2vq0

Capsid structure of Sesbania mosaic virus coat protein deletion mutant rCP(delta 48 to 59)

spinqualitylabelsall models 2vq0, resolution 3.60Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2vq0 is a 3 chain structure with sequence from Sesbania mosaic virus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CA Related: 1x36, 1x33, 1x35, 1smv, 1vak, 1vb4, 1vb2 Resources: FirstGlance, OCA, RCSB, PDBsum Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed A unique feature of several T=3 icosahedral viruses is the presence of a structure called the beta-annulus formed by extensive hydrogen bonding between protein subunits related by icosahedral three-fold axis of symmetry. This unique structure has been suggested as a molecular switch that determines the T=3 capsid assembly. In order to examine the importance of the beta-annulus, a deletion mutant of Sesbania mosaic virus coat protein in which residues 48-59 involved in the formation of the beta-annulus were deleted retaining the rest of the residues in the amino terminal segment (rCP (Delta48-59)) was constructed. When expressed in Escherichia coli, the mutant protein assembled into virus like particles of sizes close to that of the wild type virus particles. The purified capsids were crystallized and their three dimensional structure was determined at 3.6 A resolution by X-ray crystallography. The mutant capsid structure closely resembled that of the native virus particles. However, surprisingly, the structure revealed that the assembly of the particles has proceeded without the formation of the beta-annulus. Therefore, the beta-annulus is not essential for T=3 capsid assembly as speculated earlier and may be formed as a consequence of the particle assembly. This is the first structural demonstration that the virus particle morphology with and without the beta-annulus could be closely similar. Structure of recombinant capsids formed by the beta-annulus deletion mutant -- rCP (Delta48-59) of Sesbania mosaic virus.,Pappachan A, Subashchandrabose C, Satheshkumar PS, Savithri HS, Murthy MR Virology. 2008 May 25;375(1):190-6. Epub 2008 Mar 4. PMID:18295296 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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