Contacts of the helix formed by residues 364 - 388 (chain F) 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 F).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    362F  SER      4.3     2.0    -      -       -      +
    363F  LEU*     1.3    98.8    -      -       +      +
    365F  LEU*     1.3    61.2    +      -       -      +
    366F  ASP*     4.5     4.0    -      -       +      +
    367F  ASP*     3.0    22.4    +      -       +      +
    368F  GLN*     2.9    25.1    +      -       -      +
    455F  SER*     3.8    19.3    -      -       -      +
    459F  GLU*     4.4    12.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 365 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    363F  LEU      3.5     1.8    +      -       -      -
    364F  PRO*     1.3    70.3    -      -       -      +
    366F  ASP*     1.3    64.2    -      -       -      +
    368F  GLN*     3.2    13.8    +      -       -      +
    369F  VAL*     3.1    29.0    +      -       +      +
    539F  HIS*     4.1    27.4    -      -       +      +
    542F  LEU*     3.8    42.2    -      -       +      +
    543F  GLN*     3.8    17.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 366 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    364F  PRO*     3.3     3.5    -      -       +      +
    365F  LEU*     1.3    78.1    -      -       -      +
    367F  ASP*     1.3    63.3    +      -       -      +
    369F  VAL*     3.4     8.7    -      -       -      +
    370F  ILE*     3.1    34.3    +      -       +      +
    539F  HIS*     4.6    15.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 367 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    363F  LEU*     4.7     9.3    -      -       +      +
    364F  PRO*     3.0    27.1    +      -       +      +
    366F  ASP*     1.3    79.3    -      -       -      +
    368F  GLN*     1.3    64.7    +      -       -      +
    369F  VAL      3.1     1.3    -      -       -      -
    370F  ILE*     3.1     9.7    +      -       -      +
    371F  LEU*     3.0    30.5    +      -       +      +
    453F  GLY      4.3     0.2    -      -       -      +
    454F  LEU*     3.7    19.3    -      -       +      +
    455F  SER*     2.7    48.4    +      -       -      -
    456F  ASN*     3.7     9.2    +      -       -      +
    459F  GLU*     5.6     0.5    -      -       -      +
    460F  VAL*     5.3     3.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 368 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    355F  LYS*     5.9     1.2    -      -       -      +
    360F  PHE*     3.4    51.1    -      -       +      +
    361F  SER*     2.8    29.6    +      -       -      +
    363F  LEU*     2.6    29.9    +      -       +      +
    364F  PRO      2.9    13.9    +      -       -      +
    365F  LEU*     3.5    13.7    -      -       -      +
    367F  ASP*     1.3    76.7    -      -       -      +
    369F  VAL*     1.3    61.8    +      -       -      +
    371F  LEU*     3.7     1.2    +      -       -      +
    372F  LEU*     3.3    22.6    +      -       -      +
    542F  LEU*     3.8    28.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 369 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    365F  LEU*     3.1    20.1    +      -       +      +
    366F  ASP*     3.4    11.0    -      -       -      +
    368F  GLN*     1.3    76.5    -      -       -      +
    370F  ILE*     1.3    65.9    +      -       +      +
    372F  LEU*     3.3     3.8    +      -       -      +
    373F  ARG*     3.0    28.3    +      -       -      +
    535F  HIS*     4.7    20.0    -      -       +      +
    538F  LEU*     3.8    21.1    -      -       +      +
    539F  HIS*     3.9    28.5    -      -       +      +
    542F  LEU*     3.6    22.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 370 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    366F  ASP*     3.1    22.7    +      -       +      +
    367F  ASP*     3.1    17.2    +      -       -      +
    369F  VAL*     1.3    80.1    -      -       +      +
    371F  LEU*     1.3    58.4    +      -       -      +
    373F  ARG*     3.4     8.0    +      -       -      +
    374F  ALA*     3.0    26.9    +      -       +      +
    451F  ALA*     4.0    18.4    -      -       +      -
    452F  LYS      3.3    20.9    -      -       -      +
    453F  GLY*     3.1    31.9    -      -       -      +
    454F  LEU*     4.0    11.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 371 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    360F  PHE*     4.1    11.2    -      -       +      -
    363F  LEU*     3.9    28.9    -      -       +      -
    367F  ASP      3.0    19.1    +      -       -      +
    368F  GLN      4.0     3.6    -      -       -      +
    370F  ILE*     1.3    77.3    -      -       -      +
    372F  LEU*     1.3    57.2    +      -       -      +
    374F  ALA*     3.3     4.3    +      -       -      +
    375F  GLY*     2.9    26.7    +      -       -      -
    446F  LEU*     3.6    34.6    -      -       +      +
    447F  PHE*     4.3    11.2    -      -       +      -
    448F  ASN*     3.5    30.2    -      -       +      +
    451F  ALA*     4.4     4.9    -      -       +      -
    454F  LEU*     4.1    15.3    -      -       +      -
    460F  VAL*     4.2    10.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 372 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    350F  LEU*     3.9    34.3    -      -       +      +
    351F  VAL*     4.5     9.6    -      -       +      +
    354F  ALA*     4.1    17.5    -      -       +      -
    360F  PHE*     3.9    19.7    -      -       +      -
    368F  GLN      3.3    16.0    +      -       -      +
    369F  VAL      3.3     4.3    +      -       -      +
    371F  LEU*     1.3    76.8    -      -       -      +
    373F  ARG*     1.3    60.5    +      -       -      +
    375F  GLY*     5.1     0.2    -      -       -      -
    376F  TRP*     3.0    37.0    +      -       +      +
    379F  LEU*     4.5     3.6    -      -       +      -
    446F  LEU*     4.4    10.8    -      -       +      -
    525F  MET*     4.8     2.9    -      -       -      +
    538F  LEU*     4.2    21.8    -      -       +      -
    542F  LEU*     4.0    20.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 373 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    369F  VAL*     3.0    23.8    +      -       -      +
    370F  ILE*     3.8     7.4    -      -       -      +
    372F  LEU*     1.3    79.1    -      -       -      +
    374F  ALA*     1.3    57.9    +      -       -      +
    376F  TRP*     3.1    24.6    +      -       -      -
    525F  MET*     4.1    29.4    +      -       -      +
    527F  GLU      2.7    29.3    +      -       -      -
    528F  ALA*     3.8    18.8    +      -       -      +
    535F  HIS*     3.3    43.9    +      -       -      -
    538F  LEU*     4.9     2.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 374 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    370F  ILE*     3.0    17.2    +      -       +      +
    371F  LEU*     3.8     3.8    -      -       -      +
    372F  LEU      3.3     0.2    -      -       -      -
    373F  ARG*     1.3    76.2    -      -       -      +
    375F  GLY*     1.3    59.6    +      -       -      +
    376F  TRP*     3.8     0.6    -      -       -      -
    377F  ASN*     5.0     3.6    +      -       -      +
    378F  GLU*     3.9    11.1    -      -       -      +
    448F  ASN*     4.8    13.5    +      -       +      +
    451F  ALA*     3.8    24.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 375 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    371F  LEU      2.9    15.4    +      -       -      -
    374F  ALA*     1.3    78.4    -      -       -      +
    376F  TRP*     1.3    66.0    +      -       -      +
    377F  ASN      2.9     5.0    +      -       -      -
    378F  GLU*     3.1    12.0    +      -       -      +
    379F  LEU*     3.0    33.0    +      -       -      +
    445F  ILE*     4.6    12.6    -      -       -      -
    446F  LEU*     5.7     0.7    -      -       -      -
    448F  ASN*     6.3     0.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 376 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    343F  ALA*     5.3     2.7    -      -       +      -
    347F  LEU*     3.9    23.6    -      -       +      -
    350F  LEU*     3.7    26.9    -      -       +      -
    372F  LEU      3.0    19.5    +      -       -      +
    373F  ARG*     3.1    32.7    +      -       -      -
    375F  GLY*     1.3    74.9    -      -       -      +
    377F  ASN*     1.3    89.2    +      -       +      +
    379F  LEU*     3.6     3.1    -      -       -      +
    380F  LEU*     3.0    42.7    +      -       +      +
    504F  LEU*     4.3    18.8    -      -       +      +
    507F  LEU*     3.9    21.3    -      -       +      -
    522F  LEU*     3.7    27.4    -      -       +      -
    525F  MET*     3.6    36.6    +      -       +      +
    526F  LEU*     4.6     8.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 377 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    374F  ALA      5.0     3.6    +      -       -      +
    375F  GLY      2.9     2.5    +      -       -      -
    376F  TRP*     1.3   104.5    -      -       +      +
    378F  GLU*     1.3    67.5    +      -       +      +
    380F  LEU*     3.2     2.1    +      -       -      +
    381F  ILE*     3.2    35.1    +      -       -      +
    500F  GLY*     2.7    44.5    +      -       -      -
    503F  CYS*     4.3     3.1    -      -       -      +
    504F  LEU*     4.1    19.7    -      -       +      +
    507F  LEU*     4.1    17.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 378 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    426E  VAL*     5.3     0.3    -      -       -      +
    374F  ALA      3.9    17.2    -      -       -      +
    375F  GLY*     3.1     6.6    +      -       -      +
    377F  ASN*     1.3    80.8    +      -       -      +
    379F  LEU*     1.3    62.4    +      -       -      +
    381F  ILE*     3.3     9.4    +      -       -      +
    382F  ALA*     3.0    24.6    +      -       -      +
    445F  ILE*     3.9    24.4    -      -       +      +
    493F  LEU      5.5     0.2    -      -       -      +
    496F  LEU*     4.0    34.5    -      -       +      +
    497F  ARG*     2.7    47.3    +      -       -      +
    500F  GLY*     4.6    10.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 379 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    350F  LEU*     3.8    34.1    -      -       +      -
    353F  TRP*     4.0    15.3    -      -       +      -
    371F  LEU      5.6     0.2    -      -       -      +
    372F  LEU*     4.5     4.0    -      -       +      -
    375F  GLY*     3.0    30.2    +      -       -      +
    376F  TRP      3.6     4.5    -      -       -      +
    378F  GLU*     1.3    77.0    -      -       -      +
    380F  LEU*     1.3    62.0    +      -       -      +
    382F  ALA*     3.4     3.3    +      -       -      +
    383F  SER      3.2    16.8    +      -       -      -
    442F  ARG*     3.2    60.5    +      -       +      +
    445F  ILE*     4.0    13.5    -      -       +      -
    446F  LEU*     4.1    17.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 380 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    343F  ALA*     4.2    29.8    -      -       +      +
    346F  GLN*     3.8    31.4    -      -       +      +
    347F  LEU*     4.3     6.7    -      -       +      -
    350F  LEU*     4.5    19.3    -      -       +      -
    376F  TRP*     3.0    42.9    +      -       +      +
    377F  ASN*     3.8     3.6    -      -       -      +
    379F  LEU*     1.3    73.8    -      -       -      +
    381F  ILE*     1.3    68.2    +      -       +      +
    383F  SER*     3.3    10.6    +      -       -      +
    384F  PHE*     3.0    32.8    +      -       +      +
    442F  ARG*     5.0     1.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 381 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    377F  ASN*     3.2    42.7    +      -       -      +
    378F  GLU*     3.7     7.4    -      -       -      +
    380F  LEU*     1.3    77.4    -      -       +      +
    382F  ALA*     1.3    58.9    +      -       -      +
    384F  PHE*     3.5    27.1    -      -       +      -
    385F  SER*     2.8    36.1    +      -       -      +
    420F  VAL*     4.9     2.5    -      -       +      -
    424F  LEU*     3.7    26.7    -      -       +      -
    496F  LEU*     3.7     9.4    -      -       +      -
    499F  ILE*     4.4     7.0    -      -       +      -
    500F  GLY*     4.0    17.3    -      -       -      +
    503F  CYS*     4.0    19.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 382 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    378F  GLU      3.0    17.0    +      -       -      +
    379F  LEU*     3.7     4.9    -      -       -      +
    381F  ILE*     1.3    80.7    -      -       -      +
    383F  SER*     1.3    62.3    +      -       -      +
    385F  SER*     3.4     5.5    +      -       -      -
    386F  HIS*     3.1    24.3    +      -       -      +
    424F  LEU*     5.7     1.3    -      -       -      -
    428F  MET*     3.7     9.5    -      -       +      +
    438F  LEU*     3.9     8.8    -      -       +      +
    441F  LEU*     6.5     0.7    -      -       +      -
    442F  ARG*     4.2    19.5    -      -       +      -
    445F  ILE*     4.9     2.7    -      -       +      -
    496F  LEU*     4.3    17.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 383 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    308F  GLU*     5.3     1.3    -      -       -      -
    346F  GLN*     4.7     6.6    +      -       -      +
    379F  LEU      3.2    11.6    +      -       -      -
    380F  LEU*     3.3    14.2    +      -       -      +
    382F  ALA*     1.3    80.9    -      -       -      +
    384F  PHE*     1.3    59.4    +      -       -      +
    386F  HIS*     3.5     2.8    +      -       -      +
    387F  ARG*     3.0    43.6    +      -       -      +
    438F  LEU*     4.6    10.4    -      -       -      +
    442F  ARG*     3.9    23.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 384 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    339F  ILE*     6.1     5.2    -      -       +      -
    380F  LEU*     3.0    23.6    +      -       +      +
    381F  ILE*     3.5    38.8    -      -       +      -
    383F  SER*     1.3    77.8    +      -       -      +
    385F  SER*     1.3    68.7    +      -       -      +
    387F  ARG*     3.1    32.2    -      -       -      +
    388F  SER*     2.5    35.0    +      -       -      -
    395F  ILE*     3.6    34.5    -      -       +      -
    396F  LEU      4.1     5.6    -      -       -      +
    397F  LEU*     5.2     7.6    -      -       +      -
    420F  VAL*     4.2    18.2    -      -       +      -
    503F  CYS*     6.0     2.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 385 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    381F  ILE*     2.8    25.9    +      -       -      +
    382F  ALA      3.7     4.3    -      -       -      -
    383F  SER      3.3     0.2    -      -       -      -
    384F  PHE*     1.3    80.2    -      -       -      +
    386F  HIS*     1.3    62.8    +      -       -      +
    388F  SER*     3.1    11.6    +      -       -      -
    389F  ILE*     3.7     4.5    +      -       -      +
    420F  VAL*     3.7    12.1    -      -       -      +
    424F  LEU*     3.5    30.4    -      -       -      +
    425F  VAL*     3.5    25.3    -      -       -      +
    428F  MET*     3.8    18.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 386 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    382F  ALA      3.1    14.4    +      -       -      +
    383F  SER      3.8     1.8    -      -       -      +
    385F  SER*     1.3    78.8    -      -       -      +
    387F  ARG*     1.3    63.7    +      -       -      +
    389F  ILE*     3.2    36.4    +      -       +      +
    428F  MET*     3.6     8.5    -      -       +      -
    433F  MET*     2.9    48.0    +      -       +      -
    434F  ASP*     3.7     8.3    +      -       -      -
    435F  LYS*     4.1    33.3    -      -       +      +
    438F  LEU*     3.6    29.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 387 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    346F  GLN*     3.6    24.5    -      -       -      +
    383F  SER*     3.0    30.1    +      -       -      +
    384F  PHE*     3.1    32.6    -      -       -      +
    386F  HIS*     1.3    79.5    +      -       -      +
    388F  SER*     1.3    57.9    +      -       -      +
    389F  ILE      3.3     3.4    +      -       -      -
    390F  ASP*     4.6     6.9    +      -       -      +
    391F  VAL*     5.1     0.9    -      -       -      +
    396F  LEU*     3.1    39.6    +      -       +      +
    397F  LEU*     4.0     5.1    -      -       -      +
    398F  ALA*     3.3    31.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 388 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    384F  PHE      2.5    23.2    +      -       -      -
    385F  SER      3.1     9.8    +      -       -      -
    387F  ARG*     1.3    74.3    -      -       -      +
    389F  ILE*     1.3    63.2    +      -       -      +
    390F  ASP      3.1     3.4    -      -       -      -
    391F  VAL*     3.1    26.4    +      -       -      +
    394F  GLY      3.9     5.2    -      -       -      +
    395F  ILE*     3.3    25.9    -      -       -      +
    396F  LEU*     3.0    19.5    +      -       -      +
    425F  VAL*     3.6    17.2    -      -       -      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il