Contacts of the helix formed by residues 477 - 481 (chain B) in PDB entry 2IAG
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 ASP 477 (chain B).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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215B PRO* 5.9 0.3 - - - +
475B GLU 3.8 1.4 + - - -
476B PHE* 1.3 67.2 - - - +
478B LEU* 1.3 64.1 + - - +
479B SER* 2.5 33.0 + - - -
480B ARG* 3.1 33.2 + - + +
486B MET* 3.5 5.4 - - - +
487B GLN* 2.9 23.9 + - + +
488B PRO 4.4 8.1 - - - +
489B GLU* 3.8 10.8 - - - +
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Residues in contact with LEU 478 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
47B GLY 4.6 2.9 - - - +
48B LYS* 3.4 25.7 - - - +
49B ASP* 3.9 24.3 - - + +
50B ALA 5.1 0.2 + - - -
475B GLU* 4.4 16.2 - - + +
476B PHE* 3.1 17.8 + - + +
477B ASP* 1.3 72.1 + - - +
479B SER* 1.3 56.6 + - - +
480B ARG 3.1 6.2 + - - -
481B TYR* 3.4 48.4 + - + +
486B MET* 4.5 3.4 - - - -
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Residues in contact with SER 479 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
47B GLY 4.7 4.5 - - - -
48B LYS 4.9 0.4 + - - -
215B PRO* 3.6 26.6 - - - +
216B LYS* 5.1 10.6 - - - +
219B ARG* 3.2 40.2 + - - +
477B ASP* 2.5 26.4 + - - -
478B LEU* 1.3 77.7 - - - +
480B ARG* 1.3 58.8 + - - +
481B TYR 3.5 2.5 + - - +
483B PHE* 3.7 8.0 - - - -
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Residues in contact with ARG 480 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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211B ASP* 2.2 52.1 + - - -
212B ARG* 3.5 11.5 + - - +
214B LEU* 5.1 3.4 - - - +
215B PRO* 3.6 23.1 - - + +
282B TRP* 5.3 3.4 - - - +
477B ASP* 3.4 32.0 + - + +
478B LEU 3.1 1.8 - - - -
479B SER* 1.3 79.6 - - - +
481B TYR* 1.3 65.5 + - - +
482B GLY 3.3 0.3 + - - -
483B PHE* 3.2 38.5 + - + +
484B GLY 4.5 2.1 + - - -
485B LEU 4.5 6.4 - - - +
486B MET* 3.8 18.8 - - + +
487B GLN* 3.6 49.1 + - - +
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Residues in contact with TYR 481 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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49B ASP* 3.4 20.8 + - - -
50B ALA* 3.7 32.8 - - + +
51B ALA* 3.4 17.4 - - + +
354B ALA* 3.7 11.2 - - + -
356B PHE* 3.6 12.2 - - - -
386B PHE* 3.8 13.5 - + + -
388B PHE* 3.8 27.3 - + - -
475B GLU* 5.2 0.5 + - - -
476B PHE* 3.6 16.3 - + - -
478B LEU* 3.4 36.5 - - + +
479B SER 3.5 4.2 - - - +
480B ARG* 1.3 77.3 - - - +
482B GLY* 1.3 59.8 + - - +
483B PHE* 4.1 8.1 - - - -
486B MET* 3.6 30.0 - - + -
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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
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Atomic class I II III IV V VI VII VIII
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I (Hydrophilic) + + + - + + + +
II (Acceptor) + - + - + + + -
III (Donor) + + - - + + - +
IV (Hydrophobic) - - - + + + + +
V (Aromatic) + + + + + + + +
VI (Neutral) + + + + + + + +
VII (Neutral-donor) + + - + + + - +
VIII (Neutral-acceptor) + - + + + + + -
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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