Contacts of the helix formed by residues 219 - 226 (chain P) in PDB entry 6CNC
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 GLN 219 (chain P).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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218P THR* 1.3 88.3 + - + +
220P GLU* 1.3 56.8 + - - +
221P ILE 2.9 1.9 + - - -
222P LEU* 2.9 49.7 + - - +
223P GLU* 2.7 33.7 + - - +
237P PRO* 4.6 12.2 - - - +
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Residues in contact with GLU 220 (chain P).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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185P PHE* 2.9 44.5 - - + -
217P THR* 3.0 23.5 + - + +
218P THR* 4.6 0.2 - - - +
219P GLN* 1.3 78.1 - - - +
221P ILE* 1.3 67.6 + - - +
223P GLU* 2.9 19.1 + - + +
224P PHE* 2.9 33.1 + - - +
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Residues in contact with ILE 221 (chain P).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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182P VAL* 3.5 28.9 - - + -
185P PHE* 4.5 6.5 - - + -
186P ILE* 4.2 8.1 - - + -
217P THR* 3.4 29.2 - - + -
218P THR* 2.9 21.2 + - - +
220P GLU* 1.3 82.1 + - - +
222P LEU* 1.3 51.7 + - - +
224P PHE* 2.9 8.1 + - + +
225P ILE* 2.6 58.9 + - + +
240P ILE* 3.9 31.4 - - + -
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Residues in contact with LEU 222 (chain P).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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218P THR 5.5 0.2 - - - +
219P GLN* 2.9 37.9 + - - +
221P ILE* 1.3 75.3 - - + +
223P GLU* 1.3 66.4 + - - +
225P ILE* 3.2 17.8 + - + +
226P THR* 3.2 14.4 + - - -
235P LEU* 3.2 26.0 - - + +
236P THR 4.1 0.9 - - - +
237P PRO* 3.5 31.2 - - + -
240P ILE* 3.6 30.1 - - + -
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Residues in contact with GLU 223 (chain P).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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219P GLN* 2.7 39.4 + - - +
220P GLU* 2.9 19.1 + - + +
222P LEU* 1.3 74.4 - - - +
224P PHE* 1.3 61.7 + - - +
226P THR* 3.2 23.4 + - - -
227P ALA 4.5 0.5 + - - -
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Residues in contact with PHE 224 (chain P).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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181P ILE* 4.4 27.1 - - + -
182P VAL* 4.9 6.1 - - - -
185P PHE* 3.7 48.5 - + + -
220P GLU* 2.9 27.1 + - - +
221P ILE* 2.9 13.0 + - + +
223P GLU* 1.3 73.6 - - - +
225P ILE* 1.3 80.1 + - + +
226P THR 3.1 0.4 - - - -
227P ALA* 3.1 30.9 + - + +
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Residues in contact with ILE 225 (chain P).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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178P LEU* 6.0 9.0 - - + -
182P VAL* 5.2 10.3 - - + -
221P ILE* 2.6 43.4 + - + +
222P LEU* 3.2 13.9 + - + +
224P PHE* 1.3 83.8 - - + +
226P THR* 1.3 64.5 + - - +
227P ALA 2.9 1.6 + - - -
228P ALA* 3.1 14.1 + - - +
232P ASN* 5.8 6.5 - - - +
233P VAL 5.9 1.1 - - - +
234P GLU* 5.7 5.4 - - - -
235P LEU* 5.6 13.7 - - + +
240P ILE* 4.5 11.4 - - + -
243P LEU* 6.3 0.9 - - + -
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Residues in contact with THR 226 (chain P).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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222P LEU 3.2 11.8 + - - -
223P GLU* 3.2 22.1 + - - -
224P PHE 3.1 0.4 - - - -
225P ILE* 1.3 75.8 - - - +
227P ALA* 1.3 62.1 + - - +
228P ALA* 3.0 8.7 + - - +
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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