Contacts of the helix formed by residues 204 - 210 (chain B) in PDB entry 1EQB
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 VAL 204 (chain B).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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174B PHE* 3.9 31.0 - - + -
183B TRP* 5.0 4.3 - - + -
201B MET* 3.0 24.2 + - + +
203B HIS* 1.3 79.9 - - - +
205B ALA* 1.3 59.2 + - - +
206B GLY 3.2 3.1 - - - -
207B LEU* 3.1 9.3 + - + -
208B VAL* 2.8 32.5 + - + +
213B TYR* 4.0 44.6 - - + -
230B THR* 3.7 1.1 - - - -
316B ASN* 4.4 4.0 - - + -
317B HIS* 4.2 12.3 - - + +
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Residues in contact with ALA 205 (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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86B PHE* 3.5 12.5 - - + -
201B MET* 2.8 19.5 + - + +
202B ALA 3.9 5.8 - - - +
203B HIS 3.5 0.4 - - - -
204B VAL* 1.3 76.3 - - - +
206B GLY* 1.3 58.3 + - - +
208B VAL 3.4 0.2 + - - -
209B ALA* 2.9 28.9 + - - +
225B THR* 3.0 31.9 - - - +
226B THR 4.4 1.3 - - - +
230B THR* 3.5 1.6 + - - -
231B LEU* 4.1 21.1 - - + -
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Residues in contact with GLY 206 (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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205B ALA* 1.3 74.2 - - - +
207B LEU* 1.3 60.2 + - - +
209B ALA* 3.1 5.6 + - - +
210B ALA 3.1 18.2 + - - -
230B THR* 2.8 40.3 + - - -
231B LEU* 3.8 12.7 - - - +
284B PHE* 3.9 1.5 - - - -
288B GLN* 3.5 16.5 - - - +
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Residues in contact with LEU 207 (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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204B VAL* 3.1 17.4 + - + +
206B GLY* 1.3 74.6 - - - +
208B VAL* 1.3 58.4 + - - +
210B ALA* 3.3 1.4 + - - -
211B GLY 3.0 3.5 + - - -
212B VAL* 2.7 45.0 + - + +
213B TYR* 3.8 17.9 - - + -
230B THR* 3.9 8.7 + - + -
288B GLN* 3.0 45.5 - - + +
291B VAL* 4.6 11.4 - - + -
292B ALA* 5.2 2.7 - - + +
315B ASP 5.1 0.4 - - - +
316B ASN* 3.8 18.6 - - + -
317B HIS* 3.8 29.2 - - - +
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Residues in contact with VAL 208 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
86B PHE* 4.2 13.2 - - + -
201B MET* 4.2 11.7 - - - -
204B VAL* 2.8 27.7 + - + +
205B ALA* 3.7 5.2 - - - +
207B LEU* 1.3 72.5 - - - +
209B ALA* 1.3 67.2 + - - +
211B GLY* 2.8 15.1 + - - -
213B TYR* 3.7 21.0 - - + +
214B PRO 3.7 17.7 - - - +
215B ASN* 3.5 45.2 + - + +
216B PRO* 4.3 3.6 - - + -
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Residues in contact with ALA 209 (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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85B LEU* 4.1 43.8 - - + +
86B PHE* 4.1 9.2 - - + -
205B ALA 2.9 14.7 + - - +
206B GLY 3.1 10.1 + - - +
208B VAL* 1.3 79.2 - - - +
210B ALA* 1.3 60.1 + - - +
211B GLY 3.5 0.2 + - - -
231B LEU* 4.3 3.8 - - + -
279B ALA 5.1 1.5 - - - +
284B PHE* 3.9 16.8 - - + -
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Residues in contact with ALA 210 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
206B GLY 3.1 5.6 + - - +
207B LEU 3.9 3.8 - - - +
209B ALA* 1.3 75.9 - - - +
211B GLY* 1.3 59.9 + - - +
212B VAL* 3.3 8.2 - - + +
284B PHE* 4.2 4.7 - - + +
285B LYS* 3.1 54.9 - - - +
288B GLN* 3.4 37.7 - - + -
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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