Contacts of the strand formed by residues 148 - 155 (chain A) in PDB entry 1QXT


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 HIS 148 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145A  TYR*     2.9    41.4    +      +       -      -
    146A  ASN*     3.5     8.5    -      -       +      +
    147A  SER*     1.3    75.0    -      -       -      +
    149A  ASN*     1.3    83.3    +      -       -      +
    150A  VAL*     3.8    15.3    -      -       +      -
    165A  PHE*     3.5    30.5    -      +       -      -
    166A  LYS      4.6    13.0    -      -       -      +
    167A  ILE*     5.6     4.0    -      -       +      -
    168A  ARG*     4.9     7.9    -      -       -      +
    202A  SER*     3.9     0.3    +      -       -      -
    203A  THR*     2.8    59.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 149 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    148A  HIS*     1.3    84.7    +      -       -      +
    150A  VAL*     1.3    63.0    +      -       -      +
    151A  TYR*     3.2    38.3    +      -       +      -
    165A  PHE*     3.1    22.7    -      -       -      +
    200A  TYR*     3.4    35.9    -      -       +      -
    201A  LEU      3.2     3.4    -      -       -      -
    202A  SER*     3.7    14.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 150 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69A  GLN*     3.8    26.2    -      -       +      +
    148A  HIS*     3.8    20.6    -      -       +      -
    149A  ASN*     1.3    76.1    -      -       -      +
    151A  TYR*     1.3    61.1    +      -       -      +
    152A  ILE*     3.5     6.4    +      -       +      +
    163A  ALA*     4.1    17.7    -      -       +      -
    165A  PHE*     3.8    24.7    -      -       +      -
    200A  TYR*     3.2     4.8    -      -       -      -
    201A  LEU*     2.8    50.1    +      -       +      +
    203A  THR*     4.0    11.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 151 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149A  ASN*     3.2    39.8    +      -       +      +
    150A  VAL*     1.3    70.3    -      -       -      +
    152A  ILE*     1.3    61.3    +      -       -      +
    153A  THR*     5.7     0.9    -      -       -      +
    163A  ALA*     3.2     5.0    -      -       -      +
    164A  ASN*     2.9    50.6    +      -       +      +
    165A  PHE*     4.5     6.3    -      -       +      -
    166A  LYS      5.9     0.9    -      -       -      -
    199A  HIS      3.7     5.4    -      -       -      +
    200A  TYR*     3.8    28.7    -      +       +      -
----------------------------------------------------------
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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
----------------------------------------------------------
     84A  PHE*     3.6    31.4    -      -       +      -
    150A  VAL*     3.8     8.5    -      -       +      +
    151A  TYR*     1.3    77.2    -      -       -      +
    153A  THR*     1.3    69.1    +      -       -      +
    161A  ILE*     3.9    23.3    -      -       +      -
    162A  LYS      3.5     9.0    -      -       -      +
    163A  ALA*     4.3    12.6    -      -       +      -
    196A  PRO*     4.2     3.4    -      -       +      -
    197A  ASP      4.3     0.6    -      -       -      +
    198A  ASN*     3.4     7.6    -      -       -      +
    199A  HIS*     2.8    69.6    +      -       +      +
    201A  LEU*     3.7    21.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 153 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151A  TYR      5.7     0.7    -      -       -      +
    152A  ILE*     1.3    78.2    -      -       -      +
    154A  ALA*     1.3    66.3    +      -       -      +
    161A  ILE*     3.5     5.6    -      -       -      +
    162A  LYS*     2.9    56.6    +      -       +      +
    163A  ALA*     5.8     0.2    -      -       -      -
    196A  PRO*     4.8     1.8    -      -       -      -
    197A  ASP      5.3     0.4    -      -       -      -
    198A  ASN*     3.0    27.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 154 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    153A  THR*     1.3    86.2    +      -       -      +
    155A  ASP*     1.3    59.9    +      -       -      +
    156A  LYS*     3.8    14.0    +      -       +      +
    160A  GLY      3.9     5.6    -      -       -      +
    161A  ILE*     4.4     3.4    -      -       -      +
    162A  LYS*     5.0     2.1    -      -       -      +
    195A  LEU*     4.6    10.8    -      -       +      -
    196A  PRO*     3.2    35.8    +      -       +      +
    198A  ASN*     4.5     1.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 155 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    154A  ALA*     1.3    73.3    -      -       -      +
    156A  LYS*     1.3    59.6    +      -       -      +
    157A  GLN*     4.1    17.7    +      -       -      +
    158A  LYS*     3.6    31.5    +      -       -      +
    159A  ASN      3.1     7.3    +      -       -      -
    160A  GLY      2.9    42.2    +      -       -      +
    161A  ILE*     4.2    11.7    -      -       -      +
    162A  LYS*     3.6    34.5    +      -       +      +
    184A  GLN*     3.9     3.3    -      -       -      +
    185A  ASN      5.5     1.4    -      -       -      +
    195A  LEU*     5.0     0.4    -      -       -      -
----------------------------------------------------------
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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