Abstract：
:The identity of a given cell type is determined by the expression of a set of genes sharing common cis-regulatory motifs and being regulated by shared transcription factors. Here, we identify cis and trans regulatory elements that drive gene expression in the bilateral sensory neuron ASJ, located in the head of the nematode Caenorhabditis elegans. For this purpose, we have dissected the promoters of the only two genes so far reported to be exclusively expressed in ASJ, trx-1 and ssu-1. We hereby identify the ASJ motif, a functional cis-regulatory bipartite promoter region composed of two individual 6 bp elements separated by a 3 bp linker. The first element is a 6 bp CG-rich sequence that presumably binds the Sp family member zinc-finger transcription factor SPTF-1. Interestingly, within the C. elegans nervous system SPTF-1 is also found to be expressed only in ASJ neurons where it regulates expression of other genes in these neurons and ASJ cell fate. The second element of the bipartite motif is a 6 bp AT-rich sequence that is predicted to potentially bind a transcription factor of the homeobox family. Together, our findings identify a specific promoter signature and SPTF-1 as a transcription factor that functions as a terminal selector gene to regulate gene expression in C. elegans ASJ sensory neurons.
journal_name
Geneticsjournal_title
Geneticsauthors
González-Barrios M,Fierro-González JC,Krpelanova E,Mora-Lorca JA,Pedrajas JR,Peñate X,Chavez S,Swoboda P,Jansen G,Miranda-Vizuete Adoi
10.1534/genetics.115.176172subject
Has Abstractpub_date
2015-05-01 00:00:00pages
123-34issue
1eissn
0016-6731issn
1943-2631pii
genetics.115.176172journal_volume
200pub_type
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