Inhibition of CMP-sialic acid transport by endogenous 5-methyl CMP.
Inhibition of CMP-sialic acid transport by endogenous 5-methyl CMP.
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DOI:
10.1371/journal.pone.0249905
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发表时间:
2021
期刊:
影响因子:
3.7
通讯作者:
Whorton MR
中科院分区:
文献类型:
--
作者:
Ahuja S;Cahill J;Hartfield K;Whorton MR
Nucleotide-sugar transporters (NSTs) transport nucleotide-sugar conjugates into the Golgi lumen where they are then used in the synthesis of glycans. We previously reported crystal structures of a mammalian NST, the CMP-sialic acid transporter (CST) (Ahuja and Whorton 2019). These structures elucidated many aspects of substrate recognition, selectivity, and transport; however, one fundamental unaddressed question is how the transport activity of NSTs might be physiologically regulated as a means to produce the vast diversity of observed glycan structures. Here, we describe the discovery that an endogenous methylated form of cytidine monophosphate (m5CMP) binds and inhibits CST. The presence of m5CMP in cells results from the degradation of RNA that has had its cytosine bases post-transcriptionally methylated through epigenetic processes. Therefore, this work not only demonstrates that m5CMP represents a novel physiological regulator of CST, but it also establishes a link between epigenetic control of gene expression and regulation of glycosylation.
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DOI:
10.1107/s090744491003982x
发表时间:
2011-04
期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
--
作者:
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通讯作者:
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影响因子:
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期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
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DOI:
10.1107/s0907444909042073
发表时间:
2010-01
期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
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作者:
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通讯作者:
Richardson DC
DOI:
10.1107/s0907444911001314
发表时间:
2011-04
期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
--
作者:
Murshudov GN;Skubák P;Lebedev AA;Pannu NS;Steiner RA;Nicholls RA;Winn MD;Long F;Vagin AA
通讯作者:
Vagin AA