Use of the 6-methylsalicylic-acid-synthase gene as a discriminating marker betweenaspergillus terreus andAspergillus flavipes

1999 ◽  
Vol 44 (5) ◽  
pp. 503-509 ◽  
Author(s):  
S. Pažoutová ◽  
I. Hamplová ◽  
M. Anderson ◽  
D. W. Denning
Keyword(s):  
Methylsalicylic Acid Synthase

Tolerance and Specificity of Recombinant 6-Methylsalicylic Acid Synthase

1999 ◽  
Vol 1 (2) ◽  
pp. 180-187 ◽  
Author(s):  
Maia T. Richardson ◽  
Nicola L. Pohl ◽  
James T. Kealey ◽  
Chaitan Khosla
Keyword(s):  
Methylsalicylic Acid Synthase

Structural Similarities between 6-Methylsalicylic Acid Synthase fromPenicillium patulumand Vertebrate Type I Fatty Acid Synthase:  Evidence from Thiol Modification Studies†

Biochemistry ◽  
1996 ◽  
Vol 35 (38) ◽  
pp. 12267-12274 ◽  
Author(s):  
Christopher J. Child ◽  
Jonathan B. Spencer ◽  
Pamela Bhogal ◽  
Peter M. Shoolingin-Jordan
Keyword(s):  
Fatty Acid ◽  
Fatty Acid Synthase ◽  
Type I ◽  
Methylsalicylic Acid Synthase

scholarly journals Purification and properties of 6-methylsalicylic acid synthase from Penicillium patulum

1992 ◽  
Vol 288 (3) ◽  
pp. 839-846 ◽  
Author(s):  
J B Spencer ◽  
P M Jordan
Keyword(s):  
Fatty Acid ◽  
Proteinase Inhibitors ◽  
Type I ◽  
Acetyl Coa ◽  
Purification Method ◽  
Methylsalicylic Acid Synthase ◽  
Acid Lactone ◽  
Penicillium Patulum ◽  
Triacetic Acid Lactone

6-Methylsalicylic acid synthase has been isolated in homogeneous form from Penicillium patulum grown in liquid culture from a spore inoculum. The enzyme is highly susceptible to proteolytic degradation in vivo and in vitro, but may be stabilized during purification by incorporating proteinase inhibitors in the buffers. The enzyme exists as a homotetramer of M(r) 750,000, with a subunit M(r) of 180,000. 6-Methylsalicyclic acid synthase also accepts acetoacetyl-CoA as an alternative starter molecule to acetyl-CoA. The enzyme also catalyses the formation of small amounts of triacetic acid lactone as an oligatory by-product of the reaction. In the absence of NADPH, triacetic acid lactone is the exclusive enzymic product, being formed at 10% of the rate of 6-methylsalicylic acid. The enzyme is inactivated by 1,3-dibromopropan-2-one, leading to the formation of cross-linked dimers similar to that observed with type I fatty acid synthases. Acetyl-CoA protects the enzyme against the inactivation and inhibits dimer formation. An adaptation of the purification method for 6-methylsalicylic acid synthase may be used for the isolation of fatty acid sythase from Penicillium patulum.

scholarly journals Inactivation of the polyketide synthase, 6-methylsalicylic acid synthase, by the specific modification of Cys-204 of the β-ketoacyl synthase by the fungal mycotoxin cerulenin

1998 ◽  
Vol 330 (2) ◽  
pp. 933-937 ◽  
Author(s):  
J. Christopher CHILD ◽  
Peter M. SHOOLINGIN-JORDAN
Keyword(s):  
Fatty Acid ◽  
Polyketide Synthase ◽  
Substrate Binding ◽  
Specific Inhibitor ◽  
Close Similarity ◽  
Type I ◽  
Specific Modification ◽  
Ketoacyl Synthase ◽  
Methylsalicylic Acid Synthase ◽  
Fatty Acid Synthases

Cerulenin, [(2S,3R)-2,3-epoxy-4-oxo-7,10-dodecadienoylamide], a mycotoxin produced by Cephalosporium caerulens, irreversibly inactivated 6-methylsalicylic acid synthase from Penicillium patulum. A combination of radiolabelling studies with [3H]cerulenin, proteolytic and chemical digestion and N-terminal sequencing of labelled peptides indicated that the site of cerulenin modification is the highly reactive substrate-binding Cys-204 of the β-ketoacyl synthase enzyme component. The thiol-specific inhibitor, iodoacetamide, was also shown to alkylate this residue. These findings are analogous with those observed for the reaction of cerulenin and iodoacetamide with type-I fatty acid synthases, demonstrating the close similarity between 6-methylsalicylic acid synthase and type-I fatty acid synthases.

scholarly journals Improving 3-methylphenol (m-cresol) production in yeast via in vivo glycosylation or methylation

2020 ◽  
Vol 20 (8) ◽  
Author(s):  
Julia Hitschler ◽  
Eckhard Boles
Keyword(s):  
Saccharomyces Cerevisiae ◽  
De Novo ◽  
Wild Type ◽  
Biotechnological Production ◽  
Yeast Saccharomyces Cerevisiae ◽  
In Situ Extraction ◽  
Methylsalicylic Acid Synthase ◽  
In The Wild

ABSTRACT Heterologous expression of 6-methylsalicylic acid synthase (MSAS) together with 6-MSA decarboxylase enables de novo production of the platform chemical and antiseptic additive 3-methylphenol (3-MP) in the yeast Saccharomyces cerevisiae. However, toxicity of 3-MP prevents higher production levels. In this study, we evaluated in vivo detoxification strategies to overcome limitations of 3-MP production. An orcinol-O-methyltransferase from Chinese rose hybrids (OOMT2) was expressed in the 3-MP producing yeast strain to convert 3-MP to 3-methylanisole (3-MA). Together with in situ extraction by dodecane of the highly volatile 3-MA this resulted in up to 211 mg/L 3-MA (1.7 mM) accumulation. Expression of a UDP-glycosyltransferase (UGT72B27) from Vitis vinifera led to the synthesis of up to 533 mg/L 3-MP as glucoside (4.9 mM). Conversion of 3-MP to 3-MA and 3-MP glucoside was not complete. Finally, deletion of phosphoglucose isomerase PGI1 together with methylation or glycosylation and feeding a fructose/glucose mixture to redirect carbon fluxes resulted in strongly increased product titers, with up to 897 mg/L 3-MA/3-MP (9 mM) and 873 mg/L 3-MP/3-MP as glucoside (8.1 mM) compared to less than 313 mg/L (2.9 mM) product titers in the wild type controls. The results show that methylation or glycosylation are promising tools to overcome limitations in further enhancing the biotechnological production of 3-MP.

Biosynthesis of polyketides. Purification and inhibition studies of 6-methylsalicylic acid synthase

1974 ◽  
Vol 3 (2) ◽  
pp. 238-248 ◽  
Author(s):  
A.Ian Scott ◽  
L.C. Beadling ◽  
N.H. Georgopapadakou ◽  
C.R. Subbarayan
Keyword(s):  
Methylsalicylic Acid Synthase ◽  
Inhibition Studies
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