Contacts of the helix formed by residues 93 - 120 (chain A) in PDB entry 4P9U


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 ASN 93 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90A  ASP*     3.0    38.4    +      -       +      +
     91A  ALA      3.0     0.8    -      -       -      -
     92A  GLU*     1.3    84.9    +      -       -      +
     94A  ALA*     1.3    57.3    +      -       -      +
     95A  THR*     3.0     7.6    -      -       -      +
     96A  SER*     2.9    36.7    +      -       -      +
     97A  ILE*     3.3    11.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 94 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87A  MET*     3.6    33.8    -      -       +      +
     90A  ASP      3.3     4.3    +      -       -      -
     91A  ALA*     2.9    19.0    +      -       -      +
     93A  ASN*     1.3    74.8    -      -       -      +
     95A  THR*     1.3    66.0    +      -       -      +
     96A  SER      3.5     0.3    +      -       -      -
     97A  ILE*     4.1     1.6    -      -       -      -
     98A  VAL*     3.3    27.0    +      -       -      +
    263A  TRP*     5.3     0.5    -      -       -      -
    270A  LEU*     5.2     7.6    -      -       +      -
    274A  PHE*     4.9     5.7    -      -       +      -
    275A  THR*     3.9    15.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 95 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91A  ALA      4.5     0.8    +      -       -      -
     92A  GLU      4.4     9.9    +      -       -      -
     93A  ASN*     4.6     3.4    -      -       -      -
     94A  ALA*     1.3    81.4    -      -       -      +
     96A  SER*     1.3    60.5    +      -       -      +
     98A  VAL*     4.0     2.8    +      -       -      +
     99A  GLU*     3.0    44.5    +      -       -      +
    263A  TRP*     4.8     6.0    +      -       -      +
    267A  LYS*     4.8    18.2    -      -       +      +
    270A  LEU*     5.6     7.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 96 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93A  ASN*     2.9    27.1    +      -       -      +
     95A  THR*     1.3    79.5    -      -       -      +
     97A  ILE*     1.3    73.6    +      -       -      +
     99A  GLU*     2.9    25.3    +      -       -      +
    100A  ASP*     3.0    20.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 97 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83A  LEU*     3.8    24.8    -      -       +      +
     86A  LEU*     3.7    34.5    -      -       +      +
     87A  MET*     3.7    35.4    -      -       +      +
     90A  ASP*     5.0     2.2    -      -       +      +
     93A  ASN*     3.3    14.6    +      -       +      +
     94A  ALA*     4.1     1.6    -      -       -      +
     95A  THR      3.5     0.4    -      -       -      -
     96A  SER*     1.3    84.0    +      -       -      +
     98A  VAL*     1.3    64.3    +      -       -      +
    100A  ASP*     2.9    22.1    +      -       -      +
    101A  LEU*     3.0    11.3    +      -       -      +
    211A  LEU*     3.9    24.6    -      -       +      +
    199B  GLN*     5.0     5.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 98 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87A  MET*     4.2    16.4    -      -       +      -
     94A  ALA      3.3    17.9    -      -       -      +
     95A  THR      4.3     1.3    -      -       -      +
     96A  SER      3.3     0.4    -      -       -      -
     97A  ILE*     1.3    74.9    -      -       -      +
     99A  GLU*     1.3    53.6    +      -       -      +
    101A  LEU*     2.9     9.9    +      -       +      +
    102A  LEU*     2.7    43.7    +      -       +      +
    211A  LEU*     5.3     0.7    -      -       +      -
    215A  VAL*     3.8    41.1    -      -       +      -
    263A  TRP*     3.5    41.3    -      -       +      +
    274A  PHE*     4.6     2.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 99 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95A  THR*     3.0    40.4    -      -       -      +
     96A  SER*     2.9    12.2    +      -       -      +
     98A  VAL*     1.3    75.0    -      -       -      +
    100A  ASP*     1.3    60.6    +      -       -      +
    102A  LEU*     3.9    10.2    -      -       -      +
    103A  ALA*     3.1    28.1    +      -       -      +
    263A  TRP*     4.4    15.3    -      -       +      +
    267A  LYS*     4.3    13.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 100 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83A  LEU*     5.5     2.4    -      -       +      +
     96A  SER*     3.0    19.7    +      -       -      +
     97A  ILE*     2.9    14.4    +      -       +      +
     99A  GLU*     1.3    77.5    -      -       -      +
    101A  LEU*     1.3    58.2    +      -       -      +
    103A  ALA      2.9     1.2    +      -       -      -
    104A  ALA*     2.8    32.9    +      -       -      +
    197B  GLY      3.6    15.6    -      -       -      +
    198B  ASN*     3.3    34.0    +      -       -      +
    199B  GLN*     3.7    27.3    +      -       +      +
    200B  ILE*     3.9     9.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 101 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97A  ILE      3.0    10.8    +      -       -      +
     98A  VAL*     2.9     9.8    +      -       +      +
    100A  ASP*     1.3    77.1    -      -       -      +
    102A  LEU*     1.3    67.4    +      -       +      +
    104A  ALA*     4.2     0.7    -      -       -      +
    105A  ARG*     3.3    24.3    +      -       +      +
    208A  LEU*     4.0    29.6    -      -       +      +
    211A  LEU*     3.6    40.4    -      -       +      +
    212A  TYR*     4.1    30.3    -      -       +      -
    215A  VAL*     3.9    25.1    -      -       +      -
    200B  ILE*     3.6     8.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 102 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98A  VAL*     2.7    41.5    +      -       +      +
     99A  GLU*     4.2     6.7    -      -       -      +
    101A  LEU*     1.3    78.3    -      -       +      +
    103A  ALA*     1.3    58.0    +      -       -      +
    105A  ARG*     4.1    28.6    +      -       -      +
    106A  THR*     2.5    36.2    +      -       -      +
    215A  VAL*     5.0    10.3    -      -       +      -
    219A  TYR*     6.5     0.2    -      -       +      -
    259A  SER*     5.4     5.4    -      -       -      +
    260A  GLY*     5.6     4.9    -      -       -      -
    263A  TRP*     3.9    32.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 103 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99A  GLU      3.1    20.3    +      -       -      +
    100A  ASP*     2.9     4.6    +      -       -      +
    102A  LEU*     1.3    75.1    -      -       -      +
    104A  ALA*     1.3    60.7    +      -       -      +
    106A  THR*     2.9     8.6    +      -       -      -
    107A  ASN*     2.8    40.4    +      -       -      +
    198B  ASN*     3.7    11.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 104 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100A  ASP      2.8    19.3    +      -       -      +
    101A  LEU      4.2     1.1    -      -       -      +
    103A  ALA*     1.3    72.2    -      -       -      +
    105A  ARG*     1.3    63.2    +      -       -      +
    107A  ASN*     2.9     2.8    +      -       -      +
    108A  ILE*     2.9    36.0    +      -       +      +
    208A  LEU*     5.7     1.3    -      -       +      -
    198B  ASN*     3.5     9.0    -      -       -      +
    200B  ILE*     3.6    34.3    -      -       +      -
    201B  TYR*     3.9    18.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 105 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101A  LEU*     3.3    18.2    +      -       +      +
    102A  LEU*     4.1    26.1    +      -       -      +
    103A  ALA      3.3     0.4    -      -       -      -
    104A  ALA*     1.3    79.7    -      -       -      +
    106A  THR*     1.3    63.3    +      -       -      +
    108A  ILE*     4.3     8.1    -      -       -      -
    109A  SER*     2.2    45.0    +      -       -      +
    185A  ASP*     3.6    11.5    +      -       -      -
    189A  PHE*     3.6    33.2    -      -       +      -
    205A  PHE*     4.1    12.3    -      -       +      -
    212A  TYR*     2.9    41.0    +      -       +      -
    219A  TYR*     6.3     0.8    -      -       -      -
    220A  PHE*     6.1     0.2    -      -       -      -
    255A  TYR*     3.7    26.1    +      -       -      -
    256A  GLY*     6.3     0.2    -      -       -      -
    259A  SER*     4.6     7.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 106 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    102A  LEU*     2.5    24.7    +      -       -      +
    103A  ALA*     2.9     7.9    +      -       -      -
    105A  ARG*     1.3    82.7    +      -       -      +
    107A  ASN*     1.3    64.5    +      -       -      +
    110A  PRO*     3.4    16.7    -      -       -      +
    252A  ILE*     3.8    30.5    -      -       +      +
    253A  ARG*     4.5    11.7    -      -       +      +
    256A  GLY*     4.1    19.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 107 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103A  ALA*     2.8    28.5    +      -       -      +
    104A  ALA      2.9     2.4    +      -       -      +
    106A  THR*     1.3    82.9    -      -       -      +
    108A  ILE*     1.3    59.3    +      -       -      +
    109A  SER      3.4     0.2    -      -       -      -
    110A  PRO*     3.4    13.9    -      -       -      +
    111A  ILE*     4.0     9.4    -      -       -      +
    111B  ILE*     3.7    27.3    -      -       +      +
    115B  TYR*     4.1    25.0    +      -       -      -
    198B  ASN*     4.7     0.4    -      -       -      +
    201B  TYR*     2.8    37.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 108 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104A  ALA*     2.9    26.6    +      -       +      +
    105A  ARG*     4.3     4.7    -      -       -      +
    107A  ASN*     1.3    77.2    -      -       +      +
    109A  SER*     1.3    65.7    +      -       -      +
    110A  PRO      3.4     1.3    -      -       -      -
    111A  ILE*     3.1    22.3    +      -       +      +
    112A  PHE*     3.0    28.3    -      -       +      -
    201A  TYR*     4.7    13.2    -      -       +      +
    204A  ILE*     4.4    34.5    -      -       +      -
    205A  PHE*     4.8     8.3    -      -       +      -
    108B  ILE*     4.4    16.8    -      -       +      -
    111B  ILE*     5.4     2.5    -      -       +      -
    200B  ILE*     6.3     1.1    -      -       +      -
    201B  TYR*     4.1    24.7    -      -       +      +
    204B  ILE*     5.8     3.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 109 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105A  ARG*     2.2    39.8    +      -       -      +
    106A  THR*     4.5     0.2    -      -       -      -
    108A  ILE*     1.3    73.1    -      -       -      +
    110A  PRO*     1.3    72.4    -      -       -      +
    111A  ILE      3.0     1.8    -      -       -      -
    112A  PHE*     3.4    16.8    -      -       -      -
    113A  MET*     3.1    36.8    +      -       -      +
    189A  PHE*     3.6    10.1    -      -       -      -
    252A  ILE*     3.5    20.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with PRO 110 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106A  THR      3.4    16.4    -      -       -      +
    107A  ASN      3.4    17.5    -      -       -      +
    109A  SER*     1.3    91.6    -      -       -      +
    111A  ILE*     1.3    64.3    +      -       +      +
    113A  MET      4.3     0.4    -      -       -      -
    114A  ARG*     3.6    24.4    +      -       -      +
    248A  LEU*     3.6    20.7    -      -       +      +
    249A  PRO*     4.6    16.8    -      -       +      -
    252A  ILE*     3.4    18.1    -      -       +      -
    253A  ARG*     5.8     3.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 111 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107A  ASN      4.0     8.1    -      -       -      +
    108A  ILE*     3.3    24.2    -      -       +      +
    109A  SER      3.0     0.8    -      -       -      -
    110A  PRO*     1.3    85.1    -      -       +      +
    112A  PHE*     1.3    62.6    +      -       -      +
    114A  ARG*     4.0     3.0    -      -       -      +
    115A  TYR*     3.3    27.5    +      -       +      -
    201A  TYR*     3.2    31.9    -      -       +      +
    107B  ASN*     3.7    33.4    -      -       +      +
    108B  ILE*     5.6     1.8    -      -       +      -
    111B  ILE*     4.9    12.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 112 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108A  ILE*     3.0    24.1    +      -       +      -
    109A  SER*     3.4    29.8    -      -       -      -
    111A  ILE*     1.3    78.5    -      -       -      +
    113A  MET*     1.3    99.0    +      -       +      +
    115A  TYR*     3.5     3.0    +      -       -      -
    116A  ALA*     2.9    27.7    +      -       -      +
    189A  PHE*     3.7    17.7    -      +       -      -
    192A  LEU      3.6     6.3    -      -       -      -
    193A  ALA*     3.4    18.2    -      -       -      -
    196A  SER*     3.3    19.7    -      -       -      +
    201A  TYR*     3.8    36.3    -      +       +      -
    205A  PHE*     3.7    32.5    -      +       -      -
----------------------------------------------------------
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Residues in contact with MET 113 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109A  SER*     3.1    22.4    +      -       -      +
    112A  PHE*     1.3    97.9    -      -       +      +
    114A  ARG*     1.3    54.2    +      -       -      +
    116A  ALA*     3.0     7.2    +      -       -      +
    117A  PHE*     2.7    52.3    +      -       +      -
    188A  LEU*     4.3     2.7    -      -       +      -
    189A  PHE*     3.6    37.0    -      -       +      -
    192A  LEU*     4.1    26.0    -      -       +      -
    232A  PHE*     5.1     1.1    -      -       +      -
    236A  LEU*     4.0    30.1    -      -       +      -
    248A  LEU*     4.5     5.6    -      -       +      -
    252A  ILE*     3.9    17.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 114 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    110A  PRO      3.6    21.3    +      -       -      +
    111A  ILE*     4.0     6.3    -      -       -      +
    112A  PHE      3.4     0.4    -      -       -      -
    113A  MET*     1.3    74.7    -      -       -      +
    115A  TYR*     1.3    95.4    +      -       +      +
    117A  PHE*     3.0    19.9    +      -       -      +
    118A  LYS*     3.1    24.4    +      -       +      +
    245A  ARG*     3.2    56.2    -      -       +      +
    248A  LEU*     4.7     8.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 115 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111A  ILE*     3.3    23.5    +      -       +      -
    112A  PHE*     3.5     8.4    +      -       -      +
    113A  MET      3.3     0.4    -      -       -      -
    114A  ARG*     1.3   108.0    +      -       +      +
    116A  ALA*     1.3    63.5    +      -       -      +
    118A  LYS*     3.0     7.8    +      -       -      -
    119A  LEU*     2.9    43.3    +      -       +      +
    196A  SER*     3.8    23.6    -      -       -      +
    198A  ASN*     6.3     1.3    -      -       +      -
    201A  TYR*     5.4     4.0    -      +       -      -
    107B  ASN*     3.7    23.8    +      -       -      -
    253B  ARG*     3.1    28.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 116 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112A  PHE      2.9    18.2    +      -       -      +
    113A  MET*     3.0     8.9    +      -       -      +
    115A  TYR*     1.3    78.4    -      -       -      +
    117A  PHE*     1.3    65.1    +      -       +      +
    120A  ASN*     3.1    31.2    +      -       -      +
    124A  ALA*     4.0     2.0    -      -       +      +
    192A  LEU*     3.6    25.6    -      -       +      +
    195A  HIS*     3.2    27.8    -      -       +      +
    196A  SER*     4.1     0.4    -      -       -      +
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Residues in contact with PHE 117 (chain A). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    113A  MET*     2.7    34.8    +      -       +      +
    114A  ARG*     3.0     9.8    +      -       -      +
    116A  ALA*     1.3    78.9    -      -       +      +
    118A  LYS*     1.3    61.3    +      -       +      +
    121A  LYS*     3.4    26.2    -      -       -      +
    124A  ALA*     4.1     3.4    -      -       +      -
    128A  MET*     3.9    19.3    -      -       -      -
    192A  LEU*     4.2    18.8    -      -       +      -
    236A  LEU*     3.9    31.2    -      -       +      -
    239A  VAL*     4.0    11.2    -      -       +      -
    240A  CYS*     3.6    37.8    -      -       +      +
    243A  GLY*     6.1     0.7    -      -       -      -
    245A  ARG*     5.2     8.7    -      -       +      -
    248A  LEU*     3.8    27.6    -      -       +      -
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Residues in contact with LYS 118 (chain A). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114A  ARG*     3.1    17.2    +      -       -      +
    115A  TYR*     3.0    11.3    +      -       -      +
    117A  PHE*     1.3    83.8    -      -       -      +
    119A  LEU*     1.3    76.9    +      -       +      +
    121A  LYS*     4.2     7.8    +      -       -      +
    245A  ARG*     3.1    50.9    -      -       +      +
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Residues in contact with LEU 119 (chain A). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115A  TYR*     2.9    40.4    +      -       +      +
    118A  LYS*     1.3    89.7    -      -       +      +
    120A  ASN*     1.3    74.5    +      -       -      +
    121A  LYS*     3.6     2.1    +      -       -      +
    195A  HIS      5.0     2.7    -      -       -      +
    196A  SER      4.2    13.7    -      -       -      +
    197A  GLY*     4.9     8.1    -      -       -      -
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Residues in contact with ASN 120 (chain A). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116A  ALA      3.1    14.5    +      -       -      +
    119A  LEU*     1.3    87.5    -      -       -      +
    121A  LYS*     1.3    65.0    +      -       -      +
    122A  GLU      3.5     1.8    -      -       -      -
    123A  SER*     4.1    11.5    +      -       -      +
    124A  ALA*     3.1    15.2    +      -       -      +
    195A  HIS*     3.5    51.3    +      -       +      +
    197A  GLY*     5.2     4.2    -      -       -      +
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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