Contacts of the helix formed by residues 49 - 76 (chain A) in PDB entry 4MT7


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 GLN 49 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45A  GLN*     3.6    26.2    -      -       +      +
     46A  ASN*     3.5    29.2    +      -       -      +
     47A  ARG      3.1     1.4    -      -       -      +
     48A  ASP*     1.3    79.8    -      -       -      +
     50A  MET*     1.3    68.5    +      -       -      +
     51A  ARG      3.2     2.2    -      -       -      -
     52A  ALA*     2.9    26.6    +      -       -      +
     53A  ASN*     2.4    42.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 50 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46A  ASN*     3.6    26.5    -      -       -      +
     47A  ARG*     3.4    19.2    -      -       -      +
     49A  GLN*     1.3    93.4    -      -       -      +
     51A  ARG*     1.3    56.3    +      -       -      +
     53A  ASN*     3.0    20.5    +      -       +      +
     54A  VAL*     2.9    30.9    +      -       +      +
    202A  GLU*     5.9     0.4    -      -       -      +
    206A  TYR*     3.4    46.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 51 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47A  ARG      3.5     6.6    +      -       -      +
     48A  ASP*     4.6     3.4    -      -       -      +
     50A  MET*     1.3    79.7    -      -       -      +
     52A  ALA*     1.3    55.8    +      -       -      +
     54A  VAL*     3.2     5.9    +      -       -      +
     55A  ILE*     2.9    43.1    +      -       +      +
    123A  HIS*     2.7    38.1    +      -       +      +
    125A  SER      2.7    27.9    +      -       -      -
    203A  LEU*     3.7    24.3    -      -       +      +
    206A  TYR*     3.1    30.6    -      -       -      +
    207A  THR*     2.5    40.2    +      -       -      +
    208A  ALA      5.8     0.2    -      -       -      +
    211A  HIS*     3.4    19.9    +      -       -      -
    213A  ASP*     2.7    20.4    +      -       -      -
    217A  VAL*     4.5     1.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 52 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48A  ASP      4.7     0.2    -      -       -      +
     49A  GLN*     2.9    18.3    +      -       -      +
     51A  ARG*     1.3    77.7    -      -       -      +
     53A  ASN*     1.3    61.0    +      -       -      +
     55A  ILE*     3.8     2.7    -      -       -      +
     56A  ASN*     3.0    39.7    +      -       -      +
    122A  PRO*     4.1    10.5    -      -       +      -
    123A  HIS*     3.6    34.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 53 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49A  GLN*     2.4    43.1    +      -       -      -
     50A  MET*     3.0    27.9    +      -       +      +
     52A  ALA*     1.3    77.4    -      -       -      +
     54A  VAL*     1.3    61.1    +      -       +      +
     56A  ASN*     3.4     5.9    +      -       -      +
     57A  GLU*     2.9    31.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 54 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50A  MET*     2.9    17.0    +      -       +      +
     51A  ARG*     3.6     7.0    -      -       -      +
     53A  ASN*     1.3    73.9    -      -       +      +
     55A  ILE*     1.3    60.4    +      -       -      +
     57A  GLU*     3.2    13.0    +      -       -      +
     58A  ILE*     2.9    41.2    +      -       +      +
    199A  GLN      4.2     3.1    -      -       -      +
    202A  GLU*     3.5    35.4    -      -       +      +
    203A  LEU*     3.6    38.4    -      -       +      +
    206A  TYR*     4.2     9.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 55 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51A  ARG*     2.9    47.1    +      -       +      +
     52A  ALA*     3.8     4.7    -      -       -      +
     54A  VAL*     1.3    74.3    -      -       -      +
     56A  ASN*     1.3    58.3    +      -       -      +
     58A  ILE*     3.3     6.4    +      -       -      +
     59A  MET*     3.0    31.7    +      -       +      +
    117A  TYR*     4.1    19.1    -      -       +      -
    122A  PRO      3.8    23.1    -      -       -      +
    123A  HIS*     4.6     0.2    -      -       -      -
    125A  SER*     4.1    22.2    -      -       -      +
    127A  ILE*     4.0    22.7    -      -       +      -
    203A  LEU*     3.6    21.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 56 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52A  ALA*     3.0    27.7    +      -       -      +
     53A  ASN*     3.9     5.8    +      -       -      +
     55A  ILE*     1.3    74.0    -      -       -      +
     57A  GLU*     1.3    62.0    +      -       -      +
     59A  MET*     3.5     5.9    +      -       -      +
     60A  SER*     2.9    27.9    +      -       -      -
     63A  ARG*     4.9     3.2    +      -       -      +
    117A  TYR*     2.8    34.0    +      -       -      -
    122A  PRO*     4.1    16.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 57 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53A  ASN      2.9    19.3    +      -       -      +
     54A  VAL*     3.6    15.3    -      -       -      +
     56A  ASN*     1.3    73.6    -      -       -      +
     58A  ILE*     1.3    68.2    +      -       -      +
     60A  SER*     3.1     7.2    +      -       -      -
     61A  THR*     2.9    40.9    +      -       +      +
    199A  GLN*     3.2    29.5    +      -       -      +
    202A  GLU*     5.5     3.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 58 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54A  VAL*     2.9    38.0    +      -       +      +
     55A  ILE*     3.5     5.8    -      -       -      +
     57A  GLU*     1.3    77.6    -      -       -      +
     59A  MET*     1.3    65.0    -      -       +      +
     61A  THR*     2.8    22.5    +      -       -      -
     62A  GLU*     2.9    22.9    +      -       +      +
    113A  LEU*     4.7    12.3    -      -       +      -
    127A  ILE*     4.3    26.7    -      -       +      -
    131A  PHE*     5.5     9.2    -      -       +      -
    196A  TYR*     6.1     1.8    -      -       +      -
    199A  GLN*     3.6    41.3    -      -       +      +
    200A  LEU*     5.2     4.9    -      -       +      -
    203A  LEU*     4.7     4.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 59 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55A  ILE*     3.0    23.1    +      -       +      +
     56A  ASN*     3.7     7.2    -      -       -      +
     58A  ILE*     1.3    78.3    -      -       +      +
     60A  SER*     1.3    63.1    +      -       -      +
     62A  GLU*     3.3     5.0    +      -       -      +
     63A  ARG*     2.9    46.7    +      -       -      +
    113A  LEU*     3.8    38.6    -      -       -      +
    114A  GLU*     3.5    37.9    -      -       -      +
    117A  TYR*     3.7    43.1    -      -       +      -
    127A  ILE*     6.2     2.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 60 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56A  ASN      2.9    14.7    +      -       -      -
     57A  GLU*     3.1    12.8    +      -       -      -
     59A  MET*     1.3    75.4    -      -       -      +
     61A  THR*     1.3    64.8    +      -       -      +
     63A  ARG*     2.9    16.9    +      -       -      +
     64A  HIS*     2.9    49.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 61 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57A  GLU*     2.9    36.0    +      -       +      +
     58A  ILE      2.8    15.4    +      -       -      -
     60A  SER*     1.3    73.0    -      -       -      +
     62A  GLU*     1.3    59.4    +      -       -      +
     64A  HIS*     4.0     8.6    -      -       -      +
     65A  TYR*     2.9    30.8    +      -       -      +
    192A  LYS*     3.3    21.6    +      -       -      -
    199A  GLN*     3.5    11.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 62 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58A  ILE*     2.9    28.0    +      -       +      +
     59A  MET*     3.7     7.2    -      -       -      +
     61A  THR*     1.3    77.2    +      -       -      +
     63A  ARG*     1.3    60.6    +      -       +      +
     65A  TYR*     3.8     2.3    -      -       -      +
     66A  ILE*     2.9    30.7    +      -       -      +
    106A  GLN*     2.9    18.3    +      -       -      -
    109A  PHE*     3.7     9.8    -      -       -      -
    110A  VAL*     3.8    18.1    -      -       +      +
    113A  LEU*     4.3    18.6    -      -       +      -
    131A  PHE*     6.4     0.2    -      -       +      -
    192A  LYS*     2.9    33.8    +      -       -      +
    196A  TYR*     2.6    33.6    +      -       +      -
    199A  GLN*     5.6     0.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 63 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56A  ASN*     4.9     2.8    +      -       -      -
     59A  MET*     2.9    45.2    +      -       -      +
     60A  SER*     2.9    12.0    +      -       -      +
     62A  GLU*     1.3    75.1    -      -       +      +
     64A  HIS*     1.3    62.1    +      -       +      +
     66A  ILE*     3.1    12.4    -      -       +      +
     67A  LYS*     2.9    28.5    +      -       -      +
    110A  VAL*     5.2     7.9    -      -       +      -
    114A  GLU*     2.7    45.7    +      -       -      +
    117A  TYR*     6.0     1.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 64 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60A  SER*     2.9    42.7    +      -       -      +
     61A  THR*     4.0     7.0    +      -       -      +
     63A  ARG*     1.3    76.5    -      -       +      +
     65A  TYR*     1.3    53.6    +      -       -      +
     67A  LYS*     3.2    18.6    +      -       +      +
     68A  HIS*     2.4    52.7    +      +       +      -
----------------------------------------------------------
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Residues in contact with TYR 65 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61A  THR      2.9    20.8    +      -       -      +
     62A  GLU*     3.8     4.0    -      -       -      +
     63A  ARG      3.3     0.2    -      -       -      -
     64A  HIS*     1.3    76.2    -      -       -      +
     66A  ILE*     1.3    58.9    +      -       -      +
     68A  HIS*     3.2    11.2    +      -       +      +
     69A  LEU*     2.9    43.9    +      -       +      +
    102A  ILE*     3.9     6.2    -      -       -      +
    106A  GLN*     3.3    43.3    -      -       +      -
    141A  TYR*     2.6    20.9    +      -       -      -
    188A  THR*     3.8    39.0    -      -       -      -
    189A  PRO*     3.2    21.8    -      -       +      +
    192A  LYS*     3.8    30.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 66 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62A  GLU      2.9    16.5    +      -       -      +
     63A  ARG*     3.1    25.4    -      -       +      +
     65A  TYR*     1.3    82.1    -      -       -      +
     67A  LYS*     1.3    57.1    +      -       -      +
     69A  LEU*     3.4     6.0    +      -       -      +
     70A  LYS*     2.9    27.0    +      -       -      +
    103A  TYR*     3.9    19.7    -      -       +      -
    106A  GLN*     3.8    17.7    -      -       +      +
    107A  MET*     3.6    35.2    -      -       +      +
    110A  VAL*     4.1    19.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 67 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63A  ARG      2.9    15.9    +      -       -      +
     64A  HIS*     3.3    22.9    -      -       +      +
     66A  ILE*     1.3    76.3    -      -       +      +
     68A  HIS*     1.3    65.2    +      -       +      +
     70A  LYS*     3.3    10.6    +      -       +      +
     71A  ASP*     2.9    59.4    +      -       -      +
    175A  GLN      5.0     1.6    +      -       -      -
    176A  GLN      4.5    11.5    +      -       -      -
    177A  MET*     5.8     0.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 68 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64A  HIS*     2.4    50.6    +      +       +      -
     65A  TYR*     3.2    12.6    +      -       +      +
     67A  LYS*     1.3    80.2    -      -       +      +
     69A  LEU*     1.3    62.3    +      -       -      +
     71A  ASP*     3.4     9.1    +      -       -      +
     72A  ILE*     2.9    35.2    +      -       +      +
    178A  ILE*     5.8     5.3    -      -       -      +
    185A  PHE*     3.7    33.2    -      +       +      -
    188A  THR*     4.9    18.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 69 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65A  TYR*     2.9    51.8    +      -       +      +
     66A  ILE*     3.6     8.7    -      -       -      +
     68A  HIS*     1.3    78.8    -      -       -      +
     70A  LYS*     1.3    56.1    +      -       -      +
     72A  ILE*     3.2     6.6    +      -       +      +
     73A  CYS*     2.9    34.1    +      -       -      +
     99A  ILE*     3.7    33.4    -      -       +      +
    102A  ILE*     3.7    10.3    -      -       +      -
    103A  TYR*     3.7    37.9    -      -       +      -
    106A  GLN*     3.8    13.0    -      -       +      -
    188A  THR*     5.0     3.4    -      -       -      +
    189A  PRO*     4.5     2.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 70 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66A  ILE      2.9    12.7    +      -       -      +
     67A  LYS*     3.5    14.6    -      -       +      +
     68A  HIS      3.2     0.2    -      -       -      -
     69A  LEU*     1.3    76.9    -      -       -      +
     71A  ASP*     1.3    64.0    +      -       -      +
     73A  CYS*     4.4     0.2    -      -       -      +
     74A  GLU*     2.9    59.5    +      -       +      +
    103A  TYR*     3.4    32.6    -      -       +      +
    175A  GLN*     5.3     1.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 71 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67A  LYS*     2.9    50.7    +      -       -      +
     68A  HIS*     3.9    10.1    -      -       -      +
     70A  LYS*     1.3    81.1    -      -       -      +
     72A  ILE*     1.3    57.7    +      -       +      +
     75A  GLY*     2.9    25.5    +      -       -      -
     76A  TYR      3.7     0.3    +      -       -      -
    175A  GLN*     3.2    43.0    +      -       +      +
    176A  GLN      4.8     0.5    -      -       -      +
    177A  MET*     3.1    30.6    -      -       +      +
    185A  PHE*     5.7     1.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 72 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68A  HIS*     2.9    21.4    +      -       +      +
     69A  LEU*     3.6     7.2    -      -       +      +
     70A  LYS      3.1     0.2    -      -       -      -
     71A  ASP*     1.3    77.2    -      -       -      +
     73A  CYS*     1.3    64.0    +      -       -      +
     76A  TYR*     3.1    34.4    +      -       +      +
     77A  LEU*     3.1     8.8    +      -       -      +
     96A  PHE*     4.6    15.7    -      -       +      -
     99A  ILE*     4.0    35.4    -      -       +      -
    177A  MET*     5.8     0.2    -      -       +      -
    182A  ILE*     6.4     0.2    -      -       +      -
    185A  PHE*     3.2    49.6    -      -       +      +
    186A  LEU*     4.2    12.8    -      -       +      -
    188A  THR*     4.7     5.6    -      -       -      +
    189A  PRO*     5.7     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 73 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69A  LEU      2.9    21.0    +      -       -      +
     70A  LYS      4.4     0.4    -      -       -      +
     72A  ILE*     1.3    74.8    -      -       -      +
     74A  GLU*     1.3    57.8    +      -       -      +
     77A  LEU*     3.4    26.7    -      -       +      +
     78A  LYS*     3.5    10.4    +      -       -      +
     99A  ILE*     3.8    24.2    -      -       -      -
    100A  GLU*     3.7    39.7    -      -       +      +
    103A  TYR*     3.9    22.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 74 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70A  LYS*     2.9    46.3    +      -       +      +
     73A  CYS*     1.3    80.0    -      -       -      +
     75A  GLY*     1.3    62.8    +      -       -      +
     76A  TYR      3.6     0.2    -      -       -      -
     78A  LYS*     3.5    31.0    -      -       +      +
     79A  GLN*     4.6     6.8    +      -       -      -
    103A  TYR*     6.4     0.4    -      -       +      -
    175A  GLN*     3.6    23.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 75 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71A  ASP      2.9    19.8    +      -       -      -
     74A  GLU*     1.3    80.3    -      -       -      +
     76A  TYR*     1.3    62.5    +      -       -      +
     79A  GLN*     3.5    20.8    -      -       -      +
    171A  CYS*     3.8    16.3    -      -       -      +
    175A  GLN*     3.8    23.9    +      -       -      -
    177A  MET*     4.4     1.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 76 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71A  ASP      4.3     3.1    -      -       -      -
     72A  ILE*     3.1    19.5    +      -       +      +
     75A  GLY*     1.3    77.8    -      -       -      +
     77A  LEU*     1.3    67.0    +      -       -      +
     78A  LYS      3.4     0.9    -      -       -      -
     79A  GLN*     3.4     4.3    +      -       -      +
     80A  CYS*     3.1    29.8    +      -       -      -
     96A  PHE*     3.9    17.7    -      +       +      -
    168A  PHE*     3.8    38.5    +      +       +      +
    171A  CYS*     3.8    14.6    -      -       +      -
    172A  ARG*     3.1    33.2    -      -       +      +
    177A  MET*     3.4    31.4    -      -       +      -
    180A  ILE      4.5     1.2    +      -       -      -
    181A  ALA*     5.3     0.2    -      -       -      -
    182A  ILE*     3.7    45.9    +      -       +      +
    185A  PHE*     5.2     6.1    -      +       +      -
----------------------------------------------------------
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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