Contacts of the helix formed by residues 172 - 175 (chain J) in PDB entry 4GUN
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 TRP 172 (chain J).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
36J HIS* 6.2 0.2 - - - -
40J TYR* 3.7 14.8 - - - -
72J PHE* 3.7 12.3 - + - -
132J SER* 3.6 17.2 - - - +
133J GLY 3.6 19.9 - - - +
134J TRP* 3.7 4.4 - - - +
154J ASN* 2.9 41.6 + - + +
155J GLN* 3.3 22.5 - - + +
170J ASP* 3.1 24.4 + - - +
171J ALA* 1.4 78.2 - - - +
173J GLU* 1.3 66.1 + - - +
174J HIS* 3.5 36.6 - + + +
175J ALA* 3.0 18.0 + - - +
176J TYR* 3.4 4.3 - - - -
131L GLY* 3.5 31.4 - - - -
173L GLU* 3.6 16.8 - - - -
----------------------------------------------------------
Back to top of page
Residues in contact with GLU 173 (chain J).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
131J GLY 5.8 4.0 - - - +
132J SER* 5.1 3.3 + - - +
171J ALA 3.6 1.5 + - - +
172J TRP* 1.3 69.6 - - - +
174J HIS* 1.4 58.9 + - - +
175J ALA 3.0 1.4 + - - -
176J TYR* 3.1 28.5 + - + +
177J TYR* 2.9 42.8 + - + +
36L HIS* 3.9 9.2 - - - -
132L SER* 4.9 1.0 + - - -
172L TRP* 3.6 19.4 - - + -
173L GLU* 3.3 24.4 + - + +
174L HIS* 2.8 55.1 + - - +
177L TYR* 5.8 0.2 - - - -
----------------------------------------------------------
Back to top of page
Residues in contact with HIS 174 (chain J).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
28J ILE* 4.0 14.6 - - - +
32J HIS* 3.0 21.5 + + - +
36J HIS* 3.6 38.1 + + + +
40J TYR* 4.2 8.5 - - - -
80J HIS* 3.9 0.2 + - - -
170J ASP* 3.7 0.2 + - - -
172J TRP* 3.5 29.7 - + + +
173J GLU* 1.4 74.1 - - - +
175J ALA* 1.4 61.7 + - - +
176J TYR 3.3 1.0 + - - -
177J TYR 4.6 1.7 + - - +
178J LEU 5.7 0.3 + - - -
301J MN 2.1 37.6 + - - -
173L GLU* 2.9 34.2 + - - +
177L TYR* 3.7 29.6 + - + -
----------------------------------------------------------
Back to top of page
Residues in contact with ALA 175 (chain J).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
24J ILE* 4.5 3.5 - - - +
28J ILE* 3.5 19.3 - - - +
32J HIS* 3.8 13.6 + - + -
83J PHE* 5.3 0.2 - - + -
170J ASP* 3.8 27.4 - - - +
172J TRP 3.0 16.0 + - - +
174J HIS* 1.4 81.7 - - - +
176J TYR* 1.3 59.7 + - - +
187J TYR* 3.6 31.8 + - + +
----------------------------------------------------------
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