Contacts of the strand formed by residues 164 - 168 (chain D) in PDB entry 2I6A


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 VAL 164 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8D  ILE      3.4     1.6    +      -       -      -
      9D  LEU*     3.3     9.3    -      -       +      +
     10D  PHE      2.9    23.9    +      -       -      -
    162D  ALA*     3.6     4.6    -      -       -      +
    163D  ARG*     1.3    86.9    -      -       +      +
    165D  CYS*     1.3    71.2    +      -       -      +
    192D  ILE*     3.5    17.0    -      -       +      +
    194D  THR*     4.4     4.7    -      -       +      -
    307D  LEU*     4.2    19.3    -      -       +      +
    310D  LEU*     3.5    35.2    -      -       +      +
    311D  VAL*     3.7    33.9    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with CYS 165 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9D  LEU*     4.8     0.2    -      -       -      -
     10D  PHE*     3.1    29.8    -      -       +      +
    159D  VAL*     4.7     8.5    -      -       -      -
    162D  ALA*     4.2    10.8    -      -       -      -
    164D  VAL*     1.3    79.5    -      -       -      +
    166D  TYR*     1.3    54.6    +      -       -      +
    167D  ILE*     5.4     0.4    -      -       +      -
    182D  VAL*     4.0    20.4    -      -       +      -
    185D  HIS*     5.8     4.3    -      -       -      -
    186D  ALA*     5.3     5.8    -      -       -      -
    191D  ARG*     5.6     4.7    -      -       -      -
    192D  ILE      2.8    13.9    +      -       -      +
    193D  PHE*     4.1    18.4    -      -       +      -
    194D  THR*     2.5    38.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 166 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9D  LEU*     4.6     4.0    -      -       +      +
     10D  PHE      2.8    10.7    +      -       -      +
     11D  GLY*     3.2    23.7    -      -       -      -
     65D  SER*     4.8     3.6    +      -       -      -
     66D  THR*     3.3    29.5    -      -       +      +
     69D  SER*     3.9    16.5    +      -       -      -
     70D  ILE*     5.0     3.6    -      -       +      -
    165D  CYS*     1.3    73.5    -      -       -      +
    167D  ILE*     1.3    70.6    +      -       -      +
    168D  ALA*     4.1    10.2    -      -       -      +
    194D  THR*     3.0    29.6    -      -       -      +
    195D  LEU      4.0     3.8    -      -       -      -
    196D  ASN*     2.9    39.6    +      -       +      +
    221D  PHE*     3.7    24.0    -      +       -      -
    300D  ASP*     5.5     0.3    +      -       -      -
    303D  VAL*     3.4    17.9    -      -       +      +
    307D  LEU*     3.7    30.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 167 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10D  PHE*     4.8     2.2    -      -       +      -
     12D  MET*     3.2    47.6    -      -       +      +
     66D  THR*     4.1     0.2    -      -       -      -
    165D  CYS*     5.4     0.2    -      -       +      -
    166D  TYR*     1.3    85.8    -      -       -      +
    168D  ALA*     1.3    75.8    +      -       -      +
    171D  PHE*     3.7    20.6    -      -       +      -
    179D  VAL*     4.0    19.5    -      -       +      -
    182D  VAL*     4.2    11.4    -      -       +      -
    193D  PHE*     4.0    27.4    -      -       +      -
    194D  THR      3.1     7.1    +      -       -      -
    195D  LEU*     3.2    35.5    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 168 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65D  SER*     4.2    12.8    -      -       -      +
     66D  THR*     2.8    35.4    +      -       -      +
    166D  TYR*     4.1    10.6    -      -       -      +
    167D  ILE*     1.3    82.8    -      -       -      +
    169D  GLY*     1.3    59.4    +      -       -      +
    170D  PHE*     2.9    16.5    +      -       +      +
    171D  PHE*     3.1    12.1    +      -       +      +
    172D  LEU*     4.4     0.9    +      -       -      +
    195D  LEU*     4.6     1.0    -      -       -      +
    196D  ASN*     3.9     8.3    -      -       -      -
    198D  SER*     3.4    13.5    -      -       -      +
----------------------------------------------------------
 Back to top of page


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