Contacts of the strand formed by residues 38 - 41 (chain A) in PDB entry 3BRA


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 PHE 38 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18A  MET*     3.9    31.4    -      -       +      -
     20A  VAL*     3.9    22.0    -      -       +      -
     29A  ILE*     4.0    12.1    -      -       +      -
     36A  SER      4.1     1.4    +      -       -      -
     37A  ASN*     1.3    71.7    +      -       -      +
     39A  ALA*     1.3    57.9    +      -       -      +
     40A  VAL*     3.6    23.6    -      -       +      -
     85A  VAL*     4.1    16.8    -      -       +      -
     97A  ALA*     4.8     0.2    -      -       +      -
     98A  ASN      3.6    23.7    -      -       -      +
     99A  ILE*     3.5    25.6    -      -       +      -
    100A  ALA*     2.9    24.8    +      -       -      +
    118A  ILE      3.3    13.2    -      -       -      -
    119A  LEU*     3.9    19.7    -      -       +      -
    120A  GLY      4.3     1.9    +      -       -      +
    135A  PRO*     6.1     0.2    -      -       -      +
    136A  PHE*     4.5    19.9    -      +       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 39 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37A  ASN      3.6     1.3    +      -       -      +
     38A  PHE*     1.3    75.4    -      -       -      +
     40A  VAL*     1.3    63.0    +      -       -      +
     76A  TRP*     3.7    36.1    -      -       +      -
    100A  ALA*     3.3     9.0    -      -       +      +
    102A  ILE*     3.8    15.4    -      -       +      +
    117A  GLY*     3.1     1.2    -      -       -      -
    118A  ILE*     2.6    50.2    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 40 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20A  VAL*     5.3     0.7    -      -       +      -
     27A  LEU*     4.4    13.0    -      -       +      -
     29A  ILE*     3.8    14.1    -      -       +      -
     38A  PHE*     3.6    32.5    -      -       +      -
     39A  ALA*     1.3    81.5    -      -       -      +
     41A  GLY*     1.3    65.4    +      -       -      +
     52A  TYR*     3.5    41.1    -      -       +      -
     99A  ILE*     4.0    11.7    -      -       +      -
    100A  ALA      3.0     7.8    +      -       -      +
    101A  ALA*     3.8     1.1    -      -       -      -
    102A  ILE*     2.9    25.1    +      -       -      +
    116A  GLU*     3.7     8.3    -      -       +      +
    117A  GLY*     3.8     1.3    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 41 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27A  LEU*     5.5     0.2    -      -       -      +
     40A  VAL*     1.3    74.0    -      -       -      +
     42A  ALA*     1.3    51.9    +      -       -      -
     43A  ALA      3.7     1.8    -      -       -      -
     48A  LEU*     4.0    10.8    -      -       -      -
     51A  TYR*     3.3     7.9    -      -       -      +
     52A  TYR*     2.8    31.2    +      -       -      +
    102A  ILE*     4.1     4.7    -      -       -      -
    109A  PHE*     3.7    22.3    -      -       -      -
    116A  GLU*     2.7    21.2    +      -       -      +
----------------------------------------------------------
 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