Contacts of the helix formed by residues 334 - 361 (chain B) in PDB entry 3I5D


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 ASN 334 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49A  TYR*     5.6     1.7    +      -       -      -
     57B  TYR      3.2     5.8    +      -       -      +
     59B  ASP*     4.2    23.0    -      -       +      +
    333B  PHE*     1.3    88.1    -      -       -      +
    335B  ILE*     1.3    65.0    +      -       -      +
    336B  ILE*     3.7    11.6    +      -       -      +
    337B  PRO*     3.1    36.2    -      -       +      +
    338B  THR*     2.6    28.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 335 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45A  TYR*     5.1     2.2    -      -       -      +
    333B  PHE*     3.9    18.8    -      -       +      -
    334B  ASN*     1.3    76.4    +      -       -      +
    336B  ILE*     1.3    65.7    +      -       -      +
    338B  THR*     4.4     2.5    -      -       -      -
    339B  LEU*     3.0    44.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 336 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45A  TYR*     4.8     9.6    +      -       -      +
     49A  TYR*     5.6     8.7    -      -       +      +
     50A  VAL*     4.9    17.0    -      -       +      -
     54A  ASN*     6.0     2.9    -      -       +      -
    334B  ASN*     3.3    13.2    +      -       -      +
    335B  ILE*     1.3    80.4    -      -       -      +
    337B  PRO*     1.3    67.9    -      -       +      +
    339B  LEU*     4.3     2.1    -      -       -      +
    340B  LEU*     3.3    21.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 337 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56B  GLY      3.8    19.5    -      -       -      +
     57B  TYR      3.2    15.7    -      -       -      +
     58B  GLN      4.3    10.1    -      -       -      +
     59B  ASP*     4.7     2.0    -      -       +      +
    334B  ASN*     3.1    38.1    -      -       +      +
    336B  ILE*     1.3    96.3    -      -       +      +
    338B  THR*     1.3    61.6    +      -       -      +
    340B  LEU*     3.5     6.5    -      -       +      +
    341B  ASN*     3.0    25.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 338 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51B  CYS*     5.7     5.2    -      -       -      -
     57B  TYR*     3.1    31.1    -      -       +      +
    333B  PHE*     3.4    17.1    -      -       +      -
    334B  ASN      2.6    23.3    +      -       -      -
    335B  ILE*     3.4     4.4    +      -       -      -
    337B  PRO*     1.3    76.1    -      -       -      +
    339B  LEU*     1.3    64.4    +      -       +      +
    341B  ASN*     3.3     5.1    +      -       -      +
    342B  ILE*     2.9    52.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 339 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45A  TYR*     3.4    32.5    -      -       +      +
    344A  ALA*     4.9     2.6    -      -       -      +
    348A  LEU*     5.3    13.0    -      -       +      +
    335B  ILE*     3.0    30.1    +      -       +      +
    336B  ILE      4.3     2.0    -      -       -      +
    338B  THR*     1.3    79.5    -      -       +      +
    340B  LEU*     1.3    54.9    +      -       -      +
    342B  ILE*     3.8    14.8    -      -       +      +
    343B  GLY*     2.8    32.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 340 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    340A  LEU*     3.9    22.2    -      -       +      -
    341A  ASN*     3.5    35.0    -      -       +      +
    344A  ALA*     3.5    26.5    -      -       +      +
    336B  ILE      3.3    18.3    +      -       -      +
    337B  PRO*     3.5     9.0    -      -       +      +
    339B  LEU*     1.3    81.9    -      -       -      +
    341B  ASN*     1.3    66.4    +      -       +      +
    343B  GLY*     3.3     7.6    +      -       -      -
    344B  ALA*     3.3    11.0    +      -       +      +
    340C  LEU*     5.3    13.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 341 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46B  VAL*     4.5     9.1    -      -       -      +
     50B  VAL*     2.9    45.0    +      -       -      +
     51B  CYS*     3.9    12.5    -      -       -      -
     56B  GLY*     4.7    11.3    -      -       -      +
     57B  TYR*     6.3     0.2    -      -       -      -
    337B  PRO      3.0    15.2    +      -       -      +
    338B  THR*     3.9     3.8    -      -       -      +
    340B  LEU*     1.3    81.6    -      -       +      +
    342B  ILE*     1.3    66.3    +      -       +      +
    344B  ALA*     3.4     4.9    +      -       -      +
    345B  GLY*     3.1    18.0    +      -       -      -
    336C  ILE      5.4     1.0    -      -       -      +
    340C  LEU*     4.4    16.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 342 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46B  VAL*     5.5    14.5    -      -       +      +
     47B  ILE*     5.8    10.1    -      -       +      -
     51B  CYS*     5.8     6.1    -      -       -      -
    338B  THR*     2.9    42.2    +      -       +      +
    339B  LEU*     3.8    14.6    -      -       +      +
    341B  ASN*     1.3    75.3    -      -       +      +
    343B  GLY*     1.3    66.1    +      -       -      +
    345B  GLY*     3.0    12.3    +      -       -      +
    346B  LEU*     3.2    13.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 343 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    344A  ALA*     4.4    13.5    -      -       -      -
    347A  ALA*     3.3    31.4    -      -       -      +
    348A  LEU*     4.9     5.8    -      -       -      -
    339B  LEU      2.8    20.3    +      -       -      -
    340B  LEU      3.7     2.9    -      -       -      -
    341B  ASN      3.2     0.4    -      -       -      -
    342B  ILE*     1.3    74.6    -      -       -      +
    344B  ALA*     1.3    60.0    +      -       -      +
    346B  LEU*     3.3    11.7    +      -       -      +
    347B  ALA*     3.4     4.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 344 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    344A  ALA*     4.9     2.8    -      -       +      +
    340B  LEU*     3.3    12.2    +      -       +      +
    341B  ASN*     3.8     7.6    -      -       -      +
    342B  ILE      3.3     0.2    -      -       -      -
    343B  GLY*     1.3    74.6    -      -       -      +
    345B  GLY*     1.3    60.0    +      -       -      +
    347B  ALA*     3.4     2.0    +      -       -      +
    348B  LEU*     2.8    31.3    +      -       -      +
    339C  LEU      4.3     1.2    -      -       -      +
    340C  LEU*     3.5    42.0    -      -       +      +
    343C  GLY*     3.9    17.3    -      -       -      -
    344C  ALA*     4.5     2.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 345 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42B  VAL*     4.1    10.8    -      -       -      +
     46B  VAL*     3.8    30.3    -      -       -      -
    341B  ASN      3.1     6.5    +      -       -      -
    342B  ILE      3.0     9.3    +      -       -      -
    344B  ALA*     1.3    77.3    -      -       -      +
    346B  LEU*     1.3    56.0    +      -       -      +
    348B  LEU*     3.6     8.0    +      -       -      +
    349B  LEU*     3.2    24.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 346 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    347A  ALA*     4.6    14.1    -      -       +      +
    342B  ILE*     3.2    11.0    +      -       +      +
    343B  GLY*     3.4    11.0    -      -       -      +
    344B  ALA      3.2     0.2    -      -       -      -
    345B  GLY*     1.3    74.0    -      -       -      +
    347B  ALA*     1.3    64.8    +      -       -      +
    348B  LEU      3.1     1.3    -      -       -      -
    349B  LEU*     3.1    16.8    +      -       -      +
    350B  GLY*     3.4     8.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 347 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    347A  ALA*     4.9     7.8    -      -       +      +
    343B  GLY      3.4     9.4    +      -       -      +
    344B  ALA      3.4     2.0    +      -       -      +
    346B  LEU*     1.3    78.9    -      -       -      +
    348B  LEU*     1.3    60.9    +      -       -      +
    350B  GLY*     3.2    11.2    +      -       -      +
    351B  LEU      3.4     1.7    +      -       -      -
    343C  GLY*     2.9    36.8    -      -       -      +
    346C  LEU*     3.2    32.7    -      -       +      +
    347C  ALA*     4.6     3.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 348 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42B  VAL*     4.3     8.3    -      -       +      +
     45B  TYR*     6.2     3.6    -      -       +      -
    344B  ALA      2.8    19.6    +      -       -      +
    345B  GLY*     3.7     9.9    -      -       -      +
    347B  ALA*     1.3    75.5    -      -       -      +
    349B  LEU*     1.3    59.4    +      -       -      +
    350B  GLY      3.2     0.2    -      -       -      -
    351B  LEU*     3.6     6.3    +      -       -      +
    352B  VAL*     3.1    27.0    +      -       -      +
    339C  LEU*     5.1    22.0    -      -       +      +
    343C  GLY*     4.6     3.3    -      -       -      -
    346C  LEU*     5.3     0.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 349 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38B  THR*     5.6     0.4    -      -       -      -
     39B  GLN*     4.8    11.0    -      -       +      -
     42B  VAL*     3.5    34.3    -      -       +      +
    345B  GLY      3.2     7.5    +      -       -      +
    346B  LEU*     3.1    13.3    +      -       -      +
    348B  LEU*     1.3    73.9    -      -       -      +
    350B  GLY*     1.3    63.2    +      -       -      +
    352B  VAL*     3.7     2.7    -      -       -      +
    353B  ASN*     3.0    32.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 350 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    346B  LEU      3.4     5.3    +      -       -      -
    347B  ALA*     3.2     9.7    +      -       -      -
    349B  LEU*     1.3    80.0    -      -       -      +
    351B  LEU*     1.3    60.4    +      -       -      +
    353B  ASN*     3.6    20.2    +      -       -      +
    354B  VAL*     3.8     5.7    +      -       -      +
    346C  LEU*     5.1     2.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 351 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    347B  ALA      3.4     5.6    +      -       -      +
    348B  LEU*     4.2     7.2    -      -       -      +
    349B  LEU      3.4     0.2    -      -       -      -
    350B  GLY*     1.3    73.7    -      -       -      +
    352B  VAL*     1.3    59.1    +      -       -      +
    353B  ASN      3.2     0.4    -      -       -      -
    354B  VAL*     2.9    25.7    +      -       +      +
    355B  ILE*     3.0    12.5    +      -       -      +
    342C  ILE*     6.1     3.8    -      -       +      -
    346C  LEU*     4.0    21.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 352 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38B  THR*     3.9    25.8    -      -       +      +
     41B  LEU*     6.4     2.0    -      -       +      -
     42B  VAL*     4.2    11.0    -      -       +      -
    348B  LEU      3.1    18.8    +      -       -      +
    349B  LEU*     3.7    10.8    -      -       -      +
    350B  GLY      3.3     0.2    -      -       -      -
    351B  LEU*     1.3    72.7    -      -       -      +
    353B  ASN*     1.3    65.9    +      -       -      +
    355B  ILE*     3.2    20.0    +      -       +      +
    356B  CYS*     3.4     9.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 353 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35B  ASN*     4.0    25.6    +      -       +      +
     38B  THR*     2.8    30.3    +      -       -      -
     39B  GLN*     5.5     1.0    -      -       -      +
    349B  LEU*     3.0    16.3    +      -       -      +
    350B  GLY*     3.6    12.9    +      -       -      +
    351B  LEU      3.2     0.2    -      -       -      -
    352B  VAL*     1.3    77.1    -      -       -      +
    354B  VAL*     1.3    60.1    +      -       -      +
    356B  CYS*     3.8     3.7    +      -       -      +
    357B  ASP*     3.4    19.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 354 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    350B  GLY      3.8     2.6    +      -       -      +
    351B  LEU*     2.9    20.1    +      -       +      +
    353B  ASN*     1.3    77.4    -      -       -      +
    355B  ILE*     1.3    62.9    +      -       -      +
    357B  ASP*     3.5    10.5    -      -       +      +
    358B  TRP*     3.4    19.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 355 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    351B  LEU      3.0     9.8    +      -       -      +
    352B  VAL*     3.2    14.5    +      -       -      +
    354B  VAL*     1.3    76.5    -      -       -      +
    356B  CYS*     1.3    62.9    +      -       -      +
    357B  ASP      3.2     0.2    -      -       -      -
    358B  TRP*     3.6     5.6    +      -       -      +
    359B  ILE*     3.3    22.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with CYS 356 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     34B  LEU*     5.0    14.6    -      -       +      -
     37B  PHE*     5.4     5.8    -      -       -      -
     38B  THR*     3.3    32.8    -      -       +      -
    352B  VAL      3.4     7.1    +      -       -      +
    353B  ASN*     3.8     4.5    +      -       -      +
    355B  ILE*     1.3    78.3    -      -       -      +
    357B  ASP*     1.3    60.8    +      -       -      +
    359B  ILE*     3.6    10.1    -      -       +      +
    360B  VAL*     3.0    27.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 357 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    353B  ASN      3.4    14.4    +      -       -      +
    354B  VAL*     3.5    15.3    -      -       -      +
    355B  ILE      3.2     0.4    -      -       -      -
    356B  CYS*     1.3    78.9    -      -       -      +
    358B  TRP*     1.3    60.1    +      -       -      +
    360B  VAL*     3.2    20.0    +      -       -      +
    361B  LEU*     3.3     8.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 358 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    354B  VAL      3.4    12.0    +      -       -      +
    355B  ILE*     3.6     6.3    +      -       -      +
    356B  CYS      3.4     0.2    -      -       -      -
    357B  ASP*     1.3    76.0    -      -       -      +
    359B  ILE*     1.3    59.9    +      -       -      +
    361B  LEU*     3.1    18.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 359 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    355B  ILE      3.3    17.3    +      -       -      +
    356B  CYS*     3.6    12.3    -      -       +      +
    357B  ASP      3.2     0.4    -      -       -      -
    358B  TRP*     1.3    75.6    -      -       -      +
    360B  VAL*     1.3    61.5    +      -       -      +
    361B  LEU*     3.5     2.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 360 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    356B  CYS      3.0    14.5    +      -       -      +
    357B  ASP*     3.2    14.8    +      -       -      +
    359B  ILE*     1.3    75.6    -      -       -      +
    361B  LEU*     1.3    69.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 361 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    357B  ASP      3.3     8.4    +      -       -      +
    358B  TRP*     3.1    17.9    +      -       -      +
    359B  ILE      3.2     2.6    -      -       -      +
    360B  VAL*     1.3    85.8    -      -       -      +
----------------------------------------------------------
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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