Contacts of the strand formed by residues 268 - 271 (chain A) in PDB entry 1HK8


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 ASP 268 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    233A  LYS*     4.7     3.1    +      -       -      +
    234A  LEU      3.0     9.8    +      -       -      +
    235A  VAL*     3.2     5.9    -      -       +      +
    236A  MET      2.9    23.4    +      -       -      -
    265A  MET      5.0     1.2    -      -       -      +
    266A  TYR*     3.5    22.6    -      -       -      +
    267A  PRO*     1.3    76.8    -      -       -      +
    269A  ILE*     1.3    61.2    +      -       -      +
    505A  ILE*     4.2     6.6    -      -       -      +
    507A  TYR*     5.3     0.2    +      -       -      -
    533A  TYR*     3.1    37.6    +      -       +      +
    534A  PHE      3.4    11.9    -      -       -      +
    535A  GLY*     3.7    10.0    -      -       -      -
    577A  ARG*     3.1    32.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 269 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    235A  VAL*     4.1     1.6    -      -       -      -
    236A  MET*     3.2    17.0    -      -       +      +
    238A  VAL*     4.2    26.2    -      -       +      -
    267A  PRO*     4.2     0.4    -      -       +      +
    268A  ASP*     1.3    79.5    -      -       -      +
    270A  ILE*     1.3    62.8    +      -       -      +
    271A  SER      5.5     0.4    -      -       -      +
    524A  TRP*     3.8    76.9    -      -       +      +
    527A  ALA*     4.9     1.1    -      -       +      -
    528A  ALA*     4.6     4.3    -      -       +      +
    532A  ASP      4.0     0.2    -      -       -      +
    533A  TYR*     3.5     2.9    -      -       -      -
    534A  PHE*     2.8    55.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 270 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    235A  VAL*     3.7    13.9    -      -       +      +
    236A  MET      3.1     6.5    +      -       -      -
    237A  PHE*     3.5    29.0    -      -       +      -
    238A  VAL*     3.0    28.7    +      -       -      +
    269A  ILE*     1.3    72.7    -      -       -      +
    271A  SER*     1.3    65.2    +      -       -      +
    272A  ALA      3.2     0.9    +      -       -      -
    275A  ASN*     3.5    20.2    -      -       +      +
    285A  VAL      4.1     1.1    -      -       -      +
    287A  PRO*     3.7    30.7    -      -       +      -
    293A  PHE*     4.0    16.2    -      -       +      -
    532A  ASP*     3.3    22.0    -      -       -      +
    533A  TYR*     3.6    25.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 271 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    238A  VAL*     3.9    11.0    +      -       -      +
    269A  ILE*     4.3     1.2    -      -       -      +
    270A  ILE*     1.3    69.6    -      -       -      +
    272A  ALA*     1.3    58.7    +      -       -      +
    273A  LYS*     3.7     6.2    +      -       -      +
    274A  ASN*     3.2    16.4    +      -       -      -
    275A  ASN*     2.8    29.3    +      -       -      +
    528A  ALA*     2.7    38.3    +      -       -      +
    531A  LEU      3.2    19.3    -      -       -      -
    532A  ASP*     2.8    10.1    +      -       -      +
----------------------------------------------------------
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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