Contacts of the helix formed by residues 187 - 193 (chain A) in PDB entry 1C3Q
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 HIS 187 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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186A GLY* 1.3 76.4 - - - +
188A LYS* 1.3 74.9 + - + +
189A LEU* 2.9 50.1 + - + +
190A LEU* 3.1 28.6 + - - +
191A THR* 5.5 0.3 - - - +
229A ALA* 4.3 7.6 - - - +
230A GLN* 4.8 1.8 - - - -
233A ALA* 3.3 28.1 - - + +
237A ALA* 4.6 11.9 - - + +
244A PHE* 4.8 5.6 - - + -
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Residues in contact with LYS 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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169A GLY 5.3 0.6 - - - -
170A GLU* 4.3 35.2 - - - +
187A HIS* 1.3 78.4 + - + +
189A LEU* 1.3 57.1 + - - +
190A LEU 3.0 6.1 - - - -
191A THR* 2.6 50.6 + - + +
192A LYS* 4.5 1.7 - - - +
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Residues in contact with LEU 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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187A HIS* 2.9 26.0 + - + +
188A LYS* 1.3 76.4 - - - +
190A LEU* 1.3 56.9 + - - +
191A THR 3.0 0.2 - - - -
192A LYS* 2.9 37.5 + - + +
193A VAL* 3.8 9.0 - - - +
233A ALA* 4.5 1.3 - - + -
236A THR 4.5 1.8 - - - +
237A ALA* 3.8 35.2 - - - +
240A GLY* 4.8 2.5 - - - +
241A PRO* 4.4 26.2 - - + -
244A PHE* 3.6 42.6 - - + -
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Residues in contact with LEU 190 (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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186A GLY* 4.6 4.3 - - - -
187A HIS 3.1 23.5 + - - +
188A LYS 3.0 0.8 - - - -
189A LEU* 1.3 78.1 - - - +
191A THR* 1.3 62.2 + - + +
192A LYS 3.0 1.7 + - - -
193A VAL* 3.4 9.4 + - + +
196A ALA* 3.2 36.5 - - + +
225A TYR* 4.4 20.2 - - + -
226A GLY* 5.7 1.1 - - - -
229A ALA* 3.9 20.2 - - + -
244A PHE* 3.6 26.5 - - + -
248A LEU* 3.7 22.7 - - + -
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Residues in contact with THR 191 (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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187A HIS 5.5 0.2 - - - +
188A LYS* 2.6 42.3 + - + +
190A LEU* 1.3 78.2 - - + +
192A LYS* 1.3 79.1 + - - +
193A VAL 3.5 1.7 + - - -
37B LEU* 3.9 15.6 - - - +
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Residues in contact with LYS 192 (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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188A LYS 4.5 2.9 - - - +
189A LEU* 2.9 22.7 + - + +
191A THR* 1.3 99.2 + - - +
193A VAL* 1.3 60.9 + - - +
241A PRO* 3.8 29.0 - - + +
17B SER* 5.9 0.6 + - - -
34B ASN* 4.2 6.8 - - - +
37B LEU* 3.7 45.7 + - + +
38B ALA* 4.7 1.0 + - - -
40B GLY* 4.9 11.7 + - - -
41B ALA 5.7 0.6 + - - -
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Residues in contact with VAL 193 (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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31A PHE* 4.0 16.6 - - + -
189A LEU 3.8 4.9 - - - +
190A LEU* 3.4 7.8 + - + +
191A THR 3.5 1.3 - - - -
192A LYS* 1.3 83.8 - - + +
194A THR* 1.3 74.4 + - - +
195A GLY 3.5 0.2 + - - -
196A ALA* 3.2 22.7 + - + +
241A PRO* 4.2 14.1 - - + +
244A PHE* 3.7 32.1 - - + -
245A GLN* 3.8 30.3 - - + +
248A LEU* 5.8 1.1 - - + -
34B ASN* 3.6 8.3 - - - +
37B LEU* 3.7 3.2 - - - +
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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