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The BEL1-like family of transcription factors in potato

Content Provider	PubMed Central
Author	Sharma, Pooja Lin, Tian Carolina, Grandellis Mei, Yu Hannapel, David J.
Copyright Year	2014
Abstract	BEL1-type proteins are ubiquitous plant transcription factors in the three-amino-acid-loop-extension superfamily. They interact with KNOTTED1-like proteins, and function as heterodimers in both floral and vegetative development. Using the yeast two-hybrid system with POTATO HOMEOBOX1 (POTH1) as the bait, seven BEL1-type proteins were originally identified. One of these genes, designated StBEL5, has transcripts that move long distances in the plant and enhance tuberization and root growth. Using the potato genome database, 13 active BEL1-like genes were identified that contain the conserved homeobox domain and the BELL domain, both of which are essential for the function of BEL1-type proteins. Phylogenetic analysis of the StBEL family demonstrated a degree of orthology with the 13 BEL1-like genes of Arabidopsis. A profile of the gene structure of the family revealed conservation of the length and splicing patterns of internal exons that encode key functional domains. Yeast two-hybrid experiments with KNOTTED1-like proteins and the new StBELs confirmed the interactive network between these two families. Analyses of RNA abundance patterns clearly showed that three StBEL genes, BEL5, -11, and -29, make up approximately two-thirds of the total transcript values for the entire family. Among the 10 organs evaluated here, these three genes exhibited the 12 greatest transcript abundance values. Using a phloem-transport induction system and gel-shift assays, transcriptional cross-regulation within the StBEL family was confirmed. Making use of the potato genome and current experimental data, a comprehensive profile of the StBEL family is presented in this study.
Related Links	http://dx.doi.org/10.1093/jxb/ert432
Ending Page	723
Page Count	15
Starting Page	709
File Format	PDF
ISSN	14602431
e-ISSN	14602431
Journal	Journal of Experimental Botany
Issue Number	2
Volume Number	65
Language	English
Publisher	Oxford University Press
Publisher Date	2014-02-01
Access Restriction	Open
Rights Holder	Oxford University Press
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Physiology Plant Science

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