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USP15 activates SRSF1. 5 / 5
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"On the other hand, SRSF1 is upregulated by high USP15 and USP4 that enhance cell proliferation and invasion (Fig. 7D)."
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"Depletion of USP15 and USP4 impair SRSF1 splicing characterized by the replacement of exon 4 with non-coding intron sequences retained at its C-terminus, resulting in an alternative isoform SRSF1-3."
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"Deubiquitination enzyme USP15 and its similar parallel gene USP4 were overexpressed and promoted the proliferation of lung cancer cells by regulating SRSF1 alternative splicing (67)."
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"Overexpression of USP15 and USP4 upregulated SRSF1 (Fig. 3A), while the knockdown caused its downregulation (Fig. 3B)."
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"Additionally, the depletion of SRSF1 by USP15 and USP4 knockdown got restored by ectopically overexpressed USP15 or USP4 wild-type, but not by their respective active site mutants (Fig. 3C, D), suggesting that USP15 and USP4 activity is required for SRSF1 regulation."
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