Contacts of the helix formed by residues 119 - 143 (chain B) in PDB entry 1Q6X


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 ASP 119 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117B  PHE*     3.3     4.9    -      -       -      +
    118B  GLN*     1.3    85.0    -      -       -      +
    120B  THR*     1.3    66.4    +      -       -      +
    121B  ASN*     3.2    14.0    +      -       -      +
    122B  ASP*     3.0    35.2    +      -       -      +
    123B  GLN*     3.5     5.9    +      -       -      +
    125B  ARG*     4.8     0.7    +      -       -      -
    324B  ARG*     3.3    16.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 120 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119B  ASP*     1.3    74.2    -      -       -      +
    121B  ASN*     1.3    63.1    +      -       -      +
    123B  GLN*     3.0    14.6    +      -       -      +
    124B  LEU*     2.9    48.4    +      -       +      +
    229B  VAL*     4.7    16.4    -      -       +      -
    324B  ARG*     3.6    26.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 121 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119B  ASP*     3.1    14.1    +      -       -      +
    120B  THR*     1.3    81.9    -      -       -      +
    122B  ASP*     1.3    55.7    +      -       -      +
    124B  LEU*     3.5     7.5    +      -       -      +
    125B  ARG*     3.0    56.8    +      -       -      +
    222B  PHE*     3.7    26.2    -      -       +      -
    226B  ARG*     3.8    27.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 122 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116B  HIS      4.7     2.7    -      -       -      +
    117B  PHE*     3.9    23.6    -      -       +      -
    118B  GLN*     3.2    26.7    +      -       -      +
    119B  ASP*     3.0    24.2    +      -       -      +
    121B  ASN*     1.3    73.2    -      -       -      +
    123B  GLN*     1.3    67.1    +      -       -      +
    125B  ARG*     3.1    24.1    +      -       -      +
    126B  PHE*     3.0    23.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 123 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117B  PHE*     3.6    28.1    -      -       +      -
    119B  ASP      3.5     3.6    +      -       -      +
    120B  THR*     3.0    22.0    +      -       -      +
    122B  ASP*     1.3    80.4    -      -       -      +
    124B  LEU*     1.3    67.2    +      -       +      +
    126B  PHE*     3.3     4.2    +      -       -      +
    127B  ALA*     3.0    26.2    +      -       -      +
    229B  VAL*     5.7     1.0    -      -       -      +
    282B  LEU*     4.0    15.4    -      -       +      +
    283B  ASP      3.8     7.5    +      -       -      -
    322B  VAL*     2.9    37.3    +      -       +      +
    323B  GLY      4.2     0.4    -      -       -      +
    324B  ARG*     3.4    37.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 124 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    120B  THR*     2.9    34.7    +      -       +      +
    121B  ASN*     4.5     5.6    -      -       -      +
    123B  GLN*     1.3    86.7    -      -       -      +
    125B  ARG*     1.3    59.3    -      -       -      +
    127B  ALA*     3.7     3.0    -      -       -      +
    128B  ALA*     2.8    29.8    +      -       -      +
    222B  PHE*     3.7    19.6    -      -       +      -
    225B  LEU*     3.8    14.8    -      -       +      +
    226B  ARG*     3.9    39.9    -      -       +      +
    229B  VAL*     3.9    23.1    -      -       +      -
    282B  LEU*     4.1    20.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 125 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119B  ASP*     4.8     0.6    +      -       -      -
    121B  ASN*     3.0    53.4    +      -       -      +
    122B  ASP*     3.1    31.7    +      -       -      +
    123B  GLN      3.3     0.2    -      -       -      -
    124B  LEU*     1.3    72.6    -      -       -      +
    126B  PHE*     1.3    61.8    +      -       -      +
    128B  ALA*     3.3     5.1    +      -       -      +
    129B  CYS*     2.8    31.1    +      -       -      +
    218B  GLU*     4.1     3.5    -      -       -      +
    222B  PHE*     3.9    25.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 126 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112B  PHE*     4.9    10.1    -      +       -      -
    115B  GLN*     3.4    38.8    -      -       +      -
    117B  PHE*     3.6    17.9    -      +       +      -
    122B  ASP      3.0    13.6    +      -       -      +
    123B  GLN      3.5     8.5    -      -       -      +
    124B  LEU      3.2     0.2    -      -       -      -
    125B  ARG*     1.3    77.4    -      -       -      +
    127B  ALA*     1.3    58.1    +      -       -      +
    129B  CYS*     3.1     7.2    +      -       -      +
    130B  LEU*     2.9    44.9    +      -       +      +
    322B  VAL*     3.9    18.2    -      -       +      -
    328B  CYS*     4.1    18.2    -      -       +      -
    350B  LEU*     5.1     4.9    -      -       +      -
    353B  MET*     3.6    28.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 127 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123B  GLN      3.0    16.5    +      -       -      +
    124B  LEU*     3.7     5.4    -      -       -      +
    125B  ARG      3.3     0.2    -      -       -      -
    126B  PHE*     1.3    78.0    -      -       -      +
    128B  ALA*     1.3    56.3    +      -       -      +
    130B  LEU*     3.1     8.1    +      -       -      +
    131B  ILE*     2.9    34.8    +      -       +      +
    225B  LEU*     4.0    13.5    -      -       +      -
    280B  VAL*     4.5     8.5    -      -       +      -
    282B  LEU*     4.3    14.8    -      -       +      -
    322B  VAL*     4.2    23.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 128 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124B  LEU      2.8    18.9    +      -       -      +
    125B  ARG*     3.6     7.0    -      -       -      +
    127B  ALA*     1.3    75.5    -      -       -      +
    129B  CYS*     1.3    63.1    +      -       -      +
    131B  ILE*     3.4     2.1    +      -       -      -
    132B  SER*     3.1    24.4    +      -       -      -
    218B  GLU*     3.7    28.7    -      -       +      +
    221B  LEU*     3.7    13.8    -      -       +      +
    222B  PHE*     3.9    17.9    -      -       +      +
    225B  LEU*     3.8     8.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with CYS 129 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125B  ARG      2.8    15.4    +      -       -      +
    126B  PHE*     3.5     6.7    -      -       -      +
    128B  ALA*     1.3    76.6    -      -       -      +
    130B  LEU*     1.3    57.7    -      -       -      +
    132B  SER*     3.5     3.5    +      -       -      -
    133B  GLY*     3.0    23.4    +      -       -      -
    218B  GLU*     3.1    32.2    +      -       -      +
    352B  HIS      5.2     0.4    -      -       -      -
    353B  MET*     3.7    46.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 130 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112B  PHE*     4.6    13.2    -      -       +      -
    126B  PHE*     2.9    32.1    +      -       +      +
    127B  ALA*     3.1    10.5    +      -       -      +
    129B  CYS*     1.3    74.9    -      -       -      +
    131B  ILE*     1.3    74.2    +      -       +      +
    133B  GLY*     3.1     3.5    +      -       -      +
    134B  VAL*     3.1    31.3    +      -       +      +
    280B  VAL*     5.1     4.0    -      -       +      -
    320B  PHE*     3.8    47.6    -      -       +      -
    321B  VAL      6.0     0.2    -      -       -      +
    322B  VAL*     4.5    10.5    -      -       +      -
    329B  GLY      6.0     0.2    -      -       -      +
    349B  LEU*     5.0     5.3    -      -       +      +
    350B  LEU*     6.0     0.4    -      -       +      -
    353B  MET*     3.8    21.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 131 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    127B  ALA      2.9    20.3    +      -       -      +
    128B  ALA*     3.4     4.4    +      -       -      +
    130B  LEU*     1.3    80.4    -      -       +      +
    132B  SER*     1.3    63.5    +      -       -      +
    134B  VAL*     3.0    16.3    +      -       +      +
    135B  LEU*     3.0    24.2    +      -       +      +
    196B  VAL*     4.4    21.8    -      -       +      -
    198B  VAL*     5.1     0.2    -      -       +      -
    207B  LEU*     4.1    22.9    -      -       +      -
    209B  VAL*     4.6     2.0    -      -       +      -
    221B  LEU*     4.0    23.8    -      -       +      -
    225B  LEU*     4.6    16.2    -      -       +      -
    280B  VAL*     3.9    35.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 132 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128B  ALA      3.1    17.6    +      -       -      -
    129B  CYS*     3.5     8.5    -      -       -      -
    131B  ILE*     1.3    77.9    -      -       -      +
    133B  GLY*     1.3    61.4    +      -       -      +
    135B  LEU*     3.2     6.0    +      -       -      -
    136B  SER*     3.1     8.8    +      -       -      -
    215B  ARG*     3.0    34.7    +      -       -      +
    216B  LEU      5.5     1.4    +      -       -      -
    217B  SER      5.5     0.2    -      -       -      -
    218B  GLU*     4.6    19.9    +      -       -      +
    221B  LEU*     4.1    13.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 133 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129B  CYS      3.0    14.9    +      -       -      -
    130B  LEU*     3.1     4.7    +      -       -      -
    132B  SER*     1.3    78.5    -      -       -      +
    134B  VAL*     1.3    54.8    +      -       -      +
    136B  SER*     3.4     7.4    +      -       -      -
    137B  TYR*     2.9    24.1    +      -       -      +
    348B  HIS*     5.7     0.7    +      -       -      -
    349B  LEU*     3.1    25.3    -      -       -      +
    352B  HIS*     5.7     7.4    -      -       -      -
    353B  MET*     5.6     2.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 134 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130B  LEU*     3.1    19.5    +      -       +      +
    131B  ILE*     3.0    11.8    +      -       +      +
    133B  GLY*     1.3    74.0    -      -       -      +
    135B  LEU*     1.3    64.4    +      -       +      +
    137B  TYR*     3.4     2.6    +      -       -      +
    138B  LYS*     2.8    28.5    +      -       +      +
    169B  PHE*     3.7    25.9    -      -       +      -
    196B  VAL*     6.1     2.0    -      -       +      -
    277B  ILE*     4.1    18.8    -      -       +      -
    278B  CYS*     4.6     9.4    -      -       -      -
    320B  PHE*     4.1    17.5    -      -       +      -
    349B  LEU*     3.7    28.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 135 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131B  ILE*     3.0    22.3    +      -       +      +
    132B  SER*     3.2    11.0    +      -       -      +
    134B  VAL*     1.3    79.9    -      -       +      +
    136B  SER*     1.3    58.4    +      -       -      +
    138B  LYS*     3.4     8.0    +      -       +      +
    139B  THR*     2.9    31.9    +      -       -      -
    194B  GLU*     5.7     1.3    -      -       -      +
    196B  VAL*     5.3     1.6    -      -       +      -
    209B  VAL*     3.9    46.7    -      -       +      +
    215B  ARG*     3.7    35.9    -      -       +      +
    216B  LEU      4.8     6.1    -      -       -      +
    221B  LEU*     4.9     5.2    -      -       +      -
    277B  ILE*     4.0    15.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 136 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132B  SER*     3.1     7.9    +      -       -      -
    133B  GLY*     3.6    11.3    -      -       -      -
    135B  LEU*     1.3    74.3    -      -       -      +
    137B  TYR*     1.3    65.4    +      -       -      +
    139B  THR*     3.0    15.0    +      -       -      +
    140B  LEU*     3.1    17.3    +      -       -      +
    215B  ARG*     2.9    30.7    +      -       -      +
    348B  HIS*     5.9     1.8    -      -       -      -
    352B  HIS*     5.6     8.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 137 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133B  GLY      2.9    17.9    +      -       -      +
    134B  VAL*     3.8     4.3    -      -       -      +
    136B  SER*     1.3    76.1    -      -       -      +
    138B  LYS*     1.3    62.3    +      -       -      +
    140B  LEU*     3.1    22.1    +      -       +      +
    141B  LEU*     3.2    23.3    +      -       +      +
    146B  LEU*     3.9    20.5    -      -       +      +
    165B  TYR*     3.4    29.9    -      +       -      -
    168B  LEU*     3.9    13.2    -      -       +      -
    169B  PHE*     3.7    20.4    -      +       +      -
    344B  GLN      4.8     0.9    +      -       -      -
    345B  CYS*     3.9    27.3    +      -       -      -
    348B  HIS*     3.3    51.8    -      +       +      +
    349B  LEU*     3.8    13.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 138 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134B  VAL*     2.8    19.0    +      -       +      +
    135B  LEU*     3.7     9.6    -      -       +      +
    136B  SER      3.2     0.2    -      -       -      -
    137B  TYR*     1.3    76.4    -      -       -      +
    139B  THR*     1.3    54.7    +      -       -      +
    141B  LEU*     3.4     6.2    +      -       +      +
    142B  ASP*     2.7    66.3    +      -       -      +
    169B  PHE*     4.1    34.3    -      -       +      -
    170B  SER*     6.5     0.7    -      -       -      -
    194B  GLU*     3.3    29.0    +      -       -      +
    277B  ILE*     4.1    37.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 139 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135B  LEU      2.9    18.2    +      -       -      -
    136B  SER*     3.0    14.1    +      -       -      +
    138B  LYS*     1.3    75.1    -      -       -      +
    140B  LEU*     1.3    68.5    +      -       +      +
    141B  LEU      3.3     0.2    +      -       -      -
    142B  ASP*     3.6     7.4    +      -       -      +
    143B  SER*     3.2    25.7    +      -       -      +
    215B  ARG*     4.2    11.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 140 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136B  SER      3.1    15.9    +      -       -      +
    137B  TYR*     3.1    10.7    +      -       +      +
    139B  THR*     1.3    79.5    -      -       +      +
    141B  LEU*     1.3    60.8    +      -       -      +
    143B  SER*     3.5     3.7    +      -       -      +
    144B  HIS      3.3     2.1    +      -       -      -
    145B  SER*     2.8    48.5    +      -       -      +
    146B  LEU*     3.7    24.5    +      -       +      +
    147B  PRO*     6.3     0.9    -      -       +      -
    348B  HIS*     3.7    31.9    -      -       +      +
    352B  HIS*     5.7     2.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 141 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137B  TYR*     3.2    22.4    +      -       +      +
    138B  LYS*     3.6     8.3    -      -       +      +
    139B  THR      3.2     0.2    -      -       -      -
    140B  LEU*     1.3    76.8    -      -       -      +
    142B  ASP*     1.3    62.4    +      -       -      +
    143B  SER      3.0     1.6    -      -       -      -
    144B  HIS*     2.7    28.2    +      -       -      +
    146B  LEU*     4.1    21.1    -      -       +      -
    165B  TYR*     3.4    41.5    -      -       +      +
    166B  TYR*     3.6    39.9    -      -       +      -
    169B  PHE*     4.0    31.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 142 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    138B  LYS*     2.7    55.8    +      -       -      +
    139B  THR*     4.1     6.8    -      -       -      +
    141B  LEU*     1.3    81.0    -      -       -      +
    143B  SER*     1.3    58.7    +      -       -      +
    144B  HIS*     3.6    13.2    +      -       -      -
    166B  TYR*     5.7     0.9    -      -       -      -
    194B  GLU*     5.4     0.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 143 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18B  TRP*     5.4     1.6    -      -       -      -
    139B  THR*     3.2    18.4    +      -       -      +
    140B  LEU*     3.5     2.1    +      -       -      -
    141B  LEU      3.0     0.8    -      -       -      -
    142B  ASP*     1.3    76.8    -      -       -      +
    144B  HIS*     1.3    71.3    +      -       -      +
    145B  SER*     2.7    27.5    +      -       -      -
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

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

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