Contacts of the helix formed by residues 3 - 27 (chain B) in PDB entry 3Q02


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 HIS 3 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    210A  TYR*     3.0    27.6    +      +       -      -
    212A  GLU*     3.7     5.9    +      -       -      +
    222A  ASP*     4.1     0.9    -      -       -      -
    241A  TYR*     5.7     1.0    -      -       -      -
    271A  ARG*     3.8    24.0    +      -       -      +
    350A  GLU*     3.2    28.0    +      -       +      +
    351A  GLU      5.2     1.4    +      -       -      -
    352A  ILE*     4.1    16.7    -      -       +      +
      1B  VAL      3.3     3.5    +      -       -      +
      2B  HIS*     1.3   108.1    +      +       -      +
      4B  PRO*     1.3    65.5    -      -       +      +
      5B  PRO*     3.4     9.4    -      -       +      -
      6B  SER*     2.8    35.0    +      -       -      +
      7B  TYR*     3.7     2.3    +      -       -      +
    381B   ZN      3.0    21.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with PRO 4 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    271A  ARG*     5.9     0.2    -      -       -      +
    350A  GLU*     3.4    30.5    -      -       +      +
      3B  HIS*     1.3    90.7    -      -       +      +
      5B  PRO*     1.4    69.7    -      -       +      +
      7B  TYR*     3.2    17.4    +      -       +      +
      8B  VAL*     3.3    14.1    +      -       -      +
     74B  ALA*     4.4     9.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with PRO 5 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    269A  LEU*     5.9     3.8    -      -       +      -
    271A  ARG*     6.3     0.4    -      -       -      +
      3B  HIS*     3.4    10.8    -      -       +      -
      4B  PRO*     1.4    99.2    -      -       +      +
      6B  SER*     1.3    51.0    +      -       -      +
      8B  VAL*     3.2    11.5    -      -       +      +
      9B  ALA*     2.7    36.6    +      -       -      +
     74B  ALA*     4.2    12.5    -      -       +      +
     77B  HIS*     4.0    27.1    -      -       +      +
     78B  LEU*     4.1    20.2    -      -       +      +
     81B  GLU*     5.0     8.3    -      -       -      +
    367B  THR*     5.1     7.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 6 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    212A  GLU*     4.4     2.4    +      -       -      -
      1B  VAL*     3.4    46.5    +      -       -      +
      3B  HIS*     2.8    18.4    +      -       -      +
      5B  PRO*     1.3    76.6    -      -       -      +
      7B  TYR*     1.3    57.5    +      -       -      -
      9B  ALA*     3.3     8.0    +      -       -      +
     10B  HIS*     2.9    27.5    +      -       -      +
    366B  PRO      4.3     0.2    +      -       -      -
    367B  THR*     3.9    18.2    -      -       -      +
    381B   ZN      4.2     2.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 7 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3B  HIS      3.7     3.0    +      -       -      +
      4B  PRO*     3.2    12.7    +      -       +      +
      6B  SER*     1.3    76.8    -      -       -      +
      8B  VAL*     1.3    61.9    +      -       +      +
     10B  HIS*     3.2    13.0    +      -       +      +
     11B  LEU*     3.0    61.0    +      -       +      +
     63B  GLY      5.3     1.4    +      -       -      -
     71B  MET*     5.8     7.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 8 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4B  PRO      3.3    12.8    +      -       -      +
      5B  PRO*     3.2    20.4    -      -       +      +
      7B  TYR*     1.3    80.1    -      -       +      +
      9B  ALA*     1.3    60.0    +      -       -      +
     11B  LEU*     4.2     8.1    -      -       +      -
     12B  ALA*     2.8    28.9    +      -       +      +
     64B  PHE*     4.9    13.2    -      -       +      -
     71B  MET*     5.0    17.0    -      -       -      +
     74B  ALA*     3.5    30.3    -      -       +      +
     75B  LEU*     3.6    32.3    -      -       +      -
     78B  LEU*     4.8     2.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 9 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      5B  PRO      2.7    23.6    +      -       -      +
      6B  SER*     3.5     6.7    -      -       -      +
      7B  TYR      3.3     0.2    -      -       -      -
      8B  VAL*     1.3    73.3    -      -       -      +
     10B  HIS*     1.3    58.0    +      -       -      +
     12B  ALA*     3.7     1.8    -      -       -      +
     13B  SER*     2.8    36.3    +      -       -      -
     78B  LEU*     3.6    18.8    -      -       +      -
    367B  THR*     3.9    12.6    -      -       -      +
    368B  GLY      5.8     0.7    -      -       -      -
    369B  THR*     3.3    26.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 10 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6B  SER      2.9    13.9    +      -       -      +
      7B  TYR*     3.3    16.0    +      -       +      +
      8B  VAL      3.2     0.2    -      -       -      -
      9B  ALA*     1.3    78.4    -      -       -      +
     11B  LEU*     1.3    70.8    +      -       +      +
     13B  SER*     3.9     2.9    -      -       -      -
     14B  ASP*     2.9    47.8    +      -       +      +
    256B  ALA*     3.9    22.6    -      -       +      +
    257B  GLN*     4.4    24.6    +      -       +      +
    260B  SER*     5.9     1.6    -      -       -      -
    367B  THR      5.1     0.8    +      -       -      +
    368B  GLY      6.0     1.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 11 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7B  TYR*     3.0    57.1    +      -       +      +
      8B  VAL*     3.2    11.6    +      -       +      +
     10B  HIS*     1.3    92.3    -      -       +      +
     12B  ALA*     1.3    63.5    +      -       -      +
     14B  ASP*     3.7     4.7    -      -       +      +
     15B  PHE*     3.1    23.9    +      -       -      +
     18B  ARG*     4.8     0.7    +      -       -      -
     62B  MET      4.1    12.4    -      -       -      +
     63B  GLY*     4.1    17.9    -      -       -      +
     64B  PHE*     4.0    28.9    -      -       +      -
     71B  MET*     5.5     2.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 12 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8B  VAL      2.8    20.5    +      -       -      +
      9B  ALA*     3.9     4.9    -      -       -      +
     11B  LEU*     1.3    74.7    -      -       -      +
     13B  SER*     1.3    61.4    +      -       -      +
     15B  PHE*     3.5     1.8    +      -       -      +
     16B  GLY      3.1    17.0    +      -       -      -
     36B  PRO      3.8     3.0    -      -       -      +
     37B  TYR*     4.9    15.0    -      -       +      -
     40B  ALA*     3.3    32.0    -      -       +      +
     64B  PHE*     4.6    10.0    -      -       +      -
     75B  LEU*     5.0    13.2    -      -       +      -
     78B  LEU*     5.1     0.4    -      -       +      -
    369B  THR*     6.5     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 13 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9B  ALA      2.8    23.9    +      -       -      -
     10B  HIS*     3.9     3.8    -      -       -      -
     12B  ALA*     1.3    70.5    -      -       -      +
     14B  ASP*     1.3    60.7    +      -       -      +
     16B  GLY*     3.3     0.7    +      -       -      -
     17B  VAL*     2.8    36.6    +      -       -      +
     36B  PRO*     4.0     6.2    -      -       -      +
     37B  TYR*     5.4     1.4    -      -       -      +
    256B  ALA*     4.1     8.1    -      -       -      -
    368B  GLY      4.7     2.7    -      -       -      -
    369B  THR*     3.5    10.9    -      -       -      +
    370B  VAL*     2.9    46.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 14 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10B  HIS*     2.9    33.9    +      -       +      +
     11B  LEU*     3.7     7.6    -      -       +      +
     13B  SER*     1.3    78.3    -      -       -      +
     15B  PHE*     1.3    62.2    +      -       -      +
     17B  VAL*     3.6     2.0    +      -       -      +
     18B  ARG*     3.2    51.7    +      -       -      +
    255B  SER*     4.3    10.0    -      -       -      -
    256B  ALA*     3.9    26.0    +      -       +      +
    257B  GLN      5.3     0.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 15 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11B  LEU      3.1    17.2    +      -       -      +
     12B  ALA*     3.7     4.3    -      -       -      +
     14B  ASP*     1.3    76.8    -      -       -      +
     16B  GLY*     1.3    60.7    +      -       -      +
     18B  ARG*     3.1    23.9    +      -       -      +
     19B  VAL*     3.0    46.7    +      -       +      +
     39B  VAL*     4.2     1.3    -      -       +      -
     40B  ALA*     3.7    30.1    -      -       +      -
     43B  LEU*     3.2    36.8    -      -       +      -
     61B  ALA*     3.3    25.6    -      -       +      -
     62B  MET*     3.9    26.7    -      -       +      +
    293B  LEU*     4.3     3.8    -      -       +      -
    295B  MET*     3.8    22.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 16 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12B  ALA      3.1     8.1    +      -       -      -
     15B  PHE*     1.3    76.0    -      -       -      +
     17B  VAL*     1.3    60.5    +      -       -      +
     19B  VAL*     3.1     4.3    +      -       -      +
     20B  PHE*     2.8    24.4    +      -       -      +
     34B  PHE*     3.6     7.6    -      -       -      -
     36B  PRO*     3.4    34.8    -      -       -      -
     39B  VAL*     3.6    12.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 17 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     13B  SER      2.8    26.4    +      -       -      +
     14B  ASP      4.0     4.5    -      -       -      +
     16B  GLY*     1.3    72.9    -      -       -      +
     18B  ARG*     1.3    57.7    +      -       +      +
     20B  PHE*     3.1     8.3    +      -       -      +
     21B  GLN*     2.9    31.9    +      -       +      +
     36B  PRO*     4.2     6.1    -      -       +      -
    254B  LEU*     4.0    17.5    -      -       +      +
    255B  SER*     3.9    29.8    -      -       -      +
    256B  ALA      4.3    11.2    -      -       -      +
    259B  ILE*     5.6     0.2    -      -       +      -
    370B  VAL*     4.4     7.9    -      -       +      -
    373B  MET*     3.4    33.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 18 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11B  LEU      4.8     1.0    +      -       -      -
     14B  ASP*     3.2    34.6    +      -       -      +
     15B  PHE*     3.1    36.5    +      -       -      +
     17B  VAL*     1.3    80.4    -      -       +      +
     19B  VAL*     1.3    63.2    +      -       -      +
     21B  GLN*     3.3    19.1    +      -       -      +
     22B  GLN*     3.3    24.9    +      -       -      +
     60B  ALA      5.4     0.4    +      -       -      -
     61B  ALA*     2.8    34.3    +      -       -      +
     62B  MET      4.6     6.1    +      -       -      -
     63B  GLY*     5.8     0.4    -      -       -      -
    293B  LEU*     4.1    22.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 19 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15B  PHE*     3.0    42.6    +      -       +      +
     16B  GLY      3.1     6.5    +      -       -      +
     18B  ARG*     1.3    74.6    -      -       -      +
     20B  PHE*     1.3    64.3    +      -       -      +
     22B  GLN*     3.1     7.8    +      -       -      +
     23B  VAL*     3.1    19.1    +      -       +      +
     34B  PHE*     3.5    26.2    -      -       +      -
     39B  VAL*     4.2     8.3    -      -       +      -
    286B  LEU*     4.3    10.5    -      -       +      -
    289B  PRO*     4.0    18.4    -      -       +      -
    290B  LEU*     4.3     9.6    -      -       +      -
    293B  LEU*     3.6    21.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 20 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16B  GLY      2.8    16.5    +      -       -      +
     17B  VAL*     3.1     9.2    +      -       -      +
     19B  VAL*     1.3    74.6    -      -       -      +
     21B  GLN*     1.3    62.2    +      -       +      +
     23B  VAL*     2.9     6.8    +      -       +      +
     24B  ALA*     2.8    48.1    +      -       +      -
     32B  VAL*     4.1    20.9    -      -       +      -
     34B  PHE*     3.7    33.4    -      +       +      -
    251B  THR*     4.2    11.2    -      -       +      -
    254B  LEU*     4.4    11.7    -      -       +      -
    359B  LEU*     4.4     6.5    -      -       +      -
    373B  MET*     3.6    31.9    -      -       +      -
    374B  GLY*     4.0    35.7    -      -       -      -
    375B  GLN*     4.4     5.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 21 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17B  VAL*     2.9    20.1    +      -       +      +
     18B  ARG*     3.6    23.0    -      -       -      +
     19B  VAL      3.3     0.2    -      -       -      -
     20B  PHE*     1.3    81.2    -      -       +      +
     22B  GLN*     1.3    60.0    +      -       -      +
     24B  ALA*     3.9     3.9    -      -       -      +
     25B  GLN*     2.9    49.7    +      -       -      +
    251B  THR*     2.9    33.8    +      -       +      +
    252B  ASN*     3.0    24.9    +      -       -      +
    254B  LEU*     3.5    28.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 22 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18B  ARG      3.6    12.9    +      -       -      +
     19B  VAL      3.1     9.0    +      -       -      +
     21B  GLN*     1.3    79.5    -      -       -      +
     23B  VAL*     1.3    62.7    +      -       -      +
     25B  GLN*     3.7    24.4    +      -       -      +
     26B  ALA*     3.5    19.1    +      -       -      +
    289B  PRO*     3.7    36.2    -      -       +      +
    292B  ASN*     3.2    34.3    +      -       -      +
    293B  LEU*     3.9    19.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 23 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19B  VAL*     3.1    15.9    +      -       +      +
     20B  PHE*     2.9    11.0    +      -       +      +
     22B  GLN*     1.3    75.4    -      -       -      +
     24B  ALA*     1.3    64.6    +      -       -      +
     26B  ALA*     3.2     5.3    +      -       -      +
     27B  SER*     3.1    27.5    +      -       -      +
     32B  VAL*     3.9    30.7    -      -       +      -
     34B  PHE*     4.3    10.8    -      -       +      -
    284B  VAL*     3.7    36.3    -      -       +      -
    289B  PRO*     3.7    18.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 24 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20B  PHE*     2.8    32.0    +      -       +      +
     21B  GLN      4.0     1.6    -      -       -      +
     23B  VAL*     1.3    74.4    -      -       -      +
     25B  GLN*     1.3    62.3    +      -       -      +
     27B  SER*     3.4     1.9    -      -       -      +
     28B  LYS*     3.2    27.2    +      -       -      +
     32B  VAL*     5.2     1.3    -      -       -      -
    251B  THR*     3.7    25.6    -      -       +      -
    375B  GLN*     3.6    27.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 25 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21B  GLN*     2.9    41.9    +      -       +      +
     22B  GLN*     4.0    25.9    +      -       -      +
     23B  VAL      3.2     0.2    -      -       -      -
     24B  ALA*     1.3    79.1    -      -       +      +
     26B  ALA*     1.3    60.1    +      -       -      +
     28B  LYS*     4.0    17.7    -      -       -      +
    251B  THR*     5.5     2.7    -      -       +      -
    252B  ASN*     3.4    30.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 26 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22B  GLN      3.5    13.3    +      -       -      +
     23B  VAL*     3.2     4.8    +      -       -      +
     24B  ALA      3.2     0.2    -      -       -      -
     25B  GLN*     1.3    79.0    -      -       -      +
     27B  SER*     1.3    62.5    +      -       -      +
     28B  LYS*     3.3     4.4    +      -       -      -
     30B  ARG*     3.0    14.4    +      -       -      -
    288B  LYS*     6.5     0.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 27 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23B  VAL*     3.1    20.7    +      -       -      +
     24B  ALA      3.4     3.1    -      -       -      -
     26B  ALA*     1.3    79.6    -      -       -      +
     28B  LYS*     1.3    63.3    +      -       -      +
     29B  ASP      3.1     4.6    +      -       -      -
     30B  ARG*     3.1    31.8    +      -       -      +
     32B  VAL*     4.1    17.8    -      -       -      +
    375B  GLN*     3.1    16.1    +      -       -      -
----------------------------------------------------------
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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