Contacts of the helix formed by residues 125 - 149 (chain F) in PDB entry 3FZ7


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with GLY 125 (chain F).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    318A  SER      5.1     0.2    -      -       -      -
    123F  THR*     2.7    23.1    +      -       -      -
    124F  ILE*     1.3    80.8    -      -       -      +
    126F  SER*     1.3    65.1    +      -       -      -
    127F  SER      3.2     2.9    +      -       -      -
    128F  GLU*     3.5     4.3    +      -       -      +
    129F  ALA*     3.2    11.4    +      -       -      +
    275F  HIS*     3.8    11.7    -      -       -      -
    284F  CYS      4.1     0.2    -      -       -      -
    285F  GLY*     3.8    12.8    -      -       -      -
    467F  PO4      3.8    10.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 126 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125F  GLY*     1.3    69.7    -      -       -      -
    127F  SER*     1.3    56.8    +      -       -      +
    129F  ALA*     4.2     5.2    -      -       -      -
    130F  CYS*     2.7    49.2    +      -       -      -
    165F  CYS*     4.9     2.5    -      -       -      -
    243F  ASP*     4.7     0.7    +      -       -      -
    245F  ALA*     3.4    19.5    -      -       -      +
    271F  SER*     4.7     0.9    +      -       -      -
    272F  ALA*     3.3    20.1    +      -       -      -
    273F  SER*     2.6    25.3    +      -       -      -
    285F  GLY*     4.6     0.6    -      -       -      -
    467F  PO4      3.1    19.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 127 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    315A  ILE      2.8    24.2    +      -       -      -
    316A  ASN*     4.1     1.1    -      -       -      -
    317A  PHE*     4.0    19.1    -      -       -      +
    125F  GLY*     5.6     0.2    -      -       -      -
    126F  SER*     1.3    81.5    -      -       -      +
    128F  GLU*     1.3    63.4    +      -       -      +
    130F  CYS*     3.6     1.7    -      -       -      +
    131F  MET*     2.9    28.7    +      -       -      +
    165F  CYS*     3.5    27.5    -      -       -      +
    168F  LYS*     4.4     4.9    +      -       -      +
    467F  PO4      3.0    19.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 128 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    315A  ILE*     4.4     4.1    +      -       +      -
    316A  ASN*     3.9    13.3    +      -       -      +
    122F  ASN      5.4     0.4    -      -       -      -
    123F  THR*     3.3    20.4    -      -       +      -
    124F  ILE*     3.0    25.1    +      -       -      +
    125F  GLY      3.5     4.7    +      -       -      +
    126F  SER      3.5     0.2    -      -       -      -
    127F  SER*     1.3    76.2    -      -       -      +
    129F  ALA*     1.3    64.1    +      -       -      +
    131F  MET*     3.0    11.3    +      -       -      +
    132F  LEU*     2.9    32.0    +      -       +      +
    314F  ALA*     3.7     8.7    -      -       -      +
    315F  ILE*     2.9    39.8    +      -       +      +
    316F  ASN*     3.0    30.8    +      -       -      +
    319F  ARG*     4.7     3.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 129 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123F  THR*     3.7    16.7    -      -       +      +
    125F  GLY      3.2    16.5    +      -       -      +
    126F  SER*     3.7     6.5    -      -       -      +
    128F  GLU*     1.3    77.8    -      -       -      +
    130F  CYS*     1.3    57.2    +      -       -      +
    132F  LEU*     3.3     3.4    +      -       -      +
    133F  GLY*     2.9    25.1    +      -       -      -
    271F  SER*     3.7    11.0    -      -       -      -
    272F  ALA      4.9     0.2    -      -       -      +
    286F  TRP      3.6    24.2    -      -       -      +
    287F  VAL*     3.7    20.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with CYS 130 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126F  SER*     2.7    31.5    +      -       -      +
    127F  SER      3.6     3.1    -      -       -      +
    129F  ALA*     1.3    69.4    -      -       -      +
    131F  MET*     1.3    54.4    +      -       +      +
    133F  GLY*     3.0     1.9    +      -       -      -
    134F  GLY*     2.6    35.0    +      -       -      -
    165F  CYS*     3.3    35.0    -      -       +      +
    166F  TRP*     3.4    41.0    -      -       +      -
    169F  PHE*     5.6     0.4    -      -       +      -
    241F  HIS*     4.7     1.1    -      -       -      -
    243F  ASP*     3.9     8.5    -      -       -      -
    271F  SER*     3.7    16.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with MET 131 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    315A  ILE*     3.5    46.9    -      -       +      +
    127F  SER*     2.9    19.5    -      -       -      +
    128F  GLU*     3.0     8.7    +      -       -      +
    130F  CYS*     1.3    76.3    -      -       -      +
    132F  LEU*     1.3    53.4    +      -       -      +
    135F  MET*     2.7    40.7    +      -       +      +
    165F  CYS      4.4     8.3    -      -       -      +
    168F  LYS*     5.0     6.7    -      -       +      -
    169F  PHE*     4.1    21.9    -      -       -      -
    172F  TYR*     4.8     8.1    -      -       +      -
    173F  TRP*     3.7    28.9    -      -       +      -
    315F  ILE*     3.6    21.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 132 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121F  THR*     3.6    21.1    -      -       +      -
    123F  THR*     3.8    19.1    -      -       +      -
    128F  GLU*     2.9    23.1    +      -       +      +
    129F  ALA      3.7     4.3    -      -       -      +
    131F  MET*     1.3    76.4    -      -       -      +
    133F  GLY*     1.3    63.5    +      -       -      +
    135F  MET*     4.0    11.2    -      -       +      -
    136F  ALA*     3.0    27.4    +      -       -      +
    287F  VAL*     4.0     2.2    -      -       +      -
    289F  TRP*     4.0     8.3    -      -       +      -
    313F  PHE*     3.4    63.5    -      -       +      +
    314F  ALA*     4.3     2.0    -      -       +      -
    315F  ILE*     4.1    23.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 133 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129F  ALA      2.9    15.4    +      -       -      -
    130F  CYS      3.4     3.1    -      -       -      -
    132F  LEU*     1.3    76.6    -      -       -      +
    134F  GLY*     1.3    56.9    +      -       -      +
    136F  ALA*     3.6     2.3    +      -       -      +
    137F  MET*     2.9    35.9    +      -       -      +
    140F  ARG*     5.2     0.2    +      -       -      -
    166F  TRP*     4.9     0.4    -      -       -      -
    241F  HIS*     3.9    22.7    -      -       -      -
    269F  SER*     4.3     7.4    +      -       -      -
    287F  VAL*     4.6     0.4    -      -       -      -
    289F  TRP*     4.3     9.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 134 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130F  CYS      2.6    19.9    +      -       -      -
    133F  GLY*     1.3    71.4    -      -       -      +
    135F  MET*     1.3    58.7    +      -       -      +
    137F  MET*     3.1    19.4    +      -       -      +
    138F  LYS*     2.8    24.1    +      -       -      +
    166F  TRP*     4.1     4.2    -      -       -      -
    169F  PHE*     3.4    31.3    -      -       -      -
    203F  ILE*     4.0     0.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 135 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172A  TYR*     3.6    42.2    -      -       +      +
    131F  MET      2.7    21.6    +      -       -      +
    132F  LEU*     3.9    29.4    -      -       +      +
    134F  GLY*     1.3    71.1    -      -       -      +
    136F  ALA*     1.3    54.1    +      -       -      +
    138F  LYS*     2.8    26.8    +      -       -      +
    139F  TRP*     2.8    21.3    +      -       +      -
    169F  PHE*     3.5     2.2    -      -       -      -
    173F  TRP*     3.4    53.2    -      -       +      +
    299F  LEU*     3.9    10.1    -      -       +      -
    313F  PHE*     4.0    12.1    -      -       +      -
    315F  ILE*     4.1     9.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 136 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132F  LEU      3.0    18.9    +      -       -      +
    133F  GLY      3.7     2.7    -      -       -      +
    135F  MET*     1.3    76.4    -      -       -      +
    137F  MET*     1.3    55.8    +      -       -      +
    139F  TRP*     3.3     1.4    +      -       -      +
    140F  ARG*     2.9    39.3    +      -       -      +
    289F  TRP*     3.4    26.5    -      -       -      +
    295F  LEU*     4.0    17.3    -      -       +      -
    296F  PRO*     3.8     5.1    -      -       +      +
    299F  LEU*     3.5    14.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 137 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133F  GLY      2.9    11.9    +      -       -      +
    134F  GLY*     3.1    24.4    +      -       -      +
    136F  ALA*     1.3    75.7    -      -       -      +
    138F  LYS*     1.3    63.3    +      -       -      +
    140F  ARG*     3.4    29.2    +      -       -      +
    141F  TRP*     3.1    24.8    +      -       -      +
    157F  LEU*     3.7    22.9    -      -       +      -
    166F  TRP*     4.1     5.4    -      -       +      -
    203F  ILE*     3.8    17.3    -      -       +      +
    204F  GLY*     3.5    30.7    -      -       -      -
    206F  VAL*     3.7    15.5    -      -       +      -
    239F  ASP*     5.5     0.7    -      -       +      -
    240F  MET      4.7     0.9    -      -       -      -
    241F  HIS*     3.8    29.4    -      -       +      +
    269F  SER*     5.3     0.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 138 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172A  TYR      5.8     0.4    +      -       -      -
    174A  ASP*     4.1    13.3    +      -       -      -
    134F  GLY      2.8    12.2    +      -       -      +
    135F  MET*     2.8    10.8    +      -       -      +
    137F  MET*     1.3    76.8    -      -       -      +
    139F  TRP*     1.3    67.8    +      -       +      +
    141F  TRP*     3.2    14.3    +      -       +      +
    142F  ARG*     2.8    56.7    +      -       +      +
    152F  THR      6.0     0.9    -      -       -      -
    155F  PRO*     4.5    14.3    -      -       +      +
    169F  PHE*     4.8     0.4    -      -       +      -
    173F  TRP*     2.7    40.4    +      -       +      +
    174F  ASP*     4.7     5.3    +      -       -      +
    175F  VAL*     4.0    16.4    -      -       +      +
    203F  ILE*     4.0    17.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 139 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    171A  ARG*     3.4    33.2    -      -       +      +
    172A  TYR*     3.8    17.7    -      -       -      -
    174A  ASP*     3.7     5.6    -      -       -      -
    135F  MET*     2.8    33.0    +      -       +      +
    138F  LYS*     1.3    92.2    -      -       +      +
    140F  ARG*     1.3    60.2    +      -       -      +
    142F  ARG*     3.1    39.1    -      -       +      +
    143F  LYS*     2.8    38.7    +      -       +      +
    173F  TRP*     5.0     1.1    -      +       -      -
    296F  PRO*     3.6    19.5    -      -       +      -
    298F  GLU*     3.6    39.3    -      -       +      +
    299F  LEU*     3.6    27.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 140 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136F  ALA*     2.9    29.9    +      -       -      +
    137F  MET*     3.4    34.6    +      -       -      +
    138F  LYS      3.3     0.2    -      -       -      -
    139F  TRP*     1.3    75.9    -      -       -      +
    141F  TRP*     1.3    63.9    +      -       -      +
    143F  LYS*     3.9     6.3    -      -       -      +
    144F  ARG*     3.1    24.4    +      -       -      +
    203F  ILE      5.0     1.0    +      -       -      -
    239F  ASP*     4.0    19.8    +      -       -      +
    240F  MET      4.8     1.4    +      -       -      -
    268F  LYS*     3.5    38.4    -      -       -      +
    269F  SER*     4.7     4.2    +      -       -      -
    289F  TRP*     4.2     5.9    -      -       -      +
    293F  GLU      4.1     6.7    -      -       -      +
    294F  ALA*     2.8    44.8    +      -       -      +
    296F  PRO*     3.8    15.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 141 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137F  MET      3.1    17.6    +      -       -      +
    138F  LYS*     3.5     9.4    -      -       +      +
    140F  ARG*     1.3    75.5    -      -       -      +
    142F  ARG*     1.3    88.8    +      -       +      +
    144F  ARG*     3.2    20.8    +      -       +      +
    145F  MET*     3.0    44.6    +      -       +      +
    152F  THR*     3.7    36.8    -      -       +      -
    155F  PRO*     3.6    26.5    -      -       +      -
    200F  GLU      2.9    21.8    +      -       -      -
    201F  ASN*     3.7    34.8    -      -       -      +
    202F  THR      3.6    17.9    -      -       -      -
    203F  ILE*     3.6    26.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 142 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    174A  ASP*     2.9    41.5    +      -       -      -
    138F  LYS*     2.8    36.5    +      -       +      +
    139F  TRP*     3.1    47.2    -      -       +      +
    141F  TRP*     1.3    88.5    -      -       +      +
    143F  LYS*     1.3    57.2    +      -       +      +
    145F  MET*     3.2     1.7    +      -       -      -
    146F  GLU*     2.9    55.3    +      -       -      +
    152F  THR*     3.6    35.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 143 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    139F  TRP*     2.8    28.7    +      -       +      +
    140F  ARG*     3.9     5.8    -      -       -      +
    142F  ARG*     1.3    74.0    -      -       +      +
    144F  ARG*     1.3    57.6    +      -       -      +
    146F  GLU*     3.8    13.9    -      -       -      +
    147F  ALA*     2.9    29.8    +      -       -      +
    296F  PRO*     4.2    20.9    -      -       +      +
    297F  GLN      4.7     1.6    -      -       -      +
    298F  GLU*     3.2    41.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 144 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140F  ARG      3.1    18.2    +      -       -      +
    141F  TRP*     3.6    19.5    -      -       -      +
    142F  ARG      3.2     0.2    -      -       -      -
    143F  LYS*     1.3    77.2    -      -       -      +
    145F  MET*     1.3    66.3    +      -       +      +
    147F  ALA*     3.4     8.9    +      -       +      +
    148F  ALA*     3.2    22.3    +      -       +      +
    202F  THR      5.9     0.8    +      -       -      -
    236F  ILE*     5.8     1.8    -      -       -      +
    237F  ASP*     2.8    58.3    +      -       -      +
    239F  ASP*     4.4    13.9    +      -       -      -
    268F  LYS*     5.8     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 145 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141F  TRP*     3.0    35.1    +      -       +      +
    144F  ARG*     1.3    78.2    -      -       +      +
    146F  GLU*     1.3    55.0    +      -       -      +
    148F  ALA*     2.9     6.9    +      -       -      +
    149F  GLY      2.7    30.7    +      -       -      -
    150F  LYS*     2.9    42.4    +      -       +      +
    151F  PRO*     3.4    20.2    -      -       +      +
    152F  THR*     3.7    16.6    -      -       +      -
    200F  GLU*     3.4    34.5    -      -       +      +
    201F  ASN*     4.0    12.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 146 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142F  ARG*     2.9    44.7    +      -       -      +
    143F  LYS*     3.8    15.7    -      -       -      +
    145F  MET*     1.3    71.5    -      -       -      +
    147F  ALA*     1.3    63.0    +      -       -      +
    148F  ALA      2.9     5.3    +      -       -      -
    149F  GLY*     2.9    14.4    +      -       -      +
    150F  LYS      4.8     2.7    -      -       -      +
    152F  THR*     4.2    11.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 147 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    143F  LYS      2.9    19.3    +      -       -      +
    144F  ARG*     3.5     8.7    -      -       +      +
    146F  GLU*     1.3    75.8    -      -       -      +
    148F  ALA*     1.3    58.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 148 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144F  ARG*     3.2    15.1    +      -       +      +
    145F  MET*     2.9     8.1    +      -       -      +
    147F  ALA*     1.3    79.9    -      -       +      +
    149F  GLY*     1.3    59.1    +      -       -      +
    150F  LYS*     3.3    30.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 149 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145F  MET      2.7     9.2    +      -       -      -
    146F  GLU*     2.9    12.6    +      -       -      -
    147F  ALA      3.5     0.6    +      -       -      -
    148F  ALA*     1.3    75.3    -      -       -      +
    150F  LYS*     1.3    58.9    +      -       -      -
    151F  PRO*     4.3     1.2    -      -       -      +
----------------------------------------------------------
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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