Contacts of the helix formed by residues 223 - 230 (chain N) in PDB entry 1K2V
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 SER 223 (chain N).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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186N ARG 3.7 12.8 - - - -
187N HIS* 5.4 2.4 - - - -
222N VAL* 1.3 80.9 - - - +
224N ILE* 1.3 65.5 + - - +
225N ASP* 2.6 30.8 + - - -
226N ARG* 3.0 22.0 + - - +
227N LEU 4.0 0.2 + - - -
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Residues in contact with ILE 224 (chain N).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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182N LEU* 4.3 4.0 - - + -
185N PRO 3.4 22.2 - - - +
186N ARG* 4.0 7.7 + - - -
187N HIS 4.3 1.6 - - - +
188N MET* 3.7 36.6 - - + +
223N SER* 1.3 73.0 - - - +
225N ASP* 1.3 63.1 + - - +
227N LEU* 2.9 23.5 + - + +
249N LEU* 3.7 21.3 - - + -
252N THR* 5.6 0.7 - - - +
254N LEU* 3.8 18.6 - - + -
255N TRP* 3.9 15.5 - - + +
258N MET* 3.7 24.6 - - + +
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Residues in contact with ASP 225 (chain N).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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223N SER* 2.6 31.3 + - - -
224N ILE* 1.3 78.8 - - - +
226N ARG* 1.3 70.6 + - - +
228N ALA* 2.9 27.6 + - + +
229N ALA 4.1 1.4 + - - -
254N LEU* 3.8 24.1 - - + +
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Residues in contact with ARG 226 (chain N).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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210N TRP* 5.3 8.3 - - + -
222N VAL* 4.0 19.3 - - + -
223N SER* 3.0 21.8 + - - +
225N ASP* 1.3 85.6 + - - +
227N LEU* 1.3 60.8 + - - +
228N ALA 3.5 0.3 + - - -
229N ALA* 3.5 19.5 + - - +
230N TYR* 3.9 9.0 - - - -
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Residues in contact with LEU 227 (chain N).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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178N LEU* 4.0 23.1 - - + -
180N THR* 4.9 2.5 - - + -
188N MET* 3.5 34.3 - - + -
190N VAL* 4.0 13.2 - - + -
210N TRP* 5.7 1.8 - - + -
222N VAL* 4.0 21.5 - - + -
224N ILE* 2.9 20.9 + - - +
226N ARG* 1.3 75.0 - - - +
228N ALA* 1.3 64.6 + - - +
229N ALA 3.0 2.5 - - - -
230N TYR* 3.1 20.3 + - + -
255N TRP* 3.9 21.3 - - + -
258N MET* 3.6 5.6 - - - -
260N PHE* 3.3 28.8 - - + -
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Residues in contact with ALA 228 (chain N).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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225N ASP* 2.9 17.0 + - + +
227N LEU* 1.3 76.4 - - - +
229N ALA* 1.3 60.4 + - - +
230N TYR 3.0 2.1 + - - -
231N LYS* 5.7 0.3 - - - +
254N LEU* 4.7 9.0 - - + -
258N MET* 3.3 24.8 - - + -
259N PRO* 3.3 25.6 - - + +
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Residues in contact with ALA 229 (chain N).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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225N ASP 4.1 1.6 + - - +
226N ARG* 3.5 16.4 + - - +
227N LEU 3.0 0.4 - - - -
228N ALA* 1.3 77.9 - - - +
230N TYR* 1.3 68.3 + - + +
231N LYS* 3.6 4.6 + - - +
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Residues in contact with TYR 230 (chain N).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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178N LEU* 4.2 14.1 - - + -
209N ALA* 3.2 42.6 + - + -
210N TRP* 3.2 37.6 - + - -
211N GLN 4.8 1.4 + - - -
212N GLY 5.5 0.2 + - - -
226N ARG 3.9 16.6 - - - -
227N LEU* 3.1 19.7 + - + +
228N ALA 3.0 1.6 - - - -
229N ALA* 1.3 85.2 - - + +
231N LYS* 1.3 61.9 + - - +
233N VAL* 3.6 26.0 - - + -
259N PRO* 3.2 17.4 - - - +
260N PHE* 3.3 18.4 - - + -
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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