Contacts of the helix formed by residues 117 - 144 (chain B) in PDB entry 4NSW


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 LEU 117 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28B  VAL*     4.1    21.8    -      -       +      -
     31B  LEU*     4.8    14.8    -      -       +      -
     32B  GLU*     3.4    24.5    -      -       +      +
     35B  LEU*     5.8     0.7    -      -       +      -
    112B  LEU*     3.1    23.5    +      -       +      +
    113B  VAL*     4.2     5.6    -      -       +      -
    114B  LYS      3.5     0.6    +      -       -      -
    115B  GLU      3.2     0.6    -      -       -      -
    116B  GLY*     1.3    75.2    -      -       -      +
    118B  ARG*     1.3    63.8    +      -       -      +
    119B  GLY      3.5     1.8    -      -       -      -
    120B  PHE*     3.4    15.4    +      -       +      +
    121B  ARG*     3.1    60.5    +      -       +      +
    180B  ILE*     4.0    26.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 118 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114B  LYS      3.7     8.1    +      -       -      +
    115B  GLU*     3.2    44.0    +      -       -      +
    116B  GLY      3.5     0.4    -      -       -      -
    117B  LEU*     1.3    74.9    -      -       -      +
    119B  GLY*     1.3    66.4    +      -       -      +
    121B  ARG*     3.2    11.0    +      -       +      +
    122B  GLU*     3.0    43.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 119 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115B  GLU      4.8     1.0    +      -       -      -
    116B  GLY      5.2     1.6    +      -       -      -
    117B  LEU      3.5     0.4    -      -       -      -
    118B  ARG*     1.3    75.8    -      -       -      +
    120B  PHE*     1.3    56.9    +      -       -      +
    122B  GLU*     3.3    13.4    +      -       -      +
    123B  ALA*     2.9    31.9    +      -       -      +
    176B  GLN*     3.6    24.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 120 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24B  VAL*     3.9     7.9    -      -       +      -
     25B  GLU*     4.5     6.7    -      -       +      -
     28B  VAL*     3.5    44.6    -      -       +      -
     32B  GLU*     5.7     0.9    -      -       -      -
    117B  LEU*     3.4    25.4    +      -       +      +
    118B  ARG      3.2     0.2    -      -       -      -
    119B  GLY*     1.3    74.6    -      -       -      +
    121B  ARG*     1.3    63.1    +      -       +      +
    124B  ARG*     2.8    49.5    +      -       +      +
    173B  TYR*     3.5    28.3    -      +       -      -
    176B  GLN*     3.9    14.1    -      -       +      +
    177B  ILE*     3.7    28.0    -      -       +      -
    180B  ILE*     3.8    27.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 121 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32B  GLU*     2.7    36.3    +      -       -      +
    113B  VAL*     2.8    22.4    +      -       -      +
    114B  LYS*     3.1    27.3    +      -       -      +
    117B  LEU*     3.1    40.0    +      -       -      +
    118B  ARG*     3.2    10.3    +      -       -      +
    120B  PHE*     1.3    83.0    -      -       +      +
    122B  GLU*     1.3    57.7    +      -       -      +
    124B  ARG*     3.7    10.9    -      -       -      +
    125B  ARG*     3.1    27.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 122 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118B  ARG*     3.0    38.1    +      -       -      +
    119B  GLY*     3.4    15.3    -      -       -      +
    121B  ARG*     1.3    74.5    -      -       -      +
    123B  ALA*     1.3    60.4    +      -       -      +
    125B  ARG*     3.2    31.5    +      -       -      +
    126B  ASP*     2.9    38.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 123 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119B  GLY      2.9    17.9    +      -       -      +
    120B  PHE      4.0     0.4    -      -       -      +
    122B  GLU*     1.3    73.2    -      -       -      +
    124B  ARG*     1.3    67.3    +      -       -      +
    126B  ASP*     3.2     7.3    +      -       -      +
    127B  PHE*     2.8    26.2    +      -       -      +
    169B  ARG*     5.0     1.1    -      -       -      +
    172B  ASP*     4.3     6.5    -      -       +      +
    173B  TYR*     3.8    29.6    -      -       +      +
    176B  GLN*     3.7    20.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 124 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25B  GLU*     3.3    48.0    +      -       -      +
    120B  PHE*     2.8    30.5    +      -       +      +
    121B  ARG*     3.7    11.2    -      -       -      +
    123B  ALA*     1.3    75.0    -      -       -      +
    125B  ARG*     1.3    64.5    +      -       -      +
    127B  PHE*     3.6     1.2    -      -       -      +
    128B  TRP*     3.1    46.2    +      -       +      +
    173B  TYR*     3.4    21.3    -      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
    121B  ARG      3.1    17.8    +      -       -      +
    122B  GLU*     3.2    29.8    +      -       -      +
    124B  ARG*     1.3    82.6    -      -       -      +
    126B  ASP*     1.3    93.0    +      -       -      +
    128B  TRP*     3.5     4.2    +      -       -      +
    129B  ARG*     3.2    54.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 126 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122B  GLU*     2.9    22.9    +      -       -      +
    123B  ALA*     3.9     6.1    -      -       -      +
    125B  ARG*     1.3   105.8    +      -       -      +
    127B  PHE*     1.3    63.3    +      -       -      +
    129B  ARG*     4.2     9.7    +      -       -      -
    130B  GLY      3.1     7.6    +      -       -      -
    169B  ARG*     2.6    50.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 127 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17B  PHE*     3.8    23.1    -      +       -      -
     18B  ARG*     4.3    11.9    -      -       -      -
     21B  ILE*     3.9    15.3    -      -       +      -
    123B  ALA      2.8    17.3    +      -       -      +
    124B  ARG      3.6     2.2    -      -       -      +
    126B  ASP*     1.3    75.2    -      -       -      +
    128B  TRP*     1.3    96.9    +      +       -      +
    130B  GLY*     2.9     4.9    +      -       -      -
    131B  ALA*     2.8    32.3    +      -       +      +
    166B  TYR*     3.6    35.7    -      +       -      -
    169B  ARG*     3.8    16.1    -      -       +      +
    170B  ALA*     3.9    21.5    -      -       +      -
    173B  TYR*     3.6    23.6    -      +       +      -
----------------------------------------------------------
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Residues in contact with TRP 128 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18B  ARG*     3.7    35.2    -      -       -      -
     21B  ILE*     4.0     8.5    -      -       +      -
     22B  GLU*     4.5    16.6    -      -       +      -
     25B  GLU*     2.6    38.9    +      -       -      -
    124B  ARG*     3.1    43.4    +      -       +      +
    125B  ARG*     4.2     3.6    -      -       -      +
    127B  PHE*     1.3    96.3    -      +       -      +
    129B  ARG*     1.3    65.3    +      -       -      +
    131B  ALA*     3.8     9.9    -      -       +      +
    132B  GLU*     3.1    30.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 129 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125B  ARG*     3.2    52.7    +      -       -      +
    126B  ASP*     3.6    12.9    +      -       -      +
    128B  TRP*     1.3    77.9    -      -       -      +
    130B  GLY*     1.3    59.3    +      -       -      +
    132B  GLU*     3.5    10.0    +      -       -      +
    133B  SER*     3.2    23.4    +      -       -      -
    169B  ARG*     4.1    11.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 130 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126B  ASP      3.1    11.4    +      -       -      -
    127B  PHE      2.9     7.7    +      -       -      -
    129B  ARG*     1.3    75.7    -      -       -      +
    131B  ALA*     1.3    57.5    +      -       -      +
    133B  SER*     3.4     7.1    +      -       -      -
    134B  LEU*     2.9    31.5    +      -       -      +
    162B  ALA      4.9     0.5    -      -       -      +
    165B  GLY      5.8     0.2    -      -       -      -
    166B  TYR*     3.8    14.7    -      -       -      +
    169B  ARG*     3.9    16.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 131 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18B  ARG*     3.9    22.4    +      -       -      +
    127B  PHE*     2.8    19.5    +      -       +      +
    128B  TRP*     3.4    18.8    +      -       +      +
    130B  GLY*     1.3    70.4    -      -       -      +
    132B  GLU*     1.3    64.6    +      -       -      +
    134B  LEU*     4.0     2.0    -      -       -      +
    135B  GLU*     3.1    25.6    +      -       -      +
    166B  TYR*     3.6    25.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 132 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128B  TRP*     3.1    21.8    +      -       -      +
    129B  ARG*     3.6     8.3    -      -       -      +
    131B  ALA*     1.3    75.8    -      -       -      +
    133B  SER*     1.3    64.1    +      -       -      +
    135B  GLU*     3.4     5.9    +      -       -      +
    136B  ALA*     3.2    21.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 133 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129B  ARG      3.2    12.1    +      -       -      -
    130B  GLY*     3.7     8.5    +      -       -      -
    132B  GLU*     1.3    79.7    -      -       -      +
    134B  LEU*     1.3    64.5    +      -       -      +
    136B  ALA*     3.5     9.0    +      -       -      +
    137B  ALA*     3.2    21.7    +      -       -      +
    162B  ALA*     4.0    14.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 134 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    254A  GLU*     4.8     1.1    -      -       -      +
     13B  ASP*     4.3     5.4    -      -       -      +
     18B  ARG*     5.9     0.7    -      -       -      +
    130B  GLY      2.9    17.5    +      -       -      +
    131B  ALA*     4.1     3.1    -      -       -      +
    132B  GLU      3.3     0.2    -      -       -      -
    133B  SER*     1.3    77.2    +      -       -      +
    135B  GLU*     1.3    58.5    +      -       -      +
    137B  ALA*     3.0     4.4    +      -       +      -
    138B  LEU*     2.9    49.2    +      -       +      +
    159B  LEU*     4.6     3.6    -      -       +      +
    162B  ALA*     3.9    14.6    -      -       +      +
    163B  ARG*     3.6    53.8    -      -       +      +
    166B  TYR*     3.5    39.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 135 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    285A  ARG*     6.3     2.2    -      -       -      -
    131B  ALA      3.1    19.5    +      -       -      +
    132B  GLU*     3.8     6.2    -      -       -      +
    134B  LEU*     1.3    76.2    -      -       -      +
    136B  ALA*     1.3    58.1    +      -       -      +
    138B  LEU*     4.2    12.8    -      -       +      +
    139B  THR*     3.1    37.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 136 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132B  GLU      3.2    12.7    +      -       -      +
    133B  SER*     3.6    12.3    -      -       -      +
    134B  LEU      3.1     0.6    -      -       -      -
    135B  GLU*     1.3    77.1    -      -       -      +
    137B  ALA*     1.3    58.8    +      -       -      +
    139B  THR*     3.0    18.7    +      -       -      -
    140B  HIS*     3.1    19.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 137 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133B  SER      3.2    11.3    +      -       -      +
    134B  LEU*     3.0    10.1    +      -       +      +
    136B  ALA*     1.3    78.2    -      -       -      +
    138B  LEU*     1.3    59.1    +      -       -      +
    140B  HIS*     4.0     5.7    -      -       -      +
    141B  ASN*     3.0    31.8    +      -       -      +
    155B  ALA      5.0     1.6    -      -       -      +
    158B  ALA*     4.4     5.8    -      -       +      +
    159B  LEU*     3.9    21.3    -      -       -      +
    162B  ALA*     3.7    20.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 138 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    254A  GLU*     3.4    33.2    -      -       -      +
    273A  PHE*     3.5    16.0    -      -       +      -
    285A  ARG*     3.5    31.4    -      -       -      +
    343A  ASP*     3.6    20.1    -      -       -      +
     13B  ASP*     5.7     1.6    -      -       -      +
    134B  LEU*     2.9    40.7    +      -       +      +
    135B  GLU*     4.3    11.0    -      -       +      +
    137B  ALA*     1.3    78.0    -      -       -      +
    139B  THR*     1.3    56.6    +      -       +      +
    141B  ASN*     3.6     2.6    +      -       -      +
    142B  ALA*     3.0    26.7    +      -       -      +
    159B  LEU*     4.2     9.4    -      -       +      +
    163B  ARG*     4.2     3.8    -      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
    273A  PHE*     3.9    24.7    -      -       +      -
    283A  TRP      5.9     1.3    -      -       -      +
    135B  GLU*     3.1    31.2    +      -       +      +
    136B  ALA*     3.0    13.5    +      -       -      -
    138B  LEU*     1.3    73.5    -      -       +      +
    140B  HIS*     1.3    60.9    +      -       -      +
    142B  ALA*     3.1     3.2    +      -       -      +
    143B  GLU*     2.8    51.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 140 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136B  ALA      3.1    16.0    +      -       -      +
    137B  ALA*     4.0     6.1    -      -       -      +
    139B  THR*     1.3    82.1    +      -       -      +
    141B  ASN*     1.3    59.1    +      -       -      +
    143B  GLU*     4.0     4.1    -      -       -      +
    144B  VAL*     3.0    48.5    +      -       +      +
    151B  GLU*     4.2    17.8    +      -       -      +
    155B  ALA*     3.6    34.6    +      -       +      +
    158B  ALA*     5.6     5.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 141 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    326A  ARG*     2.7    54.3    +      -       -      +
    327A  PHE*     4.8     2.1    -      -       -      -
    341A  GLN*     5.0     0.3    -      -       -      +
    343A  ASP*     3.1    26.6    +      -       -      +
    137B  ALA      3.0    19.5    +      -       -      +
    138B  LEU      3.8     3.3    -      -       -      +
    140B  HIS*     1.3    76.1    -      -       -      +
    142B  ALA*     1.3    61.2    +      -       -      +
    144B  VAL      4.3     0.3    +      -       -      -
    155B  ALA*     4.1    11.4    -      -       -      +
    156B  GLY*     3.5    27.9    -      -       -      +
    159B  LEU*     3.5    20.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 142 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    273A  PHE*     3.8    22.7    -      -       +      -
    283A  TRP*     5.9     1.1    -      -       +      -
    325A  ARG*     3.0    15.5    -      -       -      +
    326A  ARG*     4.8     1.2    +      -       -      +
    341A  GLN*     2.9    40.5    -      -       -      +
    342A  ALA      5.8     0.4    -      -       -      +
    343A  ASP*     5.3     1.6    -      -       -      +
    138B  LEU      3.0    18.2    +      -       -      +
    139B  THR*     3.1     5.6    +      -       -      +
    141B  ASN*     1.3    79.9    +      -       -      +
    143B  GLU*     1.3    63.9    +      -       +      +
    144B  VAL      3.3     4.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 143 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    283A  TRP*     4.9    14.3    -      -       +      +
    325A  ARG*     2.6    47.8    +      -       -      +
    139B  THR*     2.8    32.6    +      -       -      +
    140B  HIS*     4.3     4.0    +      -       -      +
    142B  ALA*     1.3    73.4    -      -       +      +
    144B  VAL*     1.3    62.8    +      -       -      +
    145B  PRO*     3.2     6.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 144 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    325A  ARG*     4.6     1.0    -      -       -      -
    326A  ARG*     3.2    34.1    +      -       -      +
    140B  HIS*     3.0    47.3    +      -       +      +
    142B  ALA      3.3     6.5    -      -       -      +
    143B  GLU*     1.3    76.1    -      -       -      +
    145B  PRO*     1.4    80.9    -      -       +      +
    149B  ALA*     4.4     0.7    -      -       +      -
    151B  GLU*     4.3    18.4    -      -       +      +
    152B  ALA*     3.5    31.9    -      -       +      +
    155B  ALA*     4.3     5.4    -      -       +      -
----------------------------------------------------------
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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