Contacts of the helix formed by residues 193 - 196 (chain A) in PDB entry 3T79
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 SER 193 (chain A).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
190A ASN* 3.4 24.7 + - - +
192A GLN* 1.3 80.4 - - - +
194A PRO* 1.3 68.8 - - - +
195A PHE 3.2 1.2 + - - -
196A THR* 2.8 31.0 + - - +
197A CYS* 3.2 14.9 + - - +
387A GLN* 4.1 4.3 + - - +
390A LEU* 4.1 14.0 - - - +
102D ASP* 6.1 0.7 - - - -
105D ASN* 4.7 8.8 + - - -
----------------------------------------------------------
Back to top of page
Residues in contact with PRO 194 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
190A ASN 3.5 10.7 - - - +
191A PHE 3.8 11.4 - - - +
192A GLN 3.7 5.2 - - - -
193A SER* 1.3 89.7 - - - +
195A PHE* 1.3 60.0 + - + +
197A CYS* 2.8 30.1 + - + +
200A PHE* 3.4 21.2 - - + -
348A SER* 3.4 37.0 - - - +
351A LEU* 4.0 19.3 - - + -
381A PRO* 6.2 1.3 - - + -
382A LEU* 6.2 0.4 - - + -
387A GLN* 3.9 13.5 - - - +
----------------------------------------------------------
Back to top of page
Residues in contact with PHE 195 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
114A SER* 3.8 2.4 - - - -
115A ILE* 5.3 2.7 - - + +
118A TRP* 2.7 53.6 + + + +
144A GLN* 2.9 13.7 + - - -
193A SER 3.2 1.2 - - - -
194A PRO* 1.3 78.5 - - + +
196A THR* 1.3 60.2 + - + +
197A CYS 3.1 0.9 + - - -
200A PHE* 4.8 7.0 - + - -
351A LEU* 3.9 28.7 - - + -
352A LEU* 3.8 31.0 - - + -
355A VAL* 4.1 28.0 - - + -
356A PHE* 4.3 11.0 - + - -
387A GLN* 4.0 17.0 - - + -
390A LEU* 3.7 33.9 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with THR 196 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
110A LEU* 3.8 28.9 - - + +
111A GLN* 4.0 27.1 - - + -
114A SER* 3.9 19.5 - - - +
144A GLN* 3.4 15.1 - - - +
148A ASN* 5.1 3.8 + - - +
190A ASN* 4.1 7.0 + - - +
193A SER* 2.8 33.4 + - - +
195A PHE* 1.3 75.8 - - - +
197A CYS* 1.3 57.9 + - - +
198A PRO* 3.6 5.9 - - - +
312A ARG* 4.8 5.1 + - - -
390A LEU* 4.8 9.0 - - + -
----------------------------------------------------------
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