In cells, dedicated AAA+ ATPases deposit hexameric, ring-shaped helicases onto DNA to initiate chromosomal replication. To better understand the mechanisms by which helicase loading can occur, we used cryo-EM to determine sub-4-Å-resolution structures of the E. coli DnaB⋅DnaC helicase⋅loader complex with
The ClpP1P2 proteolytic complex is essential in Mycobacterium tuberculosis Proteolysis by ClpP1P2 requires an associated ATPase, either ClpX or ClpC1. Here, we sought to define the unique contributions of the ClpX ATPase to mycobacterial growth. We formally demonstrated that ClpX
Cell chemical biology, 26(4), 493-501 (2019-02-05)
Malayamycin A is an unusual bicyclic C-nucleoside, with interesting antiviral, antifungal, and anticancer bioactivity. We report here the discovery and characterization of the biosynthetic pathway to malayamycin by using genome mining of near-identical clusters both from the known producer Streptomyces
Photobleaching limits extended imaging of fluorescent biological samples. We developed DNA-based 'FluoroCubes' that are similar in size to the green fluorescent protein, have single-point attachment to proteins, have a ~54-fold higher photobleaching lifetime and emit ~43-fold more photons than single
RNF213 is the major susceptibility factor for Moyamoya disease, a progressive cerebrovascular disorder that often leads to brain stroke in adults and children. Characterization of disease-associated mutations has been complicated by the enormous size of RNF213. Here, we present the
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