CDP-diacylglycerol—inositol 3-phosphatidyltransferase

Transferase enzyme

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CDP-diacylglycerol-inositol 3-phosphatidyltransferase

CDP-diacylglycerol--inositol 3-phosphatidyltransferase homodimer, Mycobacterium tuberculosis

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In enzymology, a CDP-diacylglycerol—inositol 3-phosphatidyltransferase (EC 2.7.8.11) is an enzyme that catalyzes the chemical reaction

CDP-diacylglycerol + myo-inositol

\rightleftharpoons

CMP + phosphatidyl-1D-myo-inositol

Thus, the two substrates of this enzyme are CDP-diacylglycerol and myo-inositol, whereas its two products are CMP and phosphatidyl-1D-myo-inositol.

This enzyme belongs to the family of transferases, specifically those transferring non-standard substituted phosphate groups. The systematic name of this enzyme class is CDP-diacylglycerol:myo-inositol 3-phosphatidyltransferase. Other names in common use include CDP-diglyceride-inositol phosphatidyltransferase, phosphatidylinositol synthase, CDP-diacylglycerol-inositol phosphatidyltransferase, CDP-diglyceride:inositol transferase, cytidine 5'-diphospho-1,2-diacyl-sn-glycerol:myo-inositol, 3-phosphatidyltransferase, CDP-DG:inositol transferase, cytidine diphosphodiglyceride-inositol phosphatidyltransferase, CDP-diacylglycerol:myo-inositol-3-phosphatidyltransferase, CDP-diglyceride-inositol transferase, cytidine diphosphoglyceride-inositol phosphatidyltransferase, and cytidine diphosphoglyceride-inositol transferase. This enzyme participates in glycerophospholipid metabolism and phosphatidylinositol signaling system.

References

Bleasdale JE, Wallis P, MacDonald PC, Johnston JM (1979). "Characterization of the forward and reverse reactions catalyzed by CDP-diacylglycerol:inositol transferase in rabbit lung tissue". Biochim. Biophys. Acta. 575 (1): 135–47. doi:10.1016/0005-2760(79)90139-5. PMID 41587.
Prottey C, Hawthorne JN (1967). "The biosynthesis of phosphatidic acid and phosphatidylinositol in mammalian pancreas". Biochem. J. 105 (1): 379–92. PMC 1198310. PMID 4293959.
Salway JG, Harwood JL, Kai M, White GL, Haworne JN (1968). "Enzymes of phosphoinositide metabolism during rat brain development". J. Neurochem. 15 (3): 221–6. doi:10.1111/j.1471-4159.1968.tb06200.x. PMID 4295616.
Takenawa T, Egawa K (1977). "CDP-diglyceride:inositol transferase from rat liver. Purification and properties". J. Biol. Chem. 252 (15): 5419–23. PMID 18462.

Transferases: phosphorus-containing groups (EC 2.7)

2.7.1-2.7.4:
phosphotransferase/kinase
(PO₄)

2.7.1: OH acceptor	Hexo- Gluco- Fructo- Hepatic Galacto- Phosphofructo- 1 Liver Muscle Platelet 2 Riboflavin Shikimate Thymidine ADP-thymidine NAD Glycerol Pantothenate Mevalonate Pyruvate Deoxycytidine PFP Diacylglycerol Phosphoinositide 3 Class I PI 3 Class II PI 3 Sphingosine Glucose-1,6-bisphosphate synthase
2.7.2: COOH acceptor	Phosphoglycerate Aspartate kinase
2.7.3: N acceptor	Creatine
2.7.4: PO₄ acceptor	Phosphomevalonate Adenylate Nucleoside-diphosphate Uridylate Guanylate Thiamine-diphosphate

2.7.6: diphosphotransferase
(P₂O₇)

2.7.7: nucleotidyltransferase
(PO₄-nucleoside)

Polymerase

DNA polymerase

DNA-directed DNA polymerase

I/A

Taq

II/B

Pfu

III/C

IV/X

TDT

V/Y

RNA-directed DNA polymerase

Reverse transcriptase

Telomerase

RNA polymerase

Template-directed

RNA-dependent RNA polymerase

Polyadenylation

PAP

PNPase

Phosphorolytic
3' to 5' exoribonuclease

Nucleotidyltransferase

Guanylyltransferase

mRNA capping enzyme

Other

2.7.8: miscellaneous

Phosphatidyltransferases	CDP-diacylglycerol—glycerol-3-phosphate 3-phosphatidyltransferase CDP-diacylglycerol—serine O-phosphatidyltransferase CDP-diacylglycerol—inositol 3-phosphatidyltransferase CDP-diacylglycerol—choline O-phosphatidyltransferase
Glycosyl-1-phosphotransferase	N-acetylglucosamine-1-phosphate transferase

2.7.10-2.7.13: protein kinase
(PO₄; protein acceptor)

2.7.10: protein-tyrosine	see tyrosine kinases
2.7.11: protein-serine/threonine	see serine/threonine-specific protein kinases
2.7.12: protein-dual-specificity	see serine/threonine-specific protein kinases
2.7.13: protein-histidine	Protein-histidine pros-kinase Protein-histidine tele-kinase Histidine kinase

v t e Enzymes
Activity	Active site Binding site Catalytic triad Oxyanion hole Enzyme promiscuity Diffusion-limited enzyme Cofactor Enzyme catalysis
Regulation	Allosteric regulation Cooperativity Enzyme inhibitor Enzyme activator
Classification	EC number Enzyme superfamily Enzyme family List of enzymes
Kinetics	Enzyme kinetics Eadie–Hofstee diagram Hanes–Woolf plot Lineweaver–Burk plot Michaelis–Menten kinetics
Types	EC1 Oxidoreductases (list) EC2 Transferases (list) EC3 Hydrolases (list) EC4 Lyases (list) EC5 Isomerases (list) EC6 Ligases (list) EC7 Translocases (list)

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