Contacts of the helix formed by residues 258 - 263 (chain G) in PDB entry 1QDU
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 ILE 258 (chain G).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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241G GLY* 3.0 19.4 + - - +
242G ILE* 3.9 8.3 - - - +
243G ILE* 4.3 9.2 - - + +
256G ALA 3.1 3.2 + - - -
257G PRO* 1.3 70.3 - - - +
259G TYR* 1.3 62.7 - - - +
261G LEU* 3.0 21.9 + - + +
262G THR* 3.0 20.0 + - + +
280G PHE* 6.2 0.2 - - + -
282G ILE* 4.2 27.6 - - + -
286G GLN* 3.8 19.3 - - - +
329H LEU* 4.0 24.9 - - + -
331H MET* 3.4 33.4 - - + -
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Residues in contact with TYR 259 (chain G).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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335F ASN* 6.3 2.2 - - + -
336F ASN* 4.9 12.3 + - - -
241G GLY 4.6 1.0 + - - -
257G PRO* 2.9 6.7 + - + +
258G ILE* 1.3 79.5 - - - +
260G GLU* 1.3 74.2 + - + +
262G THR* 3.0 9.4 + - - -
263G SER* 2.9 48.9 + - - -
324H GLU* 4.2 21.8 + - + -
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Residues in contact with GLU 260 (chain G).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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212G TYR* 3.4 24.5 + - + +
257G PRO* 2.6 47.2 + - + +
259G TYR* 1.3 85.2 - - + +
261G LEU* 1.3 59.8 + - - +
263G SER* 3.0 19.0 + - - -
264G GLN* 3.1 21.3 - - - +
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Residues in contact with LEU 261 (chain G).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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211G ILE* 4.6 8.7 - - + -
212G TYR* 3.9 25.1 - - + +
215G LEU* 3.9 24.5 - - + -
234G ILE* 3.6 29.8 - - + -
243G ILE* 3.8 25.6 - - + -
256G ALA* 4.0 13.5 - - + -
257G PRO 3.5 13.9 - - - +
258G ILE* 3.0 14.2 + - + +
260G GLU* 1.3 73.9 - - - +
262G THR* 1.3 68.9 + - + +
264G GLN* 2.8 25.4 + - - +
265G PHE* 3.9 3.6 - - - -
280G PHE* 4.4 9.6 - - + -
282G ILE* 5.8 0.4 - - + -
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Residues in contact with THR 262 (chain G).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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258G ILE* 3.0 21.7 + - + +
259G TYR* 3.0 19.6 + - - -
261G LEU* 1.3 76.9 - - - +
263G SER* 1.3 62.3 + - - +
264G GLN 2.9 6.2 + - - -
265G PHE* 3.0 13.3 + - - -
280G PHE* 3.6 46.4 - - + -
327H PHE* 3.3 28.0 - - + -
329H LEU* 4.7 12.2 - - + +
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Residues in contact with SER 263 (chain G).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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259G TYR* 2.9 40.2 + - - -
260G GLU* 3.0 27.5 + - - -
262G THR* 1.3 75.9 + - - +
264G GLN* 1.3 63.7 + - - +
265G PHE 3.0 1.6 - - - -
266G THR* 3.0 32.0 - - - +
269G LYS* 4.1 9.9 - - - +
327H PHE* 4.9 1.1 - - - -
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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