +
     55C  LEU*     3.4    13.0    -      -       +      +
     59C  LEU*     3.6    21.9    -      -       +      +
     65C  ALA*     5.7     1.1    -      -       -      -
     67C  ILE*     3.6    30.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 20 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16C  GLU      2.6    23.8    +      -       -      -
     17C  PHE      4.1     1.6    -      -       -      -
     19C  ALA*     1.4    72.9    -      -       -      +
     21C  LEU*     1.4    59.9    +      -       -      +
     23C  PHE*     4.3     2.5    -      -       +      -
     24C  VAL*     3.0    39.7    +      -       +      +
     67C  ILE*     3.6    29.7    -      -       +      +
     93C  GLN*     3.4    43.3    -      -       -      +
     96C  GLY      4.0     2.9    -      -       -      -
     97C  ALA*     3.9    13.3    -      -       +      -
    184C  ASN*     5.1     0.2    -      -       -      +
    186C  ALA*     4.1     9.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 21 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136B  PHE*     4.1    18.4    -      -       +      -
     17C  PHE*     3.0    45.1    +      -       +      +
     18C  LEU*     3.4    17.0    -      -       +      +
     20C  THR*     1.4    76.5    -      -       -      +
     22C  LEU*     1.4    63.7    +      -       +      +
     25C  PHE*     3.0    34.1    +      -       +      +
     96C  GLY      3.1    17.1    +      -       -      +
     99C  ALA*     3.8    14.1    -      -       +      -
    100C  GLY*     3.5    13.9    -      -       -      +
    103C  LEU*     4.1    24.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 22 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136B  PHE*     3.8    33.7    -      -       +      +
    139B  LEU*     4.0    21.8    -      -       +      -
    140B  GLN*     4.5     8.7    -      -       +      -
    143B  LEU*     4.1    10.8    -      -       +      -
     18C  LEU*     3.0    37.8    +      -       +      +
     19C  ALA*     3.9     2.9    -      -       -      +
     21C  LEU*     1.4    75.7    -      -       +      +
     23C  PHE*     1.3    59.3    +      -       -      +
     25C  PHE*     4.3     5.2    -      -       +      -
     26C  PHE*     3.0    55.2    +      -       +      +
     55C  LEU*     3.9    26.9    -      -       +      -
     59C  LEU*     5.5     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 23 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19C  ALA      2.9    18.7    +      -       -      +
     20C  THR*     3.9     2.9    -      -       +      +
     22C  LEU*     1.3    75.0    -      -       -      +
     24C  VAL*     1.3    64.1    +      -       +      +
     26C  PHE*     4.0     2.7    -      -       -      +
     27C  GLY*     2.8    34.6    +      -       -      -
     48C  PHE*     3.6    45.3    -      +       +      -
     51C  GLY*     4.6     5.6    -      -       -      -
     52C  ILE*     3.5    38.1    -      -       +      -
     55C  LEU*     3.7    10.9    -      -       +      +
     67C  ILE*     3.7    20.2    -      -       +      -
    168C  VAL*     5.0     4.0    -      -       +      -
    172C  HIS*     5.5     1.1    -      -       -      -
    182C  SER      6.0     0.9    -      -       -      -
    184C  ASN*     3.4    27.4    -      -       +      -
    187C  ARG*     4.1    17.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 24 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20C  THR*     3.0    22.4    +      -       +      +
     21C  LEU      4.2     1.1    -      -       -      +
     23C  PHE*     1.3    83.6    -      -       +      +
     25C  PHE*     1.4    63.7    +      -       -      +
     27C  GLY*     5.1     0.2    -      -       -      -
     28C  LEU*     3.0    55.8    +      -       +      +
     48C  PHE*     6.0     0.9    -      -       -      -
     97C  ALA*     3.3    41.3    -      -       +      +
    101C  ALA      3.8     9.0    -      -       -      +
    104C  LEU*     4.8     0.2    -      -       -      +
    187C  ARG*     4.0    23.8    -      -       +      -
    190C  ALA*     3.8     7.0    -      -       +      -
    191C  PRO*     5.4     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 25 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132B  THR      5.1     0.4    -      -       -      -
    133B  VAL*     4.6    10.8    -      -       -      -
    136B  PHE*     3.6    34.8    -      +       +      -
    174B  LEU*     3.7    21.9    -      -       +      +
     21C  LEU*     3.0    24.7    +      -       +      +
     22C  LEU*     3.8     4.0    -      -       -      +
     24C  VAL*     1.4    79.0    -      -       -      +
     26C  PHE*     1.4    77.7    +      +       -      +
     29C  GLY*     3.4    18.0    +      -       -      -
    100C  GLY*     3.7    23.5    +      -       -      +
    103C  LEU*     3.8    19.3    -      -       +      -
    104C  LEU*     3.7    23.8    -      -       +      +
    107C  ILE*     3.7    39.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 26 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136B  PHE      3.6    18.4    -      -       -      -
    137B  LEU*     3.5    32.1    -      -       +      -
    140B  GLN*     3.5    28.0    -      -       +      -
    170B  LEU*     3.8    38.4    -      -       +      -
    171B  GLY*     3.9    14.8    -      -       -      -
    174B  LEU*     3.7    16.1    -      -       +      +
     22C  LEU*     3.0    38.2    +      -       +      +
     23C  PHE*     4.2     2.0    -      -       -      +
     25C  PHE*     1.4    91.4    -      +       -      +
     27C  GLY*     1.3    63.1    +      -       -      +
     29C  GLY      3.7     0.3    +      -       -      -
     30C  SER*     2.7    32.8    +      -       -      -
     47C  ALA*     4.8     1.7    -      -       -      +
     51C  GLY*     5.8     2.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 27 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23C  PHE      2.8    22.9    +      -       -      -
     26C  PHE*     1.3    71.7    -      -       -      +
     28C  LEU*     1.3    62.2    -      -       -      +
     30C  SER*     3.5     4.0    +      -       -      -
     31C  ALA      3.3    12.5    +      -       -      -
     47C  ALA*     5.1     2.0    +      -       -      -
     48C  PHE*     3.3    49.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 28 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24C  VAL*     3.0    41.2    +      -       +      +
     27C  GLY*     1.3    72.0    -      -       -      +
     29C  GLY*     1.3    57.0    +      -       -      +
     31C  ALA*     2.9    19.0    +      -       -      +
     32C  LEU*     2.9    19.3    +      -       -      +
     48C  PHE*     4.3     2.5    -      -       +      -
    101C  ALA*     4.2     9.2    -      -       +      -
    104C  LEU*     3.7    14.8    -      -       +      -
    116C  LEU*     3.6    15.9    -      -       +      +
    117C  ALA*     3.6    17.7    -      -       +      +
    187C  ARG*     3.5    48.5    -      -       +      +
    191C  PRO*     3.8    18.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 29 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    174B  LEU*     3.5    26.3    -      -       -      +
    177B  HIS*     4.5     0.9    -      -       -      -
     25C  PHE      3.4     7.9    +      -       -      -
     27C  GLY      3.4     0.2    -      -       -      -
     28C  LEU*     1.3    78.3    -      -       -      +
     30C  SER*     1.3    57.3    +      -       -      +
     32C  LEU*     3.9     4.7    -      -       -      -
     33C  ASN*     3.3    32.2    +      -       -      +
    104C  LEU*     3.5    19.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 30 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    170B  LEU*     5.0     1.6    +      -       -      +
    173B  LEU*     3.3    34.6    +      -       -      +
    174B  LEU*     3.7     5.2    +      -       -      +
    177B  HIS*     4.8     4.0    +      -       -      -
     26C  PHE*     2.7    23.8    +      -       -      +
     27C  GLY      3.9     1.3    -      -       -      -
     28C  LEU      3.2     0.4    -      -       -      -
     29C  GLY*     1.3    74.2    -      -       -      +
     31C  ALA*     1.4    58.1    +      -       -      +
     32C  LEU      3.6     1.1    -      -       -      -
     33C  ASN      5.0     0.2    -      -       -      -
     39C  PRO*     3.5    25.2    -      -       -      +
     43C  GLN*     4.5     5.7    -      -       -      +
     44C  ILE*     4.1     5.2    -      -       -      +
     47C  ALA*     3.5    28.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 31 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27C  GLY      3.3    12.5    +      -       -      +
     28C  LEU      2.9     9.3    +      -       -      +
     30C  SER*     1.4    75.2    -      -       -      +
     32C  LEU*     1.3    64.2    +      -       -      +
     34C  TRP*     4.6    11.4    -      -       -      -
     39C  PRO*     4.3     4.7    -      -       -      +
     44C  ILE*     4.0    33.7    -      -       +      +
     48C  PHE*     4.2     5.4    -      -       +      -
    117C  ALA*     3.8    18.4    -      -       +      +
    187C  ARG*     5.4     1.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 32 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28C  LEU      2.9    22.0    +      -       -      +
     29C  GLY*     3.9     7.2    -      -       -      +
     31C  ALA*     1.3    82.0    -      -       -      +
     33C  ASN*     1.4    95.0    +      -       -      +
     34C  TRP*     3.2    37.0    -      -       +      +
     39C  PRO*     3.4     7.4    -      -       -      +
    104C  LEU*     3.8    11.2    -      -       +      -
    108C  THR*     3.8    25.4    -      -       +      +
    112C  ILE*     4.1     5.2    -      -       +      +
    113C  ARG      4.1    11.7    -      -       -      +
    115C  ASP*     5.5     0.2    -      -       -      -
    116C  LEU*     3.8    43.3    -      -       +      -
    117C  ALA*     4.5     6.0    -      -       -      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

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

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