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Distribution of Hopanoid Triterpenes in Prokaryotes
Pentacyclic triterpenoids of the hopane family were found in about half of some 100 strains of prokaryotes belonging to diverse taxonomic groups, such a wide distribution indicating the biological…
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Expression in yeast and tobacco of plant cDNAs encoding acyl CoA:diacylglycerol acyltransferase.
TLDR
Light-microscopy observations of leaf epidermis cells, stained with a lipid-specific dye, showed the presence of lipid droplets in the cells of triacylglycerol-overproducer plants, thus illustrating the potential application of acyl CoA:diacyl glycerol acyltransferase-transformed plants.
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Allelic mutant series reveal distinct functions for Arabidopsis cycloartenol synthase 1 in cell viability and plastid biogenesis
TLDR
The observed impact of cas1 mutations on a chloroplastic function implies a previously unrecognized role of sterols or triterpenoid metabolites in plastid biogenesis.
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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.
TLDR
It is suggested that overexpression of HMGS up-regulates HMGR, SMT2, DWF1, CYP710A1 and BR6OX2, leading to enhanced sterol content and stress tolerance in Arabidopsis.
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Mutations in UDP-Glucose:Sterol Glucosyltransferase in Arabidopsis Cause Transparent Testa Phenotype and Suberization Defect in Seeds1[C][W][OA]
TLDR
A membrane function for SGs and acyl SGs in trafficking of lipid polyester precursors and cellulose biosynthesis was observed in the double mutant, inconsistent with a predicted role forSGs in priming cellulose synthesis.
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Two families of sterol methyltransferases are involved in the first and the second methylation steps of plant sterol biosynthesis.
TLDR
Comparisons of two cDNAs isolated from Nicotiana tabacum reveal the coexistence, in a given plant species, of two distinct SMTs, each catalyzing one step of methylation in the sterol biosynthesis pathway.
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UDP-glucose sterol beta-D-glucosyltransferase, a plasma membrane-bound enzyme of plants: enzymatic properties and lipid dependence.
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Identification of cDNAs encoding sterol methyl-transferases involved in the second methylation step of plant sterol biosynthesis.
Two methyl transfers are involved in the course of plant sterol biosynthesis and responsible for the formation of 24-alkyl sterols (mainly 24-ethyl sterols) which play major roles in plant growth and…
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Cellular Sterol Ester Synthesis in Plants Is Performed by an Enzyme (Phospholipid:Sterol Acyltransferase) Different from the Yeast and Mammalian Acyl-CoA:Sterol Acyltransferases*
TLDR
The AtPSAT is the only intracellular enzyme found so far that catalyzes an acyl-CoA-independent sterol ester formation and has a similar physiological function in plant cells as the unrelated acyl -CoA:sterol acyltransferase has in animal cells.
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Overexpression of an Arabidopsis cDNA encoding a sterol-C24(1)-methyltransferase in tobacco modifies the ratio of 24-methyl cholesterol to sitosterol and is associated with growth reduction.
TLDR
It is hypothesize that a radical decrease of 24-methyl cholesterol and/or a concomitant increase of sitosterol would be responsible for a change in cell division through as-yet unknown mechanisms.
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