Contacts of the strand formed by residues 238 - 241 (chain V) in PDB entry 1O18
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 LYS 238 (chain V).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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216V LEU* 3.8 34.3 - - + +
237V GLU* 1.3 82.5 + - - +
239V SER* 1.3 100.0 + - - +
240V TYR 3.9 0.7 + - - -
248V ILE 4.2 0.2 - - - +
249V THR* 4.2 0.9 + - - -
250V ILE* 2.6 45.7 + - - +
254V ARG* 3.5 30.3 - - - +
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Residues in contact with SER 239 (chain V).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
216V LEU* 4.9 2.3 - - - +
238V LYS* 1.3 94.6 + - - +
240V TYR* 1.3 60.7 + - - +
241V GLU 4.4 0.3 + - - -
247V VAL* 4.3 12.7 + - - +
248V ILE 2.7 18.8 + - - -
249V THR* 3.1 21.3 + - - -
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Residues in contact with TYR 240 (chain V).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
208V ILE* 3.2 38.3 - - + +
211V ASP* 2.9 31.2 + - - -
212V ILE* 3.9 29.4 - - + -
215V LYS* 4.1 16.7 + - + -
216V LEU* 3.9 28.7 - - + -
238V LYS 3.9 0.8 + - - -
239V SER* 1.3 73.3 - - - +
241V GLU* 1.3 78.5 + - - +
242V LEU* 4.1 4.3 - - + -
247V VAL* 3.6 3.3 - - - -
248V ILE* 2.9 43.5 + - + +
250V ILE* 5.1 0.9 - - + -
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Residues in contact with GLU 241 (chain V).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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3248 THR* 3.2 32.0 - - + +
208V ILE* 5.0 0.2 - - - +
239V SER 4.3 1.0 + - - -
240V TYR* 1.3 85.3 - - - +
242V LEU* 1.3 68.1 + - - +
245V GLY* 3.2 15.5 - - - +
247V VAL* 3.6 20.5 - - + +
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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
------------------------------------------------------------
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