1if0
From Proteopedia
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PSEUDO-ATOMIC MODEL OF BACTERIOPHAGE HK97 PROCAPSID (PROHEAD II)
Overview
Large-scale conformational changes transform viral precursors into, infectious virions. The structure of bacteriophage HK97 capsid, Head-II, was recently solved by crystallography, revealing a catenated cross-linked, topology. We have visualized its precursor, Prohead-II, by cryoelectron, microscopy and modeled the conformational change by appropriately adapting, Head-II. Rigid-body rotations ( approximately 40 degrees) cause switching, to an entirely different set of interactions; in addition, two motifs, undergo refolding. These changes stabilize the capsid by increasing the, surface area buried at interfaces and bringing the cross-link-forming, residues, initially approximately 40 angstroms apart, close together. The, inner surface of Prohead-II is negatively charged, suggesting that the, transition is triggered electrostatically by DNA packaging.
About this Structure
1IF0 is a Single protein structure of sequence from Enterobacteria phage hk620. Full crystallographic information is available from OCA.
Reference
Virus maturation involving large subunit rotations and local refolding., Conway JF, Wikoff WR, Cheng N, Duda RL, Hendrix RW, Johnson JE, Steven AC, Science. 2001 Apr 27;292(5517):744-8. PMID:11326105
Page seeded by OCA on Tue Nov 20 17:21:15 2007
