Contacts of the helix formed by residues 122 - 147 (chain D) in PDB entry 3O2Q


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 ASN 122 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86D  ILE*     3.3    51.2    -      -       +      +
     89D  ARG*     4.0     2.9    -      -       -      +
    120D  ASP*     2.9    14.7    +      -       -      +
    121D  GLU*     1.3    80.7    -      -       +      +
    123D  VAL*     1.3    67.2    +      -       -      +
    124D  ASN*     3.1    23.1    +      -       -      +
    125D  VAL*     3.1     8.4    +      -       +      +
    126D  VAL*     3.1    20.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 123 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121D  GLU      3.9     3.9    +      -       -      +
    122D  ASN*     1.3    73.6    +      -       -      +
    124D  ASN*     1.3    67.4    +      -       -      +
    126D  VAL*     3.1    10.0    +      -       +      +
    127D  LYS*     2.8    44.9    +      -       -      +
    176D  ASN*     3.6    30.3    -      -       +      +
    179D  ILE*     3.9    16.8    -      -       +      -
    166E  GLU      5.8     0.2    -      -       -      +
    167E  ASP*     3.2    30.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 124 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86D  ILE*     4.1    14.4    -      -       +      +
     90D  LYS*     4.0    17.3    -      -       +      +
    122D  ASN*     3.1    19.7    +      -       -      +
    123D  VAL*     1.3    81.0    -      -       -      +
    125D  VAL*     1.3    60.7    +      -       -      +
    127D  LYS*     3.3    28.9    +      -       -      +
    128D  LYS*     3.0    29.6    +      -       -      +
    166E  GLU      5.0     8.9    +      -       -      -
    167E  ASP*     5.4     2.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 125 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86D  ILE*     3.7    32.3    -      -       +      +
     89D  ARG*     3.9    20.9    -      -       +      +
     90D  LYS*     4.1     7.4    -      -       +      -
     93D  ILE*     3.5    20.6    -      -       +      +
    117D  LEU*     3.8    15.5    -      -       +      +
    120D  ASP*     3.4    37.9    -      -       +      +
    122D  ASN*     3.1    10.4    +      -       -      +
    124D  ASN*     1.3    75.5    -      -       -      +
    126D  VAL*     1.3    65.3    +      -       -      +
    128D  LYS      3.3     1.2    +      -       -      -
    129D  ALA*     3.0    19.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 126 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117D  LEU      4.2     5.6    -      -       -      -
    118D  LEU*     3.6    28.9    -      -       +      +
    119D  ARG      4.6     0.2    -      -       -      -
    120D  ASP      3.2    31.0    -      -       -      +
    122D  ASN      3.1     9.6    +      -       -      +
    123D  VAL*     3.1    10.9    +      -       +      +
    125D  VAL*     1.3    76.2    -      -       -      +
    127D  LYS*     1.3    64.3    +      -       -      +
    129D  ALA*     3.1     5.8    +      -       -      +
    130D  ILE*     3.0    30.9    +      -       +      +
    171D  LEU*     4.7     8.7    -      -       +      -
    179D  ILE*     3.8    25.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 127 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123D  VAL*     2.8    28.4    +      -       -      +
    124D  ASN*     3.3    29.7    +      -       -      +
    126D  VAL*     1.3    70.5    -      -       -      +
    128D  LYS*     1.3    64.1    +      -       -      +
    130D  ILE*     3.1    10.1    +      -       -      +
    131D  LEU*     3.1    19.2    +      -       -      +
    176D  ASN*     4.8     1.5    +      -       -      +
    178D  GLY*     3.5    16.7    -      -       -      +
    179D  ILE*     3.9    17.0    -      -       +      +
    182D  HIS*     3.5    38.7    -      -       +      +
    167E  ASP*     4.2     9.9    +      -       -      -
    169E  GLU*     2.8    48.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 128 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90D  LYS*     3.7    43.1    -      -       +      +
     93D  ILE*     3.9    17.5    -      -       +      -
     94D  GLY*     4.0    18.0    -      -       -      +
     97D  GLU*     4.0    17.2    +      -       -      -
    124D  ASN      3.0    18.9    +      -       -      +
    125D  VAL      3.6     4.5    -      -       -      +
    127D  LYS*     1.3    76.9    -      -       -      +
    129D  ALA*     1.3    62.7    +      -       -      +
    131D  LEU*     3.2    18.8    +      -       +      +
    132D  THR*     2.9    27.8    +      -       -      -
    132E  GLN*     6.1     1.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 129 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93D  ILE*     3.7    19.7    -      -       +      +
    114D  LEU*     4.6     8.8    -      -       +      +
    117D  LEU*     4.1     0.9    -      -       +      -
    118D  LEU*     3.7    38.8    -      -       +      +
    125D  VAL      3.0    12.1    +      -       -      +
    126D  VAL      3.1     9.2    +      -       -      +
    128D  LYS*     1.3    74.6    -      -       -      +
    130D  ILE*     1.3    57.7    +      -       -      +
    132D  THR*     3.3     3.3    +      -       -      +
    133D  MET*     3.0    31.9    +      -       -      +
    164D  MET*     5.1     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 130 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118D  LEU*     3.7    14.8    -      -       +      -
    126D  VAL*     3.0    22.2    +      -       +      +
    127D  LYS*     3.1     8.5    +      -       -      +
    129D  ALA*     1.3    76.5    -      -       -      +
    131D  LEU*     1.3    57.7    +      -       +      +
    133D  MET*     3.4     3.5    +      -       -      +
    134D  THR*     2.8    30.3    +      -       -      +
    168D  ILE*     3.9    19.5    -      -       +      -
    171D  LEU*     4.1    20.6    -      -       +      -
    179D  ILE*     4.1    15.7    -      -       +      +
    182D  HIS*     3.5    44.2    -      -       +      +
    183D  ALA*     4.2     2.7    -      -       -      +
    186D  PHE*     3.8    15.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 131 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97D  GLU*     4.7     1.5    -      -       -      +
    127D  LYS      3.1    16.5    +      -       -      +
    128D  LYS*     3.2    19.9    +      -       +      +
    130D  ILE*     1.3    73.2    -      -       -      +
    132D  THR*     1.3    66.0    +      -       -      +
    134D  THR*     3.2    16.2    +      -       -      +
    135D  GLN*     3.5    15.8    +      -       -      +
    182D  HIS*     3.7    31.2    -      -       +      +
    185D  LYS*     5.3     4.9    -      -       +      -
    130E  THR*     3.4    25.8    -      -       +      +
    131E  CYS*     3.6    21.5    -      -       +      +
    132E  GLN*     4.0    32.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 132 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93D  ILE*     3.2    26.7    +      -       +      +
     97D  GLU*     2.9    41.1    +      -       +      +
    114D  LEU*     4.0    18.4    -      -       +      -
    128D  LYS*     2.9    14.6    +      -       -      -
    129D  ALA      3.3     7.4    +      -       -      -
    131D  LEU*     1.3    77.7    -      -       -      +
    133D  MET*     1.3    57.7    +      -       -      +
    135D  GLN*     3.2     5.2    +      -       -      +
    136D  LEU*     3.0    41.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 133 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107D  LEU*     6.4     0.2    -      -       -      -
    111D  ILE*     5.0     2.7    -      -       -      -
    114D  LEU*     4.3    19.1    -      -       +      -
    129D  ALA      3.0    17.4    +      -       -      +
    130D  ILE      3.7     5.8    -      -       -      +
    131D  LEU      3.3     0.2    -      -       -      -
    132D  THR*     1.3    74.5    -      -       -      +
    134D  THR*     1.3    60.3    +      -       -      +
    135D  GLN      3.2     0.2    -      -       -      -
    136D  LEU*     3.8     8.3    -      -       -      +
    137D  TYR*     3.0    43.6    +      -       +      +
    161D  VAL*     3.9    37.9    -      -       +      +
    164D  MET*     3.5    44.2    -      -       +      +
    165D  ALA      4.8     2.7    -      -       -      +
    168D  ILE*     3.8    18.8    -      -       +      -
    186D  PHE*     3.4     8.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 134 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130D  ILE*     2.8    19.3    +      -       -      +
    131D  LEU*     3.5    16.7    -      -       -      +
    132D  THR      3.1     0.6    -      -       -      -
    133D  MET*     1.3    78.8    -      -       -      +
    135D  GLN*     1.3    67.7    +      -       -      +
    137D  TYR*     4.8     1.4    +      -       -      +
    138D  LYS*     4.1    18.8    +      -       -      +
    182D  HIS      5.1     0.3    +      -       -      -
    185D  LYS*     4.3    16.7    -      -       +      +
    186D  PHE*     3.2    29.4    +      -       +      +
    189D  GLY*     5.2     8.5    -      -       -      -
    130E  THR      5.4     0.2    -      -       -      -
    131E  CYS*     4.3    22.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 135 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97D  GLU*     3.2    29.4    -      -       +      +
    101D  LYS*     3.5    26.8    +      -       -      +
    131D  LEU      3.5     7.0    +      -       -      +
    132D  THR      3.2     8.1    +      -       -      +
    134D  THR*     1.3    89.4    +      -       -      +
    136D  LEU*     1.3    62.5    +      -       -      +
    137D  TYR      3.5     0.2    -      -       -      -
    138D  LYS*     3.4    32.3    +      -       -      +
    139D  VAL*     3.3    20.5    -      -       -      +
    206D  ARG*     5.2     4.7    +      -       -      -
    129E  GLU      3.1    27.6    +      -       -      +
    130E  THR*     4.3    11.4    +      -       -      +
    131E  CYS*     5.5     2.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 136 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96D  ILE*     4.4     0.7    -      -       +      -
     97D  GLU*     3.8    29.2    -      -       +      +
    100D  CYS*     3.9    31.2    -      -       +      -
    101D  LYS*     4.3    14.8    -      -       +      +
    104D  ILE*     5.1     2.5    -      -       +      +
    107D  LEU*     4.5    12.1    -      -       +      -
    114D  LEU*     3.7    28.7    -      -       +      -
    132D  THR*     3.0    31.8    +      -       +      +
    133D  MET*     3.6     9.6    +      -       +      -
    135D  GLN*     1.3    73.9    -      -       -      +
    137D  TYR*     1.3    56.6    +      -       -      +
    139D  VAL*     2.9    10.0    +      -       +      +
    140D  ALA*     2.7    36.4    +      -       -      +
    161D  VAL*     5.5     1.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 137 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133D  MET*     3.0    25.3    +      -       +      +
    134D  THR      5.1     1.8    -      -       -      +
    136D  LEU*     1.3    76.4    -      -       -      +
    138D  LYS*     1.3    66.3    +      -       +      +
    140D  ALA*     3.3     3.6    +      -       -      +
    141D  LEU*     3.0    39.9    +      -       +      +
    158D  TRP*     3.8    26.8    -      +       -      -
    161D  VAL*     3.7    25.4    -      -       +      -
    162D  SER*     4.4     7.8    +      -       -      -
    165D  ALA*     3.8    30.1    -      -       +      -
    186D  PHE*     4.2     9.6    -      +       +      -
    190D  LEU*     3.4    24.1    -      -       +      +
    193D  THR*     4.5     7.0    -      -       +      -
    194D  LEU*     3.7    27.6    -      -       +      +
    228D  LEU*     4.3     4.2    -      -       -      +
    231D  GLU*     4.7     3.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 138 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134D  THR*     4.1    15.2    +      -       -      +
    135D  GLN*     3.4    37.3    +      -       -      +
    137D  TYR*     1.3    81.2    -      -       +      +
    139D  VAL*     1.3    66.6    +      -       +      +
    141D  LEU*     4.3     4.5    -      -       -      +
    142D  GLN*     3.1    24.3    +      -       -      +
    193D  THR*     4.3    22.2    -      -       +      +
    207D  GLN*     4.6     8.5    +      -       -      +
    210D  ASP*     2.9    38.2    +      -       +      +
    211D  ILE*     3.7    20.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 139 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100D  CYS      4.8     5.8    -      -       -      +
    101D  LYS*     4.7    24.5    -      -       +      +
    104D  ILE*     3.8    24.9    -      -       +      -
    135D  GLN      3.3    18.8    -      -       -      +
    136D  LEU*     2.9    12.1    +      -       +      +
    138D  LYS*     1.3    80.0    -      -       +      +
    140D  ALA*     1.3    67.1    +      -       -      +
    142D  GLN*     3.4    13.7    +      -       -      +
    143D  TRP*     3.1    21.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 140 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104D  ILE*     4.2    11.7    -      -       -      +
    107D  LEU*     3.9    24.0    -      -       +      -
    136D  LEU      2.7    19.0    +      -       -      +
    137D  TYR      3.6     4.0    -      -       -      +
    139D  VAL*     1.3    74.3    -      -       -      +
    141D  LEU*     1.3    62.3    +      -       -      +
    143D  TRP*     3.3     7.0    +      -       +      +
    144D  MET*     2.9    27.1    +      -       +      +
    157D  CYS*     6.1     0.2    -      -       -      -
    158D  TRP*     4.0    17.9    -      -       +      -
    161D  VAL*     4.1     9.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 141 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137D  TYR*     3.0    21.0    +      -       +      +
    138D  LYS*     4.0     5.6    -      -       -      +
    139D  VAL      3.3     0.4    -      -       -      -
    140D  ALA*     1.3    75.6    -      -       -      +
    142D  GLN*     1.3    57.7    +      -       -      +
    144D  MET*     3.3     2.2    +      -       -      -
    145D  VAL*     2.9    50.4    +      -       +      +
    158D  TRP*     3.7    30.5    -      -       +      -
    193D  THR*     4.0    17.5    -      -       +      +
    194D  LEU*     3.9    26.9    -      -       +      -
    211D  ILE*     4.2     8.5    -      -       +      -
    212D  SER      6.2     0.2    -      -       -      -
    216D  ILE*     4.5     7.6    -      -       +      -
    223D  ILE*     4.0    22.7    -      -       +      -
    228D  LEU*     4.1     9.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 142 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    138D  LYS      3.1    17.8    +      -       -      +
    139D  VAL*     3.6    13.0    -      -       -      +
    141D  LEU*     1.3    77.3    -      -       -      +
    143D  TRP*     1.3    62.1    +      -       -      +
    145D  VAL*     3.3     1.2    +      -       -      +
    146D  LYS*     3.0    56.1    +      -       +      +
    209D  HIS      3.4    22.9    +      -       -      +
    210D  ASP*     5.5     1.6    -      -       -      +
    211D  ILE*     4.2    32.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with TRP 143 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104D  ILE*     3.5    47.8    -      -       +      +
    105D  GLU*     3.5    35.4    -      -       +      +
    107D  LEU*     5.1     0.9    -      -       +      -
    108D  LEU*     3.9    23.8    -      -       +      -
    139D  VAL      3.1    13.5    +      -       -      +
    140D  ALA*     3.3    14.3    +      -       +      +
    142D  GLN*     1.3    77.5    -      -       -      +
    144D  MET*     1.3    61.2    +      -       -      +
    146D  LYS*     3.9     5.3    -      -       +      +
    147D  SER*     2.6    43.9    +      -       -      -
    154D  GLN*     3.1    45.8    +      -       +      +
    157D  CYS*     4.7    11.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with MET 144 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140D  ALA*     2.9    21.6    +      -       +      +
    141D  LEU*     3.5     7.9    -      -       -      +
    143D  TRP*     1.3    75.6    -      -       +      +
    145D  VAL*     1.3    61.6    +      -       -      +
    147D  SER      3.3    17.3    +      -       -      +
    150D  ILE*     3.8    30.9    -      -       +      +
    154D  GLN*     3.4    35.0    -      -       -      +
    155D  GLU*     4.3    10.8    -      -       +      -
    158D  TRP*     3.5    50.5    -      -       +      -
    220D  HIS*     3.3     9.8    +      -       -      -
    222D  TYR*     4.7     4.7    -      -       +      -
    223D  ILE*     3.7    22.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 145 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141D  LEU*     2.9    37.3    +      -       +      +
    142D  GLN      4.0     2.7    -      -       -      +
    144D  MET*     1.3    74.5    -      -       -      +
    146D  LYS*     1.3    62.8    -      -       +      +
    147D  SER      3.8     0.2    -      -       -      +
    148D  ARG*     6.0     0.5    -      -       -      +
    211D  ILE*     4.2    17.5    -      -       +      -
    215D  ARG      3.9    22.2    -      -       -      +
    216D  ILE*     3.9    21.8    -      -       +      -
    217D  PRO*     4.1    16.1    -      -       +      +
    220D  HIS*     3.2    23.6    +      -       -      +
    223D  ILE*     4.4     9.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 146 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142D  GLN*     3.0    46.1    +      -       +      +
    143D  TRP*     4.1     4.9    -      -       +      +
    145D  VAL*     1.3    79.9    -      -       +      +
    147D  SER*     1.3    58.7    +      -       -      +
    148D  ARG*     3.5    19.5    +      -       -      +
    211D  ILE*     6.0     2.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 147 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    143D  TRP*     2.6    33.6    +      -       -      -
    144D  MET      3.3     1.0    -      -       -      +
    145D  VAL      3.3     0.8    -      -       -      -
    146D  LYS*     1.3    76.6    -      -       -      +
    148D  ARG*     1.3    68.2    +      -       -      +
    149D  VAL      4.4     5.6    -      -       -      -
    150D  ILE*     3.6    28.3    -      -       -      +
    154D  GLN*     3.5    11.8    +      -       -      -
    220D  HIS*     3.2    27.0    +      -       -      -
----------------------------------------------------------
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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