Contacts of the helix formed by residues 155 - 177 (chain Y) in PDB entry 5MG3


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 155 (chain Y).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    245D  GLU*     2.8    14.9    +      -       -      +
    148Y  LEU      5.8     0.2    -      -       -      -
    151Y  ASN*     3.2    26.7    -      -       -      +
    152Y  PRO*     4.8     1.6    -      -       +      -
    153Y  GLY*     4.1     4.5    -      -       -      +
    154Y  PHE*     1.4    72.7    -      -       -      +
    156Y  PHE*     1.4    58.9    +      -       -      +
    157Y  TYR      3.5     2.0    -      -       -      -
    158Y  PHE*     3.2    17.9    +      -       +      -
    159Y  THR*     2.8    34.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 156 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    245D  GLU*     4.2    21.3    -      -       -      -
    247D  VAL*     4.3    20.9    -      -       +      -
    301D  ASP*     6.2     0.2    -      -       -      -
    532G  LEU      5.7     0.9    -      -       -      -
    534G  LEU*     3.8    31.0    -      -       +      -
     42Y  PRO*     3.5    12.7    -      -       +      +
     43Y  GLY*     3.5    33.0    -      -       -      -
     44Y  ILE*     4.0    19.7    -      -       +      +
     45Y  ASP*     6.0     0.7    -      -       -      +
    154Y  PHE*     3.4    28.9    +      +       -      -
    155Y  ALA*     1.4    75.8    -      -       -      +
    157Y  TYR*     1.4    62.7    +      -       +      +
    159Y  THR*     3.1    11.4    +      -       -      -
    160Y  ALA*     2.9    24.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 157 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41Y  ILE*     5.5    10.3    -      -       +      -
     42Y  PRO      5.8     0.9    -      -       -      -
     45Y  ASP*     2.7    46.6    +      -       -      -
     48Y  VAL*     5.3     0.9    -      -       -      +
    136Y  ALA*     3.5    36.0    -      -       +      +
    142Y  MET*     4.0     6.3    -      -       +      -
    143Y  PRO*     4.1    11.8    -      -       +      +
    144Y  GLY*     3.5    18.5    +      -       -      -
    145Y  MET      3.6     4.3    +      -       -      -
    146Y  GLN      4.5     0.5    +      -       -      -
    147Y  GLY*     3.1    48.8    -      -       -      -
    148Y  LEU      4.3     2.9    -      -       -      +
    149Y  VAL*     4.0     9.9    -      -       +      -
    154Y  PHE      5.1     1.4    +      -       -      +
    155Y  ALA      3.5     0.2    -      -       -      -
    156Y  PHE*     1.4    80.1    -      -       +      +
    158Y  PHE*     1.4    55.7    +      -       -      +
    160Y  ALA*     3.3     9.8    +      -       +      +
    161Y  VAL*     3.0    31.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 158 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    427C  LEU*     5.8    12.3    -      -       +      -
    431C  PRO*     5.9     7.4    -      -       +      -
    148Y  LEU      4.5     1.7    +      -       -      +
    149Y  VAL*     3.2    35.6    -      -       -      +
    150Y  ILE*     5.2     1.6    -      -       -      -
    151Y  ASN      4.5     8.3    -      -       -      +
    152Y  PRO*     6.1     1.1    -      -       +      -
    155Y  ALA*     3.2    28.7    +      -       +      +
    157Y  TYR*     1.4    73.0    -      -       -      +
    159Y  THR*     1.3    55.2    -      -       -      +
    161Y  VAL*     3.3    15.9    -      -       +      +
    162Y  VAL*     2.8    59.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 159 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    528G  PHE*     6.3     0.2    -      -       +      -
    532G  LEU*     3.9    25.4    -      -       +      -
     42Y  PRO*     3.7    25.4    -      -       +      -
    155Y  ALA*     2.8    25.0    +      -       -      +
    156Y  PHE*     3.2    16.1    -      -       -      -
    158Y  PHE*     1.3    76.2    -      -       -      +
    160Y  ALA*     1.4    58.6    +      -       -      +
    162Y  VAL*     4.2     6.6    -      -       +      +
    163Y  SER*     2.7    35.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 160 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41Y  ILE*     3.5    47.2    -      -       +      +
     42Y  PRO*     4.7     2.9    +      -       -      +
    136Y  ALA*     6.6     0.2    -      -       +      -
    156Y  PHE      2.9    14.3    +      -       -      +
    157Y  TYR*     3.3    11.0    +      -       +      +
    159Y  THR*     1.4    71.3    -      -       -      +
    161Y  VAL*     1.3    50.4    +      -       +      +
    163Y  SER*     3.2     8.2    +      -       -      -
    164Y  LEU*     2.8    44.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 161 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    427C  LEU*     6.0     5.4    -      -       +      -
    129Y  ILE*     5.3     4.7    -      -       +      +
    132Y  SER*     3.7    36.8    -      -       -      +
    133Y  ILE*     4.6     9.2    -      -       +      +
    136Y  ALA*     4.2     4.5    -      -       +      -
    149Y  VAL*     3.8    22.2    -      -       +      -
    157Y  TYR      3.0    16.9    +      -       -      +
    158Y  PHE*     3.3    19.3    -      -       +      +
    160Y  ALA*     1.3    65.5    -      -       +      +
    162Y  VAL*     1.4    65.7    +      -       +      +
    164Y  LEU*     3.4    10.8    +      -       +      +
    165Y  VAL*     3.1    29.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 162 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    427C  LEU*     5.8     6.7    -      -       +      -
    528G  PHE*     5.6     6.3    -      -       +      -
    158Y  PHE*     2.8    58.9    +      -       +      +
    159Y  THR*     4.2     6.3    -      -       +      +
    160Y  ALA      3.5     0.4    -      -       -      -
    161Y  VAL*     1.4    70.9    -      -       +      +
    163Y  SER*     1.3    56.5    +      -       -      +
    165Y  VAL*     3.4     3.4    +      -       -      +
    166Y  THR*     2.8    47.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 163 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    528G  PHE*     3.4    38.2    -      -       -      -
     42Y  PRO*     4.4     8.4    -      -       -      +
     77Y  ILE*     3.6    29.5    -      -       -      +
     78Y  PHE*     4.9     1.9    -      -       -      -
    159Y  THR*     2.7    26.2    +      -       -      +
    160Y  ALA*     3.4     6.3    -      -       -      -
    162Y  VAL*     1.3    74.9    -      -       -      +
    164Y  LEU*     1.4    54.1    +      -       -      +
    166Y  THR*     4.6     0.2    -      -       -      -
    167Y  GLY*     2.9    26.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 164 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41Y  ILE*     5.7     0.7    -      -       +      -
     76Y  SER      3.7     8.3    -      -       -      +
     77Y  ILE*     3.4    16.1    -      -       -      +
     78Y  PHE*     4.1     1.0    -      -       -      +
     79Y  ALA*     3.4    32.1    -      -       +      +
     80Y  LEU*     3.5    24.5    -      -       +      +
    132Y  SER*     3.6    30.7    -      -       -      +
    135Y  ILE*     5.2     6.7    -      -       +      -
    136Y  ALA*     6.3     0.7    -      -       +      -
    160Y  ALA*     2.8    34.8    +      -       +      +
    161Y  VAL*     3.6    11.7    -      -       +      +
    163Y  SER*     1.4    70.6    -      -       -      +
    165Y  VAL*     1.4    60.4    +      -       -      +
    167Y  GLY*     3.6     0.9    -      -       -      -
    168Y  THR*     2.8    32.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 165 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    423C  CYS*     3.4    33.9    -      -       +      -
    427C  LEU*     6.0     5.6    -      -       +      -
    125Y  LEU*     4.2     0.8    -      -       +      +
    128Y  ALA*     3.8    20.2    -      -       +      +
    129Y  ILE*     4.0    16.4    -      -       +      +
    132Y  SER*     3.3    23.6    -      -       -      +
    161Y  VAL*     3.1    17.8    +      -       +      +
    162Y  VAL*     4.2     3.1    -      -       -      +
    164Y  LEU*     1.4    72.4    -      -       -      +
    166Y  THR*     1.4    61.9    +      -       -      +
    168Y  THR*     3.3     8.6    +      -       -      -
    169Y  MET*     3.1    25.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 166 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    528G  PHE*     4.6    14.2    -      -       +      -
    162Y  VAL*     2.8    32.7    +      -       -      +
    165Y  VAL*     1.4    75.4    -      -       -      +
    167Y  GLY*     1.3    55.9    +      -       -      +
    169Y  MET*     3.1    16.9    +      -       +      +
    170Y  PHE*     3.0    52.9    +      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 167 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    528G  PHE*     5.8     1.0    -      -       -      -
     78Y  PHE*     3.7    31.7    -      -       -      -
    163Y  SER      2.9    19.4    +      -       -      -
    164Y  LEU      3.6     2.5    -      -       -      -
    165Y  VAL      3.2     0.2    -      -       -      -
    166Y  THR*     1.3    76.6    -      -       -      +
    168Y  THR*     1.4    50.5    -      -       -      +
    170Y  PHE*     3.3     8.9    +      -       -      +
    171Y  LEU*     2.8    34.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 168 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80Y  LEU*     3.5    19.9    -      -       -      +
     84Y  PRO*     5.2     1.6    -      -       +      +
    124Y  THR*     3.5    30.3    -      -       +      -
    125Y  LEU*     3.3    22.4    -      -       +      -
    128Y  ALA*     3.8     8.5    -      -       +      +
    164Y  LEU      2.8    21.6    +      -       -      -
    165Y  VAL*     3.3    10.3    +      -       -      -
    167Y  GLY*     1.4    71.5    -      -       -      +
    169Y  MET*     1.3    65.1    +      -       -      +
    170Y  PHE      3.3     0.2    -      -       -      -
    171Y  LEU*     4.4     9.9    -      -       +      +
    172Y  MET*     3.1    33.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 169 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    422C  GLY      3.8    11.4    -      -       -      +
    423C  CYS*     3.6    39.3    -      -       +      -
      3Y  LYS*     5.1     7.0    -      -       -      -
      6Y  GLY      4.6     7.6    -      -       -      +
      7Y  LEU*     3.4    26.4    -      -       +      +
    125Y  LEU*     3.6    23.1    -      -       +      -
    165Y  VAL*     3.1    18.8    +      -       +      +
    166Y  THR*     3.1    25.5    +      -       +      +
    168Y  THR*     1.3    77.4    -      -       -      +
    170Y  PHE*     1.3    58.1    +      -       +      +
    173Y  TRP*     3.1    24.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 170 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    521G  ALA*     4.3    13.9    -      -       +      -
    524G  ALA*     4.1    19.5    -      -       +      -
    525G  THR*     3.1    47.8    -      -       +      +
    528G  PHE*     3.9    23.8    -      +       -      -
     78Y  PHE*     5.4     1.6    -      +       +      -
    166Y  THR*     3.0    46.4    +      -       +      -
    167Y  GLY*     3.3     8.5    +      -       -      +
    168Y  THR      3.3     0.2    -      -       -      -
    169Y  MET*     1.3    78.8    -      -       +      +
    171Y  LEU*     1.3    57.0    +      -       -      +
    173Y  TRP*     3.1    14.4    +      +       +      +
    174Y  LEU*     3.0    32.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 171 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33Y  PHE*     4.4    26.9    -      -       +      -
     78Y  PHE*     6.1     8.9    -      -       +      +
     81Y  GLY      4.1    20.9    -      -       -      +
     82Y  ILE*     5.8     3.1    -      -       +      -
     85Y  TYR*     6.4     1.3    -      -       +      -
    124Y  THR*     6.3     0.7    -      -       +      -
    167Y  GLY      2.8    19.5    +      -       -      +
    168Y  THR*     4.3     8.7    -      -       +      +
    170Y  PHE*     1.3    67.0    -      -       -      +
    172Y  MET*     1.4    79.9    +      -       +      +
    174Y  LEU*     3.4    27.6    +      -       +      +
    175Y  GLY      3.4     8.5    +      -       -      -
    190Y  ILE*     4.0    20.6    -      -       +      +
    193Y  ALA*     4.5    21.5    -      -       +      +
    194Y  GLY*     5.3     1.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 172 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7Y  LEU*     3.9    23.3    -      -       +      +
     85Y  TYR*     3.8    31.6    -      -       +      -
    121Y  ARG*     3.6    43.0    +      -       +      +
    124Y  THR*     3.8    13.7    -      -       +      -
    125Y  LEU*     4.5     2.7    -      -       +      -
    168Y  THR*     3.1    32.2    +      -       +      +
    169Y  MET      3.9     1.1    -      -       -      +
    171Y  LEU*     1.4    98.0    -      -       +      +
    173Y  TRP*     1.3    60.8    +      -       -      +
    175Y  GLY*     3.1    13.5    +      -       -      -
    176Y  GLU*     3.9    14.5    +      -       -      +
    190Y  ILE*     4.2    12.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with TRP 173 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    516G  MET*     3.3    31.0    -      -       +      +
    518G  ARG*     3.8    25.4    -      -       +      -
    521G  ALA*     4.0    20.6    -      -       +      -
    522G  LEU*     4.1    17.7    -      -       +      -
    525G  THR*     5.8     2.2    -      -       -      -
      7Y  LEU*     3.3    26.4    +      -       -      +
      8Y  ASP      2.7    36.1    +      -       -      -
      9Y  PHE*     3.9     0.8    -      -       -      +
     10Y  GLN*     3.5    15.7    -      -       -      -
    169Y  MET      3.1    15.5    +      -       -      +
    170Y  PHE*     3.1    18.7    +      +       +      +
    172Y  MET*     1.3    73.5    -      -       -      +
    174Y  LEU*     1.3    72.4    +      -       +      +
    175Y  GLY      3.2     0.7    +      -       -      -
    176Y  GLU*     3.3     4.3    +      -       -      +
    177Y  GLN*     3.2    50.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 174 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    522G  LEU*     5.1     6.5    -      -       +      -
    525G  THR*     5.9     1.8    -      -       +      -
     28Y  GLY      5.7     0.2    -      -       -      -
     29Y  ALA*     3.9    37.4    -      -       +      +
     32Y  VAL*     3.7    36.1    -      -       +      -
     33Y  PHE*     4.9     2.2    -      -       +      +
     78Y  PHE*     6.3     0.2    -      -       +      -
    170Y  PHE*     3.0    19.1    +      -       +      +
    171Y  LEU*     3.4    26.7    -      -       +      +
    173Y  TRP*     1.3    91.6    -      -       +      +
    175Y  GLY*     1.4    60.7    +      -       -      +
    177Y  GLN*     2.8    34.3    +      -       +      +
    189Y  ILE*     4.6     6.3    -      -       -      +
    190Y  ILE*     6.0     0.2    -      -       +      -
    193Y  ALA*     5.4     2.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 175 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    394C  ARG*     6.3     0.2    -      -       -      -
    171Y  LEU      3.4     4.4    +      -       -      -
    172Y  MET      3.1     8.6    +      -       -      -
    174Y  LEU*     1.4    80.6    -      -       -      +
    176Y  GLU*     1.3    63.4    +      -       -      +
    178Y  ILE*     3.2    19.2    -      -       -      +
    184Y  GLY      4.9     0.2    -      -       -      +
    185Y  ASN*     5.1     2.1    -      -       -      +
    189Y  ILE*     3.6    23.8    -      -       -      +
    190Y  ILE*     3.7    24.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 176 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    394C  ARG*     2.6    49.1    +      -       -      +
    397C  LEU*     4.4     6.4    -      -       +      +
    509G  SER*     2.6    41.5    +      -       -      +
      7Y  LEU      5.9     1.8    -      -       -      +
      9Y  PHE*     3.9    16.3    -      -       +      +
    121Y  ARG*     2.9    29.7    +      -       -      +
    172Y  MET*     3.9    11.8    +      -       -      +
    173Y  TRP*     3.3     6.7    +      -       -      +
    175Y  GLY*     1.3    78.7    -      -       -      +
    177Y  GLN*     1.4    59.0    +      -       -      +
    178Y  ILE*     3.3     7.2    -      -       -      -
    179Y  THR*     3.6    13.3    +      -       -      -
    185Y  ASN*     4.9     1.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 177 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    522G  LEU*     6.5     0.4    -      -       -      -
      9Y  PHE*     4.3     3.3    -      -       -      -
     10Y  GLN*     3.1    32.5    +      -       -      +
     25Y  PHE*     3.3    52.6    +      -       -      +
     29Y  ALA*     4.6     4.9    -      -       -      +
    173Y  TRP*     3.2    49.6    +      -       +      +
    174Y  LEU*     2.8    39.5    +      -       +      +
    175Y  GLY      3.7     0.2    -      -       -      -
    176Y  GLU*     1.4    73.0    -      -       -      +
    178Y  ILE*     1.4    65.4    +      -       -      +
    179Y  THR*     3.1    11.2    +      -       -      -
    180Y  GLU*     4.0     0.9    +      -       -      +
----------------------------------------------------------
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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