Contacts of the helix formed by residues 320 - 330 (chain B) in PDB entry 2QPA
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 320 (chain B).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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318B VAL* 3.7 9.0 - - + +
319B LEU* 1.3 77.3 - - - +
321B LYS* 1.3 67.0 + - - +
322B GLU* 3.2 13.3 + - - +
323B ASP* 2.6 44.4 + - - +
324B TYR* 3.3 13.1 + - - -
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Residues in contact with LYS 321 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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305B THR* 5.5 0.2 - - - +
309B GLU* 6.1 0.7 - - - -
320B THR* 1.3 73.1 - - - +
322B GLU* 1.3 62.7 + - - +
324B TYR* 3.5 11.3 + - - +
325B ARG* 3.4 19.2 + - - +
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Residues in contact with GLU 322 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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320B THR* 2.9 10.7 - - - +
321B LYS* 1.3 80.6 - - - +
323B ASP* 1.3 58.2 + - - +
325B ARG* 3.2 9.2 + - - +
326B THR* 2.9 30.3 + - - +
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Residues in contact with ASP 323 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
318B VAL 4.1 0.9 - - - +
319B LEU* 3.4 19.7 - - + +
320B THR* 2.6 51.7 + - - +
322B GLU* 1.3 68.9 - - - +
324B TYR* 1.3 65.7 + - - +
326B THR* 3.1 10.8 + - - -
327B LEU* 2.9 27.6 + - + +
403B ILE* 3.7 25.0 - - + +
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Residues in contact with TYR 324 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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305B THR* 3.1 22.2 - - + +
308B PHE* 3.9 22.6 - - + -
309B GLU* 3.5 48.0 + - + +
312B VAL* 3.6 26.4 - - + +
313B GLY 5.2 0.9 + - - -
317B SER* 4.3 2.6 + - - -
319B LEU* 3.4 40.6 - - + +
320B THR 3.3 14.8 + - - -
321B LYS* 4.0 8.5 - - - +
323B ASP* 1.3 76.5 - - - +
325B ARG* 1.3 64.7 + - - +
327B LEU* 3.1 15.5 + - + +
328B GLY 2.8 18.0 + - - -
406B PHE* 5.2 0.2 - + - -
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Residues in contact with ARG 325 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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301B LEU* 4.8 6.7 - - + +
305B THR* 3.4 14.8 + - + +
321B LYS 3.4 9.3 + - - +
322B GLU* 3.2 11.1 + - - +
323B ASP 3.2 0.6 - - - -
324B TYR* 1.3 80.0 - - - +
326B THR* 1.3 57.6 + - - +
328B GLY* 2.8 17.7 + - - -
329B ALA* 3.1 12.1 + - - +
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Residues in contact with THR 326 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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322B GLU* 2.9 19.0 + - - +
323B ASP* 3.1 12.0 + - - -
325B ARG* 1.3 74.8 - - - +
327B LEU* 1.3 64.3 + - - +
329B ALA* 3.3 5.8 + - - +
330B MET* 3.0 39.5 + - + +
407B LEU* 5.6 6.3 - - + -
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Residues in contact with LEU 327 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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308B PHE* 3.7 30.8 - - + -
319B LEU* 5.1 6.7 - - + -
323B ASP* 2.9 19.9 + - + +
324B TYR* 3.3 25.6 - - + +
326B THR* 1.3 76.9 - - - +
328B GLY* 1.3 63.5 + - - +
330B MET* 3.2 9.1 + - - -
331B THR* 3.0 22.0 + - - +
403B ILE* 4.8 6.3 - - + +
406B PHE* 3.7 33.4 - - + -
407B LEU* 4.1 16.2 - - + -
410B ILE* 3.6 25.1 - - + -
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Residues in contact with GLY 328 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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301B LEU* 3.2 7.9 - - - -
304B ARG* 2.7 35.1 + - - -
305B THR* 3.8 18.8 - - - -
308B PHE* 4.5 0.4 - - - -
324B TYR 2.8 10.3 + - - -
325B ARG 2.8 10.9 + - - -
327B LEU* 1.3 76.2 - - - +
329B ALA* 1.3 51.1 + - - -
331B THR* 2.8 18.1 + - - -
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Residues in contact with ALA 329 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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301B LEU* 3.1 25.0 - - + +
304B ARG* 3.6 3.5 + - - +
325B ARG 3.1 8.3 + - - +
326B THR* 4.0 6.7 - - - +
328B GLY* 1.3 71.0 - - - +
330B MET* 1.3 62.4 + - + +
331B THR 3.0 9.4 + - - -
332B GLU* 3.8 11.1 + - - +
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Residues in contact with MET 330 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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326B THR* 3.0 33.5 + - + +
327B LEU* 3.8 5.4 - - - +
328B GLY 3.2 1.0 - - - -
329B ALA* 1.3 78.4 - - - +
331B THR* 1.3 63.9 + - - +
332B GLU 3.8 0.9 - - - -
334B TYR* 5.1 1.0 - - - -
407B LEU* 4.5 20.0 - - + -
410B ILE* 3.6 27.5 - - + +
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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