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Structure and alternative splicing of a heat shock transcription factor gene, MsHSF1, in Medicago sativa.

Abstract：

:Plant heat shock transcription factors (HSF) are highly complex. In this study, we identified an alfalfa HSF gene MsHSF1 that is composed of four exons and three introns in the encoding region. The intron1-exon2-intron2-exon3-intron3 as an intervening sequence was inserted at the conserved position that separates the coding region for the DNA-binding domain by single intron in other known plant HSF genes. Alternative splicing of MsHSF1 has generated five transcript isoforms. Spliced transcript MsHSF1b consisted of exon1 and exon4, encodes a class A1 HSF protein that can specifically bind to the heat shock elements in vitro. Other four spliced transcripts (MsHSF1a-1 to 4) consist of exon1, part of the intervening sequence and exon4. These transcripts carry the premature termination codon and are low-abundant. Apparently these transcripts are the targets of nonsense-mediated mRNA decay (NMD). These results provide new insight into roles in the expression regulation of plant HSF genes.

journal_name

Biochem Biophys Res Commun

journal_title

Biochemical and biophysical research communications

authors

He ZS,Xie R,Zou HS,Wang YZ,Zhu JB,Yu GQ

doi

10.1016/j.bbrc.2007.10.131

subject

Has Abstract

pub_date

2007-12-28 00:00:00

pages

1056-61

issue

4

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(07)02312-1

journal_volume

364

pub_type

杂志文章

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