Contacts of the helix formed by residues 252 - 257 (chain W) in PDB entry 1O1F
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 252 (chain W).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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196W ARG* 3.5 19.1 + - - -
227W MET* 5.7 1.3 - - - -
230W ALA* 3.3 41.4 + - + +
233W SER* 5.0 1.8 + - - -
236W LEU* 3.9 12.2 - - - +
237W GLU* 4.0 9.8 + - - +
251W GLY* 1.3 74.6 - - - +
253W GLU* 1.4 57.4 + - - +
254W ARG* 2.8 16.2 + - - +
255W PHE* 3.1 36.6 + - + -
256W ARG* 3.8 13.8 - - - +
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Residues in contact with GLU 253 (chain W).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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189W LEU* 4.6 5.0 - - + +
192W ILE* 3.6 27.7 - - + +
193W LEU* 4.1 17.5 - - + -
196W ARG* 3.3 40.7 + - - +
250W ILE* 3.5 12.6 - - + -
251W GLY 3.0 28.4 + - - -
252W ASN* 1.4 71.5 + - - +
254W ARG* 1.3 64.8 + - - +
255W PHE 3.1 0.9 - - - -
256W ARG* 3.0 44.3 + - - +
257W CYS* 3.1 17.8 + - - +
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Residues in contact with ARG 254 (chain W).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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189W LEU* 5.7 0.2 - - - -
215W LYS 5.4 0.2 + - - -
216W LEU* 2.9 33.5 + - + +
217W CYS* 2.9 30.8 - - - +
218W TYR* 3.1 58.1 + - + +
236W LEU 3.1 21.7 + - - -
237W GLU 4.3 0.2 + - - -
238W LYS* 3.5 32.1 - - - +
250W ILE* 3.6 25.7 - - + +
251W GLY 3.1 26.2 - - - +
252W ASN 3.5 0.9 - - - +
253W GLU* 1.3 74.0 - - - +
255W PHE* 1.4 58.6 + - + +
258W PRO* 3.7 1.9 - - - +
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Residues in contact with PHE 255 (chain W).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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218W TYR* 3.4 23.3 - - + +
220W ALA* 4.4 3.4 - - + -
223W PHE* 3.0 50.7 - + + -
226W GLU* 3.4 54.3 - - + -
227W MET* 3.3 35.9 - - + -
230W ALA* 4.8 1.8 - - + -
236W LEU* 4.5 10.1 - - + -
251W GLY 5.1 1.1 - - - -
252W ASN* 3.1 30.9 + - - -
253W GLU 3.1 0.4 - - - -
254W ARG* 1.4 78.0 - - + +
256W ARG* 1.3 70.2 + - + +
257W CYS 3.1 2.5 - - - -
258W PRO* 3.6 1.0 - - - +
259W GLU* 3.1 16.2 + - - +
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Residues in contact with ARG 256 (chain W).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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188W TYR* 3.3 22.9 + - - +
191W LYS* 5.9 0.2 - - - +
192W ILE* 3.6 44.8 + - + +
195W GLU* 3.7 14.5 + - - -
196W ARG* 6.0 0.4 - - - +
227W MET* 3.7 33.0 - - + +
252W ASN* 3.8 9.2 - - - +
253W GLU* 3.0 45.5 + - - +
255W PHE* 1.3 85.3 - - + +
257W CYS* 1.3 59.4 + - - +
259W GLU* 4.0 7.6 - - - -
260W THR* 3.4 2.6 + - - -
266W PHE* 3.3 22.1 - - + -
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Residues in contact with CYS 257 (chain W).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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185W LEU* 3.2 40.3 - - - +
188W TYR* 3.8 9.6 - - - -
189W LEU* 3.8 17.0 - - + -
192W ILE* 4.0 7.8 - - + +
213W LYS* 4.2 17.3 - - - -
217W CYS* 4.2 10.3 - - - -
253W GLU 3.1 13.3 + - - +
255W PHE 3.1 0.6 - - - -
256W ARG* 1.3 75.7 - - - +
258W PRO* 1.3 69.6 - - + +
260W THR* 2.6 27.7 + - - -
306W TYR* 5.1 0.4 - - - -
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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