Contacts of the helix formed by residues 345 - 369 (chain B) in PDB entry 1I0E


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 SER 345 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107B  LYS*     3.0    39.1    +      -       -      +
    109B  ASP*     3.6    20.1    -      -       -      +
    289B  THR*     4.1     3.1    -      -       -      -
    343B  GLY      4.0     1.0    +      -       -      -
    344B  SER*     1.3    74.8    -      -       -      +
    346B  GLU*     1.3    60.2    +      -       -      +
    347B  VAL*     3.4     4.0    +      -       -      +
    348B  GLU*     3.2    34.3    +      -       -      +
    349B  GLN*     2.9    30.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 346 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108B  THR*     3.6    27.6    +      -       -      +
    109B  ASP      3.1    26.7    -      -       -      +
    110B  LEU*     3.9    15.7    -      -       +      +
    135B  ARG*     4.1    14.4    +      -       -      -
    250B  PHE*     4.2     8.1    -      -       +      -
    253B  PHE*     5.1     1.9    -      -       -      -
    279B  TYR*     4.4     1.4    -      -       -      -
    289B  THR*     3.0    45.7    -      -       -      +
    291B  LEU*     3.9    22.7    -      -       +      +
    345B  SER*     1.3    72.6    -      -       -      +
    347B  VAL*     1.3    57.5    +      -       -      +
    349B  GLN*     3.2     5.1    +      -       -      +
    350B  VAL*     2.9    34.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 347 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109B  ASP*     3.2    29.1    +      -       -      +
    111B  ASN      3.1    27.4    -      -       -      +
    114B  ASN*     3.3    35.4    -      -       +      +
    115B  LEU*     3.8     8.9    -      -       +      +
    250B  PHE*     3.7    22.9    -      -       +      -
    345B  SER*     3.4     3.4    +      -       -      +
    346B  GLU*     1.3    75.5    -      -       -      +
    348B  GLU*     1.3    73.9    +      -       +      +
    350B  VAL*     3.3     1.2    +      -       -      +
    351B  GLN*     2.8    26.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 348 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107B  LYS*     2.9    32.2    -      -       -      +
    343B  GLY      5.3     0.6    -      -       -      +
    344B  SER*     4.3    12.0    -      -       -      -
    345B  SER*     3.2    28.3    +      -       -      +
    347B  VAL*     1.3    80.5    -      -       +      +
    349B  GLN*     1.3    58.4    +      -       -      +
    351B  GLN*     2.9    10.3    -      -       -      +
    352B  LEU*     2.9    38.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 349 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    289B  THR*     2.8    23.6    +      -       -      +
    291B  LEU*     3.9    11.2    -      -       +      +
    338B  ASN*     3.4    24.3    -      -       +      +
    340B  ASP*     3.0    27.8    +      -       +      +
    341B  ARG*     3.6    10.3    +      -       -      -
    344B  SER*     2.9    48.0    +      -       -      -
    345B  SER      2.9    13.6    +      -       -      +
    346B  GLU*     3.4     4.4    -      -       -      +
    347B  VAL      3.1     0.2    -      -       -      -
    348B  GLU*     1.3    73.2    -      -       -      +
    350B  VAL*     1.3    68.1    +      -       -      +
    352B  LEU*     3.0    18.8    +      -       +      +
    353B  VAL*     2.9    17.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 350 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115B  LEU*     4.1    10.3    -      -       +      -
    131B  VAL*     4.9     5.4    -      -       +      -
    246B  MET*     4.0    25.8    -      -       +      -
    250B  PHE*     3.4    52.0    -      -       +      -
    291B  LEU*     4.1    17.0    -      -       +      -
    293B  GLY*     5.4     2.5    -      -       -      -
    346B  GLU      2.9    19.0    +      -       -      +
    347B  VAL      3.9     2.9    -      -       -      +
    349B  GLN*     1.3    70.7    -      -       -      +
    351B  GLN*     1.3    55.7    +      -       -      +
    353B  VAL*     2.8    37.6    +      -       +      +
    354B  VAL*     3.1     9.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 351 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114B  ASN      4.0     4.0    +      -       -      -
    115B  LEU*     3.6    12.6    -      -       -      +
    116B  LYS*     2.7    61.3    -      -       -      +
    347B  VAL*     2.8    15.4    +      -       -      +
    348B  GLU*     2.9    19.1    -      -       -      +
    350B  VAL*     1.3    72.5    -      -       -      +
    352B  LEU*     1.3    56.3    +      -       +      +
    353B  VAL      2.5    17.3    +      -       -      -
    354B  VAL*     2.8    18.9    +      -       -      +
    355B  ASP*     3.2    40.4    +      -       -      +
    380B  GLN*     5.4     1.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 352 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    315B  LEU      4.7     0.7    -      -       -      +
    316B  ARG*     3.8    36.6    -      -       +      +
    317B  LEU*     3.6    11.1    -      -       +      +
    338B  ASN*     5.4     3.6    -      -       +      -
    340B  ASP*     5.4     3.1    -      -       -      +
    348B  GLU*     2.9    36.3    +      -       +      +
    349B  GLN*     3.4    12.8    -      -       +      +
    351B  GLN*     1.3    75.8    -      -       +      +
    353B  VAL*     1.3    59.3    +      -       +      +
    356B  GLY      3.7     1.4    +      -       -      -
    379B  ALA      4.8     1.3    -      -       -      -
    380B  GLN*     4.0    19.3    -      -       -      +
    381B  LYS*     2.4    59.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 353 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    246B  MET*     4.8     7.9    -      -       +      -
    293B  GLY*     3.9    26.5    -      -       -      +
    294B  GLY*     4.3    10.8    -      -       -      +
    295B  VAL*     5.1     0.2    -      -       +      -
    317B  LEU*     4.4     7.6    -      -       +      -
    336B  VAL      4.6     4.5    -      -       -      +
    338B  ASN*     3.8    24.0    -      -       +      +
    349B  GLN      2.9    19.7    -      -       -      +
    350B  VAL*     2.9    18.6    -      -       +      +
    351B  GLN      2.5     9.7    +      -       -      -
    352B  LEU*     1.3    74.9    -      -       -      +
    354B  VAL*     1.3    57.9    +      -       +      +
    355B  ASP      3.5     0.2    -      -       -      -
    357B  VAL*     2.8    48.7    +      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
    115B  LEU*     4.4     9.4    -      -       +      -
    118B  GLY*     3.3    34.8    -      -       -      +
    121B  LEU*     4.7    11.3    -      -       +      +
    246B  MET*     4.0    26.5    -      -       +      -
    350B  VAL      3.3    16.8    -      -       -      +
    351B  GLN*     2.8    19.1    +      -       -      +
    353B  VAL*     1.3    72.8    -      -       -      +
    355B  ASP*     1.3    85.1    +      -       -      +
    357B  VAL*     3.7     4.2    -      -       -      +
    358B  LYS*     2.8    39.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 355 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116B  LYS      4.7     1.2    -      -       -      +
    118B  GLY      5.1     0.2    +      -       -      -
    351B  GLN*     3.2    31.0    +      -       -      +
    354B  VAL*     1.3    96.1    -      -       -      +
    356B  GLY*     1.3    64.5    +      -       -      +
    358B  LYS*     3.1    17.5    +      -       -      +
    359B  LEU      3.1    17.5    +      -       -      -
    380B  GLN*     3.9    15.9    +      -       -      +
    381B  LYS*     3.1    41.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 356 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    315B  LEU*     3.6     4.3    -      -       -      +
    317B  LEU*     4.2     4.0    -      -       -      -
    352B  LEU      3.7     5.4    +      -       -      -
    353B  VAL      3.6     2.0    +      -       -      -
    354B  VAL      3.3     0.6    -      -       -      -
    355B  ASP*     1.3    79.4    -      -       -      +
    357B  VAL*     1.3    60.4    +      -       -      +
    359B  LEU*     3.2     6.2    +      -       -      +
    360B  MET*     3.0    26.3    +      -       -      +
    381B  LYS*     2.7    40.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 357 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121B  LEU*     3.7    24.0    -      -       +      -
    126B  VAL*     4.3     2.9    -      -       +      -
    295B  VAL*     3.5    25.4    -      -       +      -
    297B  VAL*     3.7    25.6    -      -       +      -
    317B  LEU*     4.7     4.2    -      -       +      +
    336B  VAL*     5.1     9.0    -      -       +      -
    353B  VAL*     2.8    40.4    +      -       +      +
    354B  VAL      3.7     2.9    -      -       -      +
    356B  GLY*     1.3    70.0    -      -       -      +
    358B  LYS*     1.3    66.3    +      -       -      +
    360B  MET*     3.0    19.4    +      -       +      +
    361B  VAL*     3.0    19.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 358 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118B  GLY      4.6     6.3    -      -       -      +
    119B  ASP*     2.8    34.4    +      -       -      +
    121B  LEU*     4.4    21.8    -      -       +      -
    354B  VAL*     2.8    29.0    +      -       +      +
    355B  ASP*     3.1    24.4    +      -       -      +
    357B  VAL*     1.3    74.3    -      -       -      +
    359B  LEU*     1.3    57.1    +      -       -      +
    361B  VAL*     3.5     6.2    +      -       -      +
    362B  GLU*     3.0    34.4    +      -       +      +
    381B  LYS*     4.6     8.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 359 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    315B  LEU*     4.1    10.8    -      -       +      -
    355B  ASP      3.1     5.1    +      -       -      -
    356B  GLY      3.6     8.7    -      -       -      +
    357B  VAL      3.1     0.8    -      -       -      -
    358B  LYS*     1.3    74.6    -      -       -      +
    360B  MET*     1.3    67.6    +      -       -      +
    362B  GLU*     4.3    13.9    -      -       +      +
    363B  MET*     2.9    56.7    +      -       +      +
    374B  ASP      5.0     5.4    -      -       -      +
    375B  ASP*     5.1     0.2    -      -       -      -
    376B  MET*     3.4    32.8    -      -       +      -
    381B  LYS*     3.5    37.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 360 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    297B  VAL*     5.4     2.9    -      -       +      -
    299B  LEU*     3.5    32.0    -      -       +      +
    302B  LEU*     3.4    21.1    -      -       +      +
    308B  PHE*     3.7    11.7    -      -       +      -
    311B  ILE*     4.6     8.3    -      -       -      -
    312B  LEU*     3.4    31.4    -      -       +      -
    315B  LEU*     3.9    20.6    -      -       -      -
    317B  LEU*     5.0     3.4    -      -       +      -
    336B  VAL*     5.0    10.8    -      -       +      -
    356B  GLY      3.0    22.4    +      -       -      +
    357B  VAL*     3.0    17.7    +      -       +      +
    359B  LEU*     1.3    78.0    -      -       -      +
    361B  VAL*     1.3    56.7    +      -       +      +
    363B  MET*     3.5     2.2    -      -       -      +
    364B  GLU*     2.8    29.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 361 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121B  LEU*     5.6     1.8    -      -       +      -
    122B  ASP*     4.0    13.5    -      -       +      +
    125B  TYR*     3.6    44.9    -      -       +      -
    126B  VAL*     4.7     8.1    -      -       +      -
    297B  VAL*     5.1     1.8    -      -       +      -
    299B  LEU*     4.9     6.5    -      -       +      -
    357B  VAL*     3.0    27.3    +      -       +      +
    358B  LYS*     3.8     7.0    -      -       -      +
    360B  MET*     1.3    75.7    -      -       +      +
    362B  GLU*     1.3    68.1    +      -       -      +
    363B  MET      2.9     2.0    +      -       -      -
    364B  GLU*     3.1     6.0    +      -       -      +
    365B  LYS*     2.8    37.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 362 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    358B  LYS*     3.0    20.9    +      -       +      +
    359B  LEU*     3.8    15.4    -      -       +      +
    361B  VAL*     1.3    74.8    -      -       -      +
    363B  MET*     1.3    64.0    +      -       -      +
    365B  LYS*     3.6    11.6    -      -       +      +
    366B  LYS*     3.2    28.7    +      -       -      +
    381B  LYS*     4.9     9.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 363 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    302B  LEU*     3.4    27.4    -      -       +      -
    311B  ILE*     3.9    31.9    -      -       +      -
    359B  LEU*     2.9    59.7    +      -       +      +
    360B  MET*     3.5     1.1    -      -       -      +
    362B  GLU*     1.3    73.5    -      -       -      +
    364B  GLU*     1.3    70.9    +      -       -      +
    365B  LYS      2.9     1.3    -      -       -      -
    366B  LYS*     2.6    17.4    +      -       -      -
    367B  LEU*     2.9    16.4    +      -       -      +
    373B  ILE*     4.1    26.7    -      -       +      -
    374B  ASP      4.0    19.1    -      -       -      +
    375B  ASP*     4.2    10.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 364 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125B  TYR*     4.0    17.0    -      -       +      -
    298B  LYS*     3.7     3.0    -      -       -      +
    299B  LEU*     3.2    21.0    -      -       +      -
    300B  ALA*     2.6    31.5    +      -       -      +
    301B  HIS*     3.1    12.0    +      -       -      +
    302B  LEU*     2.6    35.6    +      -       +      +
    360B  MET      2.8    21.7    +      -       -      +
    361B  VAL*     3.5     6.5    -      -       -      +
    363B  MET*     1.3    71.7    -      -       -      +
    365B  LYS*     1.3    62.2    +      -       -      +
    367B  LEU*     3.1    21.4    +      -       -      +
    368B  GLU*     3.1    23.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 365 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122B  ASP*     2.9    29.3    +      -       -      +
    125B  TYR*     3.3    31.2    -      -       +      +
    361B  VAL*     2.8    28.6    +      -       +      +
    362B  GLU*     3.6    10.1    -      -       +      +
    363B  MET      2.7     3.6    +      -       -      -
    364B  GLU*     1.3    69.1    -      -       -      +
    366B  LYS*     1.3    56.0    +      -       +      +
    367B  LEU      2.9     4.5    -      -       -      -
    368B  GLU*     2.5    41.6    +      -       -      +
    369B  LYS*     3.0    12.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 366 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    362B  GLU*     3.2    18.7    +      -       -      +
    363B  MET*     2.6    13.2    +      -       -      +
    365B  LYS*     1.3    75.3    -      -       +      +
    367B  LEU*     1.3    58.2    +      -       -      +
    368B  GLU      3.2     0.4    +      -       -      -
    369B  LYS*     3.5    13.5    +      -       -      +
    371B  GLN*     3.1    48.3    +      -       +      +
    372B  SER      4.1    15.4    +      -       -      +
    373B  ILE*     4.1    17.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 367 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    301B  HIS*     4.0    32.9    +      -       +      +
    302B  LEU*     4.6     8.1    -      -       +      +
    305B  HIS*     4.5    15.5    -      -       +      -
    363B  MET*     2.9    24.4    +      -       +      +
    364B  GLU*     3.1    14.1    -      -       -      +
    365B  LYS      2.8     0.8    +      -       -      -
    366B  LYS*     1.3    77.1    -      -       -      +
    368B  GLU*     1.3    62.5    +      -       -      +
    369B  LYS      3.1     2.0    +      -       -      -
    370B  GLY*     3.4    11.3    +      -       -      -
    371B  GLN      4.4    11.7    -      -       -      +
    373B  ILE*     3.4    42.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 368 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125B  TYR*     2.6    42.6    +      -       -      -
    301B  HIS*     4.8    12.7    -      -       +      +
    364B  GLU*     3.1    13.8    +      -       +      +
    365B  LYS*     2.5    34.8    +      -       -      +
    367B  LEU*     1.3    72.1    -      -       -      +
    369B  LYS*     1.3    73.4    +      -       +      +
    370B  GLY      3.5     1.6    +      -       -      -
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Residues in contact with LYS 369 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    365B  LYS*     3.0    31.7    +      -       -      +
    366B  LYS*     3.5     9.1    +      -       -      +
    367B  LEU      3.1     0.6    -      -       -      -
    368B  GLU*     1.3    93.0    -      -       +      +
    370B  GLY*     1.3    66.8    +      -       -      +
    371B  GLN*     2.8    33.3    +      -       -      +
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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