Contacts of the strand formed by residues 26 - 29 (chain A) in PDB entry 1S0L


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 LEU 26 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18A  LEU*     4.8     5.4    -      -       +      -
     19A  VAL      3.4    12.6    -      -       -      +
     20A  MET*     4.0    10.3    -      -       +      +
     25A  GLU*     1.3    78.4    -      -       -      +
     27A  LYS*     1.3    63.3    +      -       -      +
     40A  VAL*     3.7    31.6    -      -       +      -
     42A  TRP*     3.5    34.5    -      -       +      -
     62A  LEU*     5.6     1.3    -      -       +      -
     69A  LEU*     3.7    22.4    -      -       +      -
     80A  LEU*     5.6     0.4    -      -       +      -
     82A  LEU*     3.8    13.7    -      -       +      +
    131A  PRO*     3.2     6.9    -      -       -      +
    132A  VAL*     2.8    47.8    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 27 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17A  SER      3.7     0.3    -      -       -      +
     18A  LEU*     3.4     4.3    -      -       -      +
     19A  VAL*     2.8    46.4    +      -       +      +
     21A  SER*     3.4    36.6    +      -       -      +
     25A  GLU*     4.9     2.9    -      -       +      +
     26A  LEU*     1.3    79.9    -      -       -      +
     28A  ALA*     1.3    62.4    +      -       -      +
    129A  ASN*     3.1    51.2    +      -       -      +
    130A  MET      3.3    16.2    -      -       -      +
    131A  PRO*     4.1     7.9    -      -       +      -
    132A  VAL*     4.1     4.0    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 28 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12A  ASP*     4.7     0.2    -      -       -      +
     16A  LYS*     3.9    23.9    -      -       +      -
     17A  SER      3.1    10.1    -      -       -      +
     18A  LEU*     3.8    17.3    -      -       +      -
     27A  LYS*     1.3    75.0    -      -       -      +
     29A  LEU*     1.3    61.9    +      -       -      +
    124A  THR*     3.9    21.1    -      -       +      -
    125A  SER      5.7     0.4    -      -       -      +
    127A  ALA      4.4     0.3    -      -       -      +
    128A  GLU      4.1     0.2    -      -       -      -
    129A  ASN*     3.1    22.2    +      -       -      -
    130A  MET      3.1    13.2    +      -       -      +
    132A  VAL*     4.3     2.6    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 29 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16A  LYS*     3.8    10.9    -      -       -      +
     17A  SER*     2.8    28.4    +      -       -      +
     19A  VAL*     4.7    19.7    -      -       +      -
     27A  LYS*     5.9     0.7    -      -       +      -
     28A  ALA*     1.3    77.8    -      -       -      +
     30A  HIS*     1.3    65.3    +      -       -      +
     31A  LEU*     3.2    41.9    +      -       +      -
     38A  GLN*     6.0     1.6    -      -       -      +
    128A  GLU*     3.0    19.7    -      -       +      +
    129A  ASN*     3.4    27.8    -      -       +      +
----------------------------------------------------------
 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