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  • Title: The anther-specific protein encoded by the Brassica napus and Arabidopsis thaliana A6 gene displays similarity to beta-1,3-glucanases.
    Author: Hird DL, Worrall D, Hodge R, Smartt S, Paul W, Scott R.
    Journal: Plant J; 1993 Dec; 4(6):1023-33. PubMed ID: 8281185.
    Abstract:
    An anther-specific Brassica napus cDNA, A6, and two corresponding Arabidopsis thaliana genes have been isolated. Sequence analyses of A6 revealed similarity to beta-1,3-glucanases. The deduced A6 protein differs from other beta-1,3-glucanases in the possession of a long C-terminus. Immunoblotting using an antibody raised to the A6 protein detects a temporal 60 kDa protein in B. napus buds, suggesting that the long C-terminal region is present in the mature protein. A6 promoter-GUS and RNase fusions demonstrate that the A6 gene is tapetum-specific and temporally expressed with a peak in activity when the plant normally expresses callase (a complex of endo- and exo-beta-1,3-glucanase activities). The sequence similarity of A6 to other beta-1,3-glucanases, coupled with the temporal and spatial expression data, suggests that A6 may be part of the callase enzyme complex.
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