Contacts of the helix formed by residues 257 - 261 (chain B) in PDB entry 2QVH
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 257 (chain B).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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16B PHE* 5.5 0.2 - - + -
75B THR* 3.5 26.0 - - + +
228B SER* 2.7 33.8 + - - +
230B VAL* 3.9 19.4 - - + +
231B GLU 5.4 0.7 - - - -
236B LEU* 3.6 10.4 - - - +
254B GLY 4.1 3.1 - - - +
255B LEU 3.2 2.5 - - - -
256B ALA* 1.3 75.8 - - - +
258B LEU* 1.3 65.6 + - - +
259B ARG 3.0 2.9 - - - -
260B LEU* 2.9 37.3 + - + +
261B LEU* 4.1 2.1 + - - +
5551B OSB 3.5 16.4 - - + -
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Residues in contact with LEU 258 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
231B GLU 3.9 13.2 - - - +
232B THR 4.0 0.4 - - - -
233B SER* 3.3 33.0 - - - +
236B LEU* 3.7 14.2 - - + +
255B LEU 4.7 0.2 + - - -
256B ALA* 3.6 1.6 - - - +
257B THR* 1.3 79.6 + - - +
259B ARG* 1.3 57.4 + - - +
261B LEU* 3.0 40.9 + - + +
263B ALA 5.1 0.7 - - - +
264B ASP* 3.7 25.8 - - + +
269B PRO* 3.5 17.0 - - + -
270B LEU* 3.5 30.1 - - + +
271B LEU* 3.9 13.0 - - + -
272B PRO* 6.1 0.9 - - + +
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Residues in contact with ARG 259 (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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13B ARG* 2.9 40.4 + - - +
14B THR* 5.8 1.8 - - - +
74B ALA* 6.6 0.2 - - - +
75B THR* 4.7 6.9 + - - +
87B ILE* 4.1 47.9 + - - +
90B SER* 5.4 3.8 + - - -
91B SER* 6.2 5.1 - - - +
256B ALA* 3.8 21.0 - - - +
257B THR 3.0 1.6 - - - -
258B LEU* 1.3 78.1 - - - +
260B LEU* 1.3 79.7 + - + +
261B LEU 3.1 1.8 - - - -
271B LEU* 4.3 13.8 - - + +
272B PRO* 6.4 1.3 - - + -
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Residues in contact with LEU 260 (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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12B LEU* 3.2 15.6 - - + +
13B ARG* 2.8 28.0 + - - +
14B THR* 4.1 14.8 + - + -
16B PHE* 3.8 39.3 - - + -
75B THR* 4.4 9.0 - - + +
77B PRO* 3.8 26.0 - - + -
230B VAL* 4.6 11.2 - - + -
257B THR* 2.9 34.5 + - + +
259B ARG* 1.3 98.1 - - + +
261B LEU* 1.3 59.3 + - - +
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Residues in contact with LEU 261 (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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10B ILE* 4.2 11.0 - - + +
11B PRO 3.9 1.1 - - - -
12B LEU* 3.9 16.6 - - + -
13B ARG* 3.1 21.4 + - - -
22B ARG* 3.8 27.8 - - + -
230B VAL* 4.3 13.0 - - + +
231B GLU 3.7 24.5 - - - +
232B THR* 4.1 15.5 - - + -
257B THR 4.6 5.4 - - - +
258B LEU* 3.0 31.7 + - + +
260B LEU* 1.3 80.9 - - - +
262B HIS* 1.3 63.8 + - - +
263B ALA* 3.2 19.1 + - - +
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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