Contacts of the strand formed by residues 280 - 285 (chain A) in PDB entry 4PS1


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 GLU 280 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    232A  PRO*     3.9    26.3    -      -       +      +
    234A  GLY      3.0    13.4    +      -       -      +
    235A  TYR*     3.4    18.5    -      -       +      -
    236A  CYS      2.9    23.4    +      -       -      -
    279A  PHE*     1.3    70.5    -      -       -      +
    281A  ILE*     1.3    64.8    +      -       -      +
    282A  LYS*     3.1    38.3    +      -       -      +
    307A  MET*     5.3     0.3    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 281 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    236A  CYS*     3.5    18.4    -      -       +      +
    238A  ILE*     3.6    30.7    -      -       +      -
    271A  THR*     3.7    25.8    -      -       +      +
    274A  PHE*     3.7    31.6    -      -       +      -
    275A  GLU*     3.6    38.5    +      -       +      +
    279A  PHE*     3.9     5.6    -      -       +      +
    280A  GLU*     1.3    76.3    -      -       -      +
    282A  LYS*     1.3    68.7    +      -       -      +
    283A  PRO*     3.5    17.3    -      -       +      +
    294B  GLU*     4.5     4.0    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 282 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    235A  TYR*     3.8    20.2    -      -       +      -
    236A  CYS      2.9     9.1    +      -       -      -
    237A  LEU*     3.4    16.0    -      -       +      -
    238A  ILE      2.9    21.5    +      -       -      -
    280A  GLU*     3.1    42.3    +      -       -      +
    281A  ILE*     1.3    78.3    -      -       -      +
    283A  PRO*     1.3    63.6    -      -       +      +
    284A  HIS*     3.2    16.2    -      -       +      +
    299A  TYR*     3.2    28.7    -      -       +      +
    297B  LYS*     6.4     0.8    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PRO 283 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    238A  ILE*     3.5    19.5    -      -       +      +
    240A  ASN*     6.2     0.7    -      -       +      -
    267A  ALA*     6.3     2.7    -      -       +      -
    271A  THR*     5.6     2.0    -      -       -      +
    281A  ILE*     3.5    17.5    -      -       +      +
    282A  LYS*     1.3    87.7    -      -       +      +
    284A  HIS*     1.3    70.5    +      -       -      +
    285A  ASP*     4.2     9.4    -      -       -      +
    294B  GLU*     3.5    43.0    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 284 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    237A  LEU*     5.0     2.9    -      -       +      -
    238A  ILE      2.8     8.6    +      -       -      +
    239A  ILE*     3.5    19.9    -      -       +      -
    240A  ASN      2.8    25.5    +      -       -      -
    282A  LYS*     3.2    34.9    +      -       +      +
    283A  PRO*     1.3    78.3    +      -       -      +
    285A  ASP*     1.3    63.4    +      -       -      +
    287A  CYS*     3.6    19.9    -      -       -      -
    291A  GLN*     5.3     1.1    +      -       -      +
    295A  ILE*     3.4    28.3    -      -       +      +
    299A  TYR*     4.2    15.6    +      +       -      -
    294B  GLU      6.1     0.2    -      -       -      -
    298B  ILE*     3.6    42.0    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 285 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    240A  ASN*     3.3    35.2    +      -       -      +
    267A  ALA*     5.7     0.2    -      -       -      +
    283A  PRO*     5.0     7.4    -      -       -      +
    284A  HIS*     1.3    77.8    +      -       -      +
    286A  ASP*     1.3    79.0    -      -       -      +
    287A  CYS*     3.6     3.9    -      -       -      -
    291A  GLN*     4.7     2.3    -      -       -      +
    284B  HIS*     3.6    30.9    +      -       -      +
    291B  GLN*     4.3    15.9    +      -       -      -
    295B  ILE*     6.1     0.5    -      -       -      +
----------------------------------------------------------
 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