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PDOC00321
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1995-07-26
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**************************************************
* CDP-alcohol phosphatidyltransferases signature *
**************************************************
A number of phosphatidyltransferases, which are all involved in phospholipid
biosynthesis and that share the property of catalyzing the displacement of CMP
from a CDP-alcohol by a second alcohol with formation of a phosphodiester bond
and concomitant breaking of a phosphoride anhydride bond share a conserved
sequence region [1,2]. These enzymes are:
- Ethanolaminephosphotransferase (EC 2.7.8.1) from yeast (gene EPT1).
- Diacylglycerol cholinephosphotransferase (EC 2.7.8.2) from yeast (gene
CPT1).
- Phosphatidylglycerophosphate synthase (EC 2.7.8.5) (CDP-diacylglycerol--
glycerol-3-phosphate 3-phosphatidyltransferase) from Escherichia coli.
- Phosphatidylserine synthase (EC 2.7.8.8) (CDP-diacylglycerol--serine O-
phosphatidyltransferase) from yeast (gene CHO1).
- Phosphatidylinositol synthase (EC 2.7.8.11) (CDP-diacylglycerol--inositol
3-phosphatidyltransferase) from yeast (gene PIS).
These enzymes are proteins of from 200 to 400 amino acid residues. The
conserved region contains three aspartic acid residues and is located in the
N-terminal section of the sequences.
-Consensus pattern: D-G-x(2)-A-R-x(8)-G-x(3)-D-x(3)-D
-Sequences known to belong to this class detected by the pattern: ALL.
-Other sequence(s) detected in SWISS-PROT: NONE.
-Last update: December 1991 / Pattern and text revised.
[ 1] Nikawa J.-I., Kodaki T., Yamashita S.
J. Biol. Chem. 262:4876-4881(1987).
[ 2] Hjelmstad R.H., Bell R.M.
J. Biol. Chem. 266:5094-5134(1991).