A family of human RNA-binding proteins related to the Drosophila Bruno translational regulator

The post-transcriptional regulation of gene expression by RNA-binding proteins is an important element in controlling both normal cell functions and animal development. The diverse roles are demonstrated by the Elav family of RNA-binding proteins, where various members have been shown to regulate se...

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Bibliographic Details
Published in:The Journal of biological chemistry 2000-09, Vol.275 (37), p.28583-28592
Main Authors: Good, P J, Chen, Q, Warner, S J, Herring, D C
Format: Article
Language:English
Subjects:
Amino Acid Sequence
Bruno protein
BRUNOL2 gene
BRUNOL3 gene
Conserved Sequence
Drosophila Proteins
Humans
Molecular Sequence Data
Muscular Dystrophies - etiology
myotonic dystrophy
Response Elements
RNA - metabolism
RNA-Binding Proteins - chemistry
RNA-Binding Proteins - genetics
RNA-Binding Proteins - physiology
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Summary:The post-transcriptional regulation of gene expression by RNA-binding proteins is an important element in controlling both normal cell functions and animal development. The diverse roles are demonstrated by the Elav family of RNA-binding proteins, where various members have been shown to regulate several processes involving mRNA. We have identified another family of RNA-binding proteins distantly related to the Elav family but closely related to Bruno, a translational regulator in Drosophila melanogaster. In humans, six Bruno-like genes have been identified, whereas other species such as Drosophila, Xenopus laevis, and Caenorhabditis elegans have at least two members of this family, and related genes have also been detected in plants and ascidians. The human BRUNOL2 and BRUNOL3 are 92% identical in the RNA-binding domains, although the BRUNOL2 gene is expressed ubiquitously whereas BRUNOL3 is expressed predominantly in the heart, muscle, and nervous system. Both of these proteins bind the same target RNA, the Bruno response element. The RNA-binding domain that recognizes the Bruno response element is composed of two consecutive RNA recognition motifs at the amino terminus of vertebrate Bruno protein. The possible involvement of the Bruno family of proteins in the CUG repeat expansion disease myotonic dystrophy is discussed.
ISSN:0021-9258
DOI:10.1074/jbc.M003083200