Contacts of the helix formed by residues 668 - 675 (chain A) in PDB entry 2O36
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 668 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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294A PHE* 3.2 54.7 + - + +
297A GLU* 3.9 10.1 + - - +
298A LEU* 3.9 21.9 + - + +
301A LYS* 3.0 38.7 + - - +
617A VAL* 3.8 20.2 - - + -
618A TYR* 4.7 5.2 - - + +
667A LYS* 1.3 75.0 - - - +
669A ASP* 1.3 65.9 + - - +
670A ALA 3.4 0.9 - - - -
671A PHE* 3.0 15.5 + - - +
672A LEU* 3.0 19.9 + - + +
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Residues in contact with ASP 669 (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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301A LYS* 5.0 6.6 + - - -
667A LYS* 3.2 42.0 + - + +
668A GLN* 1.3 79.0 + - - +
670A ALA* 1.3 63.1 + - - +
672A LEU* 3.2 11.2 + - - +
673A LEU* 2.9 36.1 + - + +
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Residues in contact with ALA 670 (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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620A MET* 3.4 35.1 - - + +
621A ASP* 3.5 24.9 + - + +
624A HIS* 4.0 19.0 - - + +
625A THR* 5.3 0.2 - - - +
667A LYS 4.5 1.6 + - - -
668A GLN 3.4 0.6 - - - -
669A ASP* 1.3 78.4 - - - +
671A PHE* 1.3 63.8 + - - +
673A LEU* 3.3 10.3 + - - +
674A SER* 3.0 19.4 + - - -
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Residues in contact with PHE 671 (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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298A LEU* 4.0 24.7 - - + -
302A LEU* 4.8 7.0 - - + -
551A ASN* 4.0 24.0 - - - -
613A LEU* 5.4 1.6 - - + -
616A GLU* 3.5 32.3 - - + -
617A VAL* 3.8 52.9 + - + +
620A MET* 3.6 17.5 - - + +
668A GLN 3.0 9.9 + - - +
670A ALA* 1.3 77.4 - - - +
672A LEU* 1.3 66.1 + - + +
674A SER* 2.6 23.4 + - - -
675A LYS* 3.3 41.6 - - + +
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Residues in contact with LEU 672 (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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298A LEU* 4.1 22.4 - - + -
301A LYS* 3.1 58.6 - - + +
302A LEU* 4.9 3.6 - - + -
668A GLN* 3.0 18.9 + - + +
669A ASP* 3.6 10.5 - - - +
671A PHE* 1.3 77.8 - - + +
673A LEU* 1.3 64.4 + - + +
675A LYS* 3.0 18.4 + - - +
677A LEU* 3.0 41.3 + - + +
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Residues in contact with LEU 673 (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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624A HIS* 4.8 18.6 - - + +
669A ASP* 2.9 27.7 + - + +
670A ALA* 3.7 6.7 - - - +
672A LEU* 1.3 77.5 - - + +
674A SER* 1.3 58.4 + - - +
676A GLY* 2.8 21.2 + - - +
677A LEU 4.3 18.2 - - - +
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Residues in contact with SER 674 (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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543A ARG* 5.9 3.1 - - - -
544A GLN* 3.0 25.0 + - - +
620A MET* 4.1 25.6 - - - +
670A ALA 3.0 13.6 + - - -
671A PHE* 2.6 25.3 + - - -
673A LEU* 1.3 75.3 - - - +
675A LYS* 1.3 67.8 + - - +
676A GLY 3.2 0.8 + - - -
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Residues in contact with LYS 675 (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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302A LEU* 4.7 9.6 - - + -
305A LEU* 4.3 22.1 - - + +
543A ARG* 5.5 6.1 + - - +
544A GLN* 3.4 23.6 + - - +
547A THR* 2.8 32.6 + - + +
551A ASN* 4.0 5.8 - - - +
616A GLU* 4.4 6.3 + - - -
671A PHE* 3.3 53.2 - - + +
672A LEU* 3.0 11.2 + - - +
674A SER* 1.3 85.3 + - - +
676A GLY* 1.3 60.9 + - - +
677A LEU* 4.2 14.3 - - + +
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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