Repositioning of an alternative exon sequence of mouse IgM pre-mRNA activates splicing of the preceding intron
Using a transient expression system of mouse IgM mini-gene constructs in mouse B-cell lines and in fibroblast L cell, we investigated splicing of the IgM transcript. We observed that the efficiency of splicing between exons C4 and Ml (C4-to-Ml splicing), the splicing reaction leading to the production of membrane-bound form (μm) mRNA, was drastically affected by mutations in a specific portion of the downstream exon (M2). The results show that the specific exon M2 sequence activates the C4-to-Ml splicing. This activation was not observed when splicing between exons Ml and M2 was abolished by base substitutions at the splice sites. These results indicate that positioning of the downstream exon is crucial for efficient splicing of the preceding intron.
No Supplementary Data
No Article Media
Document Type: Research Article
Publication date: January 1, 1991
More about this publication?
- Gene Expression, The Journal of Liver Research will publish articles in all aspects of hepatology. Hepatology, as a research discipline, has seen unprecedented growth especially in the cellular and molecular mechanisms of hepatic health and disease, which continues to have a major impact on understanding liver development, stem cells, carcinogenesis, tissue engineering, injury, repair, regeneration, immunology, metabolism, fibrosis, and transplantation. Continued research and improved understanding in these areas will have a meaningful impact on liver disease prevention, diagnosis, and treatment. The existing journal Gene Expression has expanded its focus to become Gene Expression, The Journal of Liver Research to meet this growing demand. In its revised and expanded scope, the journal will publish high-impact original articles, reviews, short but complete articles, and special articles (editorials, commentaries, opinions) on all aspects of hepatology, making it a unique and invaluable resource for readers interested in this field. The expanded team, led by an Editor-in-Chief who is uniquely qualified and a renowned expert, along with a dynamic and functional editorial board, is determined to make this a premier journal in the field of hepatology.