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The TATA Box Promoter Region of Maize Adh1 Affects Its Organ-specific Expression

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Journal EMBO J
Date 1992 Jan 1
PMID 1740103
Citations 16
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Abstract

We have isolated two lineage-related Mutator (Mu3) transposon-induced Adh1 promoter mutants in maize: Adh1-3F1124 carries a duplicated TATA box and its revertant, Adh1-3F1124r17, bears a deleted TATA box. Both alterations lead to unique patterns of organ-specific ADH1 enzyme expression. Enzyme activity in Adh1-3F1124 sporophytic organs (scutellum and roots) is greatly reduced, while activity levels remain normal in the male gametophyte (pollen). Conversely, enzyme activity in Adh1-3F1124r17 roots and scutellum is partially restored, but is concomitantly reduced in pollen. Transcript analysis suggests (i) that the TATA box region of the Adh1 gene influences post-transcriptional processes in the male gametophyte but not in roots and (ii) that organ-specific transcription signals in the promoter are distinct from the previously identified anaerobic environment-specific cis-acting transcription signals. Different organs appear to provide surrogate TATA function in different ways, leading to organ-specific differences in the length of the Adh1 message 5' leader.

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