The protein product of the fragile X gene, FMR1, has characteristics of an RNA-binding protein

Haruhiko Siomi, Mikiko C. Siomi, Robert L. Nussbaum, Gideon Dreyfuss

Research output: Contribution to journalArticle

522 Citations (Scopus)

Abstract

Fragile X syndrome is one of the most common human genetic diseases and the most common cause of hereditary mental retardation. The gene that causes fragile X syndrome, FMR1, was recently identified and sequenced and found to encode a putative protein of unknown function. Here we report that FMR1 contains two types of sequence motifs recently found in RNA-binding proteins: an RGG box and two heterogeneous nuclear RNP K homology domains. We also demonstrate that FMR1 binds RNA in vitro. Using antibodies to FMR1, we detect its expression in divergent organisms and in cells of unaffected humans, but fragile X-affected patients express little or no FMR1. These findings demonstrate that FMR1 expression is directly correlated with the fragile X syndrome and suggest that anti-FMR1 antibodies will be important for diagnosis of fragile X syndrome. Furthermore, the RNA binding activity of FMR1 opens the way to understanding the function of FMR1.

Original languageEnglish
Pages (from-to)291-298
Number of pages8
JournalCell
Volume74
Issue number2
DOIs
Publication statusPublished - 1993 Jul 30
Externally publishedYes

Fingerprint

Fragile X Syndrome
RNA-Binding Proteins
Genes
RNA
Antibodies
Proteins
Cells
Inborn Genetic Diseases
Medical Genetics
Intellectual Disability
Anti-Idiotypic Antibodies

ASJC Scopus subject areas

  • Cell Biology
  • Molecular Biology

Cite this

The protein product of the fragile X gene, FMR1, has characteristics of an RNA-binding protein. / Siomi, Haruhiko; Siomi, Mikiko C.; Nussbaum, Robert L.; Dreyfuss, Gideon.

In: Cell, Vol. 74, No. 2, 30.07.1993, p. 291-298.

Research output: Contribution to journalArticle

Siomi, Haruhiko ; Siomi, Mikiko C. ; Nussbaum, Robert L. ; Dreyfuss, Gideon. / The protein product of the fragile X gene, FMR1, has characteristics of an RNA-binding protein. In: Cell. 1993 ; Vol. 74, No. 2. pp. 291-298.
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