2019
DOI: 10.1016/j.celrep.2019.04.063
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Guanylate-Binding Proteins 2 and 5 Exert Broad Antiviral Activity by Inhibiting Furin-Mediated Processing of Viral Envelope Proteins

Abstract: Guanylate-binding protein (GBP) 5 is an interferon (IFN)-inducible cellular factor reducing HIV-1 infectivity by an incompletely understood mechanism. Here, we show that this activity is shared by GBP2, but not by other members of the human GBP family. GBP2/5 decrease the activity of the cellular proprotein convertase furin, which mediates conversion of the HIV-1 envelope protein (Env) precursor gp160 into mature gp120 and gp41. Because this process primes HIV-1 Env for membrane fusion, viral particles produce… Show more

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Cited by 135 publications
(176 citation statements)
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“…Zhang et al 33 first found that GBP2 inhibits cell metastasis and mitochondrial fission in breast cancer cells not only in vitro but in vivo and another study found an interesting result that GBP2 related to a recently generally T cell signature, suggesting tumor infiltration with T cells in breast cancer 34 . Other study found GPB2/5 shown wide antiviral activity by suppressing the activation of the virus-dependency factor furin 35 . GBP2 was similarly relocalized in cells in which autophagy was impaired 36 .…”
Section: Discussionmentioning
confidence: 91%
“…Zhang et al 33 first found that GBP2 inhibits cell metastasis and mitochondrial fission in breast cancer cells not only in vitro but in vivo and another study found an interesting result that GBP2 related to a recently generally T cell signature, suggesting tumor infiltration with T cells in breast cancer 34 . Other study found GPB2/5 shown wide antiviral activity by suppressing the activation of the virus-dependency factor furin 35 . GBP2 was similarly relocalized in cells in which autophagy was impaired 36 .…”
Section: Discussionmentioning
confidence: 91%
“…Thus, HIV-1 might be particularly susceptible to further reductions in Env expression due to the degradation of single-spliced or unspliced HIV-1 RNAs. We have previously shown that increased Env expression due to vpu inactivation allows HIV-1 to partly evade restriction by GBP5, which impairs virion infectivity by interfering with furin-mediated Env processing (38)(39)(40). However, data obtained using a chimeric virus that differs only in the env coding region (Fig.…”
Section: Discussionmentioning
confidence: 98%
“…One hypothesis is that acquisition of a PCSK cleavage site would expand the number of cell types that can be directly infected by SARS-CoV-2. A recent report has started to address expression of FURIN in cells expressing SARS-CoV-2 host factors ACE2 or TMPRSS2 47 , and FURIN activity is inhibited by Guanylate-binding proteins (GBPs), a group of interferonstimulated genes, in order to restrict viral envelope processing 160 . However, the highly overlapping recognition sequence of PCSK family members (Extended Data Fig.…”
Section: Discussionmentioning
confidence: 99%