Human Lymphocyte-Specific pp52 Gene Is a Member of a Highly Conserved Dispersed Family

William May, Julie R. Korenberg, Xiao Ning Chen, Lynn Lunsford, William J. Wood, Alexic Thompson, Randolph Wall, Christopher T. Denny*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


For a better understanding of genes that potentially function in B lymphocyte cell signaling, we isolated the human genomic counterpart of the murine pp52 or LSP1 gene. We unexpectedly found that the human pp52 gene is one of four closely related loci. Representative cosmids from each of the four family members were isolated and chromosomally localized by fluorescence in situ hybridization. Nucleotide sequence was obtained from an exon common to each locus and demonstrated very close similarity among all four loci. Two of the four loci harbored dysfunctional frameshift mutations or premature translation stop sites. The exon of one locus was flanked by an 80-bp perfect inverted repeat, suggesting that it may have originated through a looped intermediate DNA structure. Through a series of cDNA hybridization studies and nucleotide sequence analyses we were able to unambiguously link the lymphocyte-expressed gene to the locus mapped to chromosome 11p15.5. This same chromosomal band has been involved in tumor-related chromosomal translocations found in chronic lymphocytic leukemia.

Original languageEnglish (US)
Pages (from-to)515-520
Number of pages6
Issue number3
StatePublished - Mar 1993

ASJC Scopus subject areas

  • Genetics

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