XB-ART-20561Nucleic Acids Res November 11, 1994; 22 (22): 4660-6.
Changes in the stem-loop at the 3'' terminus of histone mRNA affects its nucleocytoplasmic transport and cytoplasmic regulation.
The stem-loop structure at the 3'' end of replication-dependent histone mRNA is required for efficient pre-mRNA processing, localization of histone mRNA to the polyribosomes, and regulation of histone mRNA degradation. A protein, the stem-loop binding protein (SLBP), binds the 3'' end of histone mRNA and is thought to mediate some or all of these processes. A mutant histone mRNA with two nucleotide changes in the loop was constructed and found to be transported inefficiently to the cytoplasm. The mutant histone mRNA, unlike the wild-type histone mRNA, was not rapidly degraded when DNA synthesis is inhibited, and was not stabilized upon inhibition of protein synthesis. The stem-loop binding protein (SLBP) has between a 20-50 fold greater affinity for the wild type histone stem-loop structure than for the mutant stem-loop structure, suggesting that the alteration in the efficiency of transport and the normal degradation pathway in histone mRNA may be due to the reduced affinity of the mutant stem-loop for the SLBP.
PubMed ID: 7984415
PMC ID: PMC308515
Article link: Nucleic Acids Res
Genes referenced: slbp