Contacts of the helix formed by residues 838 - 843 (chain A) in PDB entry 1QU3
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 ASN 838 (chain A).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
833A SER* 3.6 15.7 + - - -
834A ASN 4.3 2.0 - - - -
837A PHE* 1.3 79.2 - - + +
839A ALA* 1.3 59.3 + - - +
840A SER* 3.3 0.8 - - - -
841A GLU* 3.0 42.6 + - - +
842A PHE* 3.1 18.7 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with ALA 839 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
831A ILE* 3.3 27.8 - - + -
832A ALA 3.2 25.4 - - - +
833A SER* 3.6 2.0 - - - +
837A PHE* 3.0 17.0 + - - -
838A ASN* 1.3 74.3 - - - +
840A SER* 1.3 66.8 + - - +
843A LEU* 3.1 28.0 + - - +
860A VAL* 4.6 1.6 - - - -
873A HIS 3.7 13.0 - - - +
874A GLY* 3.9 2.2 - - - -
----------------------------------------------------------
Back to top of page
Residues in contact with SER 840 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
832A ALA 3.7 0.2 - - - -
833A SER* 2.5 42.6 + - - +
838A ASN* 3.3 0.8 - - - -
839A ALA* 1.3 82.5 - - - +
841A GLU* 1.3 65.9 + - - +
843A LEU* 3.4 6.6 + - - -
844A THR* 3.7 7.7 + - - -
860A VAL* 3.1 23.1 - - - +
862A ASP* 3.0 33.5 + - - -
----------------------------------------------------------
Back to top of page
Residues in contact with GLU 841 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
838A ASN* 3.0 24.8 + - - +
840A SER* 1.3 78.5 - - - +
842A PHE* 1.3 56.4 + - - +
844A THR* 2.7 33.2 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with PHE 842 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
797A LYS* 4.1 14.8 - - + -
800A THR* 3.9 18.6 - - + -
801A PHE* 3.9 22.9 - - - -
804A LEU* 3.9 11.0 - - + -
837A PHE* 3.6 25.6 - + + -
838A ASN 3.1 21.6 + - - +
839A ALA 3.4 3.1 - - - +
840A SER 3.0 1.2 + - - -
841A GLU* 1.3 76.7 - - - +
843A LEU* 1.3 79.2 + - + +
844A THR* 2.4 18.8 + - - -
845A SER* 3.4 10.4 + - - -
846A PHE* 3.6 36.8 - + - -
----------------------------------------------------------
Back to top of page
Residues in contact with LEU 843 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
801A PHE* 4.1 22.2 - - + -
804A LEU* 3.8 14.8 - - + -
831A ILE* 3.3 38.4 - - + -
839A ALA 3.1 14.8 + - - +
840A SER 4.2 1.1 - - - +
842A PHE* 1.3 103.6 - - + +
844A THR* 1.3 61.0 + - - +
845A SER 3.5 1.1 + - - -
846A PHE* 3.7 15.8 + - + +
849A LEU* 3.8 29.8 - - + +
853A PHE* 5.5 5.2 - - + -
860A VAL* 3.9 20.3 - - + +
----------------------------------------------------------
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