Contacts of the helix formed by residues 134 - 159 (chain A) in PDB entry 4ZTZ


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 134 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88A  PHE      6.1     0.7    -      -       -      -
    130A  LEU*     5.5     2.6    -      -       -      +
    132A  GLY*     3.9     7.0    +      -       -      -
    133A  ASP*     1.3    80.3    -      -       +      +
    135A  LEU*     1.3    64.3    +      -       +      +
    136A  ASP*     3.5    15.3    +      -       -      +
    137A  GLN*     2.8    38.3    +      -       -      +
    138A  HIS*     3.3    15.6    +      -       -      +
   1166A  TYR*     2.4    49.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 135 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88A  PHE*     5.3    24.9    -      -       +      +
    130A  LEU*     6.6     0.2    -      -       -      -
    134A  ASN*     1.3    76.2    -      -       +      +
    136A  ASP*     1.3    60.2    +      -       -      +
    138A  HIS*     3.5    12.3    -      -       +      -
    139A  PHE*     2.9    41.7    +      -       +      -
   1159A  LEU*     3.6    20.6    -      -       +      +
   1162A  CYS*     3.7    12.1    -      -       +      +
   1163A  MET*     3.5    40.8    -      -       +      +
   1166A  TYR*     3.7    36.3    -      -       +      -
   1171A  ASN*     5.7     1.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 136 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134A  ASN*     3.3    21.9    +      -       -      +
    135A  LEU*     1.3    83.7    -      -       -      +
    137A  GLN*     1.3    61.9    +      -       -      +
    139A  PHE*     3.5     2.3    +      -       -      +
    140A  ARG*     2.9    53.3    +      -       -      +
    420A  HIS*     3.4     8.0    +      -       -      -
   1163A  MET*     3.7     9.5    -      -       -      +
   1166A  TYR*     3.7    13.0    -      -       +      -
   1167A  LYS*     2.8    30.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 137 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132A  GLY      3.2    15.3    -      -       -      +
    133A  ASP*     2.8    37.8    +      -       -      +
    134A  ASN*     2.8    26.1    +      -       -      +
    136A  ASP*     1.3    76.3    -      -       -      +
    138A  HIS*     1.3    59.8    +      -       -      +
    140A  ARG*     3.7    14.1    -      -       -      +
    141A  LEU*     2.9    38.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 138 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129A  PRO      4.1    10.5    -      -       -      -
    130A  LEU*     4.5     7.4    -      -       +      -
    131A  TYR*     3.3    51.3    +      +       -      +
    132A  GLY      4.5     1.0    +      -       -      +
    134A  ASN      3.3     8.6    +      -       -      +
    135A  LEU*     3.2    21.7    +      -       +      +
    136A  ASP      3.1     0.4    -      -       -      -
    137A  GLN*     1.3    78.5    -      -       -      +
    139A  PHE*     1.3    77.3    +      +       -      +
    141A  LEU*     3.8     3.3    -      -       -      +
    142A  LEU*     2.9    58.8    +      -       +      +
   1118A  TRP*     4.1    16.9    +      +       -      -
   1159A  LEU*     4.7    12.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 139 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135A  LEU*     2.9    32.4    +      -       +      +
    136A  ASP      4.0     2.5    -      -       -      +
    138A  HIS*     1.3    90.4    -      +       -      +
    140A  ARG*     1.3    56.6    +      -       -      +
    142A  LEU*     3.7    10.6    -      -       +      +
    143A  ALA*     2.9    31.7    +      -       -      +
    420A  HIS*     5.1     2.0    -      -       +      -
    422A  VAL*     3.8    12.4    -      -       +      +
   1111A  LEU*     3.5    32.3    -      -       +      -
   1114A  VAL*     4.0    13.3    -      -       +      +
   1115A  ALA*     3.6    30.7    -      -       +      -
   1159A  LEU*     3.8    44.9    -      -       +      -
   1160A  THR*     4.5     4.0    -      -       -      -
   1163A  MET*     3.5    18.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 140 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136A  ASP*     2.9    39.1    +      -       -      +
    137A  GLN*     3.8    13.6    -      -       -      +
    138A  HIS      3.1     0.2    -      -       -      -
    139A  PHE*     1.3    74.7    -      -       -      +
    141A  LEU*     1.3    61.7    +      -       +      +
    143A  ALA      3.4     0.7    +      -       -      -
    144A  GLN*     2.9    56.9    +      -       -      +
    419A  PRO      5.0     2.2    +      -       -      -
    420A  HIS*     3.1    43.3    +      -       +      +
    421A  PRO*     3.6    21.7    -      -       +      +
   1167A  LYS*     4.7     2.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 141 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131A  TYR*     4.6    24.7    -      -       +      +
    132A  GLY      4.7     8.3    -      -       -      +
    137A  GLN*     2.9    25.4    +      -       +      +
    138A  HIS*     3.9     2.7    -      -       -      +
    140A  ARG*     1.3    75.2    -      -       +      +
    142A  LEU*     1.3    61.0    +      -       +      +
    144A  GLN*     3.8    20.2    -      -       +      +
    145A  LYS*     2.9    33.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 142 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131A  TYR*     4.5     8.1    -      -       +      -
    138A  HIS*     2.9    54.2    +      -       +      +
    139A  PHE*     3.7    15.0    -      -       +      +
    141A  LEU*     1.3    77.6    -      -       +      +
    143A  ALA*     1.3    57.4    +      -       -      +
    145A  LYS*     3.1    22.5    -      -       +      +
    146A  GLN*     2.9    41.2    +      -       -      +
   1114A  VAL*     5.0     6.5    -      -       +      +
   1115A  ALA*     5.2     1.3    -      -       -      -
   1118A  TRP*     3.5    53.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 143 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    139A  PHE      2.9    19.2    +      -       -      +
    142A  LEU*     1.3    76.2    -      -       -      +
    144A  GLN*     1.3    52.3    +      -       -      +
    146A  GLN*     3.5     3.8    +      -       -      -
    147A  SER*     2.6    38.7    +      -       -      -
    421A  PRO*     3.4    37.0    -      -       +      +
    422A  VAL*     3.4    12.6    -      -       +      +
    425A  ALA*     3.7    13.8    -      -       +      +
   1114A  VAL*     4.7     4.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 144 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140A  ARG*     2.9    43.9    +      -       -      +
    141A  LEU*     3.8    22.2    -      -       +      +
    143A  ALA*     1.3    73.6    -      -       -      +
    145A  LYS*     1.3    57.1    +      -       -      +
    146A  GLN      3.1     4.7    -      -       -      -
    147A  SER*     3.6     4.7    -      -       -      -
    148A  LEU*     2.8    39.5    +      -       +      +
    151A  LEU*     6.5     0.7    -      -       +      -
    421A  PRO*     3.7    17.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 145 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131A  TYR*     6.0     4.3    -      -       +      +
    141A  LEU*     2.9    17.5    +      -       +      +
    142A  LEU*     3.1    35.9    -      -       +      +
    144A  GLN*     1.3    76.4    -      -       -      +
    146A  GLN*     1.3    65.1    +      -       +      +
    148A  LEU*     4.3     7.9    -      -       -      +
    149A  PRO*     4.3     9.5    -      -       -      +
   1118A  TRP*     6.2     0.2    -      -       +      -
   1121A  GLU*     5.6     3.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 146 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142A  LEU*     2.9    25.1    +      -       -      +
    143A  ALA*     3.8     4.0    -      -       -      +
    145A  LYS*     1.3    88.7    -      -       +      +
    147A  SER*     1.3    58.3    +      -       -      +
    148A  LEU      3.5     0.7    -      -       -      -
    149A  PRO*     4.2     2.2    -      -       -      +
    150A  TYR*     3.1    25.3    -      -       -      -
    425A  ALA*     3.9     9.3    -      -       +      +
    428A  LEU*     4.7     1.0    -      -       -      +
   1114A  VAL*     3.3    47.1    +      -       -      +
   1117A  LYS*     3.7    39.3    +      -       +      +
   1118A  TRP*     3.5    25.5    -      -       -      +
   1121A  GLU*     5.7     3.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 147 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    143A  ALA      2.6    23.5    +      -       -      -
    144A  GLN*     3.6     4.7    +      -       -      -
    146A  GLN*     1.3    77.0    -      -       -      +
    148A  LEU*     1.3    59.5    +      -       -      +
    149A  PRO*     3.5     2.5    -      -       -      -
    150A  TYR*     3.6     8.9    +      -       -      +
    151A  LEU*     3.0    34.4    +      -       -      +
    421A  PRO*     4.4     7.3    +      -       -      +
    424A  LEU*     4.5    15.4    -      -       -      +
    425A  ALA*     4.1    12.6    -      -       -      +
    428A  LEU*     3.7    20.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 148 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144A  GLN*     2.8    22.5    +      -       +      +
    145A  LYS*     4.5     6.1    -      -       -      +
    147A  SER*     1.3    75.5    -      -       -      +
    149A  PRO*     1.4    74.1    -      -       +      +
    151A  LEU*     3.2     8.3    +      -       -      +
    152A  GLU*     2.9    59.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with PRO 149 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145A  LYS      4.3     8.3    -      -       -      +
    146A  GLN      4.2     9.9    -      -       -      +
    147A  SER      3.7     1.6    -      -       -      -
    148A  LEU*     1.4    99.9    -      -       +      +
    150A  TYR*     1.3    67.1    +      -       +      +
    152A  GLU*     3.3    15.5    +      -       -      +
    153A  ALA*     2.9    25.0    +      -       -      +
    193A  ARG*     3.5     7.9    +      -       -      +
    262A  GLN*     3.3    42.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 150 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    146A  GLN      3.1    27.6    -      -       -      -
    147A  SER*     3.9     5.8    -      -       -      +
    148A  LEU      3.2     0.4    -      -       -      -
    149A  PRO*     1.3    83.2    -      -       +      +
    151A  LEU*     1.3    60.4    +      -       -      +
    153A  ALA*     4.3     5.2    -      -       -      -
    154A  ALA*     2.9    25.5    +      -       -      +
    262A  GLN      4.8     8.7    +      -       -      -
    263A  GLU      5.4     0.4    -      -       -      -
    264A  GLN      3.2    28.7    -      -       -      -
    265A  LEU*     3.2    26.6    -      -       +      +
    288A  ARG*     2.8    36.2    +      -       -      -
    290A  ARG*     3.4    39.9    +      -       +      +
    292A  LEU*     5.9     1.1    -      -       +      -
    424A  LEU*     6.0     1.3    -      -       +      -
    428A  LEU*     3.7    25.1    -      -       +      -
   1117A  LYS*     4.9     5.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 151 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144A  GLN*     6.5     1.1    -      -       +      -
    147A  SER*     3.0    27.7    +      -       -      +
    148A  LEU*     3.6     7.4    -      -       -      +
    150A  TYR*     1.3    73.9    -      -       -      +
    152A  GLU*     1.3    59.9    +      -       -      +
    154A  ALA*     3.3     4.4    +      -       +      +
    155A  ASN*     2.9    43.7    +      -       -      +
    411A  LEU*     4.7    13.0    -      -       +      -
    415A  LEU*     4.2    26.2    -      -       +      -
    421A  PRO*     6.4     1.3    -      -       +      -
    424A  LEU*     3.6    36.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 152 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    148A  LEU*     2.9    43.5    +      -       +      +
    149A  PRO*     3.3    11.9    +      -       -      +
    151A  LEU*     1.3    76.5    -      -       +      +
    153A  ALA*     1.3    57.0    +      -       -      +
    155A  ASN*     3.2    12.4    +      -       -      +
    156A  LEU*     2.9    33.5    +      -       +      +
    193A  ARG*     3.8    20.1    +      -       -      +
    262A  GLN      5.5     0.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 153 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149A  PRO      2.9    16.3    +      -       -      +
    150A  TYR      3.7     4.9    -      -       -      +
    152A  GLU*     1.3    73.4    -      -       -      +
    154A  ALA*     1.3    60.6    +      -       -      +
    156A  LEU*     3.0    15.9    +      -       -      +
    157A  LEU*     2.9    29.6    +      -       -      +
    193A  ARG*     4.1    15.2    -      -       -      +
    194A  ALA*     3.6    22.6    -      -       +      +
    264A  GLN      5.4     0.9    -      -       -      -
    265A  LEU*     3.7    17.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 154 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    150A  TYR      2.9    17.6    +      -       -      +
    151A  LEU*     3.5    10.8    -      -       +      +
    153A  ALA*     1.3    75.4    -      -       -      +
    155A  ASN*     1.3    59.5    +      -       -      +
    157A  LEU*     3.0     6.1    +      -       -      +
    158A  LEU*     2.9    33.4    +      -       -      +
    265A  LEU*     3.5    10.0    -      -       +      +
    292A  LEU*     6.3     1.6    -      -       +      -
    407A  PHE*     3.7    25.1    -      -       +      -
    411A  LEU*     4.3    18.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 155 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151A  LEU*     2.9    33.1    +      -       -      +
    152A  GLU*     3.5     9.9    -      -       -      +
    154A  ALA*     1.3    75.6    -      -       -      +
    156A  LEU*     1.3    60.0    +      -       +      +
    158A  LEU*     3.5    19.9    -      -       -      +
    159A  GLN*     3.1    35.9    +      -       -      +
    411A  LEU*     4.3     9.9    -      -       -      +
    415A  LEU*     5.5     2.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 156 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    152A  GLU*     2.9    20.1    +      -       +      +
    153A  ALA*     3.0    14.8    +      -       -      +
    155A  ASN*     1.3    78.5    -      -       +      +
    157A  LEU*     1.3    58.8    +      -       -      +
    159A  GLN*     4.0    21.1    +      -       -      +
    160A  ALA*     3.5    13.5    +      -       -      +
    193A  ARG*     4.1    41.1    -      -       +      +
    194A  ALA*     5.5     1.3    -      -       +      -
    217A  PRO*     3.4    26.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 157 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    153A  ALA      2.9    14.1    +      -       -      +
    154A  ALA*     3.0    11.0    +      -       -      +
    156A  LEU*     1.3    78.1    -      -       -      +
    158A  LEU*     1.3    59.4    +      -       -      +
    160A  ALA*     3.3     7.2    -      -       +      +
    194A  ALA*     3.8    27.4    -      -       +      +
    195A  LEU*     4.1    10.8    -      -       -      +
    196A  VAL*     4.7     8.5    -      -       +      +
    215A  ILE*     5.0     2.5    -      -       +      +
    216A  SER*     5.2     0.7    -      -       -      -
    217A  PRO*     3.7    26.5    -      -       +      -
    265A  LEU*     4.8     1.3    -      -       +      -
    267A  VAL*     3.9    28.5    -      -       +      -
    404A  HIS*     3.3    14.5    +      -       +      +
    407A  PHE*     3.8    25.4    -      -       +      -
    408A  GLN*     3.0    21.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 158 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    154A  ALA      2.9    20.1    +      -       -      +
    155A  ASN*     3.1    19.9    +      -       -      +
    157A  LEU*     1.3    74.0    -      -       -      +
    159A  GLN*     1.3    57.6    +      -       -      +
    160A  ALA      3.1     9.2    +      -       -      +
    407A  PHE*     3.7    21.8    -      -       +      -
    408A  GLN*     3.4    43.2    +      -       +      +
    411A  LEU*     3.9    28.7    -      -       +      -
    412A  PRO*     4.4    16.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 159 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    155A  ASN*     3.1    18.4    +      -       -      +
    156A  LEU*     4.0    26.2    -      -       +      +
    158A  LEU*     1.3    74.7    -      -       -      +
    160A  ALA*     1.3    62.8    +      -       -      +
    161A  GLN*     3.3    10.8    +      -       -      +
----------------------------------------------------------
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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