Contacts of the helix formed by residues 232 - 257 (chain A) in PDB entry 1Z10


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 GLY 232 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    230A  LEU      3.7     0.2    +      -       -      -
    231A  PRO*     1.3    77.6    -      -       -      +
    233A  PRO*     1.3    67.2    -      -       -      +
    234A  GLN*     3.1     6.3    -      -       -      -
    235A  GLN*     2.8    32.3    +      -       -      +
    236A  GLN*     3.8     2.1    +      -       -      +
     50B  ASN*     3.9    16.8    -      -       -      +
     51B  THR*     4.4     6.5    -      -       -      -
     52B  GLU*     4.6     4.3    -      -       -      +
    215B  SER*     5.6     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with PRO 233 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    211A  PHE*     3.9    19.2    -      -       +      -
    216A  THR*     4.2    19.1    -      -       +      +
    232A  GLY*     1.3    82.0    -      -       -      +
    234A  GLN*     1.3    69.3    +      -       -      +
    236A  GLN*     3.1     7.7    +      -       +      +
    237A  ALA*     3.1    18.4    +      -       -      +
     51B  THR*     4.6     1.6    -      -       -      +
     52B  GLU*     3.3    25.5    -      -       -      +
    215B  SER*     3.0    33.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 234 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    211A  PHE*     3.6    27.8    -      -       +      -
    216A  THR*     4.1     8.0    -      -       -      +
    220A  TYR*     4.0     9.6    -      -       +      -
    227A  MET*     3.0    48.1    +      -       +      +
    230A  LEU*     3.0    23.0    +      -       -      +
    231A  PRO      3.3     9.5    +      -       -      -
    232A  GLY*     3.4    12.7    -      -       -      -
    233A  PRO*     1.3    81.0    -      -       -      +
    235A  GLN*     1.3    57.8    +      -       -      +
    237A  ALA*     3.2     2.8    +      -       -      +
    238A  PHE*     3.0    51.0    +      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 235 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109A  TRP*     5.8     0.5    -      -       -      -
    227A  MET      3.7     2.8    +      -       -      -
    228A  LYS      2.8    30.8    +      -       -      +
    229A  HIS      4.1     1.4    -      -       -      -
    230A  LEU      2.8    31.1    +      -       -      +
    231A  PRO*     4.1     4.0    -      -       +      -
    232A  GLY      2.8    19.0    +      -       -      +
    234A  GLN*     1.3    75.7    -      -       -      +
    236A  GLN*     1.3    63.8    +      -       -      +
    238A  PHE*     3.3    21.8    +      -       -      +
    239A  GLN*     3.1    26.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 236 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    232A  GLY      3.8     1.8    +      -       -      +
    233A  PRO      3.1     9.1    +      -       -      +
    235A  GLN*     1.3    76.0    -      -       -      +
    237A  ALA*     1.3    66.8    +      -       -      +
    239A  GLN*     3.2    14.2    +      -       +      +
    240A  LEU*     3.1    43.2    +      -       -      +
     52B  GLU*     4.3    16.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 237 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106A  THR*     4.8     5.2    -      -       +      -
    208A  ILE*     4.3     5.1    -      -       +      +
    211A  PHE*     3.6    43.1    -      -       +      -
    233A  PRO      3.1     8.0    +      -       -      +
    234A  GLN      3.2     9.6    +      -       -      +
    236A  GLN*     1.3    78.5    -      -       -      +
    238A  PHE*     1.3    65.9    +      -       +      +
    240A  LEU*     2.9    25.4    +      -       +      +
    241A  LEU*     3.1    15.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 238 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106A  THR*     4.9     7.6    -      -       +      -
    109A  TRP*     3.4    70.4    -      +       +      -
    211A  PHE*     5.6     0.2    -      +       -      -
    220A  TYR*     3.3    44.2    -      +       -      -
    228A  LYS*     3.8     9.2    -      -       -      -
    234A  GLN*     3.0    29.6    +      -       +      -
    235A  GLN*     3.4    41.3    -      -       -      +
    237A  ALA*     1.3    79.7    -      -       +      +
    239A  GLN*     1.3    57.4    +      -       +      +
    241A  LEU*     3.3     8.0    +      -       +      +
    242A  GLN*     2.8    30.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 239 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109A  TRP*     5.3     2.8    -      -       -      -
    204A  MET*     5.3     0.2    -      -       -      +
    235A  GLN      3.1    17.2    +      -       -      +
    236A  GLN*     3.6    20.6    -      -       -      +
    237A  ALA      3.2     0.2    -      -       -      -
    238A  PHE*     1.3    79.7    -      -       +      +
    240A  LEU*     1.3    57.7    +      -       -      +
    242A  GLN*     3.6    21.4    -      -       -      +
    243A  GLY*     2.9    25.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 240 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    203A  ARG      4.6     1.8    -      -       -      +
    204A  MET*     3.7    43.9    -      -       +      +
    207A  GLY*     3.7    26.2    -      -       -      +
    208A  ILE*     3.7    13.0    -      -       +      +
    236A  GLN*     3.1    42.8    +      -       -      +
    237A  ALA*     2.9    12.0    +      -       -      +
    239A  GLN*     1.3    77.6    -      -       -      +
    241A  LEU*     1.3    62.8    +      -       -      +
    243A  GLY      3.3     0.9    +      -       -      -
    244A  LEU*     3.1    28.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 241 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106A  THR*     3.3    39.0    -      -       +      +
    107A  PHE*     4.3    14.4    -      -       +      -
    109A  TRP*     4.2    13.9    -      -       +      -
    110A  VAL*     3.9    36.0    -      -       +      +
    208A  ILE*     3.9    30.3    -      -       +      -
    237A  ALA      3.1    12.5    +      -       -      +
    238A  PHE*     3.3     9.4    +      -       +      +
    240A  LEU*     1.3    74.3    -      -       -      +
    242A  GLN*     1.3    59.5    +      -       -      +
    244A  LEU*     3.2     6.8    +      -       +      +
    245A  GLU*     2.9    28.2    +      -       -      +
    296A  LEU*     4.7     2.2    -      -       +      +
    300A  ILE*     4.7     9.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 242 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109A  TRP*     3.9    21.5    -      -       +      -
    110A  VAL*     5.1     0.2    -      -       -      -
    238A  PHE      2.8    18.4    +      -       -      +
    239A  GLN*     3.6    23.6    -      -       -      +
    241A  LEU*     1.3    76.8    -      -       -      +
    243A  GLY*     1.3    57.4    +      -       -      +
    245A  GLU*     4.0    21.8    +      -       -      +
    246A  ASP*     2.7    69.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 243 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    201A  LEU*     4.6     0.7    -      -       -      +
    204A  MET*     3.7    21.6    -      -       -      +
    239A  GLN      2.9    17.8    +      -       -      -
    240A  LEU      3.7     2.7    -      -       -      -
    241A  LEU      3.2     0.4    -      -       -      -
    242A  GLN*     1.3    78.1    -      -       -      +
    244A  LEU*     1.3    60.4    +      -       -      +
    246A  ASP*     3.8     7.3    -      -       -      +
    247A  PHE*     3.1    22.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 244 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    201A  LEU*     3.7    39.7    -      -       +      +
    204A  MET*     3.8    12.1    -      -       +      -
    205A  MET*     4.0    19.7    -      -       +      -
    208A  ILE*     4.1    10.8    -      -       +      -
    240A  LEU      3.1    21.1    +      -       -      +
    241A  LEU*     3.2     8.7    +      -       -      +
    243A  GLY*     1.3    76.9    -      -       -      +
    245A  GLU*     1.3    65.7    +      -       -      +
    247A  PHE*     3.2     5.8    +      -       -      +
    248A  ILE*     3.0    28.6    +      -       -      +
    296A  LEU*     3.7    14.1    -      -       +      -
    299A  PHE*     4.1    16.6    -      -       +      -
    300A  ILE*     4.0    22.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 245 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    110A  VAL*     3.1    25.1    -      -       +      +
    112A  LYS*     6.0     1.2    -      -       -      -
    241A  LEU      2.9    16.4    +      -       -      +
    242A  GLN*     3.8    22.1    +      -       -      +
    244A  LEU*     1.3    78.3    -      -       -      +
    246A  ASP*     1.3    57.2    +      -       -      +
    248A  ILE*     3.2     5.0    +      -       -      +
    249A  ALA*     2.8    31.7    +      -       +      +
    289A  LYS*     4.6     6.6    +      -       -      -
    292A  VAL*     4.0    18.1    -      -       +      +
    293A  MET*     3.7    22.5    -      -       +      +
    296A  LEU*     4.0    10.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 246 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    242A  GLN*     2.7    56.0    +      -       -      +
    243A  GLY*     3.8     7.6    -      -       -      +
    245A  GLU*     1.3    76.6    -      -       -      +
    247A  PHE*     1.3    63.8    +      -       -      +
    249A  ALA*     3.3     6.8    +      -       -      +
    250A  LYS*     3.0    27.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 247 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    187A  PHE*     3.8    18.6    -      +       -      -
    191A  PHE*     3.7    26.2    -      +       -      -
    197A  GLU*     3.5    38.1    -      -       -      -
    201A  LEU*     3.7    33.9    -      -       +      -
    243A  GLY      3.1    12.0    +      -       -      +
    244A  LEU      3.6     7.4    -      -       -      +
    246A  ASP*     1.3    80.9    -      -       -      +
    248A  ILE*     1.3    74.4    +      -       +      +
    250A  LYS*     3.3    15.3    +      -       -      +
    251A  LYS*     3.0    57.1    +      -       +      +
    299A  PHE*     4.6     3.4    -      +       -      -
----------------------------------------------------------
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Residues in contact with ILE 248 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    187A  PHE*     3.7    31.2    -      -       +      -
    244A  LEU      3.0    13.9    +      -       -      +
    245A  GLU*     3.6     6.3    -      -       -      +
    247A  PHE*     1.3    84.5    -      -       +      +
    249A  ALA*     1.3    58.8    +      -       -      +
    251A  LYS*     3.1     5.5    +      -       -      +
    252A  VAL*     2.9    43.1    +      -       +      +
    268A  ILE*     5.3     1.1    -      -       +      -
    292A  VAL*     3.7    28.3    -      -       +      +
    295A  THR*     3.9    22.2    -      -       +      -
    296A  LEU*     4.1    23.8    -      -       +      -
    299A  PHE*     4.2    13.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 249 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    245A  GLU*     2.8    25.0    +      -       +      +
    246A  ASP*     3.3     7.4    +      -       -      +
    248A  ILE*     1.3    73.7    -      -       -      +
    250A  LYS*     1.3    56.9    +      -       -      +
    252A  VAL*     3.6     7.6    +      -       -      +
    253A  GLU*     3.1    44.3    +      -       -      +
    292A  VAL*     4.6    16.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 250 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    197A  GLU*     2.6    37.4    +      -       -      -
    246A  ASP      3.0    15.6    +      -       -      +
    247A  PHE*     3.5    19.1    -      -       +      +
    248A  ILE      3.1     0.2    -      -       -      -
    249A  ALA*     1.3    75.6    -      -       -      +
    251A  LYS*     1.3    70.3    +      -       +      +
    253A  GLU*     3.3    18.0    +      -       -      +
    254A  HIS*     3.2    21.7    +      -       -      +
    257A  ARG*     4.9     3.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 251 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    187A  PHE*     4.2    32.8    +      -       +      +
    189A  ASP*     5.5     4.8    +      -       -      -
    191A  PHE*     5.7     3.8    -      -       -      -
    247A  PHE*     3.0    54.0    +      -       +      +
    248A  ILE      3.1     5.8    +      -       -      +
    250A  LYS*     1.3    80.8    -      -       +      +
    252A  VAL*     1.3    57.6    +      -       -      +
    254A  HIS*     3.5    11.9    +      -       +      +
    255A  ASN*     3.1    39.3    +      -       -      +
    268A  ILE*     4.3    14.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 252 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    248A  ILE*     2.9    35.4    +      -       +      +
    249A  ALA*     3.8     7.0    -      -       -      +
    251A  LYS*     1.3    75.1    -      -       -      +
    253A  GLU*     1.3    59.0    +      -       +      +
    255A  ASN*     3.3     3.1    +      -       -      +
    256A  GLN*     2.9    38.2    +      -       -      +
    268A  ILE*     4.0    26.7    -      -       +      -
    272A  LEU*     4.5     2.5    -      -       +      -
    288A  LEU*     3.8    19.5    -      -       +      -
    291A  LEU*     3.6    34.1    -      -       +      -
    292A  VAL*     4.4     6.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 253 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    249A  ALA*     3.1    34.1    +      -       -      +
    250A  LYS*     3.5    18.4    -      -       -      +
    252A  VAL*     1.3    75.3    -      -       +      +
    254A  HIS*     1.3    63.7    +      -       -      +
    256A  GLN*     3.1    19.8    +      -       -      +
    257A  ARG*     3.1    44.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 254 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    250A  LYS      3.2     9.1    +      -       -      +
    251A  LYS*     3.8    16.5    +      -       +      +
    253A  GLU*     1.3    82.1    -      -       -      +
    255A  ASN*     1.3    75.9    +      -       -      +
    256A  GLN      3.3     0.3    +      -       -      -
    257A  ARG*     3.3    28.8    +      -       -      +
    258A  THR*     2.9    46.8    +      -       +      +
    265A  ARG*     4.6     7.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 255 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    187A  PHE*     5.1     3.8    -      -       -      +
    251A  LYS*     3.1    27.6    +      -       -      +
    252A  VAL      3.7     4.0    -      -       -      +
    254A  HIS*     1.3    85.2    +      -       -      +
    256A  GLN*     1.3    56.4    +      -       -      +
    258A  THR*     3.1     1.6    +      -       -      -
    259A  LEU*     2.9    30.0    +      -       -      +
    265A  ARG*     3.0    17.5    +      -       -      +
    266A  ASP*     3.0    39.6    +      -       -      +
    268A  ILE*     3.7    21.6    -      -       +      +
    269A  ASP*     3.1    17.0    +      -       -      +
    272A  LEU*     4.2     3.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 256 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    252A  VAL*     2.9    19.1    +      -       -      +
    253A  GLU*     3.1    28.9    +      -       -      +
    255A  ASN*     1.3    77.6    -      -       -      +
    257A  ARG*     1.3    58.1    +      -       +      +
    258A  THR      3.2     3.6    +      -       -      -
    259A  LEU*     3.6    13.3    +      -       -      +
    272A  LEU*     3.7    35.4    -      -       +      +
    275A  MET*     4.9     6.3    -      -       -      +
    288A  LEU*     4.6    15.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 257 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    250A  LYS*     4.9     3.6    +      -       -      +
    253A  GLU*     3.1    33.8    +      -       -      +
    254A  HIS*     3.6    39.9    -      -       -      +
    256A  GLN*     1.3    77.8    -      -       +      +
    258A  THR*     1.3    66.3    +      -       +      +
    259A  LEU      3.7     0.2    -      -       -      -
----------------------------------------------------------
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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