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. 1983 Dec;3(12):2211–2220. doi: 10.1128/mcb.3.12.2211

U1 small nuclear RNA genes are located on human chromosome 1 and are expressed in mouse-human hybrid cells.

E Lund, C Bostock, M Robertson, S Christie, J L Mitchen, J E Dahlberg
PMCID: PMC370092  PMID: 6197626

Abstract

The majority, and perhaps all, of the genes for human U1 small nuclear RNA (U1 RNA) were shown to be located on the short arm of human chromosome 1. These genes were mapped by Southern blot analysis of DNA from rodent-human somatic cell hybrids, using the 5' region of a human U1 RNA gene as a human-specific probe. This probe hybridized to DNA fragments present only in digests of total human DNA or to the DNAs of cell lines which contained human chromosome 1. The major families of human U1 RNA genes were identified, but some human genes may have gone undetected. Also, the presence of a few U1 RNA genes on human chromosome 19 could not be ruled out. In spite of the lack of extensive 5'-flanking-region homology between the human and mouse U1 RNA genes, the genes of both species were efficiently transcribed in the hybrid cells, and the U1 RNAs of both species were incorporated into specific ribonucleoprotein particles.

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