Phosphorylation of SAMHD1 by Cyclin A2/CDK1 Regulates Its Restriction Activity toward HIV-1
نویسندگان
چکیده
منابع مشابه
p21 regulates the HIV-1 restriction factor SAMHD1.
Allouch et al. (1) have shown that CDKN1A (p21) restricts HIV-1 replication in monocyte-derived macrophages (MDM) by controlling the expression of the ribonucleotide reductase subunit R2 (RNR2) of the ribonucleotide reductase enzyme that, in turn, controls the intracellular deoxynucleotide (dNTP) pool required for HIV-1 reverse transcription. dNTP levels are also tightly controlled by the dNTP ...
متن کاملRestriction of virus infection but not catalytic dNTPase activity is regulated by phosphorylation of SAMHD1.
SAMHD1 is a host protein responsible, at least in part, for the inefficient infection of dendritic, myeloid, and resting T cells by HIV-1. Interestingly, HIV-2 and SIVsm viruses are able to counteract SAMHD1 by targeting it for proteasomal degradation using their Vpx proteins. It has been proposed that SAMHD1 is a dGTP-dependent deoxynucleoside triphosphohydrolase (dNTPase) that restricts HIV-1...
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The development of deoxynucleoside triphosphate (dNTP)-based drugs requires a quantitative understanding of any inhibition, activation, or hydrolysis by off-target cellular enzymes. SAMHD1 is a regulatory dNTP-triphosphohydrolase that inhibits HIV-1 replication in human myeloid cells. We describe here an enzyme-coupled assay for quantifying the activation, inhibition, and hydrolysis of dNTPs, n...
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SAMHD1 is a restriction factor for HIV-1 infection. SAMHD1 mutations cause the autoinflammatory Aicardi-Goutières syndrome that is characterized by chronic type I interferon (IFN) secretion. We show that the spontaneous IFN response in SAMHD1-deficient cells and mice requires the cGAS/STING cytosolic DNA-sensing pathway. We provide genetic evidence that cell-autonomous control of lentivirus inf...
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The H3K27 histone methyltransferase, Ezh2 (enhancer of zeste 2), is a Polycomb group protein that plays important roles in many biological processes including cellular differentiation, stem cell biology, and cancer development. Up-regulation of Ezh2 is observed in various human cancers consistent with its role in cell proliferation. Thus, understanding the regulation of Ezh2 may reveal how it c...
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ژورنال
عنوان ژورنال: Cell Reports
سال: 2013
ISSN: 2211-1247
DOI: 10.1016/j.celrep.2013.03.017