Yin Yang-1 Regulates the Characterized Murine Focal Adhesion-Associated Protein Promoter

Abstract

The focal adhesion-associated protein (FAAP), product of the murine D10Wsu52e gene, is involved in modulating cell adhesion dynamics. The ubiquitously expressed protein belongs to the highly conserved UPF0027 family, the newly identified RNA >p ligase family. To understand the mechanisms underlying FAAP expression and regulation, we first mapped its major transcription start site at the nucleotide 79 bp upstream of the ATG codon. The murine FAAP 2.1 kb 5'-flanking region was cloned, analyzed, and aligned with the corresponding 1.7 kb region of its human homolog HSPC117. Despite the differences in activity, cell in vitro transfection and testis in vivo electroporation identified a 0.2 kb efficient promoter region lacking a functional TATA-box. Gel shift assays confirmed the specific interaction between Yin Yang-1 (YY1) and the potential element in the proximal region of the FAAP promoter. Site mutation, truncation, RNAi, and overexpression analyses suggested that YY1 is an important regulator of the FAAP promoter.

HSPC117 Is Regulated by Epigenetic Modification and Is Involved in the Migration of JEG-3 Cells

“…The human hematopoietic stem/progenitor cell 117 (HSPC117) protein, also known as C22orf28 (with an analogous protein in Bacteria and Archaea, called RtcB), is a member of the UPF0027 family [1,2]. The HSPC117/RtcB protein has been determined to be an essential subunit of a tRNA ligase complex that is involved in tRNA splicing and other RNA repair reactions [3].…”