Contacts of the helix formed by residues 217 - 224 (chain B) in PDB entry 1Y2D
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 SER 217 (chain B).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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212B LEU* 2.8 51.0 + - - +
215B THR* 3.2 8.6 - - - -
216B ASN* 1.3 81.4 - - - +
218B GLU* 1.3 64.6 + - - +
219B LEU* 3.7 2.5 + - - -
220B ALA* 3.1 15.4 + - - +
221B LEU* 3.0 22.5 + - - +
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Residues in contact with GLU 218 (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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239A LYS* 3.8 24.1 + - - +
242A GLN* 4.4 10.6 + - - -
216B ASN 3.9 0.5 + - - +
217B SER* 1.3 72.5 - - - +
219B LEU* 1.3 56.8 + - + +
221B LEU* 3.3 20.4 + - - +
222B MET* 2.9 29.9 + - - +
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Residues in contact with LEU 219 (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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203B ASP 5.8 0.2 - - - +
205B PRO* 4.8 9.4 - - + -
212B LEU* 4.1 24.9 - - + -
217B SER* 3.2 7.0 + - - +
218B GLU* 1.3 81.6 - - + +
220B ALA* 1.3 57.4 + - - +
222B MET* 3.3 4.8 + - + -
223B TYR* 3.0 43.4 + - + -
228B VAL* 3.6 14.1 - - + +
229B LEU* 4.6 9.6 - - + -
232B HIS* 3.7 50.7 - - + +
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Residues in contact with ALA 220 (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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261A ARG* 3.2 12.3 + - - +
212B LEU* 3.4 20.9 - - + +
213B ILE* 3.9 9.0 - - + +
216B ASN* 5.1 1.6 - - - -
217B SER* 3.1 22.1 + - - +
219B LEU* 1.3 77.1 - - - +
221B LEU* 1.3 58.0 + - - +
224B ASN 2.9 23.7 + - - -
225B ASP* 3.2 16.7 + - - +
228B VAL* 3.7 13.8 - - + +
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Residues in contact with LEU 221 (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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235A ALA* 3.4 21.2 - - - +
238A PHE* 4.2 19.9 - - + +
239A LYS* 4.2 23.3 - - + -
242A GLN* 3.4 29.4 - - - +
261A ARG* 4.1 24.9 + - - +
216B ASN* 3.8 23.3 - - + +
217B SER 3.0 15.0 + - - +
218B GLU* 3.7 22.2 - - - +
220B ALA* 1.3 76.7 - - + +
222B MET* 1.3 64.8 + - - +
223B TYR 3.5 0.2 + - - -
224B ASN* 3.9 7.1 + - - +
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Residues in contact with MET 222 (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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222A MET* 3.9 43.5 - - + +
223A TYR* 2.8 47.9 + - + +
232A HIS* 6.1 1.3 - - - -
235A ALA* 3.9 5.1 - - - +
239A LYS* 3.6 25.0 - - - +
218B GLU 2.9 13.8 + - - +
219B LEU* 3.3 11.9 + - + +
221B LEU* 1.3 79.1 - - - +
223B TYR* 1.3 73.0 - - + +
224B ASN* 3.8 5.9 + - - -
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Residues in contact with TYR 223 (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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222A MET* 2.7 48.5 + - - -
223A TYR* 3.7 26.2 - + - -
231A ASN* 4.4 5.4 - - - +
219B LEU* 3.0 32.3 + - + +
220B ALA 3.7 0.2 - - - -
222B MET* 1.3 86.2 - - + +
224B ASN* 1.3 71.0 + - - +
225B ASP 3.2 1.8 - - - -
226B SER* 3.2 20.2 + - - +
228B VAL* 3.7 28.9 - - + -
231B ASN* 3.5 30.5 + - + -
232B HIS* 3.9 24.1 + - + -
235B ALA* 3.6 14.2 - - - +
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Residues in contact with ASN 224 (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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231A ASN* 3.0 51.9 + - - +
234A LEU* 3.2 28.3 - - + +
235A ALA 3.8 5.9 + - - -
238A PHE* 4.6 3.5 - - - -
261A ARG* 3.7 8.5 + - - +
265A ILE* 3.6 31.4 - - + +
269A LEU* 5.4 1.8 - - + -
702A EDO 3.8 6.1 - - - -
220B ALA 2.9 8.3 + - - -
221B LEU 3.9 5.9 + - - +
222B MET 3.5 5.7 + - - -
223B TYR* 1.3 77.9 - - - +
225B ASP* 1.3 66.0 + - - +
226B SER* 3.0 13.1 + - - -
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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