Molecular Cloning, Sequence Analysis, and in Vitro Expression of Flavanone 3 Beta-hydroxylase from Petunia Hybrida

Overview

Journal J Biol Chem

Specialty Biochemistry

Date 1992 Mar 15

PMID 1544919

Citations 39

Authors

L Britsch

G Forkmann

Affiliations

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Abstract

A cDNA encoding flavanone 3 beta-hydroxylase was isolated from petals of Petunia hybrida. The open reading frame of the nearly full length cDNA coded for a 369-amino acid polypeptide with a calculated Mr of 41,466. The function of this nucleotide sequence was verified by comparison with amino acid sequence of the amino terminus and tryptic peptides from purified plant enzyme, by Northern blotting with RNA from wild type and mutant plants, and by prokaryotic expression yielding an enzymatically active hydroxylase. Computer-aided sequence analysis revealed high similarity (73.5%) to flavanone 3 beta-hydroxylase from barley. Genomic Southern blot analysis showed the presence of only one gene for flavanone 3 beta-hydroxylase in P. hybrida.

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