Quantitative analysis of wobble splicing indicates that it is not tissue specific.

Abstract:

:Alternative splicing is an important mechanism mediating the function of genes in multicellular organisms. Recently, we discovered a new splicing-junction wobble mechanism that generates subtle alterations in mRNA by randomly selecting tandem 5' and 3' splicing-junction sites. Here we developed a sensitive approach to identify such splicing-junction wobble isoforms using polymerase chain reaction amplification with fluorescence-labeled primers encompassing the wobble-splicing boundary and capillary electrophoresis. Using the ING4 wobble isoforms as an example, we demonstrated that capillary electrophoresis can precisely separate DNA fragments with a small difference in size (<3 nt) and can be used to quantify the expression ratio, which thus measures the distribution of each splicing-junction wobble isoform in tissues. Based on our analyses of several genes, the relative ratio of each wobble-splicing isoform tends to be constant among various tissues. The occasional observed tissue heterogeneity of wobble-splicing transcripts can be generated only by genomic single-nucleotide polymorphisms around the splicing junction.

journal_name

Genomics

journal_title

Genomics

authors

Tsai KW,Lin WC

doi

10.1016/j.ygeno.2006.07.004

subject

Has Abstract

pub_date

2006-12-01 00:00:00

pages

855-864

issue

6

eissn

0888-7543

issn

1089-8646

pii

S0888-7543(06)00205-9

journal_volume

88

pub_type

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