Contacts of the helix formed by residues 39 - 43 (chain B) in PDB entry 2P3Z
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 HIS 39 (chain B).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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35B GLN* 3.5 34.8 + - + -
36B GLY 4.2 14.8 + - - +
37B GLY 3.1 3.2 + - - +
38B ASN* 1.3 77.5 - - - +
40B TRP* 1.3 91.4 + + - +
41B ILE* 3.1 36.1 + - + +
42B ASP* 3.1 19.7 + - + +
43B ASP* 3.4 11.5 + - - +
352B MET 3.9 2.7 - - - -
353B THR* 2.8 32.0 + - - -
355B PRO* 3.7 24.3 - - + +
361B ARG* 4.7 0.4 - - - -
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Residues in contact with TRP 40 (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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38B ASN 3.9 0.6 + - - -
39B HIS* 1.3 81.6 + - - +
41B ILE* 1.3 75.6 + - + +
43B ASP* 3.1 28.7 + - - +
45B ILE* 3.6 9.8 - - + +
59B ARG* 5.9 0.4 - - - -
173B THR* 3.5 20.6 - - + -
174B GLY* 3.4 22.4 - - - -
175B ALA* 3.8 22.2 - - + -
191B PRO* 3.7 28.0 - - + +
193B HIS* 5.4 1.0 - - - -
351B LEU* 3.8 19.5 - - + -
352B MET 2.8 29.3 + - - -
354B SER 3.2 15.5 + - - -
355B PRO 2.9 20.8 + - - +
356B ASP* 5.2 1.3 - - - -
357B CYS* 3.0 30.4 - - - -
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Residues in contact with ILE 41 (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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32B TYR* 3.8 18.2 - - + +
33B HIS* 3.5 31.8 - - + +
35B GLN* 4.1 15.7 - - + -
39B HIS* 2.9 29.7 + - + +
40B TRP* 1.3 107.0 - - + +
42B ASP* 1.3 60.8 + - + +
45B ILE* 3.4 4.2 - - - +
59B ARG* 2.9 43.2 + - - +
60B GLN* 6.0 0.4 - - - +
351B LEU* 4.4 19.5 - - + -
352B MET 5.1 2.7 - - - +
353B THR* 6.4 0.2 - - - -
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Residues in contact with ASP 42 (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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36B GLY 5.4 0.9 - - - +
38B ASN 6.3 0.2 - - - +
39B HIS* 3.1 14.5 + - + +
40B TRP 3.1 0.4 - - - -
41B ILE* 1.3 80.2 - - + +
43B ASP* 1.3 58.9 + - - +
44B HIS 3.6 0.4 - - - -
45B ILE* 4.3 4.0 + - - -
57B GLN* 3.0 20.8 + - - +
58B SER* 2.7 24.3 + - - -
59B ARG* 2.6 33.8 + - - +
60B GLN* 3.0 37.6 + - - +
64B ILE* 5.0 0.2 - - - +
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Residues in contact with ASP 43 (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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39B HIS 3.4 9.8 + - - +
40B TRP* 3.1 21.2 + - - +
41B ILE 3.6 0.6 - - - -
42B ASP* 1.3 72.5 - - - +
44B HIS* 1.3 70.2 + - - +
45B ILE* 3.3 3.5 - - - +
57B GLN* 3.3 18.7 + - - +
193B HIS* 3.1 25.2 + - + -
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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