Contacts of the strand formed by residues 151 - 155 (chain A) in PDB entry 1QNB


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 151 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130A  LEU*     3.3    40.9    -      -       +      +
    133A  LEU*     3.8    20.4    -      -       +      -
    134A  ALA*     3.8    11.4    -      -       +      +
    141A  SER*     3.7    17.9    -      -       -      +
    142A  SER      3.6     4.7    -      -       -      +
    143A  TYR*     3.9    21.1    -      -       +      -
    150A  GLY*     1.3    73.3    -      -       -      -
    152A  ILE*     1.3    77.9    +      -       -      +
    153A  TYR*     3.8    13.7    -      -       +      +
    162A  LEU      3.5     1.7    -      -       -      +
    163A  LEU*     3.3     6.8    -      -       -      -
    164A  ILE*     2.8    44.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 152 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140A  PHE      3.2     2.3    -      -       -      +
    141A  SER*     3.2     6.4    -      -       -      -
    142A  SER*     2.8    49.8    +      -       -      +
    148A  PHE*     4.3    15.7    -      -       +      -
    150A  GLY      4.2     8.3    -      -       -      +
    151A  LEU*     1.3    76.1    -      -       -      +
    153A  TYR*     1.3    60.9    +      -       -      +
    154A  ARG*     3.6    31.8    -      -       +      +
    161A  VAL*     3.9    18.6    -      -       +      -
    162A  LEU      3.8     1.3    -      -       -      -
    163A  LEU*     3.4    25.6    -      -       +      -
    204C    A      4.7     6.1    -      -       -      +
    205C    T      3.9    21.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 153 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133A  LEU*     4.3    12.8    -      -       +      -
    137A  HIS*     3.4    38.7    +      +       +      -
    140A  PHE*     3.4    35.3    -      +       +      -
    141A  SER*     3.6    14.8    -      -       -      -
    151A  LEU*     3.8     3.3    +      -       +      -
    152A  ILE*     1.3    72.1    -      -       -      +
    154A  ARG*     1.3    61.8    +      -       -      +
    155A  MET*     3.4    30.8    +      -       +      +
    161A  VAL*     3.4     2.2    -      -       -      -
    162A  LEU*     2.8    51.8    +      -       +      +
    164A  ILE*     4.0    15.9    -      -       +      -
    188A  ILE*     3.8    29.6    -      -       +      -
    191A  VAL*     5.2     2.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 154 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140A  PHE*     2.9    32.5    +      -       -      +
    142A  SER*     3.7    18.0    +      -       -      -
    152A  ILE*     3.6    21.8    -      -       +      +
    153A  TYR*     1.3    73.2    -      -       -      +
    155A  MET*     1.3    65.6    +      -       -      +
    156A  LYS*     3.2    22.1    -      -       -      +
    160A  ILE      3.9     3.4    -      -       -      -
    161A  VAL*     3.8    17.0    -      -       +      +
    205C    T      2.8    35.5    +      -       -      -
    206C    A      3.4    27.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 155 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140A  PHE*     4.7     2.0    -      -       +      -
    153A  TYR*     3.4    25.9    +      -       +      +
    154A  ARG*     1.3    74.0    -      -       -      +
    156A  LYS*     1.3    69.8    +      -       -      +
    157A  VAL      3.7    22.9    -      -       -      +
    158A  PRO*     3.1    18.4    -      -       -      +
    159A  LYS*     3.3     4.9    -      -       -      +
    160A  ILE      2.8    29.3    +      -       -      +
    162A  LEU*     3.9    17.7    -      -       +      -
    184A  ALA*     3.4    37.7    -      -       -      +
    187A  ASN*     3.6    23.6    -      -       +      -
    188A  ILE*     4.0    11.4    -      -       +      +
----------------------------------------------------------
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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