Contacts of the helix formed by residues 256 - 260 (chain A) in PDB entry 3KDO
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 VAL 256 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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254A VAL* 3.1 16.5 + - + +
255A ASP* 1.3 71.4 - - - +
257A VAL* 1.3 75.3 + - + +
259A THR* 3.6 7.2 - - - -
260A GLY* 3.1 23.4 + - - +
264A LEU* 4.0 14.9 - - + +
278A ILE* 5.7 0.2 - - + -
280A GLY* 4.0 10.5 - - - -
281A HIS 3.1 18.2 + - - +
282A ARG* 4.5 1.8 - - - -
305A TYR* 3.5 41.7 + - + -
310A ILE* 3.9 29.2 - - + -
313A LEU* 4.6 5.8 - - + -
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Residues in contact with VAL 257 (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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255A ASP 3.4 0.6 - - - -
256A VAL* 1.3 79.4 - - + +
258A ILE* 1.3 64.7 + - - +
260A GLY* 3.6 8.7 + - - -
281A HIS 4.0 0.4 + - - -
282A ARG* 3.6 32.1 - - + +
283A ALA 3.6 15.9 - - - +
284A MET* 4.2 10.9 - - + +
285A HIS* 4.1 13.5 - - + +
288A PHE* 4.1 28.0 - - + -
301A LEU* 4.4 7.9 - - + -
305A TYR* 3.5 20.4 - - + +
260H GLY* 5.7 0.2 - - - -
261H TRP* 5.4 0.7 - - - -
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Residues in contact with ILE 258 (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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231A THR* 4.7 3.4 - - + -
255A ASP* 3.2 15.0 + - + +
257A VAL* 1.3 75.7 - - - +
259A THR* 1.3 70.1 - - - +
260A GLY* 3.2 0.5 + - - -
283A ALA* 3.6 23.3 + - + +
284A MET* 3.9 19.1 - - + -
102H PRO* 3.6 33.7 - - + +
105H LEU* 3.8 7.0 - - + +
106H ALA* 3.3 46.4 - - + +
260H GLY* 4.5 0.2 - - - -
261H TRP* 3.3 33.6 + - + +
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Residues in contact with THR 259 (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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231A THR* 5.1 4.4 - - - +
237A MET* 4.3 26.3 - - + -
254A VAL* 3.2 18.8 - - + +
255A ASP* 2.8 27.7 + - - +
256A VAL* 3.6 8.7 - - - -
258A ILE* 1.3 73.5 - - - +
260A GLY* 1.3 69.1 + - - +
263A ALA* 4.8 4.2 + - + -
264A LEU* 4.1 21.3 - - + +
267A ILE* 4.7 4.9 - - + -
102H PRO* 6.0 0.9 - - - -
259H THR 4.0 1.7 - - - +
260H GLY 3.5 1.4 - - - -
261H TRP 3.2 2.9 + - - -
262H GLY* 2.6 36.1 + - - +
263H ALA 4.3 0.5 + - - -
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Residues in contact with GLY 260 (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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256A VAL 3.1 10.3 + - - -
257A VAL 4.0 8.7 - - - -
258A ILE 3.2 1.6 - - - -
259A THR* 1.3 82.2 - - - +
261A TRP* 1.3 66.7 + - - -
262A GLY 3.2 3.5 + - - -
263A ALA 4.0 0.4 + - - -
264A LEU* 3.2 28.3 + - - +
258H ILE 4.5 0.2 - - - -
260H GLY* 3.6 17.5 - - - -
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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