Contacts of the helix formed by residues 239 - 264 (chain C) in PDB entry 3GTL


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 PRO 239 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15C  LYS*     4.7     7.4    -      -       +      +
     73C  GLN*     4.6     4.3    -      -       -      +
     75C  MET*     4.5    28.7    -      -       +      -
    234C  SER*     4.8     1.6    -      -       -      +
    236C  GLY*     4.1     6.3    -      -       -      +
    237C  SER      4.2     4.7    -      -       -      +
    238C  ILE*     1.4    87.5    -      -       +      +
    240C  VAL*     1.3    71.9    +      -       +      +
    241C  ASP*     2.9     8.2    +      -       -      +
    242C  GLN*     2.9    32.5    +      -       +      +
    243C  VAL*     5.2     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 240 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14C  SER      3.4    13.5    -      -       -      +
     15C  LYS*     3.3    25.3    +      -       -      +
     16C  ASP*     3.1    37.2    -      -       -      +
     17C  ASN      3.3     1.3    -      -       -      +
     18C  VAL*     3.1    27.8    -      -       +      +
    232C  VAL*     3.5     5.7    -      -       +      +
    234C  SER*     3.8    16.0    +      -       -      -
    238C  ILE      3.8     3.0    +      -       -      -
    239C  PRO*     1.3    72.4    -      -       +      +
    241C  ASP*     1.3    69.0    +      -       -      +
    243C  VAL*     3.0    19.1    +      -       -      +
    244C  VAL*     3.3    14.1    -      -       -      +
    109K  TRP*     3.8    11.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 241 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    239C  PRO*     2.9    13.1    +      -       -      +
    240C  VAL*     1.3    78.8    -      -       -      +
    242C  GLN*     1.3    85.9    +      -       -      +
    244C  VAL*     3.3    11.0    -      -       -      +
    245C  VAL*     3.0    34.8    +      -       -      +
    105K  PHE*     3.7     4.2    -      -       +      -
    106K  GLU*     5.0     3.6    -      -       -      +
    109K  TRP*     3.1    58.8    +      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 242 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     75C  MET*     4.8     9.4    -      -       +      +
    238C  ILE*     3.1    23.6    -      -       +      -
    239C  PRO*     2.9    15.5    +      -       +      +
    241C  ASP*     1.3    94.3    +      -       -      +
    243C  VAL*     1.3    54.6    +      -       -      +
    245C  VAL*     3.1    25.0    +      -       -      +
    246C  ARG*     2.5    68.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 243 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37C  MET*     3.8    19.7    -      -       +      -
     41C  ILE*     3.7    18.6    -      -       +      +
    172C  PRO*     3.5    27.8    -      -       +      +
    173C  ALA*     4.9     3.4    -      -       +      -
    232C  VAL*     3.7    29.2    -      -       +      -
    233C  GLU      5.4     0.4    -      -       -      +
    234C  SER*     5.1     6.5    -      -       -      -
    238C  ILE*     3.4    24.1    -      -       +      +
    240C  VAL*     3.0    13.6    +      -       -      +
    242C  GLN*     1.3    82.5    -      -       -      +
    244C  VAL*     1.3    65.7    +      -       -      +
    246C  ARG*     3.6     1.1    -      -       -      +
    247C  GLY*     2.8    19.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 244 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18C  VAL*     4.6    11.4    -      -       +      -
     20C  PHE*     4.9     9.9    -      -       +      -
     33C  LEU*     6.2     3.1    -      -       +      -
     37C  MET*     4.2    11.5    -      -       +      +
    232C  VAL*     4.7    14.6    -      -       +      -
    240C  VAL      3.3    12.1    -      -       -      +
    241C  ASP*     3.3    13.9    -      -       -      +
    243C  VAL*     1.3    77.9    -      -       +      +
    245C  VAL*     1.3    51.0    +      -       -      +
    247C  GLY*     3.1     0.9    +      -       -      -
    248C  ILE*     2.9    57.8    +      -       +      +
    101K  LEU*     5.9     0.2    -      -       +      -
    105K  PHE*     3.3    42.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 245 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    241C  ASP*     3.0    24.9    +      -       -      +
    242C  GLN*     3.2    24.0    -      -       -      +
    243C  VAL      2.9     0.8    +      -       -      -
    244C  VAL*     1.3    72.9    -      -       -      +
    246C  ARG*     1.3    66.1    +      -       +      +
    247C  GLY      3.0     1.1    -      -       -      -
    248C  ILE*     3.3     9.6    +      -       +      +
    249C  ASP*     2.9    30.8    +      -       -      +
    102K  LYS*     4.1    16.6    -      -       +      +
    105K  PHE*     3.6    25.6    -      -       +      -
    106K  GLU*     4.2    22.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 246 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41C  ILE*     3.4    17.5    -      -       +      -
     42C  PRO      5.4     0.4    +      -       -      -
     74C  SER      3.8     2.8    +      -       -      -
     75C  MET*     3.1    37.4    +      -       -      +
     77C  ILE*     4.5     3.0    -      -       -      +
     78C  GLU*     3.0    50.7    +      -       -      +
    238C  ILE*     3.5    34.3    -      -       -      +
    242C  GLN*     2.5    62.5    +      -       -      +
    243C  VAL*     3.8     2.0    -      -       -      +
    245C  VAL*     1.3    76.7    -      -       +      +
    247C  GLY*     1.3    53.0    +      -       -      +
    249C  ASP*     3.4     9.8    -      -       +      +
    250C  THR*     2.4    38.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 247 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33C  LEU*     4.8     1.6    -      -       -      -
     36C  VAL*     3.7    11.5    -      -       -      +
     37C  MET*     3.9    17.0    -      -       -      -
     41C  ILE*     3.8    12.5    -      -       -      +
    243C  VAL      2.8    12.4    +      -       -      -
    244C  VAL      3.5     3.8    -      -       -      -
    246C  ARG*     1.3    74.8    -      -       -      +
    248C  ILE*     1.3    65.6    +      -       -      +
    249C  ASP      3.0     1.1    +      -       -      -
    250C  THR      3.2     0.2    +      -       -      -
    251C  LEU*     3.1    28.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 248 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33C  LEU*     3.7    17.0    -      -       +      +
    244C  VAL*     2.9    43.5    +      -       +      +
    245C  VAL*     3.6     8.3    -      -       -      +
    247C  GLY*     1.3    76.3    -      -       -      +
    249C  ASP*     1.3    61.6    +      -       -      +
    251C  LEU*     4.0     3.9    -      -       -      +
    252C  GLN*     3.3    21.6    +      -       +      +
     98K  LEU*     3.4    31.6    -      -       +      +
    101K  LEU*     3.5    41.1    -      -       +      -
    102K  LYS*     3.8    24.5    -      -       +      +
    105K  PHE*     4.7     4.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 249 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78C  GLU*     5.5     3.7    -      -       -      +
    245C  VAL*     2.9    20.7    +      -       -      +
    246C  ARG*     3.4    14.8    -      -       +      +
    248C  ILE*     1.3    77.9    -      -       -      +
    250C  THR*     1.3    57.8    +      -       -      +
    252C  GLN*     3.1    20.3    +      -       -      +
    253C  LYS*     2.9    55.0    +      -       -      +
    102K  LYS*     3.9    21.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 250 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36C  VAL*     4.4    10.3    -      -       +      -
     40C  GLU*     3.9    24.5    -      -       +      +
     41C  ILE*     2.9    17.1    -      -       -      +
     42C  PRO*     4.8     6.8    -      -       +      +
     78C  GLU*     5.5     0.9    +      -       -      -
    246C  ARG*     2.4    29.8    +      -       -      +
    247C  GLY      3.2     2.0    +      -       -      -
    249C  ASP*     1.3    69.1    -      -       -      +
    251C  LEU*     1.3    58.1    +      -       -      +
    252C  GLN      3.0     1.3    -      -       -      -
    253C  LYS*     2.8    20.7    +      -       +      +
    254C  LYS*     2.8    38.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 251 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29C  MET      4.7     1.3    -      -       -      +
     32C  SER      3.4    27.8    -      -       -      +
     33C  LEU*     3.7    25.8    -      -       +      +
     36C  VAL*     3.7    18.1    -      -       +      +
    247C  GLY      3.1    14.3    +      -       -      +
    248C  ILE      4.0     2.9    -      -       -      +
    250C  THR*     1.3    77.6    -      -       -      +
    252C  GLN*     1.3    56.1    +      -       -      +
    254C  LYS*     3.8     7.5    +      -       +      +
    255C  VAL*     3.0    38.3    +      -       +      +
     41K  THR*     4.1    15.3    -      -       +      +
     42K  LEU*     5.7     1.8    -      -       +      -
     45K  LEU*     4.2    18.6    -      -       +      -
     98K  LEU*     3.7    29.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 252 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    248C  ILE*     3.3    12.5    +      -       -      +
    249C  ASP*     3.1    18.6    +      -       -      +
    250C  THR      3.0     0.8    -      -       -      -
    251C  LEU*     1.3    75.2    -      -       -      +
    253C  LYS*     1.3    61.1    +      -       +      +
    255C  VAL*     3.4     6.4    +      -       -      +
    256C  ALA*     3.0    27.2    +      -       -      +
     95K  ILE*     3.5    36.9    +      -       +      +
     98K  LEU*     3.8    14.8    -      -       +      +
     99K  GLY*     3.4    32.7    -      -       -      +
    102K  LYS*     3.2    23.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 253 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78C  GLU*     5.5    12.1    -      -       -      +
    249C  ASP*     2.9    44.7    +      -       +      +
    250C  THR*     2.8    22.0    +      -       +      +
    252C  GLN*     1.3    78.0    -      -       +      +
    254C  LYS*     1.3    56.9    +      -       -      +
    255C  VAL      3.1     0.2    -      -       -      -
    256C  ALA*     2.9     9.7    +      -       -      +
    257C  SER*     2.9    26.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 254 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36C  VAL*     4.8     1.3    -      -       +      -
     40C  GLU*     2.7    35.4    -      -       -      +
    165C  LYS*     5.5     4.8    -      -       -      +
    250C  THR*     2.8    25.3    +      -       +      +
    251C  LEU*     3.9    12.8    -      -       +      +
    253C  LYS*     1.3    72.7    -      -       +      +
    255C  VAL*     1.3    59.7    +      -       -      +
    257C  SER*     3.3    20.0    +      -       -      +
    258C  ILE*     3.6     5.5    -      -       -      +
     10K  PHE*     5.8     5.9    -      -       -      +
     37K  LYS      4.4     4.0    +      -       -      -
     38K  GLU*     2.8    32.4    +      -       -      +
     41K  THR*     5.3     3.1    -      -       +      -
     42K  LEU*     3.2    41.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 255 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    251C  LEU*     3.0    33.7    +      -       +      +
    252C  GLN*     3.7     7.6    -      -       -      +
    253C  LYS      3.1     0.8    -      -       -      -
    254C  LYS*     1.3    79.8    -      -       -      +
    256C  ALA*     1.3    62.6    +      -       -      +
    258C  ILE*     3.3    24.3    -      -       -      +
    259C  LEU*     3.6     5.0    +      -       -      +
     42K  LEU*     4.9    13.0    -      -       +      -
     45K  LEU*     5.4     3.4    -      -       +      -
     46K  ILE*     5.9     4.5    -      -       +      -
     91K  CYS*     3.9    21.8    -      -       +      +
     94K  ILE*     4.1    26.2    -      -       +      -
     95K  ILE*     3.7    25.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 256 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    252C  GLN*     3.0    13.5    +      -       +      +
    253C  LYS*     2.9    10.6    +      -       -      +
    255C  VAL*     1.3    74.4    -      -       -      +
    257C  SER*     1.3    51.1    +      -       -      +
    258C  ILE      2.9     5.2    -      -       -      -
    259C  LEU*     2.8    12.8    +      -       +      +
    260C  LEU*     2.8    35.4    +      -       -      +
     95K  ILE*     4.3    13.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 257 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    253C  LYS      2.9    12.3    +      -       -      -
    254C  LYS*     3.3    22.1    +      -       -      +
    256C  ALA*     1.3    74.9    -      -       -      +
    258C  ILE*     1.3    56.9    +      -       -      +
    260C  LEU*     3.9    14.0    -      -       -      +
    261C  ALA*     3.2    24.1    +      -       -      +
     18K  LYS*     4.7    17.2    -      -       -      +
     38K  GLU*     5.2     0.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 258 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    254C  LYS      3.6    17.9    -      -       -      +
    255C  VAL*     3.3     9.8    +      -       -      +
    256C  ALA      2.9     0.8    -      -       -      -
    257C  SER*     1.3    76.9    +      -       -      +
    259C  LEU*     1.3    69.3    +      -       -      +
    260C  LEU      3.0     1.3    -      -       -      -
    261C  ALA*     2.7    17.2    +      -       -      +
    262C  LEU*     2.9    24.4    +      -       +      +
     18K  LYS*     4.7    13.2    -      -       +      -
     19K  LEU*     4.6    12.6    -      -       +      -
     35K  PHE*     4.0    25.6    -      -       +      -
     38K  GLU*     5.1     0.2    -      -       -      +
     42K  LEU*     3.3    35.9    -      -       +      -
     46K  ILE*     4.3     3.6    -      -       +      -
     87K  LEU*     5.0     2.7    -      -       +      -
     91K  CYS*     3.7    25.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 259 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    255C  VAL      3.6     2.1    +      -       -      +
    256C  ALA*     2.8    18.7    +      -       +      +
    258C  ILE*     1.3    80.5    -      -       -      +
    260C  LEU*     1.3    61.2    +      -       -      +
    262C  LEU*     3.3    16.2    +      -       +      +
    263C  THR*     3.0    18.7    +      -       -      -
     88K  LYS*     4.4    11.4    -      -       +      +
     91K  CYS*     3.3    35.0    -      -       +      -
     92K  ASN*     3.8    37.5    -      -       -      +
     95K  ILE*     4.6    11.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 260 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    256C  ALA      2.8    14.6    +      -       -      +
    257C  SER*     3.9    11.9    -      -       -      +
    259C  LEU*     1.3    78.0    -      -       -      +
    261C  ALA*     1.3    60.8    +      -       -      +
    263C  THR*     3.3    22.8    +      -       +      -
    264C  GLN*     2.9    34.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 261 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    257C  SER      3.2    17.1    +      -       -      +
    258C  ILE*     2.7    15.5    +      -       -      +
    260C  LEU*     1.3    73.7    -      -       -      +
    262C  LEU*     1.3    62.1    +      -       -      +
    264C  GLN*     3.3    21.5    +      -       -      +
    265C  MET*     3.8    14.6    +      -       -      +
     18K  LYS*     4.4    22.9    -      -       +      -
     19K  LEU*     4.4    15.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 262 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    258C  ILE*     2.9    21.3    +      -       +      +
    259C  LEU*     3.6    11.7    -      -       +      +
    261C  ALA*     1.3    73.9    -      -       -      +
    263C  THR*     1.3    64.0    +      -       -      +
    265C  MET*     3.3    15.5    +      -       +      +
    266C  ASP*     3.1    20.8    -      -       -      +
     19K  LEU*     3.7    25.4    -      -       +      -
     21K  ILE*     5.3     5.8    -      -       +      -
     84K  LYS*     4.7    16.8    -      -       +      +
     87K  LEU*     3.8    29.6    -      -       +      -
     88K  LYS*     3.8    40.8    -      -       +      +
     91K  CYS*     5.4     1.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with THR 263 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    259C  LEU      3.0    14.8    +      -       -      -
    260C  LEU*     3.5    18.5    -      -       +      +
    262C  LEU*     1.3    77.6    -      -       -      +
    264C  GLN*     1.3    61.7    +      -       +      +
    265C  MET      3.6     0.5    +      -       -      -
    266C  ASP*     4.2    16.1    +      -       -      +
    267C  GLN*     4.8     7.8    +      -       -      -
     88K  LYS*     5.7     5.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 264 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260C  LEU*     2.9    38.1    +      -       +      +
    261C  ALA*     3.3    17.3    -      -       -      +
    262C  LEU      3.2     0.8    -      -       -      -
    263C  THR*     1.3    78.4    -      -       +      +
    265C  MET*     1.3    59.8    +      -       -      +
    267C  GLN*     3.9    20.1    -      -       -      +
    268C  ASP      5.2     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