Contacts of the helix formed by residues 504 - 528 (chain B) in PDB entry 1FO4


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 MET 504 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    425B  SER*     6.0     0.4    -      -       -      +
    433B  LYS*     3.1    40.2    -      -       +      +
    502B  GLY      3.9     7.6    -      -       -      +
    503B  GLY*     1.3    74.1    -      -       -      +
    505B  ILE*     1.3    66.0    +      -       -      +
    506B  GLU      3.5     2.2    -      -       -      -
    507B  PHE*     4.1    13.2    -      -       +      -
    508B  ARG*     3.0    27.6    +      -       +      +
   1210B  GLU*     3.9    17.5    -      -       -      +
   1212B  HIS*     4.0    16.2    -      -       +      +
   1301B  THR*     5.1     2.0    -      -       -      +
   1303B  GLU*     3.1    57.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 505 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    496B  LEU*     3.8    25.9    -      -       +      +
    497B  SER      3.6    26.9    -      -       -      +
    498B  PRO*     4.3    14.6    -      -       +      +
    500B  ALA*     4.1     9.4    -      -       +      +
    503B  GLY*     3.4    26.7    -      -       -      +
    504B  MET*     1.3    77.1    -      -       -      +
    506B  GLU*     1.3    67.5    +      -       +      +
    509B  ARG*     3.0    46.0    +      -       -      +
   1317B  CYS      5.5     0.4    -      -       -      +
   1319B  THR*     4.2    18.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 506 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    504B  MET      3.5     0.2    -      -       -      -
    505B  ILE*     1.3    77.3    -      -       +      +
    507B  PHE*     1.3    58.6    +      -       -      +
    509B  ARG*     3.4     2.0    +      -       -      +
    510B  THR*     2.9    35.5    +      -       -      +
   1307B  ASN*     4.2    20.2    +      -       -      +
   1317B  CYS*     4.1    11.2    -      -       -      +
   1318B  VAL*     3.2    21.2    -      -       +      +
   1319B  THR*     2.8    47.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 507 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    423B  GLN*     4.1     3.4    -      -       +      -
    424B  ALA      5.0     0.7    -      -       -      -
    433B  LYS*     4.1    20.0    -      -       +      -
    504B  MET*     3.6    20.8    +      -       +      +
    505B  ILE      3.4     0.4    -      -       -      -
    506B  GLU*     1.3    78.2    -      -       -      +
    508B  ARG*     1.3    60.1    +      -       +      +
    510B  THR*     3.3     3.8    +      -       -      -
    511B  LEU*     2.9    51.9    +      -       +      +
   1168B  THR      3.5    18.2    -      -       -      -
   1302B  PRO*     3.6    11.4    -      -       +      -
   1303B  GLU*     3.6    48.2    +      -       +      +
   1306B  ARG*     3.4    36.1    -      -       +      -
   1307B  ASN*     3.4    15.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 508 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    433B  LYS*     3.6    24.2    -      -       +      +
    434B  VAL*     3.6    18.1    -      -       +      +
    458B  GLY      2.9    31.9    +      -       -      -
    459B  MET*     3.8    11.6    -      -       -      +
    496B  LEU*     3.8    23.2    -      -       +      +
    500B  ALA*     3.6    22.2    -      -       -      +
    501B  PRO      3.2    24.6    +      -       -      -
    502B  GLY*     4.9     2.0    -      -       -      -
    503B  GLY      2.8    28.6    +      -       -      +
    504B  MET*     3.0    21.1    +      -       +      +
    505B  ILE*     3.9     2.6    -      -       -      +
    507B  PHE*     1.3    75.3    -      -       +      +
    509B  ARG*     1.3    68.5    +      -       -      +
    511B  LEU*     3.1     5.7    +      -       -      +
    512B  THR*     3.1    25.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 509 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    459B  MET*     4.1     2.9    -      -       +      -
    491B  ALA*     2.9    34.4    +      -       -      +
    494B  LEU      3.1    24.6    +      -       -      +
    495B  SER*     3.6     9.2    -      -       -      +
    496B  LEU*     3.9    20.4    -      -       +      +
    505B  ILE*     3.0    40.0    +      -       -      +
    506B  GLU      3.8     2.9    -      -       -      +
    508B  ARG*     1.3    75.5    -      -       -      +
    510B  THR*     1.3    61.7    +      -       -      +
    512B  THR*     2.5    27.4    +      -       -      +
    513B  LEU*     3.4     4.2    +      -       -      +
   1316B  LEU      3.8    20.4    +      -       -      -
   1317B  CYS*     3.4    35.5    +      -       +      +
   1318B  VAL      5.3     1.2    +      -       -      -
   1319B  THR*     6.1     0.2    -      -       -      +
   1321B  ALA*     5.9     0.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 510 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    506B  GLU*     2.9    24.9    +      -       -      +
    507B  PHE*     3.5     7.2    -      -       -      -
    509B  ARG*     1.3    78.2    -      -       -      +
    511B  LEU*     1.3    57.5    +      -       -      +
    513B  LEU*     3.3     4.0    +      -       -      +
    514B  SER*     2.8    31.8    +      -       -      +
   1306B  ARG*     3.4    44.6    -      -       +      +
   1307B  ASN*     4.8     3.0    +      -       -      -
   1313B  PHE*     4.8     0.9    -      -       +      -
   1314B  THR*     3.8    25.1    -      -       +      +
   1317B  CYS*     3.5    21.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 511 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    423B  GLN*     3.9    20.6    -      -       +      -
    433B  LYS*     4.3     5.8    -      -       +      -
    434B  VAL*     3.8    30.7    -      -       +      -
    507B  PHE*     2.9    47.0    +      -       +      +
    508B  ARG*     3.1     7.8    +      -       -      +
    510B  THR*     1.3    73.2    -      -       -      +
    512B  THR*     1.3    60.7    +      -       -      +
    514B  SER*     3.7     2.4    -      -       -      -
    515B  PHE*     2.8    45.1    +      -       +      -
   1167B  LEU      3.9     5.6    -      -       -      +
   1168B  THR*     3.7    37.2    -      -       -      +
   1306B  ARG*     4.8     1.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 512 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    434B  VAL*     4.2     3.1    -      -       +      -
    456B  TYR*     2.8    45.7    +      -       +      -
    459B  MET*     3.5    39.1    -      -       +      +
    490B  LEU*     3.8     2.6    +      -       -      +
    494B  LEU*     3.9    17.0    +      -       +      +
    508B  ARG      3.1    14.8    +      -       -      +
    509B  ARG*     2.5    19.9    +      -       -      -
    511B  LEU*     1.3    77.8    -      -       -      +
    513B  LEU*     1.3    71.4    +      -       -      +
    515B  PHE      3.8     0.2    +      -       -      -
    516B  PHE      3.4     9.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 513 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    487B  CYS*     3.5    34.9    -      -       +      +
    490B  LEU*     3.3    39.3    -      -       +      -
    491B  ALA*     3.7     9.6    -      -       +      +
    509B  ARG*     3.7     9.6    -      -       +      +
    510B  THR      3.3     4.8    +      -       -      +
    511B  LEU      3.2     0.2    -      -       -      -
    512B  THR*     1.3    88.1    +      -       -      +
    514B  SER*     1.3    59.8    +      -       -      +
    516B  PHE*     3.3     3.8    +      -       -      +
    517B  PHE*     3.0    27.4    +      -       -      +
   1313B  PHE*     4.0    29.8    -      -       +      +
   1316B  LEU*     4.1    13.7    -      -       +      -
   1317B  CYS*     3.7    20.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 514 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    510B  THR*     2.8    23.5    +      -       -      +
    511B  LEU*     3.2     5.8    +      -       -      -
    513B  LEU*     1.3    74.1    -      -       -      +
    515B  PHE*     1.3    68.0    +      -       -      +
    517B  PHE*     3.2     9.7    +      -       -      +
    518B  LYS*     3.1    27.4    +      -       -      +
   1167B  LEU*     3.1    33.0    +      -       -      +
   1168B  THR*     6.3     0.2    -      -       -      -
   1306B  ARG*     3.0    28.1    +      -       -      -
   1313B  PHE*     4.5     4.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 515 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    421B  PHE*     3.2    53.3    -      +       +      -
    422B  LYS      3.9     1.6    -      -       -      -
    423B  GLN*     3.6    31.4    -      -       +      -
    434B  VAL*     3.4    37.9    -      -       +      -
    435B  THR      4.3     0.2    -      -       -      -
    436B  CYS*     3.6    22.7    -      -       +      -
    438B  MET*     3.9     6.3    -      -       +      -
    456B  TYR*     4.6     1.8    -      +       +      -
    511B  LEU*     2.8    30.7    +      -       +      +
    512B  THR      4.0     2.2    -      -       -      +
    514B  SER*     1.3    74.7    -      -       -      +
    516B  PHE*     1.3    62.8    +      -       -      +
    518B  LYS*     3.3     4.4    +      -       +      -
    519B  PHE*     3.0    18.2    +      -       -      +
   1168B  THR*     3.9    28.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 516 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    438B  MET*     3.7    10.0    -      -       +      +
    452B  LEU*     5.0     2.5    -      -       +      -
    454B  LEU*     3.6    26.7    -      -       +      -
    478B  TRP*     4.1    13.5    -      +       -      -
    482B  LEU*     3.9    13.0    -      -       +      -
    483B  LEU*     3.9    29.2    -      -       +      -
    486B  VAL*     3.4    44.0    -      -       +      -
    487B  CYS*     4.4     5.2    -      -       -      -
    490B  LEU*     3.9     9.9    -      -       +      -
    512B  THR      3.4    11.9    +      -       -      +
    513B  LEU      3.3     7.5    +      -       -      +
    514B  SER      3.2     0.6    -      -       -      -
    515B  PHE*     1.3    76.7    -      -       -      +
    517B  PHE*     1.3    56.8    +      -       -      +
    519B  PHE*     3.0    25.7    +      +       -      +
    520B  TYR*     2.7    38.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 517 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    483B  LEU*     3.9    31.9    -      -       +      -
    513B  LEU      3.0    13.8    +      -       -      +
    514B  SER*     3.2    10.3    +      -       -      +
    516B  PHE*     1.3    76.4    -      -       -      +
    518B  LYS*     1.3    56.2    +      -       -      +
    520B  TYR*     3.3     4.8    +      +       -      +
    521B  LEU*     3.0    66.1    +      -       +      +
    542B  TYR*     3.9    10.5    -      +       -      -
    993B  TRP*     3.4    45.5    -      +       -      -
   1167B  LEU*     3.8    20.6    -      -       +      -
   1312B  LYS*     4.3     5.8    -      -       -      -
   1313B  PHE*     3.3    35.9    -      +       +      -
----------------------------------------------------------
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Residues in contact with LYS 518 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    421B  PHE*     3.6    33.0    -      -       +      -
    514B  SER      3.1    17.0    +      -       -      +
    515B  PHE*     3.6     8.1    -      -       +      +
    516B  PHE      3.2     0.2    -      -       -      -
    517B  PHE*     1.3    73.8    -      -       -      +
    519B  PHE*     1.3    57.1    +      -       -      +
    521B  LEU*     3.4     7.3    +      -       -      +
    522B  THR*     2.7    39.6    +      -       -      +
    545B  ALA*     3.4    29.4    +      -       +      +
    546B  THR*     4.5     0.3    -      -       -      +
    547B  LEU      4.8     5.5    +      -       -      -
    994B  LYS*     4.2     5.5    -      -       -      +
   1165B  ASP*     2.7    30.7    +      -       -      -
   1167B  LEU*     3.8    33.7    -      -       +      -
   1168B  THR*     3.9    14.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 519 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    417B  PHE      4.2     6.3    -      -       -      -
    418B  PHE*     4.3     1.3    -      -       -      -
    419B  SER*     3.4    29.6    -      -       -      -
    421B  PHE*     3.8     7.1    -      -       +      -
    438B  MET*     3.5    57.9    -      -       +      -
    439B  ARG      3.8    13.5    -      -       -      -
    440B  VAL*     3.9    12.1    -      -       +      -
    452B  LEU*     4.1     5.6    -      -       +      -
    454B  LEU*     3.9     9.9    -      -       +      -
    478B  TRP*     3.7    20.2    -      +       -      -
    515B  PHE      3.0     7.3    +      -       -      +
    516B  PHE*     3.3    29.6    -      +       -      +
    518B  LYS*     1.3    76.3    -      -       -      +
    520B  TYR*     1.3    55.4    +      -       -      +
    522B  THR*     3.3     1.6    +      -       -      -
    523B  VAL*     2.9    47.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 520 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    478B  TRP*     3.1    57.8    +      +       -      -
    479B  ASN*     2.7    46.1    -      -       -      -
    480B  GLU*     3.0    10.5    +      -       -      -
    482B  LEU*     4.3     7.9    -      -       +      -
    483B  LEU*     4.0    34.1    -      -       +      -
    516B  PHE*     2.7    30.7    +      +       +      +
    517B  PHE*     3.5     7.0    -      +       -      +
    519B  PHE*     1.3    74.2    -      -       -      +
    521B  LEU*     1.3    76.4    +      -       +      +
    523B  VAL      3.4     0.2    +      -       -      -
    524B  LEU*     3.1    46.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 521 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    517B  PHE*     3.0    55.1    +      -       +      +
    518B  LYS*     4.0     2.2    -      -       -      +
    520B  TYR*     1.3    91.8    -      -       +      +
    522B  THR*     1.3    65.7    +      -       -      +
    524B  LEU*     3.3    12.5    +      -       +      +
    525B  LYS*     3.0    23.9    +      -       -      +
    538B  LEU*     3.9    15.5    -      -       +      +
    542B  TYR*     4.0    27.8    -      -       +      +
    545B  ALA*     4.0    22.0    -      -       +      -
    546B  THR*     3.5    14.6    -      -       +      -
    993B  TRP*     5.0     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 522 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    419B  SER*     4.1    13.5    +      -       -      +
    421B  PHE*     4.8     4.9    -      -       -      -
    518B  LYS*     2.7    26.6    +      -       -      +
    519B  PHE*     3.6     4.4    -      -       -      -
    521B  LEU*     1.3    77.2    -      -       -      +
    523B  VAL*     1.3    57.3    +      -       +      +
    525B  LYS*     3.5     7.3    +      -       +      +
    526B  LYS*     3.0    56.3    +      -       +      +
    546B  THR*     3.5    31.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 523 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    417B  PHE*     4.4    11.0    -      -       +      -
    440B  VAL*     4.1     7.6    -      -       +      -
    442B  PHE*     3.7    28.0    -      -       +      -
    478B  TRP*     3.3    38.4    -      -       +      +
    519B  PHE*     2.9    46.6    +      -       +      +
    521B  LEU      3.2     0.2    -      -       -      -
    522B  THR*     1.3    76.6    -      -       +      +
    524B  LEU*     1.3    54.4    +      -       -      +
    526B  LYS*     3.1     7.5    +      -       -      +
    527B  LEU*     2.7    37.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 524 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    447B  MET*     3.8    27.3    -      -       +      +
    478B  TRP*     3.8    22.2    -      -       +      +
    479B  ASN*     5.7     0.2    -      -       -      -
    520B  TYR*     3.1    46.0    +      -       +      +
    521B  LEU*     3.3     9.2    +      -       +      +
    523B  VAL*     1.3    75.1    -      -       -      +
    525B  LYS*     1.3    64.2    +      -       -      +
    527B  LEU*     3.2    14.5    +      -       -      +
    528B  GLY*     3.4     8.5    +      -       -      -
    538B  LEU*     3.6    27.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 525 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    521B  LEU      3.0    13.6    +      -       -      +
    522B  THR*     3.5    11.9    -      -       +      +
    524B  LEU*     1.3    76.5    -      -       -      +
    526B  LYS*     1.3    62.7    +      -       +      +
    528B  GLY*     3.2    16.8    +      -       -      -
    538B  LEU*     4.2    16.8    -      -       +      +
    543B  THR*     4.8    11.9    -      -       +      +
    546B  THR*     3.3    33.2    +      -       +      +
    547B  LEU*     4.0    18.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 526 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    325B  GLU*     2.7    32.3    +      -       -      +
    328B  ARG*     5.0     7.8    -      -       -      +
    417B  PHE*     3.6    45.3    -      -       +      +
    418B  PHE      3.4    16.6    +      -       -      +
    419B  SER*     4.7     0.4    +      -       -      -
    522B  THR*     3.0    43.0    +      -       +      +
    523B  VAL*     3.1     4.2    +      -       +      +
    525B  LYS*     1.3    73.9    -      -       +      +
    527B  LEU*     1.3    61.1    +      -       -      +
    528B  GLY      3.1    10.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 527 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    415B  ASP*     5.8     2.9    -      -       -      +
    417B  PHE*     3.9    21.5    -      -       +      -
    442B  PHE*     3.8    19.1    -      -       +      -
    446B  SER      4.0    20.0    -      -       -      +
    447B  MET*     3.8    39.0    -      -       +      +
    478B  TRP*     4.1     8.5    -      -       +      -
    523B  VAL*     2.7    41.2    +      -       +      +
    524B  LEU*     3.2     7.3    +      -       -      +
    526B  LYS*     1.3    72.4    -      -       -      +
    528B  GLY*     1.3    58.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 528 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    524B  LEU      3.4     6.3    +      -       -      -
    525B  LYS      3.2    13.7    +      -       -      -
    526B  LYS      3.1     6.7    -      -       -      -
    527B  LEU*     1.3    81.3    -      -       -      +
----------------------------------------------------------
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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