Contacts of the strand formed by residues 257 - 261 (chain R) in PDB entry 2X1X
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 ASP 257 (chain R).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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148E THR* 4.9 0.4 - - - -
149E ASN* 4.0 12.1 + - + +
190E VAL 3.7 6.7 + - - +
191E PRO* 3.7 29.0 - - + +
256R ILE* 1.3 76.5 - - - +
258R PHE* 1.3 63.0 + - - +
259R ASN* 2.8 26.1 + - - +
308R ALA 3.7 1.7 - - - +
310R SER* 3.0 37.9 + - - +
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Residues in contact with PHE 258 (chain R).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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148E THR* 4.5 14.6 - - + -
246R CYS* 4.3 7.4 - - - -
248R ALA* 4.4 5.8 - - + -
256R ILE* 4.2 9.9 - - + -
257R ASP* 1.3 78.4 + - - +
259R ASN* 1.3 71.0 + - - +
260R TRP* 4.4 8.3 - - + +
272R LEU* 5.6 4.7 - - + +
274R ASN* 4.0 22.0 + - + +
288R PHE* 4.0 30.7 - - + -
289R LEU 4.2 5.4 - - - -
290R SER* 3.5 49.4 - - - +
307R CYS* 3.9 17.0 - - - -
308R ALA 3.2 14.8 - - - -
309R ALA* 4.2 18.2 - - + -
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Residues in contact with ASN 259 (chain R).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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257R ASP* 2.8 27.7 + - - +
258R PHE* 1.3 74.2 - - - +
260R TRP* 1.3 66.3 + - - +
261R GLU* 5.5 0.2 - - - +
272R LEU* 6.3 0.2 - - - -
306R THR 3.8 1.4 - - - +
308R ALA* 2.9 45.2 + - + +
310R SER* 5.9 2.0 - - - +
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Residues in contact with TRP 260 (chain R).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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228R LEU* 3.7 10.8 - - + -
244R LEU* 3.7 38.8 - - + -
246R CYS* 3.3 28.9 - - + -
258R PHE* 4.4 7.5 - - + +
259R ASN* 1.3 80.6 + - - +
261R GLU* 1.3 67.2 + - - +
262R TYR* 4.1 23.5 - + + -
272R LEU* 3.4 32.0 - - + +
290R SER* 3.0 33.1 + - - -
292R LEU* 4.2 21.3 - - + -
305R TYR* 4.8 4.3 - - + -
306R THR 3.4 9.6 - - - -
307R CYS* 3.7 33.3 - - + -
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Residues in contact with GLU 261 (chain R).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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260R TRP* 1.3 80.0 - - - +
262R TYR* 1.3 73.9 + - - +
265R SER* 4.1 13.6 + - - -
304R LEU 3.4 3.0 - - - +
305R TYR* 3.3 4.2 - - - +
306R THR* 2.7 53.7 + - - +
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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