Contacts of the helix formed by residues 272 - 295 (chain D) in PDB entry 1D2V


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

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

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with ASP 272 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    193D  GLN*     3.7    16.6    -      -       -      +
    270D  ARG      3.2     6.4    +      -       -      +
    271D  TRP*     1.3    73.8    -      -       -      +
    273D  GLY*     1.3    67.4    +      -       -      +
    274D  GLU*     3.7     9.0    +      -       -      +
    275D  ARG*     3.2    23.7    +      -       -      +
    276D  LEU*     3.0    23.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 273 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    188D  ARG*     4.3     3.6    -      -       -      -
    192D  ASN      5.5     0.7    -      -       -      -
    193D  GLN*     2.9    47.1    +      -       -      -
    195D  GLY*     3.3    15.7    -      -       -      -
    272D  ASP*     1.3    72.3    -      -       -      +
    274D  GLU*     1.3    63.0    +      -       -      +
    276D  LEU      3.1     2.1    +      -       -      -
    277D  TYR*     2.9    21.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 274 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7B  TYR*     6.3     0.4    -      -       +      -
    188D  ARG*     2.9    34.6    +      -       -      +
    190D  MET*     5.7     0.5    -      -       -      +
    193D  GLN*     4.7     0.4    +      -       -      -
    272D  ASP*     3.4    10.0    +      -       -      +
    273D  GLY*     1.3    74.6    -      -       -      +
    275D  ARG*     1.3    57.4    +      -       -      +
    277D  TYR*     3.5     1.7    +      -       -      +
    278D  GLN*     2.7    66.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 275 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6B  LYS*     5.2    13.1    -      -       -      +
      7B  TYR*     2.7    25.2    +      -       -      -
    271D  TRP*     3.1    50.6    -      -       +      +
    272D  ASP*     3.2    27.0    +      -       -      +
    274D  GLU*     1.3    79.4    -      -       -      +
    276D  LEU*     1.3    57.3    +      -       -      +
    278D  GLN*     3.4     3.4    +      -       -      +
    279D  GLU*     2.9    53.7    +      -       -      +
    577D  GLU*     3.0    26.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 276 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    193D  GLN      3.4    21.5    -      -       -      +
    194D  LEU*     3.6    22.4    -      -       -      +
    195D  GLY      4.4     1.3    -      -       -      -
    261D  ALA*     3.6    10.3    -      -       +      +
    264D  LEU*     3.7    17.1    -      -       +      +
    265D  LYS*     3.4    45.5    -      -       +      +
    271D  TRP*     3.8    24.7    -      -       +      +
    272D  ASP      3.0    20.6    +      -       -      +
    273D  GLY      3.1     6.0    +      -       -      +
    275D  ARG*     1.3    76.6    -      -       -      +
    277D  TYR*     1.3    56.3    -      -       -      +
    279D  GLU*     3.8     3.3    -      -       -      +
    280D  ALA*     2.9    34.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 277 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10B  ILE*     3.7    23.5    -      -       +      +
    177D  TYR*     3.5    36.4    +      +       -      +
    184D  ALA*     4.5     5.4    +      -       -      +
    188D  ARG*     3.3    69.6    -      -       +      +
    195D  GLY*     3.3    21.8    +      -       -      +
    196D  LEU      5.0     0.7    -      -       -      -
    197D  LEU*     4.2     5.6    -      -       +      -
    257D  HIS*     3.4    18.8    -      +       -      -
    273D  GLY      2.9     9.3    +      -       -      +
    274D  GLU      3.6     0.9    -      -       -      +
    276D  LEU*     1.3    75.8    -      -       -      +
    278D  GLN*     1.3    86.8    +      -       +      +
    281D  ARG*     2.7    39.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 278 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7B  TYR*     3.5    50.4    -      -       +      +
      8B  ARG      5.2     1.2    +      -       -      -
     10B  ILE*     6.1     1.0    -      -       -      +
    188D  ARG*     4.4     1.6    -      -       -      +
    274D  GLU*     2.7    48.0    +      -       +      +
    275D  ARG*     3.9     1.8    -      -       -      +
    277D  TYR*     1.3    97.4    -      -       -      +
    279D  GLU*     1.3    58.4    +      -       -      +
    281D  ARG*     3.2    32.7    +      -       -      +
    282D  LYS*     2.9    29.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 279 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7B  TYR*     2.6    31.8    +      -       -      +
    264D  LEU*     3.9    11.2    -      -       +      -
    271D  TRP*     3.5    34.7    -      -       +      -
    275D  ARG*     2.9    35.9    +      -       -      +
    276D  LEU      3.9     0.2    -      -       -      +
    278D  GLN*     1.3    75.7    -      -       -      +
    280D  ALA*     1.3    61.8    +      -       -      +
    282D  LYS*     3.4    15.1    +      -       -      +
    283D  ILE*     3.1    27.9    +      -       -      +
    524D  GLN*     5.0     1.9    +      -       -      -
    575D  TRP*     3.6    24.5    +      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 280 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    257D  HIS*     3.5    39.3    -      -       +      +
    260D  LEU*     4.1     7.4    -      -       +      +
    261D  ALA*     4.0    14.6    -      -       +      +
    264D  LEU*     3.7     8.4    -      -       +      +
    276D  LEU      2.9    18.3    +      -       -      +
    279D  GLU*     1.3    74.5    -      -       -      +
    281D  ARG*     1.4    65.1    +      -       -      +
    283D  ILE*     3.2     4.8    +      -       -      +
    284D  VAL*     3.1    27.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 281 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7B  TYR*     4.7     0.6    -      -       -      +
      8B  ARG*     2.8    45.2    +      -       -      +
      9B  THR      3.0    24.4    +      -       -      -
     10B  ILE*     3.5    29.2    +      -       -      +
    172D  ASP*     4.8    12.8    +      -       -      +
    177D  TYR*     3.3    44.2    -      -       +      +
    257D  HIS*     3.7     0.4    -      -       -      -
    277D  TYR*     2.7    40.7    +      -       -      +
    278D  GLN*     3.2    29.8    +      -       -      +
    280D  ALA*     1.4    72.3    -      -       -      +
    282D  LYS*     1.3    57.5    +      -       -      +
    284D  VAL*     3.6     1.9    +      -       -      +
    285D  GLY*     3.0    25.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 282 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6B  LYS      4.5    11.7    +      -       -      -
      7B  TYR*     4.1    22.5    -      -       +      -
    278D  GLN      2.9    17.6    +      -       -      +
    279D  GLU*     3.5    17.7    +      -       -      +
    280D  ALA      3.2     0.2    -      -       -      -
    281D  ARG*     1.3    76.0    -      -       -      +
    283D  ILE*     1.3    63.7    +      -       -      +
    285D  GLY*     4.0     1.1    -      -       -      -
    286D  ALA*     3.1    22.3    +      -       -      +
    512D  PHE*     6.1     4.0    -      -       -      -
    518D  GLY      5.1     0.6    +      -       -      -
    519D  VAL*     2.7    50.2    +      -       +      +
    520D  PHE*     3.6    23.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 283 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260D  LEU*     3.5    36.1    -      -       +      -
    264D  LEU*     4.6     8.5    -      -       +      -
    279D  GLU      3.1    14.1    +      -       -      +
    280D  ALA      3.2     7.1    +      -       -      +
    282D  LYS*     1.3    75.8    -      -       -      +
    284D  VAL*     1.4    52.8    +      -       -      +
    286D  ALA*     3.0     7.9    +      -       -      +
    287D  MET*     2.7    39.6    +      -       -      +
    520D  PHE*     4.6     4.7    -      -       +      -
    528D  LEU*     4.0    10.8    -      -       +      -
    570D  LEU*     3.8    17.9    -      -       +      -
    572D  LEU*     3.7    10.5    -      -       +      -
    575D  TRP*     3.5    45.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 284 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173D  ALA*     3.9    16.6    -      -       +      -
    176D  VAL*     4.7     6.7    -      -       +      -
    177D  TYR*     3.2    26.5    -      -       +      +
    253D  LEU*     4.5    24.9    -      -       +      +
    256D  GLU*     4.6     5.4    -      -       +      -
    257D  HIS*     4.1    17.0    -      -       +      +
    260D  LEU*     4.0    15.5    -      -       +      -
    280D  ALA      3.1    15.8    +      -       -      +
    281D  ARG      3.8     1.3    -      -       -      +
    283D  ILE*     1.4    71.6    -      -       -      +
    285D  GLY*     1.4    61.4    +      -       -      +
    287D  MET*     3.0    12.0    +      -       +      +
    288D  VAL*     2.8    29.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 285 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8B  ARG*     6.0     2.0    -      -       -      -
    171D  VAL      4.1     0.5    -      -       -      +
    172D  ASP*     4.2    13.9    -      -       -      -
    173D  ALA*     4.0    15.9    -      -       -      +
    281D  ARG      3.0    17.1    +      -       -      -
    282D  LYS*     4.0     2.0    -      -       -      -
    284D  VAL*     1.4    76.5    -      -       -      +
    286D  ALA*     1.3    60.8    +      -       -      +
    288D  VAL*     3.2     3.9    +      -       -      +
    289D  GLN*     2.9    31.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 286 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    282D  LYS      3.1    13.6    +      -       -      +
    283D  ILE      3.0     9.6    +      -       -      +
    285D  GLY*     1.3    73.5    -      -       -      +
    287D  MET*     1.3    52.5    +      -       -      +
    289D  GLN*     3.1    14.1    +      -       -      +
    290D  ILE*     2.7    41.6    +      -       +      +
    514D  TRP*     3.9     9.9    -      -       +      -
    520D  PHE*     3.8    11.4    -      -       +      -
    528D  LEU*     3.8    31.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 287 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    253D  LEU*     5.8     2.9    -      -       +      -
    256D  GLU*     3.2    42.4    -      -       -      +
    259D  ARG*     4.9     0.7    -      -       -      +
    260D  LEU*     4.4     0.2    -      -       -      -
    283D  ILE*     2.7    29.0    +      -       +      +
    284D  VAL*     3.0    12.8    +      -       +      +
    286D  ALA*     1.3    73.2    -      -       -      +
    288D  VAL*     1.3    57.9    +      -       +      +
    290D  ILE*     3.3     0.7    +      -       -      +
    291D  ILE*     2.8    38.6    +      -       +      +
    528D  LEU*     4.9     1.3    -      -       +      -
    531D  ILE*     3.6    48.7    -      -       +      -
    536D  ILE*     3.8    24.9    -      -       +      -
    570D  LEU*     3.9    19.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 288 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89B  TRP*     3.7    23.1    -      -       +      -
     93B  LEU*     4.6     4.3    -      -       +      -
     96B  ASP*     3.6    14.4    -      -       -      +
    171D  VAL*     3.5    20.4    -      -       +      -
    173D  ALA*     4.0    18.6    -      -       +      +
    175D  MET*     4.3     9.0    -      -       +      -
    253D  LEU*     4.2    25.4    -      -       +      -
    284D  VAL*     2.8    18.3    +      -       +      +
    285D  GLY*     3.6     8.1    -      -       -      +
    287D  MET*     1.3    76.1    -      -       -      +
    289D  GLN*     1.4    56.1    +      -       -      +
    292D  THR*     2.6    40.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 289 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8B  ARG*     3.3     9.2    -      -       -      +
    171D  VAL*     2.9    41.8    +      -       +      +
    285D  GLY      2.9    16.3    +      -       -      +
    286D  ALA*     3.5     6.8    -      -       -      +
    288D  VAL*     1.4    74.6    -      -       -      +
    290D  ILE*     1.3    59.7    +      -       -      +
    292D  THR*     3.4     1.2    +      -       -      -
    293D  TYR*     2.9    38.2    +      -       -      +
    510D  ASP*     3.2    24.0    +      -       -      -
    512D  PHE      4.4     0.6    -      -       -      +
    513D  TRP*     3.4    29.4    -      -       +      +
    514D  TRP*     3.0    39.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 290 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    286D  ALA*     2.7    27.0    +      -       +      +
    287D  MET      3.8     2.7    -      -       -      +
    289D  GLN*     1.3    70.1    -      -       -      +
    291D  ILE*     1.3    66.4    +      -       -      +
    293D  TYR*     5.5     0.4    -      -       -      -
    294D  ARG*     2.8    69.4    +      -       +      +
    514D  TRP*     3.6    40.4    -      -       +      +
    528D  LEU*     3.5    40.8    -      -       +      +
    529D  ALA*     4.9     0.9    -      -       -      -
    531D  ILE*     3.9    16.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 291 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89B  TRP*     3.5    43.3    -      -       +      -
    253D  LEU*     6.1     0.7    -      -       +      -
    287D  MET      2.8    23.5    +      -       -      +
    290D  ILE*     1.3    71.5    -      -       -      +
    292D  THR*     1.3    57.3    +      -       -      +
    294D  ARG*     5.2     0.4    -      -       -      +
    295D  ASP*     3.0    23.4    +      -       -      +
    296D  TYR*     3.0    23.6    +      -       -      -
    531D  ILE*     4.1    11.2    -      -       +      -
    532D  SER*     4.5     1.1    -      -       -      -
    533D  LEU*     3.8    40.8    -      -       +      +
    536D  ILE*     4.1    15.7    -      -       +      -
    552D  PHE*     3.7    22.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 292 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89B  TRP*     3.0    24.0    +      -       -      +
     93B  LEU*     3.4    38.2    -      -       +      +
    171D  VAL*     4.9     0.9    -      -       +      -
    288D  VAL      2.6    23.7    +      -       -      -
    289D  GLN*     3.6     4.0    -      -       -      -
    290D  ILE      3.2     0.2    -      -       -      -
    291D  ILE*     1.3    75.4    -      -       -      +
    293D  TYR*     1.3    79.4    +      -       +      +
    296D  TYR*     3.3     5.3    +      -       +      -
    297D  LEU*     2.7    44.6    +      -       +      +
    503D  PHE*     4.2     2.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 293 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    171D  VAL*     4.2    10.4    -      -       +      +
    289D  GLN*     2.9    24.8    +      -       -      +
    290D  ILE*     5.5     0.4    -      -       -      -
    292D  THR*     1.3    91.8    -      -       +      +
    294D  ARG*     1.3    63.5    +      -       -      +
    297D  LEU*     3.7    16.4    -      -       +      -
    298D  PRO*     3.4    17.9    -      -       -      +
    306D  MET*     4.1    13.0    -      -       +      +
    310D  LEU*     3.9    17.0    -      -       +      -
    503D  PHE*     2.6    50.8    +      +       -      -
    506D  LEU*     3.6    12.1    -      -       -      +
    507D  ARG*     3.7    23.1    +      -       +      -
    513D  TRP*     3.5    33.9    -      +       +      -
----------------------------------------------------------
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Residues in contact with ARG 294 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    290D  ILE*     2.8    41.8    +      -       +      +
    291D  ILE*     5.2     0.4    -      -       -      +
    293D  TYR*     1.3    77.7    -      -       -      +
    295D  ASP*     1.3    93.2    +      -       -      +
    298D  PRO*     3.5    15.6    -      -       -      +
    529D  ALA*     3.4    22.4    +      -       -      +
    531D  ILE*     2.8    30.7    +      -       -      +
    532D  SER*     3.9    12.5    -      -       -      +
    549D  ASN*     5.8     2.8    +      -       -      +
    550D  ASN*     4.6     1.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 295 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    291D  ILE*     3.0    24.9    +      -       -      +
    294D  ARG*     1.3   126.5    +      -       -      +
    296D  TYR*     1.3    65.6    +      -       -      +
    298D  PRO*     3.8     1.9    -      -       -      +
    299D  LEU*     3.7    12.3    -      -       -      +
    532D  SER*     5.3     1.2    -      -       -      -
    533D  LEU*     5.3     1.7    +      -       -      +
    549D  ASN*     5.9     2.8    -      -       -      +
    550D  ASN*     2.9    43.7    +      -       -      +
    551D  ILE*     5.6     3.4    -      -       +      +
    552D  PHE*     3.7    13.2    -      -       +      -
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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