| Structural highlights
Function
POLG_YEFV1 Capsid protein C self-assembles to form an icosahedral capsid about 30 nm in diameter. The capsid encapsulates the genomic RNA (By similarity).[1] [2] [3] [4] [5] prM acts as a chaperone for envelope protein E during intracellular virion assembly by masking and inactivating envelope protein E fusion peptide. prM is matured in the last step of virion assembly, presumably to avoid catastrophic activation of the viral fusion peptide induced by the acidic pH of the trans-Golgi network. After cleavage by host furin, the pr peptide is released in the extracellular medium and small envelope protein M and envelope protein E homodimers are dissociated (By similarity).[6] [7] [8] [9] [10] Envelope protein E binding to host cell surface receptor is followed by virus internalization through clathrin-mediated endocytosis. Envelope protein E is subsequently involved in membrane fusion between virion and host late endosomes. Synthesized as a homodimer with prM which acts as a chaperone for envelope protein E. After cleavage of prM, envelope protein E dissociate from small envelope protein M and homodimerizes (By similarity).[11] [12] [13] [14] [15] Non-structural protein 1 is involved in virus replication and regulation of the innate immune response (By similarity).[16] [17] [18] [19] [20] Non-structural protein 2A may be involved viral RNA replication and capsid assembly (Potential).[21] [22] [23] [24] [25] Non-structural protein 2B is a required cofactor for the serine protease function of NS3 (By similarity).[26] [27] [28] [29] [30] Serine protease NS3 displays three enzymatic activities: serine protease, NTPase and RNA helicase. NS3 serine protease, in association with NS2B, performs its autocleavage and cleaves the polyprotein at dibasic sites in the cytoplasm: C-prM, NS2A-NS2B, NS2B-NS3, NS3-NS4A, NS4A-2K and NS4B-NS5. NS3 RNA helicase binds RNA and unwinds dsRNA in the 3' to 5' direction (By similarity).[31] [32] [33] [34] [35] Non-structural protein 4A induces host endoplasmic reticulum membrane rearrangements leading to the formation of virus-induced membranous vesicles hosting the dsRNA and polymerase, functioning as a replication complex. NS4A might also regulate the ATPase activity of the NS3 helicase (By similarity).[36] [37] [38] [39] [40] Peptide 2k functions as a signal peptide for NS4B and is required for the interferon antagonism activity of the latter (By similarity).[41] [42] [43] [44] [45] Non-structural protein 4B inhibits interferon (IFN)-induced host STAT1 phosphorylation and nuclear translocation, thereby preventing the establishment of cellular antiviral state by blocking the IFN-alpha/beta pathway (By similarity).[46] [47] [48] [49] [50] RNA-directed RNA polymerase NS5 replicates the viral (+) and (-) genome, and performs the capping of genomes in the cytoplasm. NS5 methylates viral RNA cap at guanine N-7 and ribose 2'-O positions. Besides its role in genome replication, also prevents the establishment of cellular antiviral state by blocking the interferon-alpha/beta (IFN-alpha/beta) signaling pathway (By similarity).[51] [52] [53] [54] [55]
Publication Abstract from PubMed
Yellow fever virus (YFV) infections can cause severe diseases in humans, resulting in mass casualties in Africa and the Americas each year. Secretory NS1 (sNS1) is thought to be used as a diagnostic marker of flavivirus infections, playing an essential role in the flavivirus life cycle, but little is known about the composition and structure of YFV sNS1. Here, we present that the recombinant YFV sNS1 exists in a heterogeneous mixture of oligomerizations, predominantly in the tetrameric form. The cryoEM structures show that the YFV tetramer of sNS1 is stacked by the hydrophobic interaction between beta-roll domains and greasy fingers. According to the 3D variability analysis, the tetramer is in a semi-stable state that may contain multiple conformations with dynamic changes. We believe that our study provides critical insights into the oligomerization of NS1 and will aid the development of NS1-based diagnoses and therapies.
Structural Insights into the Dynamic Assembly of a YFV sNS1 Tetramer.,Pan Q, Chen Q, Zhang W, Jiao H, Yu L, Hu H Viruses. 2024 Jul 29;16(8):1212. doi: 10.3390/v16081212. PMID:39205186[56]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Amberg SM, Nestorowicz A, McCourt DW, Rice CM. NS2B-3 proteinase-mediated processing in the yellow fever virus structural region: in vitro and in vivo studies. J Virol. 1994 Jun;68(6):3794-802. PMID:8189517
- ↑ Lindenbach BD, Rice CM. trans-Complementation of yellow fever virus NS1 reveals a role in early RNA replication. J Virol. 1997 Dec;71(12):9608-17. PMID:9371625
- ↑ Munoz-Jordan JL, Laurent-Rolle M, Ashour J, Martinez-Sobrido L, Ashok M, Lipkin WI, Garcia-Sastre A. Inhibition of alpha/beta interferon signaling by the NS4B protein of flaviviruses. J Virol. 2005 Jul;79(13):8004-13. PMID:15956546 doi:10.1128/JVI.79.13.8004-8013.2005
- ↑ Zhou Y, Ray D, Zhao Y, Dong H, Ren S, Li Z, Guo Y, Bernard KA, Shi PY, Li H. Structure and function of flavivirus NS5 methyltransferase. J Virol. 2007 Apr;81(8):3891-903. Epub 2007 Jan 31. PMID:17267492 doi:10.1128/JVI.02704-06
- ↑ Issur M, Geiss BJ, Bougie I, Picard-Jean F, Despins S, Mayette J, Hobdey SE, Bisaillon M. The flavivirus NS5 protein is a true RNA guanylyltransferase that catalyzes a two-step reaction to form the RNA cap structure. RNA. 2009 Dec;15(12):2340-50. doi: 10.1261/rna.1609709. Epub 2009 Oct 22. PMID:19850911 doi:10.1261/rna.1609709
- ↑ Amberg SM, Nestorowicz A, McCourt DW, Rice CM. NS2B-3 proteinase-mediated processing in the yellow fever virus structural region: in vitro and in vivo studies. J Virol. 1994 Jun;68(6):3794-802. PMID:8189517
- ↑ Lindenbach BD, Rice CM. trans-Complementation of yellow fever virus NS1 reveals a role in early RNA replication. J Virol. 1997 Dec;71(12):9608-17. PMID:9371625
- ↑ Munoz-Jordan JL, Laurent-Rolle M, Ashour J, Martinez-Sobrido L, Ashok M, Lipkin WI, Garcia-Sastre A. Inhibition of alpha/beta interferon signaling by the NS4B protein of flaviviruses. J Virol. 2005 Jul;79(13):8004-13. PMID:15956546 doi:10.1128/JVI.79.13.8004-8013.2005
- ↑ Zhou Y, Ray D, Zhao Y, Dong H, Ren S, Li Z, Guo Y, Bernard KA, Shi PY, Li H. Structure and function of flavivirus NS5 methyltransferase. J Virol. 2007 Apr;81(8):3891-903. Epub 2007 Jan 31. PMID:17267492 doi:10.1128/JVI.02704-06
- ↑ Issur M, Geiss BJ, Bougie I, Picard-Jean F, Despins S, Mayette J, Hobdey SE, Bisaillon M. The flavivirus NS5 protein is a true RNA guanylyltransferase that catalyzes a two-step reaction to form the RNA cap structure. RNA. 2009 Dec;15(12):2340-50. doi: 10.1261/rna.1609709. Epub 2009 Oct 22. PMID:19850911 doi:10.1261/rna.1609709
- ↑ Amberg SM, Nestorowicz A, McCourt DW, Rice CM. NS2B-3 proteinase-mediated processing in the yellow fever virus structural region: in vitro and in vivo studies. J Virol. 1994 Jun;68(6):3794-802. PMID:8189517
- ↑ Lindenbach BD, Rice CM. trans-Complementation of yellow fever virus NS1 reveals a role in early RNA replication. J Virol. 1997 Dec;71(12):9608-17. PMID:9371625
- ↑ Munoz-Jordan JL, Laurent-Rolle M, Ashour J, Martinez-Sobrido L, Ashok M, Lipkin WI, Garcia-Sastre A. Inhibition of alpha/beta interferon signaling by the NS4B protein of flaviviruses. J Virol. 2005 Jul;79(13):8004-13. PMID:15956546 doi:10.1128/JVI.79.13.8004-8013.2005
- ↑ Zhou Y, Ray D, Zhao Y, Dong H, Ren S, Li Z, Guo Y, Bernard KA, Shi PY, Li H. Structure and function of flavivirus NS5 methyltransferase. J Virol. 2007 Apr;81(8):3891-903. Epub 2007 Jan 31. PMID:17267492 doi:10.1128/JVI.02704-06
- ↑ Issur M, Geiss BJ, Bougie I, Picard-Jean F, Despins S, Mayette J, Hobdey SE, Bisaillon M. The flavivirus NS5 protein is a true RNA guanylyltransferase that catalyzes a two-step reaction to form the RNA cap structure. RNA. 2009 Dec;15(12):2340-50. doi: 10.1261/rna.1609709. Epub 2009 Oct 22. PMID:19850911 doi:10.1261/rna.1609709
- ↑ Amberg SM, Nestorowicz A, McCourt DW, Rice CM. NS2B-3 proteinase-mediated processing in the yellow fever virus structural region: in vitro and in vivo studies. J Virol. 1994 Jun;68(6):3794-802. PMID:8189517
- ↑ Lindenbach BD, Rice CM. trans-Complementation of yellow fever virus NS1 reveals a role in early RNA replication. J Virol. 1997 Dec;71(12):9608-17. PMID:9371625
- ↑ Munoz-Jordan JL, Laurent-Rolle M, Ashour J, Martinez-Sobrido L, Ashok M, Lipkin WI, Garcia-Sastre A. Inhibition of alpha/beta interferon signaling by the NS4B protein of flaviviruses. J Virol. 2005 Jul;79(13):8004-13. PMID:15956546 doi:10.1128/JVI.79.13.8004-8013.2005
- ↑ Zhou Y, Ray D, Zhao Y, Dong H, Ren S, Li Z, Guo Y, Bernard KA, Shi PY, Li H. Structure and function of flavivirus NS5 methyltransferase. J Virol. 2007 Apr;81(8):3891-903. Epub 2007 Jan 31. PMID:17267492 doi:10.1128/JVI.02704-06
- ↑ Issur M, Geiss BJ, Bougie I, Picard-Jean F, Despins S, Mayette J, Hobdey SE, Bisaillon M. The flavivirus NS5 protein is a true RNA guanylyltransferase that catalyzes a two-step reaction to form the RNA cap structure. RNA. 2009 Dec;15(12):2340-50. doi: 10.1261/rna.1609709. Epub 2009 Oct 22. PMID:19850911 doi:10.1261/rna.1609709
- ↑ Amberg SM, Nestorowicz A, McCourt DW, Rice CM. NS2B-3 proteinase-mediated processing in the yellow fever virus structural region: in vitro and in vivo studies. J Virol. 1994 Jun;68(6):3794-802. PMID:8189517
- ↑ Lindenbach BD, Rice CM. trans-Complementation of yellow fever virus NS1 reveals a role in early RNA replication. J Virol. 1997 Dec;71(12):9608-17. PMID:9371625
- ↑ Munoz-Jordan JL, Laurent-Rolle M, Ashour J, Martinez-Sobrido L, Ashok M, Lipkin WI, Garcia-Sastre A. Inhibition of alpha/beta interferon signaling by the NS4B protein of flaviviruses. J Virol. 2005 Jul;79(13):8004-13. PMID:15956546 doi:10.1128/JVI.79.13.8004-8013.2005
- ↑ Zhou Y, Ray D, Zhao Y, Dong H, Ren S, Li Z, Guo Y, Bernard KA, Shi PY, Li H. Structure and function of flavivirus NS5 methyltransferase. J Virol. 2007 Apr;81(8):3891-903. Epub 2007 Jan 31. PMID:17267492 doi:10.1128/JVI.02704-06
- ↑ Issur M, Geiss BJ, Bougie I, Picard-Jean F, Despins S, Mayette J, Hobdey SE, Bisaillon M. The flavivirus NS5 protein is a true RNA guanylyltransferase that catalyzes a two-step reaction to form the RNA cap structure. RNA. 2009 Dec;15(12):2340-50. doi: 10.1261/rna.1609709. Epub 2009 Oct 22. PMID:19850911 doi:10.1261/rna.1609709
- ↑ Amberg SM, Nestorowicz A, McCourt DW, Rice CM. NS2B-3 proteinase-mediated processing in the yellow fever virus structural region: in vitro and in vivo studies. J Virol. 1994 Jun;68(6):3794-802. PMID:8189517
- ↑ Lindenbach BD, Rice CM. trans-Complementation of yellow fever virus NS1 reveals a role in early RNA replication. J Virol. 1997 Dec;71(12):9608-17. PMID:9371625
- ↑ Munoz-Jordan JL, Laurent-Rolle M, Ashour J, Martinez-Sobrido L, Ashok M, Lipkin WI, Garcia-Sastre A. Inhibition of alpha/beta interferon signaling by the NS4B protein of flaviviruses. J Virol. 2005 Jul;79(13):8004-13. PMID:15956546 doi:10.1128/JVI.79.13.8004-8013.2005
- ↑ Zhou Y, Ray D, Zhao Y, Dong H, Ren S, Li Z, Guo Y, Bernard KA, Shi PY, Li H. Structure and function of flavivirus NS5 methyltransferase. J Virol. 2007 Apr;81(8):3891-903. Epub 2007 Jan 31. PMID:17267492 doi:10.1128/JVI.02704-06
- ↑ Issur M, Geiss BJ, Bougie I, Picard-Jean F, Despins S, Mayette J, Hobdey SE, Bisaillon M. The flavivirus NS5 protein is a true RNA guanylyltransferase that catalyzes a two-step reaction to form the RNA cap structure. RNA. 2009 Dec;15(12):2340-50. doi: 10.1261/rna.1609709. Epub 2009 Oct 22. PMID:19850911 doi:10.1261/rna.1609709
- ↑ Amberg SM, Nestorowicz A, McCourt DW, Rice CM. NS2B-3 proteinase-mediated processing in the yellow fever virus structural region: in vitro and in vivo studies. J Virol. 1994 Jun;68(6):3794-802. PMID:8189517
- ↑ Lindenbach BD, Rice CM. trans-Complementation of yellow fever virus NS1 reveals a role in early RNA replication. J Virol. 1997 Dec;71(12):9608-17. PMID:9371625
- ↑ Munoz-Jordan JL, Laurent-Rolle M, Ashour J, Martinez-Sobrido L, Ashok M, Lipkin WI, Garcia-Sastre A. Inhibition of alpha/beta interferon signaling by the NS4B protein of flaviviruses. J Virol. 2005 Jul;79(13):8004-13. PMID:15956546 doi:10.1128/JVI.79.13.8004-8013.2005
- ↑ Zhou Y, Ray D, Zhao Y, Dong H, Ren S, Li Z, Guo Y, Bernard KA, Shi PY, Li H. Structure and function of flavivirus NS5 methyltransferase. J Virol. 2007 Apr;81(8):3891-903. Epub 2007 Jan 31. PMID:17267492 doi:10.1128/JVI.02704-06
- ↑ Issur M, Geiss BJ, Bougie I, Picard-Jean F, Despins S, Mayette J, Hobdey SE, Bisaillon M. The flavivirus NS5 protein is a true RNA guanylyltransferase that catalyzes a two-step reaction to form the RNA cap structure. RNA. 2009 Dec;15(12):2340-50. doi: 10.1261/rna.1609709. Epub 2009 Oct 22. PMID:19850911 doi:10.1261/rna.1609709
- ↑ Amberg SM, Nestorowicz A, McCourt DW, Rice CM. NS2B-3 proteinase-mediated processing in the yellow fever virus structural region: in vitro and in vivo studies. J Virol. 1994 Jun;68(6):3794-802. PMID:8189517
- ↑ Lindenbach BD, Rice CM. trans-Complementation of yellow fever virus NS1 reveals a role in early RNA replication. J Virol. 1997 Dec;71(12):9608-17. PMID:9371625
- ↑ Munoz-Jordan JL, Laurent-Rolle M, Ashour J, Martinez-Sobrido L, Ashok M, Lipkin WI, Garcia-Sastre A. Inhibition of alpha/beta interferon signaling by the NS4B protein of flaviviruses. J Virol. 2005 Jul;79(13):8004-13. PMID:15956546 doi:10.1128/JVI.79.13.8004-8013.2005
- ↑ Zhou Y, Ray D, Zhao Y, Dong H, Ren S, Li Z, Guo Y, Bernard KA, Shi PY, Li H. Structure and function of flavivirus NS5 methyltransferase. J Virol. 2007 Apr;81(8):3891-903. Epub 2007 Jan 31. PMID:17267492 doi:10.1128/JVI.02704-06
- ↑ Issur M, Geiss BJ, Bougie I, Picard-Jean F, Despins S, Mayette J, Hobdey SE, Bisaillon M. The flavivirus NS5 protein is a true RNA guanylyltransferase that catalyzes a two-step reaction to form the RNA cap structure. RNA. 2009 Dec;15(12):2340-50. doi: 10.1261/rna.1609709. Epub 2009 Oct 22. PMID:19850911 doi:10.1261/rna.1609709
- ↑ Amberg SM, Nestorowicz A, McCourt DW, Rice CM. NS2B-3 proteinase-mediated processing in the yellow fever virus structural region: in vitro and in vivo studies. J Virol. 1994 Jun;68(6):3794-802. PMID:8189517
- ↑ Lindenbach BD, Rice CM. trans-Complementation of yellow fever virus NS1 reveals a role in early RNA replication. J Virol. 1997 Dec;71(12):9608-17. PMID:9371625
- ↑ Munoz-Jordan JL, Laurent-Rolle M, Ashour J, Martinez-Sobrido L, Ashok M, Lipkin WI, Garcia-Sastre A. Inhibition of alpha/beta interferon signaling by the NS4B protein of flaviviruses. J Virol. 2005 Jul;79(13):8004-13. PMID:15956546 doi:10.1128/JVI.79.13.8004-8013.2005
- ↑ Zhou Y, Ray D, Zhao Y, Dong H, Ren S, Li Z, Guo Y, Bernard KA, Shi PY, Li H. Structure and function of flavivirus NS5 methyltransferase. J Virol. 2007 Apr;81(8):3891-903. Epub 2007 Jan 31. PMID:17267492 doi:10.1128/JVI.02704-06
- ↑ Issur M, Geiss BJ, Bougie I, Picard-Jean F, Despins S, Mayette J, Hobdey SE, Bisaillon M. The flavivirus NS5 protein is a true RNA guanylyltransferase that catalyzes a two-step reaction to form the RNA cap structure. RNA. 2009 Dec;15(12):2340-50. doi: 10.1261/rna.1609709. Epub 2009 Oct 22. PMID:19850911 doi:10.1261/rna.1609709
- ↑ Amberg SM, Nestorowicz A, McCourt DW, Rice CM. NS2B-3 proteinase-mediated processing in the yellow fever virus structural region: in vitro and in vivo studies. J Virol. 1994 Jun;68(6):3794-802. PMID:8189517
- ↑ Lindenbach BD, Rice CM. trans-Complementation of yellow fever virus NS1 reveals a role in early RNA replication. J Virol. 1997 Dec;71(12):9608-17. PMID:9371625
- ↑ Munoz-Jordan JL, Laurent-Rolle M, Ashour J, Martinez-Sobrido L, Ashok M, Lipkin WI, Garcia-Sastre A. Inhibition of alpha/beta interferon signaling by the NS4B protein of flaviviruses. J Virol. 2005 Jul;79(13):8004-13. PMID:15956546 doi:10.1128/JVI.79.13.8004-8013.2005
- ↑ Zhou Y, Ray D, Zhao Y, Dong H, Ren S, Li Z, Guo Y, Bernard KA, Shi PY, Li H. Structure and function of flavivirus NS5 methyltransferase. J Virol. 2007 Apr;81(8):3891-903. Epub 2007 Jan 31. PMID:17267492 doi:10.1128/JVI.02704-06
- ↑ Issur M, Geiss BJ, Bougie I, Picard-Jean F, Despins S, Mayette J, Hobdey SE, Bisaillon M. The flavivirus NS5 protein is a true RNA guanylyltransferase that catalyzes a two-step reaction to form the RNA cap structure. RNA. 2009 Dec;15(12):2340-50. doi: 10.1261/rna.1609709. Epub 2009 Oct 22. PMID:19850911 doi:10.1261/rna.1609709
- ↑ Amberg SM, Nestorowicz A, McCourt DW, Rice CM. NS2B-3 proteinase-mediated processing in the yellow fever virus structural region: in vitro and in vivo studies. J Virol. 1994 Jun;68(6):3794-802. PMID:8189517
- ↑ Lindenbach BD, Rice CM. trans-Complementation of yellow fever virus NS1 reveals a role in early RNA replication. J Virol. 1997 Dec;71(12):9608-17. PMID:9371625
- ↑ Munoz-Jordan JL, Laurent-Rolle M, Ashour J, Martinez-Sobrido L, Ashok M, Lipkin WI, Garcia-Sastre A. Inhibition of alpha/beta interferon signaling by the NS4B protein of flaviviruses. J Virol. 2005 Jul;79(13):8004-13. PMID:15956546 doi:10.1128/JVI.79.13.8004-8013.2005
- ↑ Zhou Y, Ray D, Zhao Y, Dong H, Ren S, Li Z, Guo Y, Bernard KA, Shi PY, Li H. Structure and function of flavivirus NS5 methyltransferase. J Virol. 2007 Apr;81(8):3891-903. Epub 2007 Jan 31. PMID:17267492 doi:10.1128/JVI.02704-06
- ↑ Issur M, Geiss BJ, Bougie I, Picard-Jean F, Despins S, Mayette J, Hobdey SE, Bisaillon M. The flavivirus NS5 protein is a true RNA guanylyltransferase that catalyzes a two-step reaction to form the RNA cap structure. RNA. 2009 Dec;15(12):2340-50. doi: 10.1261/rna.1609709. Epub 2009 Oct 22. PMID:19850911 doi:10.1261/rna.1609709
- ↑ Pan Q, Chen Q, Zhang W, Jiao H, Yu L, Hu H. Structural Insights into the Dynamic Assembly of a YFV sNS1 Tetramer. Viruses. 2024 Jul 29;16(8):1212. PMID:39205186 doi:10.3390/v16081212
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