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Latosterol oksidaza
Latosterol oksidaza
Identifikatori
EC broj	1.14.21.6
CAS broj	37255-37-1
Baze podataka
IntEnz	IntEnz pregled
BRENDA	BRENDA pristup
ExPASy	NiceZyme pregled
KEGG	KEGG pristup
MetaCyc	metabolički put
PRIAM	profil
Strukture PBP	RCSB PDB PDBe PDBj PDBsum
PMC
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PMC	članci
PubMed	članci
NCBI	proteini

Latosterol oksidaza (EC 1.14.21.6, Delta7-sterol Delta5-dehidrogenaza, Delta7-sterol 5-desaturaza, Delta7-sterol-C5(6)-desaturaza, 5-DES) je enzim sa sistematskim imenom 5alfa-holest-7-en-3beta-ol,NAD(P)H:kiseonik 5-oksidoreduktaza.^[1]^[2]^[3]^[4] Ovaj enzim katalizuje sledeću hemijsku reakciju

5alfa-holest-7-en-3beta-ol + NAD(P)H + H⁺ + O₂

\rightleftharpoons

holesta-5,7-dien-3beta-ol + -{NAD(P)⁺ + 2H₂O

Ovaj enzim katalizuje uvođenje C5 dvostruke veze u B prsten Delta7-sterola čime nastaju korespondirajući Delta5,7-steroli kod sisara, kvasca i biljki.

Reference

^ Dempsey, M.E., Seaton, J.D., Schroepfer, G.J. and Trockman, R.W. (1964). „The intermediary role of Δ^5,7-cholestadien-3β-ol in cholesterol biosynthesis”. J. Biol. Chem. 239: 1381—1387. PMID 14189869.
^ Nishino, H., Nakaya, J., Nishi, S., Kurosawa, T. and Ishibashi, T. (1997). „Temperature-induced differential kinetic properties between an initial burst and the following steady state in membrane-bound enzymes: studies on lathosterol 5-desaturase”. Arch. Biochem. Biophys. 339: 298—304. PMID 9056262.
^ Taton, M. & Rahier, A. (1996). „Plant sterol biosynthesis: identification and characterization of higher plant Δ⁷-sterol C5(6)-desaturase”. Arch. Biochem. Biophys. 325: 279—288. PMID 8561508.
^ Taton, M., Husselstein, T., Benveniste, P. and Rahier, A. (2000). „Role of highly conserved residues in the reaction catalyzed by recombinant Δ⁷-sterol-C5(6)-desaturase studied by site-directed mutagenesis”. Biochemistry. 39: 701—711. PMID 10651635.

Literatura

Nicholas C. Price; Lewis Stevens (1999). Fundamentals of Enzymology: The Cell and Molecular Biology of Catalytic Proteins (Third изд.). USA: Oxford University Press. ISBN 019850229X.
Eric J. Toone (2006). Advances in Enzymology and Related Areas of Molecular Biology, Protein Evolution (Volume 75 изд.). Wiley-Interscience. ISBN 0471205036.
Branden C; Tooze J. Introduction to Protein Structure. New York, NY: Garland Publishing. ISBN 0-8153-2305-0.
Irwin H. Segel. Enzyme Kinetics: Behavior and Analysis of Rapid Equilibrium and Steady-State Enzyme Systems (Book 44 изд.). Wiley Classics Library. ISBN 0471303097.

Spoljašnje veze

Lathosterol+oxidase на US National Library of Medicine Medical Subject Headings (MeSH)

[1] Dempsey, M.E., Seaton, J.D., Schroepfer, G.J. and Trockman, R.W. (1964). „The intermediary role of Δ^5,7-cholestadien-3β-ol in cholesterol biosynthesis”. J. Biol. Chem. 239: 1381—1387. PMID 14189869.

[2] Nishino, H., Nakaya, J., Nishi, S., Kurosawa, T. and Ishibashi, T. (1997). „Temperature-induced differential kinetic properties between an initial burst and the following steady state in membrane-bound enzymes: studies on lathosterol 5-desaturase”. Arch. Biochem. Biophys. 339: 298—304. PMID 9056262.

[3] Taton, M. & Rahier, A. (1996). „Plant sterol biosynthesis: identification and characterization of higher plant Δ⁷-sterol C5(6)-desaturase”. Arch. Biochem. Biophys. 325: 279—288. PMID 8561508.

[4] Taton, M., Husselstein, T., Benveniste, P. and Rahier, A. (2000). „Role of highly conserved residues in the reaction catalyzed by recombinant Δ⁷-sterol-C5(6)-desaturase studied by site-directed mutagenesis”. Biochemistry. 39: 701—711. PMID 10651635.

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