Contacts of the helix formed by residues 286 - 293 (chain A) in PDB entry 2OB1
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 MET 286 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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80A LEU* 3.1 45.6 - - + +
81A ARG* 3.8 7.4 - - - +
84A GLY* 4.7 3.8 - - - -
231A TYR* 3.7 16.2 - - + -
285A ASP* 1.3 73.5 - - - +
287A TRP* 1.3 57.5 + - - +
289A ILE* 3.2 30.1 + - + +
290A PHE* 2.9 28.8 + - - +
318A GLN* 3.1 30.5 + - - +
321A TYR* 2.9 34.1 + - + +
323A LEU* 3.9 19.7 - - + -
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Residues in contact with TRP 287 (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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285A ASP* 3.1 8.6 + - - +
286A MET* 1.3 75.9 - - - +
288A GLU* 1.3 68.3 + - + +
290A PHE* 3.2 34.5 + + + +
291A ASN* 3.1 55.6 + - - +
311A LEU* 3.7 36.8 - - + -
314A LEU* 4.1 8.7 - - + -
315A LYS* 3.5 69.4 - - + +
318A GLN* 3.4 9.0 + - + +
319A THR* 3.5 21.8 - - + +
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Residues in contact with GLU 288 (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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268A LYS* 2.9 30.6 + - - -
284A ASN* 3.2 22.1 - - - +
285A ASP* 2.8 49.8 + - - +
287A TRP* 1.3 80.1 - - + +
289A ILE* 1.3 57.9 + - - +
291A ASN* 3.3 5.6 + - - +
292A ALA* 2.9 35.6 + - + +
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Residues in contact with ILE 289 (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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80A LEU* 4.4 10.8 - - + +
84A GLY* 4.7 8.5 - - - -
284A ASN* 3.9 17.5 - - + +
285A ASP 3.2 8.6 + - - +
286A MET* 3.2 44.9 + - + +
288A GLU* 1.3 76.2 - - - +
290A PHE* 1.3 61.2 + - - +
292A ALA* 5.0 0.2 - - - -
293A GLN* 2.7 66.8 + - + +
294A ILE* 3.4 7.4 + - + -
323A LEU* 3.7 29.2 - - + -
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Residues in contact with PHE 290 (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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76A TYR* 3.9 31.0 - + - -
79A TYR* 5.6 0.7 - + - -
80A LEU* 3.8 26.5 - - + -
286A MET 2.9 14.1 + - - +
287A TRP* 3.4 42.8 - + + +
289A ILE* 1.3 76.6 - - - +
291A ASN* 1.3 64.0 + - - +
294A ILE* 3.4 21.9 - - + +
299A ARG* 2.7 60.9 + - + -
302A LEU* 5.2 2.7 - - + -
308A LEU* 5.6 0.4 - - + -
311A LEU* 4.2 11.0 - - + -
314A LEU* 4.2 9.2 - - + -
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Residues in contact with ASN 291 (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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287A TRP* 3.1 59.1 + - - +
288A GLU* 4.0 4.6 - - - +
290A PHE* 1.3 94.0 - - - +
292A ALA* 1.3 59.4 + - + +
294A ILE 4.9 0.2 - - - +
299A ARG* 3.4 21.4 + - - +
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Residues in contact with ALA 292 (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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288A GLU* 2.9 17.4 + - + +
289A ILE* 5.0 0.2 - - - -
291A ASN* 1.3 80.3 - - - +
293A GLN* 1.3 65.9 + - + +
294A ILE 3.6 1.6 - - - -
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Residues in contact with GLN 293 (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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30A LEU* 4.2 8.7 - - - +
84A GLY* 4.8 7.8 - - - +
87A ALA* 4.5 17.0 - - - +
284A ASN* 4.8 9.5 - - - +
289A ILE* 2.7 54.9 + - + +
292A ALA* 1.3 79.5 - - + +
294A ILE* 1.3 64.3 + - + +
295A PRO* 3.3 10.7 - - - +
323A LEU* 5.6 2.9 - - - +
325A LYS* 4.6 14.6 - - - +
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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