期刊
NEURON
卷 25, 期 2, 页码 359-371出版社
CELL PRESS
DOI: 10.1016/S0896-6273(00)80900-9
关键词
-
资金
- NINDS NIH HHS [R01 NS34389] Funding Source: Medline
We have combined genetic and biochemical approaches to analyze the function of the RNA-binding protein Nova-1, the paraneoplastic opsoclonus-myoclonus ataxia (POMA) antigen. Nova-1 null mice die postnatally from a motor deficit associated with apoptotic death of spinal and brainstem neurons. Nova-1 null mice show specific splicing defects in two inhibitory receptor pre-mRNAs, glycine alpha 2 exon 3A (GlyR alpha 2 E3A) and GABA(A) exon gamma 2L. Nova protein in brain extracts specifically bound to a previously identified GlyR alpha 2 intronic (UCAUY)(3) Nova target sequence, and Nova-1 acted directly on this element to increase E3A splicing in cotransfection assays. We conclude that Nova-1 binds RNA in a sequence-specific manner to regulate neuronal pre-mRNA alternative splicing; the defect in splicing in Nova-1 null mice provides a model for understanding the motor dysfunction in POMA.
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