Contacts of the helix formed by residues 182 - 187 (chain o) in PDB entry 4IL6
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 182 (chain o).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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306d ALA* 3.7 27.1 - - + +
307d GLU* 3.9 26.2 - - + +
171o ALA* 4.2 22.7 - - + -
174o LEU* 4.3 16.6 - - + -
177o ALA* 4.8 6.5 - - + -
178o LYS 4.2 14.6 - - - +
179o GLU* 3.2 9.0 + - + +
180o GLU 3.2 1.0 - - - -
181o GLU* 1.3 90.3 - - + +
183o ALA* 1.3 53.3 + - - +
184o ARG 3.2 3.1 - - - -
185o ALA* 3.0 8.1 + - + +
186o ASN* 2.8 49.9 + - - +
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Residues in contact with ALA 183 (chain o).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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179o GLU 3.1 10.8 + - - +
180o GLU* 3.2 17.6 + - - +
181o GLU 3.5 0.2 - - - -
182o LEU* 1.3 77.5 - - - +
184o ARG* 1.3 58.1 + - - +
186o ASN* 4.3 5.8 - - - -
187o VAL* 2.9 42.4 + - + +
9u LEU* 3.9 14.9 - - + +
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Residues in contact with ARG 184 (chain o).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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181o GLU 5.0 3.9 + - - +
182o LEU 3.2 0.8 - - - -
183o ALA* 1.3 79.3 - - - +
185o ALA* 1.3 59.6 + - - +
187o VAL 3.7 12.0 - - - +
188o LYS* 5.5 1.4 + - - +
189o ARG* 3.5 16.3 + - - +
225o MET 5.0 1.4 - - - +
226o GLY 2.7 29.8 + - - +
227o ALA* 3.3 23.6 + - - +
228o HIS* 3.5 23.9 + - - -
229o GLU* 2.7 31.9 + - - +
9u LEU* 3.7 15.8 - - + +
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Residues in contact with ALA 185 (chain o).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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306d ALA 3.3 26.9 - - - +
307d GLU* 4.1 10.3 - - - +
309d PRO* 3.8 22.2 - - + -
162o ARG* 3.7 8.2 - - - +
182o LEU* 3.0 10.0 + - + +
184o ARG* 1.3 77.9 - - - +
186o ASN* 1.3 58.1 + - - +
187o VAL 3.6 0.2 - - - -
188o LYS* 2.6 32.2 + - - +
227o ALA* 5.3 3.1 - - + +
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Residues in contact with ASN 186 (chain o).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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162o ARG* 3.0 36.2 + - - +
163o GLY 5.2 1.9 - - - +
168o TYR 4.9 0.5 - - - +
169o ASP* 3.8 25.6 + - - +
170o SER* 3.8 17.0 - - - +
171o ALA* 3.4 11.3 + - - +
179o GLU* 4.4 19.6 + - - +
182o LEU* 2.8 37.8 + - - +
183o ALA* 3.9 4.9 - - - +
185o ALA* 1.3 78.3 - - - +
187o VAL* 1.3 64.4 + - + +
188o LYS* 3.6 9.1 + - - +
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Residues in contact with VAL 187 (chain o).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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169o ASP 5.5 2.0 - - - +
183o ALA* 2.9 27.2 + - + +
184o ARG* 3.7 13.1 - - - +
186o ASN* 1.3 81.7 - - + +
188o LYS* 1.3 64.5 + - - +
189o ARG* 3.7 12.4 + - + +
225o MET 4.5 0.9 - - - +
9u LEU* 3.8 26.7 - - + +
10u VAL* 3.4 34.5 - - - +
11u ASN* 3.5 11.2 - - + +
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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