4j4v

Pentameric SFTSVN with suramin

spinqualitylabelsall models 4j4v, resolution 2.30Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4j4v is a 5 chain structure with sequence from Phlebovirus JS2010-018. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.303Å Ligands: SVR Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function NCAP_SFTS Encapsidates the genomic RNA, protecting it from nucleases. Displays high affinity for single-stranded nucleic acid. The encapsidated genomic RNA is termed the nucleocapsid (NC) or ribonucleoprotein (By similarity). The ribonucleoprotein has a non-helical structure (By similarity). Serves as template for viral transcription and replication. After replication, the nucleocapsid is recruited to the host Golgi apparatus by glycoprotein Gn for packaging into virus particles (By similarity).[UniProtKB:D3K5I7][UniProtKB:F1BA48][UniProtKB:P21700] Publication Abstract from PubMed Severe fever with thrombocytopenia syndrome is an emerging infectious disease caused by a novel bunyavirus (SFTSV). Lack of vaccines and inadequate therapeutic treatments have made the spread of the virus a global concern. Viral nucleocapsid protein (N) is essential for its transcription and replication. Here, we present the crystal structures of N from SFTSV and its homologs from Buenaventura (BUE) and Granada (GRA) viruses. The structures reveal that phleboviral N folds into a compact core domain and an extended N-terminal arm that mediates oligomerization, such as tetramer, pentamer, and hexamer of N assemblies. Structural superimposition indicates that phleboviral N adopts a conserved architecture and uses a similar RNA encapsidation strategy as that of RVFV-N. The RNA binding cavity runs along the inner edge of the ring-like assembly. A triple mutant of SFTSV-N, R64D/K67D/K74D, almost lost its ability to bind RNA in vitro, is deficient in its ability to transcribe and replicate. Structural studies of the mutant reveal that both alterations in quaternary assembly and the charge distribution contribute to the loss of RNA binding. In the screening of inhibitors Suramin was identified to bind phleboviral N specifically. The complex crystal structure of SFTSV-N with Suramin was refined to a 2.30-A resolution. Suramin was found sitting in the putative RNA binding cavity of SFTSV-N. The inhibitory effect of Suramin on SFTSV replication was confirmed in Vero cells. Therefore, a common Suramin-based therapeutic approach targeting SFTSV-N and its homologs could be developed for containing phleboviral outbreaks. Structure of severe Fever with thrombocytopenia syndrome virus nucleocapsid protein in complex with suramin reveals therapeutic potential.,Jiao L, Ouyang S, Liang M, Niu F, Shaw N, Wu W, Ding W, Jin C, Peng Y, Zhu Y, Zhang F, Wang T, Li C, Zuo X, Luan CH, Li D, Liu ZJ J Virol. 2013 Jun;87(12):6829-39. doi: 10.1128/JVI.00672-13. Epub 2013 Apr 10. PMID:23576501 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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