Contacts of the helix formed by residues 264 - 272 (chain D) in PDB entry 1L9X
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 264 (chain D).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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262D PHE* 3.2 7.4 - - - +
263D LYS* 1.3 83.8 - - - +
265D GLU* 1.3 60.1 + - - +
266D SER* 3.1 22.3 + - - -
267D GLU* 3.2 17.7 + - - +
268D GLU* 3.0 26.9 + - - +
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Residues in contact with GLU 265 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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264D SER* 1.3 71.8 - - - +
266D SER* 1.3 60.4 + - - +
268D GLU* 3.3 13.2 + - - +
269D GLU* 2.9 31.6 + - - +
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Residues in contact with SER 266 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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264D SER* 3.1 13.4 + - - -
265D GLU* 1.3 80.6 - - - +
267D GLU* 1.3 68.4 + - - +
269D GLU* 3.5 10.8 + - - +
270D LYS* 3.1 25.2 + - - +
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Residues in contact with GLU 267 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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262D PHE* 3.9 13.5 - - + -
263D LYS* 4.1 23.3 - - + +
264D SER* 3.2 20.9 + - - +
266D SER* 1.3 83.0 + - - +
268D GLU* 1.3 67.6 + - - +
270D LYS* 3.4 33.1 + - - +
271D ALA* 3.3 21.5 + - - +
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Residues in contact with GLU 268 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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11D ILE* 3.7 26.5 - - + +
46D ARG* 2.9 33.9 + - - +
261D HIS* 5.7 2.8 - - - +
262D PHE* 3.6 27.4 + - + +
264D SER 3.0 14.5 + - - +
265D GLU* 3.5 15.6 - - - +
266D SER 3.3 0.2 - - - -
267D GLU* 1.3 76.9 - - - +
269D GLU* 1.3 65.4 + - - +
271D ALA* 3.1 13.9 + - - +
272D LEU* 3.3 19.5 + - + +
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Residues in contact with GLU 269 (chain D).
Click here for Legend to table.
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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280C TYR* 2.6 21.9 + - + +
283C ASN* 2.5 42.1 + - - +
265D GLU 2.9 17.5 + - - +
266D SER* 3.8 9.5 - - - +
268D GLU* 1.3 78.3 - - - +
270D LYS* 1.3 61.7 + - - +
271D ALA 3.4 0.5 + - - -
272D LEU* 3.5 19.7 + - + +
275D GLN* 3.3 25.0 + - - +
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Residues in contact with LYS 270 (chain D).
Click here for Legend to table.
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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266D SER 3.1 16.4 + - - +
267D GLU* 3.4 33.9 + - - +
268D GLU 3.2 0.4 - - - -
269D GLU* 1.3 77.7 - - - +
271D ALA* 1.3 60.3 + - - +
275D GLN* 3.7 21.2 - - + +
276D PHE* 4.5 7.3 - - - -
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Residues in contact with ALA 271 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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48D VAL* 3.6 15.9 - - + +
49D PRO* 3.3 21.3 - - - +
62D LEU* 5.5 3.4 - - + -
262D PHE* 3.7 26.0 - - + -
267D GLU 3.3 15.4 + - - +
268D GLU 3.1 6.2 + - - +
270D LYS* 1.3 76.6 - - - +
272D LEU* 1.3 65.2 + - - +
276D PHE* 4.3 2.6 - - - -
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Residues in contact with LEU 272 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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288C GLN* 5.6 1.3 - - - +
11D ILE* 4.0 22.7 - - + -
46D ARG* 4.1 28.5 - - + +
47D VAL 3.4 8.3 - - - +
48D VAL* 3.7 19.7 - - + -
262D PHE* 5.5 0.2 - - + -
268D GLU* 3.3 17.9 - - + +
269D GLU* 3.9 17.0 - - + +
270D LYS 3.4 1.6 - - - -
271D ALA* 1.3 77.9 - - - +
273D ILE* 1.3 63.6 + - + +
274D TYR* 3.0 37.7 - - + +
275D GLN* 3.0 16.1 + - - +
276D PHE* 3.4 12.2 - - - -
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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