Contacts of the helix formed by residues 638 - 644 (chain A) in PDB entry 2JED
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 ASN 638 (chain A).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
636A GLU 3.7 4.2 + - - +
637A ILE* 1.3 70.9 - - - +
639A TRP* 1.3 58.2 + - - +
640A GLU* 3.2 19.2 + - - +
641A GLU* 3.0 50.0 + - + +
642A LEU* 3.0 28.6 + - - +
647A ILE* 3.5 9.0 - - + +
----------------------------------------------------------
Back to top of page
Residues in contact with TRP 639 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
486A ALA* 3.4 44.9 - - + -
489A ILE* 3.9 22.9 - - + -
490A LEU* 3.7 24.7 - - + +
629A ARG* 3.2 62.7 + - + +
630A GLN* 5.9 1.1 - - - -
634A PHE* 3.5 30.3 + + + -
637A ILE* 3.6 27.1 + - + +
638A ASN* 1.3 70.4 + - - +
640A GLU* 1.3 80.0 + - - +
642A LEU* 3.9 6.1 - - + +
643A GLU* 3.1 25.8 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with GLU 640 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
629A ARG* 4.7 6.1 + - - -
638A ASN* 3.2 14.9 + - - +
639A TRP* 1.3 92.4 + - - +
641A GLU* 1.3 62.1 + - - +
643A GLU* 3.4 7.0 + - - +
644A ARG* 3.2 46.4 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with GLU 641 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
638A ASN* 3.0 40.7 + - - +
640A GLU* 1.3 73.1 - - - +
642A LEU* 1.3 61.4 + - - +
644A ARG* 3.3 11.2 + - - +
645A LYS 3.1 3.8 + - - -
646A GLU* 2.8 65.5 + - + +
647A ILE* 4.1 15.8 - - + +
----------------------------------------------------------
Back to top of page
Residues in contact with LEU 642 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
440A PHE* 3.3 16.8 - - - -
483A PHE* 3.8 23.6 - - + -
486A ALA* 3.5 36.1 - - + -
487A GLU* 3.8 23.7 - - + +
490A LEU* 3.6 20.6 - - + -
517A HIS* 5.8 0.4 - - + -
637A ILE* 3.9 13.7 - - + -
638A ASN 3.0 18.4 + - - +
639A TRP* 3.9 8.1 - - + +
641A GLU* 1.3 76.7 - - - +
643A GLU* 1.3 56.7 + - - +
645A LYS* 3.0 17.0 + - - -
646A GLU 4.8 0.4 - - - +
647A ILE* 3.7 23.7 - - + +
----------------------------------------------------------
Back to top of page
Residues in contact with GLU 643 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
438A HIS* 2.9 35.9 - - + +
439A PRO* 3.5 23.1 - - + +
440A PHE* 4.2 2.7 - - - -
490A LEU* 3.8 30.9 - - + +
494A PHE* 5.3 0.5 - - - +
629A ARG* 4.9 7.8 + - - -
639A TRP 3.1 18.5 + - - +
640A GLU* 3.9 5.9 - - - +
641A GLU 3.3 0.4 - - - -
642A LEU* 1.3 76.7 - - - +
644A ARG* 1.3 59.5 + - + +
645A LYS* 3.2 1.7 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with ARG 644 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
640A GLU* 3.2 30.0 + - - +
641A GLU* 3.3 18.5 + - - +
642A LEU 3.2 0.4 - - - -
643A GLU* 1.3 76.1 - - + +
645A LYS* 1.3 71.5 + - - +
646A GLU* 3.0 47.4 + - - +
----------------------------------------------------------
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