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Literature summary for 2.3.3.10 extracted from

  • Wang, H.; Nagegowda, D.A.; Rawat, R.; Bouvier-Nave, P.; Guo, D.; Bach, T.J.; Chye, M.L.
    Overexpression of Brassica juncea wild-type and mutant HMG-CoA synthase 1 in Arabidopsis up-regulates genes in sterol biosynthesis and enhances sterol production and stress tolerance (2012), Plant Biotechnol. J., 10, 31-42.
    View publication on PubMed

Cloned(Commentary)

Cloned (Comment) Organism
expressed in Arabidopsis thaliana Brassica juncea

Protein Variants

Protein Variants Comment Organism
H188N the mutant lacks substrate inhibition by acetoacetyl-CoA and shows 8fold decreased enzyme activity Brassica juncea
H188N/S359A the double mutant displays a 10fold increased enzyme activity and lacks inhibition by acetoacetyl-CoA Brassica juncea
S359A the mutant demonstrates 10fold higher activity as the wild type enzyme Brassica juncea

Inhibitors

Inhibitors Comment Organism Structure
acetoacetyl-CoA substrate inhibition Brassica juncea

Localization

Localization Comment Organism GeneOntology No. Textmining
cytosol
-
Brassica juncea 5829
-

Organism

Organism UniProt Comment Textmining
Brassica juncea
-
-
-

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
acetyl-CoA + acetoacetyl-CoA + H2O
-
Brassica juncea (S)-3-hydroxy-3-methylglutaryl-CoA + CoA
-
?

Synonyms

Synonyms Comment Organism
3-hydroxy-3-methylglutaryl-CoA synthase
-
Brassica juncea
HMG-CoA synthase 1
-
Brassica juncea
HMGS
-
Brassica juncea

General Information

General Information Comment Organism
metabolism 3-hydroxy-3-methylglutaryl-CoA synthase is the second enzyme in the cytosolic mevalonate pathway Brassica juncea
physiological function enzyme overexpression up-regulates 3-hydroxy-3-methylglutaryl-CoA reductase, sterol methyltransferase 2, delta-24 sterol reductase, C-22 sterol desaturase, and brassinosteroid-6-oxidase 2, leading to enhanced sterol content and stress tolerance in Arabidopsis. Enzyme overexpressing Arabidopsis seeds germinate approximately 1 day earlier than wild type seeds. Enzyme overexpressing Arabidopsis seedlings show enhanced resistance to Botrytis cinerea, and detached leaves are delayed in H2O2-induced cell death Brassica juncea