Contacts of the helix formed by residues 374 - 400 (chain A) in PDB entry 6EBT


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 374 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    343A  ARG*     3.5    32.1    -      -       +      +
    358A  LEU*     3.6    31.0    -      -       +      -
    372A  VAL      3.6     6.2    -      -       -      +
    373A  ASN*     1.3    81.8    -      -       +      +
    375A  THR*     1.3    64.0    +      -       -      +
    376A  GLN      3.3     2.7    -      -       -      -
    377A  CYS*     3.2    24.1    +      -       +      +
    378A  GLU*     3.2    25.6    +      -       -      +
    434A  CYS*     6.2     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with THR 375 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    361A  ASN*     3.5    28.1    +      -       +      +
    362A  GLU*     3.5    42.2    -      -       +      +
    373A  ASN*     2.8    23.7    +      -       +      +
    374A  PRO*     1.3    72.3    -      -       -      +
    376A  GLN*     1.3    70.8    +      -       -      +
    378A  GLU*     3.0    22.4    +      -       -      +
    379A  ALA*     3.1    12.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 376 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    361A  ASN*     4.0    12.1    +      -       -      +
    374A  PRO      3.3     0.6    -      -       -      -
    375A  THR*     1.3    85.1    +      -       -      +
    377A  CYS*     1.3    61.1    +      -       -      +
    378A  GLU      3.2     0.2    +      -       -      -
    379A  ALA*     3.2    13.5    +      -       -      +
    380A  MET*     2.9    30.8    +      -       -      +
    429A  SER*     2.6    36.7    +      -       -      +
    430A  PHE*     3.8    21.2    +      -       +      +
    433A  ASN*     3.7    41.9    -      -       +      +
    434A  CYS*     4.0     9.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 377 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    339A  ALA*     3.5    28.7    -      -       -      +
    342A  ILE*     3.9    13.7    -      -       -      -
    343A  ARG*     3.8    22.9    -      -       +      +
    358A  LEU*     4.5     3.8    -      -       -      -
    374A  PRO*     3.2    25.4    +      -       +      +
    376A  GLN*     1.3    76.6    -      -       -      +
    378A  GLU*     1.3    57.5    +      -       -      +
    380A  MET*     3.9     0.3    -      -       -      +
    381A  THR*     2.9    36.6    +      -       -      +
    430A  PHE*     3.7    24.0    -      -       -      -
    434A  CYS*     4.5     3.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 378 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    343A  ARG*     3.6    20.3    +      -       -      +
    373A  ASN*     5.2     5.5    -      -       -      +
    374A  PRO*     3.2    30.2    +      -       +      +
    375A  THR*     3.0    14.4    +      -       -      +
    377A  CYS*     1.3    74.8    -      -       -      +
    379A  ALA*     1.3    63.8    +      -       -      +
    381A  THR*     3.2     7.2    +      -       -      -
    382A  MET*     3.0    37.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 379 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    375A  THR      3.1    11.3    +      -       -      +
    376A  GLN*     3.2    18.6    +      -       -      +
    378A  GLU*     1.3    77.5    -      -       -      +
    380A  MET*     1.3    55.4    +      -       -      +
    382A  MET*     3.7    13.7    -      -       +      +
    383A  VAL*     3.0    35.8    +      -       +      +
    426A  ALA*     5.4     2.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 380 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    214A  LEU*     5.0     0.4    -      -       +      -
    335A  LEU*     3.8    39.0    -      -       +      +
    339A  ALA*     3.8    21.3    -      -       +      -
    376A  GLN      2.9    16.8    +      -       -      +
    377A  CYS      3.9     3.8    -      -       -      +
    379A  ALA*     1.3    78.3    -      -       -      +
    381A  THR*     1.3    56.6    +      -       -      +
    383A  VAL*     3.2     9.4    +      -       -      +
    384A  ALA*     2.9    25.6    +      -       -      +
    423A  LEU*     4.8     1.3    -      -       -      +
    426A  ALA*     3.4    46.4    -      -       +      +
    427A  SER*     3.6    15.5    -      -       -      +
    430A  PHE*     3.9    22.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 381 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    336A  MET*     3.5    36.1    -      -       -      +
    339A  ALA*     3.6    21.8    -      -       +      -
    340A  ASN*     4.1     6.1    -      -       -      +
    343A  ARG*     3.4    28.3    +      -       -      +
    377A  CYS      2.9    22.3    +      -       -      +
    378A  GLU*     3.2    11.3    +      -       -      -
    380A  MET*     1.3    72.6    -      -       -      +
    382A  MET*     1.3    65.9    +      -       -      +
    384A  ALA*     3.4     2.4    +      -       -      -
    385A  ALA*     3.1    20.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 382 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    378A  GLU*     3.0    29.5    +      -       +      +
    379A  ALA*     3.7    14.1    -      -       +      +
    381A  THR*     1.3    76.2    +      -       -      +
    383A  VAL*     1.3    65.4    +      -       +      +
    385A  ALA*     3.3     7.2    +      -       -      +
    386A  GLN*     3.0    22.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 383 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    379A  ALA*     3.0    19.8    +      -       +      +
    380A  MET*     3.2    11.6    +      -       -      +
    382A  MET*     1.3    77.1    -      -       +      +
    384A  ALA*     1.3    62.4    +      -       -      +
    386A  GLN*     3.1     7.9    +      -       -      +
    387A  VAL*     2.9    23.7    +      -       +      +
    422A  LEU*     3.6    51.4    -      -       +      +
    423A  LEU*     4.0    17.0    -      -       +      -
    426A  ALA*     4.1    16.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 384 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    332A  ALA*     3.5    36.8    -      -       +      +
    335A  LEU*     5.0     3.4    -      -       +      -
    336A  MET*     3.9    19.3    -      -       +      +
    380A  MET*     2.9    14.0    +      -       -      +
    381A  THR*     3.6     9.4    -      -       -      +
    382A  MET      3.3     0.2    -      -       -      -
    383A  VAL*     1.3    77.5    -      -       -      +
    385A  ALA*     1.3    63.8    +      -       -      +
    387A  VAL*     3.2     5.5    +      -       -      +
    388A  MET*     3.2    27.6    +      -       +      +
    423A  LEU*     5.1     2.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 385 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    336A  MET*     3.9     9.7    -      -       +      +
    381A  THR      3.1    14.6    +      -       -      +
    382A  MET*     3.7     9.0    -      -       -      +
    383A  VAL      3.3     0.2    -      -       -      -
    384A  ALA*     1.3    75.2    -      -       -      +
    386A  GLN*     1.3    62.3    +      -       -      +
    388A  MET*     3.1    23.8    +      -       -      +
    389A  GLY*     3.2    10.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 386 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    382A  MET      3.0    13.8    +      -       -      +
    383A  VAL*     3.1    12.1    +      -       -      +
    385A  ALA*     1.3    77.0    -      -       -      +
    387A  VAL*     1.3    56.8    +      -       -      +
    389A  GLY*     3.1     4.9    +      -       -      +
    390A  ASN*     2.8    65.8    +      -       -      +
    418A  HIS*     4.1    11.6    -      -       +      -
    422A  LEU*     4.1    17.9    -      -       +      -
----------------------------------------------------------
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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
----------------------------------------------------------
    325A  SER*     5.2     1.5    +      -       -      +
    328A  MET*     3.5    35.4    -      -       +      +
    329A  ASN*     4.1     4.3    -      -       +      +
    332A  ALA*     3.9     6.7    -      -       +      -
    383A  VAL*     2.9    22.7    +      -       +      +
    384A  ALA      3.2     7.6    +      -       -      +
    386A  GLN*     1.3    75.9    -      -       +      +
    388A  MET*     1.3    58.0    +      -       -      +
    390A  ASN*     3.3     2.2    +      -       -      +
    391A  HIS*     2.9    28.0    +      -       +      +
    419A  SER*     3.8    34.0    +      -       -      +
    422A  LEU*     5.2     1.6    -      -       +      -
    423A  LEU*     3.8    28.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 388 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    329A  ASN*     3.5    22.4    -      -       -      +
    332A  ALA*     4.0     9.2    -      -       +      +
    333A  CYS*     4.0    26.5    -      -       -      +
    336A  MET*     4.2    12.8    -      -       +      -
    384A  ALA      3.2    16.5    +      -       -      +
    385A  ALA*     3.1    15.3    +      -       -      +
    387A  VAL*     1.3    76.2    -      -       -      +
    389A  GLY*     1.3    61.8    +      -       -      +
    391A  HIS*     3.4     4.7    +      -       -      +
    392A  VAL*     3.4    24.4    +      -       -      +
    395B  THR*     3.7    16.8    -      -       +      +
    396B  VAL*     5.7     4.9    -      -       -      -
    399B  SER*     3.6    32.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 389 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    385A  ALA      3.2     8.9    +      -       -      -
    386A  GLN*     3.1     8.5    +      -       -      -
    388A  MET*     1.3    74.8    -      -       -      +
    390A  ASN*     1.3    65.7    +      -       -      +
    392A  VAL*     3.1     9.7    +      -       -      +
    393A  ALA*     3.1    20.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 390 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    325A  SER*     4.7     0.2    -      -       -      -
    386A  GLN*     2.8    49.8    +      -       -      +
    387A  VAL*     3.6     1.5    -      -       -      +
    389A  GLY*     1.3    72.2    -      -       -      +
    391A  HIS*     1.3    56.8    +      -       -      +
    393A  ALA*     3.1     4.7    +      -       -      +
    394A  VAL*     2.8    32.9    +      -       -      +
    415A  ASN*     3.2    28.8    -      -       +      +
    418A  HIS*     3.2    32.7    +      -       -      +
    419A  SER*     3.2    28.8    +      -       -      +
    422A  LEU*     4.9     0.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 391 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    322A  VAL*     3.7    11.2    -      -       +      -
    325A  SER*     2.9    34.7    +      -       -      +
    326A  GLY*     3.4    23.6    -      -       -      -
    329A  ASN*     3.9    21.3    -      -       +      +
    387A  VAL*     2.9    16.7    +      -       +      +
    388A  MET      3.6     5.8    -      -       -      +
    389A  GLY      3.2     0.2    -      -       -      -
    390A  ASN*     1.3    77.6    -      -       -      +
    392A  VAL*     1.3    62.7    +      -       +      +
    394A  VAL*     3.2     2.1    +      -       -      +
    395A  THR*     2.8    38.1    +      -       -      -
    326B  GLY*     5.3     1.3    -      -       -      -
    329B  ASN*     3.2    28.7    +      -       -      -
    391B  HIS*     3.3    32.3    +      +       -      -
----------------------------------------------------------
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Residues in contact with VAL 392 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    388A  MET      3.4    12.1    +      -       -      +
    389A  GLY*     3.1    11.5    +      -       -      +
    391A  HIS*     1.3    81.8    -      -       +      +
    393A  ALA*     1.3    59.1    +      -       -      +
    395A  THR*     3.1     9.1    +      -       -      -
    396A  VAL*     2.9    39.7    +      -       +      +
    388B  MET      5.8     0.4    -      -       -      +
    391B  HIS*     6.3     0.2    -      -       +      -
    392B  VAL*     3.4    32.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 393 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    389A  GLY      3.1    12.2    +      -       -      +
    390A  ASN*     3.1     8.5    +      -       -      +
    392A  VAL*     1.3    79.1    -      -       -      +
    394A  VAL*     1.3    62.4    +      -       -      +
    396A  VAL*     3.4     6.9    +      -       -      +
    397A  GLY      3.2    17.0    +      -       -      -
    411A  MET*     3.5    33.0    -      -       +      +
    415A  ASN*     3.8    14.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 394 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    321A  LEU*     4.0     4.9    -      -       +      +
    322A  VAL*     3.9    31.1    -      -       +      +
    325A  SER*     3.9    19.5    -      -       -      +
    390A  ASN      2.8    21.7    +      -       -      +
    391A  HIS      3.5     6.7    -      -       -      +
    393A  ALA*     1.3    72.1    -      -       -      +
    395A  THR*     1.3    58.1    +      -       -      +
    397A  GLY*     3.4     0.7    +      -       -      -
    398A  GLY*     2.9    26.5    +      -       -      -
    411A  MET*     4.7     0.7    -      -       -      -
    412A  MET*     3.6    33.7    -      -       +      +
    415A  ASN*     3.5    22.7    -      -       +      -
    416A  VAL*     4.0     9.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 395 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    322A  VAL*     4.4     2.5    -      -       -      +
    391A  HIS*     2.8    34.5    +      -       -      -
    392A  VAL*     3.1    10.4    +      -       +      -
    394A  VAL*     1.3    74.8    -      -       -      +
    396A  VAL*     1.3    64.2    +      -       +      +
    398A  GLY      3.4     0.2    +      -       -      -
    399A  SER*     3.1    21.0    +      -       -      -
    329B  ASN*     2.9    38.0    +      -       -      +
    333B  CYS*     3.4    24.2    -      -       -      -
    388B  MET*     3.7    22.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 396 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    392A  VAL*     2.9    32.4    +      -       +      +
    393A  ALA*     3.9     6.7    -      -       -      +
    395A  THR*     1.3    76.8    -      -       +      +
    397A  GLY*     1.3    61.5    +      -       -      +
    399A  SER*     2.9    22.0    +      -       -      +
    400A  ASN*     3.0    30.6    +      -       -      +
    408A  PHE*     5.6     4.0    -      -       +      -
    388B  MET*     5.6     5.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 397 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    393A  ALA      3.2    12.2    +      -       -      -
    394A  VAL      3.8     1.8    -      -       -      -
    396A  VAL*     1.3    80.9    -      -       -      +
    398A  GLY*     1.3    60.8    +      -       -      +
    399A  SER      3.2     0.7    +      -       -      -
    400A  ASN      3.2     7.3    +      -       -      -
    406A  ASN*     3.1    16.8    +      -       -      -
    408A  PHE*     3.8    35.3    -      -       -      +
    411A  MET*     4.6     2.2    -      -       -      -
    412A  MET*     3.7    11.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 398 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    317A  ALA*     5.0     5.5    -      -       -      +
    318A  HIS      5.1     3.1    +      -       -      -
    319A  ASP*     4.2     8.9    -      -       -      +
    322A  VAL*     4.1     8.5    -      -       -      -
    394A  VAL      2.9    14.8    +      -       -      -
    395A  THR      3.9     1.3    -      -       -      -
    397A  GLY*     1.3    75.5    -      -       -      +
    399A  SER*     1.3    58.8    +      -       -      +
    400A  ASN      3.4     0.4    +      -       -      -
    401A  GLY      4.4     0.9    +      -       -      -
    406A  ASN*     3.8    10.0    +      -       -      -
    412A  MET*     3.4    24.7    -      -       -      +
    333B  CYS*     4.0    14.8    -      -       -      +
    337B  LYS*     5.2     2.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 399 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    395A  THR      3.1    13.2    +      -       -      -
    396A  VAL*     2.9    19.9    +      -       -      +
    397A  GLY      3.1     0.2    -      -       -      -
    398A  GLY*     1.3    76.3    -      -       -      +
    400A  ASN*     1.3    66.1    +      -       -      +
    401A  GLY      3.5     3.5    +      -       -      +
    333B  CYS*     3.9    14.3    -      -       -      +
    336B  MET*     3.3    31.3    -      -       -      +
    337B  LYS*     3.9     9.2    +      -       -      -
    340B  ASN*     5.9     0.5    -      -       -      +
    388B  MET*     3.6    28.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 400 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    396A  VAL*     3.0    35.2    +      -       -      +
    397A  GLY      3.2     6.4    +      -       -      +
    399A  SER*     1.3    84.6    +      -       -      +
    401A  GLY*     1.3    65.0    +      -       -      +
    402A  HIS*     3.4    24.9    +      -       -      +
    406A  ASN*     4.2     1.1    -      -       -      -
    407A  VAL      5.2     0.3    +      -       -      -
    408A  PHE*     3.5    35.7    -      -       +      -
    336B  MET*     5.3     3.1    -      -       -      +
----------------------------------------------------------
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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