Contacts of the helix formed by residues 3939 - 3964 (chain D) in PDB entry 6X34


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 GLU3939 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   3846D  ASN*     5.8     2.7    -      -       -      +
   3932D  TYR*     3.6    28.9    -      -       +      +
   3937D  VAL*     4.2     1.6    +      -       -      +
   3938D  ILE*     1.3    83.9    -      -       -      +
   3940D  GLU*     1.3    64.6    +      -       -      +
   3941D  GLN*     4.3     4.9    -      -       +      +
   3942D  GLY*     3.4     9.0    +      -       -      +
   3943D  LYS*     3.3    17.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU3940 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   3938D  ILE      3.7     2.2    +      -       -      -
   3939D  GLU*     1.3    71.7    -      -       -      +
   3941D  GLN*     1.3    70.4    +      -       +      +
   3943D  LYS*     3.3    15.6    +      -       -      +
   3944D  ARG*     3.5    11.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN3941 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   3842D  PHE*     4.5     2.2    -      -       +      -
   3846D  ASN*     3.9    27.1    -      -       -      +
   3939D  GLU*     3.3     4.4    -      -       +      +
   3940D  GLU*     1.3    81.0    -      -       +      +
   3942D  GLY*     1.3    62.2    +      -       -      +
   3944D  ARG*     3.4    37.8    +      -       -      +
   3945D  ASN*     3.1    20.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY3942 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   3842D  PHE*     3.8    24.1    -      -       -      -
   3928D  PHE*     3.5    19.9    -      -       -      -
   3932D  TYR*     4.6     5.8    -      -       -      -
   3938D  ILE*     5.4     1.1    -      -       -      -
   3939D  GLU*     3.4    10.7    +      -       -      +
   3940D  GLU      3.3     0.2    -      -       -      -
   3941D  GLN*     1.3    76.4    -      -       -      +
   3943D  LYS*     1.3    60.6    +      -       -      +
   3945D  ASN*     3.6     0.9    +      -       -      +
   3946D  PHE*     3.1    29.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS3943 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   3938D  ILE*     4.9     6.0    -      -       +      +
   3939D  GLU      3.3    12.8    +      -       -      +
   3940D  GLU*     3.6    12.1    -      -       -      +
   3941D  GLN      3.2     0.6    -      -       -      -
   3942D  GLY*     1.3    76.0    -      -       -      +
   3944D  ARG*     1.3    58.3    +      -       -      +
   3946D  PHE*     4.0     2.0    -      -       -      +
   3947D  SER*     3.1    28.1    +      -       -      -
   4004D  GLN*     6.5     1.1    -      -       +      -
   4007D  LEU*     3.8    29.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG3944 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   3867D  GLU*     4.9    17.8    -      -       -      +
   3869D  VAL*     5.1     3.6    -      -       -      +
   3940D  GLU      3.5     7.6    +      -       -      +
   3941D  GLN*     3.4    29.9    +      -       -      +
   3942D  GLY      3.3     0.8    -      -       -      -
   3943D  LYS*     1.3    76.9    -      -       -      +
   3945D  ASN*     1.3    92.5    +      -       -      +
   3947D  SER*     3.4     7.0    +      -       -      -
   3948D  LYS*     3.2    22.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN3945 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   3842D  PHE*     3.2    21.6    -      -       +      -
   3867D  GLU*     6.1     1.0    -      -       -      +
   3869D  VAL*     3.4    45.0    -      -       +      +
   3870D  MET*     4.8    10.2    -      -       +      +
   3928D  PHE*     5.8     2.5    -      -       +      -
   3941D  GLN*     3.1    18.5    +      -       -      +
   3942D  GLY      3.6     4.9    +      -       -      +
   3944D  ARG*     1.3   103.0    +      -       -      +
   3946D  PHE*     1.3    58.4    +      -       -      +
   3948D  LYS*     3.5     6.0    +      -       -      +
   3949D  ALA*     3.1    27.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE3946 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   3925D  ILE*     3.7    29.8    -      -       +      -
   3928D  PHE*     3.9    30.0    -      +       +      -
   3942D  GLY      3.1    19.1    +      -       -      +
   3943D  LYS*     4.0     5.2    -      -       -      +
   3944D  ARG      3.3     0.2    -      -       -      -
   3945D  ASN*     1.3    75.9    -      -       -      +
   3947D  SER*     1.3    62.8    +      -       -      +
   3949D  ALA*     3.3     9.0    +      -       +      +
   3950D  MET*     2.8    39.2    +      -       +      +
   3991D  PHE*     5.4     4.3    -      +       -      -
   3994D  MET*     3.5    27.1    -      -       +      -
   4007D  LEU*     4.0    24.9    -      -       +      -
   4011D  LEU*     3.5    27.8    -      -       +      -
   4014D  LEU*     6.2     3.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER3947 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   3943D  LYS      3.1    18.9    +      -       -      -
   3944D  ARG*     3.7     6.7    -      -       -      -
   3945D  ASN      3.4     0.2    -      -       -      -
   3946D  PHE*     1.3    80.5    -      -       -      +
   3948D  LYS*     1.3    59.4    +      -       -      +
   3950D  MET*     3.4     8.1    +      -       -      +
   3951D  SER*     3.0    25.8    +      -       -      -
   4007D  LEU*     6.1     2.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS3948 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   3870D  MET*     4.8    13.5    -      -       +      -
   3873D  ASP*     5.6    10.5    -      -       +      -
   3944D  ARG      3.2    13.2    +      -       -      +
   3945D  ASN*     3.8    10.3    -      -       -      +
   3946D  PHE      3.3     0.4    -      -       -      -
   3947D  SER*     1.3    76.8    +      -       -      +
   3949D  ALA*     1.3    61.7    +      -       -      +
   3951D  SER*     3.3    16.7    +      -       -      -
   3952D  VAL*     3.3    17.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA3949 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   3837D  LEU*     5.3     9.0    -      -       +      -
   3870D  MET*     4.7    18.5    -      -       +      +
   3921D  LEU*     5.4     6.7    -      -       +      +
   3925D  ILE*     5.1    15.1    -      -       +      +
   3945D  ASN      3.1    17.7    +      -       -      +
   3946D  PHE*     3.3    11.0    +      -       +      +
   3948D  LYS*     1.3    74.0    -      -       -      +
   3950D  MET*     1.3    60.4    +      -       -      +
   3952D  VAL*     3.3    10.5    +      -       -      +
   3953D  ALA*     2.9    28.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET3950 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   3925D  ILE*     6.3     0.4    -      -       -      -
   3946D  PHE*     2.8    32.4    +      -       +      +
   3947D  SER*     3.6     9.9    -      -       -      +
   3948D  LYS      3.2     0.4    -      -       -      -
   3949D  ALA*     1.3    75.2    -      -       -      +
   3951D  SER*     1.3    59.9    +      -       -      +
   3953D  ALA*     3.3     7.5    +      -       -      +
   3954D  LYS*     2.9    30.7    +      -       -      +
   4010D  GLU*     5.2    15.7    -      -       +      +
   4011D  LEU*     5.9     2.2    -      -       -      -
   4014D  LEU*     5.2    13.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER3951 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   3947D  SER*     3.0    15.5    +      -       -      -
   3948D  LYS*     3.3     9.9    +      -       -      -
   3949D  ALA      3.3     0.4    -      -       -      -
   3950D  MET*     1.3    79.7    -      -       -      +
   3952D  VAL*     1.3    60.8    +      -       -      +
   3954D  LYS*     3.4    10.3    +      -       -      +
   3955D  GLN*     3.3    28.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL3952 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   3870D  MET*     4.9    13.9    -      -       +      -
   3872D  ASP      5.9     1.6    -      -       -      +
   3873D  ASP*     6.0     5.2    -      -       -      -
   3876D  THR*     3.7    29.4    -      -       +      +
   3877D  GLN*     5.6     8.7    -      -       +      +
   3880D  PHE*     5.3     3.3    -      -       +      -
   3917D  TYR*     3.5    28.7    -      -       +      +
   3921D  LEU*     4.9     4.9    -      -       +      -
   3948D  LYS      3.3    16.8    -      -       -      +
   3949D  ALA*     3.3    10.7    +      -       -      +
   3950D  MET      3.3     0.2    -      -       -      -
   3951D  SER*     1.3    77.0    -      -       -      +
   3953D  ALA*     1.3    61.4    +      -       -      +
   3954D  LYS      3.4     0.5    +      -       -      -
   3955D  GLN*     3.5     4.1    +      -       -      +
   3956D  VAL*     3.3    23.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA3953 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   3921D  LEU*     4.1    16.5    -      -       +      +
   3925D  ILE*     4.4    13.5    -      -       +      -
   3949D  ALA      2.9    17.4    +      -       -      +
   3950D  MET*     3.3     6.7    +      -       -      +
   3952D  VAL*     1.3    76.1    -      -       -      +
   3954D  LYS*     1.3    58.5    +      -       -      +
   3956D  VAL*     3.3    11.8    -      -       -      +
   3957D  PHE*     3.1    31.4    -      -       +      -
   3987D  PHE*     5.8     2.2    -      -       +      -
   4014D  LEU*     3.4    22.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS3954 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   3950D  MET      2.9    17.2    +      -       -      +
   3951D  SER*     3.7     9.9    -      -       -      +
   3952D  VAL      3.2     0.4    -      -       -      -
   3953D  ALA*     1.3    77.9    -      -       -      +
   3955D  GLN*     1.3    71.7    +      -       +      +
   3956D  VAL      3.5     0.2    +      -       -      -
   3957D  PHE*     3.6     4.9    +      -       -      +
   3958D  ASN*     3.0    35.1    +      -       -      +
   4013D  ASP*     5.2    14.5    -      -       +      +
   4014D  LEU*     4.2    12.3    -      -       +      -
   4016D  LYS*     5.6     4.0    -      -       -      +
   4017D  ASP*     3.5    28.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN3955 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   3877D  GLN*     5.0    19.5    -      -       +      +
   3880D  PHE*     4.6    14.0    -      -       +      +
   3881D  ARG*     3.6    36.7    +      -       -      +
   3884D  GLN*     5.4     1.6    -      -       -      +
   3951D  SER      3.3    16.1    +      -       -      +
   3952D  VAL*     3.5     4.2    +      -       -      +
   3954D  LYS*     1.3    86.0    -      -       +      +
   3956D  VAL*     1.3    63.9    +      -       -      +
   3958D  ASN*     2.8    42.0    +      -       -      +
   3959D  SER*     3.5    11.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL3956 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   3880D  PHE*     4.4    21.2    -      -       +      +
   3914D  THR*     5.2     2.2    -      -       +      +
   3917D  TYR*     4.3    16.6    -      -       +      -
   3918D  LEU*     3.8    35.9    -      -       +      -
   3921D  LEU*     4.3     9.9    -      -       +      -
   3952D  VAL      3.3    14.6    +      -       -      +
   3953D  ALA*     3.3    22.9    -      -       -      +
   3955D  GLN*     1.3    77.6    -      -       -      +
   3957D  PHE*     1.3    69.9    +      -       +      +
   3959D  SER*     2.3    37.7    +      -       -      +
   3960D  LEU*     3.1     9.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE3957 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   3918D  LEU*     3.9    20.6    -      -       +      -
   3921D  LEU*     6.3     0.2    -      -       +      -
   3953D  ALA*     3.1    26.2    -      -       +      +
   3954D  LYS      3.6     7.3    +      -       -      +
   3955D  GLN      3.4     0.4    -      -       -      -
   3956D  VAL*     1.3    84.7    -      -       +      +
   3958D  ASN*     1.3    61.4    +      -       -      +
   3959D  SER      3.1     0.7    +      -       -      -
   3960D  LEU*     3.6    13.4    +      -       +      +
   3961D  THR*     3.3    22.2    +      -       -      +
   3983D  ALA*     5.7     1.8    -      -       +      -
   3984D  VAL*     4.6    12.8    -      -       +      -
   3987D  PHE*     3.6    38.6    -      +       -      -
   4014D  LEU*     3.9    16.6    -      -       +      -
   4017D  ASP*     4.3    20.8    -      -       +      +
   4018D  MET*     3.7    31.6    -      -       +      -
   4021D  MET*     5.3     9.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN3958 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   3881D  ARG*     5.3     4.1    -      -       -      +
   3884D  GLN*     4.3     6.8    -      -       +      +
   3954D  LYS*     3.0    29.1    +      -       -      +
   3955D  GLN*     2.8    38.2    +      -       -      +
   3956D  VAL      3.1     0.8    -      -       -      -
   3957D  PHE*     1.3    77.4    -      -       -      +
   3959D  SER*     1.3    57.0    +      -       -      +
   3961D  THR*     3.3    13.5    -      -       +      +
   3962D  GLU*     3.2    26.7    -      -       -      +
   4017D  ASP*     4.1    18.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER3959 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   3880D  PHE*     4.5    17.0    -      -       -      -
   3883D  LEU*     5.8     0.7    -      -       -      -
   3884D  GLN*     4.1    18.6    -      -       -      +
   3914D  THR*     4.7     5.9    -      -       -      +
   3955D  GLN      3.5     8.1    +      -       -      -
   3956D  VAL*     2.3    33.2    +      -       -      +
   3958D  ASN*     1.3    78.4    -      -       -      +
   3960D  LEU*     1.3    68.8    +      -       -      +
   3961D  THR      3.3     0.4    -      -       -      -
   3962D  GLU*     3.5     2.1    +      -       -      +
   3963D  TYR*     3.2    44.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU3960 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   3914D  THR*     5.0     9.2    -      -       +      -
   3915D  VAL*     3.7    30.3    -      -       +      -
   3918D  LEU*     4.1    26.9    -      -       +      -
   3956D  VAL*     3.1    28.9    -      -       +      +
   3957D  PHE*     3.6    19.5    +      -       +      +
   3959D  SER*     1.3    83.7    +      -       -      +
   3961D  THR*     1.3    63.2    +      -       -      +
   3963D  TYR*     3.3    20.8    +      -       +      +
   3964D  ILE*     3.5    12.8    +      -       -      +
   3975D  LEU*     4.1    27.3    -      -       +      +
   3980D  LEU*     4.9     5.8    -      -       +      -
   4021D  MET*     5.9     5.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR3961 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   3957D  PHE      3.3    18.6    +      -       -      +
   3958D  ASN*     3.3    20.4    -      -       +      +
   3960D  LEU*     1.3    78.3    -      -       -      +
   3962D  GLU*     1.3    63.1    +      -       +      +
   3964D  ILE*     3.1     5.4    +      -       -      +
   3965D  GLN*     2.8    49.1    +      -       -      +
   4017D  ASP      5.5     3.1    -      -       -      +
   4020D  VAL*     4.9    10.5    +      -       +      +
   4021D  MET*     4.7    16.1    -      -       -      +
   4024D  SER*     3.5    17.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU3962 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   3884D  GLN*     4.0    25.8    -      -       +      +
   3887D  CYS*     3.2    34.7    -      -       +      +
   3888D  GLU*     3.9    10.5    -      -       -      +
   3890D  HIS*     4.0     7.5    +      -       -      -
   3895D  GLN*     6.0     0.3    -      -       -      +
   3958D  ASN      3.2    20.9    -      -       -      +
   3959D  SER*     3.5     6.4    +      -       -      +
   3960D  LEU      3.3     0.8    -      -       -      -
   3961D  THR*     1.3    80.1    -      -       +      +
   3963D  TYR*     1.3    66.1    +      -       +      +
   3964D  ILE      3.5     0.5    +      -       -      -
   3965D  GLN*     3.6    32.1    +      -       -      +
   4999D  THR*     4.6    14.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR3963 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   3883D  LEU*     3.4    47.3    +      -       -      +
   3884D  GLN*     5.0     2.5    -      -       -      -
   3887D  CYS*     5.1    12.8    -      -       +      -
   3895D  GLN*     4.8     9.6    -      -       +      +
   3898D  LEU*     4.2    23.3    -      -       +      +
   3910D  ILE*     5.5     2.0    -      -       +      +
   3911D  ILE*     3.7    24.9    -      -       +      -
   3914D  THR*     4.3    21.4    +      -       +      +
   3959D  SER*     3.2    29.8    -      -       -      -
   3960D  LEU*     3.3    13.0    +      -       +      +
   3961D  THR      3.2     0.6    -      -       -      -
   3962D  GLU*     1.3    81.2    -      -       +      +
   3964D  ILE*     1.3    57.7    +      -       +      +
   3965D  GLN      3.6     0.8    +      -       -      -
   3968D  CYS*     3.7     5.2    -      -       -      +
   3971D  ASN*     3.1    40.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE3964 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   3960D  LEU      3.5     9.3    +      -       -      +
   3961D  THR*     3.1     8.0    +      -       -      +
   3963D  TYR*     1.3    76.8    -      -       +      +
   3965D  GLN*     1.3    66.1    +      -       -      +
   3966D  GLY      3.6     6.2    -      -       -      +
   3968D  CYS*     3.6    18.1    -      -       -      -
   3971D  ASN*     4.6     8.7    -      -       +      +
   3972D  GLN*     5.2     5.6    -      -       +      -
   3975D  LEU*     5.5     8.1    -      -       +      -
   4021D  MET      6.0     0.7    -      -       -      +
   4024D  SER*     3.2    25.9    -      -       -      +
   4025D  LEU*     5.1     9.2    -      -       +      -
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

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

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