Contacts of the strand formed by residues 284 - 287 (chain A) in PDB entry 1W31
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 ILE 284 (chain A).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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260A ILE* 3.6 18.6 - - + +
262A VAL* 4.3 17.3 - - + -
272A MET* 4.2 8.7 - - + +
275A ALA* 3.3 12.6 - - + +
276A SER* 3.3 44.4 - - - +
279A CYS* 4.3 7.9 - - + +
280A LYS* 5.8 0.2 - - - -
282A LEU 3.4 7.7 + - - +
283A PRO* 1.3 76.5 - - - +
285A CYS* 1.3 67.5 + - - +
322A GLY 4.1 6.7 + - - +
323A ALA* 3.4 24.1 - - + +
324A ARG* 2.9 32.4 + - - +
325A LEU* 3.3 6.5 + - - +
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Residues in contact with CYS 285 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
42A ILE* 4.1 6.5 - - - -
205A LEU* 4.3 9.9 - - + -
260A ILE 2.7 16.3 + - - +
261A ILE* 3.2 13.7 - - + -
262A VAL* 2.8 29.6 + - - +
284A ILE* 1.3 78.9 - - - +
286A ALA* 1.3 68.1 + - - +
325A LEU* 3.5 26.9 - - + -
327A ILE* 3.7 37.9 - - - -
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Residues in contact with ALA 286 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
262A VAL 3.8 4.3 - - - -
265A SER* 4.0 2.2 - - - -
272A MET* 3.7 33.9 - - + -
285A CYS* 1.3 75.3 - - - +
287A TYR* 1.3 60.5 + - - +
288A HIS 3.8 1.0 + - - -
318A PHE* 3.8 27.1 - - + -
323A ALA* 4.1 2.6 - - + +
325A LEU 3.0 13.1 + - - +
326A ILE* 3.5 2.5 - - + +
327A ILE 2.8 27.2 + - - +
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Residues in contact with TYR 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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44A PRO* 4.2 1.2 - - - +
89A PHE* 3.6 20.0 - + - -
207A TYR* 3.7 33.2 - + - -
261A ILE* 3.9 7.0 - - + -
262A VAL 3.0 10.2 + - - +
263A LYS* 3.5 22.2 - - + -
264A PRO 3.9 0.7 - - - -
265A SER* 3.4 17.5 + - - -
285A CYS 4.1 0.2 + - - -
286A ALA* 1.3 73.4 - - - +
288A HIS* 1.3 73.2 + - - +
289A VAL* 2.9 18.8 + - + +
327A ILE* 3.6 40.7 - - + +
329A TYR* 3.2 15.1 + + - -
363A SHO 2.9 45.6 + - + +
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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