Contacts of the helix formed by residues 7 - 36 (chain A) in PDB entry 3M0V


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 ALA 7 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4A  PHE*     4.6     4.2    +      -       -      -
      5A  ARG      4.1     2.0    +      -       -      -
      6A  ILE*     1.3    74.6    -      -       -      +
      8A  GLN*     1.3    66.0    +      -       -      +
      9A  ASP*     3.9    24.0    -      -       -      +
     10A  VAL*     3.0    25.2    +      -       +      +
     11A  VAL*     3.3    10.0    +      -       -      +
    409A  SER*     5.4     1.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 8 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4A  PHE*     2.9    57.3    -      -       +      +
      6A  ILE      3.3     1.8    +      -       -      +
      7A  ALA*     1.3    72.0    -      -       -      +
      9A  ASP*     1.3    57.8    +      -       -      +
     11A  VAL*     3.2     9.0    +      -       -      +
     12A  ALA*     2.8    30.9    +      -       -      +
     90A  GLN*     5.0     2.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 9 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7A  ALA*     3.9    13.4    -      -       -      +
      8A  GLN*     1.3    77.8    -      -       -      +
     10A  VAL*     1.3    85.7    +      -       -      +
     12A  ALA*     3.8     6.8    -      -       -      +
     13A  ARG*     2.9    48.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 10 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6A  ILE*     4.6     3.1    -      -       +      -
      7A  ALA*     3.0    20.8    +      -       +      +
      9A  ASP*     1.3    93.2    +      -       -      +
     11A  VAL*     1.3    60.3    +      -       -      +
     13A  ARG*     3.3    15.4    +      -       -      +
     14A  GLU*     2.9    31.9    +      -       +      +
    405A  THR*     4.0    25.4    -      -       +      +
    408A  ALA*     4.3    13.0    -      -       +      +
    409A  SER*     4.1    24.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 11 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6A  ILE*     3.9    19.1    -      -       +      -
      7A  ALA      3.7    11.9    -      -       -      +
      8A  GLN*     3.2     9.3    +      -       -      +
     10A  VAL*     1.3    76.4    -      -       -      +
     12A  ALA*     1.3    63.8    +      -       -      +
     14A  GLU*     3.9     0.3    -      -       -      -
     15A  ASN*     3.0    36.2    +      -       -      +
     90A  GLN*     4.0    16.4    -      -       +      +
     91A  LEU*     4.1     7.2    -      -       +      -
    397A  GLY      4.4     8.7    -      -       -      +
    398A  GLY      3.7    28.3    -      -       -      +
    399A  ALA*     4.4     5.8    -      -       +      +
    405A  THR*     3.9    14.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 12 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8A  GLN      2.8    16.8    +      -       -      +
      9A  ASP*     3.8     8.7    -      -       -      +
     11A  VAL*     1.3    79.3    -      -       -      +
     13A  ARG*     1.3    56.8    +      -       -      +
     15A  ASN*     3.3     4.4    +      -       -      +
     16A  ASP*     2.9    42.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 13 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9A  ASP*     2.9    41.7    +      -       -      +
     10A  VAL*     3.7    20.3    -      -       -      +
     12A  ALA*     1.3    75.7    -      -       -      +
     14A  GLU*     1.3    62.3    +      -       -      +
     16A  ASP*     3.3     9.0    +      -       -      +
     17A  ARG*     3.0    51.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 14 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10A  VAL*     2.9    21.4    +      -       +      +
     11A  VAL      4.2     1.3    -      -       -      +
     13A  ARG*     1.3    83.8    +      -       -      +
     15A  ASN*     1.3    66.0    -      -       -      +
     17A  ARG*     3.1    32.7    +      -       -      -
     18A  ARG*     2.8    64.0    +      -       -      +
    401A  ASP      6.3     0.2    -      -       -      -
    404A  ALA      5.2     0.2    -      -       -      +
    405A  THR*     3.4    29.6    -      -       +      +
    408A  ALA*     3.9    30.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 15 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11A  VAL*     3.0    26.7    +      -       -      +
     12A  ALA*     3.7     5.2    -      -       -      +
     14A  GLU*     1.3    75.0    -      -       -      +
     16A  ASP*     1.3    65.1    +      -       -      +
     18A  ARG*     3.0     4.3    +      -       -      +
     19A  ALA*     2.8    29.8    +      -       -      +
    394A  ARG*     4.7    12.5    -      -       +      +
    398A  GLY      3.1    19.3    -      -       -      +
    399A  ALA*     3.4     9.3    -      -       -      +
    400A  VAL*     2.8    47.1    -      -       +      +
    401A  ASP      4.7     0.8    -      -       -      +
    405A  THR*     4.8     1.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 16 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12A  ALA*     2.9    33.2    +      -       -      +
     13A  ARG*     3.7     6.8    -      -       -      +
     15A  ASN*     1.3    80.3    -      -       -      +
     17A  ARG*     1.3    61.6    +      -       -      +
     18A  ARG      3.1     1.2    +      -       -      -
     19A  ALA*     3.3    19.9    +      -       -      +
     20A  SER      4.7     1.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 17 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     13A  ARG*     3.0    34.7    +      -       -      +
     14A  GLU*     3.1    40.0    +      -       -      +
     15A  ASN      3.2     0.2    -      -       -      -
     16A  ASP*     1.3    77.0    -      -       -      +
     18A  ARG*     1.3    72.8    +      -       +      +
     19A  ALA      3.7     0.2    -      -       -      -
     20A  SER*     5.4     2.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 18 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14A  GLU*     2.8    64.0    +      -       -      +
     15A  ASN      3.0     4.6    +      -       -      +
     17A  ARG*     1.3    95.9    -      -       +      +
     19A  ALA*     1.3    62.6    +      -       -      +
     20A  SER      3.4     2.2    +      -       -      -
     21A  ALA*     3.5    11.4    +      -       +      +
     22A  LEU*     3.1    22.8    +      -       -      +
    400A  VAL*     4.0    20.1    -      -       +      +
    401A  ASP*     3.5    32.4    +      -       -      +
    404A  ALA*     3.3    28.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 19 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15A  ASN      2.8    14.2    +      -       -      +
     16A  ASP*     3.3    16.8    +      -       -      +
     18A  ARG*     1.3    74.1    -      -       -      +
     20A  SER*     1.3    66.3    +      -       -      +
     22A  LEU*     3.3     8.6    +      -       -      +
     23A  LYS*     2.9    25.5    +      -       -      +
    394A  ARG*     6.1     4.9    -      -       -      +
    400A  VAL*     5.7     0.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 20 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16A  ASP      4.7     2.0    +      -       -      -
     17A  ARG      5.4     1.7    +      -       -      -
     18A  ARG      3.4     0.4    -      -       -      -
     19A  ALA*     1.3    78.9    -      -       -      +
     21A  ALA*     1.3    65.3    +      -       -      +
     23A  LYS*     3.3     9.4    +      -       -      +
     24A  GLU*     3.1    30.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 21 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18A  ARG*     3.5    11.9    +      -       +      +
     19A  ALA      3.4     0.2    -      -       -      -
     20A  SER*     1.3    78.2    -      -       -      +
     22A  LEU*     1.3    63.9    +      -       -      +
     24A  GLU*     3.3     2.9    +      -       -      +
     25A  ASP*     2.9    35.5    +      -       -      +
     35D  ARG*     4.4    26.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 22 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18A  ARG      3.1    18.1    +      -       -      +
     19A  ALA*     3.7     7.6    -      -       -      +
     21A  ALA*     1.3    73.4    -      -       -      +
     23A  LYS*     1.3    58.6    +      -       -      +
     25A  ASP*     4.6     4.5    -      -       +      -
     26A  TYR*     2.7    43.6    +      -       +      +
    387A  PRO*     3.6    34.3    -      -       +      +
    390A  ALA*     3.8    13.2    -      -       +      +
    391A  GLU*     4.1    28.3    -      -       +      +
    394A  ARG*     4.5     9.0    -      -       -      -
    400A  VAL*     3.9    33.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 23 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19A  ALA      2.9    17.4    +      -       -      +
     20A  SER*     3.4     9.6    -      -       -      +
     22A  LEU*     1.3    78.1    -      -       -      +
     24A  GLU*     1.3    71.0    +      -       -      +
     26A  TYR*     4.0     3.7    -      -       -      +
     27A  GLU*     2.8    68.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 24 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20A  SER*     3.1    19.9    +      -       -      +
     21A  ALA*     3.6     7.0    -      -       -      +
     23A  LYS*     1.3    95.0    -      -       -      +
     25A  ASP*     1.3    56.5    +      -       -      +
     27A  GLU*     4.0     9.6    -      -       -      +
     28A  ALA*     3.0    29.7    +      -       -      +
     35D  ARG*     3.7    33.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 25 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21A  ALA*     2.9    27.9    +      -       -      +
     22A  LEU*     3.9     5.0    -      -       +      +
     24A  GLU*     1.3    74.1    -      -       -      +
     26A  TYR*     1.3    61.0    +      -       -      +
     28A  ALA*     3.4     5.9    +      -       -      +
     29A  LEU*     2.9    30.0    +      -       -      +
    387A  PRO*     3.8    21.9    -      -       +      +
     32D  ASN*     3.0    25.7    +      -       -      +
     35D  ARG*     3.0    24.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 26 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22A  LEU*     2.7    26.7    +      -       +      +
     23A  LYS*     4.0     3.6    -      -       -      +
     25A  ASP*     1.3    73.7    -      -       -      +
     27A  GLU*     1.3    66.6    +      -       +      +
     29A  LEU*     3.3     3.1    +      -       -      +
     30A  GLY*     2.8    25.5    +      -       -      -
     40A  ILE*     3.5    33.4    -      -       +      +
     41A  GLU*     2.7    33.8    +      -       -      -
     44A  THR*     3.0    23.7    +      -       -      -
    387A  PRO*     3.6    30.2    -      -       +      +
    388A  ILE*     4.1     4.7    -      -       -      -
    391A  GLU*     3.6    30.7    -      -       +      -
    395A  ARG*     3.5     4.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 27 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23A  LYS*     2.8    59.4    +      -       +      +
     24A  GLU*     4.1     9.8    -      -       -      +
     26A  TYR*     1.3    81.5    -      -       +      +
     28A  ALA*     1.3    65.2    +      -       -      +
     30A  GLY*     3.7     1.9    -      -       -      +
     31A  ALA*     3.0    24.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 28 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24A  GLU      3.0    19.7    +      -       -      +
     25A  ASP*     3.6     7.6    -      -       -      +
     27A  GLU*     1.3    77.6    -      -       -      +
     29A  LEU*     1.3    61.7    +      -       -      +
     31A  ALA*     3.3     6.9    +      -       -      +
     32A  ASN*     3.1    22.6    +      -       -      +
     35A  ARG*     4.9     1.9    +      -       -      -
     28D  ALA*     4.0    28.3    -      -       +      +
     35D  ARG*     6.2     0.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 29 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25A  ASP      2.9    19.0    +      -       -      +
     26A  TYR      3.6     3.8    -      -       -      +
     28A  ALA*     1.3    77.1    -      -       -      +
     30A  GLY*     1.3    58.5    +      -       -      +
     32A  ASN*     3.2    10.5    +      -       +      +
     33A  LEU*     2.8    45.7    +      -       +      +
     40A  ILE*     3.9     7.6    -      -       +      -
    383A  THR*     3.7    28.0    -      -       +      -
    384A  ASP      3.6    21.5    -      -       -      +
    385A  VAL*     4.3     1.3    -      -       -      -
    387A  PRO*     4.1    14.4    -      -       +      -
    388A  ILE*     3.7    35.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 30 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26A  TYR      2.8    17.5    +      -       -      -
     27A  GLU*     3.7     3.6    -      -       -      -
     28A  ALA      3.2     0.2    -      -       -      -
     29A  LEU*     1.3    76.7    -      -       -      +
     31A  ALA*     1.3    56.2    +      -       -      +
     33A  LEU*     3.8     2.0    -      -       -      +
     34A  ALA*     2.9    29.5    +      -       -      +
     38A  VAL      4.7     0.9    -      -       -      +
     40A  ILE*     3.8    29.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 31 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27A  GLU      3.0    16.6    +      -       -      +
     28A  ALA*     3.7     5.6    -      -       -      +
     29A  LEU      3.3     0.4    -      -       -      -
     30A  GLY*     1.3    73.6    -      -       -      +
     32A  ASN*     1.3    64.8    +      -       -      +
     34A  ALA*     3.3     7.2    +      -       -      +
     35A  ARG*     3.1    45.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 32 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28A  ALA      3.1    13.8    +      -       -      +
     29A  LEU*     3.2    14.7    +      -       +      +
     31A  ALA*     1.3    77.1    -      -       -      +
     33A  LEU*     1.3    64.1    +      -       -      +
     35A  ARG*     3.3    27.8    +      -       -      +
     36A  ARG*     2.8    49.6    +      -       -      +
    383A  THR*     5.2     0.2    -      -       -      +
     25D  ASP*     3.0    31.3    +      -       -      +
    384D  ASP*     5.9     1.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 33 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29A  LEU*     2.8    42.8    +      -       +      +
     30A  GLY*     3.8     3.6    -      -       -      +
     32A  ASN*     1.3    76.1    -      -       -      +
     34A  ALA*     1.3    59.4    +      -       -      +
     36A  ARG*     2.8    47.7    +      -       -      +
     37A  GLY      3.0     0.2    +      -       -      -
     38A  VAL*     2.8    41.9    +      -       +      +
     40A  ILE*     4.0    26.7    -      -       +      +
    355A  LEU*     4.1    33.9    -      -       +      -
    383A  THR*     4.5     0.2    -      -       +      -
    388A  ILE*     4.3     6.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 34 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30A  GLY      2.9    18.2    +      -       -      +
     31A  ALA*     3.6     8.5    -      -       -      +
     32A  ASN      3.3     0.2    -      -       -      -
     33A  LEU*     1.3    76.3    -      -       -      +
     35A  ARG*     1.3    57.4    +      -       +      +
     37A  GLY*     2.9    19.1    +      -       -      -
     38A  VAL      3.3    11.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 35 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28A  ALA      4.9     1.4    +      -       -      -
     31A  ALA*     3.1    34.3    +      -       -      +
     32A  ASN*     3.5    24.0    -      -       -      +
     33A  LEU      3.2     0.2    -      -       -      -
     34A  ALA*     1.3    77.0    -      -       +      +
     36A  ARG*     1.3    60.1    +      -       +      +
     37A  GLY      3.3     1.4    +      -       -      -
     21D  ALA*     4.1    27.4    -      -       +      +
     24D  GLU*     3.7    33.4    +      -       -      +
     25D  ASP*     2.9    29.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 36 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32A  ASN*     2.8    44.3    +      -       -      +
     33A  LEU*     2.8    26.8    +      -       -      +
     35A  ARG*     1.3    80.0    -      -       +      +
     37A  GLY*     1.3    62.0    +      -       -      +
     38A  VAL*     3.4    12.2    +      -       +      +
    355A  LEU*     4.5    10.9    +      -       -      +
    357A  ASP*     5.3     5.0    -      -       -      +
    379A  ARG*     3.1    23.0    +      -       -      +
    380A  ALA*     4.2     5.5    -      -       -      +
    383A  THR*     2.9    32.9    +      -       -      +
    384D  ASP*     5.4     4.2    +      -       -      -
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  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