Contacts of the strand formed by residues 277 - 281 (chain A) in PDB entry 1DS1
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 THR 277 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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61A GLY* 3.1 44.0 - - - +
145A THR* 3.9 12.7 + - - -
174A VAL* 3.8 16.2 - - + -
175A ALA 3.1 10.3 - - - -
176A SER* 4.2 4.9 - - - -
230A LEU* 4.1 7.6 + - - +
272A VAL* 3.0 17.5 - - - +
273A ASP* 2.6 21.1 + - + +
274A ASN* 4.3 9.5 - - - +
275A PHE 3.9 0.2 - - - -
276A ARG* 1.3 84.8 - - - +
278A THR* 1.3 58.7 + - - +
279A HIS* 5.1 0.5 + - - -
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Residues in contact with THR 278 (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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143A PHE* 3.4 28.4 - - + +
144A HIS* 2.9 39.8 + - - -
145A THR* 3.2 7.6 + - - -
174A VAL* 3.4 5.0 - - - +
175A ALA* 3.0 45.3 + - + +
230A LEU* 4.1 5.3 - - - +
232A TYR* 3.8 10.5 + - + -
255A LEU* 4.3 15.5 - - + -
277A THR* 1.3 73.4 - - - +
279A HIS* 1.3 60.7 + - - +
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Residues in contact with HIS 279 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
143A PHE* 3.2 3.9 - - - -
144A HIS* 2.9 54.9 + + - -
145A THR* 5.1 0.2 - - - -
146A GLU* 3.0 22.0 + - + -
157A VAL* 4.4 14.2 - - + +
159A LEU* 5.1 6.3 - - + -
172A THR* 5.0 4.3 - - + -
173A LEU 3.0 13.9 - - - +
174A VAL* 4.4 9.6 - - + -
272A VAL* 4.2 21.0 - - + +
274A ASN* 4.5 2.9 + - - -
278A THR* 1.3 76.9 - - - +
280A ALA* 1.3 63.9 + - - +
330A AKG 3.0 27.5 + - + -
341A FE2 2.1 28.1 - - - -
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Residues in contact with ALA 280 (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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140A LEU* 5.0 3.1 - - + -
141A LEU* 3.1 19.3 - - - +
142A GLU* 4.3 1.3 - - - -
143A PHE* 3.6 28.0 - - + +
144A HIS* 4.8 3.8 - - - -
172A THR* 3.4 9.7 - - - +
173A LEU* 2.9 39.4 + - + +
279A HIS* 1.3 77.4 - - - +
281A ARG* 1.3 60.7 + - - +
330A AKG 4.8 3.0 - - - +
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Residues in contact with ARG 281 (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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134A SER 4.5 5.7 + - - -
136A THR* 3.3 31.6 + - - -
137A SER 3.2 20.0 + - - +
139A THR 2.8 29.1 + - - -
140A LEU* 3.4 4.6 - - - +
141A LEU* 2.9 44.8 + - + +
170A ALA* 4.1 3.6 - - + -
171A ALA 3.3 11.7 - - - +
280A ALA* 1.3 77.7 - - - +
282A THR* 1.3 84.2 + - - +
284A PHE* 3.6 13.8 - - - -
293A ARG* 3.6 19.5 - - - +
330A AKG 3.5 38.5 + - + +
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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
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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