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EC 1.14.21.6 Details

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EC number

1.14.21.6

Accepted name

lathosterol oxidase

Reaction

5α-cholest-7-en-3β-ol + NAD(P)H + H⁺ + O₂ = cholesta-5,7-dien-3β-ol + NAD(P)⁺ + 2 H₂O

Other name(s)

Δ⁷-sterol Δ⁵-dehydrogenase, Δ⁷-sterol 5-desaturase, Δ⁷-sterol-C5(6)-desaturase, 5-DES

Systematic name

5α-cholest-7-en-3β-ol,NAD(P)H:oxygen 5-oxidoreductase

CAS registry number

37255-37-1

Comment

This enzyme catalyses the introduction of a C₅ double bond into the B ring of Δ⁷-sterols to yield the corresponding Δ^5,7-sterols in mammals, yeast and plants [4]. Forms part of the plant sterol biosynthesis pathway.

History

created 1972 as EC 1.3.3.2, transferred 2005 to EC 1.14.21.6, deleted 2015

EC Tree

1 Oxidoreductases

1.1 Acting on the CH-OH group of donors

1.2 Acting on the aldehyde or oxo group of donors

1.3 Acting on the CH-CH group of donors

1.4 Acting on the CH-NH₂ group of donors

1.5 Acting on the CH-NH group of donors

1.6 Acting on NADH or NADPH

1.7 Acting on other nitrogenous compounds as donors

1.8 Acting on a sulfur group of donors

1.9 Acting on a heme group of donors

1.10 Acting on diphenols and related substances as donors

1.11 Acting on a peroxide as acceptor

1.12 Acting on hydrogen as donor

1.13 Acting on single donors with incorporation of molecular oxygen (oxygenases)

1.14 Acting on paired donors, with incorporation or reduction of molecular oxygen

1.14.1 With NADH or NADPH as one donor (deleted sub-subclass)

1.14.1.1 created 1961 as EC 1.99.1.1, transferred 1965 to EC 1.14.14.1, deleted 1972

1.14.1.2 created 1965, deleted 1972

1.14.1.3 created 1961 as EC 1.99.1.13, transferred 1965 to EC 1.14.1.3, deleted 1972

1.14.1.4 created 1965, deleted 1972

1.14.1.5 created 1965, deleted 1972

1.14.1.6 created 1961 as EC 1.99.1.7, transferred 1965 to EC 1.14.1.6, deleted 1972

1.14.1.7 created 1965, deleted 1972

1.14.1.8 created 1965, deleted 1972

1.14.1.9 created 1965, deleted 1972

1.14.1.10 created 1965, deleted 1972

1.14.1.11 created 1965, deleted 1972

1.14.2 With ascorbate as one donor (deleted sub-subclass)

1.14.3 With reduced pteridine as one donor (deleted sub-subclass)

1.14.11 With 2-oxoglutarate as one donor, and incorporation of one atom of oxygen into each donor

1.14.12 With NADH or NADPH as one donor, and incorporation of two atoms of oxygen into the other donor

1.14.13 With NADH or NADPH as one donor, and incorporation of one atom of oxygen into the other donor

1.14.14 With reduced flavin or flavoprotein as one donor, and incorporation of one atom of oxygen into the other donor

1.14.15 With reduced iron-sulfur protein as one donor, and incorporation of one atom of oxygen into the other donor

1.14.16 With reduced pteridine as one donor, and incorporation of one atom of oxygen into the other donor

1.14.17 With reduced ascorbate as one donor, and incorporation of one atom of oxygen into the other donor

1.14.18 With another compound as one donor, and incorporation of one atom of oxygen into the other donor

1.14.19 With oxidation of a pair of donors resulting in the reduction of O₂ to two molecules of water

1.14.20 With 2-oxoglutarate as one donor, and the other dehydrogenated

1.14.21 With NADH or NADPH as one donor, and the other dehydrogenated

1.14.21.1 (S)-stylopine synthase

1.14.21.2 (S)-cheilanthifoline synthase

1.14.21.3 berbamunine synthase

1.14.21.4 salutaridine synthase

1.14.21.5 (S)-canadine synthase

1.14.21.6 lathosterol oxidase

1.14.21.7 biflaviolin synthase

1.14.21.8 pseudobaptigenin synthase

1.14.21.9 mycocyclosin synthase

1.14.21.10 fumitremorgin C synthase

1.14.21.11 (–)-pluviatolide synthase

1.14.21.12 (S)-nandinine synthase

1.14.99 Miscellaneous

1.15 Acting on superoxide as acceptor

1.16 Oxidizing metal ions

1.17 Acting on CH or CH₂ groups

1.18 Acting on iron-sulfur proteins as donors

1.18.1 With NAD⁺ or NADP⁺ as acceptor

1.18.2 With dinitrogen as acceptor (deleted sub-subclass)

1.18.3 With H⁺ as acceptor (deleted sub-subclass)

1.18.6 With dinitrogen as acceptor

1.18.96 With other, known, acceptors (deleted sub-subclass)

1.18.99 With H⁺ as acceptor (deleted sub-subclass)

1.19 Acting on reduced flavodoxin as donor

1.20 Acting on phosphorus or arsenic in donors

1.21 Catalysing the reaction X-H + Y-H = X-Y

1.21.1 With NAD⁺ or NADP⁺ as acceptor

1.21.3 With oxygen as acceptor

1.21.4 With a disulfide as acceptor

1.21.98 With other, known, physiological acceptors

1.21.99 With unknown physiological acceptors

1.22 Acting on halogen in donors

1.23 Reducing C-O-C group as acceptor

1.97 Other oxidoreductases

1.98 Enzymes using H₂ as reductant (deleted subclass)

1.99 Other enzymes using O₂ as oxidant (deleted subclass)

3.1 Acting on ester bonds

3.2 Glycosylases

3.3 Acting on ether bonds

3.4 Acting on peptide bonds (peptidases)

3.5 Acting on carbon-nitrogen bonds, other than peptide bonds

3.6 Acting on acid anhydrides

3.7 Acting on carbon-carbon bonds

3.8 Acting on halide bonds

3.9 Acting on phosphorus-nitrogen bonds

3.10 Acting on sulfur-nitrogen bonds

3.10.1 Acting on sulfur-nitrogen bonds (only sub-subclass identified to date)

3.11 Acting on carbon-phosphorus bonds

3.12 Acting on sulfur-sulfur bonds

3.13 Acting on carbon-sulfur bonds

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Release 2023.1 (January 2023)