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Updated: Aug 14, 2026

Engineering Artificial Factors to Specifically Manipulate Alternative Splicing in Human Cells
Published on: April 26, 2017
A second-step splicing activity is conserved from yeast to human
R M Cicarelli1, A Khaouja, C Codony
1CID-CSIC, c/Jorge Girona Salgado 18-26, Barcelona, 08034, Spain.
Abstract:
We describe a defective HeLa nuclear extract which is particularly deficient in step 2 of splicing reaction. With this extract we have studied the conservation of a second-step activity from yeast to human cells. We detected a S. cerevisiae second-step splicing activity that allows restoration of step 2 of the defective HeLa nuclear extract, which indicates that yeast purified fraction has a second-step activity that is conserved from yeast to human cells. The activity is a yeast UsnRNP protein(s) since it is purified with anti-trimethylguanosine by immunoaffinity columns.
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