Contacts of the helix formed by residues 115 - 141 (chain A) in PDB entry 4G1U


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 ALA 115 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114A  LEU*     1.3    75.0    -      -       -      +
    116A  LEU*     1.3    63.0    +      -       +      +
    117A  TYR      3.0     1.1    -      -       -      -
    118A  SER*     2.5    32.9    +      -       -      +
    119A  HIS*     2.8    20.7    +      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 116 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114A  LEU      4.3     3.5    -      -       -      +
    115A  ALA*     1.3    79.3    -      -       +      +
    117A  TYR*     1.3    58.3    +      -       +      +
    119A  HIS*     3.4    20.2    +      -       +      +
    120A  MET*     2.8    39.0    +      -       +      +
    192A  SER*     4.0    15.7    -      -       -      +
    193A  THR*     3.7    48.7    -      -       +      +
    196A  VAL*     4.6    15.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 117 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114A  LEU*     3.2    44.5    +      -       +      +
    115A  ALA      3.0     0.6    -      -       -      -
    116A  LEU*     1.3    78.1    -      -       +      +
    118A  SER*     1.3    58.8    +      -       -      +
    119A  HIS      3.2     0.4    -      -       -      -
    120A  MET*     4.0    11.2    -      -       +      -
    121A  VAL*     2.9    44.1    +      -       +      +
    196A  VAL*     4.2    31.0    -      -       +      +
    199A  SER*     5.3     3.1    +      -       -      -
    200A  LEU*     5.6    10.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 118 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103A  ILE*     3.6    30.1    -      -       -      +
    114A  LEU      2.8    13.7    +      -       -      -
    115A  ALA*     2.5    22.7    +      -       -      -
    117A  TYR*     1.3    75.9    -      -       -      +
    119A  HIS*     1.3    62.6    +      -       -      +
    121A  VAL*     4.4     2.8    -      -       -      +
    122A  GLY*     2.9    26.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 119 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100A  VAL*     3.9    30.9    -      -       +      +
    103A  ILE*     5.2     5.9    +      -       +      +
    104A  ILE*     4.2    17.4    -      -       +      +
    115A  ALA*     2.8    39.6    +      -       +      -
    116A  LEU*     3.5    22.2    -      -       +      +
    117A  TYR      3.2     0.2    -      -       -      -
    118A  SER*     1.3    80.9    +      -       -      +
    120A  MET*     1.3    61.4    +      -       +      +
    122A  GLY*     5.0     0.2    -      -       -      -
    123A  ALA*     2.9    34.2    +      -       -      +
    181A  TRP*     6.2     0.2    -      +       -      -
    252A  ALA*     3.5    20.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 120 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116A  LEU*     2.8    29.9    +      -       +      +
    117A  TYR*     3.7    15.0    -      -       +      +
    118A  SER      3.4     0.2    -      -       -      -
    119A  HIS*     1.3    77.7    -      -       +      +
    121A  VAL*     1.3    59.4    +      -       +      +
    123A  ALA*     3.8     1.2    -      -       -      +
    124A  PHE*     2.9    32.3    +      -       -      +
    196A  VAL*     4.2    18.6    -      -       +      -
    197A  ALA*     5.0     3.8    -      -       +      +
    200A  LEU*     3.6    32.8    -      -       +      -
    248A  GLY      5.0     2.6    -      -       -      -
    249A  ALA*     3.9    18.6    -      -       -      +
    252A  ALA*     3.5    33.0    -      -       +      +
    253A  VAL*     3.5    26.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 121 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117A  TYR*     2.9    31.0    +      -       +      +
    118A  SER*     4.4     2.9    -      -       -      +
    120A  MET*     1.3    78.9    -      -       +      +
    122A  GLY*     1.3    57.0    +      -       -      +
    124A  PHE*     3.8    11.0    -      -       +      +
    125A  ILE*     2.9    40.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 122 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99A  CYS*     3.2    16.4    -      -       -      +
    100A  VAL*     5.8     0.4    -      -       -      -
    103A  ILE*     4.3    18.4    -      -       -      -
    118A  SER      2.9    20.3    +      -       -      -
    119A  HIS*     3.9     0.4    -      -       -      -
    121A  VAL*     1.3    77.6    -      -       -      +
    123A  ALA*     1.3    56.2    +      -       -      +
    125A  ILE*     3.0     8.8    +      -       -      +
    126A  GLY      3.0    23.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 123 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96A  ALA*     3.2    34.5    +      -       +      +
     99A  CYS*     4.3     0.2    -      -       -      +
    100A  VAL*     3.9     7.1    -      -       +      +
    119A  HIS      2.9    22.7    +      -       -      +
    120A  MET      4.1     0.7    -      -       -      +
    122A  GLY*     1.3    72.1    -      -       -      -
    124A  PHE*     1.3    55.9    +      -       -      +
    127A  SER*     2.9    30.5    +      -       -      -
    248A  GLY*     3.6    24.2    -      -       -      +
    252A  ALA*     3.6    10.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 124 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    120A  MET      2.9    20.4    +      -       -      +
    121A  VAL*     3.8    13.0    -      -       +      +
    123A  ALA*     1.3    75.4    -      -       -      +
    125A  ILE*     1.3    73.9    +      -       +      +
    127A  SER*     4.2     3.8    -      -       -      -
    128A  LEU*     2.9    59.8    +      -       +      +
    241A  LEU*     4.4    11.0    -      -       +      -
    244A  ALA*     4.0    17.0    -      -       +      -
    245A  ILE*     3.7    33.9    -      -       +      +
    248A  GLY*     4.1     7.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 125 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99A  CYS*     4.5     7.9    -      -       -      -
    121A  VAL*     2.9    32.4    +      -       +      +
    122A  GLY*     3.0    10.7    +      -       -      +
    124A  PHE*     1.3    91.6    -      -       +      +
    126A  GLY*     1.3    60.4    +      -       -      +
    128A  LEU*     3.9     7.7    -      -       +      +
    129A  ALA*     2.9    32.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 126 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95A  GLY*     3.9     8.5    -      -       -      -
     96A  ALA      4.0     6.5    +      -       -      -
     99A  CYS*     3.4    24.0    -      -       -      -
    122A  GLY      3.0    11.5    +      -       -      -
    123A  ALA      4.0     1.8    -      -       -      -
    125A  ILE*     1.3    73.7    -      -       -      +
    127A  SER*     1.3    64.9    +      -       -      +
    129A  ALA*     3.3     5.2    +      -       -      +
    130A  ILE*     3.0    30.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 127 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92A  ILE*     3.2    30.1    -      -       -      +
     96A  ALA*     4.0     6.7    -      -       -      +
    123A  ALA      2.9    21.0    +      -       -      -
    124A  PHE      3.8     2.2    -      -       -      -
    126A  GLY*     1.3    75.5    -      -       -      +
    128A  LEU*     1.3    57.2    +      -       -      +
    131A  SER*     2.9    32.7    +      -       -      -
    244A  ALA*     3.2    29.5    +      -       -      -
    247A  ILE*     3.5    10.2    -      -       -      +
    248A  GLY      4.1     5.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 128 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124A  PHE*     2.9    50.1    +      -       +      +
    125A  ILE*     4.0     8.3    -      -       +      +
    127A  SER*     1.3    72.6    -      -       -      +
    129A  ALA*     1.3    62.2    +      -       -      +
    131A  SER*     3.7     2.5    -      -       -      -
    132A  THR*     2.9    39.9    +      -       +      +
    240A  LEU*     5.3     6.6    -      -       +      +
    241A  LEU*     3.9    26.7    -      -       +      -
    244A  ALA*     3.9    17.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 129 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125A  ILE*     2.9    22.4    +      -       +      +
    126A  GLY*     3.6     6.7    -      -       -      +
    127A  SER      3.2     0.2    -      -       -      -
    128A  LEU*     1.3    78.4    -      -       +      +
    130A  ILE*     1.3    68.8    +      -       +      +
    132A  THR*     3.0    11.6    +      -       -      +
    133A  ILE*     3.0    24.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 130 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90A  LEU      4.2     0.2    -      -       -      +
     91A  GLY      3.1    36.3    -      -       -      +
     92A  ILE*     3.8    10.5    -      -       +      +
     95A  GLY*     3.5    21.1    -      -       -      -
    126A  GLY*     3.0    15.4    +      -       -      +
    129A  ALA*     1.3    79.8    -      -       +      +
    131A  SER*     1.3    58.0    +      -       -      +
    133A  ILE*     3.2    12.6    +      -       +      +
    134A  ILE*     2.9    33.6    +      -       +      +
    155A  ILE*     3.5    38.4    -      -       +      -
    159A  CYS*     5.7     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 131 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76A  MET*     4.3     6.9    -      -       -      -
     80A  PHE*     4.4     2.6    -      -       -      -
     92A  ILE*     3.1    29.9    -      -       -      +
    127A  SER      2.9    22.9    +      -       -      -
    128A  LEU*     3.7     6.5    -      -       -      -
    130A  ILE*     1.3    79.0    -      -       -      +
    132A  THR*     1.3    56.0    +      -       -      +
    134A  ILE*     3.5     2.2    +      -       -      +
    135A  PHE*     2.9    30.0    +      -       -      +
    240A  LEU*     3.3    24.5    +      -       -      +
    243A  SER*     4.3     4.7    +      -       -      -
    244A  ALA*     4.9     5.5    -      -       -      +
    247A  ILE*     5.3     0.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 132 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128A  LEU*     2.9    26.8    +      -       +      +
    129A  ALA*     3.0    12.3    +      -       -      +
    131A  SER*     1.3    73.6    -      -       -      +
    133A  ILE*     1.3    68.6    +      -       +      +
    135A  PHE*     3.8     3.3    -      -       -      +
    136A  THR*     3.0    31.9    +      -       -      +
    240A  LEU*     3.6    24.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 133 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129A  ALA      3.0    17.2    +      -       -      +
    130A  ILE*     3.2    18.8    +      -       +      +
    132A  THR*     1.3    82.0    -      -       +      +
    134A  ILE*     1.3    75.7    +      -       +      +
    136A  THR*     3.1     8.9    +      -       -      -
    137A  LEU*     3.0    36.5    +      -       +      +
    155A  ILE*     5.5     9.2    -      -       +      -
    322B  LEU*     5.6    13.9    -      -       +      -
    326B  LEU*     6.0     5.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 134 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80A  PHE*     4.1     5.8    -      -       +      -
     90A  LEU*     3.7    55.0    -      -       +      +
     92A  ILE*     4.9     1.6    -      -       +      -
    130A  ILE*     2.9    25.7    +      -       +      +
    131A  SER*     4.0     4.9    -      -       -      +
    133A  ILE*     1.3    84.7    -      -       +      +
    135A  PHE*     1.3    62.1    +      -       -      +
    137A  LEU*     3.4     4.7    +      -       +      +
    138A  SER*     3.0    23.0    +      -       -      -
    148A  LEU*     3.6    28.0    -      -       +      +
    151A  ALA*     3.6    32.3    -      -       +      -
    155A  ILE*     5.0     2.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 135 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79A  LEU*     4.3    10.3    -      -       +      -
     80A  PHE*     3.5    26.2    -      +       +      -
    131A  SER      2.9    18.8    +      -       -      +
    132A  THR*     3.8     7.4    -      -       -      +
    133A  ILE      3.2     0.2    -      -       -      -
    134A  ILE*     1.3    75.2    -      -       -      +
    136A  THR*     1.3    73.2    +      -       -      +
    138A  SER*     3.3     2.1    +      -       -      -
    139A  ARG*     3.1    61.1    +      -       +      +
    140A  TRP*     5.4     9.9    -      +       -      -
    236A  LYS*     3.5    38.4    -      -       +      -
    237A  LEU*     5.7     7.0    -      -       +      -
    240A  LEU*     4.1    24.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 136 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132A  THR*     3.0    21.2    +      -       -      +
    133A  ILE*     3.4     5.8    -      -       +      +
    135A  PHE*     1.3    85.6    -      -       -      +
    137A  LEU*     1.3    73.6    +      -       +      +
    139A  ARG*     3.4     0.4    +      -       -      -
    140A  TRP*     3.0    61.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 137 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133A  ILE*     3.0    32.7    +      -       +      +
    134A  ILE*     4.0     5.2    -      -       +      +
    135A  PHE      3.3     0.2    -      -       -      -
    136A  THR*     1.3    91.4    -      -       +      +
    138A  SER*     1.3    60.2    +      -       -      +
    139A  ARG      3.7     0.2    +      -       -      -
    140A  TRP*     4.4     0.4    -      -       +      -
    141A  GLY*     3.7    18.6    +      -       -      +
    144A  ASN*     4.9     2.4    -      -       -      +
    147A  ARG*     4.5    26.8    +      -       +      +
    148A  LEU*     4.1    12.5    -      -       +      +
    151A  ALA*     4.8    13.9    -      -       +      -
    322B  LEU*     5.2     4.3    -      -       +      -
    325B  ILE*     4.3    22.9    -      -       +      -
    326B  LEU*     4.0    34.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 138 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80A  PHE*     3.6    27.1    +      -       -      +
    134A  ILE      3.0    16.8    +      -       -      -
    135A  PHE      3.4     5.7    +      -       -      -
    137A  LEU*     1.3    76.9    -      -       -      +
    139A  ARG*     1.3    77.7    +      -       -      +
    141A  GLY      3.5     8.5    -      -       -      +
    142A  HIS      6.1     0.2    -      -       -      -
    143A  GLY*     4.3    13.1    -      -       -      -
    144A  ASN*     5.6     3.6    -      -       -      +
    148A  LEU*     3.6    28.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 139 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79A  LEU*     2.3    52.5    +      -       -      +
     80A  PHE*     5.0     1.1    -      -       -      -
     81A  ARG*     2.8    25.9    -      -       -      +
    135A  PHE*     3.1    44.5    +      -       +      +
    136A  THR      3.9     2.2    -      -       -      +
    138A  SER*     1.3    89.1    +      -       -      +
    140A  TRP*     1.3    84.2    +      -       +      +
    141A  GLY      3.1    11.8    -      -       -      +
    218A  LEU*     5.5     3.4    -      -       -      +
    222A  ASP*     2.5    35.1    +      -       -      +
    236A  LYS*     3.3    22.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 140 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135A  PHE*     5.4     8.9    -      +       -      -
    136A  THR*     3.0    51.4    +      -       +      +
    137A  LEU*     6.5     0.2    -      -       +      -
    139A  ARG*     1.3    95.9    -      -       +      +
    141A  GLY*     1.3    60.9    +      -       -      +
    236A  LYS*     5.3     9.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 141 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137A  LEU*     3.7    11.7    +      -       -      +
    138A  SER      3.5     6.6    -      -       -      +
    139A  ARG      3.1    15.3    -      -       -      +
    140A  TRP*     1.3    78.4    -      -       -      +
    142A  HIS*     1.3    67.8    +      -       -      -
    143A  GLY      3.3     1.7    +      -       -      -
    147A  ARG*     3.6    25.5    -      -       -      +
----------------------------------------------------------
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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