Contacts of the helix formed by residues 175 - 182 (chain Q) in PDB entry 2X86
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 GLU 175 (chain Q).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
10Q PHE* 3.6 28.9 - - + -
170Q VAL 4.5 1.4 - - - +
172Q GLY 3.1 21.3 + - - +
174Q ARG* 1.3 79.0 - - - +
176Q GLY* 1.3 57.6 + - - +
177Q HIS* 3.0 12.3 - - - -
178Q LYS* 2.9 32.7 + - + +
181Q MET 4.9 0.2 - - - +
182Q ALA* 3.8 9.5 - - - +
183Q SER* 2.7 50.1 + - - -
186Q PHE* 3.6 6.3 - - + +
302Q TYR* 2.6 28.5 + - - +
400Q NAP 5.8 0.2 + - - -
----------------------------------------------------------
Back to top of page
Residues in contact with GLY 176 (chain Q).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
41Q ASN* 5.3 1.0 + - - -
174Q ARG* 3.6 2.2 - - - +
175Q GLU* 1.3 78.4 - - - +
177Q HIS* 1.3 59.6 + - - +
178Q LYS 3.3 0.4 + - - -
179Q GLY* 4.2 5.4 + - - -
186Q PHE* 3.5 36.4 - - - -
----------------------------------------------------------
Back to top of page
Residues in contact with HIS 177 (chain Q).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
9Q GLY* 3.8 4.5 - - - -
10Q PHE 3.5 6.7 + - - -
35Q ASP* 4.1 16.1 - - - +
37Q THR* 4.4 9.9 - - - +
38Q LYS* 3.7 41.1 - - + -
40Q VAL* 6.3 1.6 - - + -
41Q ASN* 3.1 29.3 + - - -
174Q ARG 3.3 18.1 + - - -
175Q GLU* 2.9 1.9 + - - -
176Q GLY* 1.3 74.2 + - - +
178Q LYS* 1.3 73.7 + - + +
179Q GLY* 3.0 11.2 + - - -
400Q NAP 2.6 31.9 + - - -
----------------------------------------------------------
Back to top of page
Residues in contact with LYS 178 (chain Q).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
10Q PHE* 4.0 15.2 - - + -
79Q SER* 4.1 3.1 - - - -
175Q GLU* 2.9 25.0 + - + +
177Q HIS* 1.3 99.3 - - + +
179Q GLY* 1.3 65.3 + - - +
180Q SER 3.1 0.3 + - - -
181Q MET* 2.8 30.8 + - + +
182Q ALA* 3.7 11.4 - - - +
400Q NAP 3.0 56.0 + - - +
402Q BMA 2.5 36.4 + - - -
----------------------------------------------------------
Back to top of page
Residues in contact with GLY 179 (chain Q).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
176Q GLY 4.2 5.1 + - - -
177Q HIS 3.0 7.4 + - - -
178Q LYS* 1.3 73.9 - - - +
180Q SER* 1.3 57.7 + - - -
182Q ALA* 3.1 16.1 + - - +
186Q PHE* 5.3 2.2 - - - -
187Q HIS* 2.9 20.4 + - - -
----------------------------------------------------------
Back to top of page
Residues in contact with SER 180 (chain Q).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
82Q THR* 5.4 1.4 + - - -
178Q LYS 3.1 0.8 + - - -
179Q GLY* 1.3 71.6 - - - -
181Q MET* 1.3 70.3 + - - +
182Q ALA 3.3 1.8 - - - -
187Q HIS* 3.8 10.4 - - - -
401Q ADP 3.3 28.6 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with MET 181 (chain Q).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
79Q SER* 4.3 1.8 - - - +
80Q SER* 3.9 20.4 - - - -
81Q THR* 3.5 38.4 - - - +
82Q THR* 3.9 24.2 - - + +
175Q GLU* 4.9 0.2 - - - +
178Q LYS* 2.8 29.1 + - + +
180Q SER* 1.3 102.1 + - - +
182Q ALA* 1.3 63.6 + - - +
183Q SER 3.9 0.2 + - - -
401Q ADP 3.6 18.0 + - - +
402Q BMA 3.3 45.3 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with ALA 182 (chain Q).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
175Q GLU* 3.8 24.0 - - - +
178Q LYS* 3.6 7.9 + - + -
179Q GLY 3.1 18.3 + - - +
180Q SER 3.3 0.2 - - - -
181Q MET* 1.3 80.0 - - - +
183Q SER* 1.3 67.3 + - - +
186Q PHE* 3.7 28.3 - - + -
187Q HIS* 3.1 5.6 - - - +
401Q ADP 3.0 21.0 + - - -
402Q BMA 5.5 0.2 - - - -
----------------------------------------------------------
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