Contacts of the helix formed by residues 887 - 892 (chain A) in PDB entry 3CQC
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 LYS 887 (chain A).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
850A ARG* 4.8 5.2 + - - -
883A SER 2.8 16.5 + - - -
884A GLU* 2.7 54.7 + - - +
885A ARG 4.8 1.6 + - - -
886A HIS* 1.3 80.2 - - - +
888A LEU* 1.3 62.7 + - - +
889A TYR* 3.2 17.7 - - - +
890A LEU* 3.1 43.8 + - + +
891A VAL 4.5 0.3 + - - -
----------------------------------------------------------
Back to top of page
Residues in contact with LEU 888 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
821A LEU* 4.0 29.8 - - + +
822A LEU* 5.0 0.7 - - + -
850A ARG* 4.7 6.3 - - - +
854A LEU* 4.1 30.7 - - + -
880A MET* 3.4 49.6 - - + +
881A VAL* 3.5 20.9 + - + +
883A SER 4.2 0.4 + - - -
886A HIS* 3.1 18.1 + - + +
887A LYS* 1.3 77.0 - - - +
889A TYR* 1.3 64.0 + - - +
891A VAL* 2.9 19.5 + - + +
892A PHE* 3.3 17.5 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with TYR 889 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
881A VAL* 2.9 29.6 + - + +
882A SER* 3.6 19.5 - - - -
883A SER 4.1 0.7 - - - -
884A GLU* 2.5 35.4 + - - -
887A LYS* 3.9 25.9 - - + +
888A LEU* 1.3 76.5 - - - +
890A LEU* 1.3 81.5 + - + +
891A VAL 2.9 2.0 + - - -
892A PHE* 3.1 29.4 + - - +
897A LEU* 4.6 8.1 - - + +
975B LYS* 4.0 6.5 - - - -
976B LEU* 4.4 3.4 - - + -
979B LEU* 3.4 42.0 - - + -
992B ILE* 3.8 11.9 - - + +
----------------------------------------------------------
Back to top of page
Residues in contact with LEU 890 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
850A ARG* 6.2 0.2 - - - +
851A LYS* 5.4 2.1 - - - +
887A LYS* 3.1 40.9 + - + +
888A LEU 3.0 1.8 + - - -
889A TYR* 1.3 99.2 - - + +
891A VAL* 1.3 64.3 + - + +
892A PHE 3.3 4.3 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with VAL 891 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
850A ARG* 2.9 73.8 - - + +
851A LYS* 3.5 25.0 - - + +
854A LEU* 4.1 9.0 - - + -
855A PRO* 3.8 17.5 - - + +
888A LEU* 2.9 12.2 + - - +
890A LEU* 1.3 85.9 - - + +
892A PHE* 1.3 61.9 + - + +
893A SER 4.0 0.9 + - - -
896A GLU* 4.3 1.0 - - - +
----------------------------------------------------------
Back to top of page
Residues in contact with PHE 892 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
821A LEU* 6.4 0.9 - - + -
854A LEU* 4.9 3.8 - - + -
855A PRO* 3.7 36.1 - - + -
858A CYS* 3.9 24.7 - - + -
859A PHE* 4.6 11.9 - + - -
881A VAL* 3.9 19.1 - - + -
888A LEU* 3.3 26.5 - - + -
889A TYR* 3.1 14.2 + - - +
890A LEU 4.3 3.6 - - - +
891A VAL* 1.3 84.8 - - + +
893A SER* 1.3 61.6 + - - +
896A GLU* 3.7 22.7 - - + -
897A LEU* 3.5 32.1 - - + +
900A LEU* 4.5 13.7 - - + -
----------------------------------------------------------
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