Contacts of the helix formed by residues 368 - 373 (chain D) in PDB entry 3MLQ
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 368 (chain D).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
100D LEU* 3.8 4.3 - - - -
109D LYS* 3.8 20.3 - - - +
111D ASP* 3.9 8.3 + - - -
366D THR 4.8 4.9 - - - +
367D LEU* 1.3 77.9 - - - +
369D PRO* 1.4 78.9 - - - +
370D ALA* 3.7 9.1 + - + +
371D LYS* 3.0 32.4 + - + +
372D LEU* 3.1 13.9 + - - +
358H GLU* 5.7 1.4 - - - +
----------------------------------------------------------
Back to top of page
Residues in contact with PRO 369 (chain D).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
66D LEU* 5.3 6.3 - - + -
98D LEU* 3.8 24.0 - - + +
100D LEU* 3.6 26.7 - - + +
109D LYS* 3.3 35.2 - - + +
111D ASP* 3.9 17.7 - - + -
113D VAL* 4.2 3.4 - - + -
368D THR* 1.4 89.6 - - - +
370D ALA* 1.3 61.7 + - - +
372D LEU* 3.1 18.8 + - + +
373D VAL* 3.1 18.4 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with ALA 370 (chain D).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
111D ASP* 4.1 21.0 + - - +
113D VAL* 3.9 20.6 - - + +
368D THR* 3.4 6.0 + - + +
369D PRO* 1.3 78.1 - - - +
371D LYS* 1.3 59.9 + - - +
373D VAL* 3.8 13.0 - - - +
357H GLY 6.1 0.7 - - - +
----------------------------------------------------------
Back to top of page
Residues in contact with LYS 371 (chain D).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
358D ARG* 4.5 9.2 + - - -
366D THR 5.8 0.7 - - - +
367D LEU* 5.0 9.4 - - + -
368D THR* 3.0 34.7 + - + +
370D ALA* 1.3 80.4 - - - +
372D LEU* 1.3 62.0 + - - +
373D VAL 4.5 1.9 - - - +
----------------------------------------------------------
Back to top of page
Residues in contact with LEU 372 (chain D).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
64D LEU* 5.0 1.6 - - + -
66D LEU* 4.9 7.0 - - + -
100D LEU* 4.1 30.3 - - + -
355D VAL* 3.6 25.0 + - + +
358D ARG* 3.2 57.5 + - + +
359D MET* 3.6 28.0 - - + +
367D LEU* 3.9 21.1 - - + -
368D THR 3.1 15.2 + - - +
369D PRO* 3.1 9.2 + - + +
371D LYS* 1.3 77.0 - - - +
373D VAL* 1.3 68.2 + - + +
374D ASN 3.2 3.3 + - - -
----------------------------------------------------------
Back to top of page
Residues in contact with VAL 373 (chain D).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
52D PHE* 5.8 4.3 - - + -
66D LEU* 4.6 10.1 - - + -
98D LEU* 3.0 32.3 - - + -
113D VAL* 3.7 25.8 - - + +
115D LEU* 3.9 19.3 - - + -
351D LEU* 4.0 16.4 - - + -
355D VAL* 5.0 9.0 - - + -
369D PRO 3.1 11.3 + - - +
370D ALA 3.8 11.6 - - - +
371D LYS 4.5 1.2 - - - +
372D LEU* 1.3 78.8 - - + +
374D ASN* 1.3 67.2 + - - +
375D SER* 4.0 3.5 + - - +
----------------------------------------------------------
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