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Cloning, expression, and chromosome mapping of the murine Hip/Rpl29 gene.

We previously have identified murine heparin/heparan sulfate-interacting protein (HIP) identical to mouse ribosomal protein L29 that is, like its human orthologue, distinctively expressed both on the cell surface and intracellularly in different adult tissues and cell types. In the present study, we show that mouse HIP/RPL29 is encoded by a single mRNA and that it is expressed to different extents in most of the tissues of the developing embryo without restriction to a specific cell type. We isolated the single-copy gene coding for murine Hip/Rpl29 among a large number of pseudogenes, established its structure, and assigned its location to distal chromosome 9. Similar to other ribosomal protein promoters, the promoter of Hip/Rpl29 is rich in polypyrimidine tracts, contains binding motifs for ubiquitously expressed transcription factors, and lacks a TATA box. Progressive 5' deletion analyses identified a strong enhancer region that includes CT-rich sequences and a potential consensus binding site for NF-kappaB. These data will provide valuable tools to progress the understanding of HIP/RPL29 function as a ribosomal protein and/or as a regulator of growth and cell adhesion through interaction with heparan sulfate proteoglycans.