Critical Salt Bridges Guide Capsid Assembly, Stability, and Maturation Behavior in Bacteriophage HK97
نویسندگان
چکیده
منابع مشابه
Maturation dynamics of bacteriophage HK97 capsid.
Maturation of the bacteriophage HK97 capsid requires a large conformational change of the virus capsid. Experimental studies have identified several intermediates along this maturation pathway. To gain insights into the molecular mechanisms of capsid maturation, we examined the fluctuation dynamics of the procapsid and mature capsid using a residue-level computational approach. The most coopera...
متن کاملpH-Induced Stability Switching of the Bacteriophage HK97 Maturation Pathway
Many viruses undergo large-scale conformational changes during their life cycles. Blocking the transition from one stage of the life cycle to the next is an attractive strategy for the development of antiviral compounds. In this work, we have constructed an icosahedrally symmetric, low-energy pathway for the maturation transition of bacteriophage HK97. By conducting constant-pH molecular dynami...
متن کاملCrosslinking renders bacteriophage HK97 capsid maturation irreversible and effects an essential stabilization.
In HK97 capsid maturation, structural change ('expansion') is accompanied by formation of covalent crosslinks, connecting residue K169 in the 'E-loop' of each subunit with N356 on another subunit. We show by complementation experiments with the K169Y mutant, which cannot crosslink, that crosslinking is an essential function. The precursor Prohead-II passes through three expansion intermediate (...
متن کاملTopologically linked protein rings in the bacteriophage HK97 capsid.
The crystal structure of the double-stranded DNA bacteriophage HK97 mature empty capsid was determined at 3.6 angstrom resolution. The 660 angstrom diameter icosahedral particle contains 420 subunits with a new fold. The final capsid maturation step is an autocatalytic reaction that creates 420 isopeptide bonds between proteins. Each subunit is joined to two of its neighbors by ligation of the ...
متن کاملGenetic basis of bacteriophage HK97 prohead assembly.
We report studies to determine which bacteriophage genes are required for assembly of phage HK97 proheads and what roles they play. We identify the gene encoding the major capsid protein of phage HK97 and report its DNA sequence, together with the DNA sequences of the two genes immediately upstream from it. When the capsid protein is expressed from a plasmid in the absence of other phage-encode...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Molecular & Cellular Proteomics
سال: 2010
ISSN: 1535-9476
DOI: 10.1074/mcp.m000039-mcp201