Contacts of the helix formed by residues 98 - 122 (chain C) in PDB entry 2PGW


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 98 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87C  PHE*     4.6     1.7    -      -       -      -
     91C  TYR*     3.6    27.4    -      -       +      -
     96C  ALA*     2.8    28.5    +      -       +      +
     97C  ASN*     1.3    72.5    -      -       -      +
     99C  MSE      1.3    58.5    +      -       -      +
    100C  ARG      3.4     2.7    -      -       -      -
    101C  ALA*     3.2    20.7    +      -       +      +
    102C  ALA*     2.9    24.6    +      -       -      +
     55H  PRO*     4.7     6.7    -      -       +      -
    100H  ARG*     3.6    18.4    -      -       +      +
    101H  ALA*     3.5    32.5    -      -       +      +
    104H  GLN*     3.8    22.9    -      -       +      +
    251H  PHE*     4.8     4.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with MSE 99 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87C  PHE*     4.0    24.2    -      -       +      -
     97C  ASN      3.5     4.6    +      -       -      -
     98C  ILE*     1.3    74.5    -      -       -      +
    100C  ARG*     1.3    52.9    +      -       +      +
    102C  ALA*     3.2     2.0    +      -       -      +
    103C  ASN*     2.7    52.7    +      -       -      +
    252C  THR*     3.6    35.2    -      -       +      -
    253C  LEU*     5.2     1.3    -      -       -      -
    254C  TYR*     4.0    20.4    -      -       +      +
    100H  ARG*     5.3     1.4    -      -       -      +
    228H  TRP*     3.4    59.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 100 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98C  ILE      3.4     0.4    -      -       -      -
     99C  MSE      1.3    75.2    -      -       +      +
    101C  ALA*     1.3    62.3    +      -       -      +
    103C  ASN*     3.3    10.6    +      -       -      +
    104C  GLN*     3.1    19.8    +      -       -      +
    227C  SER*     5.1     2.4    +      -       -      -
    228C  TRP*     3.6    20.9    -      -       -      -
    248C  GLN      4.0     5.3    +      -       -      -
    249C  ALA*     3.7    13.9    +      -       -      +
    251C  PHE*     3.4    45.1    -      -       +      +
    252C  THR*     3.8    10.4    -      -       +      +
    255C  ASP*     3.0    29.8    +      -       -      -
    273C  ARG      4.8     1.0    -      -       -      +
    274C  GLU      4.7     0.9    -      -       -      +
   2300C  GOL      4.1    16.4    +      -       -      -
     97H  ASN*     3.0    29.4    +      -       -      +
     98H  ILE*     3.5    21.0    -      -       +      +
     99H  MSE      5.3     1.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 101 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91C  TYR*     4.8     2.2    -      -       +      -
     98C  ILE*     3.2    20.4    +      -       +      +
    100C  ARG*     1.3    75.3    -      -       -      +
    102C  ALA*     1.3    66.1    +      -       -      +
    104C  GLN*     3.2    20.8    +      -       -      +
    105C  ILE*     3.6    10.0    +      -       -      +
     98H  ILE*     3.5    18.5    -      -       +      +
    101H  ALA*     3.4    33.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 102 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87C  PHE*     3.4    39.0    -      -       +      -
     91C  TYR*     3.7    24.8    -      -       +      -
     98C  ILE      2.9    12.7    +      -       -      +
     99C  MSE      3.5     3.4    -      -       -      +
    101C  ALA*     1.3    75.8    -      -       -      +
    103C  ASN*     1.3    65.0    +      -       -      +
    105C  ILE*     3.1     5.9    +      -       -      +
    106C  PHE*     3.0    32.0    +      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 103 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99C  MSE      2.7    46.6    +      -       -      +
    100C  ARG*     3.4     5.1    -      -       -      +
    101C  ALA      3.2     0.2    -      -       -      -
    102C  ALA*     1.3    74.5    -      -       -      +
    104C  GLN*     1.3    62.3    +      -       -      +
    106C  PHE*     4.5     7.1    -      -       -      +
    107C  SER*     2.9    23.2    +      -       -      -
    252C  THR*     3.9    13.7    -      -       -      +
    273C  ARG      3.8     2.0    -      -       -      +
    274C  GLU      3.0    28.8    +      -       -      +
    275C  ILE*     3.5    23.0    +      -       -      +
    276C  GLY*     3.4    15.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 104 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51C  CYS*     3.7    15.8    -      -       -      +
     52C  THR*     3.1    48.5    +      -       -      +
     53C  VAL*     3.9     2.0    -      -       -      +
     54C  ALA*     3.0    28.9    +      -       -      +
     60C  THR*     4.4     7.0    -      -       -      +
    100C  ARG      3.1    11.7    +      -       -      +
    101C  ALA*     3.2    12.3    +      -       -      +
    103C  ASN*     1.3    76.4    -      -       -      +
    105C  ILE*     1.3    67.9    +      -       +      +
    107C  SER*     3.8     8.3    -      -       -      -
    273C  ARG*     3.6    20.7    +      -       +      +
     96H  ALA*     4.1    12.0    -      -       -      +
     98H  ILE*     3.9    22.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 105 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51C  CYS*     3.1    26.3    -      -       +      -
     52C  THR      5.2     0.2    -      -       -      +
     60C  THR*     4.3    31.0    -      -       +      +
     63C  ILE*     4.2    10.3    -      -       +      -
     64C  LEU*     3.6    37.5    -      -       +      +
     67C  LEU*     3.6    21.8    -      -       +      -
     91C  TYR*     4.0    13.0    -      -       -      +
    101C  ALA      3.7    13.9    -      -       -      +
    102C  ALA      3.1     5.1    +      -       -      +
    104C  GLN*     1.3    87.7    -      -       +      +
    106C  PHE*     1.3    65.3    +      -       -      +
    107C  SER      3.1     3.0    +      -       -      -
    108C  GLY      3.2     1.9    +      -       -      -
    109C  ILE*     3.6     8.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 106 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67C  LEU*     3.9    14.8    -      -       +      -
     83C  ILE*     3.5    38.8    -      -       +      -
     86C  ILE*     3.7    25.8    -      -       +      -
     87C  PHE*     3.7    43.7    -      +       +      -
     91C  TYR*     4.3     4.7    -      +       -      -
    102C  ALA*     3.0    40.4    +      -       +      +
    103C  ASN*     4.2     8.5    -      -       -      +
    105C  ILE*     1.3    76.8    -      -       -      +
    107C  SER*     1.3    56.5    +      -       -      +
    109C  ILE*     3.6    20.0    -      -       +      +
    110C  ASP*     2.8    33.4    +      -       -      +
    276C  GLY*     3.7    11.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 107 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50C  GLU      4.9     2.3    +      -       -      -
     51C  CYS*     5.9     0.2    -      -       -      -
    103C  ASN      2.9    14.9    +      -       -      -
    104C  GLN      3.8     9.4    -      -       -      -
    105C  ILE      3.1     0.6    -      -       -      -
    106C  PHE*     1.3    77.2    -      -       -      +
    108C  GLY*     1.3    56.7    -      -       -      +
    110C  ASP*     3.9     1.6    -      -       -      +
    111C  MSE      2.9    36.5    +      -       -      +
    272C  PRO*     3.1    43.8    +      -       -      +
    273C  ARG*     3.4     7.8    +      -       -      +
    276C  GLY      3.6    12.1    +      -       -      -
    277C  GLY*     4.2     2.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 108 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37C  ILE*     3.4    17.4    -      -       -      +
     49C  GLY*     3.8     0.5    -      -       -      -
     50C  GLU      3.4    26.6    +      -       -      -
     51C  CYS*     3.7    13.0    -      -       -      -
    105C  ILE      3.2     5.5    +      -       -      -
    107C  SER*     1.3    76.2    -      -       -      +
    109C  ILE*     1.3    61.1    +      -       -      +
    111C  MSE      3.3     5.4    -      -       -      +
    112C  ALA*     2.8    24.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 109 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37C  ILE*     4.1     9.8    -      -       +      +
     39C  ILE*     3.8     4.0    -      -       +      +
     64C  LEU*     3.8    25.6    -      -       +      -
     67C  LEU*     4.0    24.2    -      -       +      +
     68C  ALA*     4.2    13.0    -      -       +      +
     71C  LEU*     3.8    28.0    -      -       +      -
     83C  ILE*     4.4    17.3    -      -       +      -
     86C  ILE*     5.7     1.3    -      -       +      -
    105C  ILE*     3.6     7.1    +      -       +      +
    106C  PHE*     3.2    30.6    +      -       +      +
    108C  GLY*     1.3    77.2    -      -       -      +
    110C  ASP*     1.3    58.4    +      -       -      +
    112C  ALA*     3.1     4.7    +      -       -      +
    113C  MSE      2.8    36.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 110 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79C  VAL*     3.2    18.8    -      -       -      +
     83C  ILE*     4.0    10.5    -      -       +      +
    106C  PHE      2.8    20.0    +      -       -      +
    107C  SER      4.0     2.0    -      -       -      +
    109C  ILE*     1.3    74.0    -      -       -      +
    111C  MSE      1.3    63.6    +      -       -      +
    113C  MSE      3.2     5.9    +      -       -      +
    114C  TRP*     2.9    55.4    +      -       -      -
    276C  GLY      3.9    10.1    -      -       -      +
    277C  GLY*     4.0     2.9    -      -       -      -
    278C  ILE      2.7    29.4    +      -       -      -
    279C  GLN*     3.2    16.7    +      -       -      +
    280C  PRO*     4.2     4.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with MSE 111 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48C  ILE      4.3     0.7    -      -       -      -
     49C  GLY*     4.0     5.8    -      -       -      -
     50C  GLU      3.8    27.8    -      -       -      +
    107C  SER*     2.9    39.7    +      -       -      +
    108C  GLY      3.3     6.3    -      -       -      +
    110C  ASP*     1.3    80.0    +      -       -      +
    112C  ALA*     1.3    62.3    +      -       -      +
    114C  TRP*     3.5     2.8    +      -       -      +
    115C  ASP*     3.2    20.8    +      -       -      +
    272C  PRO*     4.1    17.5    -      -       +      -
    278C  ILE*     4.1    12.5    -      -       +      +
    305C  ILE*     4.1    12.3    -      -       -      -
    306C  THR*     4.0    18.2    -      -       -      +
    309C  ALA*     3.7    26.5    -      -       +      -
    356C  LEU*     3.7    21.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 112 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37C  ILE*     3.7    11.4    -      -       +      +
     39C  ILE*     3.6    19.5    -      -       +      -
     47C  GLY*     3.5    10.3    -      -       -      +
     48C  ILE      3.7    12.6    -      -       -      +
     49C  GLY*     3.6    16.8    -      -       -      +
    108C  GLY      2.8    16.5    +      -       -      +
    109C  ILE      3.6     3.4    -      -       -      +
    111C  MSE      1.3    77.1    -      -       -      +
    113C  MSE      1.3    57.1    +      -       -      +
    115C  ASP*     3.3     2.3    +      -       -      +
    116C  LEU*     2.9    29.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with MSE 113 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6C  ILE*     3.7    24.5    -      -       +      -
     39C  ILE*     3.8    19.3    -      -       +      -
     71C  LEU*     4.1     9.4    -      -       +      -
     75C  SER      3.7     7.9    -      -       -      +
     76C  PRO*     3.6    37.2    -      -       +      +
     79C  VAL*     3.7    44.4    -      -       +      -
     82C  LEU*     3.8    13.5    -      -       +      -
    109C  ILE*     2.8    30.8    +      -       +      +
    110C  ASP      3.2     5.1    +      -       -      +
    112C  ALA*     1.3    72.4    -      -       -      +
    114C  TRP*     1.3    57.8    +      -       -      +
    116C  LEU*     3.3     7.3    +      -       -      +
    117C  GLN*     2.9    32.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 114 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79C  VAL*     3.8    17.2    -      -       +      +
    110C  ASP*     2.9    57.6    +      -       -      +
    111C  MSE      4.1     2.5    -      -       -      +
    113C  MSE      1.3    73.3    -      -       -      +
    115C  ASP*     1.3    60.6    +      -       -      +
    117C  GLN*     3.7    30.0    -      -       -      +
    118C  GLY      2.9    24.6    +      -       -      -
    125C  VAL*     3.5    24.1    -      -       +      +
    128C  LEU*     4.1    24.5    -      -       +      +
    129C  LEU*     4.1    25.6    -      -       +      -
    278C  ILE*     4.2    17.0    -      -       +      -
    279C  GLN*     3.5    42.5    -      -       +      +
    128F  LEU      4.4    12.6    -      -       -      -
    130F  GLY*     4.2    13.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 115 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47C  GLY*     3.4     1.4    -      -       -      -
     48C  ILE*     2.8    26.5    +      -       -      +
    111C  MSE      3.2    14.8    +      -       -      +
    112C  ALA      3.5     8.1    -      -       -      +
    114C  TRP*     1.3    75.3    -      -       -      +
    116C  LEU*     1.3    58.1    +      -       -      +
    118C  GLY      3.3     1.6    +      -       -      -
    119C  LYS*     2.8    70.9    +      -       -      +
    125C  VAL*     4.3     0.6    -      -       -      +
    355C  GLY*     3.5     1.4    -      -       -      -
    356C  LEU*     2.8    49.7    +      -       +      +
    357C  GLY      4.2     1.0    +      -       -      -
    358C  PHE*     4.3     3.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 116 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6C  ILE*     4.6     1.3    -      -       +      -
     39C  ILE*     3.8    31.2    -      -       +      +
     41C  ALA*     4.2     9.6    -      -       +      -
     45C  THR*     3.4    45.8    -      -       +      +
     47C  GLY*     3.8    12.5    -      -       -      +
     76C  PRO*     3.5    34.3    -      -       +      -
    112C  ALA      2.9    13.7    +      -       -      +
    113C  MSE      3.4    10.3    -      -       -      +
    115C  ASP*     1.3    77.4    -      -       -      +
    117C  GLN*     1.3    61.9    +      -       -      +
    119C  LYS*     3.2     4.2    +      -       -      +
    120C  LEU*     2.9    35.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 117 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76C  PRO*     3.0    31.1    +      -       +      +
     77C  HIS*     3.4    34.0    +      -       +      +
     79C  VAL*     3.7    22.4    -      -       -      +
    113C  MSE      2.9    18.2    +      -       -      +
    114C  TRP*     3.3    36.3    +      -       -      +
    116C  LEU*     1.3    75.3    -      -       -      +
    118C  GLY*     1.3    63.0    +      -       -      +
    120C  LEU*     3.3    10.5    +      -       -      +
    121C  ALA*     3.0    24.6    +      -       -      +
    128C  LEU*     4.0    12.4    -      -       +      +
    127F  GLN      3.9     9.4    -      -       -      +
    128F  LEU*     5.2     1.6    -      -       -      -
    130F  GLY*     5.5     0.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 118 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114C  TRP      2.9    11.5    +      -       -      -
    115C  ASP      3.7     1.6    -      -       -      -
    117C  GLN*     1.3    76.8    -      -       -      +
    119C  LYS*     1.3    51.5    +      -       -      +
    121C  ALA*     3.4     1.3    +      -       -      -
    122C  GLY*     2.7    29.8    +      -       -      -
    123C  LEU      2.9    30.4    +      -       -      -
    128C  LEU*     3.6    14.5    -      -       -      +
    355C  GLY*     3.4    11.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 119 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45C  THR*     3.7    19.9    +      -       +      -
     46C  VAL      3.0    26.0    +      -       -      +
     48C  ILE*     4.3     9.5    -      -       -      +
    115C  ASP*     2.8    51.3    +      -       -      +
    116C  LEU      3.7     0.7    -      -       -      +
    118C  GLY*     1.3    76.5    -      -       -      +
    120C  LEU*     1.3    63.9    +      -       -      +
    122C  GLY*     3.3    10.2    +      -       -      -
    354C  PRO*     4.0    29.1    -      -       +      +
    357C  GLY      5.8     0.2    -      -       -      +
    358C  PHE*     5.0    16.8    +      -       -      +
    359C  GLN*     6.1     2.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 120 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4C  VAL*     4.3    25.1    -      -       +      -
     43C  ASP*     3.6    17.5    -      -       -      +
     45C  THR*     3.5    27.8    -      -       -      +
     76C  PRO*     4.3    17.0    -      -       +      -
     77C  HIS*     4.3    15.3    -      -       +      +
    116C  LEU*     2.9    40.8    +      -       +      +
    117C  GLN*     3.7     5.4    -      -       -      +
    118C  GLY      3.3     0.2    -      -       -      -
    119C  LYS*     1.3    77.0    -      -       -      +
    121C  ALA*     1.3    60.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 121 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77C  HIS*     6.2     1.6    -      -       +      -
    117C  GLN      3.0    16.5    +      -       -      +
    118C  GLY      4.1     1.8    -      -       -      +
    120C  LEU*     1.3    77.6    -      -       +      +
    122C  GLY*     1.3    61.0    -      -       -      +
    123C  LEU*     3.6    26.7    +      -       +      +
    128C  LEU*     4.5     8.5    -      -       +      -
    121F  ALA*     5.2    13.5    -      -       +      +
    123F  LEU*     5.9     4.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 122 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118C  GLY      2.7    14.2    +      -       -      -
    119C  LYS      3.3    10.0    +      -       -      -
    120C  LEU      3.8     0.2    +      -       -      -
    121C  ALA*     1.3    76.0    -      -       -      +
    123C  LEU*     1.3    61.5    +      -       -      +
    124C  PRO*     4.7     1.4    -      -       -      +
    352C  ARG      5.8     0.2    -      -       -      +
    354C  PRO*     4.0    22.5    -      -       -      +
----------------------------------------------------------
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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