Contacts of the helix formed by residues 148 - 173 (chain N) in PDB entry 6MZL


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 ASP 148 (chain N).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90C  LEU*     5.9     2.4    -      -       -      +
    934D  TYR*     4.7     3.3    -      -       -      +
    935D  GLU*     5.8     0.7    -      -       -      +
    146N  ALA*     3.2    22.3    -      -       +      +
    147N  SER*     1.3    78.5    +      -       -      +
    149N  PRO*     1.3    72.0    -      -       -      +
    150N  ARG*     2.6    58.9    +      -       -      +
    151N  ILE*     3.9    18.0    +      -       +      +
    152N  ILE*     4.3     1.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 149 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132N  ASP*     5.3     8.7    -      -       +      +
    146N  ALA      5.2     1.1    -      -       -      +
    147N  SER      3.4     9.8    -      -       -      +
    148N  ASP*     1.3    90.2    -      -       -      +
    150N  ARG*     1.3    57.5    +      -       +      -
    151N  ILE      3.3     0.7    -      -       -      -
    152N  ILE*     3.2    17.3    +      -       +      +
    153N  ARG*     2.9    58.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 150 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90C  LEU*     5.1     7.1    -      -       +      +
    934D  TYR*     3.4    44.2    +      -       -      +
    120N  LEU      4.4    11.0    +      -       -      -
    121N  MET*     4.6     9.3    +      -       -      +
    123N  LEU*     3.5    35.1    -      -       +      +
    124N  GLU*     3.5    33.0    +      -       -      +
    148N  ASP*     2.6    40.5    +      -       -      +
    149N  PRO*     1.3    74.2    -      -       -      +
    151N  ILE*     1.3    62.4    +      -       +      +
    153N  ARG*     3.3    25.4    +      -       -      +
    154N  LEU*     2.9    27.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 151 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88C  PRO*     3.7    26.9    -      -       +      +
     89C  ILE*     4.9     4.7    -      -       -      -
     90C  LEU*     3.7    25.8    -      -       +      +
     93C  VAL*     3.8    24.0    -      -       +      -
    144N  PHE*     3.6    32.8    -      -       +      -
    146N  ALA*     4.5     9.6    -      -       +      -
    148N  ASP*     3.9    17.7    +      -       +      +
    149N  PRO      3.3     0.6    -      -       -      -
    150N  ARG*     1.3    73.9    -      -       +      +
    152N  ILE*     1.3    60.8    +      -       -      +
    154N  LEU*     3.2     6.4    +      -       +      +
    155N  ILE*     2.9    44.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 152 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132N  ASP*     3.7    37.5    -      -       +      +
    135N  THR*     3.8    17.7    -      -       +      -
    136N  GLY*     4.6    10.3    -      -       -      +
    139N  LEU*     3.7    26.5    -      -       +      -
    144N  PHE*     4.0    18.2    -      -       +      +
    146N  ALA*     4.5    10.5    -      -       +      +
    148N  ASP      4.3     5.2    -      -       -      +
    149N  PRO*     3.2    21.7    +      -       +      +
    151N  ILE*     1.3    73.2    -      -       -      +
    153N  ARG*     1.3    58.6    +      -       -      +
    155N  ILE*     3.9     3.8    -      -       -      +
    156N  SER*     2.9    35.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 153 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123N  LEU*     3.4    24.8    +      -       +      -
    124N  GLU*     4.5    10.8    +      -       -      +
    126N  TYR*     2.7    37.4    +      -       +      -
    127N  THR*     5.6     1.8    -      -       -      +
    128N  PRO*     3.6    31.1    -      -       +      +
    132N  ASP*     4.7     4.4    +      -       -      +
    149N  PRO*     2.9    39.8    +      -       -      +
    150N  ARG*     3.3    44.3    -      -       -      +
    152N  ILE*     1.3    76.9    -      -       -      +
    154N  LEU*     1.3    56.8    +      -       -      +
    156N  SER*     3.8     0.3    -      -       -      -
    157N  LEU*     3.0    44.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 154 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90C  LEU*     4.8    16.6    -      -       +      +
     93C  VAL*     4.2    26.5    -      -       +      -
     94C  GLY*     5.2     5.6    -      -       -      +
     97C  PHE*     4.3    13.2    -      -       +      -
    104C  LEU*     5.9     1.3    -      -       +      -
    107C  LEU*     3.8    21.3    -      -       +      -
    119N  PHE*     3.8    34.3    -      -       +      -
    120N  LEU*     5.0     6.7    -      -       +      -
    123N  LEU*     4.7    10.3    -      -       +      +
    150N  ARG      2.9    13.8    +      -       -      +
    151N  ILE*     3.6     8.7    -      -       -      +
    153N  ARG*     1.3    76.7    -      -       -      +
    155N  ILE*     1.3    58.0    +      -       -      +
    157N  LEU*     3.9     4.6    -      -       +      +
    158N  ALA*     2.9    31.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 155 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69C  LEU*     3.7    23.5    -      -       +      +
     72C  LEU*     3.9    20.9    -      -       +      +
     73C  GLY*     6.6     0.2    -      -       -      -
     76C  CYS*     5.6     4.7    -      -       -      -
     93C  VAL*     4.4    11.0    -      -       +      -
     97C  PHE*     4.2    22.8    -      -       +      -
    135N  THR*     4.8     3.4    -      -       +      -
    139N  LEU*     3.9    33.4    -      -       +      -
    144N  PHE*     4.4     8.7    -      -       +      -
    151N  ILE*     2.9    34.3    +      -       +      +
    152N  ILE*     4.1     3.8    -      -       -      +
    154N  LEU*     1.3    75.8    -      -       +      +
    156N  SER*     1.3    58.5    +      -       -      +
    158N  ALA*     3.4     1.6    +      -       -      +
    159N  ALA*     2.9    28.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 156 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69C  LEU*     5.7     0.9    -      -       -      -
    128N  PRO*     4.8     7.6    -      -       -      -
    130N  ILE*     3.7    23.8    -      -       -      +
    132N  ASP*     4.1     8.4    +      -       -      -
    135N  THR*     3.1    28.7    +      -       -      +
    152N  ILE      2.9    22.6    +      -       -      -
    153N  ARG*     3.8     5.2    -      -       -      -
    155N  ILE*     1.3    76.4    -      -       -      +
    157N  LEU*     1.3    58.4    +      -       -      +
    159N  ALA*     3.3     6.3    +      -       -      +
    160N  GLN*     2.9    33.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 157 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107C  LEU*     4.8     6.5    -      -       +      -
    110C  TYR*     3.5    13.9    -      -       +      -
    111C  ILE*     3.7    35.2    -      -       +      -
    114C  ILE*     5.0     3.4    -      -       +      -
    115C  GLU*     3.4    36.1    -      -       +      +
    119N  PHE*     6.2     0.2    -      -       +      -
    123N  LEU*     6.2     1.6    -      -       +      -
    126N  TYR*     5.1     4.3    -      -       +      -
    128N  PRO*     4.8    10.8    -      -       +      -
    129N  THR      4.9     0.4    -      -       -      +
    153N  ARG*     3.0    30.4    +      -       +      +
    154N  LEU*     4.2     4.0    -      -       +      +
    156N  SER*     1.3    76.0    -      -       -      +
    158N  ALA*     1.3    57.4    +      -       -      +
    160N  GLN*     3.3    32.5    +      -       -      +
    161N  LYS*     2.9    23.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 158 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68C  TYR*     5.1     2.8    +      -       -      -
     97C  PHE*     3.6    35.7    -      -       +      -
    102C  VAL*     5.5     5.6    -      -       +      -
    107C  LEU*     4.3    20.6    -      -       +      +
    154N  LEU*     2.9    20.1    +      -       +      +
    155N  ILE      3.8     1.3    -      -       -      +
    157N  LEU*     1.3    76.3    -      -       -      +
    159N  ALA*     1.3    59.3    +      -       -      +
    161N  LYS*     3.2     4.1    +      -       -      +
    162N  PHE*     2.9    26.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 159 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65C  LEU*     4.0    17.0    -      -       +      +
     68C  TYR*     4.8     8.4    -      -       +      -
     69C  LEU*     4.0    21.8    -      -       +      -
    130N  ILE*     5.0     7.0    -      -       +      -
    155N  ILE      2.9    17.6    +      -       -      +
    156N  SER*     3.6     6.3    -      -       -      +
    158N  ALA*     1.3    73.4    -      -       -      +
    160N  GLN*     1.3    60.9    +      -       -      +
    162N  PHE*     3.3    10.0    +      -       -      +
    163N  ILE*     3.0    32.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 160 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40C  SER*     5.9     0.4    -      -       -      -
     44C  ILE*     3.8    25.9    -      -       +      +
    110C  TYR*     2.8    21.8    +      -       +      +
    114C  ILE*     3.4    21.6    -      -       -      +
    129N  THR*     3.4    29.0    -      -       -      +
    130N  ILE*     3.4    34.9    -      -       +      +
    156N  SER*     2.9    15.7    +      -       -      +
    157N  LEU*     3.3    32.9    -      -       -      +
    159N  ALA*     1.3    77.4    -      -       -      +
    161N  LYS*     1.3    56.5    +      -       -      +
    163N  ILE*     3.4     3.5    +      -       -      +
    164N  SER*     2.8    21.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 161 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    102C  VAL*     5.8     4.9    -      -       +      +
    103C  SER*     4.8     9.6    +      -       -      +
    106C  GLU*     3.1    43.0    +      -       -      +
    107C  LEU*     4.1    17.0    -      -       +      +
    110C  TYR*     3.4    43.5    -      -       +      -
    157N  LEU      2.9    16.8    +      -       -      +
    158N  ALA*     3.2     8.4    +      -       -      +
    160N  GLN*     1.3    73.1    -      -       -      +
    162N  PHE*     1.3    60.4    +      -       -      +
    164N  SER*     3.6     1.2    -      -       -      -
    165N  ASP*     2.9    53.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 162 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64C  VAL*     4.0    24.2    -      -       +      -
     65C  LEU*     4.3    14.4    -      -       +      -
     68C  TYR*     4.2    49.6    -      +       +      +
    158N  ALA      2.9    13.9    +      -       -      +
    159N  ALA*     3.4    10.5    -      -       -      +
    161N  LYS*     1.3    75.9    -      -       -      +
    163N  ILE*     1.3    65.5    +      -       +      +
    165N  ASP*     3.4     6.5    +      -       +      +
    166N  ILE*     3.0    56.1    +      -       +      +
    206N  GLU*     4.7    25.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 163 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41C  VAL*     4.7    19.3    -      -       +      +
     44C  ILE*     3.8    34.1    -      -       +      -
     45C  CYS*     5.8     2.0    -      -       -      -
     61C  LEU*     4.6    23.3    -      -       +      +
     64C  VAL*     6.2     0.4    -      -       +      -
     65C  LEU*     3.6    39.0    -      -       +      -
    159N  ALA      3.0    20.0    +      -       -      +
    160N  GLN      3.7     4.0    -      -       -      +
    162N  PHE*     1.3    81.9    -      -       +      +
    164N  SER*     1.3    56.5    +      -       -      +
    166N  ILE*     3.9    10.1    -      -       +      +
    167N  ALA*     2.9    33.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 164 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44C  ILE*     3.5    12.6    -      -       -      +
     48C  LEU*     4.2    13.7    -      -       -      +
    110C  TYR*     2.3    41.3    +      -       -      -
    114C  ILE*     4.8     1.9    -      -       -      +
    160N  GLN      2.8    13.2    +      -       -      -
    161N  LYS*     3.6     4.9    -      -       -      -
    162N  PHE      3.2     0.2    -      -       -      -
    163N  ILE*     1.3    77.0    -      -       -      +
    165N  ASP*     1.3    55.2    +      -       -      +
    167N  ALA*     4.1     0.3    -      -       -      +
    168N  ASN*     2.7    47.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 165 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    161N  LYS*     2.9    46.3    +      -       -      +
    162N  PHE*     3.9     5.7    -      -       +      +
    164N  SER*     1.3    75.9    -      -       -      +
    166N  ILE*     1.3    60.3    +      -       +      +
    168N  ASN*     3.4    11.4    +      -       -      +
    169N  ASP*     3.0    28.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 166 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61C  LEU*     4.3    31.0    -      -       +      -
     64C  VAL*     5.2     2.7    -      -       +      -
    162N  PHE*     3.0    57.0    +      -       +      +
    163N  ILE*     3.9     9.6    -      -       +      +
    165N  ASP*     1.3    77.3    -      -       +      +
    167N  ALA*     1.3    59.0    +      -       +      +
    169N  ASP*     3.2     8.7    +      -       -      +
    170N  ALA*     2.9    25.8    +      -       +      +
    203N  ALA*     3.7    36.3    -      -       +      +
    206N  GLU*     6.2     2.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 167 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45C  CYS*     5.3     6.7    -      -       -      -
     48C  LEU*     3.7    22.2    -      -       +      -
     50C  TRP*     3.4    19.5    +      -       +      +
    163N  ILE*     2.9    23.3    +      -       +      +
    166N  ILE*     1.3    78.7    -      -       +      +
    168N  ASN*     1.3    58.0    +      -       -      +
    170N  ALA*     3.4     7.6    +      -       -      -
    171N  LEU*     2.8    28.6    +      -       -      +
    195N  LEU*     6.2     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 168 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48C  LEU*     3.5    24.4    -      -       -      +
    164N  SER*     2.7    36.9    +      -       -      +
    165N  ASP*     3.7    13.2    +      -       -      +
    166N  ILE      3.2     0.2    -      -       -      -
    167N  ALA*     1.3    74.8    -      -       -      +
    169N  ASP*     1.3    60.5    +      -       -      +
    171N  LEU*     3.7    13.2    -      -       -      +
    172N  GLN*     2.9    41.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 169 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165N  ASP      3.0    14.2    +      -       -      +
    166N  ILE*     3.2    10.3    +      -       -      +
    168N  ASN*     1.3    75.5    -      -       -      +
    170N  ALA*     1.3    58.1    +      -       -      +
    172N  GLN*     3.4    10.2    +      -       -      +
    173N  HIS*     2.9    56.5    +      -       -      +
    202N  PRO*     3.4    36.5    -      -       +      +
    203N  ALA*     4.8     2.8    -      -       +      +
    205N  SER*     5.2     0.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 170 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50C  TRP*     3.6     8.7    -      -       +      -
    166N  ILE*     2.9    16.0    +      -       +      +
    167N  ALA*     3.5    11.9    -      -       -      +
    168N  ASN      3.2     0.2    -      -       -      -
    169N  ASP*     1.3    75.8    -      -       -      +
    171N  LEU*     1.3    57.5    +      -       -      +
    174N  CYS*     2.8    28.1    +      -       -      +
    195N  LEU*     3.7    29.2    -      -       +      -
    199N  ASP*     3.2    27.3    +      -       +      +
    203N  ALA*     6.0     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 171 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48C  LEU*     4.6    23.6    -      -       +      +
     49C  GLY      6.0     2.0    -      -       -      +
     50C  TRP*     3.6    19.3    -      -       +      -
    167N  ALA      2.8    16.8    +      -       -      +
    168N  ASN*     3.3    19.3    +      -       -      +
    169N  ASP      3.2     0.2    -      -       -      -
    170N  ALA*     1.3    76.4    -      -       -      +
    172N  GLN*     1.3    64.9    +      -       +      +
    174N  CYS*     3.1    13.8    +      -       +      +
    175N  LYS*     3.5    18.9    +      -       -      +
    193N  TYR*     3.9    37.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 172 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    168N  ASN*     2.9    24.9    +      -       -      +
    169N  ASP*     3.9    10.8    -      -       -      +
    171N  LEU*     1.3    78.4    -      -       +      +
    173N  HIS*     1.3    64.9    +      -       +      +
    174N  CYS      3.6     0.5    +      -       -      -
    175N  LYS*     3.9    20.5    +      -       -      +
    176N  MET*     4.6     7.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 173 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169N  ASP*     2.9    42.3    +      -       -      +
    172N  GLN*     1.3    78.5    -      -       +      +
    174N  CYS*     1.3    58.3    +      -       -      +
    175N  LYS      3.3     1.3    -      -       -      -
    176N  MET*     3.1    45.0    +      -       +      +
    198N  GLU*     4.9     9.7    -      -       +      +
    199N  ASP*     3.2    18.6    -      -       -      +
    202N  PRO*     3.5    31.4    -      -       +      +
     75S  ILE*     6.0     3.8    -      -       -      +
----------------------------------------------------------
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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