Contacts of the helix formed by residues 95 - 122 (chain F) in PDB entry 1QGH


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 MET 95 (chain F).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37B  HIS*     5.4     2.2    -      -       +      -
     34F  MET*     3.6    47.1    -      -       +      -
     35F  ARG      3.7    27.0    +      -       -      +
     36F  GLY*     5.8     1.6    -      -       -      -
     38F  ASN*     3.8    15.9    -      -       +      +
     39F  PHE*     3.7    27.1    -      -       -      +
     42F  LEU*     3.7    26.0    -      -       +      -
     94F  THR*     1.3    75.7    -      -       +      +
     96F  ASP*     1.3    58.4    +      -       -      +
     98F  LEU*     3.3     6.9    +      -       -      +
     99F  MET*     2.8    44.3    +      -       +      +
    149F  PHE*     4.1    10.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 96 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37B  HIS*     2.8    40.6    +      -       -      -
     94F  THR*     2.5    21.7    -      -       +      +
     95F  MET*     1.3    69.4    -      -       -      +
     97F  GLN*     1.3    64.1    +      -       +      +
     99F  MET*     3.8     0.2    -      -       -      +
    100F  GLU*     2.7    37.8    +      -       -      +
    149F  PHE*     3.8     6.1    -      -       -      -
    150F  LEU*     3.7    28.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 97 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91F  LYS*     4.0    15.2    -      -       -      +
     92F  PRO      4.4     2.8    +      -       -      +
     93F  LYS*     3.1    32.6    -      -       +      +
     94F  THR*     3.0    46.5    +      -       +      +
     96F  ASP*     1.3    81.7    -      -       +      +
     98F  LEU*     1.3    62.1    +      -       -      +
    100F  GLU*     3.3    14.9    +      -       -      +
    101F  ASP*     3.1    19.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 98 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29F  GLN*     5.4     2.2    -      -       +      +
     30F  ILE*     3.7    29.2    -      -       +      +
     33F  TYR*     4.7     3.1    -      -       +      -
     34F  MET*     3.9    36.3    -      -       +      +
     35F  ARG      5.2     0.4    -      -       -      +
     89F  TYR*     4.4    11.2    -      -       +      +
     93F  LYS*     3.5    42.0    -      -       +      +
     94F  THR      2.6    32.1    +      -       -      +
     95F  MET*     3.5     6.7    -      -       -      +
     97F  GLN*     1.3    70.7    -      -       -      +
     99F  MET*     1.3    78.7    +      -       +      +
    101F  ASP*     3.1     9.5    +      -       +      +
    102F  LEU*     2.9    21.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 99 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30F  ILE*     3.5    33.9    -      -       +      -
     34F  MET*     4.7     0.9    -      -       +      -
     42F  LEU*     4.2    17.5    -      -       +      -
     46F  MET*     4.6     7.0    -      -       +      -
     95F  MET*     2.8    29.5    +      -       +      +
     96F  ASP      3.8     3.1    -      -       -      +
     98F  LEU*     1.3    78.1    -      -       +      +
    100F  GLU*     1.3    54.0    +      -       -      +
    102F  LEU*     2.8     7.9    +      -       +      +
    103F  VAL*     2.6    38.0    +      -       +      +
    146F  PHE*     3.7    33.4    -      -       +      -
    149F  PHE*     3.4    25.8    -      -       +      -
    150F  LEU*     4.0    20.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 100 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96F  ASP*     2.7    25.2    +      -       -      +
     97F  GLN*     3.6    15.8    -      -       -      +
     99F  MET*     1.3    77.3    -      -       -      +
    101F  ASP*     1.3    55.9    +      -       -      +
    103F  VAL*     3.7     4.0    -      -       -      +
    104F  GLY*     2.8    26.9    +      -       -      -
    150F  LEU*     3.7    27.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 101 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26F  LYS*     3.2    40.6    +      -       -      +
     29F  GLN*     4.7     4.0    +      -       -      -
     30F  ILE*     5.2     4.1    -      -       +      +
     93F  LYS*     4.5    16.3    +      -       -      -
     97F  GLN      3.1    10.9    +      -       -      +
     98F  LEU*     3.1    14.1    +      -       +      +
    100F  GLU*     1.3    71.9    -      -       -      +
    102F  LEU*     1.3    68.6    +      -       -      +
    104F  GLY*     3.3     1.5    +      -       -      -
    105F  THR*     3.1    22.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 102 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23F  PHE*     3.4    34.5    -      -       +      -
     26F  LYS*     5.2     1.3    -      -       -      -
     27F  ILE*     4.8     3.4    -      -       +      -
     30F  ILE*     4.0    18.8    -      -       +      +
     46F  MET*     4.0     8.3    -      -       +      -
     49F  LEU*     3.8    20.9    -      -       +      -
     98F  LEU      2.9    12.5    +      -       -      +
     99F  MET*     2.8    13.8    +      -       -      +
    101F  ASP*     1.3    76.2    -      -       -      +
    103F  VAL*     1.3    64.0    +      -       -      +
    105F  THR*     3.1     4.4    +      -       -      -
    106F  LEU*     2.9    26.4    +      -       +      +
    146F  PHE*     3.8    41.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 103 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99F  MET      2.6    21.3    +      -       -      +
    100F  GLU*     3.7     7.0    -      -       -      +
    102F  LEU*     1.3    75.5    -      -       -      +
    104F  GLY*     1.3    64.6    +      -       -      +
    106F  LEU*     3.2    10.0    +      -       +      +
    107F  GLU*     2.8    33.4    +      -       +      +
    143F  ILE*     4.9     7.6    -      -       +      +
    146F  PHE*     3.4    35.7    -      -       +      -
    147F  LYS*     3.8    32.1    -      -       +      +
    150F  LEU*     4.4    13.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 104 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100F  GLU      2.8    17.8    +      -       -      -
    101F  ASP*     3.8     1.8    -      -       -      -
    102F  LEU      3.2     0.2    -      -       -      -
    103F  VAL*     1.3    78.1    -      -       -      +
    105F  THR*     1.3    56.6    +      -       -      +
    107F  GLU*     3.0    16.3    +      -       -      +
    108F  LEU*     2.9    27.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 105 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23F  PHE*     3.4    37.7    -      -       +      -
     26F  LYS*     3.6    18.6    -      -       -      -
     84F  VAL*     3.9    28.0    -      -       +      +
     85F  GLU      5.2     0.2    +      -       -      -
    101F  ASP*     3.1    15.5    +      -       -      -
    102F  LEU      3.1     7.2    +      -       -      -
    104F  GLY*     1.3    76.0    -      -       -      +
    106F  LEU*     1.3    64.6    +      -       -      +
    108F  LEU*     3.2     8.6    +      -       +      +
    109F  LEU*     3.0    24.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 106 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23F  PHE*     3.8    23.6    -      -       +      -
     49F  LEU*     5.6     1.6    -      -       +      -
     53F  PHE*     3.8    25.6    -      -       +      -
    102F  LEU*     2.9    29.3    +      -       +      +
    103F  VAL*     3.5    14.1    -      -       +      +
    104F  GLY      3.1     0.2    -      -       -      -
    105F  THR*     1.3    78.4    -      -       -      +
    107F  GLU*     1.3    63.7    +      -       -      +
    109F  LEU*     3.2     4.9    +      -       +      +
    110F  ARG*     2.9    24.6    +      -       -      +
    139F  ILE*     3.6    16.1    -      -       +      +
    142F  HIS*     4.0    24.9    -      -       +      -
    143F  ILE*     3.7    21.1    -      -       +      +
    146F  PHE*     4.4    14.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 107 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103F  VAL*     2.8    26.7    +      -       +      +
    104F  GLY*     3.4    14.9    -      -       -      +
    106F  LEU*     1.3    74.8    -      -       -      +
    108F  LEU*     1.3    64.6    +      -       -      +
    110F  ARG*     3.2    26.1    +      -       -      +
    111F  ASP*     2.9    32.2    +      -       -      +
    143F  ILE*     3.9    18.2    -      -       +      +
    147F  LYS*     3.4    27.2    +      -       -      -
    154F  PRO      4.3     5.9    -      -       -      +
    155F  LEU*     5.8     0.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 108 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19F  ASN*     4.1     2.2    -      -       -      +
     83F  SER*     3.7    30.7    -      -       -      +
     84F  VAL*     4.0    22.9    -      -       +      -
     85F  GLU*     5.3     0.9    -      -       +      +
    104F  GLY      2.9    12.4    +      -       -      +
    105F  THR*     3.5    11.0    -      -       -      +
    106F  LEU      3.2     0.4    -      -       -      -
    107F  GLU*     1.3    77.2    -      -       -      +
    109F  LEU*     1.3    63.4    +      -       -      +
    111F  ASP*     3.2     6.8    +      -       -      +
    112F  GLU*     2.9    65.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 109 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16F  GLN*     3.6    23.3    -      -       -      +
     19F  ASN*     4.0    21.1    -      -       +      +
     20F  LEU*     4.2    14.1    -      -       +      -
     23F  PHE*     3.6    37.9    -      -       +      -
     53F  PHE*     4.8     6.5    -      -       +      -
     84F  VAL*     4.4     1.3    -      -       +      -
    105F  THR*     3.0    25.0    +      -       +      +
    106F  LEU*     3.7     8.3    -      -       +      +
    108F  LEU*     1.3    76.8    -      -       +      +
    110F  ARG*     1.3    57.3    +      -       -      +
    112F  GLU*     3.3     1.5    +      -       -      +
    113F  TYR*     2.7    50.6    +      -       +      +
    139F  ILE*     4.2    13.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 110 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106F  LEU      2.9    13.0    +      -       -      +
    107F  GLU*     3.3    32.9    +      -       -      +
    109F  LEU*     1.3    76.8    -      -       -      +
    111F  ASP*     1.3    93.2    +      -       -      +
    113F  TYR*     3.1     6.7    +      -       -      +
    114F  LYS*     2.9    24.0    +      -       +      +
    136F  LYS*     4.2    21.6    -      -       +      +
    139F  ILE*     4.0    14.6    -      -       +      +
    140F  ASP*     3.2    26.4    +      -       -      +
    143F  ILE*     3.7    19.8    -      -       +      +
    155F  LEU*     3.7    27.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 111 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107F  GLU*     2.9    23.9    +      -       -      +
    108F  LEU*     3.7     5.3    +      -       -      +
    110F  ARG*     1.3   106.1    +      -       -      +
    112F  GLU*     1.3    63.9    +      -       +      +
    114F  LYS*     3.1    17.9    +      -       -      +
    115F  GLN*     3.0    27.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 112 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12F  PHE*     3.2    11.4    -      -       +      -
     15F  HIS*     3.1    10.6    +      -       -      -
     16F  GLN*     2.9    29.2    +      -       -      +
     19F  ASN*     3.1     8.3    +      -       -      -
     83F  SER*     2.5    27.8    +      -       -      -
    108F  LEU*     2.9    38.8    +      -       +      +
    109F  LEU*     3.9     3.8    -      -       -      +
    111F  ASP*     1.3    77.9    -      -       +      +
    113F  TYR*     1.3    64.6    +      -       -      +
    115F  GLN*     3.0    14.8    +      -       +      +
    116F  GLY      3.0    16.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 113 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12F  PHE*     3.9     9.2    -      +       -      -
     16F  GLN*     3.6    35.2    -      -       +      +
     20F  LEU*     3.5    23.4    -      -       -      +
     56F  GLN*     2.8    19.6    +      -       -      -
     60F  VAL*     4.8     1.0    -      -       +      +
    109F  LEU*     2.7    38.1    +      -       +      +
    110F  ARG*     3.6     5.8    -      -       -      +
    112F  GLU*     1.3    73.6    -      -       -      +
    114F  LYS*     1.3    52.1    +      -       -      +
    116F  GLY*     2.8     3.1    +      -       -      -
    117F  ILE*     2.5    51.9    +      -       +      +
    132F  LEU*     3.9    19.2    -      -       +      +
    135F  PHE*     3.3    42.5    -      +       +      -
    136F  LYS*     4.2     6.7    -      -       +      -
    139F  ILE*     3.8    17.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 114 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124D  GLY*     3.7    14.5    +      -       -      -
    126D  ASP*     2.6    33.1    +      -       -      +
    110F  ARG*     2.9    13.5    +      -       +      +
    111F  ASP*     3.2    16.2    -      -       -      +
    112F  GLU      3.1     0.2    -      -       -      -
    113F  TYR*     1.3    75.9    -      -       -      +
    115F  GLN*     1.3    62.7    +      -       -      +
    117F  ILE*     3.0    13.7    +      -       +      +
    118F  GLU*     2.8    57.0    +      -       -      +
    136F  LYS*     4.6    14.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 115 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12F  PHE*     4.8     4.0    -      -       +      -
    111F  ASP*     3.0    24.7    +      -       -      +
    112F  GLU*     3.4    17.7    -      -       +      +
    114F  LYS*     1.3    81.5    -      -       -      +
    116F  GLY*     1.3    57.5    +      -       -      +
    118F  GLU*     3.2    27.6    +      -       -      +
    119F  LEU*     2.8    32.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 116 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12F  PHE*     3.4    36.7    -      -       -      -
    112F  GLU      3.0     6.3    +      -       -      -
    113F  TYR      2.8     9.8    +      -       -      -
    115F  GLN*     1.3    74.7    -      -       -      +
    117F  ILE*     1.3    64.4    +      -       -      +
    119F  LEU*     3.6     5.3    -      -       -      +
    120F  THR*     2.9    31.8    +      -       -      -
    132F  LEU*     4.0     4.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 117 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126D  ASP*     3.7    31.4    -      -       +      +
    113F  TYR      2.5    34.7    +      -       -      +
    114F  LYS*     3.2    11.4    -      -       +      +
    115F  GLN      3.0     0.2    -      -       -      -
    116F  GLY*     1.3    79.3    -      -       -      +
    118F  GLU*     1.3    64.5    +      -       -      +
    120F  THR*     4.7     0.4    -      -       -      -
    121F  ASP*     3.2     8.0    +      -       +      +
    129F  ASN*     3.2    35.7    +      -       -      +
    132F  LEU*     3.7    41.1    -      -       +      +
    133F  ILE*     3.8    14.4    -      -       +      +
    136F  LYS*     4.2    21.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 118 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114F  LYS*     2.8    46.7    +      -       -      +
    115F  GLN*     3.2    31.6    -      -       -      +
    117F  ILE*     1.3    71.2    -      -       -      +
    119F  LEU*     1.3    66.1    +      -       -      +
    121F  ASP*     3.1    10.1    +      -       -      +
    122F  LYS*     2.9    31.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 119 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7F  VAL*     4.3    23.1    -      -       +      +
      8F  ASP      4.0    20.9    -      -       -      +
      9F  THR*     4.1    12.3    -      -       -      +
     12F  PHE*     4.4    14.6    -      -       +      -
    115F  GLN*     2.8    19.0    +      -       +      +
    116F  GLY*     3.6     7.2    -      -       -      +
    118F  GLU*     1.3    80.9    -      -       -      +
    120F  THR*     1.3    54.3    +      -       -      +
    122F  LYS*     3.2     6.8    +      -       +      +
    123F  GLU*     2.7    57.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 120 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9F  THR*     4.1    12.3    +      -       -      +
     12F  PHE*     5.7     1.2    -      -       -      -
    116F  GLY*     2.9    22.2    +      -       -      -
    117F  ILE      3.8     2.9    -      -       -      -
    119F  LEU*     1.3    76.8    -      -       -      +
    121F  ASP*     1.3    59.9    +      -       -      +
    123F  GLU*     3.5     6.8    +      -       -      -
    124F  GLY      3.0     6.2    +      -       -      -
    125F  ASP*     2.6    66.6    +      -       +      +
    128F  THR*     3.7     8.6    -      -       -      +
    129F  ASN*     2.8    31.8    -      -       +      +
    132F  LEU*     3.9    11.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 121 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117F  ILE*     3.2    10.8    +      -       +      +
    118F  GLU*     3.1    14.0    +      -       -      +
    120F  THR*     1.3    75.9    -      -       -      +
    122F  LYS*     1.3    81.7    +      -       -      +
    124F  GLY*     2.8    16.7    +      -       -      -
    129F  ASN*     3.9    14.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 122 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118F  GLU*     2.9    17.2    +      -       +      +
    119F  LEU*     3.5     9.9    -      -       +      +
    121F  ASP*     1.3    95.1    +      -       -      +
    123F  GLU*     1.3    63.1    +      -       -      +
    124F  GLY*     3.1     3.8    +      -       -      -
----------------------------------------------------------
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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