The Bloom's syndrome gene product is homologous to RecQ helicases

Nathan A. Ellis, Joanna Groden, Tian Zhang Ye, Joel Straughen, David J. Lennon, Susan Ciocci, Maria Proytcheva, James German

Research output: Contribution to journalArticlepeer-review

1242 Scopus citations


The Bloom's syndrome (BS) gene, BLM, plays an important role in the maintenance of genomic stability in somatic cells. A candidate for BLM was identified by direct selection of a cDNA derived from a 250 kb segment of the genome to which BLM had been assigned by somatic crossover point mapping. In this novel mapping method, cells were used from persons with BS that had undergone intragenic recombination within BLM. cDNA analysis of the candidate gene identified a 4437 by cDNA that encodes a 1417 amino acid peptide with homology to the RecQ helicases, a sub-family of DExH box-containing DNA and RNA helicases. The presence of chain-terminating mutations in the candidate gene in persons with BS proved that it was BLM.

Original languageEnglish (US)
Pages (from-to)655-666
Number of pages12
Issue number4
StatePublished - Nov 17 1995

ASJC Scopus subject areas

  • General Biochemistry, Genetics and Molecular Biology


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