Contacts of the helix formed by residues 675 - 682 (chain D) in PDB entry 4AY6
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 PRO 675 (chain D).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
671D GLN* 3.2 28.7 - - + +
672D GLU 3.8 4.7 - - - +
673D THR 3.5 8.5 - - - +
674D SER* 1.4 88.8 - - - +
676D ALA* 1.3 60.7 + - - +
677D GLU* 3.2 23.8 - - - +
678D VAL* 2.9 44.8 + - + +
679D ALA 3.8 0.5 + - - -
688D TYR* 3.7 2.7 - - - +
944D ARG* 3.8 19.3 - - - +
----------------------------------------------------------
Back to top of page
Residues in contact with ALA 676 (chain D).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
671D GLN* 5.4 1.8 - - - +
674D SER 4.4 0.2 - - - -
675D PRO* 1.3 68.6 - - - +
677D GLU* 1.3 72.9 + - - +
679D ALA* 3.0 26.1 + - + +
686D LEU* 4.7 2.7 - - + -
688D TYR* 3.3 14.5 + - + +
1027D ILE* 5.0 16.4 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with GLU 677 (chain D).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
675D PRO* 3.6 22.4 - - - +
676D ALA* 1.3 85.2 + - - +
678D VAL* 1.3 69.3 + - + +
679D ALA 3.5 2.1 + - - -
680D GLU* 4.6 6.9 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with VAL 678 (chain D).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
673D THR 5.2 1.3 - - - +
674D SER* 4.3 6.3 - - - -
675D PRO* 2.9 45.9 + - + +
677D GLU* 1.3 88.2 - - + +
679D ALA* 1.3 57.6 + - - -
680D GLU* 3.0 7.9 - - - +
681D GLN* 3.1 48.5 + - + +
682D TYR* 3.7 7.1 - - + +
939D GLU* 5.0 8.5 - - + +
944D ARG* 5.8 0.9 - - - -
----------------------------------------------------------
Back to top of page
Residues in contact with ALA 679 (chain D).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
675D PRO 3.8 0.4 + - - -
676D ALA* 3.0 20.3 + - + +
677D GLU 3.3 1.2 + - - -
678D VAL* 1.3 77.2 - - - +
680D GLU* 1.3 58.7 + - - +
681D GLN 3.1 2.0 + - - -
682D TYR* 3.3 28.7 + - - +
684D GLU 5.1 1.9 - - - +
686D LEU* 4.0 23.6 - - + +
1025D HIS* 4.3 19.6 - - + +
----------------------------------------------------------
Back to top of page
Residues in contact with GLU 680 (chain D).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
507D HIS* 5.4 2.2 - - - +
508D GLY* 5.9 0.5 - - - -
511D LYS* 2.9 35.1 + - - +
677D GLU 4.6 5.4 + - - +
678D VAL* 3.0 2.6 - - - -
679D ALA* 1.3 77.3 - - - +
681D GLN* 1.3 58.5 + - - +
682D TYR 3.3 1.3 - - - -
----------------------------------------------------------
Back to top of page
Residues in contact with GLN 681 (chain D).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
507D HIS* 3.4 51.9 + - + +
511D LYS* 3.6 15.0 + - - +
658D THR* 3.5 18.2 - - - +
678D VAL* 3.2 40.0 - - + +
679D ALA 3.1 0.2 - - - -
680D GLU* 1.3 79.5 - - - +
682D TYR* 1.3 81.6 + - + +
939D GLU* 3.4 24.7 + - - +
940D THR* 4.3 1.8 - - - +
941D LEU 4.3 6.7 - - - +
----------------------------------------------------------
Back to top of page
Residues in contact with TYR 682 (chain D).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
511D LYS* 3.9 9.0 + - - +
657D GLY* 5.1 0.7 - - - -
658D THR* 3.8 23.1 - - + -
667D ILE* 4.1 16.4 - - + -
673D THR 4.1 0.9 + - - -
674D SER* 2.9 38.9 + - - -
678D VAL* 3.7 22.7 - - + +
679D ALA* 3.3 15.5 + - - +
680D GLU* 3.3 2.8 - - - +
681D GLN* 1.3 95.8 + - + +
683D SER* 1.3 62.3 + - - +
684D GLU* 3.4 21.4 - - - +
686D LEU* 3.7 19.3 - - + -
941D LEU* 3.3 42.3 + - + +
----------------------------------------------------------
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