Contacts of the helix formed by residues 170 - 177 (chain N) in PDB entry 3H1J
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 THR 170 (chain N).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
50N GLU 5.6 0.3 + - - -
53N ASN* 3.6 17.2 + - - +
138N LEU* 4.9 0.4 - - - -
169N GLY* 1.3 75.4 - - - -
171N THR* 1.3 75.8 + - - +
172N GLU* 3.1 19.7 - - + +
173N ASN* 3.7 20.4 + - - -
174N ILE* 3.2 25.7 + - - +
3R ASN* 4.6 7.3 + - - +
4R ASP* 3.3 24.7 - - + +
----------------------------------------------------------
Back to top of page
Residues in contact with THR 171 (chain N).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
135N LEU* 4.1 15.7 - - + +
138N LEU* 4.3 7.9 - - - +
169N GLY 4.1 0.2 + - - -
170N THR* 1.3 77.7 - - - +
172N GLU* 1.3 67.2 + - + +
174N ILE* 3.6 2.3 + - - +
175N LYS* 3.1 39.8 + - + +
1R VAL* 3.2 29.5 - - - +
4R ASP* 3.1 18.9 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with GLU 172 (chain N).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
170N THR* 3.1 13.1 - - + +
171N THR* 1.3 80.5 - - + +
173N ASN* 1.3 70.7 + - - +
175N LYS* 3.0 23.0 + - - +
176N HIS* 2.9 53.6 + - + -
----------------------------------------------------------
Back to top of page
Residues in contact with ASN 173 (chain N).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
50N GLU* 3.3 13.6 + - - +
51N LYS 2.9 29.5 + - - -
52N ASN 3.6 0.2 - - - -
53N ASN* 3.0 42.0 + - - +
170N THR* 3.5 22.9 + - - +
172N GLU* 1.3 79.9 - - - +
174N ILE* 1.3 56.3 + - + +
176N HIS* 4.4 2.2 - - - +
177N LEU* 2.7 46.5 + - + +
----------------------------------------------------------
Back to top of page
Residues in contact with ILE 174 (chain N).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
54N GLY* 5.6 5.4 - - - +
58N PHE* 3.7 14.4 - - + -
131N ARG* 2.6 60.0 + - + +
134N ILE* 3.3 37.2 - - + -
135N LEU* 3.5 21.3 - - + -
138N LEU* 3.5 30.5 - - + -
168N GLU 3.7 17.5 - - - +
169N GLY* 5.1 0.4 - - - -
170N THR 3.2 11.3 + - - +
171N THR 3.9 4.0 - - - +
172N GLU 3.2 0.6 - - - -
173N ASN* 1.3 77.3 - - + +
175N LYS* 1.3 52.9 + - - +
177N LEU* 4.9 0.9 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with LYS 175 (chain N).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
131N ARG* 3.5 22.4 + - - +
135N LEU* 3.9 25.1 - - + -
171N THR* 3.1 28.5 + - + +
172N GLU* 3.0 23.5 + - - +
174N ILE* 1.3 79.9 - - - +
176N HIS* 1.3 80.8 + - + +
----------------------------------------------------------
Back to top of page
Residues in contact with HIS 176 (chain N).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
131N ARG* 3.8 0.7 - - - +
172N GLU* 2.9 52.5 + - + +
173N ASN* 4.5 1.8 - - - +
175N LYS* 1.3 103.8 + - + +
177N LEU* 1.3 69.9 + - - +
178N THR* 3.3 8.8 + - - -
181N ASP* 5.0 0.9 - - - +
----------------------------------------------------------
Back to top of page
Residues in contact with LEU 177 (chain N).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
51N LYS 4.2 7.0 - - - +
52N ASN* 4.0 25.1 - - + +
53N ASN 4.5 2.5 - - - +
54N GLY* 3.8 9.9 - - - +
55N ALA* 3.8 29.6 - - + +
58N PHE* 3.9 22.2 - - + -
127N ILE* 5.2 0.3 - - - +
131N ARG* 3.1 26.4 + - - +
173N ASN* 2.7 36.0 + - + +
174N ILE* 4.9 1.1 - - - +
176N HIS* 1.3 75.3 - - - +
178N THR* 1.3 59.5 + - - +
181N ASP* 3.6 28.7 - - + +
182N LEU* 4.0 12.8 - - + -
----------------------------------------------------------
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