Contacts of the helix formed by residues 264 - 268 (chain B) in PDB entry 2A8I
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 GLY 264 (chain B).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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116B ASP* 2.7 18.9 + - - -
262B ARG* 4.1 0.8 + - - -
263B VAL* 1.3 76.9 - - - +
265B GLN* 1.3 65.8 + - - -
266B ALA 3.3 2.7 - - - -
267B ALA 3.3 10.7 + - - -
268B LEU* 3.5 15.4 - - - +
294B GLY* 5.6 3.8 - - - -
295B GLU* 5.8 3.1 - - - -
298B VAL* 4.3 6.5 - - - -
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Residues in contact with GLN 265 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
234B THR* 4.8 5.2 + - - +
250B VAL* 4.2 5.1 - - - +
252B SER* 5.0 5.5 - - - -
264B GLY* 1.3 71.4 - - - -
266B ALA* 1.3 77.2 + - + +
267B ALA 3.0 1.7 + - - -
268B LEU* 3.2 8.9 + - - +
271B CYS* 3.6 7.2 + - + +
272B GLY* 3.1 40.7 + - - -
290B THR* 2.7 37.0 + - - +
291B SER* 4.4 3.6 - - - -
292B GLY 5.1 1.7 + - - +
294B GLY* 3.7 28.1 - - - +
297B LEU* 3.6 20.8 - - + +
298B VAL* 3.5 27.6 - - + +
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Residues in contact with ALA 266 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
116B ASP* 3.7 27.8 - - + +
117B ALA 3.3 1.5 - - - -
118B SER* 2.8 34.8 + - - -
250B VAL* 3.5 22.5 - - + +
251B SER 4.3 0.2 - - - -
252B SER* 3.7 22.4 - - - +
264B GLY 3.3 1.0 + - - -
265B GLN* 1.3 87.0 - - - +
267B ALA* 1.3 56.5 + - - +
268B LEU 3.6 0.2 - - - -
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Residues in contact with ALA 267 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
116B ASP* 3.8 6.9 - - + +
117B ALA 4.2 4.0 - - - -
118B SER* 4.6 1.6 - - - -
127B PHE* 4.1 1.0 - - - -
129B ALA* 3.4 21.1 - - - +
130B VAL 3.4 24.7 - - - +
131B GLY* 4.1 0.2 - - - -
164B PHE* 3.9 18.5 - - + -
263B VAL* 3.6 29.4 - - + -
264B GLY 3.3 1.4 + - - -
265B GLN 3.1 1.0 - - - -
266B ALA* 1.3 78.7 - - - +
268B LEU* 1.3 63.3 + - - +
269B TYR 3.8 1.9 + - - -
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Residues in contact with LEU 268 (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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163A CYS* 6.3 0.9 - - - -
164A PHE* 3.7 32.5 - - + -
267A ALA 5.8 0.2 - - - +
268A LEU* 3.6 29.2 - - + -
269A TYR* 5.1 9.2 - - + +
118B SER* 5.2 1.3 + - - -
127B PHE* 4.3 3.3 - - - -
164B PHE* 4.6 2.0 - - + -
263B VAL* 4.5 3.6 - - + +
264B GLY* 3.5 15.0 - - - +
265B GLN 3.2 5.3 + - - +
267B ALA* 1.3 80.9 - - - +
269B TYR* 1.3 67.5 + - - +
270B GLY 3.3 0.3 + - - -
271B CYS* 3.0 26.4 + - - -
272B GLY 3.3 11.1 + - - -
273B CYS 5.1 0.7 + - - +
298B VAL* 3.7 39.9 - - + -
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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
------------------------------------------------------------
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