Contacts of the helix formed by residues 364 - 388 (chain B) in PDB entry 5I4V


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 364 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    362B  SER      4.3     2.2    -      -       -      +
    363B  LEU*     1.3    93.1    -      -       +      +
    365B  LEU*     1.3    60.1    +      -       -      +
    366B  ASP*     4.5     3.8    -      -       +      +
    367B  ASP*     3.0    22.2    +      -       +      +
    368B  GLN*     2.9    25.8    +      -       -      +
    455B  SER*     3.8    19.1    -      -       -      +
    459B  GLU*     4.4    15.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 365 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    363B  LEU      3.5     2.0    +      -       -      -
    364B  PRO*     1.3    70.9    -      -       -      +
    366B  ASP*     1.3    68.3    +      -       -      +
    368B  GLN*     3.2    14.6    +      -       -      +
    369B  VAL*     3.0    29.1    +      -       +      +
    539B  HIS*     4.5    17.7    -      -       +      +
    542B  LEU*     3.3    42.0    -      -       +      +
    543B  GLN*     3.3    31.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 366 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    364B  PRO*     3.3     3.0    -      -       +      +
    365B  LEU*     1.3    79.0    -      -       -      +
    367B  ASP*     1.3    63.3    +      -       -      +
    369B  VAL*     3.4     9.7    -      -       -      +
    370B  ILE*     3.1    35.0    +      -       +      +
    539B  HIS*     4.2    17.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 367 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    363B  LEU*     4.7     9.9    -      -       +      +
    364B  PRO*     3.0    26.8    +      -       +      +
    366B  ASP*     1.3    78.6    -      -       -      +
    368B  GLN*     1.3    65.1    +      -       -      +
    369B  VAL      3.1     1.1    -      -       -      -
    370B  ILE*     3.1     9.8    +      -       -      +
    371B  LEU*     3.0    30.5    +      -       -      +
    453B  GLY      4.2     0.5    -      -       -      +
    454B  LEU*     3.7    19.6    -      -       +      +
    455B  SER*     2.7    48.8    +      -       -      -
    456B  ASN*     3.7     8.8    +      -       -      +
    459B  GLU*     5.5     0.9    -      -       -      +
    460B  VAL*     5.3     2.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 368 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    355B  LYS*     5.8     1.4    -      -       -      +
    360B  PHE*     3.5    52.2    -      -       +      +
    361B  SER*     2.8    28.7    +      -       -      +
    363B  LEU*     2.6    29.9    +      -       +      +
    364B  PRO      2.9    14.0    +      -       -      +
    365B  LEU*     3.2    14.0    +      -       -      +
    367B  ASP*     1.3    74.9    -      -       -      +
    369B  VAL*     1.3    61.1    +      -       -      +
    371B  LEU*     3.6     1.0    +      -       -      +
    372B  LEU*     3.3    21.5    +      -       -      +
    542B  LEU*     3.9    32.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 369 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    365B  LEU*     3.0    27.2    +      -       +      +
    366B  ASP*     3.4    10.8    -      -       -      +
    367B  ASP      3.1     0.2    -      -       -      -
    368B  GLN*     1.3    77.2    -      -       -      +
    370B  ILE*     1.3    66.9    +      -       +      +
    372B  LEU*     3.2     3.8    +      -       -      +
    373B  ARG*     3.0    35.1    +      -       -      +
    538B  LEU*     3.8    31.1    -      -       +      +
    539B  HIS*     4.0    34.1    -      -       +      +
    542B  LEU*     4.5     7.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 370 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    366B  ASP*     3.1    22.2    +      -       +      +
    367B  ASP*     3.1    18.5    +      -       -      +
    369B  VAL*     1.3    78.9    -      -       +      +
    371B  LEU*     1.3    59.1    +      -       -      +
    373B  ARG*     3.4     7.5    +      -       -      +
    374B  ALA*     3.0    27.5    +      -       +      +
    451B  ALA*     4.0    18.2    -      -       +      -
    452B  LYS      3.4    21.3    -      -       -      +
    453B  GLY*     3.1    31.9    -      -       -      +
    454B  LEU*     4.0    10.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 371 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    360B  PHE*     4.1    12.3    -      -       +      -
    363B  LEU*     3.8    28.0    -      -       +      -
    367B  ASP      3.0    18.7    +      -       -      +
    368B  GLN      4.0     4.0    -      -       -      +
    370B  ILE*     1.3    76.7    -      -       -      +
    372B  LEU*     1.3    56.3    +      -       -      +
    374B  ALA*     3.4     4.1    +      -       -      +
    375B  GLY*     2.9    27.2    +      -       -      -
    446B  LEU*     3.6    36.0    -      -       +      +
    447B  PHE*     4.4    11.4    -      -       +      -
    448B  ASN*     3.5    29.7    -      -       +      +
    451B  ALA*     4.4     4.9    -      -       +      -
    454B  LEU*     4.1    16.2    -      -       +      -
    460B  VAL*     4.2    10.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 372 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    350B  LEU*     3.9    34.1    -      -       +      +
    351B  VAL*     4.5     9.9    -      -       +      -
    354B  ALA*     4.1    17.7    -      -       +      -
    360B  PHE*     3.9    15.3    -      -       +      -
    368B  GLN      3.3    16.5    +      -       -      +
    369B  VAL      3.2     4.4    +      -       -      +
    371B  LEU*     1.3    76.9    -      -       -      +
    373B  ARG*     1.3    62.0    +      -       -      +
    375B  GLY      4.5     0.2    -      -       -      +
    376B  TRP*     3.0    36.5    +      -       -      +
    379B  LEU*     4.5     3.6    -      -       +      -
    446B  LEU*     4.4    11.2    -      -       +      -
    525B  MET*     4.2     6.0    -      -       +      +
    538B  LEU*     4.2    21.3    -      -       +      -
    542B  LEU*     3.8    25.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 373 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    369B  VAL*     3.0    33.0    +      -       -      +
    370B  ILE*     3.7     7.0    -      -       -      +
    371B  LEU      3.3     0.2    -      -       -      -
    372B  LEU*     1.3    77.4    -      -       -      +
    374B  ALA*     1.3    57.8    +      -       -      +
    376B  TRP*     3.1    25.5    +      -       -      -
    524B  GLU*     3.1    29.3    +      -       -      +
    525B  MET*     3.8    27.6    +      -       -      +
    527B  GLU*     2.9    23.4    +      -       -      -
    528B  ALA*     3.2    19.4    +      -       -      +
    538B  LEU*     4.3     6.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 374 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    370B  ILE*     3.0    18.1    +      -       +      +
    371B  LEU      3.8     3.8    -      -       -      +
    373B  ARG*     1.3    78.9    -      -       -      +
    375B  GLY*     1.3    58.4    +      -       -      +
    377B  ASN*     5.0     4.0    +      -       -      +
    378B  GLU*     3.9    11.4    -      -       -      +
    448B  ASN*     4.7    13.3    +      -       +      +
    451B  ALA*     3.9    24.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 375 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    371B  LEU      2.9    14.8    +      -       -      -
    374B  ALA*     1.3    79.1    -      -       -      +
    376B  TRP*     1.3    66.8    +      -       -      +
    377B  ASN      2.9     4.4    +      -       -      -
    378B  GLU*     3.1    13.0    +      -       -      +
    379B  LEU*     3.0    33.5    +      -       -      +
    445B  ILE*     4.6    12.1    -      -       -      -
    446B  LEU*     5.7     1.1    -      -       -      -
    448B  ASN*     6.3     1.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 376 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    343B  ALA*     5.3     2.5    -      -       +      -
    347B  LEU*     3.9    23.8    -      -       +      -
    350B  LEU*     3.7    26.5    -      -       +      -
    372B  LEU      3.0    18.4    +      -       -      +
    373B  ARG*     3.1    32.5    +      -       -      +
    374B  ALA      5.0     0.2    -      -       -      -
    375B  GLY*     1.3    75.7    -      -       -      +
    377B  ASN*     1.3    90.7    +      -       +      +
    379B  LEU*     3.7     2.1    -      -       -      +
    380B  LEU*     3.0    43.2    +      -       +      +
    504B  LEU*     4.3    13.4    -      -       +      +
    507B  LEU*     3.9    22.2    -      -       +      -
    522B  LEU*     3.7    26.9    -      -       +      -
    525B  MET*     3.6    31.8    +      -       +      +
    526B  LEU*     3.9    19.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 377 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    374B  ALA      5.4     3.1    -      -       -      +
    375B  GLY      2.9     2.3    +      -       -      -
    376B  TRP*     1.3   106.3    -      -       +      +
    378B  GLU*     1.3    65.3    +      -       +      +
    380B  LEU*     3.2     2.6    +      -       -      +
    381B  ILE*     3.2    35.7    +      -       -      +
    500B  GLY*     2.6    44.3    +      -       -      -
    503B  CYS*     4.4     2.9    -      -       -      +
    504B  LEU*     4.1    18.3    -      -       +      +
    507B  LEU*     4.1    18.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 378 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    426A  VAL*     5.3     0.3    -      -       -      +
    374B  ALA      3.9    17.7    -      -       -      +
    375B  GLY*     3.1     6.9    +      -       -      +
    377B  ASN*     1.3    80.3    -      -       -      +
    379B  LEU*     1.3    62.9    +      -       -      +
    381B  ILE*     3.4     9.2    +      -       -      +
    382B  ALA*     3.0    24.8    +      -       -      +
    445B  ILE*     3.9    24.8    -      -       +      +
    493B  LEU      5.5     0.2    -      -       -      +
    496B  LEU*     4.0    37.1    -      -       +      +
    497B  ARG*     2.7    49.9    +      -       -      +
    500B  GLY*     4.6     9.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 379 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    350B  LEU*     3.8    34.3    -      -       +      -
    353B  TRP*     4.0    15.3    -      -       +      -
    372B  LEU*     4.5     4.3    -      -       +      -
    375B  GLY*     3.0    30.9    +      -       -      +
    376B  TRP*     3.7     4.0    -      -       -      +
    378B  GLU*     1.3    77.4    -      -       -      +
    380B  LEU*     1.3    61.4    +      -       -      +
    382B  ALA*     3.4     2.9    +      -       -      +
    383B  SER      3.2    16.6    +      -       -      -
    442B  ARG*     3.2    59.7    +      -       +      +
    445B  ILE*     4.0    13.9    -      -       +      -
    446B  LEU*     4.1    18.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 380 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    343B  ALA*     4.2    30.1    -      -       +      +
    346B  GLN*     3.8    32.5    -      -       +      +
    347B  LEU*     4.4     7.2    -      -       +      -
    350B  LEU*     4.5    19.7    -      -       +      -
    376B  TRP*     3.0    43.8    +      -       +      +
    377B  ASN*     3.8     3.4    -      -       -      +
    379B  LEU*     1.3    74.8    -      -       -      +
    381B  ILE*     1.3    68.0    +      -       +      +
    383B  SER*     3.3    10.9    +      -       -      +
    384B  PHE*     3.0    32.2    +      -       +      +
    442B  ARG*     5.0     1.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 381 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    377B  ASN*     3.2    42.9    +      -       -      +
    378B  GLU*     3.7     7.6    -      -       -      +
    380B  LEU*     1.3    77.9    -      -       +      +
    382B  ALA*     1.3    58.5    +      -       -      +
    384B  PHE*     3.5    27.1    -      -       +      -
    385B  SER*     2.8    36.4    +      -       -      +
    420B  VAL*     4.9     3.4    -      -       +      -
    424B  LEU*     3.7    26.7    -      -       +      -
    496B  LEU*     3.7     8.5    -      -       +      -
    499B  ILE*     4.4     6.5    -      -       +      -
    500B  GLY*     4.0    17.0    -      -       -      +
    503B  CYS*     4.0    19.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 382 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    378B  GLU      3.0    17.7    +      -       -      +
    379B  LEU      3.7     4.3    -      -       -      +
    380B  LEU      3.2     0.2    -      -       -      -
    381B  ILE*     1.3    79.8    -      -       -      +
    383B  SER*     1.3    62.9    +      -       -      +
    385B  SER*     3.4     5.1    +      -       -      -
    386B  HIS*     3.2    24.4    +      -       -      +
    424B  LEU*     5.7     1.6    -      -       -      -
    428B  MET*     3.7     9.7    -      -       +      +
    438B  LEU*     3.9     9.5    -      -       +      +
    441B  LEU*     6.5     0.4    -      -       +      -
    442B  ARG*     4.2    19.7    -      -       +      -
    445B  ILE*     4.9     2.2    -      -       +      -
    496B  LEU*     4.3    15.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 383 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    308B  GLU*     5.4     1.3    -      -       -      -
    346B  GLN*     4.7     6.6    +      -       -      +
    379B  LEU      3.2    11.5    +      -       -      -
    380B  LEU*     3.3    14.6    +      -       -      +
    382B  ALA*     1.3    81.4    -      -       -      +
    384B  PHE*     1.3    59.5    +      -       -      +
    386B  HIS*     3.8     2.4    -      -       -      +
    387B  ARG*     3.0    43.7    +      -       -      +
    438B  LEU*     4.7    10.8    -      -       -      +
    442B  ARG*     3.9    22.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 384 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    339B  ILE*     6.1     5.2    -      -       +      -
    380B  LEU*     3.0    22.9    +      -       +      +
    381B  ILE*     3.5    39.9    -      -       +      -
    383B  SER*     1.3    79.3    +      -       -      +
    385B  SER*     1.3    67.7    +      -       -      +
    387B  ARG*     3.1    31.7    +      -       -      +
    388B  SER*     2.5    35.3    +      -       -      -
    395B  ILE*     3.6    34.5    -      -       +      -
    396B  LEU      4.1     5.8    -      -       -      +
    397B  LEU*     5.3     7.0    -      -       +      -
    420B  VAL*     4.2    17.7    -      -       +      -
    503B  CYS*     6.0     2.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 385 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    381B  ILE*     2.8    23.9    +      -       -      +
    382B  ALA*     3.7     4.9    -      -       -      -
    383B  SER      3.3     0.2    -      -       -      -
    384B  PHE*     1.3    79.8    -      -       -      +
    386B  HIS*     1.3    63.2    +      -       -      +
    388B  SER*     3.0    12.1    +      -       -      -
    389B  ILE*     3.7     4.5    +      -       -      +
    420B  VAL*     3.7    12.0    -      -       -      +
    424B  LEU*     3.5    30.7    -      -       -      +
    425B  VAL*     3.5    25.2    -      -       -      +
    428B  MET*     3.8    17.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 386 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    382B  ALA      3.2    14.0    +      -       -      +
    383B  SER      3.8     1.8    -      -       -      +
    385B  SER*     1.3    79.0    -      -       -      +
    387B  ARG*     1.3    61.5    +      -       -      +
    389B  ILE*     3.2    35.9    +      -       +      +
    428B  MET*     3.6    10.2    -      -       +      -
    433B  MET*     2.9    41.7    +      -       +      -
    434B  ASP*     3.8     9.4    +      -       -      -
    435B  LYS*     3.6    40.0    +      -       +      -
    438B  LEU*     3.6    33.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 387 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    346B  GLN*     3.6    24.7    -      -       -      +
    383B  SER*     3.0    30.5    +      -       -      +
    384B  PHE*     3.1    32.1    -      -       -      +
    386B  HIS*     1.3    78.8    +      -       -      +
    388B  SER*     1.3    55.7    -      -       -      +
    389B  ILE      3.3     3.9    +      -       -      -
    390B  ASP*     4.6     7.1    +      -       -      +
    391B  VAL*     5.1     1.0    -      -       -      +
    396B  LEU*     3.1    39.1    +      -       +      +
    397B  LEU*     4.0     5.5    -      -       -      +
    398B  ALA*     3.3    30.2    -      -       -      +
    435B  LYS*     5.7     3.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 388 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    384B  PHE      2.5    23.2    +      -       -      -
    385B  SER      3.0     9.4    +      -       -      -
    387B  ARG*     1.3    75.6    -      -       -      +
    389B  ILE*     1.3    62.7    +      -       -      +
    390B  ASP      3.1     4.0    +      -       -      -
    391B  VAL*     3.1    24.3    +      -       -      +
    394B  GLY      3.9     5.0    -      -       -      +
    395B  ILE*     3.3    26.1    -      -       -      +
    396B  LEU      3.0    18.4    +      -       -      +
    425B  VAL*     3.6    17.3    -      -       -      +
----------------------------------------------------------
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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