Contacts of the helix formed by residues 336 - 359 (chain N) in PDB entry 1OCR


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 PRO 336 (chain N).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    335N  SER*     1.3    86.5    -      -       -      +
    337N  ALA*     1.3    58.7    +      -       +      +
    339N  MET*     2.8    26.7    +      -       +      +
    340N  TRP*     3.0    22.5    +      -       +      -
    394N  VAL*     4.0    14.4    -      -       +      -
    405N  LEU*     6.5     0.2    -      -       +      -
    407N  ASP*     3.7    37.9    -      -       -      +
    410N  ALA*     3.7    36.1    -      -       +      +
    411N  LYS*     4.1    15.2    -      -       +      +
    414N  PHE*     6.0     0.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 337 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    257N  ILE*     3.7    12.4    -      -       +      +
    261N  TYR*     3.8    25.8    -      -       +      +
    335N  SER*     3.2     2.2    +      -       -      +
    336N  PRO*     1.3    81.1    -      -       -      +
    338N  MET*     1.3    61.9    +      -       -      +
    340N  TRP*     3.2     8.3    +      -       -      +
    341N  ALA      3.0    17.2    +      -       -      -
    391N  GLY*     3.6    15.7    -      -       -      +
    394N  VAL*     3.5    23.8    -      -       +      +
    395N  HIS*     3.9     8.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 338 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    257N  ILE*     4.2     6.2    -      -       -      +
    258N  VAL*     4.4    18.8    -      -       -      +
    261N  TYR*     3.8    18.8    -      -       +      +
    262N  SER*     4.0     9.6    -      -       -      +
    327N  LEU*     3.3    34.8    -      -       +      -
    332N  ILE*     4.3    20.4    -      -       +      -
    333N  LYS      3.6    17.9    -      -       -      +
    334N  TRP*     4.7     5.4    -      -       +      -
    335N  SER*     2.9    22.8    +      -       -      +
    337N  ALA*     1.3    76.3    -      -       -      +
    339N  MET*     1.3    59.4    +      -       -      +
    341N  ALA*     3.3     2.9    +      -       -      +
    342N  LEU*     3.0    46.2    +      -       +      +
     46O  LEU*     4.8     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 339 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    334N  TRP*     3.8    48.2    -      -       +      +
    335N  SER      3.0     9.8    +      -       -      +
    336N  PRO*     2.8    14.0    +      -       +      +
    338N  MET*     1.3    77.6    -      -       -      +
    340N  TRP*     1.3    59.5    +      -       -      +
    342N  LEU*     3.3     9.3    +      -       -      +
    343N  GLY      3.1    18.5    +      -       -      -
    411N  LYS*     3.9    37.2    -      -       +      +
    414N  PHE*     3.5    43.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 340 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    254N  ILE*     5.2     0.2    -      -       -      -
    336N  PRO*     3.0    33.6    +      -       +      +
    337N  ALA*     3.2     7.2    +      -       -      +
    339N  MET*     1.3    75.2    -      -       -      +
    341N  ALA*     1.3    57.9    +      -       -      +
    343N  GLY*     3.3     1.7    +      -       -      -
    344N  PHE*     2.9    28.8    +      -       -      +
    387N  PHE*     3.6    56.2    -      +       -      +
    390N  MET*     3.5    30.6    -      -       +      +
    391N  GLY*     3.6    28.9    -      -       -      +
    394N  VAL*     4.4    12.6    -      -       +      +
    410N  ALA*     4.9     2.6    +      -       -      +
    413N  HIS*     3.5    31.3    +      +       -      -
    414N  PHE*     3.7    32.5    -      +       +      +
    417N  MET*     3.9    26.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 341 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    254N  ILE*     3.9    22.8    -      -       +      +
    257N  ILE*     3.8    19.3    -      -       +      -
    258N  VAL*     4.0    19.7    -      -       +      -
    337N  ALA      3.0    12.7    +      -       -      +
    338N  MET*     3.6     8.7    -      -       -      +
    339N  MET      3.2     0.2    -      -       -      -
    340N  TRP*     1.3    75.4    -      -       -      +
    342N  LEU*     1.3    64.4    +      -       -      +
    344N  PHE*     3.4     2.1    +      -       -      +
    345N  ILE*     3.1    29.7    +      -       -      +
    391N  GLY*     5.4     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 342 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    258N  VAL*     5.5     0.9    -      -       +      -
    327N  LEU*     4.0    34.8    -      -       +      -
    334N  TRP*     3.8    22.2    -      -       +      -
    338N  MET*     3.0    35.5    +      -       +      +
    339N  MET*     3.3     6.3    +      -       -      +
    341N  ALA*     1.3    73.4    -      -       -      +
    343N  GLY*     1.3    67.5    +      -       -      +
    345N  ILE*     3.3    14.7    +      -       +      +
    346N  PHE*     3.2    19.9    +      -       -      +
     42O  ILE*     4.6    12.8    -      -       +      +
     46O  LEU*     3.7    33.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 343 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    339N  MET      3.1    14.4    +      -       -      -
    340N  TRP      3.7     3.1    -      -       -      -
    342N  LEU*     1.3    76.3    -      -       -      +
    344N  PHE*     1.3    62.3    +      -       -      +
    346N  PHE*     3.1     5.2    +      -       -      +
    347N  LEU*     2.9    31.0    +      -       -      +
    387N  PHE*     3.9    19.1    -      -       -      -
    414N  PHE*     4.8     3.3    -      -       -      -
    418N  PHE*     4.7    10.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 344 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    247N  ILE*     4.1     8.5    -      -       +      -
    250N  GLY      4.7     2.0    -      -       -      -
    251N  PHE*     3.8    27.6    -      +       -      -
    254N  ILE*     3.8    36.8    -      -       +      -
    323N  TRP*     3.7    26.2    -      +       -      -
    340N  TRP      2.9    14.6    +      -       -      +
    341N  ALA      3.5     7.2    -      -       -      +
    342N  LEU      3.3     0.2    -      -       -      -
    343N  GLY*     1.3    74.0    -      -       -      +
    345N  ILE*     1.3    70.5    +      -       +      +
    346N  PHE      3.0     0.2    +      -       -      -
    348N  PHE*     2.8    46.3    +      +       +      +
    383N  MET      4.0     9.9    -      -       -      -
    384N  GLY*     3.5    41.1    -      -       -      -
    387N  PHE*     3.8     6.7    -      -       +      -
    388N  ALA*     4.2     8.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 345 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    254N  ILE*     4.5     3.4    -      -       +      -
    258N  VAL*     4.3    16.4    -      -       +      -
    320N  VAL*     4.3    16.7    -      -       +      +
    323N  TRP*     4.0    38.6    -      -       +      -
    324N  LEU*     3.9    20.6    -      -       +      -
    327N  LEU*     4.8     3.4    -      -       +      -
    341N  ALA      3.1    16.2    +      -       -      +
    342N  LEU*     3.3    20.2    +      -       +      +
    344N  PHE*     1.3    85.1    -      -       +      +
    346N  PHE*     1.3    60.2    +      -       -      +
    348N  PHE*     4.3     1.8    -      -       -      +
    349N  THR*     2.8    26.3    +      -       -      -
     38O  VAL*     5.0     2.6    -      -       +      +
     42O  ILE*     3.9    17.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 346 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    342N  LEU      3.2     8.5    +      -       -      +
    343N  GLY*     3.1     7.6    +      -       -      +
    345N  ILE*     1.3    79.6    -      -       -      +
    347N  LEU*     1.3    78.5    +      -       +      +
    349N  THR*     2.9    23.3    +      -       -      -
    350N  VAL*     3.0    32.6    +      -       +      +
    418N  PHE*     5.5     6.5    -      +       -      -
     35O  SER*     3.9    26.2    -      -       -      -
     38O  VAL*     4.7    12.3    -      -       +      -
     39O  LEU*     4.0    39.9    -      -       +      -
     42O  ILE*     4.5     9.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 347 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    343N  GLY      2.9    17.9    +      -       -      +
    346N  PHE*     1.3    92.9    -      -       +      +
    348N  PHE*     1.3    61.5    +      -       -      +
    350N  VAL*     3.2     8.3    +      -       +      +
    351N  GLY*     2.9    20.3    +      -       -      -
    379N  TYR*     3.7    15.4    -      -       +      +
    383N  MET*     3.7    41.3    -      -       +      +
    387N  PHE*     3.4    38.6    -      -       +      -
    418N  PHE*     3.9    22.4    -      -       +      -
    422N  ASN*     4.5    12.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 348 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    247N  ILE*     4.2     8.7    -      -       +      -
    251N  PHE*     3.6    30.3    -      +       -      -
    316N  THR*     3.7    27.1    -      -       +      -
    320N  VAL*     4.5    15.5    -      -       +      -
    323N  TRP*     5.2     0.7    -      +       -      -
    344N  PHE*     2.8    50.4    +      +       +      +
    345N  ILE*     4.3     1.6    -      -       -      +
    347N  LEU*     1.3    73.6    -      -       -      +
    349N  THR*     1.3    63.3    +      -       -      +
    351N  GLY      3.3     0.5    +      -       -      -
    352N  GLY*     2.8    26.5    +      -       -      -
    379N  TYR      5.0     4.0    -      -       -      -
    380N  VAL*     4.2    22.4    -      -       +      +
    383N  MET      4.7     1.9    +      -       -      -
    384N  GLY*     5.0     2.7    -      -       -      -
    516N  HEA      4.1    40.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 349 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    320N  VAL*     4.0    22.7    -      -       -      +
    345N  ILE      2.8    17.7    +      -       -      -
    346N  PHE*     2.9    14.2    +      -       +      -
    348N  PHE*     1.3    84.0    -      -       -      +
    350N  VAL*     1.3    57.0    +      -       +      +
    352N  GLY*     3.3     0.5    +      -       -      -
    353N  LEU*     3.0    46.7    +      -       +      +
    516N  HEA      4.0    24.9    -      -       +      +
     34O  ILE*     4.8     0.9    -      -       +      -
     35O  SER*     4.9     5.2    -      -       -      -
     38O  VAL*     4.3    19.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 350 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    346N  PHE*     3.0    42.9    +      -       +      +
    347N  LEU*     3.2     8.0    +      -       -      +
    349N  THR*     1.3    76.2    -      -       -      +
    351N  GLY*     1.3    65.0    +      -       -      +
    352N  GLY      3.2     0.3    +      -       -      -
    353N  LEU*     3.2     8.8    +      -       -      +
    354N  THR*     3.1    23.5    +      -       -      +
    379N  TYR*     3.5    29.8    -      -       +      -
    426N  PHE*     5.9     3.4    -      -       +      -
    429N  HIS*     5.2    10.3    -      -       +      +
     35O  SER*     4.9    10.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 351 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    347N  LEU      2.9    11.9    +      -       -      -
    350N  VAL*     1.3    77.6    -      -       -      +
    352N  GLY*     1.3    59.4    +      -       -      +
    354N  THR*     3.4     6.4    -      -       -      +
    355N  GLY      3.2     4.0    +      -       -      -
    376N  HIS*     2.8    29.4    +      -       -      -
    379N  TYR*     3.5    26.0    -      -       -      +
    380N  VAL*     3.5    14.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 352 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    348N  PHE*     2.8    17.6    +      -       -      -
    349N  THR      3.8     0.2    -      -       -      -
    351N  GLY*     1.3    76.2    -      -       -      +
    353N  LEU*     1.3    63.3    +      -       -      +
    355N  GLY*     3.1    10.6    +      -       -      -
    356N  ILE*     3.3     7.8    +      -       -      +
    376N  HIS*     4.9     1.1    -      -       -      -
    380N  VAL*     3.8     5.8    -      -       -      +
    516N  HEA      3.6    45.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 353 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    349N  THR*     3.0    39.3    +      -       +      +
    350N  VAL*     3.2     6.0    +      -       -      +
    352N  GLY*     1.3    71.4    -      -       -      +
    354N  THR*     1.3    61.5    +      -       -      +
    355N  GLY      3.0     1.6    -      -       -      -
    356N  ILE*     2.8    27.1    +      -       +      +
    357N  VAL*     3.2    11.2    +      -       -      +
    516N  HEA      3.9    46.4    -      -       +      -
     30O  ILE*     6.5     0.2    -      -       +      -
     31O  VAL*     3.9    32.1    -      -       +      +
     34O  ILE*     4.0    20.0    -      -       +      -
     35O  SER*     4.1    19.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 354 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    350N  VAL*     3.1    15.2    +      -       -      +
    351N  GLY*     3.4     7.9    -      -       -      +
    353N  LEU*     1.3    79.8    -      -       -      +
    355N  GLY*     1.3    62.6    +      -       -      +
    357N  VAL*     3.2    16.8    +      -       -      +
    358N  LEU*     3.3    14.2    +      -       -      +
    372N  TYR*     3.5    25.4    +      -       +      +
    376N  HIS*     3.1    41.5    -      -       +      +
    429N  HIS*     3.6    21.5    +      -       -      +
     31O  VAL*     6.3     0.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 355 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    351N  GLY      3.2     2.4    +      -       -      -
    352N  GLY      3.1     7.4    +      -       -      -
    353N  LEU      3.0     1.2    -      -       -      -
    354N  THR*     1.3    81.0    -      -       -      +
    356N  ILE*     1.3    61.3    +      -       -      +
    357N  VAL      3.2     0.2    -      -       -      -
    358N  LEU*     3.5     3.7    +      -       -      +
    359N  ALA      3.1    15.8    +      -       -      -
    376N  HIS*     3.3    28.3    -      -       -      -
    516N  HEA      3.3    28.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 356 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    309N  THR      4.9     0.2    -      -       -      +
    310N  MET*     3.7    28.2    -      -       +      +
    313N  ALA*     3.9    22.9    -      -       +      +
    352N  GLY      3.3    12.8    +      -       -      +
    353N  LEU*     2.8    13.4    +      -       +      +
    355N  GLY*     1.3    74.7    -      -       -      +
    357N  VAL*     1.3    61.2    +      -       -      +
    359N  ALA*     3.2    10.7    +      -       -      +
    360N  ASN*     2.9    19.9    +      -       -      -
    516N  HEA      3.8    46.4    -      -       +      -
     27O  THR*     5.4     3.1    -      -       +      -
     73O  LEU*     4.6     4.3    -      -       +      -
     76O  ILE*     4.0    26.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 357 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    353N  LEU      3.2    11.9    +      -       -      +
    354N  THR*     3.3    10.5    -      -       -      +
    356N  ILE*     1.3    76.7    -      -       +      +
    358N  LEU*     1.3    60.9    +      -       -      +
    360N  ASN*     2.7    31.2    +      -       -      +
    363N  LEU*     4.0    18.3    -      -       +      +
    367N  LEU*     3.8    23.1    -      -       +      -
    372N  TYR*     3.7    23.6    -      -       +      +
     24O  HIS*     4.4    10.5    -      -       +      +
     27O  THR*     3.7    24.5    -      -       +      -
     28O  LEU*     5.6     3.8    -      -       +      +
     31O  VAL*     4.3    11.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 358 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    293N  PHE*     4.2     2.1    -      -       -      -
    354N  THR      3.3     9.6    +      -       -      +
    355N  GLY*     3.7     8.3    -      -       -      +
    356N  ILE      3.2     0.4    -      -       -      -
    357N  VAL*     1.3    77.9    -      -       -      +
    359N  ALA*     1.3    61.4    +      -       -      +
    360N  ASN      3.1     3.3    +      -       -      -
    364N  ASP*     3.7    29.2    -      -       -      +
    367N  LEU*     3.9    24.9    -      -       +      -
    372N  TYR*     3.6    25.1    -      -       +      -
    373N  VAL*     4.2    15.3    -      -       +      -
    376N  HIS*     3.9    40.4    -      -       +      -
    516N  HEA      3.4    37.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 359 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    293N  PHE*     3.6     6.1    -      -       -      -
    306N  THR*     2.8    29.2    -      -       -      +
    309N  THR*     3.8    26.5    -      -       +      -
    310N  MET*     4.0    20.6    -      -       +      -
    355N  GLY      3.1    11.8    +      -       -      +
    356N  ILE*     3.4    14.1    -      -       -      +
    357N  VAL      3.1     1.6    +      -       -      -
    358N  LEU*     1.3    75.9    -      -       -      +
    360N  ASN*     1.3    62.3    +      -       -      +
    361N  SER      3.1     1.0    +      -       -      -
    516N  HEA      3.4     9.4    -      -       +      -
----------------------------------------------------------
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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