Contacts of the helix formed by residues 231 - 235 (chain B) in PDB entry 1VGO
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 231 (chain B).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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175B THR* 3.5 32.8 + - - +
227B VAL 3.5 8.2 + - - -
228B LEU 2.9 15.2 + - - -
229B LEU 4.5 0.5 - - - +
230B ARG* 1.3 82.2 - - - +
232B ARG* 1.3 62.6 - - - +
233B ALA* 3.2 8.5 + - - +
234B ILE* 3.4 22.7 - - - +
235B LEU* 4.2 3.0 - - - +
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Residues in contact with ARG 232 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
168A ARG* 4.5 0.6 - - - +
169A SER* 3.5 25.9 + - - -
171A GLU* 4.4 2.4 - - - +
172A VAL* 4.2 6.1 - - - +
232A ARG* 2.7 58.5 + - - +
233A ALA* 4.0 5.3 - - - +
235A LEU 3.1 21.2 + - - -
236A GLY* 4.8 2.0 - - - -
400A SO4 3.1 28.5 + - - +
171B GLU* 2.8 42.5 + - + -
231B SER* 1.3 72.4 - - - +
233B ALA* 1.3 53.4 + - - +
234B ILE 3.2 1.6 - - - -
235B LEU* 2.8 39.3 - - + +
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Residues in contact with ALA 233 (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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232A ARG* 3.8 6.3 - - - +
46B TYR* 4.7 1.4 + - - -
105B LEU* 3.9 19.1 - - + +
168B ARG* 4.7 3.8 + - - -
171B GLU* 3.7 5.3 - - - +
172B VAL* 3.6 35.0 - - - +
175B THR* 3.6 31.2 - - + +
231B SER* 3.2 5.6 - - - +
232B ARG* 1.3 79.4 - - - +
234B ILE* 1.3 61.4 + - + +
235B LEU 3.1 6.8 + - - +
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Residues in contact with ILE 234 (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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42B GLU* 3.4 7.2 - - - +
43B ALA* 3.0 43.3 + - + +
46B TYR* 3.2 36.9 - - + -
47B TYR* 4.0 18.6 - - + -
105B LEU* 4.9 0.2 - - + -
228B LEU* 3.4 37.9 - - + +
229B LEU* 3.9 32.3 - - + +
231B SER* 3.4 11.6 + - - +
233B ALA* 1.3 75.4 - - - +
235B LEU* 1.3 69.6 + - + +
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Residues in contact with LEU 235 (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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232A ARG* 3.0 26.9 + - - +
235A LEU* 3.5 38.4 - - + +
236A GLY* 3.6 15.5 - - - +
40B ASP* 3.3 17.5 - - + +
42B GLU* 4.9 1.6 - - - +
43B ALA* 4.5 8.3 - - + -
168B ARG* 5.0 1.6 + - - -
231B SER 4.2 1.8 - - - +
232B ARG* 2.8 50.3 + - + +
233B ALA 3.6 3.5 - - - +
234B ILE* 1.3 90.8 - - + +
236B GLY* 1.3 58.3 + - - +
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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