Contacts of the helix formed by residues 125 - 148 (chain E) 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 E).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    318D  SER      5.1     0.2    -      -       -      -
    123E  THR*     2.6    25.6    +      -       -      -
    124E  ILE*     1.3    82.0    -      -       -      +
    126E  SER*     1.3    65.8    +      -       -      -
    127E  SER*     3.1     3.3    +      -       -      -
    128E  GLU*     3.6     3.4    +      -       -      +
    129E  ALA      3.2     8.8    +      -       -      -
    275E  HIS*     3.8    10.3    -      -       -      -
    284E  CYS      4.2     0.2    -      -       -      -
    285E  GLY*     3.8    12.8    -      -       -      -
    467E  PO4      3.6     9.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 126 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125E  GLY*     1.3    73.1    -      -       -      -
    127E  SER*     1.3    52.6    +      -       -      +
    129E  ALA*     3.1     8.4    +      -       -      +
    130E  CYS*     2.7    47.0    +      -       -      -
    163E  GLN*     5.9     0.2    -      -       -      -
    165E  CYS*     5.4     1.6    -      -       -      -
    243E  ASP*     4.8     1.9    +      -       -      -
    245E  ALA*     3.6    16.6    -      -       -      +
    271E  SER*     4.8     1.2    -      -       -      -
    272E  ALA*     3.4     8.0    +      -       -      -
    273E  SER*     2.6    34.8    +      -       -      -
    285E  GLY*     4.5     0.6    -      -       -      -
    467E  PO4      3.1    21.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 127 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    315D  ILE      2.9    23.4    +      -       -      -
    316D  ASN*     3.9     3.7    +      -       -      -
    317D  PHE*     3.8    20.1    -      -       -      +
    126E  SER*     1.3    76.6    -      -       -      +
    128E  GLU*     1.3    70.1    +      -       -      +
    130E  CYS*     3.1     9.0    +      -       -      +
    131E  MET*     3.1    21.4    +      -       -      +
    165E  CYS*     3.7    25.4    -      -       -      +
    168E  LYS*     4.5     4.2    -      -       -      -
    467E  PO4      2.9    18.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 128 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    315D  ILE*     4.4     5.6    +      -       +      -
    316D  ASN*     3.7    15.1    +      -       -      +
    122E  ASN      5.2     0.7    -      -       -      -
    123E  THR*     3.3    21.0    -      -       +      -
    124E  ILE      2.9    21.4    +      -       -      +
    125E  GLY*     3.6     4.3    +      -       -      +
    126E  SER      3.4     0.2    -      -       -      -
    127E  SER*     1.3    77.2    -      -       -      +
    129E  ALA*     1.3    64.6    +      -       -      +
    131E  MET*     3.0    21.8    +      -       -      +
    132E  LEU*     3.1    16.4    +      -       +      +
    314E  ALA*     3.7     9.4    -      -       -      +
    315E  ILE*     2.8    39.4    +      -       +      +
    316E  ASN*     2.7    32.8    +      -       -      +
    319E  ARG*     4.6     3.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 129 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123E  THR*     3.7    15.2    -      -       +      +
    125E  GLY      3.2    13.0    +      -       -      +
    126E  SER*     3.1    11.1    +      -       -      +
    128E  GLU*     1.3    78.4    -      -       -      +
    130E  CYS*     1.3    57.2    +      -       -      +
    132E  LEU*     3.3     2.9    +      -       -      +
    133E  GLY*     3.0    25.5    +      -       -      -
    241E  HIS*     4.6     0.2    -      -       -      -
    271E  SER*     3.7    23.1    -      -       -      -
    286E  TRP      3.7    13.7    -      -       -      +
    287E  VAL*     3.8    17.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with CYS 130 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126E  SER*     2.7    23.8    +      -       -      -
    127E  SER      3.1     4.9    +      -       -      +
    129E  ALA*     1.3    69.0    -      -       -      +
    131E  MET*     1.3    59.1    +      -       -      +
    133E  GLY      3.3     0.2    +      -       -      -
    134E  GLY*     2.7    33.8    +      -       -      -
    165E  CYS*     2.8    40.6    -      -       +      +
    166E  TRP*     3.5    38.4    -      -       +      -
    169E  PHE*     5.2     0.4    -      -       -      -
    241E  HIS*     4.9     0.9    -      -       -      -
    243E  ASP*     4.2     7.0    -      -       -      -
    271E  SER*     4.0    13.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with MET 131 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    315D  ILE*     3.6    31.0    -      -       +      +
    127E  SER*     3.1    21.7    +      -       -      +
    128E  GLU*     3.0     4.6    +      -       -      +
    130E  CYS*     1.3    76.1    -      -       -      +
    132E  LEU*     1.3    54.3    +      -       -      +
    134E  GLY      3.0     0.2    +      -       -      -
    135E  MET*     2.7    39.6    +      -       -      +
    165E  CYS*     4.3     5.8    -      -       +      +
    168E  LYS*     4.1    24.7    -      -       +      -
    169E  PHE*     4.0    23.9    -      -       -      -
    172E  TYR*     4.9     2.5    -      -       +      -
    173E  TRP*     3.5    30.5    -      -       +      -
    315E  ILE*     3.5    31.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 132 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121E  THR*     3.7    20.0    -      -       +      -
    123E  THR*     4.0    11.9    -      -       +      -
    128E  GLU*     3.1    15.5    +      -       +      +
    129E  ALA      3.6     5.8    -      -       -      +
    131E  MET*     1.3    74.7    -      -       -      +
    133E  GLY*     1.3    57.9    +      -       -      +
    135E  MET*     3.5     9.6    +      -       +      -
    136E  ALA*     3.0    26.2    +      -       -      +
    287E  VAL*     4.0     8.1    -      -       +      -
    289E  TRP*     3.7    17.4    -      -       +      -
    313E  PHE*     3.4    61.9    -      -       +      +
    314E  ALA*     4.3     2.2    -      -       -      -
    315E  ILE*     4.2    22.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 133 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129E  ALA      3.0    14.1    +      -       -      -
    130E  CYS      3.6     2.9    -      -       -      -
    132E  LEU*     1.3    76.2    -      -       -      +
    134E  GLY*     1.3    56.7    +      -       -      +
    136E  ALA*     3.4     2.2    +      -       -      +
    137E  MET*     2.9    38.1    +      -       -      +
    166E  TRP*     5.0     0.2    -      -       -      -
    241E  HIS*     3.9    23.6    +      -       -      -
    269E  SER*     4.4     4.3    +      -       -      -
    287E  VAL*     4.8     0.4    -      -       -      -
    289E  TRP*     4.1    10.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 134 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130E  CYS      2.7    20.5    +      -       -      -
    133E  GLY*     1.3    70.6    -      -       -      +
    135E  MET*     1.3    60.9    +      -       -      +
    137E  MET*     3.3    17.5    +      -       -      +
    138E  LYS*     2.9    23.9    +      -       -      +
    166E  TRP*     4.2     2.7    -      -       -      -
    169E  PHE*     3.3    33.7    -      -       -      -
    203E  ILE*     4.0     0.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 135 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172D  TYR*     3.4    48.5    -      -       +      +
    131E  MET      2.7    20.5    +      -       -      +
    132E  LEU*     3.8    17.3    -      -       +      +
    134E  GLY*     1.3    69.8    -      -       -      +
    136E  ALA*     1.3    59.9    +      -       -      +
    138E  LYS*     2.9     9.2    +      -       -      +
    139E  TRP*     2.9    38.9    +      -       +      +
    169E  PHE*     3.6     1.5    -      -       -      -
    173E  TRP*     3.4    44.0    -      -       +      +
    299E  LEU*     4.0     7.4    -      -       +      -
    313E  PHE*     3.8    28.3    -      -       +      -
    315E  ILE*     4.1     7.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 136 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132E  LEU      3.0    16.5    +      -       -      +
    133E  GLY      3.8     2.5    -      -       -      +
    135E  MET*     1.3    73.4    -      -       -      +
    137E  MET*     1.3    67.0    +      -       -      +
    138E  LYS      3.2     0.3    +      -       -      -
    139E  TRP*     3.2     1.9    +      -       -      +
    140E  ARG*     3.0    36.7    +      -       -      +
    289E  TRP*     3.5    30.7    -      -       +      +
    295E  LEU*     4.3     2.0    -      -       +      -
    296E  PRO*     3.9    15.0    -      -       +      +
    299E  LEU*     3.7    13.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 137 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133E  GLY      2.9    22.4    +      -       -      +
    134E  GLY*     3.7    15.0    -      -       -      +
    136E  ALA*     1.3    75.5    -      -       -      +
    138E  LYS*     1.3    64.2    +      -       -      +
    140E  ARG*     3.3    28.8    +      -       -      +
    141E  TRP*     3.1    25.8    +      -       -      +
    157E  LEU*     3.5    26.7    -      -       +      -
    166E  TRP*     4.1     4.9    -      -       +      -
    203E  ILE*     3.6    19.9    -      -       +      +
    204E  GLY*     3.7    26.7    -      -       -      -
    206E  VAL*     4.0     6.5    -      -       +      -
    239E  ASP*     5.7     0.4    -      -       +      +
    240E  MET      4.8     1.1    -      -       -      -
    241E  HIS*     3.9    33.9    -      -       +      +
    269E  SER*     5.3     1.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 138 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172D  TYR      5.7     0.2    +      -       -      -
    174D  ASP*     4.1     8.1    +      -       -      -
    134E  GLY      2.9    14.6    +      -       -      +
    135E  MET*     2.9    11.4    +      -       -      +
    137E  MET*     1.3    78.8    -      -       -      +
    139E  TRP*     1.3    73.9    +      -       +      +
    141E  TRP*     3.5     8.7    +      -       +      +
    142E  ARG*     2.9    55.1    +      -       +      +
    152E  THR      5.8     0.9    -      -       -      -
    155E  PRO*     4.2    19.4    -      -       +      +
    169E  PHE*     4.9     1.1    -      -       +      -
    173E  TRP*     2.9    43.4    +      -       +      +
    174E  ASP*     5.0     3.2    +      -       -      +
    175E  VAL*     4.4    10.1    -      -       +      -
    203E  ILE*     4.2    14.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 139 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    171D  ARG*     3.3    34.5    -      -       +      +
    172D  TYR*     3.8    18.6    -      -       -      -
    174D  ASP*     3.8     5.2    -      -       -      -
    135E  MET*     2.9    35.2    +      -       +      +
    138E  LYS*     1.3    93.1    -      -       +      +
    140E  ARG*     1.3    65.9    +      -       -      +
    142E  ARG*     3.2    39.2    -      -       +      +
    143E  LYS*     2.9    32.1    +      -       +      +
    173E  TRP*     5.0     0.4    -      +       -      -
    296E  PRO*     3.6    23.6    -      -       +      -
    298E  GLU*     3.7    33.4    +      -       +      +
    299E  LEU*     3.6    29.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 140 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136E  ALA*     3.0    28.9    +      -       -      +
    137E  MET*     3.4    34.4    -      -       -      +
    139E  TRP*     1.3    77.8    -      -       -      +
    141E  TRP*     1.3    65.2    +      -       -      +
    143E  LYS*     3.5     7.3    +      -       -      +
    144E  ARG*     3.5    24.9    +      -       -      +
    203E  ILE      5.1     1.2    +      -       -      -
    239E  ASP*     4.3    22.3    +      -       -      +
    240E  MET      5.0     1.4    +      -       -      -
    268E  LYS*     3.6    31.4    -      -       -      +
    269E  SER*     4.7     4.4    +      -       -      -
    289E  TRP*     4.3     4.9    -      -       -      +
    293E  GLU      4.0     7.4    -      -       -      +
    294E  ALA*     2.8    46.4    +      -       -      +
    296E  PRO*     3.9    16.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 141 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137E  MET      3.1    17.4    +      -       -      +
    138E  LYS*     3.6     9.4    -      -       +      +
    140E  ARG*     1.3    78.3    -      -       -      +
    142E  ARG*     1.3    85.7    +      -       +      +
    144E  ARG*     3.4    17.6    +      -       -      +
    145E  MET*     3.2    42.1    +      -       +      +
    152E  THR*     3.6    40.8    -      -       +      -
    155E  PRO*     3.6    24.2    -      -       +      -
    200E  GLU      2.9    22.3    +      -       -      -
    201E  ASN*     3.5    36.7    -      -       -      -
    202E  THR      3.6    17.9    -      -       -      -
    203E  ILE*     3.6    24.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 142 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    174D  ASP*     2.8    43.8    +      -       -      -
    138E  LYS*     2.9    44.4    +      -       +      +
    139E  TRP*     3.2    45.0    +      -       +      +
    141E  TRP*     1.3    94.0    -      -       +      +
    143E  LYS*     1.3    56.8    +      -       -      +
    145E  MET*     3.2     3.6    +      -       -      +
    146E  GLU*     2.9    55.4    +      -       -      +
    152E  THR*     4.0    23.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 143 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    139E  TRP*     2.9    22.0    +      -       +      +
    140E  ARG*     3.8     6.5    -      -       -      +
    142E  ARG*     1.3    75.3    -      -       -      +
    144E  ARG*     1.3    58.7    +      -       +      +
    146E  GLU*     3.5    13.5    +      -       -      +
    147E  ALA*     3.0    27.0    +      -       -      +
    296E  PRO*     4.0    24.7    -      -       -      +
    297E  GLN      4.6     1.0    -      -       -      +
    298E  GLU*     2.8    43.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 144 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140E  ARG      3.5    12.7    +      -       -      +
    141E  TRP*     3.4    20.4    +      -       -      +
    142E  ARG      3.2     0.8    -      -       -      -
    143E  LYS*     1.3    78.2    -      -       +      +
    145E  MET*     1.3    74.9    +      -       -      +
    146E  GLU      3.2     0.2    -      -       -      -
    147E  ALA*     3.3     9.4    +      -       -      +
    148E  ALA*     3.2    20.8    +      -       -      +
    236E  ILE*     5.6     3.8    -      -       -      +
    237E  ASP*     3.8    31.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 145 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141E  TRP*     3.2    36.6    +      -       +      +
    144E  ARG*     1.3    86.6    -      -       +      +
    146E  GLU*     1.3    54.6    +      -       -      +
    148E  ALA*     3.4     3.7    +      -       -      +
    149E  GLY      3.3     4.3    +      -       -      -
    150E  LYS*     2.8    70.6    +      -       +      +
    151E  PRO*     3.9     9.0    -      -       +      +
    152E  THR*     3.7    17.9    -      -       +      -
    200E  GLU*     3.6    39.5    -      -       +      +
    201E  ASN*     3.8    16.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 146 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142E  ARG*     2.9    40.9    +      -       -      +
    143E  LYS*     3.6    15.4    +      -       -      +
    144E  ARG      3.2     0.2    -      -       -      -
    145E  MET*     1.3    76.2    -      -       -      +
    147E  ALA*     1.3    65.1    +      -       -      +
    148E  ALA      3.2     0.2    -      -       -      -
    149E  GLY*     3.2    12.2    +      -       -      +
    150E  LYS      4.6     4.0    -      -       -      +
    152E  THR*     4.3    12.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 147 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    143E  LYS      3.0    15.1    +      -       -      +
    144E  ARG*     3.4    14.1    -      -       -      +
    146E  GLU*     1.3    78.5    -      -       -      +
    148E  ALA*     1.3    55.6    +      -       +      +
    149E  GLY      3.3     3.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 148 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144E  ARG      3.2    12.0    +      -       -      +
    145E  MET*     3.4     6.0    +      -       -      +
    146E  GLU      3.2     0.8    -      -       -      -
    147E  ALA*     1.3    76.3    -      -       -      +
    149E  GLY*     1.3    62.5    +      -       -      +
    150E  LYS*     3.1    34.4    +      -       +      +
----------------------------------------------------------
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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