Contacts of the helix formed by residues 161 - 167 (chain B) in PDB entry 4NEN
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 HIS 161 (chain B).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
96A GLU* 3.2 36.4 + - + -
98A GLY 3.3 16.0 + - - -
99A ARG* 3.1 34.0 + - + +
100A ASN 3.8 2.7 - - - -
101A MET* 4.1 16.8 - - + +
159B ASN* 3.1 13.5 + - - +
160B THR* 1.3 77.1 + - - +
162B PRO* 1.3 66.9 - - + +
163B ASP* 3.1 51.0 + - + +
164B LYS 2.8 9.1 + - - +
165B LEU* 2.7 31.4 + - - -
----------------------------------------------------------
Back to top of page
Residues in contact with PRO 162 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
96A GLU* 6.2 0.4 - - - -
101A MET* 5.1 5.2 - - + -
160B THR 3.3 7.1 - - - +
161B HIS* 1.3 98.8 - - + +
163B ASP* 1.3 63.0 + - - +
165B LEU* 3.6 13.2 + - + +
166B ARG* 3.3 34.7 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with ASP 163 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
99A ARG* 3.3 48.8 + - + +
161B HIS* 2.9 27.5 + - + +
162B PRO* 1.3 78.9 - - - +
164B LYS* 1.3 58.0 + - - +
166B ARG* 2.5 37.3 + - - +
167B ASN* 3.3 20.8 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with LYS 164 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
99A ARG* 3.4 49.1 - - - +
100A ASN* 3.1 21.6 + - - +
312A GLU* 3.6 9.1 + - - -
313A LYS 5.5 0.2 - - - -
314A ILE* 5.2 12.1 - - - +
315A PHE 6.3 0.9 - - - +
159B ASN* 3.3 43.6 - - + +
161B HIS* 2.8 7.7 + - - +
163B ASP* 1.3 74.3 - - - +
165B LEU* 1.3 63.4 + - - +
166B ARG 3.3 0.7 - - - -
167B ASN 3.7 13.5 - - - +
168B PRO* 3.4 30.0 - - + +
170B PRO* 6.4 2.9 - - - -
179B PRO* 4.6 2.1 - - - +
----------------------------------------------------------
Back to top of page
Residues in contact with LEU 165 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
153B THR* 4.9 9.0 - - + +
158B VAL* 4.1 15.0 - - + -
159B ASN 3.5 15.0 - - - +
160B THR* 3.3 38.8 - - + +
161B HIS 2.7 6.7 + - - +
162B PRO* 3.7 14.6 - - + +
164B LYS* 1.3 80.1 - - - +
166B ARG* 1.3 61.2 + - + +
178B PRO* 3.2 10.6 - - - +
179B PRO* 3.1 30.5 - - + +
----------------------------------------------------------
Back to top of page
Residues in contact with ARG 166 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
99A ARG* 5.5 1.0 - - - +
162B PRO* 3.3 18.4 + - - +
163B ASP* 2.5 38.4 + - - +
164B LYS 3.3 0.2 - - - -
165B LEU* 1.3 81.2 - - + +
167B ASN* 1.3 61.5 + - + +
168B PRO* 4.0 2.9 - - - +
176B CYS 5.4 2.3 - - - +
177B GLN* 4.8 1.0 + - - -
178B PRO* 3.9 22.8 - - + +
----------------------------------------------------------
Back to top of page
Residues in contact with ASN 167 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
99A ARG* 5.0 6.2 + - - +
163B ASP 3.3 11.1 + - - +
164B LYS* 3.6 18.1 - - - +
166B ARG* 1.3 82.8 + - + +
168B PRO* 1.3 63.6 - - - +
169B CYS* 3.5 15.8 + - - +
171B ASN 5.0 1.4 - - - +
172B LYS* 5.8 2.5 - - - +
173B GLU 3.7 18.2 + - - +
174B LYS* 5.4 2.2 - - - +
176B CYS* 3.4 26.3 - - - +
----------------------------------------------------------
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