Contacts of the helix formed by residues 166 - 173 (chain B) in PDB entry 2GRA
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 LEU 166 (chain B).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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162B VAL* 3.3 42.2 - - + +
163B GLU* 3.4 14.1 - - + +
164B GLU 2.6 5.5 + - - -
165B ASP* 1.3 99.4 + - - +
167B ILE* 1.3 53.1 + - - +
168B ASP 3.0 2.9 - - - -
169B ALA* 2.5 43.7 + - + +
170B VAL* 3.0 14.3 + - + -
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Residues in contact with ILE 167 (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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119B ARG* 3.6 44.2 - - + +
120B CYS* 4.6 7.9 - - - +
121B MET* 3.7 28.5 - - + +
134B VAL* 5.6 9.9 - - + +
135B TYR 5.5 1.1 - - - -
136B ALA* 4.2 11.2 - - + +
162B VAL 5.4 2.0 - - - +
163B GLU 4.9 0.4 - - - +
164B GLU* 2.5 51.1 + - + +
166B LEU* 1.3 70.8 - - - +
168B ASP* 1.3 59.2 + - - +
170B VAL* 3.7 9.5 - - - +
171B THR* 2.7 38.1 + - - +
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Residues in contact with ASP 168 (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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98B GLY* 5.4 0.2 - - - -
119B ARG* 4.4 10.3 + - - -
164B GLU 4.9 0.6 - - - +
165B ASP* 3.4 22.0 - - - +
166B LEU 2.8 2.2 + - - -
167B ILE* 1.3 75.7 - - - +
169B ALA* 1.3 66.3 + - - +
171B THR* 3.4 3.5 - - - -
172B GLY 3.1 14.2 + - - -
262B CYS* 3.8 18.1 - - - -
265B THR* 3.3 28.0 + - + +
266B ARG* 4.0 28.5 + - + +
269B GLN* 3.2 25.2 - - - +
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Residues in contact with ALA 169 (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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165B ASP 4.7 0.4 + - - +
166B LEU* 2.5 24.8 + - + +
168B ASP* 1.3 70.9 - - - +
170B VAL* 1.3 59.9 + - + +
172B GLY* 2.6 26.7 + - - -
173B LEU* 2.8 12.7 + - - +
258B VAL* 4.9 2.5 - - - +
262B CYS* 4.0 15.5 - - - +
266B ARG* 5.7 2.5 - - - +
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Residues in contact with VAL 170 (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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121B MET* 4.0 12.6 - - + -
132B ALA 5.9 0.4 - - - +
133B THR* 5.9 0.4 - - - -
134B VAL* 4.3 30.1 - - + +
166B LEU* 3.0 20.5 + - + +
167B ILE* 3.7 10.3 - - - +
169B ALA* 1.3 80.0 - - + +
171B THR* 1.3 58.4 + - - +
173B LEU* 3.0 10.3 - - + -
174B SER* 2.6 62.3 + - - +
175B GLY 2.8 3.8 + - - -
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Residues in contact with THR 171 (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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119B ARG* 5.3 0.3 + - - -
121B MET* 2.9 35.5 - - + +
167B ILE* 2.7 34.5 + - - +
168B ASP* 3.4 7.5 - - - -
169B ALA 2.8 1.8 + - - -
170B VAL* 1.3 68.2 - - - +
172B GLY* 1.3 68.4 + - - +
175B GLY* 2.8 14.1 + - - +
176B SER* 2.6 27.8 + - - +
261B SER* 4.3 2.9 - - - +
265B THR* 3.7 22.8 - - + +
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Residues in contact with GLY 172 (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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168B ASP 3.1 3.6 + - - -
169B ALA 2.6 13.3 + - - -
171B THR* 1.3 76.2 - - - +
173B LEU* 1.3 61.1 + - - +
176B SER* 3.3 2.1 - - - -
180B TYR* 2.8 26.4 + - - -
258B VAL* 3.7 11.2 - - - +
261B SER* 3.0 25.8 - - - -
262B CYS* 3.6 11.6 - - - +
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Residues in contact with LEU 173 (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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169B ALA 2.8 10.8 + - - +
170B VAL* 3.5 10.3 - - + +
171B THR 3.0 0.4 - - - -
172B GLY* 1.3 74.3 - - - +
174B SER* 1.3 70.2 + - - +
175B GLY 3.0 0.8 + - - -
177B GLY* 2.6 36.8 + - - -
180B TYR* 5.3 4.7 - - + -
258B VAL* 3.7 20.9 - - + +
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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