Contacts of the helix formed by residues 565 - 570 (chain B) in PDB entry 1QAS
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.
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 VAL 565 (chain B).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
563B SER* 3.4 13.3 - - - +
564B PRO* 1.3 76.5 - - + +
566B GLU* 1.3 59.1 + - - +
568B TRP* 3.0 18.0 + - + +
569B ASN* 2.8 42.9 + - - +
588B VAL* 3.7 29.4 - - + -
661B HIS* 4.1 16.8 - - + +
662B GLY* 3.4 36.8 - - - +
697B LEU 4.3 4.7 - - - +
699B LEU* 4.6 3.1 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with GLU 566 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
529B LEU* 4.0 14.4 - - + -
532B LEU* 3.4 21.2 - - + +
563B SER* 4.3 10.1 + - - +
564B PRO 3.5 0.6 - - - -
565B VAL* 1.3 78.6 - - - +
567B MET* 1.3 61.7 + - + +
569B ASN* 3.7 8.9 + - - +
570B GLY 3.7 7.3 + - - -
617B SER* 3.5 27.3 + - - -
618B ARG* 3.3 46.5 + - - +
664B GLY* 4.9 6.4 + - - -
----------------------------------------------------------
Back to top of page
Residues in contact with MET 567 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
525B GLU* 3.5 40.2 - - + +
528B ALA* 3.7 20.2 - - + -
529B LEU* 3.9 17.0 - - + -
532B LEU* 4.3 11.0 - - - -
550B ILE* 3.9 12.3 - - + -
562B TYR* 3.9 27.8 - - + -
563B SER 4.1 6.7 - - - +
564B PRO 3.1 11.0 - - - +
565B VAL 3.0 0.4 - - - -
566B GLU* 1.3 77.5 - - + +
568B TRP* 1.3 59.9 + - - +
570B GLY* 2.9 19.4 + - - -
572B CYS* 3.3 27.1 + - + +
575B VAL* 3.6 20.9 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with TRP 568 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
306B LEU* 3.5 44.4 - - + +
564B PRO* 3.0 28.5 + - + -
565B VAL* 3.0 22.7 + - + +
567B MET* 1.3 75.6 - - - +
569B ASN* 1.3 61.6 + - - +
570B GLY 3.0 0.2 - - - -
571B GLY* 3.0 19.9 + - - -
572B CYS 3.6 11.2 - - - -
573B GLN 5.1 2.4 + - - -
575B VAL* 3.8 18.5 - - + +
588B VAL* 3.7 23.6 - - + -
589B TYR* 3.7 27.9 + + - -
592B CYS* 3.3 33.9 - - + -
593B PHE* 3.8 16.2 - + - -
608B LEU* 3.8 10.6 - - - +
697B LEU* 4.9 3.3 - - + +
699B LEU* 4.4 9.6 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with ASN 569 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
540B VAL* 4.2 1.6 - - - +
565B VAL* 2.8 27.4 + - - +
566B GLU* 3.7 16.3 + - - +
567B MET 3.2 0.4 - - - -
568B TRP* 1.3 77.2 - - - +
570B GLY* 1.3 56.7 + - - +
571B GLY 3.4 1.5 + - - -
608B LEU* 3.9 5.0 - - - +
615B PHE* 3.3 25.3 - - - -
617B SER* 3.3 32.0 + - - +
662B GLY 3.5 9.5 + - - -
663B VAL* 3.4 22.6 - - - +
697B LEU* 3.5 37.6 - - + +
----------------------------------------------------------
Back to top of page
Residues in contact with GLY 570 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
532B LEU* 3.8 24.5 - - - +
539B PHE 4.1 0.9 - - - -
540B VAL* 3.5 26.3 + - - -
543B ASN* 2.8 19.4 + - - -
566B GLU* 3.7 3.0 + - - -
567B MET 2.9 9.0 + - - -
569B ASN* 1.3 80.0 - - - +
571B GLY* 1.3 55.7 + - - +
572B CYS* 3.1 7.1 - - - -
617B SER* 5.7 0.9 - - - -
----------------------------------------------------------
Back to top of page
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