Cloning and sequencing of an apparently recombinant promoter for napin gene from Brassica campestris genomic library and its evolutionary significance

Bhattacharyya, S.; Mandal, R.K.

Indian Journal of Biochemistry and Biophysics 36(4): 221-226

1999


ISSN/ISBN: 0301-1208
PMID: 10650722
Document Number: 498626
From a genomic library of Brassica campestris (brown sarson cv. B54), we have cloned and sequenced about 2 kb of upstream regulatory region from one of the 2S albumin-coding gene family. The sequence has several seed-specific promoter motifs. A sequence alignment of the 5' flanking regions of the available Brassica 2S storage protein genes showed that our sequence is a double crossover recombinant product of the two members of the napin gene family. A possible explanation of this fact is that Brassica species evolved through gene duplication and recombination from a common ancestor with fewer number of chromosomes and genes.

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