Contacts of the helix formed by residues 449 - 453 (chain A) in PDB entry 4OQT
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 449 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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399A GLU* 4.5 18.2 + - - +
400A GLY* 4.3 4.1 + - - -
434A ARG* 3.6 27.0 + - - +
447A TYR* 2.4 31.9 - - - +
448A ALA* 1.3 76.9 - - - +
450A VAL* 1.3 69.3 + - + +
451A GLN* 4.1 17.5 - - + +
452A ASP* 2.8 22.4 + - - +
475A VAL* 3.4 14.8 - - - +
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Residues in contact with VAL 450 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
399A GLU* 3.2 24.0 + - - +
449A GLN* 1.3 74.1 - - + +
451A GLN* 1.3 66.2 + - + +
452A ASP 3.0 1.2 + - - -
453A ASN* 3.0 21.5 + - + +
475A VAL* 3.9 14.3 - - + +
477A SER* 3.6 21.5 - - - +
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Residues in contact with GLN 451 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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422A PRO* 5.0 1.0 - - - +
423A ARG* 3.6 48.5 + - - +
434A ARG* 3.6 21.9 - - - +
449A GLN* 4.2 15.0 - - + -
450A VAL* 1.3 79.9 - - + +
452A ASP* 1.3 68.4 + - - +
453A ASN 3.3 6.0 + - - +
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Residues in contact with ASP 452 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
422A PRO* 3.8 2.9 - - - +
423A ARG* 4.7 7.1 + - - -
434A ARG* 2.6 45.1 + - - -
435A LEU* 4.9 7.1 - - - +
445A VAL* 3.4 16.9 - - + +
449A GLN* 2.8 19.5 + - - +
451A GLN* 1.3 84.9 + - - +
453A ASN* 1.3 65.8 + - - +
456A TYR* 2.7 35.7 + - - +
473A LEU* 3.2 14.9 - - + +
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Residues in contact with ASN 453 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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422A PRO* 3.5 13.1 - - - +
449A GLN 3.6 2.4 + - - -
450A VAL* 3.0 17.7 + - + +
451A GLN 4.1 3.5 - - - +
452A ASP* 1.3 79.4 - - - +
454A GLY* 1.3 65.3 + - - +
473A LEU 3.3 5.8 - - - +
474A HIS* 3.5 1.0 - - - -
475A VAL* 2.9 41.3 + - + +
1E NAG 1.5 69.3 + - + +
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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