USB1 is a miRNA deadenylase that regulates hematopoietic development.
USB1 is a miRNA deadenylase that regulates hematopoietic development.
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DOI:
10.1126/science.abj8379
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发表时间:
2023-03-03
期刊:
影响因子:
--
通讯作者:
Parker R
中科院分区:
文献类型:
--
作者:
Jeong HC;Shukla S;Fok WC;Huynh TN;Batista LFZ;Parker R
Mutations in the 3’ to 5’ RNA exonuclease USB1 cause hematopoietic failure in Poikiloderma with Neutropenia (PN). While USB1 is known to regulate U6 snRNA maturation, the molecular mechanism of PN remains unknown, as pre-mRNA splicing is unaffected in patients. We generated human embryonic stem cells harboring the PN-associated mutation c.531_delA in USB1 and show that this mutation severely impairs human hematopoietic development. We demonstrate that dysregulated miRNA levels in USB1 mutants contributes to hematopoietic failure, due to a failure to remove 3’ end adenylated tails added by PAPD5/7. Modulation of miRNA 3’ end adenylation through genetic or chemical inhibition of PAPD5/7 rescues hematopoiesis in USB1 mutants. This work shows that USB1 can act as a miRNA deadenylase and suggests PAPD5/7 inhibition as a potential therapy for PN. Disease-associated mutations in USB1 affect miRNAs important for hematopoiesis.
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