Evolutionary impact of limited splicing fidelity in mammalian genes.
نویسندگان
چکیده
The functional significance of most alternative splicing (AS) events, especially frame-shifting ones, has been controversial. Using human-mouse comparison, we demonstrate that frame-preserving AS events adapt and get fixed more rapidly than frame-shifting AS events; selection for smaller exon size is stronger in frame-preserving exons than in frame-shifting ones. These results suggest AS events introducing mild changes are generally favored during evolution and explain the excess of shorter, frame-preserving cassette exons in present mammalian genomes.
منابع مشابه
Transcriptional mutagenesis reduces splicing fidelity in mammalian cells
Splicing fidelity is essential to the maintenance of cellular functions and viability, and mutations or natural variations in pre-mRNA sequences and consequent alteration of splicing have been implicated in the etiology and progression of numerous diseases. The extent to which transcriptional errors or lesion-induced transcriptional mutagenesis (TM) influences splicing fidelity is not currently...
متن کاملSpliceosomes walk the line: splicing errors and their impact on cellular function.
The splicing of nuclear pre-mRNAs is a fundamental process required for the expression of most metazoan genes. The majority of the approximately 25,000 genes encoded by the human genome has been shown to produce more than one kind of transcripts through alternative splicing. Alternative splicing of pre-mRNAs can lead to the production of multiple protein isoforms from a single gene, significant...
متن کاملDistinct Patterns of Expression and Evolution of Intronless and Intron-Containing Mammalian Genes
Comparison of expression levels and breadth and evolutionary rates of intronless and intron-containing mammalian genes shows that intronless genes are expressed at lower levels, tend to be tissue specific, and evolve significantly faster than spliced genes. By contrast, monomorphic spliced genes that are not subject to detectable alternative splicing and polymorphic alternatively spliced genes ...
متن کاملRole of Aberrant Alternative Splicing in Cancer
Alternative splicing can alter genome sequence and as a consequence, many genes change to oncogenes. This event can also affect protein function and diversity. The growing number of study elucidate the pathological influence of impaired alternative splicing events on numerous disease including cancer. Here, we would like to highlight the significant role of alternative splicing in cancer biolog...
متن کاملRevealing global regulatory features of mammalian alternative splicing using a quantitative microarray platform.
We describe the application of a microarray platform, which combines information from exon body and splice-junction probes, to perform a quantitative analysis of tissue-specific alternative splicing (AS) for thousands of exons in mammalian cells. Through this system, we have analyzed global features of AS in major mouse tissues. The results provide numerous inferences for the functions of tissu...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Trends in genetics : TIG
دوره 23 10 شماره
صفحات -
تاریخ انتشار 2007