Fab-based inhibitors reveal ubiquitin independent functions for HIV Vif neutralization of APOBEC3 restriction factors.

The lentiviral protein Viral Infectivity Factor (Vif) counteracts the antiviral effects of host APOBEC3 (A3) proteins and contributes to persistent HIV infection.Vif targets A3 restriction factors for ubiquitination and proteasomal degradation by recruiting them to a multi-protein ubiquitin E3 ligase complex.Here, we describe a degradation-independ

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Role of critical elements in botulinum neurotoxin complex in toxin routing across intestinal and bronchial barriers.

The highly potent botulinum neurotoxin serotype A (BoNT/A) inhibits neurotransmitter release at neuromuscular junctions resulting in flaccid muscle paralysis, respiratory arrest and death.In order to reach their neuronal cell topanga cooler tote targets, BoNT/A must cross epithelial cell barriers lining the intestines and airways.The toxin is produ

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