Contacts of the helix formed by residues 57 - 61 (chain 2) in PDB entry 1AR9
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 ASP 57 (chain 2).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
412 TYR* 4.5 15.3 + - - +
552 GLU* 2.8 13.9 + - + +
562 PRO* 1.3 73.0 - - - +
582 VAL* 1.3 85.1 + - + +
592 ALA 3.0 1.2 + - - -
602 ALA* 3.1 1.9 + - - -
612 CYS* 2.8 42.0 + - - +
2582 CYS 5.2 0.6 + - - -
----------------------------------------------------------
Back to top of page
Residues in contact with VAL 58 (chain 2).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
192 GLY* 3.8 27.2 - - - +
202 ASN* 5.4 1.7 + - - +
562 PRO 3.2 0.9 + - - +
572 ASP* 1.3 98.4 - - + +
592 ALA* 1.3 65.0 + - + +
602 ALA 3.2 0.9 + - - -
612 CYS* 3.8 10.5 + - - +
622 ARG* 4.0 17.7 - - - +
----------------------------------------------------------
Back to top of page
Residues in contact with ALA 59 (chain 2).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
562 PRO* 3.1 20.5 + - + +
572 ASP 3.0 0.6 + - - -
582 VAL* 1.3 81.2 - - + +
602 ALA* 1.3 58.4 + - - +
622 ARG* 3.9 8.1 - - - +
642 TYR* 3.3 12.0 + - - -
912 LEU* 3.6 38.7 + - + +
952 ASN* 5.7 0.2 - - - +
----------------------------------------------------------
Back to top of page
Residues in contact with ALA 60 (chain 2).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
562 PRO* 4.0 20.6 + - + -
572 ASP 3.1 2.8 + - - +
592 ALA* 1.3 80.9 - - - +
612 CYS* 1.3 57.0 + - - +
622 ARG* 3.0 10.8 + - - -
642 TYR* 3.5 13.8 - - - -
912 LEU 4.4 0.9 - - - -
922 PHE* 3.7 28.7 - - + +
2552 PRO* 3.1 20.7 - - - +
2582 CYS* 4.0 16.2 - - - -
----------------------------------------------------------
Back to top of page
Residues in contact with CYS 61 (chain 2).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
182 LEU* 3.7 16.7 - - + +
192 GLY* 3.6 19.6 + - - -
412 TYR* 5.1 2.0 - - - -
572 ASP* 2.8 27.7 + - - +
582 VAL* 3.8 5.4 + - - +
602 ALA* 1.3 72.4 - - - +
622 ARG* 1.3 59.6 + - - +
2552 PRO 3.0 23.3 - - - +
2562 MET* 3.9 2.0 - - - -
2572 CYS* 3.7 22.7 - - - -
2582 CYS* 3.7 26.2 - - - -
----------------------------------------------------------
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