Contacts of the helix formed by residues 697 - 721 (chain A) in PDB entry 2RD0


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 697 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    298A  PRO*     3.9    32.1    -      -       +      +
    299A  MET*     3.4    50.6    -      -       +      +
    301A  CYS*     5.0    12.1    -      -       +      -
    696A  GLY*     1.3    72.3    -      -       -      +
    698A  TYR*     1.3    66.7    +      -       -      +
    700A  LYS*     2.9    33.4    +      -       -      +
    701A  HIS*     3.7    15.3    +      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 698 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    299A  MET*     4.8     0.8    -      -       -      +
    661A  GLN*     3.2    47.3    +      -       +      +
    665A  HIS*     2.7    47.9    +      -       +      +
    691A  TYR*     3.9    12.8    -      -       -      -
    695A  CYS*     4.2    12.7    +      -       +      +
    696A  GLY*     3.0     1.6    -      -       -      -
    697A  MET*     1.3    80.0    -      -       -      +
    699A  LEU*     1.3    64.1    +      -       -      +
    701A  HIS*     3.1    33.9    +      +       +      -
    702A  LEU*     2.9    54.7    +      -       +      +
    705A  GLN*     3.9     6.9    +      -       -      -
    752A  LEU*     4.4    11.0    -      -       +      -
    757A  PRO*     3.9    11.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 699 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114A  ASN*     4.3     8.5    -      -       -      +
    116A  GLU*     4.1    19.7    -      -       -      +
    117A  ILE*     3.7    22.9    -      -       +      +
    120A  ALA*     4.1    10.1    -      -       +      -
    692A  CYS*     3.6    42.2    -      -       +      +
    695A  CYS*     3.7    14.9    -      -       -      -
    696A  GLY      3.2    14.8    +      -       -      +
    697A  MET      2.9     1.2    +      -       -      -
    698A  TYR*     1.3    77.9    -      -       -      +
    700A  LYS*     1.3    62.1    +      -       -      +
    702A  LEU*     3.1    11.1    +      -       +      +
    703A  ASN*     3.0    41.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 700 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116A  GLU*     4.6    16.1    +      -       -      +
    697A  MET*     2.9    23.7    +      -       -      +
    699A  LEU*     1.3    79.3    -      -       -      +
    701A  HIS*     1.3    63.4    +      -       +      +
    703A  ASN*     3.3    29.3    +      -       +      +
    704A  ARG*     3.3    37.3    +      -       -      +
    707A  GLU*     3.6    15.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 701 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    661A  GLN*     5.5     1.0    +      -       -      -
    697A  MET*     3.7    12.9    +      -       +      -
    698A  TYR*     3.1    40.8    +      +       +      +
    700A  LYS*     1.3    78.1    -      -       +      +
    702A  LEU*     1.3    62.8    +      -       -      +
    704A  ARG*     2.8    52.5    +      -       -      +
    705A  GLN*     3.1    20.0    +      -       -      +
    751A  PHE*     5.4     0.5    -      -       -      +
    752A  LEU*     4.6    20.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 702 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    120A  ALA*     5.4     1.1    -      -       +      -
    665A  HIS*     4.3     1.1    -      -       -      +
    668A  PHE*     3.7    53.4    -      -       +      -
    669A  TRP*     3.7    18.8    -      -       +      +
    691A  TYR*     4.1    14.6    -      -       +      -
    695A  CYS*     5.0     1.1    -      -       -      -
    698A  TYR*     2.9    49.6    +      -       +      +
    699A  LEU*     3.5    18.6    -      -       +      +
    701A  HIS*     1.3    73.2    -      -       -      +
    703A  ASN*     1.3    59.1    +      -       -      +
    705A  GLN*     3.1    16.0    -      -       -      +
    706A  VAL*     2.8    30.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 703 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116A  GLU*     4.9    14.4    -      -       -      +
    117A  ILE      5.0     0.5    +      -       -      +
    119A  PHE*     2.9    32.4    -      -       +      +
    120A  ALA*     3.2    17.6    +      -       -      +
    699A  LEU*     3.0    50.5    +      -       -      +
    700A  LYS*     3.3    22.3    +      -       -      +
    701A  HIS      3.2     0.4    -      -       -      -
    702A  LEU*     1.3    73.5    -      -       -      +
    704A  ARG*     1.3    58.4    +      -       -      +
    706A  VAL*     2.9     4.3    +      -       -      +
    707A  GLU*     2.6    45.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 704 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    700A  LYS*     3.3    42.3    +      -       -      +
    701A  HIS*     2.8    48.4    +      -       -      +
    703A  ASN*     1.3    78.3    -      -       -      +
    705A  GLN*     1.3    62.1    +      -       -      +
    707A  GLU*     3.4    11.5    +      -       -      +
    708A  ALA*     2.9    27.0    +      -       -      +
    747A  ALA      4.3     4.7    -      -       -      +
    750A  GLY      3.3    23.2    +      -       -      -
    751A  PHE*     4.0    15.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 705 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    665A  HIS*     2.8    35.5    +      -       -      -
    669A  TRP*     3.2    15.5    +      -       +      -
    698A  TYR*     4.0    10.3    +      -       -      -
    701A  HIS*     3.1    26.7    +      -       -      +
    702A  LEU*     3.1    16.5    -      -       -      +
    704A  ARG*     1.3    76.5    -      -       -      +
    706A  VAL*     1.3    58.0    +      -       -      +
    708A  ALA*     3.5     2.6    -      -       -      +
    709A  MET*     3.0    34.2    +      -       -      +
    751A  PHE*     4.3     9.3    -      -       +      +
    752A  LEU*     3.7    32.7    +      -       -      +
    754A  PRO*     3.5    24.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 706 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119A  PHE*     3.4    38.8    -      -       +      +
    120A  ALA*     4.3     3.1    -      -       -      +
    668A  PHE*     3.9    19.1    -      -       +      -
    669A  TRP*     3.6    28.5    -      -       +      -
    672A  LYS*     4.1    15.5    -      -       -      +
    702A  LEU      2.8    20.1    +      -       -      +
    703A  ASN*     2.9     6.0    +      -       -      +
    705A  GLN*     1.3    74.4    -      -       -      +
    707A  GLU*     1.3    58.5    +      -       -      +
    709A  MET*     3.2     4.2    +      -       -      +
    710A  GLU*     2.9    37.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 707 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91A  ASP*     5.7     1.0    -      -       -      +
    119A  PHE*     3.6    26.7    -      -       +      -
    700A  LYS*     3.6    22.0    +      -       -      -
    703A  ASN*     2.6    27.7    +      -       -      +
    704A  ARG*     3.7    10.1    +      -       -      +
    706A  VAL*     1.3    71.1    -      -       -      +
    708A  ALA*     1.3    63.3    +      -       -      +
    710A  GLU*     3.0    16.1    +      -       -      +
    711A  LYS*     3.0    18.7    +      -       -      +
    747A  ALA*     4.8    16.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 708 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    704A  ARG      2.9    18.2    +      -       -      +
    705A  GLN      3.5     5.6    -      -       -      +
    707A  GLU*     1.3    76.5    -      -       -      +
    709A  MET*     1.3    63.3    +      -       +      +
    711A  LYS*     3.3     5.2    +      -       -      +
    712A  LEU*     3.2    21.1    +      -       -      +
    747A  ALA*     3.6    23.3    +      -       -      +
    748A  LEU*     3.8    13.2    -      -       +      +
    751A  PHE*     3.8    31.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 709 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    669A  TRP*     4.1    16.4    -      -       +      -
    705A  GLN      3.0    19.6    +      -       -      +
    706A  VAL*     3.2     5.4    +      -       -      +
    708A  ALA*     1.3    76.7    -      -       -      +
    710A  GLU*     1.3    66.0    -      -       -      +
    712A  LEU*     3.8     9.5    -      -       -      +
    713A  ILE*     2.8    33.6    +      -       -      +
    751A  PHE*     5.4     5.2    -      -       -      -
    754A  PRO*     4.6     7.6    -      -       +      -
    801A  PHE*     3.6    15.0    -      -       +      -
    841A  ILE*     3.3    44.9    -      -       +      -
    847A  LEU*     3.4    45.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 710 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93A  ARG*     6.4     1.1    -      -       -      -
    119A  PHE*     4.8     9.6    -      -       +      -
    672A  LYS*     5.3     4.0    +      -       -      -
    706A  VAL*     2.9    30.4    +      -       +      +
    707A  GLU*     3.0    13.2    +      -       -      +
    709A  MET*     1.3    80.3    -      -       -      +
    711A  LYS*     1.3    62.6    +      -       +      +
    713A  ILE*     3.3    17.9    +      -       -      +
    714A  ASN*     3.1    22.9    +      -       -      +
    841A  ILE*     6.0     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 711 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8A  GLY*     3.2    27.3    -      -       -      +
     90A  CYS      4.5     0.6    +      -       -      -
     91A  ASP*     2.8    31.2    +      -       -      +
    707A  GLU*     3.0    15.0    +      -       +      +
    708A  ALA      3.6     8.1    -      -       -      +
    709A  MET      3.3     0.2    -      -       -      -
    710A  GLU*     1.3    73.0    -      -       +      +
    712A  LEU*     1.3    66.5    -      -       -      +
    714A  ASN*     3.1     7.5    +      -       -      +
    715A  LEU*     2.9    24.7    +      -       -      +
    743A  ASP*     3.5    28.6    +      -       -      -
    744A  PHE*     3.9    37.9    -      -       +      -
    747A  ALA*     3.8    17.5    -      -       +      -
    748A  LEU*     4.3     7.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 712 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    708A  ALA      3.2     5.8    +      -       -      +
    709A  MET*     3.8    14.4    -      -       -      +
    711A  LYS*     1.3    79.1    -      -       -      +
    713A  ILE*     1.3    61.3    +      -       -      +
    715A  LEU*     4.5     3.6    -      -       +      -
    716A  THR*     2.8    31.4    +      -       -      +
    739A  MET*     5.9     1.8    -      -       +      -
    744A  PHE*     4.9     4.5    -      -       +      -
    748A  LEU*     3.7    39.3    -      -       +      -
    751A  PHE*     6.0     1.3    -      -       +      -
    779A  LEU*     4.5    12.1    -      -       +      -
    781A  LEU*     3.7    30.3    -      -       +      -
    783A  TRP*     5.5     1.3    -      -       +      -
    801A  PHE*     3.5    44.2    -      -       +      -
    847A  LEU*     5.2     2.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 713 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    709A  MET      2.8    25.7    +      -       -      +
    710A  GLU*     3.9    18.2    -      -       -      +
    711A  LYS      3.3     0.4    -      -       -      -
    712A  LEU*     1.3    74.5    -      -       -      +
    714A  ASN*     1.3    58.1    +      -       -      +
    716A  THR*     3.3     6.0    +      -       -      -
    717A  ASP*     2.9    38.6    +      -       -      +
    801A  PHE*     3.6    11.9    -      -       +      -
    803A  ASN*     3.9    17.5    -      -       -      +
    841A  ILE*     3.9    16.6    -      -       +      +
    842A  GLY*     6.0     1.6    -      -       -      -
    845A  VAL*     3.5    29.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 714 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8A  GLY      3.7    16.1    +      -       -      +
      9A  GLU*     3.4    24.3    +      -       +      +
     14A  HIS*     2.9    50.1    +      -       -      +
     15A  LEU*     5.0     2.1    -      -       -      +
    710A  GLU      3.1    13.8    +      -       -      +
    711A  LYS*     3.1     7.6    +      -       -      +
    713A  ILE*     1.3    77.0    -      -       -      +
    715A  LEU*     1.3    65.4    +      -       -      +
    717A  ASP*     3.4     6.2    +      -       -      +
    718A  ILE*     3.3    26.7    +      -       -      +
    744A  PHE*     6.4     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 715 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    711A  LYS      2.9    15.7    +      -       -      +
    712A  LEU*     3.8     7.0    -      -       +      +
    714A  ASN*     1.3    74.4    +      -       -      +
    716A  THR*     1.3    66.9    +      -       +      +
    718A  ILE*     2.9    29.0    +      -       +      +
    719A  LEU*     3.3    19.8    +      -       +      +
    734A  PHE*     3.8    27.4    -      -       +      -
    735A  LEU*     3.8    25.8    -      -       +      +
    738A  GLN*     4.6     8.3    -      -       +      -
    739A  MET*     4.2    11.9    -      -       +      -
    744A  PHE*     3.6    34.5    -      -       +      -
    779A  LEU*     4.4    10.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 716 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    712A  LEU      2.8    20.3    +      -       -      +
    713A  ILE      3.3     1.6    +      -       -      -
    715A  LEU*     1.3    78.7    -      -       -      +
    717A  ASP*     1.3    55.3    +      -       -      +
    719A  LEU*     3.5    10.6    +      -       -      +
    720A  LYS*     3.0    32.9    +      -       -      +
    777A  ARG*     4.0    14.3    -      -       -      +
    779A  LEU*     3.6    36.3    -      -       +      -
    801A  PHE*     3.5    17.0    -      -       +      +
    803A  ASN*     2.9    37.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 717 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14A  HIS*     3.7    23.6    -      -       +      -
    713A  ILE*     2.9    26.8    +      -       -      +
    714A  ASN*     3.4    15.0    +      -       -      +
    715A  LEU      3.0     0.2    +      -       -      -
    716A  THR*     1.3    74.6    +      -       -      +
    718A  ILE*     1.3    56.7    +      -       -      +
    720A  LYS*     2.9     7.6    +      -       -      +
    721A  GLN*     2.7    47.8    +      -       -      +
    803A  ASN*     2.9    20.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 718 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14A  HIS*     3.8    24.7    +      -       +      -
     15A  LEU*     3.8    29.4    -      -       +      -
    714A  ASN*     3.3    26.7    -      -       -      +
    715A  LEU*     2.9    16.0    +      -       +      +
    717A  ASP*     1.3    77.6    -      -       -      +
    719A  LEU*     1.3    63.5    +      -       -      +
    721A  GLN      3.2    19.2    +      -       -      +
    722A  GLU*     3.6    25.0    -      -       +      +
    724A  LYS*     3.3    22.7    -      -       +      +
    734A  PHE*     3.6    29.2    -      -       +      -
    738A  GLN*     5.8     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 719 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    715A  LEU*     3.3    24.7    +      -       +      +
    716A  THR*     3.8    13.0    -      -       -      +
    717A  ASP      3.2     0.6    -      -       -      -
    718A  ILE*     1.3    75.4    -      -       -      +
    720A  LYS*     1.3    62.3    +      -       -      +
    724A  LYS*     3.6    26.1    -      -       +      +
    725A  ASP*     3.7     7.6    -      -       -      +
    731A  GLN*     3.8    35.0    +      -       +      +
    734A  PHE*     3.5    32.5    -      -       +      -
    735A  LEU*     4.3     7.0    -      -       +      +
    771A  ILE*     3.8    28.0    -      -       +      -
    777A  ARG*     4.2    15.5    -      -       +      +
    779A  LEU*     4.3     7.2    -      -       +      -
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Residues in contact with LYS 720 (chain A). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
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    716A  THR*     3.0    22.8    +      -       -      +
    717A  ASP*     2.9     8.5    +      -       -      +
    719A  LEU*     1.3    76.8    -      -       -      +
    721A  GLN*     1.3    66.1    +      -       +      +
    725A  ASP*     3.6    15.7    -      -       -      +
    776A  LYS*     3.1    29.0    -      -       +      +
    777A  ARG*     4.0    21.8    -      -       +      +
    803A  ASN*     2.9    40.2    +      -       +      +
    804A  GLY*     3.4    11.7    -      -       -      -
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Residues in contact with GLN 721 (chain A). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
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     14A  HIS*     3.5    23.7    +      -       -      +
    717A  ASP*     2.7    20.8    +      -       -      +
    718A  ILE      3.2     4.0    -      -       -      +
    719A  LEU      4.1     0.2    -      -       -      +
    720A  LYS*     1.3    89.1    -      -       +      +
    722A  GLU*     1.3    73.4    +      -       +      +
    723A  LYS*     2.5     6.6    +      -       -      -
    724A  LYS      2.7    12.6    +      -       -      -
    725A  ASP*     4.3     4.2    +      -       -      +
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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
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  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) +   -    +    +   +   +    +    -
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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