Contacts of the strand formed by residues 145 - 147 (chain A) in PDB entry 4Q8E


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 THR 145 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142A  LEU*     3.4    30.7    +      -       +      +
    144A  SER*     1.3    75.9    -      -       -      +
    146A  TYR*     1.3    75.3    +      -       -      +
    147A  ILE*     3.9    19.0    +      -       +      -
    167A  ARG*     2.9    25.8    +      -       -      +
    171A  LEU*     4.6     9.6    -      -       +      +
    194A  ALA*     4.6     9.9    -      -       +      -
    198A  GLU*     2.7    20.6    +      -       -      -
    216A  ILE*     5.9     0.2    -      -       +      -
    235A  GLN*     2.9    25.0    +      -       +      +
    237A  LEU*     4.6     4.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 146 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145A  THR*     1.3    76.6    -      -       -      +
    147A  ILE*     1.3    65.6    +      -       -      +
    148A  GLU*     3.8     0.7    -      -       -      -
    150A  LEU      5.9     2.9    -      -       -      -
    163A  LYS*     3.2    43.9    +      -       +      +
    164A  GLU*     5.1     1.4    +      -       -      -
    166A  MET*     5.4     1.6    -      -       +      -
    167A  ARG*     3.5    48.1    -      -       +      +
    230A  ASN*     3.4    47.8    -      -       +      +
    234A  ARG*     3.9    30.0    +      -       +      -
    235A  GLN      2.8    13.9    +      -       -      +
    236A  THR*     3.4     3.8    -      -       +      +
    237A  LEU      2.8    26.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 147 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142A  LEU*     5.8     0.9    -      -       +      -
    145A  THR*     3.9    16.8    -      -       +      -
    146A  TYR*     1.3    81.6    -      -       -      +
    148A  GLU*     1.3    69.0    +      -       -      +
    149A  GLY      3.3     0.2    +      -       -      -
    150A  LEU*     3.1    39.2    +      -       +      +
    167A  ARG      5.6     1.0    +      -       -      -
    170A  GLY*     4.4     4.2    -      -       -      +
    171A  LEU*     4.0    24.2    -      -       +      +
    174A  TRP*     3.7    61.0    -      -       +      -
    237A  LEU*     3.8    24.7    -      -       +      +
    239A  SER*     5.9     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