Contacts of the helix formed by residues 255 - 276 (chain B) in PDB entry 6UWZ


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 GLU 255 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    237A  THR*     5.8     1.0    -      -       -      +
    240A  GLY*     3.2    20.6    -      -       -      +
    241A  GLU*     3.1     7.4    +      -       -      -
    242A  LYS*     3.1    14.1    +      -       -      +
    243A  MET*     2.8    52.6    +      -       +      +
    244A  THR*     3.7     7.1    +      -       -      +
    296A  ILE*     3.9     8.8    -      -       -      +
    249B  LEU*     3.3     9.1    -      -       +      +
    253B  SER*     2.6    29.6    +      -       -      +
    254B  GLY*     1.3    79.3    -      -       -      +
    256B  LYS*     1.3    58.5    +      -       -      +
    257B  MET      3.6     1.3    -      -       -      -
    258B  SER*     4.1     6.1    -      -       -      -
    259B  THR*     2.3    35.3    +      -       -      -
    247C  GLU*     3.8     4.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 256 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    246B  ALA*     4.0    15.6    +      -       -      +
    249B  LEU*     2.5    44.3    +      -       +      +
    250B  PRO*     4.4     0.4    -      -       -      +
    251B  ALA*     4.1    20.0    -      -       +      +
    253B  SER      4.4     8.5    -      -       -      +
    255B  GLU*     1.3    75.3    -      -       -      +
    257B  MET*     1.3    70.0    +      -       +      +
    259B  THR*     3.2     5.5    +      -       -      -
    260B  ALA*     3.0    23.9    +      -       -      +
    306B  CYS*     4.2    33.2    -      -       +      +
    309B  VAL*     4.6     9.1    -      -       +      +
    310B  LEU*     4.2    17.9    -      -       +      -
    454B  ASP*     2.4    34.7    +      -       -      -
    247C  GLU*     3.8     1.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 257 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    256B  LYS*     1.3    72.2    -      -       -      +
    258B  SER*     1.3    55.6    +      -       -      +
    260B  ALA*     4.5     4.0    -      -       -      +
    261B  ILE*     2.7    48.4    +      -       +      +
    303B  ILE*     3.3    37.5    -      -       +      +
    306B  CYS*     3.4    25.1    -      -       -      -
    307B  GLY*     3.6    13.2    -      -       -      +
    310B  LEU*     3.5    20.4    -      -       +      -
    237C  LEU*     4.1     8.5    -      -       +      -
    241C  LEU*     4.1     9.6    -      -       +      -
    247C  GLU*     3.0    39.7    +      -       +      +
    250C  SER*     5.6     0.2    -      -       -      -
    251C  LEU*     4.2     6.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 258 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    243A  MET*     6.0     1.3    -      -       -      -
    244A  THR*     5.1    14.9    +      -       -      -
    247A  ILE*     5.4     1.3    -      -       -      -
    254B  GLY      4.1     0.9    +      -       -      -
    255B  GLU*     4.1    11.9    -      -       -      -
    256B  LYS      3.3     0.2    -      -       -      -
    257B  MET*     1.3    72.7    -      -       -      +
    259B  THR*     1.3    64.0    +      -       -      +
    261B  ILE*     3.4    10.2    -      -       -      +
    262B  SER*     2.9    33.3    +      -       -      -
    247C  GLU*     2.4    37.0    +      -       -      -
    250C  SER*     3.6    13.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 259 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    243A  MET*     4.0    21.3    -      -       +      +
    247A  ILE*     4.1    25.6    -      -       +      +
    289A  ILE*     5.6     1.3    -      -       +      -
    293A  VAL*     5.9     2.5    -      -       +      -
    242B  LEU*     4.5    11.2    -      -       +      +
    243B  ALA*     5.3     0.2    -      -       -      -
    245B  LEU*     6.3     0.7    -      -       +      -
    246B  ALA*     4.1    21.8    -      -       +      -
    249B  LEU*     3.8    10.1    -      -       +      +
    255B  GLU      2.3    25.3    +      -       -      -
    256B  LYS*     3.2     5.1    +      -       -      -
    258B  SER*     1.3    78.2    -      -       -      +
    260B  ALA*     1.3    63.1    +      -       -      +
    262B  SER*     3.8     1.6    -      -       -      -
    263B  VAL*     3.0    31.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 260 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    243B  ALA*     4.9     5.2    -      -       +      +
    246B  ALA*     4.9     4.9    -      -       +      -
    256B  LYS      3.0    15.6    +      -       -      +
    257B  MET*     4.0     3.8    -      -       -      +
    259B  THR*     1.3    77.6    -      -       -      +
    261B  ILE*     1.3    57.4    +      -       -      +
    263B  VAL*     3.2    10.1    +      -       -      +
    264B  LEU      3.0    22.0    +      -       -      -
    299B  VAL*     3.5    11.9    -      -       +      +
    302B  VAL*     4.3    19.5    -      -       +      -
    303B  ILE*     3.3    28.3    -      -       +      -
    306B  CYS*     5.1     2.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 261 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    257B  MET      2.7    30.6    +      -       -      +
    258B  SER*     3.4     7.2    -      -       -      +
    260B  ALA*     1.3    72.8    -      -       -      +
    262B  SER*     1.3    65.3    +      -       -      +
    264B  LEU*     3.2     5.3    +      -       +      +
    265B  LEU*     2.9    31.5    +      -       -      +
    303B  ILE*     3.7    25.6    -      -       +      -
    234C  LEU*     4.9     4.0    -      -       +      -
    250C  SER*     3.2    32.8    -      -       -      +
    251C  LEU*     3.3    31.6    -      -       +      +
    254C  SER*     3.2    32.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 262 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    247A  ILE*     3.1    33.8    -      -       -      +
    250A  LEU*     6.0     0.7    -      -       -      -
    251A  LEU*     3.4    20.9    -      -       -      +
    258B  SER*     2.9    21.7    +      -       -      -
    259B  THR      3.8     0.4    -      -       -      -
    261B  ILE*     1.3    77.5    -      -       -      +
    263B  VAL*     1.3    63.5    +      -       -      +
    265B  LEU*     3.1    14.9    +      -       -      +
    266B  ALA*     2.9    19.4    +      -       -      +
    254C  SER*     5.6     0.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 263 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    247A  ILE*     5.0     5.6    -      -       +      -
    250A  LEU*     5.9     1.8    -      -       +      -
    239B  ILE*     3.3    43.7    -      -       +      +
    242B  LEU*     4.2    10.5    -      -       +      -
    243B  ALA*     3.4    31.4    -      -       +      +
    259B  THR*     3.0    21.9    +      -       +      +
    260B  ALA      3.2     7.8    +      -       -      +
    262B  SER*     1.3    77.2    -      -       -      +
    264B  LEU*     1.3    57.5    +      -       -      +
    266B  ALA*     3.2     4.4    +      -       -      +
    267B  GLN*     2.9    41.9    +      -       -      +
    299B  VAL*     4.2     2.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 264 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260B  ALA      3.0    13.3    +      -       -      +
    261B  ILE*     3.5    11.4    -      -       -      +
    262B  SER      3.2     0.4    -      -       -      -
    263B  VAL*     1.3    77.7    -      -       -      +
    265B  LEU*     1.3    56.4    +      -       -      +
    267B  GLN*     3.3    22.5    +      -       -      +
    268B  ALA*     2.9    27.0    +      -       -      +
    296B  MET*     3.5    40.2    -      -       +      +
    299B  VAL*     3.8    11.2    -      -       +      -
    300B  THR*     4.0    11.2    -      -       -      +
    303B  ILE*     4.3     4.7    -      -       +      -
    230C  LEU*     5.4     4.0    -      -       +      -
    231C  ILE*     4.5    13.9    -      -       +      -
    234C  LEU*     3.9    28.3    -      -       +      -
    258C  ALA*     6.0     2.0    -      -       +      -
    262C  PHE*     6.5     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 265 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    251A  LEU*     4.2    20.4    -      -       +      -
    261B  ILE      2.9    18.7    +      -       -      +
    262B  SER*     3.1    17.2    +      -       -      +
    264B  LEU*     1.3    74.1    -      -       -      +
    266B  ALA*     1.3    65.6    +      -       -      +
    268B  ALA*     3.1     6.9    +      -       +      +
    269B  VAL*     2.9    28.1    +      -       +      +
    254C  SER*     3.6    41.7    -      -       -      +
    257C  LEU*     4.3    21.5    -      -       +      -
    258C  ALA*     3.7    24.9    -      -       +      +
    261C  VAL*     5.3     5.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 266 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    250A  LEU*     4.5     2.5    -      -       +      -
    251A  LEU*     3.8    15.3    -      -       +      +
    254A  THR*     4.3    11.4    -      -       +      +
    239B  ILE*     3.9    31.4    -      -       +      -
    262B  SER      2.9    12.7    +      -       -      +
    263B  VAL      3.5     7.9    -      -       -      +
    265B  LEU*     1.3    76.1    -      -       -      +
    267B  GLN*     1.3    57.3    +      -       -      +
    269B  VAL*     3.1     9.6    +      -       -      +
    270B  PHE*     2.9    34.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 267 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    236B  CYS*     3.7    19.1    -      -       -      +
    239B  ILE*     5.4     2.9    -      -       +      -
    240B  SER*     2.5    37.0    +      -       -      +
    263B  VAL*     2.9    17.5    +      -       +      +
    264B  LEU*     3.4    31.7    -      -       -      +
    265B  LEU      3.2     0.2    -      -       -      -
    266B  ALA*     1.3    75.4    -      -       -      +
    268B  ALA*     1.3    57.8    +      -       -      +
    270B  PHE*     3.3     9.0    +      -       +      +
    271B  LEU*     2.9    28.4    +      -       -      +
    292B  LEU*     4.0     4.9    -      -       +      +
    295B  ILE*     3.5    17.2    -      -       +      +
    296B  MET*     3.6    18.1    -      -       +      +
    299B  VAL*     3.5    20.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 268 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    264B  LEU*     2.9    13.6    +      -       +      +
    265B  LEU*     3.1    12.5    +      -       +      +
    267B  GLN*     1.3    75.0    -      -       -      +
    269B  VAL*     1.3    60.0    +      -       -      +
    271B  LEU*     3.3     5.4    +      -       -      +
    272B  LEU*     2.9    28.1    +      -       -      +
    296B  MET*     3.7    12.3    -      -       +      +
    258C  ALA*     5.0     5.6    -      -       +      -
    261C  VAL*     4.1    16.7    -      -       +      +
    262C  PHE*     3.7    28.6    -      -       +      -
    265C  LEU*     5.0     1.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 269 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    251A  LEU*     5.9     2.5    -      -       +      -
    254A  THR*     3.8    30.3    -      -       +      +
    255A  VAL*     4.9    12.6    -      -       +      +
    258A  LEU*     3.8    27.1    -      -       +      -
    265B  LEU*     2.9    21.3    +      -       +      +
    266B  ALA*     3.1     9.4    +      -       -      +
    268B  ALA*     1.3    77.0    -      -       -      +
    270B  PHE*     1.3    57.6    +      -       -      +
    272B  LEU*     3.1     9.7    +      -       +      +
    273B  LEU*     3.0    31.0    +      -       +      +
    261C  VAL*     4.8    14.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 270 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    254A  THR*     3.7    24.9    -      -       +      -
    257A  LEU*     3.4    26.9    -      -       +      -
    282A  MET*     5.0     0.9    -      -       +      -
    231B  ASN      3.8    10.5    -      -       -      -
    232B  PHE*     4.1    19.1    -      +       +      +
    235B  PRO*     3.6    24.2    -      -       +      -
    236B  CYS*     3.8    28.0    -      -       +      -
    239B  ILE*     3.7    21.5    -      -       +      -
    266B  ALA*     2.9    29.0    +      -       +      -
    267B  GLN*     3.7     5.8    -      -       +      +
    268B  ALA      3.3     0.2    -      -       -      -
    269B  VAL*     1.3    72.8    -      -       -      +
    271B  LEU*     1.3    57.0    +      -       -      +
    273B  LEU*     3.3    14.9    +      -       +      +
    274B  THR*     2.7    38.8    +      -       -      +
    292B  LEU*     4.2     5.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 271 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    267B  GLN      2.9    14.7    +      -       -      +
    268B  ALA*     3.4     7.2    -      -       -      +
    270B  PHE*     1.3    75.8    -      -       -      +
    272B  LEU*     1.3    57.4    +      -       -      +
    274B  THR*     3.3     1.7    +      -       -      -
    275B  SER*     2.9    29.1    +      -       -      -
    289B  GLY*     5.5     0.4    -      -       -      -
    292B  LEU*     3.9    23.1    -      -       +      +
    293B  MET*     3.6    23.3    -      -       +      -
    296B  MET*     4.0    13.9    -      -       +      -
    222C  VAL*     4.9     0.9    -      -       +      -
    223C  TYR*     3.4    42.7    -      -       +      +
    227C  PRO*     3.5    31.4    -      -       +      -
    262C  PHE*     4.7     6.1    -      -       +      -
    265C  LEU*     4.1     8.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 272 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    258A  LEU*     4.0    23.6    -      -       +      -
    268B  ALA      2.9    13.0    +      -       -      +
    269B  VAL*     3.1    10.3    +      -       +      +
    271B  LEU*     1.3    77.6    -      -       -      +
    273B  LEU*     1.3    64.4    +      -       +      +
    275B  SER*     2.8    19.3    +      -       -      +
    276B  GLN*     3.3    24.8    -      -       -      +
    261C  VAL*     4.4    14.8    -      -       +      -
    264C  LEU*     3.6    28.9    -      -       +      -
    265C  LEU*     3.5    43.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 273 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    254A  THR      5.3     0.2    -      -       -      +
    257A  LEU*     4.7     8.3    -      -       +      -
    258A  LEU*     3.4    56.5    -      -       +      +
    261A  VAL*     4.6    16.3    -      -       +      +
    232B  PHE*     3.5    26.0    -      -       +      -
    269B  VAL*     3.0    22.3    +      -       +      +
    270B  PHE*     3.3    22.4    +      -       +      +
    272B  LEU*     1.3    78.1    -      -       +      +
    274B  THR*     1.3    60.8    +      -       -      +
    276B  GLN*     3.5    24.5    +      -       -      +
    277B  ARG*     3.4    19.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 274 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137B  PHE*     4.9     2.5    -      -       +      -
    232B  PHE*     3.8    18.1    -      -       +      -
    270B  PHE*     2.7    21.8    +      -       -      +
    271B  LEU      3.6     4.5    -      -       -      -
    272B  LEU      3.2     0.2    -      -       -      -
    273B  LEU*     1.3    73.4    -      -       -      +
    275B  SER*     1.3    64.9    -      -       -      +
    276B  GLN      3.1     2.5    -      -       -      -
    277B  ARG*     3.0    14.2    +      -       -      -
    278B  LEU*     3.5    18.6    -      -       +      +
    288B  ILE*     3.5    35.0    -      -       +      +
    292B  LEU*     3.6    18.2    -      -       +      +
    223C  TYR*     3.6    17.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 275 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    271B  LEU      2.9    13.9    +      -       -      -
    272B  LEU*     2.8    20.4    +      -       -      +
    274B  THR*     1.3    76.9    -      -       -      +
    276B  GLN*     1.3    56.4    +      -       -      +
    277B  ARG      3.3     2.2    +      -       -      -
    278B  LEU      4.0     5.4    -      -       -      +
    219C  PHE*     3.4    27.4    -      -       -      -
    223C  TYR*     3.6    24.9    -      -       -      -
    265C  LEU*     3.3    30.5    +      -       -      +
    269C  LYS*     3.4    14.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 276 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    261A  VAL*     5.6     6.1    -      -       -      +
     48B  THR*     5.0     7.6    -      -       -      +
    272B  LEU*     3.3    32.4    -      -       -      +
    273B  LEU*     3.5    23.2    +      -       -      +
    275B  SER*     1.3    78.9    +      -       -      +
    277B  ARG*     1.3    67.7    +      -       +      +
    278B  LEU      3.9     2.0    -      -       -      -
    268C  ASP*     4.8    17.7    -      -       -      +
    269C  LYS*     4.8     4.7    -      -       -      +
----------------------------------------------------------
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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