Contacts of the helix formed by residues 706 - 711 (chain B) in PDB entry 1TWF
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 GLN 706 (chain B).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
810A PRO* 5.2 4.4 - - - +
811A GLN* 5.1 2.0 + - - +
27B ALA* 6.3 0.2 - - + -
704B ALA* 4.0 3.3 - - - +
705B MET* 1.3 109.2 - - + +
707B PRO* 1.3 73.4 - - + +
708B GLU* 2.9 18.4 - - + +
709B ASP* 2.7 46.6 + - - +
730B ARG* 4.1 33.3 + - - +
741B CYS* 3.8 5.8 - - - -
745B PRO* 6.1 4.5 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with PRO 707 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
25B ILE* 4.7 12.9 - - + +
26B THR 4.3 3.8 - - - +
27B ALA* 4.0 23.6 - - + +
30B SER* 4.9 7.4 - - - +
638B PHE* 5.4 2.9 - - + -
650B GLU* 4.8 2.8 - - - +
651B LEU* 3.6 25.5 - - + +
705B MET 4.5 1.3 - - - +
706B GLN* 1.3 82.6 - - + +
708B GLU* 1.3 81.5 + - + +
709B ASP 3.2 1.4 + - - -
710B LEU* 3.5 24.5 - - + +
741B CYS* 3.5 17.4 - - - -
742B GLU 4.8 4.0 - - - +
743B ILE 5.6 0.7 - - - +
----------------------------------------------------------
Back to top of page
Residues in contact with GLU 708 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
25B ILE 5.4 5.6 - - - +
26B THR* 5.2 3.1 - - - -
27B ALA* 3.6 25.5 - - - +
706B GLN* 2.9 11.6 - - + +
707B PRO* 1.3 107.6 - - + +
709B ASP* 1.3 55.2 + - - +
710B LEU 3.0 10.4 + - - -
711B GLU* 3.5 38.9 + - - +
733B HIS* 6.1 0.2 - - - -
----------------------------------------------------------
Back to top of page
Residues in contact with ASP 709 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
704B ALA* 4.1 12.8 - - + -
705B MET* 3.7 5.5 + - - +
706B GLN* 2.7 63.0 + - - +
708B GLU* 1.3 78.2 - - - +
710B LEU* 1.3 60.6 + - - +
711B GLU 3.6 2.5 - - - -
731B VAL 5.4 3.3 - - - +
733B HIS* 4.1 27.5 + - + +
735B ALA 5.1 0.2 - - - +
738B PHE* 3.1 25.9 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with LEU 710 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
640B VAL* 3.9 20.0 - - + -
648B HIS* 3.2 18.1 - - + +
649B LYS* 3.8 15.5 - - + +
650B GLU* 3.6 27.8 - - - +
651B LEU* 3.2 37.9 - - + +
704B ALA* 4.5 8.1 - - + -
707B PRO* 3.5 15.3 - - + +
708B GLU 3.0 0.8 - - - -
709B ASP* 1.3 81.7 - - - +
711B GLU* 1.3 66.3 + - - +
712B PRO* 3.1 5.2 - - - +
733B HIS* 5.2 1.3 - - - -
738B PHE* 3.6 28.9 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with GLU 711 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
648B HIS* 3.9 8.7 + - + +
708B GLU* 3.5 36.2 + - - +
710B LEU* 1.3 76.9 - - - +
712B PRO* 1.3 68.6 - - + +
733B HIS* 3.0 23.0 + - - -
----------------------------------------------------------
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