Contacts of the strand formed by residues 171 - 173 (chain C) in PDB entry 6P19


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 171 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    159C  SER*     3.7     5.0    -      -       -      -
    160C  ASP*     3.1    38.1    +      -       -      +
    163C  LYS*     4.0    35.4    -      -       +      +
    164C  THR*     4.3     7.2    -      -       +      -
    169C  LYS*     3.3    24.2    -      -       +      +
    170C  VAL*     1.3    76.4    -      -       -      +
    172C  TYR*     1.3    64.8    +      -       -      +
    173C  ASN*     3.3     7.8    +      -       -      +
    187C  GLU*     6.3     1.3    -      -       +      -
    188C  PHE*     4.1    20.4    -      -       +      +
    189C  ASP*     4.0    11.0    -      -       -      +
    190C  PRO*     3.7    34.1    -      -       +      -
    436C  ARG*     6.5     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 172 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    157C  PHE*     6.3     1.1    -      -       +      -
    158C  ASP      3.3     9.9    -      -       -      +
    159C  SER*     3.6    18.2    -      -       -      -
    169C  LYS*     5.6     0.7    -      -       -      -
    170C  VAL*     3.3    37.3    -      -       +      +
    171C  LEU*     1.3    70.9    -      -       -      +
    173C  ASN*     1.3    59.2    +      -       -      +
    187C  GLU*     4.1     1.3    -      -       -      -
    188C  PHE*     3.2    29.6    +      +       -      -
    432C  LEU*     3.8    11.3    -      -       +      +
    435C  ILE*     3.5    41.6    +      -       +      -
    436C  ARG*     3.7    44.4    +      -       +      -
    442C  VAL*     4.8     7.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 173 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    156C  PHE      4.0     0.5    -      -       -      +
    157C  PHE*     4.8     0.7    -      -       -      -
    158C  ASP*     2.8    48.2    +      -       -      +
    159C  SER*     3.4     6.9    +      -       -      -
    160C  ASP*     4.1    14.3    +      -       -      +
    171C  LEU*     3.9     7.0    -      -       +      +
    172C  TYR*     1.3    75.1    -      -       -      +
    174C  ALA*     1.3    65.8    +      -       -      +
    175C  ARG*     4.6    15.9    +      -       -      +
    186C  PHE      3.3     4.9    -      -       -      +
    187C  GLU*     3.6    30.1    +      -       +      +
    432C  LEU*     4.8     1.1    -      -       -      -
----------------------------------------------------------
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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