Contacts of the helix formed by residues 386 - 411 (chain A) in PDB entry 4CZ8


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 THR 386 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    377A  ALA*     3.7    10.8    -      -       -      +
    382A  SER      5.0     0.7    -      -       -      +
    384A  LEU      4.6     3.3    +      -       -      -
    385A  LEU*     1.3    79.7    -      -       -      +
    387A  VAL*     1.3    75.3    +      -       +      +
    388A  HIS*     3.4    10.1    -      -       +      +
    389A  TRP*     3.4    29.9    -      -       -      +
    390A  GLY*     3.0    17.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 387 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    374A  LEU*     3.5    21.4    -      -       +      +
    377A  ALA*     3.8    26.2    -      -       +      +
    378A  LEU*     3.7    24.2    -      -       +      -
    386A  THR*     1.3    77.6    -      -       +      +
    388A  HIS*     1.3    60.3    +      -       -      +
    390A  GLY*     3.0     4.5    +      -       -      -
    391A  GLU*     2.9    29.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 388 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    317A  VAL*     4.6    18.2    -      -       +      +
    321A  ASN*     5.8     1.0    +      -       -      -
    386A  THR*     3.4     8.3    -      -       +      +
    387A  VAL*     1.3    80.3    -      -       -      +
    389A  TRP*     1.3    67.1    +      +       +      +
    391A  GLU*     3.1    12.4    +      -       -      +
    392A  ILE*     2.9    61.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with TRP 389 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108A  PHE*     5.0     4.0    -      +       -      -
    112A  PHE*     4.0    32.5    -      +       +      -
    113A  ASN*     3.0    38.1    -      -       -      -
    114A  SER*     4.3     7.6    -      -       -      -
    118A  LEU*     4.3    27.1    -      -       +      +
    384A  LEU      5.7     2.0    -      -       -      -
    385A  LEU*     5.3     1.8    -      -       +      -
    386A  THR*     3.4    37.2    +      -       -      +
    387A  VAL      3.2     0.6    -      -       -      -
    388A  HIS*     1.3    82.6    -      +       +      +
    390A  GLY*     1.3    60.3    +      -       -      +
    392A  ILE*     3.2    27.3    +      -       +      +
    393A  ILE*     2.9    36.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 390 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    373A  PRO*     4.4    12.7    -      -       -      +
    374A  LEU*     4.1    29.1    -      -       -      +
    385A  LEU*     6.0     0.8    -      -       -      +
    386A  THR      3.0    10.9    +      -       -      -
    387A  VAL      3.0     8.9    +      -       -      -
    389A  TRP*     1.3    77.8    -      -       -      +
    391A  GLU*     1.3    55.6    +      -       -      +
    393A  ILE*     3.2     4.3    +      -       -      +
    394A  MSE      2.9    30.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 391 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51A  ARG*     2.4    43.7    +      -       -      -
    314A  ASN*     3.0    28.5    +      -       -      +
    317A  VAL*     3.9    20.3    -      -       +      +
    374A  LEU*     3.7    16.1    -      -       +      +
    387A  VAL*     2.9    21.4    +      -       +      +
    388A  HIS*     3.1    15.7    +      -       -      +
    390A  GLY*     1.3    76.4    -      -       -      +
    392A  ILE*     1.3    56.9    +      -       +      +
    394A  MSE      3.5    12.1    -      -       -      +
    395A  ALA*     2.9    32.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 392 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108A  PHE*     3.5    25.4    -      -       +      -
    112A  PHE*     4.1     7.2    -      -       +      -
    317A  VAL*     4.1    16.2    -      -       +      -
    321A  ASN*     3.6    28.7    -      -       +      +
    388A  HIS*     2.9    50.1    +      -       +      +
    389A  TRP*     3.2    33.8    +      -       +      +
    391A  GLU*     1.3    77.0    -      -       -      +
    393A  ILE*     1.3    53.8    +      -       -      +
    395A  ALA*     3.7     4.2    -      -       -      +
    396A  THR*     2.4    42.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 393 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108A  PHE*     3.9    20.6    -      -       +      -
    118A  LEU*     4.3    26.9    -      -       +      +
    121A  LEU*     3.7    26.5    -      -       +      -
    122A  PHE*     4.3    11.2    -      -       +      -
    125A  ILE*     4.0    20.0    -      -       +      -
    370A  ALA      4.8     0.2    -      -       -      +
    373A  PRO*     3.9    22.4    -      -       +      -
    385A  LEU*     6.3     1.1    -      -       +      -
    389A  TRP*     2.9    23.9    +      -       +      +
    390A  GLY*     3.2     4.2    +      -       -      +
    392A  ILE*     1.3    77.0    -      -       -      +
    394A  MSE      1.3    58.8    +      -       -      +
    396A  THR*     3.3     5.3    +      -       -      -
    397A  VAL*     2.9    37.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with MSE 394 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51A  ARG*     3.9     2.9    -      -       -      +
    309A  LEU*     4.6     2.7    -      -       +      -
    312A  GLU*     3.4    33.9    -      -       -      +
    313A  MSE      3.6    18.8    -      -       +      -
    314A  ASN*     4.3     2.7    -      -       -      +
    318A  ILE*     5.7     0.4    -      -       +      -
    370A  ALA*     3.2    33.1    +      -       +      +
    371A  SER*     3.2    29.2    -      -       -      +
    374A  LEU*     4.5     9.4    -      -       +      -
    390A  GLY      2.9    16.9    +      -       -      +
    391A  GLU*     3.5    25.6    -      -       -      +
    393A  ILE*     1.3    75.3    -      -       -      +
    395A  ALA*     1.3    65.5    +      -       +      +
    397A  VAL*     3.3     4.7    +      -       -      +
    398A  VAL*     2.9    39.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 395 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    314A  ASN*     5.9     0.2    -      -       -      +
    317A  VAL*     4.0    17.0    -      -       +      +
    318A  ILE*     3.6    32.5    -      -       +      -
    321A  ASN*     6.3     2.5    -      -       +      -
    391A  GLU      2.9    19.3    +      -       -      +
    392A  ILE*     3.7     4.0    -      -       -      +
    394A  MSE      1.3    79.3    -      -       +      +
    396A  THR*     1.3    62.6    +      -       -      +
    398A  VAL*     3.1     4.9    +      -       -      +
    399A  ILE*     2.9    32.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 396 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108A  PHE*     3.5    17.5    -      -       +      -
    112A  PHE*     4.3     4.9    -      -       +      -
    122A  PHE*     3.5    27.1    -      -       +      -
    321A  ASN*     6.1     0.5    -      -       -      +
    325A  GLY*     4.3    10.7    -      -       -      +
    328A  VAL*     3.7    28.0    -      -       +      -
    392A  ILE*     2.4    31.1    +      -       -      +
    393A  ILE      3.7     2.0    -      -       -      -
    395A  ALA*     1.3    76.6    -      -       -      +
    397A  VAL*     1.3    51.8    +      -       -      +
    399A  ILE*     3.6     7.1    +      -       -      +
    400A  THR*     2.4    38.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 397 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122A  PHE*     3.6    20.6    -      -       +      -
    125A  ILE*     4.0    18.6    -      -       +      -
    126A  ILE*     4.2     5.8    -      -       +      -
    309A  LEU*     5.9     0.2    -      -       +      -
    366A  PRO*     3.5    36.3    -      -       +      +
    367A  SER*     5.1     0.4    -      -       -      -
    370A  ALA*     3.6    12.8    -      -       +      -
    393A  ILE*     2.9    29.5    +      -       +      +
    394A  MSE      3.5     4.3    -      -       -      +
    395A  ALA      3.2     0.2    -      -       -      -
    396A  THR*     1.3    73.4    -      -       -      +
    398A  VAL*     1.3    61.4    +      -       -      +
    400A  THR*     3.2     7.1    +      -       -      -
    401A  VAL*     2.9    35.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 398 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36A  ILE*     5.1     6.5    -      -       +      +
    309A  LEU*     3.7    36.3    -      -       +      -
    313A  MSE      3.7    37.0    -      -       +      -
    318A  ILE*     4.8     4.7    -      -       +      -
    394A  MSE      2.9    24.1    +      -       +      +
    395A  ALA*     3.4    10.3    -      -       -      +
    397A  VAL*     1.3    76.2    -      -       -      +
    399A  ILE*     1.3    66.3    +      -       +      +
    401A  VAL*     3.1     8.7    +      -       -      +
    402A  LEU*     2.9    38.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 399 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    318A  ILE*     4.4    20.9    -      -       +      +
    321A  ASN      4.4     1.8    -      -       -      +
    322A  LEU*     4.1    37.2    -      -       +      +
    325A  GLY*     3.9    26.0    -      -       -      +
    326A  LEU*     3.8    22.0    -      -       +      -
    329A  ALA*     4.7     0.4    -      -       +      -
    395A  ALA*     2.9    24.4    +      -       +      +
    396A  THR      3.8     4.0    -      -       -      +
    398A  VAL*     1.3    78.5    -      -       +      +
    400A  THR*     1.3    63.4    +      -       -      +
    402A  LEU*     3.4     6.7    +      -       +      +
    403A  THR*     2.9    37.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 400 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122A  PHE*     3.5    13.5    -      -       +      -
    126A  ILE*     4.3    27.4    -      -       +      -
    325A  GLY      5.1     0.2    +      -       -      -
    329A  ALA*     3.9    27.8    +      -       +      +
    332A  VAL*     5.2     6.5    -      -       +      -
    333A  MSE      6.3     1.1    -      -       +      -
    362A  ARG*     4.3    14.6    -      -       +      -
    396A  THR*     2.4    30.1    +      -       -      +
    397A  VAL*     3.3     8.3    -      -       -      -
    399A  ILE*     1.3    77.1    -      -       -      +
    401A  VAL*     1.3    57.4    +      -       -      +
    403A  THR*     4.0     0.5    -      -       -      -
    404A  SER*     2.9    37.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 401 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32A  VAL*     3.9    25.4    -      -       +      -
     36A  ILE*     4.4     9.4    -      -       +      -
    126A  ILE*     5.8     0.2    -      -       +      -
    309A  LEU*     5.2     1.8    -      -       +      -
    362A  ARG*     3.3    35.7    -      -       +      +
    363A  GLY*     4.4     3.1    -      -       -      +
    366A  PRO*     4.5     3.6    -      -       +      -
    367A  SER*     4.1    22.4    -      -       -      +
    397A  VAL*     2.9    30.8    +      -       +      +
    398A  VAL*     3.5     9.4    -      -       -      +
    400A  THR*     1.3    75.9    -      -       -      +
    402A  LEU*     1.3    64.7    +      -       -      +
    404A  SER*     4.8     0.2    -      -       -      -
    405A  VAL*     2.9    30.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 402 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32A  VAL*     5.0     1.6    -      -       +      -
     33A  PRO*     4.0    30.3    -      -       +      +
     36A  ILE*     4.0    32.8    -      -       +      -
    313A  MSE      5.8     4.0    -      -       +      -
    398A  VAL*     2.9    30.7    +      -       +      +
    399A  ILE*     3.8     7.0    -      -       +      +
    401A  VAL*     1.3    76.1    -      -       -      +
    403A  THR*     1.3    64.5    +      -       -      +
    405A  VAL*     4.0     1.5    -      -       -      +
    406A  ILE*     2.9    40.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 403 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    326A  LEU*     3.6    23.4    -      -       +      +
    329A  ALA*     4.0    15.7    -      -       +      +
    330A  LEU*     4.3    14.4    -      -       +      -
    333A  MSE      3.6    19.7    -      -       -      -
    399A  ILE*     2.9    24.9    +      -       -      +
    400A  THR      4.0     0.2    -      -       -      -
    402A  LEU*     1.3    72.4    -      -       -      +
    404A  SER*     1.3    58.3    +      -       -      +
    406A  ILE*     4.0     2.6    -      -       -      +
    407A  VAL*     2.9    46.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 404 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    333A  MSE      3.7    22.8    -      -       -      +
    360A  GLY      4.6     0.5    +      -       -      -
    361A  PRO*     3.2    25.6    -      -       -      +
    362A  ARG*     3.7    14.2    +      -       -      +
    400A  THR*     2.9    26.5    +      -       -      -
    401A  VAL      4.1     0.9    -      -       -      -
    403A  THR*     1.3    72.9    -      -       -      +
    405A  VAL*     1.3    58.7    +      -       -      +
    408A  GLU*     2.9    46.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 405 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30A  SER*     3.7    25.4    -      -       -      +
     32A  VAL*     4.2    21.1    -      -       +      -
     33A  PRO*     4.7     4.7    -      -       +      -
    130A  ASP      5.8     0.4    -      -       -      +
    133A  THR*     4.1    10.5    -      -       +      -
    361A  PRO*     3.8    17.5    -      -       +      -
    362A  ARG      3.3    22.4    -      -       -      +
    363A  GLY*     4.8     1.6    -      -       -      -
    401A  VAL*     2.9    31.5    +      -       +      +
    402A  LEU*     4.0     2.2    -      -       -      +
    404A  SER*     1.3    71.6    -      -       -      +
    406A  ILE*     1.3    64.8    +      -       +      +
    409A  THR*     2.5    37.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 406 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30A  SER*     6.2     1.3    -      -       -      -
     33A  PRO*     3.9    31.9    -      -       +      -
    402A  LEU*     2.9    37.1    +      -       +      +
    403A  THR*     4.0     3.1    -      -       -      +
    405A  VAL*     1.3    74.4    -      -       -      +
    407A  VAL*     1.3    63.8    +      -       +      +
    409A  THR*     3.8     3.1    -      -       -      -
    410A  LEU*     2.9    45.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 407 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    330A  LEU*     5.9     2.9    -      -       +      -
    333A  MSE      3.6    19.3    -      -       +      -
    403A  THR*     2.9    36.7    +      -       +      +
    406A  ILE*     1.3    76.8    -      -       +      +
    408A  GLU*     1.3    55.8    +      -       -      +
    409A  THR      3.1     0.2    -      -       -      -
    410A  LEU*     2.9     5.3    +      -       -      -
    411A  TRP*     2.7    66.6    +      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 408 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134A  LEU*     3.5     6.8    -      -       -      +
    333A  MSE      3.9    31.0    -      -       +      +
    337A  ARG*     5.8     1.9    -      -       -      +
    357A  ALA      4.6     1.9    -      -       -      +
    358A  LEU*     2.9    28.8    -      -       -      +
    359A  GLU*     2.8    32.1    -      -       -      +
    360A  GLY      2.9    27.9    +      -       -      +
    361A  PRO*     3.0    18.9    -      -       +      -
    404A  SER*     2.9    35.7    +      -       -      +
    405A  VAL      4.5     0.2    -      -       -      +
    407A  VAL*     1.3    74.0    -      -       -      +
    409A  THR*     1.3    58.9    +      -       -      +
    411A  TRP*     3.3    14.3    -      -       -      +
    412A  ILE*     4.0     4.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 409 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30A  SER*     4.9     8.1    -      -       -      -
    133A  THR*     3.3    39.4    +      -       -      +
    134A  LEU*     3.4    17.6    -      -       +      +
    137A  LEU*     3.4    22.5    -      -       +      +
    361A  PRO*     5.1     0.2    -      -       -      +
    405A  VAL*     2.5    31.1    +      -       -      +
    406A  ILE*     4.0     2.9    -      -       -      -
    408A  GLU*     1.3    77.0    -      -       -      +
    410A  LEU*     1.3    62.5    +      -       -      +
    412A  ILE*     3.2    18.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 410 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    406A  ILE*     2.9    29.6    +      -       +      +
    407A  VAL*     2.9     4.8    +      -       -      +
    409A  THR*     1.3    81.2    -      -       -      +
    411A  TRP*     1.3    58.7    +      -       -      +
    412A  ILE      3.3     0.9    -      -       -      -
    413A  PRO*     3.4    19.6    -      -       -      +
    414A  ILE*     5.1     3.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 411 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    333A  MSE      4.3    13.7    -      -       +      -
    334A  ILE*     4.6    18.6    -      -       +      -
    358A  LEU*     3.0    54.7    -      -       +      -
    359A  GLU*     2.6    23.8    +      -       -      -
    407A  VAL*     2.7    43.0    +      -       +      +
    408A  GLU*     3.3    22.4    -      -       +      +
    410A  LEU*     1.3    72.9    -      -       +      +
    412A  ILE*     1.3    64.6    +      -       -      +
    413A  PRO*     3.4     2.0    -      -       -      -
    414A  ILE*     3.2    18.0    +      -       +      +
    415A  LEU*     2.9    35.6    +      -       +      +
----------------------------------------------------------
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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