Contacts of the helix formed by residues 125 - 148 (chain A) 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 A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123A  THR*     2.6    24.0    +      -       -      -
    124A  ILE*     1.3    82.0    -      -       -      +
    126A  SER*     1.3    65.9    +      -       -      -
    127A  SER*     3.2     3.4    +      -       -      -
    128A  GLU*     3.7     4.1    +      -       -      +
    129A  ALA*     3.4     7.3    +      -       -      +
    275A  HIS*     3.8    11.7    -      -       -      -
    284A  CYS      4.2     0.2    -      -       -      -
    285A  GLY*     3.6    13.9    -      -       -      -
    467A  PO4      3.7     8.1    -      -       -      -
    316F  ASN*     5.2     0.4    +      -       -      -
    318F  SER      5.0     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 126 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125A  GLY*     1.3    70.7    -      -       -      -
    127A  SER*     1.3    58.8    +      -       -      +
    129A  ALA*     3.4     8.1    +      -       -      +
    130A  CYS*     2.8    43.1    +      -       -      -
    163A  GLN*     6.5     0.2    -      -       -      -
    165A  CYS*     5.0     1.1    -      -       -      -
    243A  ASP*     5.1     1.1    +      -       -      -
    245A  ALA*     3.7    15.1    -      -       -      +
    271A  SER*     4.9     1.1    -      -       -      -
    272A  ALA*     3.2     7.2    +      -       -      -
    273A  SER*     2.6    40.6    +      -       -      -
    276A  LYS*     4.4     0.2    -      -       -      -
    285A  GLY*     4.4     0.4    -      -       -      -
    467A  PO4      3.0    20.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 127 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125A  GLY      3.2     0.4    -      -       -      -
    126A  SER*     1.3    72.6    -      -       -      +
    128A  GLU*     1.3    66.7    +      -       -      +
    130A  CYS*     3.1     5.7    +      -       -      +
    131A  MET*     3.0    32.6    +      -       -      +
    165A  CYS*     4.0    20.4    -      -       -      +
    168A  LYS*     4.2     4.3    +      -       -      -
    467A  PO4      2.8    18.8    +      -       -      -
    315F  ILE      2.5    25.7    +      -       -      -
    316F  ASN*     3.8     4.1    +      -       -      -
    317F  PHE*     3.7    19.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 128 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122A  ASN      5.4     0.4    -      -       -      -
    123A  THR*     3.3    21.3    -      -       +      -
    124A  ILE      3.0    20.6    +      -       -      +
    125A  GLY      3.7     4.0    +      -       -      +
    127A  SER*     1.3    77.9    -      -       -      +
    129A  ALA*     1.3    66.1    +      -       -      +
    131A  MET*     3.0    13.8    +      -       -      +
    132A  LEU*     3.0    32.6    +      -       +      +
    314A  ALA*     3.7     6.5    -      -       -      +
    315A  ILE*     2.8    38.1    +      -       +      -
    316A  ASN*     2.8    35.5    +      -       -      +
    319A  ARG*     4.9     1.5    +      -       -      -
    315F  ILE*     4.3     3.6    +      -       +      -
    316F  ASN*     3.8    14.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 129 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123A  THR*     3.7    24.4    -      -       +      +
    125A  GLY      3.4     4.8    +      -       -      +
    126A  SER*     3.4    11.4    +      -       -      +
    127A  SER      3.3     0.2    -      -       -      -
    128A  GLU*     1.3    79.9    -      -       -      +
    130A  CYS*     1.3    55.4    +      -       -      +
    132A  LEU*     3.3     3.2    +      -       -      +
    133A  GLY*     3.0    25.1    +      -       -      -
    271A  SER*     3.7    15.4    -      -       -      -
    286A  TRP      3.8     7.2    -      -       -      +
    287A  VAL*     3.7    30.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with CYS 130 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126A  SER*     2.8    29.4    +      -       -      -
    127A  SER      3.1     8.3    +      -       -      +
    129A  ALA*     1.3    70.3    -      -       -      +
    131A  MET*     1.3    57.4    +      -       -      +
    133A  GLY      3.2     1.4    +      -       -      -
    134A  GLY*     2.6    34.1    +      -       -      -
    165A  CYS*     2.9    37.7    -      -       +      +
    166A  TRP*     3.5    36.4    -      -       +      -
    169A  PHE*     5.3     0.4    -      -       +      -
    241A  HIS*     4.7     0.9    -      -       -      -
    243A  ASP*     4.1     7.0    -      -       -      -
    271A  SER*     4.0    12.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with MET 131 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    127A  SER*     3.0    25.4    +      -       -      +
    128A  GLU*     3.3     7.9    -      -       -      +
    130A  CYS*     1.3    75.3    -      -       -      +
    132A  LEU*     1.3    54.5    +      -       -      +
    134A  GLY*     3.7     0.2    -      -       -      -
    135A  MET*     2.7    40.2    +      -       -      +
    165A  CYS*     4.3     6.7    -      -       +      +
    168A  LYS*     4.3    22.7    -      -       +      -
    169A  PHE*     4.1    21.6    -      -       -      -
    172A  TYR*     4.9     3.1    -      -       +      -
    173A  TRP*     3.7    29.6    -      -       +      -
    315A  ILE*     3.5    29.6    -      -       +      -
    315F  ILE*     3.3    36.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 132 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121A  THR*     3.8    19.7    -      -       +      -
    123A  THR*     3.9    20.0    -      -       +      -
    128A  GLU*     3.0    20.4    +      -       +      +
    129A  ALA      3.7     5.2    -      -       -      +
    131A  MET*     1.3    71.8    -      -       -      +
    133A  GLY*     1.3    57.3    -      -       -      +
    135A  MET*     3.3     9.8    +      -       +      -
    136A  ALA*     2.8    36.7    +      -       -      +
    287A  VAL*     4.0     2.0    -      -       +      -
    289A  TRP*     3.8    12.8    -      -       +      -
    313A  PHE*     3.4    68.4    -      -       +      +
    314A  ALA*     4.2    12.6    -      -       +      -
    315A  ILE*     4.4     6.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 133 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129A  ALA      3.0    13.7    +      -       -      -
    130A  CYS      3.5     3.4    -      -       -      -
    132A  LEU*     1.3    76.4    -      -       -      +
    134A  GLY*     1.3    54.8    +      -       -      +
    136A  ALA*     3.6     2.9    -      -       -      +
    137A  MET*     3.0    35.6    +      -       -      +
    166A  TRP*     4.9     0.4    -      -       -      -
    241A  HIS*     3.9    24.0    -      -       -      -
    269A  SER*     4.3     7.2    +      -       -      -
    287A  VAL*     4.9     0.2    -      -       -      -
    289A  TRP*     4.1     9.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 134 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130A  CYS      2.6    19.9    +      -       -      -
    133A  GLY*     1.3    68.9    -      -       -      +
    135A  MET*     1.3    67.7    +      -       -      +
    137A  MET*     3.1    18.3    +      -       -      +
    138A  LYS*     2.9    19.8    +      -       -      +
    166A  TRP*     4.2     3.7    -      -       -      -
    169A  PHE*     3.4    30.7    -      -       -      -
    203A  ILE*     4.2     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 135 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131A  MET      2.7    23.8    +      -       -      +
    132A  LEU*     3.8    14.1    -      -       +      +
    134A  GLY*     1.3    74.1    -      -       -      +
    136A  ALA*     1.3    62.7    +      -       -      +
    138A  LYS*     3.3     5.2    +      -       -      -
    139A  TRP*     3.0    36.3    +      -       +      +
    169A  PHE*     3.5     3.3    -      -       +      -
    173A  TRP*     3.3    48.2    -      -       +      +
    299A  LEU*     4.0     5.4    -      -       +      -
    313A  PHE*     3.5    31.0    -      -       +      -
    315A  ILE*     4.6     5.4    -      -       +      -
    172F  TYR*     3.5    43.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 136 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132A  LEU      2.8    21.2    +      -       -      +
    133A  GLY      3.6     3.4    -      -       -      +
    135A  MET*     1.3    72.2    -      -       -      +
    137A  MET*     1.3    53.1    +      -       -      +
    139A  TRP*     3.1     2.6    +      -       -      +
    140A  ARG*     2.8    49.6    +      -       -      +
    289A  TRP*     3.6    26.5    -      -       +      +
    295A  LEU*     4.4     2.7    -      -       +      -
    296A  PRO*     4.1    13.1    -      -       +      +
    299A  LEU*     3.8    15.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 137 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133A  GLY      3.0    11.3    +      -       -      +
    134A  GLY*     3.4    23.6    -      -       -      +
    136A  ALA*     1.3    74.4    -      -       -      +
    138A  LYS*     1.3    64.0    +      -       -      +
    140A  ARG*     3.2    29.5    +      -       -      +
    141A  TRP*     2.9    25.5    +      -       -      +
    157A  LEU*     3.5    25.8    -      -       +      -
    166A  TRP*     4.2     4.7    -      -       +      -
    203A  ILE*     3.8    17.2    -      -       +      +
    204A  GLY*     3.6    29.6    -      -       -      -
    205A  VAL      4.5     1.6    -      -       -      -
    206A  VAL*     3.9    14.6    -      -       +      -
    239A  ASP*     5.0     0.7    -      -       +      +
    240A  MET      4.8     1.1    -      -       -      -
    241A  HIS*     4.1    25.8    -      -       +      +
    269A  SER*     5.3     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 138 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134A  GLY      2.9    13.0    +      -       -      +
    135A  MET*     3.6     9.6    -      -       -      +
    137A  MET*     1.3    77.0    -      -       -      +
    139A  TRP*     1.3    72.8    +      -       +      +
    141A  TRP*     3.3     8.5    +      -       +      +
    142A  ARG*     2.8    56.7    +      -       +      +
    152A  THR      6.0     0.9    -      -       -      -
    155A  PRO*     4.3    12.1    -      -       +      -
    169A  PHE*     4.8     2.2    -      -       +      -
    173A  TRP*     3.0    40.1    +      -       +      +
    174A  ASP*     4.8     2.6    +      -       -      +
    175A  VAL*     4.2    16.6    -      -       +      -
    203A  ILE*     3.7    25.1    -      -       +      +
    174F  ASP*     3.8     9.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 139 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135A  MET*     3.0    44.5    +      -       +      +
    138A  LYS*     1.3    91.8    -      -       +      +
    140A  ARG*     1.3    66.4    +      -       -      +
    142A  ARG*     3.2    38.5    -      -       +      +
    143A  LYS*     3.1    31.6    +      -       +      +
    173A  TRP*     4.9     1.1    -      +       -      -
    296A  PRO*     3.6    23.1    -      -       +      -
    298A  GLU*     4.1    29.3    -      -       +      +
    299A  LEU*     3.7    26.3    -      -       +      +
    171F  ARG*     3.3    32.2    -      -       +      +
    172F  TYR*     3.5    20.6    -      -       -      -
    174F  ASP*     3.8     5.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 140 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136A  ALA*     2.8    35.1    +      -       -      +
    137A  MET*     3.4    33.9    -      -       -      +
    139A  TRP*     1.3    72.6    -      -       -      +
    141A  TRP*     1.3    62.4    +      -       -      +
    143A  LYS*     3.4     7.5    +      -       -      +
    144A  ARG*     3.2    27.4    +      -       -      +
    203A  ILE      5.2     0.8    +      -       -      -
    239A  ASP*     4.1    23.9    +      -       -      +
    240A  MET      4.8     2.2    +      -       -      -
    268A  LYS*     3.6    32.2    -      -       -      +
    269A  SER*     4.6     4.9    +      -       -      -
    289A  TRP*     4.3     5.5    -      -       -      -
    293A  GLU      4.2     6.3    -      -       -      +
    294A  ALA*     2.8    44.0    +      -       -      +
    296A  PRO*     3.9    16.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 141 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137A  MET      2.9    17.6    +      -       -      +
    138A  LYS*     3.6     8.7    -      -       +      +
    140A  ARG*     1.3    78.0    -      -       -      +
    142A  ARG*     1.3    87.0    +      -       +      +
    144A  ARG*     3.2    15.7    +      -       +      +
    145A  MET*     3.1    40.5    +      -       +      +
    152A  THR*     3.6    40.4    -      -       -      -
    154A  LYS      4.4     0.2    -      -       -      -
    155A  PRO*     3.8    22.7    -      -       +      -
    200A  GLU      3.1    19.3    +      -       -      -
    201A  ASN*     3.6    38.2    -      -       -      -
    202A  THR      3.3    19.1    -      -       -      -
    203A  ILE*     3.4    26.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 142 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    138A  LYS*     2.8    46.8    +      -       +      +
    139A  TRP*     3.2    42.0    -      -       +      +
    140A  ARG      3.4     0.2    -      -       -      -
    141A  TRP*     1.3    90.4    -      -       +      +
    143A  LYS*     1.3    67.4    +      -       +      +
    145A  MET*     3.3     1.4    +      -       -      +
    146A  GLU*     2.9    43.4    +      -       -      +
    152A  THR*     4.0    26.7    +      -       -      +
    174F  ASP*     2.8    43.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 143 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    139A  TRP*     3.1    23.3    +      -       +      +
    140A  ARG*     3.8     7.6    -      -       -      +
    141A  TRP      3.4     0.2    -      -       -      -
    142A  ARG*     1.3    77.5    -      -       +      +
    144A  ARG*     1.3    62.4    +      -       -      +
    146A  GLU*     3.5    13.4    +      -       -      +
    147A  ALA*     3.0    26.3    +      -       -      +
    296A  PRO*     3.9    20.4    -      -       +      +
    297A  GLN      4.7     1.2    -      -       -      +
    298A  GLU*     2.8    43.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 144 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140A  ARG*     3.2    19.9    +      -       -      +
    141A  TRP*     3.6    18.1    -      -       +      +
    143A  LYS*     1.3    78.6    -      -       -      +
    145A  MET*     1.3    65.2    +      -       +      +
    147A  ALA*     3.5     5.9    +      -       -      +
    148A  ALA*     3.0    23.8    +      -       -      +
    237A  ASP*     2.2    57.0    +      -       -      +
    238A  ILE*     4.7     0.4    -      -       -      +
    239A  ASP*     3.4    24.5    +      -       -      +
    268A  LYS*     4.7     4.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 145 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141A  TRP*     3.1    35.4    +      -       +      +
    142A  ARG      3.9     0.2    -      -       -      +
    143A  LYS      3.3     0.2    -      -       -      -
    144A  ARG*     1.3    75.6    -      -       +      +
    146A  GLU*     1.3    53.8    +      -       -      +
    148A  ALA*     2.8     5.5    +      -       -      -
    149A  GLY      2.7    31.9    +      -       -      -
    150A  LYS*     3.0    45.6    +      -       +      +
    151A  PRO*     3.7    11.9    -      -       +      +
    152A  THR*     3.7    19.5    -      -       +      -
    200A  GLU*     3.4    38.4    -      -       +      +
    201A  ASN*     3.8    11.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 146 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142A  ARG*     2.9    38.6    +      -       -      +
    143A  LYS*     3.9    15.0    +      -       -      +
    145A  MET*     1.3    76.2    -      -       -      +
    147A  ALA*     1.3    62.7    +      -       -      +
    149A  GLY*     3.2    12.7    +      -       -      +
    150A  LYS      4.8     4.0    -      -       -      +
    152A  THR*     4.2    14.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 147 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    143A  LYS      3.0    18.3    +      -       -      +
    144A  ARG*     3.7     7.0    -      -       +      +
    146A  GLU*     1.3    76.5    -      -       -      +
    148A  ALA*     1.3    57.9    +      -       -      +
    149A  GLY      3.3     2.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 148 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144A  ARG      3.0    15.7    +      -       -      +
    145A  MET*     2.8     9.7    +      -       -      +
    147A  ALA*     1.3    75.1    -      -       +      +
    149A  GLY*     1.3    58.6    +      -       -      +
    150A  LYS*     3.3    30.4    +      -       +      -
----------------------------------------------------------
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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