Contacts of the helix formed by residues 284 - 309 (chain B) in PDB entry 3LKB


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 SER 284 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26B  PRO*     3.7    15.7    -      -       -      +
    236B  PRO*     5.0     2.5    -      -       -      -
    237B  ASP*     2.6    31.7    +      -       -      -
    268B  GLN*     3.5     1.2    -      -       -      +
    280B  ASN      3.4    13.9    +      -       -      -
    281B  PHE*     3.2    15.4    +      -       -      -
    283B  GLU*     1.3    79.0    -      -       -      +
    285B  VAL*     1.3    58.9    +      -       -      +
    286B  ASN*     3.0    16.1    +      -       -      +
    287B  TYR*     3.2    18.4    +      -       -      +
    288B  THR*     3.3    12.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 285 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    231B  HIS*     4.0     9.2    -      -       -      +
    234B  GLY      4.0    10.5    -      -       -      +
    235B  GLY*     4.3     4.5    -      -       -      -
    236B  PRO*     4.6     4.8    -      -       +      +
    237B  ASP*     4.4     2.2    +      -       -      +
    251B  TRP*     3.8    36.6    -      -       +      -
    253B  THR*     4.6     0.4    -      -       +      -
    255B  PHE*     3.6    37.7    -      -       +      -
    256B  TYR      4.6     1.8    -      -       -      +
    257B  MET*     4.3     7.0    -      -       +      -
    283B  GLU      3.3     3.2    +      -       -      -
    284B  SER*     1.3    72.2    +      -       -      +
    286B  ASN*     1.3    75.6    +      -       -      +
    287B  TYR      3.3     0.2    -      -       -      -
    288B  THR*     3.3     9.6    -      -       -      -
    289B  ASN*     2.8    24.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 286 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22B  ASP      5.1     0.4    +      -       -      -
     23B  ALA*     3.8    28.8    -      -       -      +
     26B  PRO*     4.3     2.5    -      -       +      -
     27B  TYR*     3.3    18.1    -      -       +      +
    231B  HIS*     2.8    30.1    -      -       -      -
    232B  TYR*     3.2    32.5    +      -       +      +
    234B  GLY      5.1     3.0    +      -       -      -
    237B  ASP*     4.3     9.9    +      -       -      -
    284B  SER*     3.0     8.0    +      -       -      +
    285B  VAL*     1.3    90.1    -      -       -      +
    287B  TYR*     1.3    58.4    +      -       -      +
    289B  ASN*     3.2     6.5    +      -       +      +
    290B  GLY      3.0    21.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 287 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26B  PRO*     3.4    24.2    -      -       +      +
     29B  ALA*     3.9     8.1    -      -       +      -
     30B  ALA*     3.1    25.5    -      -       +      +
     33B  ASP*     2.6    35.1    +      -       -      +
    268B  GLN*     3.7    39.3    -      -       +      -
    271B  ILE*     3.7     2.4    -      -       -      +
    272B  GLY*     3.3    23.1    +      -       -      -
    277B  ARG*     4.4     8.7    -      -       +      -
    281B  PHE*     2.9    31.0    -      -       +      +
    282B  ILE*     3.8     8.5    -      -       -      -
    284B  SER*     3.2    10.9    +      -       -      +
    286B  ASN*     1.3    74.6    -      -       -      +
    288B  THR*     1.3    62.4    +      -       -      +
    291B  MET*     3.1    35.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 288 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    255B  PHE*     3.5    25.6    -      -       +      -
    256B  TYR      4.7     1.8    +      -       -      +
    258B  ALA*     5.9     1.2    +      -       -      -
    265B  ILE*     4.0    10.7    -      -       +      +
    268B  GLN*     2.6    36.0    +      -       -      +
    283B  GLU      5.4     0.2    +      -       -      -
    284B  SER      3.3     6.8    +      -       -      -
    285B  VAL*     3.3    16.5    +      -       -      +
    287B  TYR*     1.3    75.9    -      -       -      +
    289B  ASN*     1.3    57.6    +      -       -      +
    291B  MET*     3.3     5.2    +      -       -      +
    292B  LEU*     3.0    28.1    +      -       -      +
    333B  PHE*     3.9    22.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 289 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27B  TYR*     3.5    13.9    +      -       +      -
    104B  ALA*     5.3     1.0    -      -       -      +
    106B  MET*     3.7     7.1    -      -       -      +
    122B  PRO*     5.6     5.2    -      -       -      +
    123B  THR*     4.9     1.7    -      -       -      +
    231B  HIS*     3.5     4.9    -      -       -      -
    232B  TYR*     2.9    31.9    +      -       -      -
    255B  PHE*     3.1    31.5    -      -       +      -
    285B  VAL      2.8    17.3    +      -       -      +
    286B  ASN*     3.2    25.1    +      -       -      +
    287B  TYR      3.2     0.2    -      -       -      -
    288B  THR*     1.3    76.3    -      -       -      +
    290B  GLY*     1.3    62.0    +      -       -      +
    292B  LEU*     3.4     4.7    +      -       -      +
    293B  ALA*     3.1    20.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 290 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27B  TYR*     3.6    38.3    -      -       -      -
     30B  ALA*     3.6     7.0    -      -       -      -
     31B  VAL*     4.0     4.6    -      -       -      +
    286B  ASN      3.0    13.4    +      -       -      -
    289B  ASN*     1.3    78.1    -      -       -      +
    291B  MET*     1.3    55.5    +      -       -      +
    293B  ALA*     3.2     2.4    +      -       -      +
    294B  ALA*     3.0    29.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 291 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30B  ALA*     3.4    17.8    -      -       +      +
     34B  TYR*     3.6    19.2    -      -       +      -
    267B  LEU*     4.5     1.3    -      -       -      -
    268B  GLN*     3.6    28.3    -      -       +      -
    271B  ILE*     3.9    41.1    -      -       +      -
    287B  TYR*     3.1    39.5    +      -       +      +
    288B  THR*     3.7     5.2    -      -       -      +
    289B  ASN      3.3     0.2    -      -       -      -
    290B  GLY*     1.3    72.6    -      -       -      +
    292B  LEU*     1.3    57.3    +      -       -      +
    294B  ALA*     3.7     4.5    -      -       -      +
    295B  ALA*     2.7    36.7    +      -       -      +
    333B  PHE*     3.6    23.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 292 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122B  PRO*     4.0    21.1    -      -       +      -
    123B  THR*     4.1     9.2    -      -       +      -
    255B  PHE*     3.8    22.7    -      -       +      -
    288B  THR      3.0    13.9    +      -       -      +
    289B  ASN      3.6     7.9    -      -       -      +
    291B  MET*     1.3    76.8    -      -       -      +
    293B  ALA*     1.3    63.5    +      -       -      +
    295B  ALA*     3.2     0.7    +      -       +      -
    296B  ILE*     2.9    44.7    +      -       +      +
    331B  PRO*     4.1    13.0    -      -       +      -
    333B  PHE*     3.8    29.3    -      -       +      -
    334B  ALA*     4.4     8.7    -      -       +      -
    342B  GLU*     4.6     0.9    -      -       -      +
    343B  ILE*     4.1    20.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 293 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27B  TYR*     3.1    31.0    -      -       +      +
     31B  VAL*     5.5     0.2    -      -       +      -
     80B  LEU*     4.2    14.7    -      -       +      +
    102B  ILE*     4.3    22.3    -      -       +      +
    122B  PRO*     4.8     7.0    -      -       +      -
    289B  ASN      3.1     9.1    +      -       -      +
    290B  GLY      3.6     7.0    -      -       -      +
    291B  MET      3.2     0.2    -      -       -      -
    292B  LEU*     1.3    79.5    -      -       -      +
    294B  ALA*     1.3    64.1    +      -       -      +
    296B  ILE*     3.3     4.6    +      -       -      +
    297B  ALA*     3.0    21.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 294 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10B  LEU*     4.5     4.9    -      -       +      +
     31B  VAL*     4.1    23.1    -      -       +      +
     34B  TYR*     3.8    27.6    -      -       +      -
     80B  LEU*     4.3    11.7    -      -       +      +
    290B  GLY      3.0    16.4    +      -       -      +
    291B  MET*     3.8     3.1    -      -       -      +
    293B  ALA*     1.3    77.8    -      -       -      +
    295B  ALA*     1.3    56.5    +      -       -      +
    297B  ALA*     3.2     3.6    +      -       -      +
    298B  VAL*     2.9    32.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 295 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     34B  TYR*     3.5    30.2    +      -       +      +
    291B  MET      2.7    22.1    +      -       -      +
    292B  LEU*     3.2     3.8    +      -       -      +
    294B  ALA*     1.3    69.2    -      -       -      +
    296B  ILE*     1.3    60.3    +      -       -      +
    298B  VAL*     3.3     0.5    +      -       -      +
    299B  GLU*     2.8    32.6    +      -       -      +
    329B  PHE*     3.8    18.1    -      -       +      -
    331B  PRO*     4.8     1.1    -      -       +      -
    333B  PHE*     4.0    18.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 296 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    102B  ILE*     3.5    21.1    -      -       +      -
    122B  PRO*     4.1    22.7    -      -       +      -
    292B  LEU*     2.9    46.9    +      -       +      +
    293B  ALA*     3.7     5.4    -      -       -      +
    295B  ALA*     1.3    73.6    -      -       -      +
    297B  ALA*     1.3    62.9    +      -       -      +
    299B  GLU*     3.8     1.2    -      -       -      +
    300B  ALA*     3.0    22.9    +      -       -      +
    320B  ILE*     4.9     5.6    -      -       +      -
    323B  MET*     4.3    11.1    -      -       +      +
    329B  PHE*     3.9    20.4    -      -       +      -
    343B  ILE*     3.9    20.0    -      -       +      -
    345B  PHE*     4.4    19.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 297 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10B  LEU*     4.1    20.2    -      -       +      -
     78B  VAL*     4.3    13.3    -      -       +      +
     80B  LEU*     3.9    21.3    -      -       +      -
    102B  ILE*     4.1     7.1    -      -       +      +
    293B  ALA      3.0    13.6    +      -       -      +
    294B  ALA*     3.2    10.3    +      -       -      +
    296B  ILE*     1.3    76.1    -      -       -      +
    298B  VAL*     1.3    57.4    +      -       -      +
    300B  ALA*     3.3     5.1    +      -       -      +
    301B  ILE*     3.1    33.5    +      -       -      +
    316B  VAL*     5.3     0.8    -      -       -      +
    320B  ILE*     6.1     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 298 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10B  LEU*     3.8    22.2    -      -       +      -
     34B  TYR*     3.8    27.8    -      -       +      +
     35B  CYS*     5.8     0.9    -      -       -      -
     38B  ALA*     4.5     4.9    -      -       +      -
     43B  LEU*     4.2    20.2    -      -       +      -
     44B  VAL*     4.2     8.4    -      -       +      +
     49B  PHE*     4.1    28.3    -      -       +      -
    294B  ALA      2.9    18.8    +      -       -      +
    295B  ALA      3.9     0.7    -      -       -      +
    297B  ALA*     1.3    73.1    -      -       -      +
    299B  GLU*     1.3    61.0    +      -       -      +
    301B  ILE*     3.2     7.4    +      -       -      +
    302B  ARG*     2.8    28.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 299 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    295B  ALA      2.8    21.5    +      -       -      +
    296B  ILE      3.9     3.1    -      -       -      +
    298B  VAL*     1.3    75.5    -      -       -      +
    300B  ALA*     1.3    57.5    +      -       -      +
    302B  ARG*     2.5    44.8    +      -       -      +
    303B  ARG*     2.6    65.6    +      -       -      +
    323B  MET*     4.1     5.8    -      -       +      -
    329B  PHE*     3.7    39.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 300 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    296B  ILE      3.0    18.4    +      -       -      +
    297B  ALA*     3.6     5.2    -      -       -      +
    299B  GLU*     1.3    73.2    -      -       -      +
    301B  ILE*     1.3    67.6    +      -       -      +
    303B  ARG*     3.2     0.9    +      -       -      -
    304B  ALA*     2.9    25.3    +      -       -      +
    316B  VAL*     4.0    18.8    -      -       +      +
    319B  ALA*     3.5     9.8    -      -       +      +
    320B  ILE*     3.7    29.2    -      -       +      -
    323B  MET*     4.1     8.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 301 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8B  VAL*     4.2    12.1    -      -       +      -
     10B  LEU*     4.0    26.0    -      -       +      -
     44B  VAL*     4.5     5.4    -      -       +      -
     49B  PHE*     4.2    28.5    -      -       +      -
     77B  PRO*     4.7     2.2    -      -       +      -
     78B  VAL*     4.0    12.3    -      -       +      -
    297B  ALA      3.1    19.6    +      -       -      +
    298B  VAL*     3.2     4.9    +      -       -      +
    300B  ALA*     1.3    76.4    -      -       -      +
    302B  ARG*     1.3    62.8    +      -       -      +
    304B  ALA*     3.2     1.9    +      -       -      +
    305B  GLN*     3.0    22.9    +      -       -      +
    311B  ILE*     3.8    32.2    -      -       +      +
    316B  VAL*     3.9    25.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 302 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43B  LEU*     3.8    28.7    -      -       +      +
     44B  VAL*     3.9    20.4    -      -       +      +
     45B  PRO*     5.2     3.4    -      -       +      -
    298B  VAL*     2.8    17.9    +      -       +      +
    299B  GLU*     2.5    49.6    +      -       -      +
    301B  ILE*     1.3    77.8    -      -       -      +
    303B  ARG*     1.3    74.6    +      -       -      +
    305B  GLN*     3.4     4.3    -      -       -      +
    306B  GLU*     3.2    40.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 303 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    299B  GLU*     2.6    50.5    +      -       -      +
    300B  ALA      3.9     2.9    -      -       -      +
    302B  ARG*     1.3    88.0    -      -       -      +
    304B  ALA*     1.3    52.0    +      -       -      +
    306B  GLU*     3.2    13.4    +      -       -      +
    307B  ARG*     2.7    56.2    +      -       -      +
    319B  ALA*     3.9    18.5    +      -       +      -
    322B  GLY      4.4     1.4    +      -       -      -
    323B  MET*     3.6    23.6    -      -       -      +
    327B  ASN*     2.6    49.1    +      -       -      +
    328B  ALA      3.7    10.1    +      -       -      -
    329B  PHE*     4.0    14.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 304 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    300B  ALA      2.9    12.6    +      -       -      +
    301B  ILE*     3.4    11.2    -      -       -      +
    303B  ARG*     1.3    73.3    -      -       -      +
    305B  GLN*     1.3    57.1    +      -       -      +
    308B  PHE*     2.7    43.8    +      -       -      +
    309B  LYS      3.5     0.9    +      -       -      -
    310B  ARG      3.5     5.6    -      -       -      +
    311B  ILE*     4.9     2.7    -      -       +      -
    315B  THR*     3.6    42.2    -      -       -      +
    316B  VAL*     4.1     5.4    -      -       +      +
    319B  ALA*     3.9     2.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 305 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6B  GLN*     4.8     6.7    +      -       -      -
     44B  VAL*     4.0    12.3    -      -       +      -
     45B  PRO*     3.5    30.3    +      -       +      +
     47B  VAL*     4.4     4.0    -      -       +      +
    301B  ILE      3.0     9.0    +      -       -      +
    302B  ARG*     3.4    13.0    -      -       -      +
    304B  ALA*     1.3    73.8    -      -       -      +
    306B  GLU*     1.3    60.1    +      -       +      +
    309B  LYS*     2.9    57.8    +      -       -      +
    310B  ARG*     4.2     1.8    +      -       -      -
    311B  ILE*     3.3    34.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 306 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    302B  ARG*     3.2    32.0    +      -       +      +
    303B  ARG*     3.6    21.7    -      -       -      +
    305B  GLN*     1.3    80.6    -      -       -      +
    307B  ARG*     1.3    76.1    +      -       -      +
    309B  LYS*     3.6    19.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 307 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    303B  ARG*     2.7    49.3    +      -       -      +
    306B  GLU*     1.3    86.2    +      -       -      +
    308B  PHE*     1.3    95.6    +      -       +      +
    309B  LYS*     5.3     2.7    +      -       -      +
    318B  GLN      4.9     4.2    +      -       -      -
    319B  ALA*     4.2    17.0    +      -       -      +
    322B  GLY*     5.5     8.3    +      -       -      -
    327B  ASN*     4.9    11.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 308 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    304B  ALA*     2.7    22.2    +      -       -      +
    307B  ARG*     1.3   114.1    -      -       +      +
    309B  LYS*     1.3    64.9    +      -       -      +
    310B  ARG*     2.9    26.3    +      -       +      +
    315B  THR*     3.7    39.9    -      -       +      -
    318B  GLN*     3.9    33.9    -      -       +      -
    319B  ALA      5.1     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 309 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6B  GLN*     5.9     1.0    +      -       -      -
    304B  ALA      3.5     0.4    +      -       -      -
    305B  GLN*     2.9    49.2    +      -       -      +
    306B  GLU*     3.6    19.2    +      -       -      +
    307B  ARG      5.3     1.9    +      -       -      +
    308B  PHE*     1.3    77.9    -      -       -      +
    310B  ARG*     1.3    66.6    +      -       -      +
----------------------------------------------------------
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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