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Deprecated: Implicit conversion from float 267.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Cell+Host+Microbe 2012 ; 11 (5): 492-503 Nephropedia Template TP
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Bornavirus closely associates and segregates with host chromosomes to ensure persistent intranuclear infection #MMPMID22607802
Matsumoto Y; Hayashi Y; Omori H; Honda T; Daito T; Horie M; Ikuta K; Fujino K; Nakamura S; Schneider U; Chase G; Yoshimori T; Schwemmle M; Tomonaga K
Cell Host Microbe 2012[May]; 11 (5): 492-503 PMID22607802show ga
Bornaviruses are nonsegmented negative-strand RNA viruses that establish a persistent infection in the nucleus and occasionally integrate a DNA genome copy into the host chromosomal DNA. However, how these viruses achieve intranuclear infection remains unclear. We show that Borna disease virus (BDV), a mammalian bornavirus, closely associates with the cellular chromosome to ensure intranuclear infection. BDV generates viral factories within the nucleus using host chromatin as a scaffold. In addition, the viral ribonucleoprotein (RNP) interacts directly with the host chromosome throughout the cell cycle, using core histones as a docking platform. HMGB1, a host chromatin-remodeling DNA architectural protein, is required to stabilize RNP on chromosomes and for efficient BDV RNA transcription in the nucleus. During metaphase, the association of RNP with mitotic chromosomes allows the viral RNA to segregate into daughter cells and ensure persistent infection. Thus, bornaviruses likely evolved a chromosome-dependent life cycle to achieve stable intranuclear infection.