Contacts of the strand formed by residues 169 - 173 (chain A) in PDB entry 2QDC


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 169 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167A  VAL*     3.4     6.9    -      -       -      +
    168A  SER*     1.3    84.0    +      -       -      +
    170A  ILE*     1.3    65.1    +      -       -      +
    171A  VAL*     4.4     2.9    -      -       +      -
    227A  LYS*     3.3    40.4    -      -       +      +
    229A  ILE*     3.8    20.2    -      -       +      -
    253A  VAL*     3.9    31.4    -      -       +      +
    256A  SER*     4.1    15.9    -      -       -      +
    265A  PRO      5.1     1.0    +      -       -      -
    266A  ILE*     3.6    35.1    -      -       +      +
    267A  VAL      3.0    24.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 170 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158A  PHE*     4.0    15.7    -      -       +      -
    159A  TRP*     4.0    26.7    -      -       +      -
    162A  VAL*     4.2     3.6    -      -       +      -
    167A  VAL*     4.1    10.8    -      -       +      -
    169A  LEU*     1.3    78.9    -      -       -      +
    171A  VAL*     1.3    62.2    +      -       -      +
    186A  TYR*     3.5    20.6    -      -       -      +
    215A  LEU*     5.2     0.2    -      -       +      -
    226A  VAL*     3.8    24.0    -      -       +      -
    227A  LYS      2.9     8.1    +      -       -      +
    228A  HIS*     3.4    18.9    -      -       +      +
    229A  ILE*     2.8    31.7    +      -       -      +
    267A  VAL*     3.3    16.4    -      -       +      -
    269A  HIS*     3.7    18.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 171 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169A  LEU*     4.4     4.5    -      -       +      -
    170A  ILE*     1.3    76.8    -      -       -      +
    172A  MET*     1.3    60.8    +      -       -      +
    173A  LEU*     3.8    24.0    -      -       +      -
    229A  ILE*     3.5    10.1    -      -       +      +
    231A  PHE*     5.7     0.2    -      -       +      -
    249A  LEU*     4.2    19.7    -      -       +      -
    253A  VAL*     3.7    27.8    -      -       +      -
    266A  ILE*     4.0    18.2    -      -       +      -
    267A  VAL      2.7    12.7    +      -       -      +
    268A  VAL*     3.3    12.6    -      -       +      +
    269A  HIS*     2.9    28.6    +      -       -      +
    280A  PHE*     4.4    11.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 172 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    170A  ILE      4.1     0.2    -      -       -      -
    171A  VAL*     1.3    73.8    -      -       -      +
    173A  LEU*     1.3    66.7    +      -       -      +
    174A  THR*     4.2    18.8    -      -       +      +
    184A  VAL      5.0     6.5    -      -       -      +
    186A  TYR*     4.1     0.4    -      -       +      -
    187A  TRP*     3.6    39.7    -      -       +      -
    228A  HIS*     4.0    15.5    -      -       +      +
    229A  ILE      2.7    15.0    +      -       -      +
    230A  LEU*     4.0    18.4    -      -       +      -
    231A  PHE*     2.8    31.7    +      -       -      +
    269A  HIS*     3.3    36.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 173 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    171A  VAL*     3.8    11.0    -      -       +      -
    172A  MET*     1.3    79.0    -      -       -      +
    174A  THR*     1.3    63.9    +      -       -      +
    231A  PHE*     3.6     9.4    -      -       +      -
    234A  TRP*     3.9    18.6    -      -       +      -
    249A  LEU*     3.8    29.6    -      -       +      -
    268A  VAL*     3.8    22.9    -      -       +      -
    269A  HIS      2.9    11.2    +      -       -      +
    270A  CYS*     3.4    22.1    -      -       +      +
    276A  ARG*     3.4    53.4    +      -       +      +
    277A  THR*     3.8     1.8    -      -       -      +
    280A  PHE*     3.8     7.6    -      -       +      -
    437A  PO4      4.6     1.2    +      -       -      -
----------------------------------------------------------
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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