Modulation of 5' splice site choice in pre-messenger RNA by two distinct steps.
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Key result
SR proteins modulate 5' splice site selection in two distinct steps by requiring U1 snRNP integrity for splice site switching and promoting U2 snRNP binding to the branch site.
Population
HeLa cell nuclear extract and standard adenovirus splicing substrate
Comparison
Perturbation of U1 snRNP by detaching the… vs Mock-treated extract or extract treated with…
Design
Preclinical
Authors
Discussion
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Member takes
Implication
Animal study on SR protein splicing steps warrants clinical caution; leaves open validation in human cardiovascular disease models.
Structured PICO
P
Population
HeLa cell nuclear extract and standard adenovirus splicing substrate
I
Intervention
Perturbation of U1 snRNP by detaching the U1-specific A protein using a 2'-O-methyl oligonucleotide (L2) and addition of excess SR proteins
C
Comparator
Mock-treated extract or extract treated with nonspecific oligonucleotide (EBER3)
O
Outcome
5' splice site choice and U2 snRNP binding to the branch site
SR proteins collaborate with the U1 snRNP in two distinct steps to modulate 5' splice site selection in pre-mRNA.
Cite This Study
Tarn et al. (1995) studied this question. 2'-O-methyl oligonucleotide L2 and SR proteins vs. Mock-treated extract was evaluated on 5' splice site choice and spliceosome assembly. SR proteins modulate 5' splice site selection in two distinct steps by requiring U1 snRNP integrity for splice site switching and promoting U2 snRNP binding to the branch site.
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