Title : Arabidopsis cyp51 mutant shows postembryonic seedling lethality associated with lack of membrane integrity.

Pub. Date : 2005 Aug

PMID : 16040657






4 Functional Relationships(s)
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1 CYP51 exists in all organisms that synthesize sterols de novo. Sterols CYTOCHROME P450 51G1 Arabidopsis thaliana
2 Measurements of endogenous sterol levels in the cyp51A2 mutant revealed that it accumulates obtusifoliol, the substrate of CYP51, and a high proportion of 14alpha-methyl-delta8-sterols, at the expense of campesterol and sitosterol. Sterols CYTOCHROME P450 51G1 Arabidopsis thaliana
3 Measurements of endogenous sterol levels in the cyp51A2 mutant revealed that it accumulates obtusifoliol, the substrate of CYP51, and a high proportion of 14alpha-methyl-delta8-sterols, at the expense of campesterol and sitosterol. Sterols CYTOCHROME P450 51G1 Arabidopsis thaliana
4 Taken together, our results demonstrate that the Arabidopsis CYP51A2 gene encodes a functional obtusifoliol 14alpha-demethylase enzyme and plays an essential role in controlling plant growth and development by a sterol-specific pathway. Sterols CYTOCHROME P450 51G1 Arabidopsis thaliana