Contacts of the helix formed by residues 110 - 134 (chain P) in PDB entry 3L73


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 TYR 110 (chain P).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107P  SER      2.8    15.9    +      -       -      +
    108P  TYR      3.8     2.5    -      -       -      -
    109P  LEU*     1.3    79.0    -      -       +      +
    111P  LYS*     1.3    64.7    +      -       -      +
    112P  GLU*     3.3     5.6    -      -       -      -
    113P  THR*     2.8    27.5    +      -       -      +
    114P  TRP      3.0     7.4    +      -       -      -
    201P  LEU*     4.4     6.1    -      -       +      -
    204P  SER*     3.4    33.4    +      -       -      +
    205P  GLY      3.3    23.2    +      -       -      -
    206P  SER      3.7     3.1    +      -       -      -
    207P  ASN*     3.7    24.0    +      -       +      -
    314P  ARG*     3.4    32.4    +      -       -      -
    502P  HEM      4.2    19.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 111 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108P  TYR      3.9     5.4    -      -       -      +
    109P  LEU*     3.1    21.9    +      -       -      +
    110P  TYR*     1.3    72.9    -      -       -      +
    112P  GLU*     1.3    65.9    +      -       +      +
    114P  TRP*     3.1     4.3    +      -       -      +
    115P  ASN*     2.8    41.9    +      -       -      +
    306P  PRO*     4.1    30.1    +      -       +      +
    307P  PHE*     3.6    37.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 112 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9C  HIS*     5.2     5.9    +      -       +      -
     10C  PRO*     4.9     6.6    -      -       -      +
    110P  TYR*     3.0     2.7    +      -       -      -
    111P  LYS*     1.3    78.2    +      -       +      +
    113P  THR*     1.3    68.5    +      -       -      +
    115P  ASN*     4.3     7.6    -      -       -      +
    116P  THR*     3.0    29.7    +      -       +      +
    200P  PHE*     3.2    49.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 113 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    110P  TYR*     2.8    22.2    +      -       -      +
    112P  GLU*     1.3    77.8    +      -       -      +
    114P  TRP*     1.3    61.8    +      -       -      +
    116P  THR*     2.9    19.3    +      -       -      -
    117P  GLY      3.0     0.3    +      -       -      -
    197P  HIS*     2.9    32.4    -      -       +      +
    200P  PHE*     3.6     8.3    +      -       -      +
    201P  LEU*     3.2    41.9    +      -       +      +
    204P  SER*     5.3     0.3    +      -       -      -
    502P  HEM      3.7    31.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 114 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99P  ILE*     4.3    14.1    -      -       +      -
    102P  GLY*     4.3    20.0    -      -       -      -
    103P  LEU*     4.6     9.2    -      -       +      -
    108P  TYR*     3.2    47.1    -      +       +      +
    110P  TYR      3.0    10.4    +      -       -      +
    111P  LYS*     3.2     9.6    -      -       -      +
    113P  THR*     1.3    77.8    -      -       -      +
    115P  ASN*     1.3    68.3    +      -       -      +
    117P  GLY*     3.0    16.3    +      -       -      -
    118P  VAL*     3.0    21.5    +      -       +      +
    302P  LEU*     2.7    52.3    +      -       +      -
    303P  PHE*     5.0     0.2    -      -       -      -
    305P  ILE*     4.4     9.6    -      -       +      -
    306P  PRO*     3.6    20.1    -      -       +      +
    502P  HEM      3.6    45.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 115 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111P  LYS*     2.8    38.4    +      -       -      +
    112P  GLU*     4.1     7.0    -      -       -      +
    114P  TRP*     1.3    75.7    -      -       -      +
    116P  THR*     1.3    68.7    +      -       +      +
    117P  GLY      3.0     1.6    -      -       -      -
    118P  VAL*     3.0    14.1    +      -       -      +
    119P  ILE*     3.0    17.3    +      -       +      +
    303P  PHE*     3.2    38.7    -      -       +      +
    306P  PRO*     5.3     1.8    -      -       -      +
    307P  PHE*     6.4     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with THR 116 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112P  GLU      3.0    16.6    +      -       -      +
    113P  THR*     2.9    10.2    +      -       -      -
    115P  ASN*     1.3    74.5    -      -       +      +
    117P  GLY*     1.3    57.5    +      -       -      +
    119P  ILE*     2.9    16.7    +      -       +      +
    120P  LEU*     2.8    28.7    +      -       -      +
    193P  ILE*     4.4    10.2    -      -       +      +
    196P  ILE*     4.0    13.5    -      -       +      -
    197P  HIS*     2.7    40.6    +      -       -      -
    200P  PHE*     3.8    27.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 117 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    113P  THR      3.0     2.0    +      -       -      -
    114P  TRP      3.0    10.3    +      -       -      -
    116P  THR*     1.3    83.9    +      -       -      +
    118P  VAL*     1.3    60.6    +      -       -      +
    120P  LEU*     3.1     4.6    +      -       -      +
    121P  LEU      3.1    10.6    +      -       -      -
    197P  HIS*     3.5    13.5    -      -       -      -
    502P  HEM      2.8    42.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 118 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114P  TRP*     3.0    28.6    +      -       -      +
    115P  ASN*     3.0     1.5    +      -       -      -
    117P  GLY*     1.3    74.9    -      -       -      +
    119P  ILE*     1.3    58.5    +      -       -      +
    121P  LEU*     3.2     7.6    +      -       +      +
    122P  LEU*     3.0    36.1    +      -       +      +
    299P  VAL*     4.7     5.8    -      -       +      +
    302P  LEU*     4.2    26.0    -      -       +      -
    303P  PHE*     3.4    51.1    -      -       +      -
    502P  HEM      3.7    15.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 119 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115P  ASN*     3.0    14.7    +      -       +      +
    116P  THR*     2.9    16.0    +      -       +      +
    118P  VAL*     1.3    74.5    -      -       -      +
    120P  LEU*     1.3    65.1    +      -       -      +
    122P  LEU*     3.3    10.0    +      -       +      +
    123P  THR*     2.9    32.5    +      -       -      +
    193P  ILE*     3.5    33.2    -      -       +      -
    303P  PHE*     4.5    13.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 120 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95P  ILE*     4.9     1.1    -      -       -      -
    116P  THR      2.8    13.4    +      -       -      +
    117P  GLY      3.1     8.3    +      -       -      +
    119P  ILE*     1.3    76.9    -      -       -      +
    121P  LEU*     1.3    55.9    +      -       -      +
    123P  THR*     3.3     3.3    +      -       -      -
    124P  LEU*     2.9    31.7    +      -       -      +
    190P  ILE*     3.6    43.0    -      -       +      +
    193P  ILE*     3.7    20.0    -      -       +      -
    194P  THR*     3.7    11.9    -      -       -      +
    197P  HIS*     3.9    34.5    -      -       +      +
    502P  HEM      3.8    38.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 121 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92P  PHE*     4.7     7.9    -      -       +      -
     95P  ILE*     3.7    34.3    -      -       +      -
     96P  PHE*     4.9     6.5    -      -       +      -
     99P  ILE*     3.9    15.7    -      -       +      -
    117P  GLY      3.1    11.0    +      -       -      +
    118P  VAL*     3.2     9.8    +      -       +      +
    120P  LEU*     1.3    75.3    -      -       -      +
    122P  LEU*     1.3    66.7    +      -       -      +
    124P  LEU*     3.2     2.2    +      -       +      +
    125P  MET*     2.9    47.0    +      -       +      +
    299P  VAL*     4.0    14.4    -      -       +      -
    302P  LEU*     3.8    28.5    -      -       +      -
    502P  HEM      4.0     9.6    -      -       +      +
   3007P  PEE      5.1     6.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 122 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118P  VAL*     3.0    28.0    +      -       +      +
    119P  ILE*     3.3     9.6    +      -       +      +
    121P  LEU*     1.3    75.9    -      -       -      +
    123P  THR*     1.3    63.0    +      -       -      +
    125P  MET*     3.2    14.0    +      -       -      +
    126P  ALA*     3.1    22.0    +      -       -      +
    299P  VAL*     3.5    34.1    -      -       +      -
    300P  LEU*     4.2    22.2    -      -       +      -
    303P  PHE*     4.8     7.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 123 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119P  ILE*     2.9    27.5    +      -       -      +
    120P  LEU*     3.7     5.2    -      -       -      -
    122P  LEU*     1.3    75.3    -      -       -      +
    124P  LEU*     1.3    52.4    +      -       -      +
    126P  ALA*     3.2     7.5    +      -       -      +
    127P  THR*     2.8    39.5    +      -       -      +
    186P  LEU*     4.0    24.9    -      -       +      +
    189P  ALA*     4.6     5.4    -      -       +      -
    190P  ILE*     3.2    31.9    -      -       +      +
    193P  ILE*     4.3     6.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 124 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91P  PHE*     3.4    41.7    -      -       +      -
     92P  PHE*     3.7    29.8    -      -       +      -
     95P  ILE*     3.7    23.3    -      -       +      -
    120P  LEU      2.9    17.4    +      -       -      +
    121P  LEU*     3.5     4.9    -      -       -      +
    123P  THR*     1.3    73.4    -      -       -      +
    125P  MET*     1.3    66.3    +      -       -      +
    127P  THR*     3.2     1.3    +      -       -      -
    128P  ALA*     3.0    20.6    +      -       -      +
    190P  ILE*     3.8    12.7    -      -       +      +
    501P  HEM      3.8    35.2    -      -       +      -
    502P  HEM      6.0     1.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 125 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92P  PHE*     4.1    19.3    -      -       +      -
    121P  LEU*     2.9    42.1    +      -       +      +
    122P  LEU*     3.5    18.8    -      -       +      +
    124P  LEU*     1.3    74.3    -      -       -      +
    126P  ALA*     1.3    58.9    +      -       -      +
    128P  ALA*     3.1     4.3    +      -       -      +
    129P  PHE*     2.9    29.8    +      -       -      +
    274P  TYR      5.5     0.2    -      -       -      +
    275P  PHE*     3.8    16.1    -      -       +      -
    277P  PHE*     5.1     9.6    -      -       +      -
    278P  ALA*     5.3     0.2    -      -       +      -
    295P  LEU*     6.3     0.4    -      -       +      -
    299P  VAL*     4.2    26.0    -      -       +      -
   3001P  JZZ      3.4    41.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 126 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122P  LEU      3.1     9.7    +      -       -      +
    123P  THR*     3.5    10.3    -      -       -      +
    125P  MET*     1.3    77.4    -      -       -      +
    127P  THR*     1.3    64.5    +      -       -      +
    129P  PHE*     3.2     7.2    +      -       -      +
    130P  VAL*     3.1    30.3    +      -       +      +
    186P  LEU*     4.2    15.7    -      -       +      -
   3001P  JZZ      6.2     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with THR 127 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123P  THR      2.8    23.8    +      -       -      -
    124P  LEU*     3.2    12.1    +      -       -      -
    126P  ALA*     1.3    72.9    -      -       -      +
    128P  ALA*     1.3    57.3    +      -       -      +
    130P  VAL*     3.0    15.4    -      -       -      +
    131P  GLY      3.0     2.3    +      -       -      -
    183P  HIS*     2.8    31.5    +      -       -      +
    186P  LEU*     3.1    22.8    -      -       -      +
    187P  PRO*     3.8    15.7    -      -       +      -
    190P  ILE*     3.5     9.5    -      -       -      +
    501P  HEM      3.5    40.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 128 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88P  ALA*     5.5     0.4    -      -       +      -
     92P  PHE*     3.9    24.5    -      -       +      -
    124P  LEU      3.0    12.4    +      -       -      +
    125P  MET      3.7     6.3    -      -       -      +
    127P  THR*     1.3    73.4    -      -       -      +
    129P  PHE*     1.3    68.5    +      -       -      +
    131P  GLY      3.1     0.2    +      -       -      -
    132P  TYR*     2.9    26.9    +      -       -      +
    274P  TYR*     4.1    19.3    -      -       +      +
    275P  PHE*     4.6     1.1    -      -       +      -
    501P  HEM      3.6    23.6    -      -       +      +
   3001P  JZZ      4.3     2.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 129 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125P  MET      2.9    16.1    +      -       -      +
    126P  ALA*     3.5     8.7    -      -       -      +
    128P  ALA*     1.3    80.1    -      -       -      +
    130P  VAL*     1.3    70.5    +      -       +      +
    133P  VAL*     3.5     5.7    +      -       -      +
    144P  ALA*     4.0    13.2    -      -       -      -
    147P  ILE*     3.7    41.7    -      -       +      -
    148P  THR*     4.4    11.4    -      -       +      -
    179P  PHE*     4.4    17.5    -      +       -      -
    275P  PHE*     4.3     4.4    -      +       +      -
   3001P  JZZ      3.0    89.0    -      +       +      +
----------------------------------------------------------
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Residues in contact with VAL 130 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126P  ALA*     3.1    14.8    +      -       +      +
    127P  THR*     3.0    23.6    -      -       -      +
    129P  PHE*     1.3    82.0    -      -       +      +
    131P  GLY*     1.3    67.5    +      -       -      +
    133P  VAL*     3.2    12.6    +      -       -      +
    134P  LEU*     3.6    14.6    +      -       -      +
    179P  PHE*     4.0    41.1    -      -       +      +
    182P  LEU*     4.4    15.9    -      -       +      -
    183P  HIS*     3.4    30.5    -      -       +      +
    186P  LEU*     4.9     3.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 131 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    127P  THR      3.0     5.1    +      -       -      -
    128P  ALA      3.1     1.8    +      -       -      -
    130P  VAL*     1.3    84.1    -      -       -      +
    132P  TYR*     1.3    62.3    +      -       -      +
    134P  LEU*     3.1    22.5    +      -       -      +
    135P  PRO*     3.6     0.3    -      -       -      +
    183P  HIS*     3.1    36.8    -      -       -      -
    501P  HEM      3.4    18.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 132 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128P  ALA      2.9    12.2    +      -       -      +
    129P  PHE      3.7     0.4    -      -       -      +
    131P  GLY*     1.3    76.3    -      -       -      +
    133P  VAL*     1.3    61.3    +      -       -      +
    135P  PRO*     3.0    14.7    -      -       -      +
    139P  MET*     3.6    28.9    -      -       -      +
    140P  SER*     3.1    14.4    +      -       -      -
    253P  ASP*     4.5     6.2    +      -       -      +
    256P  ASN*     3.5    27.7    +      -       -      +
    272P  GLU*     3.4    29.5    +      -       +      -
    274P  TYR*     5.5     0.2    -      -       -      -
    501P  HEM      3.7    33.6    -      -       +      +
   3001P  JZZ      3.1    75.4    -      +       -      +
----------------------------------------------------------
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Residues in contact with VAL 133 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129P  PHE*     3.5     8.0    +      -       +      +
    130P  VAL      3.2     7.7    +      -       -      +
    131P  GLY      3.2     1.2    -      -       -      -
    132P  TYR*     1.3    78.3    -      -       -      +
    134P  LEU*     1.3    63.2    +      -       -      +
    136P  TRP*     2.9    47.1    +      -       +      -
    140P  SER*     3.5    12.7    -      -       -      +
    144P  ALA*     3.7    20.6    -      -       +      -
    171P  VAL*     5.3     0.9    -      -       +      -
    175P  THR*     6.3     0.7    -      -       +      -
    176P  LEU*     4.5     7.4    -      -       +      -
    179P  PHE*     3.9    26.9    -      -       +      -
   3001P  JZZ      3.2    25.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 134 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56P  TYR*     2.6    43.1    +      -       +      +
     63P  ALA*     3.5     6.2    -      -       -      +
    130P  VAL      3.6     8.7    -      -       -      +
    131P  GLY*     3.1    14.4    +      -       -      +
    133P  VAL*     1.3    77.1    -      -       -      +
    135P  PRO*     1.3    63.3    -      -       +      +
    136P  TRP*     3.0     2.1    +      -       -      +
    176P  LEU*     4.0    11.2    -      -       +      +
    179P  PHE*     4.4     2.0    -      -       +      -
    180P  PHE*     3.7    46.4    -      -       +      +
    183P  HIS*     3.6    33.4    -      -       +      -
    501P  HEM      3.6    22.9    -      -       +      -
----------------------------------------------------------
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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