Contacts of the helix formed by residues 176 - 183 (chain B) in PDB entry 1II7
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 VAL 176 (chain B).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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174B GLN 4.4 1.6 - - - +
175B GLY* 1.3 75.7 - - - +
177B ARG* 1.3 63.6 + - - +
178B GLU* 3.3 24.2 - - - +
179B VAL* 3.0 19.6 + - + +
180B SER* 3.0 21.1 + - - -
188B PHE* 3.8 1.8 - - - -
190B ILE* 3.5 22.7 - - + -
191B GLY 5.2 0.2 - - - -
192B LEU* 3.7 32.1 - - + +
195B LEU* 5.4 3.8 - - + -
204B LEU* 3.8 19.3 - - + -
207B ILE* 4.3 1.8 - - - +
222B TYR* 2.9 20.6 + - - +
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Residues in contact with ARG 177 (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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176B VAL* 1.3 71.4 - - - +
178B GLU* 1.3 71.1 + - - +
180B SER* 3.2 1.0 + - - -
181B GLU* 2.8 70.9 + - - +
188B PHE* 2.9 55.0 - - + +
190B ILE 2.8 18.6 + - - +
191B GLY* 4.0 6.7 - - - -
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Residues in contact with GLU 178 (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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176B VAL* 3.3 6.9 - - - +
177B ARG* 1.3 83.9 - - + +
179B VAL* 1.3 58.6 + - + +
181B GLU* 4.2 7.7 - - - +
182B ALA* 3.1 29.3 + - - +
191B GLY* 3.7 5.0 - - - -
192B LEU* 3.0 56.0 + - + +
193B GLY 4.6 3.1 + - - -
211B TYR* 4.3 2.3 + - - -
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Residues in contact with VAL 179 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
176B VAL* 3.0 21.6 + - + +
178B GLU* 1.3 77.7 - - + +
180B SER* 1.3 64.3 + - - +
182B ALA* 3.6 4.0 + - - +
183B ARG* 3.6 22.1 + - - +
192B LEU* 5.6 2.0 - - + -
207B ILE* 3.5 28.3 - - + -
211B TYR* 3.5 53.8 - - + -
213B THR* 5.2 6.3 - - + -
220B VAL* 5.8 2.2 - - + -
222B TYR* 3.8 20.0 - - + -
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Residues in contact with SER 180 (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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176B VAL 3.0 15.4 + - - -
177B ARG 3.8 2.9 - - - -
179B VAL* 1.3 73.0 - - - +
181B GLU* 1.3 67.8 + - - +
183B ARG* 3.0 9.0 + - - +
185B GLU* 2.9 47.7 + - - +
187B TYR 2.7 34.0 + - - -
188B PHE* 3.8 7.9 - - - +
207B ILE* 4.1 11.8 - - - +
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Residues in contact with GLU 181 (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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177B ARG* 2.8 69.5 + - + +
178B GLU* 4.2 6.1 - - - +
180B SER* 1.3 77.0 - - - +
182B ALA* 1.3 56.4 + - - +
184B GLY* 2.7 25.5 + - - -
185B GLU 3.8 10.5 - - - +
188B PHE* 4.6 7.4 - - + -
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Residues in contact with ALA 182 (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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178B GLU 3.1 20.7 + - - +
179B VAL 3.7 6.1 - - - +
181B GLU* 1.3 76.7 - - - +
183B ARG* 1.3 60.6 + - + +
184B GLY 3.7 0.5 + - - -
211B TYR* 3.7 24.7 - - + +
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Residues in contact with ARG 183 (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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179B VAL* 3.6 11.7 + - - +
180B SER 3.0 7.6 + - - +
181B GLU 2.9 1.0 - - - -
182B ALA* 1.3 82.3 - - + +
184B GLY* 1.3 59.5 + - - +
185B GLU* 3.1 27.7 + - + +
207B ILE* 3.4 20.3 - - - +
209B LYS* 2.8 47.9 + - - +
210B ARG 2.9 24.4 + - - -
211B TYR* 3.7 25.7 - - + +
251B VAL* 4.7 9.7 - - - +
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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