Contacts of the helix formed by residues 83 - 105 (chain A) in PDB entry 2QQ6


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 GLY 83 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     82A  ALA*     1.3    83.0    -      -       -      +
     84A  ALA*     1.3    66.7    +      -       -      +
     85A  VAL      3.3     1.1    -      -       -      -
     86A  ILE*     2.8     5.6    +      -       -      +
     87A  THR*     2.8    25.4    +      -       -      -
    269A  TYR*     3.3    31.0    -      -       -      -
     79B  GLY*     4.5     2.9    -      -       -      -
     82B  ALA      3.1     7.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 84 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39A  SER*     4.9    11.0    -      -       -      +
     40A  ALA*     5.8     3.4    -      -       +      -
     45A  ILE*     5.6     5.8    -      -       +      +
     48A  ILE*     3.9    19.7    -      -       +      -
     82A  ALA*     4.7     1.0    -      -       -      +
     83A  GLY*     1.3    71.2    -      -       -      +
     85A  VAL*     1.3    59.7    +      -       -      +
     86A  ILE      2.9     0.3    +      -       -      -
     87A  THR*     2.9     8.4    +      -       -      -
     88A  ALA*     2.8    31.7    +      -       -      +
     48B  ILE*     5.3     3.6    -      -       +      -
     79B  GLY*     4.5     8.1    +      -       -      -
     82B  ALA      4.8     0.6    +      -       -      -
     84B  ALA*     4.2    17.2    -      -       +      +
     85B  VAL*     4.6    14.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 85 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48A  ILE*     4.1    23.7    -      -       +      +
     75A  ASN*     3.7    35.0    -      -       +      +
     78A  THR      3.5    17.0    -      -       -      +
     79A  GLY*     2.9    30.1    -      -       -      +
     80A  GLY*     3.9     5.8    -      -       -      -
     82A  ALA*     4.9     0.6    -      -       -      +
     83A  GLY      3.3     1.2    -      -       -      +
     84A  ALA*     1.3    79.8    -      -       -      +
     86A  ILE*     1.3    58.1    +      -       +      +
     88A  ALA*     3.7     2.8    -      -       -      +
     89A  LEU*     3.1    28.2    +      -       +      +
     40B  ALA*     4.5    10.3    -      -       +      -
     84B  ALA*     4.6    12.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 86 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68A  TYR*     4.4     7.6    -      -       -      +
     72A  ARG*     5.7     1.1    -      -       +      -
     80A  GLY      3.3    26.0    -      -       -      +
     81A  GLN      3.2    14.4    -      -       -      +
     82A  ALA      3.2    24.2    -      -       -      +
     83A  GLY      2.8     8.4    +      -       -      +
     85A  VAL*     1.3    79.4    -      -       +      +
     87A  THR*     1.3    54.4    +      -       -      +
     88A  ALA      3.1     1.3    -      -       -      -
     89A  LEU*     3.0    12.7    +      -       +      +
     90A  SER*     2.7    31.7    +      -       -      -
    269A  TYR*     4.2     7.0    -      -       +      -
    270A  THR*     3.6    18.2    -      -       +      -
    292A  LYS      4.0     2.7    -      -       -      +
    293A  CYS      3.1    34.1    -      -       -      +
    294A  GLY*     3.9     4.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 87 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36A  CYS*     3.6     8.3    -      -       +      -
     37A  TYR*     3.6    32.5    -      -       +      +
     39A  SER*     4.3    13.0    +      -       -      -
     45A  ILE*     4.7     4.9    -      -       +      -
     83A  GLY      2.8    20.4    +      -       -      -
     84A  ALA*     3.6     9.3    -      -       -      -
     86A  ILE*     1.3    72.9    -      -       -      +
     88A  ALA*     1.3    63.3    +      -       -      +
     90A  SER*     3.0    18.8    +      -       -      -
     91A  GLY      3.4     4.7    +      -       -      -
    269A  TYR*     3.7     4.3    +      -       -      -
    291A  ALA      3.4    18.1    -      -       -      +
    292A  LYS*     3.2    27.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 88 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36A  CYS*     3.9     1.7    -      -       -      -
     45A  ILE*     3.9    18.8    -      -       +      +
     48A  ILE*     3.4    37.2    -      -       +      -
     49A  VAL*     3.6    19.2    -      -       +      +
     84A  ALA      2.8    12.0    +      -       -      +
     85A  VAL      3.7     2.2    -      -       -      +
     87A  THR*     1.3    80.6    -      -       -      +
     89A  LEU*     1.3    60.7    +      -       +      +
     91A  GLY      3.6     5.2    +      -       -      -
     92A  ILE*     3.4    21.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 89 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48A  ILE*     6.2     1.3    -      -       +      -
     52A  MSE      4.0    13.9    -      -       +      -
     68A  TYR*     4.0    25.1    -      -       +      +
     71A  MSE      3.6    42.3    -      -       +      +
     72A  ARG*     3.9    33.0    -      -       +      +
     75A  ASN*     4.7     4.5    -      -       -      +
     80A  GLY*     6.0     0.4    -      -       -      +
     85A  VAL*     3.1    24.0    +      -       +      +
     86A  ILE*     3.0    16.5    +      -       +      +
     88A  ALA*     1.3    79.3    -      -       +      +
     90A  SER*     1.3    65.1    +      -       -      +
     92A  ILE*     3.3     6.7    +      -       +      +
     93A  GLU*     3.0    26.3    +      -       -      +
    294A  GLY      5.1     0.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 90 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35A  GLU      4.5     0.9    -      -       -      -
     86A  ILE      2.7    12.3    +      -       -      -
     87A  THR      3.0    10.7    +      -       -      -
     89A  LEU*     1.3    78.1    -      -       -      +
     91A  GLY*     1.3    60.0    +      -       -      +
     93A  GLU*     3.5     3.1    +      -       -      +
     94A  THR*     2.8    28.5    +      -       -      -
    290A  VAL      3.5     7.0    -      -       -      -
    291A  ALA*     3.4    23.8    -      -       -      -
    292A  LYS      3.3     8.5    -      -       -      -
    294A  GLY*     2.6    30.0    +      -       -      -
    295A  GLY*     3.7    12.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 91 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23A  VAL*     4.2     6.2    -      -       -      +
     34A  GLY*     3.3    13.4    -      -       -      -
     35A  GLU      3.3    26.4    +      -       -      -
     36A  CYS*     3.6    12.7    -      -       -      -
     87A  THR      3.4     6.9    +      -       -      -
     88A  ALA      3.6     0.8    +      -       -      -
     89A  LEU      3.3     0.6    -      -       -      -
     90A  SER*     1.3    75.9    -      -       -      +
     92A  ILE*     1.3    65.0    +      -       -      +
     94A  THR*     3.3     2.7    +      -       -      -
     95A  ALA*     3.1    18.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 92 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9A  VAL*     5.7     0.7    -      -       +      -
     23A  VAL*     4.1     8.3    -      -       +      +
     25A  VAL*     4.7     7.4    -      -       +      -
     49A  VAL*     3.7    32.5    -      -       +      +
     52A  MSE      3.9    26.5    -      -       +      -
     56A  LEU*     3.7    21.8    -      -       +      -
     71A  MSE      3.5    25.8    -      -       +      -
     88A  ALA*     3.4    17.7    -      -       +      +
     89A  LEU*     3.3    10.7    +      -       +      +
     91A  GLY*     1.3    71.9    -      -       -      +
     93A  GLU*     1.3    67.5    +      -       -      +
     95A  ALA*     2.8    19.7    +      -       -      +
     96A  LEU*     2.9    19.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 93 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64A  VAL*     4.0    12.1    -      -       +      +
     68A  TYR*     4.4    21.7    -      -       +      -
     71A  MSE      4.4     2.0    -      -       +      +
     89A  LEU      3.0    15.2    +      -       -      +
     90A  SER      3.7     3.4    -      -       -      +
     92A  ILE*     1.3    78.8    -      -       -      +
     94A  THR*     1.3    64.0    +      -       -      +
     96A  LEU*     3.3    12.8    +      -       +      +
     97A  TRP*     2.7    62.4    +      -       +      +
    294A  GLY      3.1    19.6    -      -       -      +
    295A  GLY*     3.3     7.5    -      -       -      -
    296A  LEU*     2.9    16.0    +      -       -      +
    297A  ALA*     3.1    26.6    +      -       -      +
    298A  GLU      3.7     0.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 94 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33A  LEU      3.9    12.1    -      -       -      +
     34A  GLY*     4.0     7.9    -      -       -      -
     35A  GLU      4.6     5.9    +      -       -      +
     90A  SER      2.8    18.0    +      -       -      -
     91A  GLY*     3.5     8.9    -      -       -      -
     92A  ILE      3.1     0.6    -      -       -      -
     93A  GLU*     1.3    80.2    +      -       -      +
     95A  ALA*     1.3    53.3    +      -       -      +
     97A  TRP*     3.0     8.8    +      -       -      +
     98A  ASP*     2.8    32.9    +      -       -      +
    290A  VAL*     5.3     1.9    +      -       -      +
    291A  ALA*     5.6     2.3    -      -       -      -
    295A  GLY*     4.7     1.7    -      -       -      -
    296A  LEU*     3.8    15.7    -      -       +      +
    322A  VAL*     5.7     1.8    -      -       +      -
    323A  GLY*     6.0     0.7    -      -       -      -
    326A  ALA*     3.8    28.3    -      -       +      +
    375A  LEU*     4.4    10.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 95 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23A  VAL      3.8    18.2    -      -       -      +
     25A  VAL*     3.4    26.5    -      -       +      -
     32A  GLY*     3.5    10.9    -      -       -      +
     33A  LEU      3.6    13.4    +      -       -      -
     91A  GLY      3.1     9.1    +      -       -      +
     92A  ILE*     2.8    10.0    +      -       -      +
     94A  THR*     1.3    78.8    -      -       -      +
     96A  LEU*     1.3    51.1    +      -       -      +
     98A  ASP*     3.0     4.2    +      -       -      +
     99A  LEU*     2.7    37.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 96 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6A  ILE*     4.7     9.9    -      -       +      -
     25A  VAL*     3.9    27.4    -      -       +      -
     56A  LEU*     4.5     8.1    -      -       +      -
     61A  PRO*     4.3     6.7    -      -       +      +
     64A  VAL*     4.1    18.8    -      -       +      +
     67A  LEU*     3.7    42.4    -      -       +      -
     68A  TYR      5.4     0.2    -      -       -      +
     71A  MSE      4.4    14.4    -      -       +      -
     92A  ILE*     2.9    19.5    +      -       +      +
     93A  GLU*     3.5    15.0    -      -       +      +
     95A  ALA*     1.3    75.3    -      -       -      +
     97A  TRP*     1.3    57.5    +      -       -      +
     99A  LEU*     3.7     9.6    -      -       +      +
    100A  ALA*     2.8    33.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 97 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62A  ARG      5.7     0.9    -      -       -      -
     64A  VAL*     3.3    36.8    -      -       +      +
     65A  GLU*     4.8    12.3    -      -       +      -
     93A  GLU*     2.7    51.8    +      -       -      -
     94A  THR      3.3     8.1    -      -       -      +
     96A  LEU*     1.3    76.9    -      -       -      +
     98A  ASP*     1.3    62.3    +      -       -      +
    100A  ALA*     3.9     1.8    -      -       -      +
    101A  GLY*     3.0    21.1    +      -       -      -
    108A  VAL*     3.9    16.2    -      -       +      +
    111A  LEU*     3.7    54.6    -      -       +      +
    112A  LEU*     4.1    16.6    -      -       +      -
    296A  LEU*     3.9    25.5    -      -       +      +
    297A  ALA*     3.7    21.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 98 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31A  HIS*     5.7     0.2    +      -       -      -
     32A  GLY*     3.3     4.6    -      -       -      -
     33A  LEU*     2.5    36.8    +      -       -      +
     94A  THR      2.8    12.7    +      -       -      +
     95A  ALA      3.2     8.3    -      -       -      +
     97A  TRP*     1.3    76.4    -      -       -      +
     99A  LEU*     1.3    62.2    +      -       -      +
    101A  GLY*     3.4     1.0    +      -       -      -
    102A  LYS*     3.1    36.6    +      -       -      +
    108A  VAL*     4.4     6.0    -      -       -      +
    374A  GLY      2.8    24.6    -      -       -      +
    375A  LEU*     3.3    25.5    -      -       +      +
    377A  LEU*     5.5     2.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 99 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6A  ILE*     5.0     0.2    -      -       +      -
     25A  VAL*     3.7    28.9    -      -       +      +
     26A  TRP      4.7     0.2    -      -       -      -
     27A  ALA*     3.9     8.5    -      -       +      -
     30A  GLU*     3.8    12.1    -      -       +      -
     31A  HIS*     3.5    35.9    -      -       -      +
     32A  GLY*     3.7     8.0    -      -       -      -
     61A  PRO*     3.5    28.9    -      -       +      -
     95A  ALA      2.7    19.5    +      -       -      +
     96A  LEU*     3.7     6.1    -      -       +      +
     98A  ASP*     1.3    70.9    -      -       -      +
    100A  ALA*     1.3    60.5    +      -       -      +
    102A  LYS*     3.3     3.1    +      -       -      +
    103A  LEU*     2.8    56.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 100 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61A  PRO*     3.9    18.8    -      -       -      +
     62A  ARG*     4.0     9.6    -      -       -      +
     64A  VAL*     4.6     6.3    -      -       +      -
     96A  LEU      2.8    21.0    +      -       -      +
     97A  TRP*     3.9     5.6    -      -       +      +
     99A  LEU*     1.3    74.3    -      -       -      +
    101A  GLY*     1.3    62.8    +      -       -      +
    103A  LEU*     3.8     8.0    -      -       -      +
    104A  GLN*     2.9    44.0    +      -       -      +
    111A  LEU*     4.1     9.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 101 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97A  TRP      3.0    13.2    +      -       -      -
     98A  ASP      3.8     2.7    -      -       -      -
    100A  ALA*     1.3    78.6    -      -       -      +
    102A  LYS*     1.3    51.2    +      -       -      +
    104A  GLN*     3.6     0.8    -      -       -      -
    105A  GLY      2.7    13.2    +      -       -      -
    106A  VAL*     2.6    46.9    +      -       -      -
    108A  VAL      5.1     0.2    -      -       -      -
    111A  LEU*     3.7    15.2    -      -       -      +
    374A  GLY*     3.8     7.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 102 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30A  GLU*     3.9    24.1    +      -       -      +
     31A  HIS*     2.6    54.6    +      -       -      -
     98A  ASP*     3.1    35.5    +      -       -      +
     99A  LEU*     3.8     3.1    -      -       -      +
    101A  GLY*     1.3    72.8    -      -       -      +
    103A  LEU*     1.3    66.7    +      -       -      +
    105A  GLY*     3.0    12.6    +      -       -      -
    373A  PRO*     3.8    30.6    -      -       +      +
    374A  GLY*     4.1     3.8    -      -       -      +
    377A  LEU      5.7     5.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 103 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4A  PRO*     4.1    27.4    -      -       +      -
     27A  ALA*     4.1    12.1    -      -       +      +
     30A  GLU*     4.2    24.0    -      -       +      +
     61A  PRO*     4.2    13.5    -      -       +      -
     62A  ARG*     5.2     6.3    -      -       +      -
     99A  LEU*     2.8    53.0    +      -       +      +
    100A  ALA*     3.8     5.8    -      -       -      +
    102A  LYS*     1.3    76.3    -      -       -      +
    104A  GLN*     1.3    63.5    +      -       +      +
    105A  GLY      3.5     0.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 104 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62A  ARG*     3.2    47.6    +      -       +      +
    100A  ALA*     2.9    32.5    +      -       -      +
    101A  GLY*     4.4     1.3    -      -       -      +
    103A  LEU*     1.3    76.0    -      -       -      +
    105A  GLY*     1.3    65.4    +      -       -      +
    106A  VAL*     3.5    14.2    -      -       +      +
    111A  LEU*     4.2    17.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 105 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101A  GLY      2.7     9.1    +      -       -      -
    102A  LYS      3.0    13.1    +      -       -      -
    103A  LEU      3.2     0.6    +      -       -      -
    104A  GLN*     1.3    80.7    -      -       -      +
    106A  VAL*     1.3    65.1    +      -       -      +
    373A  PRO*     3.8    14.6    -      -       -      -
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il