Contacts of the helix formed by residues 307 - 312 (chain B) in PDB entry 5IFM
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 HIS 307 (chain B).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
252A GLU* 4.9 2.8 + - + -
253A GLN* 3.2 36.4 + - + +
263A PHE* 5.3 14.6 - + + -
217B THR* 4.9 13.2 - - + -
303B ALA 4.3 1.5 + - - +
304B ARG* 2.9 19.9 + - + +
306B GLU* 1.4 76.8 - - - +
308B GLN* 1.3 62.4 + - - +
309B VAL* 3.1 9.2 + - - +
310B MET* 3.9 5.5 + - - +
311B LEU* 3.6 42.8 + - + +
----------------------------------------------------------
Back to top of page
Residues in contact with GLN 308 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
249A LYS* 5.8 8.0 - - + +
252A GLU* 3.7 31.8 + - - +
304B ARG 4.6 1.2 + - - -
305B HIS 5.4 1.2 - - - -
307B HIS* 1.3 76.8 - - - +
309B VAL* 1.4 61.3 + - - +
310B MET 3.2 3.8 - - - -
311B LEU* 3.3 36.6 - - + +
312B MET* 3.2 66.3 + - + +
106E HIS* 6.3 0.4 - - - -
198E LYS* 5.5 1.3 - - - +
----------------------------------------------------------
Back to top of page
Residues in contact with VAL 309 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
305B HIS 3.9 2.0 - - - +
306B GLU* 3.4 44.6 - - + +
307B HIS 3.1 1.4 - - - +
308B GLN* 1.4 74.0 - - - +
310B MET* 1.4 67.4 + - + +
312B MET 5.1 4.3 - - - -
198E LYS* 3.5 36.5 + - + +
199E PRO* 3.5 48.7 - - + +
202E ARG* 5.9 2.7 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with MET 310 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
307B HIS 3.9 3.7 + - - +
308B GLN 3.2 0.2 - - - -
309B VAL* 1.4 89.1 - - + +
311B LEU* 1.4 64.6 + - - +
312B MET 3.5 6.2 - - - -
199E PRO* 3.8 26.7 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with LEU 311 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
252A GLU* 4.5 6.5 - - - +
307B HIS* 3.6 51.1 + - + +
308B GLN* 3.3 38.2 + - - +
310B MET* 1.4 78.5 - - - +
312B MET* 1.4 60.1 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with MET 312 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
308B GLN* 3.2 46.9 + - + +
309B VAL 5.1 4.0 - - - -
310B MET* 4.5 6.3 - - - -
311B LEU* 1.4 80.3 - - - +
75E ARG* 3.6 35.8 + - - +
102E GLU* 5.2 5.2 - - - +
104E PHE* 5.0 15.9 - - + -
111E PHE* 6.0 0.4 - - - -
113E PHE* 4.1 24.0 - - + -
147E SER* 6.5 1.1 - - - -
----------------------------------------------------------
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