Contacts of the helix formed by residues 95 - 121 (chain F) in PDB entry 5X22


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 THR 95 (chain F).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93F  LEU      3.7     2.0    +      -       -      -
     94F  LEU*     1.3    74.8    -      -       -      +
     96F  LEU*     1.3    69.4    +      -       +      +
     97F  GLU*     3.2    34.5    -      -       -      +
     98F  GLU*     2.5    43.6    +      -       -      -
     99F  GLU*     3.0    10.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 96 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    349D  PRO*     4.4    20.2    -      -       +      -
    350D  HIS*     4.1    21.1    -      -       +      +
     94F  LEU      4.0     0.6    +      -       -      -
     95F  THR*     1.3    76.5    -      -       +      +
     97F  GLU*     1.3    60.3    +      -       +      +
     99F  GLU*     3.2    20.4    +      -       -      +
    100F  VAL*     2.9    50.0    +      -       +      +
    234F  LYS*     4.4    28.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 97 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    207D  PHE*     3.5    40.4    -      -       +      -
    209D  ARG*     4.2    13.6    +      -       -      +
    349D  PRO*     4.0    40.4    -      -       +      +
    391D  ALA*     4.2    14.7    -      -       +      +
     95F  THR*     3.2    34.9    +      -       -      +
     96F  LEU*     1.3    77.3    +      -       -      +
     98F  GLU*     1.3    58.5    +      -       -      +
    100F  VAL*     3.6     2.1    +      -       -      +
    101F  GLU*     2.9    30.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 98 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    168D  THR*     5.3     6.4    -      -       -      +
    206D  ARG*     4.4    12.3    +      -       -      +
    207D  PHE*     3.5    28.5    -      -       +      -
    392D  SER*     4.6     9.4    +      -       -      -
     93F  LEU      4.3     2.3    -      -       -      +
     94F  LEU*     3.4    21.0    -      -       +      +
     95F  THR*     2.5    52.1    +      -       -      +
     97F  GLU*     1.3    76.7    -      -       -      +
     99F  GLU*     1.3    58.7    +      -       -      +
    101F  GLU*     3.6     2.1    -      -       -      +
    102F  LEU*     2.9    40.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 99 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94F  LEU*     4.0    25.7    -      -       +      +
     95F  THR      3.0    10.6    +      -       -      +
     96F  LEU*     3.5    22.9    -      -       +      +
     98F  GLU*     1.3    76.8    -      -       -      +
    100F  VAL*     1.3    65.1    +      -       +      +
    102F  LEU*     3.8     2.6    -      -       -      +
    103F  ALA*     3.0    25.6    +      -       +      +
    187F  LEU*     4.8     6.9    -      -       +      +
    191F  ASN*     5.0     2.3    -      -       -      +
    227F  PHE*     5.0     6.1    -      -       +      -
    233F  PHE      4.3     1.6    -      -       -      +
    234F  LYS*     3.4    19.0    -      -       -      +
    235F  PHE*     2.7    44.8    +      -       +      +
      6H    T      3.9    17.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 100 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    349D  PRO      4.2    16.6    -      -       -      +
    350D  HIS*     4.0    40.4    -      -       +      +
    351D  MET      5.7     1.3    -      -       -      +
     96F  LEU*     2.9    33.6    +      -       +      +
     97F  GLU      3.8     4.0    -      -       -      +
     99F  GLU*     1.3    76.2    -      -       +      +
    101F  GLU*     1.3    59.3    +      -       -      +
    103F  ALA*     3.4     5.3    +      -       -      +
    104F  ARG*     2.9    32.2    +      -       +      +
    229F  TYR*     3.9    27.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 101 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    206D  ARG*     2.6    38.7    +      -       -      -
    207D  PHE*     3.1    19.6    -      -       +      -
     97F  GLU      2.9    19.2    +      -       -      +
     98F  GLU*     3.6     8.0    -      -       -      +
    100F  VAL*     1.3    77.5    -      -       -      +
    102F  LEU*     1.3    64.9    +      -       -      +
    104F  ARG*     3.3    23.4    +      -       -      +
    105F  LYS*     2.9    63.8    +      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
     94F  LEU*     3.7    38.4    -      -       +      -
     98F  GLU*     2.9    18.1    +      -       +      +
     99F  GLU      3.8     3.4    -      -       -      +
    101F  GLU*     1.3    85.5    -      -       -      +
    103F  ALA*     1.3    63.1    +      -       -      +
    105F  LYS*     3.3     7.1    +      -       +      +
    106F  VAL*     2.9    29.3    +      -       -      +
    183F  ALA*     3.7    34.7    -      -       +      +
    186F  HIS*     4.1    20.4    -      -       +      -
    187F  LEU*     4.0    26.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 103 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99F  GLU*     3.0    18.3    +      -       +      +
    100F  VAL*     3.8     1.8    -      -       -      +
    102F  LEU*     1.3    75.1    -      -       -      +
    104F  ARG*     1.3    58.0    -      -       -      +
    106F  VAL*     3.2     8.0    +      -       -      +
    107F  GLU*     2.9    29.5    +      -       -      +
    187F  LEU*     4.5    10.9    -      -       +      +
    227F  PHE*     3.9    26.3    -      -       +      +
    229F  TYR*     3.7    27.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 104 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    352D  ASN*     3.6    49.1    -      -       -      +
    100F  VAL*     2.9    19.7    +      -       -      +
    101F  GLU*     3.5    33.6    +      -       -      +
    103F  ALA*     1.3    76.7    -      -       -      +
    105F  LYS*     1.3    74.3    +      -       -      +
    107F  GLU*     3.3     1.0    +      -       -      +
    108F  GLU*     2.9    71.6    +      -       +      +
    229F  TYR*     3.6    39.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 105 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101F  GLU*     2.9    52.8    +      -       +      +
    102F  LEU*     3.6     3.4    -      -       +      +
    104F  ARG*     1.3    94.2    -      -       -      +
    106F  VAL*     1.3    56.3    +      -       -      +
    108F  GLU*     3.9     6.7    -      -       -      +
    109F  GLY*     2.9    22.5    +      -       -      -
    176F  ILE*     4.5     1.9    -      -       -      +
    179F  GLU*     3.1    42.9    +      -       +      +
    180F  GLY*     3.3    13.6    +      -       -      -
    183F  ALA*     3.6    26.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 106 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    102F  LEU      2.9    20.7    +      -       -      +
    103F  ALA*     3.2    11.2    +      -       -      +
    105F  LYS*     1.3    74.1    -      -       -      +
    107F  GLU*     1.3    68.1    +      -       -      +
    109F  GLY*     3.0     2.9    +      -       -      -
    110F  MET*     2.9    37.2    +      -       +      +
    180F  GLY*     3.7     8.9    -      -       -      +
    183F  ALA      4.0     1.1    -      -       -      -
    184F  ARG*     3.6    45.1    -      -       +      +
    187F  LEU*     4.7     8.5    -      -       +      -
    224F  VAL*     4.4    19.1    -      -       +      +
    225F  GLU*     5.5     1.8    -      -       -      +
    227F  PHE      6.2     0.2    -      -       -      +
----------------------------------------------------------
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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  ALA      2.9    15.6    +      -       -      +
    104F  ARG      3.8     3.4    -      -       -      +
    106F  VAL*     1.3    78.0    -      -       -      +
    108F  GLU*     1.3    61.4    +      -       +      +
    110F  MET*     3.1    12.3    +      -       +      +
    111F  GLU*     3.0    46.6    +      -       +      +
    227F  PHE      4.0     7.6    -      -       -      +
    228F  GLU*     3.7    33.6    -      -       -      +
    229F  TYR*     3.3    16.1    -      -       +      -
    230F  LYS*     3.2    31.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 108 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    352D  ASN*     5.5     0.5    +      -       -      -
    104F  ARG*     2.9    58.3    +      -       +      +
    105F  LYS*     4.1     4.7    -      -       -      +
    107F  GLU*     1.3    76.4    -      -       +      +
    109F  GLY*     1.3    56.6    +      -       -      +
    111F  GLU*     3.6    19.6    -      -       -      +
    112F  ALA*     2.9    28.6    +      -       -      +
    176F  ILE*     3.5    19.5    -      -       +      +
    229F  TYR*     4.5     5.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 109 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105F  LYS      2.9    17.2    +      -       -      -
    106F  VAL      3.0     5.3    +      -       -      -
    108F  GLU*     1.3    75.1    -      -       -      +
    110F  MET*     1.3    59.9    +      -       -      +
    112F  ALA*     3.1     4.2    +      -       -      +
    113F  ILE*     2.9    33.9    +      -       -      +
    176F  ILE*     3.9    17.2    -      -       -      +
    177F  ALA*     4.0     8.7    -      -       -      +
    180F  GLY*     4.3     4.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with MET 110 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106F  VAL*     2.9    29.7    +      -       +      +
    107F  GLU*     3.1    11.6    +      -       -      +
    109F  GLY*     1.3    72.5    -      -       -      +
    111F  GLU*     1.3    66.8    +      -       +      +
    113F  ILE*     3.0    16.3    +      -       +      +
    114F  LYS*     2.9    26.9    +      -       +      +
    128F  ARG*     6.2     3.4    -      -       -      -
    225F  GLU*     4.1    27.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 111 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107F  GLU*     3.0    38.7    +      -       +      +
    108F  GLU*     3.6    22.2    -      -       -      +
    109F  GLY      3.3     0.2    -      -       -      -
    110F  MET*     1.3    75.6    -      -       +      +
    112F  ALA*     1.3    58.0    +      -       -      +
    114F  LYS*     3.3    10.3    +      -       -      +
    115F  LYS*     2.9    31.8    +      -       +      +
    230F  LYS*     5.2     3.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 112 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108F  GLU      2.9    18.6    +      -       -      +
    109F  GLY      3.1     6.3    +      -       -      +
    111F  GLU*     1.3    75.5    -      -       -      +
    113F  ILE*     1.3    58.0    +      -       -      +
    115F  LYS*     3.3     9.0    +      -       -      +
    116F  LEU*     2.9    34.4    +      -       -      +
    173F  TYR*     3.4    34.4    -      -       +      +
    176F  ILE*     3.7    16.6    -      -       +      -
    177F  ALA      4.1     1.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 113 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109F  GLY      2.9    19.2    +      -       -      +
    110F  MET*     3.0    16.5    +      -       +      +
    112F  ALA*     1.3    75.4    -      -       -      +
    114F  LYS*     1.3    62.2    +      -       +      +
    116F  LEU*     3.3     7.9    +      -       -      +
    117F  SER*     2.9    27.2    +      -       -      -
    124F  PRO*     3.6    30.1    -      -       +      +
    127F  ILE*     4.3    11.0    -      -       +      +
    128F  ARG*     3.7    41.5    -      -       +      +
    131F  VAL*     5.0     5.6    -      -       +      -
    177F  ALA*     3.8    18.8    -      -       +      +
    181F  GLU*     4.8     8.1    -      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
    110F  MET      2.9    16.4    +      -       -      +
    111F  GLU*     3.4    12.1    -      -       -      +
    113F  ILE*     1.3    75.8    -      -       +      +
    115F  LYS*     1.3    58.5    +      -       +      +
    117F  SER*     3.2     7.7    +      -       -      -
    118F  GLU*     2.9    40.2    +      -       -      +
    124F  PRO*     4.8    24.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 115 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111F  GLU*     2.9    16.3    +      -       +      +
    112F  ALA*     3.3    13.0    -      -       -      +
    113F  ILE      3.2     0.2    -      -       -      -
    114F  LYS*     1.3    77.8    -      -       +      +
    116F  LEU*     1.3    56.8    -      -       -      +
    118F  GLU*     3.0    29.6    +      -       +      +
    119F  ILE*     2.9    35.2    +      -       +      +
    173F  TYR*     3.4    46.2    +      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 116 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112F  ALA      2.9    20.3    +      -       -      +
    113F  ILE*     3.3     4.2    +      -       -      +
    115F  LYS*     1.3    75.8    -      -       -      +
    117F  SER*     1.3    57.0    +      -       -      +
    119F  ILE*     3.7    11.2    -      -       +      -
    120F  THR*     2.9    34.3    +      -       -      -
    127F  ILE*     3.7    28.5    -      -       +      +
    131F  VAL*     5.4     0.9    -      -       +      -
    163F  LEU*     4.5    10.8    -      -       +      -
    166F  LEU*     4.4    15.3    -      -       +      -
    170F  HIS      3.7    23.8    -      -       -      +
    173F  TYR*     3.7    14.8    -      -       +      +
    174F  LEU*     3.8    34.3    -      -       +      +
    177F  ALA*     4.8     5.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 117 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    113F  ILE      2.9    13.4    +      -       -      -
    114F  LYS*     3.3    13.5    -      -       -      -
    116F  LEU*     1.3    77.4    -      -       -      +
    118F  GLU*     1.3    62.2    +      -       -      +
    121F  GLY*     3.1    23.8    +      -       -      +
    122F  LEU      3.2    17.3    +      -       -      -
    124F  PRO*     3.3    30.4    -      -       -      +
    127F  ILE*     3.8     8.9    -      -       -      +
----------------------------------------------------------
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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*     2.9    27.2    +      -       -      +
    115F  LYS*     3.0    31.4    +      -       +      +
    117F  SER*     1.3    76.9    -      -       -      +
    119F  ILE*     1.3    64.5    +      -       +      +
    121F  GLY*     4.7     1.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 119 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115F  LYS*     2.9    21.4    +      -       +      +
    116F  LEU*     3.8    13.2    -      -       +      +
    117F  SER      3.2     0.2    -      -       -      -
    118F  GLU*     1.3    81.8    -      -       +      +
    120F  THR*     1.3    68.4    +      -       -      +
    121F  GLY*     3.6     0.3    +      -       -      -
    166F  LEU*     3.9    21.3    -      -       +      -
    170F  HIS*     3.5    57.7    -      -       +      +
    173F  TYR*     4.0    22.0    -      -       +      -
----------------------------------------------------------
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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
----------------------------------------------------------
    116F  LEU      2.9    17.0    +      -       -      -
    119F  ILE*     1.3    76.3    -      -       -      +
    121F  GLY*     1.3    59.1    +      -       -      +
    122F  LEU*     3.7    34.2    -      -       +      +
    127F  ILE*     4.8     0.9    -      -       -      -
    162F  LYS*     4.8    20.4    -      -       +      +
    163F  LEU*     3.7    14.2    -      -       +      +
    166F  LEU*     3.6    26.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 121 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117F  SER      3.1    16.4    +      -       -      -
    118F  GLU      5.2     1.3    -      -       -      -
    119F  ILE      3.4     1.7    -      -       -      -
    120F  THR*     1.3    80.3    -      -       -      +
    122F  LEU*     1.3    67.9    +      -       -      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

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

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