Contacts of the helix formed by residues 181 - 189 (chain A) in PDB entry 4RQE
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 GLU 181 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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178A ASP* 5.0 4.1 - - - +
180A PHE* 1.3 81.4 - - - +
182A GLY* 1.3 62.9 + - - +
183A GLU* 3.5 8.8 + - - +
184A LYS* 3.8 31.7 + - + +
185A GLY 3.4 13.9 + - - -
195A PHE* 3.6 32.4 + - + +
197A LYS* 4.5 18.1 + - + +
472A LYS* 4.4 14.5 + - - -
279C LEU* 4.9 6.7 - - + -
280C HIS* 6.5 0.7 - - - -
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Residues in contact with GLY 182 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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180A PHE* 3.4 33.6 - - - -
181A GLU* 1.3 71.8 + - - +
183A GLU* 1.3 59.6 + - - +
184A LYS 3.2 2.2 - - - -
185A GLY* 3.2 0.7 + - - -
186A ALA* 2.9 30.8 + - - +
193A GLY 3.7 9.2 - - - +
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Residues in contact with GLU 183 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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181A GLU* 3.5 7.9 + - - +
182A GLY* 1.3 75.6 - - - +
184A LYS* 1.3 70.3 + - + +
186A ALA* 3.8 6.7 + - - +
187A VAL* 3.2 24.6 + - - +
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Residues in contact with LYS 184 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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181A GLU* 3.8 28.3 + - + +
182A GLY 3.2 0.4 - - - -
183A GLU* 1.3 85.5 - - - +
185A GLY* 1.3 61.9 + - - +
186A ALA 3.1 1.6 - - - -
187A VAL* 3.0 26.6 + - + +
188A VAL* 3.0 17.7 + - - +
195A PHE* 4.2 2.0 - - - -
278C ALA 5.6 1.1 - - - +
279C LEU* 3.5 44.9 + - + +
280C HIS* 4.6 4.4 + - - -
281C ARG 5.7 4.5 - - - +
283C GLU* 2.8 31.6 + - - -
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Residues in contact with GLY 185 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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181A GLU 3.4 7.9 + - - -
182A GLY 3.2 3.0 + - - -
184A LYS* 1.3 78.8 - - - +
186A ALA* 1.3 57.9 + - - +
188A VAL* 4.8 0.4 - - - -
189A ALA* 2.9 26.5 + - - +
193A GLY* 3.3 35.5 - - - -
194A TYR 3.8 3.6 - - - -
195A PHE* 3.9 16.7 - - - -
226C PRO* 5.1 0.9 - - - -
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Residues in contact with ALA 186 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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182A GLY 2.9 15.7 + - - +
183A GLU* 3.9 8.3 - - - +
184A LYS 3.1 0.2 - - - -
185A GLY* 1.3 76.5 - - - +
187A VAL* 1.3 63.6 + - + +
190A GLY* 3.2 20.1 - - - -
191A SER* 3.4 25.3 + - - +
192A ARG 5.0 1.6 - - - +
193A GLY 3.7 1.5 + - - +
230C ARG* 4.7 1.7 + - - -
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Residues in contact with VAL 187 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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183A GLU 3.2 18.2 - - - +
184A LYS* 3.0 19.1 + - + +
186A ALA* 1.3 79.4 - - + +
188A VAL* 1.3 61.7 + - + +
230C ARG* 2.9 35.4 + - - +
233C VAL* 4.1 7.1 - - + +
278C ALA 5.2 4.9 - - - +
281C ARG* 4.5 28.5 - - + +
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Residues in contact with VAL 188 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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184A LYS 3.0 14.8 + - - +
185A GLY 4.1 1.3 - - - +
187A VAL* 1.3 79.5 - - + +
189A ALA* 1.3 64.3 + - - +
195A PHE* 4.0 24.5 - - + -
226C PRO* 4.6 11.7 - - + -
228C PHE 3.9 7.2 - - - +
229C MET* 3.4 26.2 - - + +
230C ARG* 2.8 32.1 + - - +
233C VAL* 5.0 5.9 - - + +
275C PRO* 4.7 10.3 - - + +
278C ALA* 4.1 31.4 - - + +
279C LEU* 5.1 0.2 - - - -
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Residues in contact with ALA 189 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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185A GLY 2.9 15.7 + - - +
188A VAL* 1.3 76.6 - - - +
190A GLY* 1.3 61.5 + - - +
191A SER 4.9 1.1 - - - +
193A GLY* 3.6 19.1 - - - +
319A HIS* 6.2 0.7 - - + -
320A GLN* 5.8 0.9 - - - +
226C PRO* 4.2 11.9 - - + -
228C PHE* 3.7 47.8 - - + +
230C ARG* 3.8 7.3 - - - +
266C LYS* 4.1 10.0 + - - +
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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