Contacts of the helix formed by residues 116 - 139 (chain L) in PDB entry 5PRC


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 HIS 116 (chain L).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114L  GLY*     3.1    16.1    +      -       -      -
    115L  TRP*     1.3    78.8    +      -       -      +
    117L  VAL*     1.3    57.1    +      -       -      +
    119L  LEU*     3.3    11.3    -      -       +      +
    120L  ALA*     2.9    28.8    +      -       -      +
    234L  LEU*     5.0     6.6    -      -       +      +
      2M  ASP*     4.9     9.0    -      -       +      -
      5M  THR*     3.0    31.9    +      -       +      +
    219M  ALA*     3.5    25.2    -      -       +      +
    222M  LEU*     3.5    40.4    -      -       +      -
    223M  ALA*     3.4    16.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 117 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104L  GLU*     3.9     1.1    -      -       -      +
    108L  SER*     5.5     0.4    -      -       -      +
    113L  ILE*     6.1     1.8    -      -       +      -
    114L  GLY      4.7     1.3    +      -       -      +
    116L  HIS*     1.3    72.3    -      -       -      +
    118L  PRO*     1.3    75.2    -      -       +      +
    119L  LEU      3.1     0.7    -      -       -      -
    120L  ALA*     2.9     5.9    +      -       -      +
    121L  PHE*     2.8    19.8    +      -       -      +
    402L  BPB      3.6    27.5    -      -       +      +
    216M  ALA*     4.3     1.1    -      -       -      +
    219M  ALA*     3.8    18.4    -      -       +      +
    220M  THR*     3.8    29.6    -      -       -      +
    223M  ALA*     5.1     4.7    -      -       +      -
    249M  PHE*     3.7    33.7    -      -       +      -
    250M  TRP*     3.7     9.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with PRO 118 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101L  MET*     3.5    39.8    -      -       +      +
    104L  GLU*     3.2    22.0    -      -       +      +
    105L  VAL*     3.8    28.9    -      -       +      +
    108L  SER*     4.2     9.4    -      -       -      +
    115L  TRP*     3.2    23.3    -      -       +      +
    117L  VAL*     1.3    94.5    -      -       +      +
    119L  LEU*     1.3    60.9    +      -       +      +
    121L  PHE*     3.1     5.1    +      -       +      +
    122L  CYS*     3.1    18.2    +      -       -      -
    249M  PHE*     4.5     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 119 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101L  MET*     6.2     0.9    -      -       -      -
    105L  VAL*     6.3     1.6    -      -       +      -
    115L  TRP*     3.4    27.0    +      -       +      +
    116L  HIS*     3.3    16.4    -      -       +      +
    117L  VAL      3.1     0.2    -      -       -      -
    118L  PRO*     1.3    77.1    -      -       +      +
    120L  ALA*     1.3    65.6    +      -       -      +
    122L  CYS*     2.9    28.1    +      -       +      +
    123L  VAL*     4.0     4.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 120 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116L  HIS      2.9    12.5    +      -       -      +
    117L  VAL      2.9     8.8    +      -       -      +
    119L  LEU*     1.3    75.1    -      -       -      +
    121L  PHE*     1.3    62.7    +      -       -      +
    122L  CYS      3.1     1.6    +      -       -      -
    123L  VAL*     3.2    19.2    +      -       -      +
    124L  PRO*     3.4     7.8    -      -       -      +
    234L  LEU*     3.5    32.3    -      -       +      -
    238L  SER*     4.9     5.0    +      -       -      +
    402L  BPB      3.7    19.9    -      -       +      +
    215M  ALA*     4.2     3.4    -      -       +      +
    219M  ALA*     4.1     7.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 121 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97L  PHE*     3.6    24.7    -      -       +      -
    100L  TRP*     3.7    17.9    -      +       +      -
    101L  MET*     3.9    16.4    -      -       +      -
    104L  GLU*     3.8    18.6    -      -       -      +
    117L  VAL      2.8    12.9    +      -       -      +
    118L  PRO      3.4     9.0    -      -       -      +
    119L  LEU      3.0     0.4    -      -       -      -
    120L  ALA*     1.3    75.1    -      -       -      +
    122L  CYS*     1.3    61.6    +      -       -      +
    124L  PRO*     3.1    18.7    -      -       +      +
    125L  ILE*     3.3    20.4    -      -       +      +
    302L  BCB      4.1    15.0    -      -       +      -
    402L  BPB      3.2    74.7    -      +       +      +
----------------------------------------------------------
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Residues in contact with CYS 122 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101L  MET*     3.8    28.5    -      -       -      -
    118L  PRO      3.1    15.9    +      -       -      -
    119L  LEU*     2.9    21.7    +      -       +      +
    121L  PHE*     1.3    74.8    -      -       -      +
    123L  VAL*     1.3    59.7    +      -       +      +
    125L  ILE*     3.4     9.8    +      -       -      +
    126L  PHE*     2.9    31.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 123 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119L  LEU      4.8     2.9    -      -       -      +
    120L  ALA*     3.2    11.1    +      -       -      +
    122L  CYS*     1.3    77.7    -      -       +      +
    124L  PRO*     1.3    65.7    -      -       +      +
    126L  PHE*     3.2    10.6    -      -       +      +
    127L  MET*     2.9    26.2    +      -       -      +
    238L  SER*     3.6    34.8    -      -       -      +
    241L  PHE*     3.5    27.4    -      -       +      -
    242L  LEU*     4.3    20.6    -      -       +      -
    402L  BPB      3.8    14.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with PRO 124 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    120L  ALA      3.4     8.3    -      -       -      +
    121L  PHE*     3.1    39.0    -      -       +      +
    123L  VAL*     1.3    89.9    -      -       +      +
    125L  ILE*     1.3    54.2    -      -       -      +
    127L  MET*     3.3     2.3    +      -       -      +
    128L  PHE*     2.8    28.9    +      -       -      +
    241L  PHE*     3.7    17.9    -      -       +      -
    302L  BCB      3.7    21.7    -      -       +      +
    402L  BPB      3.6    42.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 125 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94L  LEU*     4.5    13.9    -      -       +      -
     97L  PHE*     3.8    42.4    -      -       +      +
     98L  ILE*     4.3    17.7    -      -       +      +
    101L  MET*     4.0    17.3    -      -       +      -
    121L  PHE*     3.3    37.7    -      -       +      +
    122L  CYS*     3.6     9.4    -      -       -      +
    123L  VAL      3.3     0.6    -      -       -      -
    124L  PRO*     1.3    73.4    -      -       -      +
    126L  PHE*     1.3    65.8    +      -       -      +
    128L  PHE*     3.0    10.0    +      -       -      +
    129L  CYS*     2.9    25.5    +      -       -      -
    302L  BCB      4.2     4.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 126 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122L  CYS*     2.9    14.7    +      -       +      +
    123L  VAL*     3.2    12.3    -      -       +      +
    125L  ILE*     1.3    73.9    -      -       -      +
    127L  MET*     1.3    66.7    +      -       +      +
    129L  CYS*     2.9    19.1    +      -       -      +
    130L  VAL*     2.9    30.8    +      -       +      +
    134L  PHE*     4.0    18.8    -      +       -      -
    241L  PHE      4.8     2.7    -      -       -      -
    242L  LEU*     4.0    28.5    -      -       +      -
    245L  ALA*     3.7    26.7    -      -       +      -
    246L  PHE*     6.0     2.9    -      +       -      -
----------------------------------------------------------
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Residues in contact with MET 127 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123L  VAL      2.9    11.0    +      -       -      +
    124L  PRO      3.7     3.1    -      -       -      +
    126L  PHE*     1.3    75.0    -      -       +      +
    128L  PHE*     1.3    64.7    +      -       -      +
    130L  VAL*     3.0    18.1    +      -       +      +
    131L  LEU*     3.1    28.8    +      -       +      +
    241L  PHE*     3.5    57.2    -      -       +      +
    245L  ALA*     4.1    15.3    -      -       -      -
    248L  THR*     3.5    18.2    -      -       +      +
    302L  BCB      3.4    54.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 128 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90L  THR*     4.5     6.1    -      -       +      -
     93L  ALA*     4.0    17.3    -      -       +      -
     94L  LEU*     3.7    43.1    -      -       +      -
     97L  PHE*     4.0    15.9    -      +       +      -
    124L  PRO      2.8    14.8    +      -       -      +
    125L  ILE*     3.0    12.5    +      -       -      +
    127L  MET*     1.3    77.3    -      -       -      +
    129L  CYS*     1.3    57.8    +      -       -      +
    131L  LEU*     3.6     2.5    +      -       -      +
    132L  GLN*     3.1    48.7    +      -       +      +
    133L  VAL*     5.8     0.4    -      -       +      -
    146L  PHE*     4.3     4.9    -      +       -      -
    148L  TYR*     3.9    16.8    -      -       -      -
    302L  BCB      3.6    12.8    -      -       +      +
    304L  BCB      3.6    35.9    -      -       +      -
    402L  BPB      4.1     8.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 129 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94L  LEU*     3.7    26.9    -      -       -      -
     98L  ILE*     6.4     0.2    -      -       -      -
    125L  ILE*     2.9    19.2    +      -       -      +
    126L  PHE*     2.9    13.2    +      -       -      +
    128L  PHE*     1.3    76.3    -      -       -      +
    130L  VAL*     1.3    60.9    +      -       -      +
    133L  VAL*     2.8    38.7    +      -       +      -
    134L  PHE*     2.9    37.8    +      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 130 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126L  PHE*     2.9    47.8    +      -       +      +
    127L  MET*     3.0    13.4    +      -       +      +
    129L  CYS*     1.3    75.6    -      -       -      +
    131L  LEU*     1.3    62.0    +      -       -      +
    134L  PHE*     3.8    14.4    -      -       +      -
    135L  ARG*     2.9    31.5    +      -       +      +
    245L  ALA*     4.1    20.4    -      -       +      +
    248L  THR*     4.1    17.7    -      -       +      -
    249L  ILE*     3.6    28.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 131 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    127L  MET*     3.1    24.3    +      -       +      +
    128L  PHE*     3.8     3.4    -      -       -      +
    130L  VAL*     1.3    81.0    -      -       -      +
    132L  GLN*     1.3    63.4    +      -       -      +
    135L  ARG*     4.5     6.0    +      -       -      +
    136L  PRO*     3.3    17.7    -      -       -      +
    144L  HIS      4.8     1.7    -      -       -      +
    145L  ALA*     4.1     5.7    -      -       -      -
    146L  PHE*     4.1    23.1    -      -       +      -
    156L  TRP*     3.8    27.5    -      -       +      -
    160L  PHE*     4.9     0.2    -      -       +      -
    248L  THR*     3.9    12.6    -      -       +      -
    302L  BCB      3.7    61.9    -      -       +      +
    304L  BCB      4.2     7.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 132 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86L  TRP*     3.5    12.5    -      -       +      -
     90L  THR*     4.7     5.3    -      -       +      +
    128L  PHE*     3.1    38.2    +      -       +      +
    131L  LEU*     1.3    76.4    -      -       -      +
    133L  VAL*     1.3    68.8    +      -       +      +
    136L  PRO*     3.3    14.5    -      -       -      +
    142L  TRP*     3.6    14.7    -      -       -      -
    145L  ALA*     3.3    10.5    -      -       +      +
    146L  PHE*     2.7    68.1    +      -       +      -
    148L  TYR*     3.0    30.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 133 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90L  THR*     5.1     4.7    -      -       +      -
     94L  LEU*     4.3    24.2    -      -       +      -
    128L  PHE*     5.8     0.2    -      -       +      -
    129L  CYS*     2.8    26.8    +      -       +      +
    131L  LEU      3.7     0.2    -      -       -      -
    132L  GLN*     1.3    85.3    -      -       +      +
    134L  PHE*     1.3    77.7    +      -       +      +
    135L  ARG      3.5     0.4    -      -       -      -
    136L  PRO*     3.6     3.9    -      -       -      +
    137L  LEU*     2.9    43.9    +      -       +      +
    142L  TRP*     4.0    17.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 134 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126L  PHE*     4.0    24.9    -      +       -      -
    129L  CYS*     2.9    37.0    +      -       +      +
    130L  VAL*     3.8    23.8    -      -       +      +
    133L  VAL*     1.3    87.7    -      -       +      +
    135L  ARG*     1.3    57.9    +      -       -      +
    137L  LEU*     3.1    13.3    +      -       +      +
    138L  LEU*     2.8    33.1    +      -       +      +
    249L  ILE*     4.1    13.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 135 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18C  SER*     5.2     3.4    +      -       -      -
    130L  VAL*     2.9    25.1    +      -       +      +
    131L  LEU*     4.5     4.4    +      -       -      +
    134L  PHE*     1.3    73.3    -      -       -      +
    136L  PRO*     1.3    63.6    -      -       +      +
    138L  LEU*     3.2     5.2    +      -       -      +
    139L  LEU*     2.9    50.2    +      -       +      +
    144L  HIS*     4.1    23.6    +      -       -      +
    156L  TRP*     4.7     1.9    -      -       -      -
    160L  PHE*     3.3    38.2    -      -       -      -
    163L  GLN*     5.0     3.0    +      -       -      -
    164L  TYR*     3.3    16.0    +      -       -      -
    248L  THR*     3.5    29.0    +      -       -      +
    249L  ILE*     4.0    16.0    -      -       +      +
    251L  SER      2.8    29.7    +      -       -      -
    253L  PRO*     4.6    11.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with PRO 136 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     75L  LEU*     3.8     2.9    -      -       -      +
    131L  LEU      3.3    22.0    -      -       -      +
    132L  GLN      3.3    23.8    -      -       -      +
    133L  VAL      3.6     8.5    -      -       -      +
    135L  ARG*     1.3    90.1    -      -       +      +
    137L  LEU*     1.3    57.4    +      -       -      +
    139L  LEU*     4.5     0.9    -      -       +      +
    140L  GLY*     2.8    23.2    +      -       -      -
    141L  SER      3.1    30.1    +      -       -      +
    142L  TRP*     4.0    13.0    -      -       +      -
    144L  HIS*     4.4     8.7    -      -       +      -
    145L  ALA*     4.1    20.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 137 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     75L  LEU*     3.8    28.1    -      -       +      +
    133L  VAL*     2.9    35.3    +      -       +      +
    134L  PHE*     3.1    13.9    +      -       +      +
    136L  PRO*     1.3    71.0    -      -       -      +
    138L  LEU*     1.3    71.4    +      -       +      +
    140L  GLY*     3.1    13.3    +      -       -      -
    142L  TRP*     3.8    26.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 138 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      5C  PRO*     5.3    12.1    -      -       +      +
      6C  PRO*     5.5     5.9    -      -       -      +
      7C  ALA      5.9     0.5    +      -       -      -
    134L  PHE*     2.8    19.1    +      -       +      +
    135L  ARG      3.6     6.5    -      -       -      +
    137L  LEU*     1.3    75.1    -      -       +      +
    139L  LEU*     1.3    61.2    +      -       -      +
    140L  GLY*     3.6     0.3    +      -       -      -
    249L  ILE*     3.7    36.3    -      -       +      -
    253L  PRO*     3.7    32.7    -      -       +      +
    254L  PHE*     4.1    11.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 139 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7C  ALA*     4.1    23.2    -      -       +      +
      9C  THR*     4.3    16.4    +      -       +      +
     22C  VAL*     6.4     0.4    -      -       +      -
    135L  ARG*     2.9    52.0    +      -       -      +
    136L  PRO      4.3     0.2    -      -       -      +
    138L  LEU*     1.3    77.6    -      -       -      +
    140L  GLY*     1.3    60.4    +      -       -      +
    141L  SER*     3.5     1.4    +      -       -      -
    144L  HIS*     3.6    41.0    +      -       +      +
    164L  TYR*     5.3     0.2    -      -       -      +
    251L  SER      4.5     0.4    -      -       -      +
    252L  GLY*     3.7    10.3    -      -       -      +
    253L  PRO*     3.6    36.6    -      -       +      -
----------------------------------------------------------
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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