Maize β-amylase7 encodes 2 proteins using alternative transcriptional start sites: Nuclear BAM7 and plastidic BAM2.

ABSTRACT: An unusual β-amylase7 (BAM7) gene in some angiosperms, including grasses such as maize (Zea mays), appears to encode 2 functionally distinct proteins: a nuclear-localized transcription factor (BAM7) and a plastid-localized starch hydrolase (BAM2). In Arabidopsis (Arabidopsis thaliana), these 2 proteins are encoded by separate genes on different chromosomes but their physiological functions are not well established. Using the maize BAM7 gene as a model, we detected 2 populations of transcripts by 5'-RACE which encode the predicted proteins. The 2 transcripts are apparently synthesized independently using separate core promoters about 1 kb apart, the second of which is located in the first intron of the full-length gene. The N-terminus of the shorter protein, ZmBAM7-S, begins near the 3' end

SUBMITTER: Ozcan KE 

PROVIDER: S-EPMC10400034 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature