H. Blackwell

Publications152
h-index46
Citations6,505
Highly Influential Citations135
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Identification of a Class of Small Molecule Inhibitors of the Sirtuin Family of NAD-dependent Deacetylases by Phenotypic Screening*
The yeast transcriptional repressor Sir2p silences gene expression from the telomeric, rDNA, and silent mating-type loci and may play a role in higher order processes such as aging. Sir2p is the… Expand
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SIR1, an Upstream Component in Auxin Signaling Identified by Chemical Genetics
Auxin is a plant hormone that regulates many aspects of plant growth and development. We used a chemical genetics approach to identify SIR1, a regulator of many auxin-inducible genes. The sir1 mutant… Expand
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Plant Responses to Bacterial N-Acyl l-Homoserine Lactones are Dependent on Enzymatic Degradation to l-Homoserine
Many bacteria use quorum sensing (QS) to regulate phenotypes that ultimately benefit the bacterial population at high cell densities. These QS-dependent phenotypes are diverse and can have… Expand
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Small molecule inhibitors of bacterial quorum sensing and biofilm formation.
Bacteria monitor their local population densities using small molecules (or autoinducers) in a process known as quorum sensing. Here, we report a new and efficient synthetic route to naturally… Expand
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New and unexpected insights into the modulation of LuxR-type quorum sensing by cyclic dipeptides.
Quorum sensing (QS) is under the control of N-acylated l-homoserine lactones (AHLs) and their cognate receptors (LuxR-type proteins) in Gram-negative bacteria and plays a major role in mediating… Expand
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Control of quorum sensing by a Burkholderia pseudomallei multidrug efflux pump.
The Burkholderia pseudomallei KHW quorum-sensing systems produced N-octanoyl-homoserine lactone, N-decanoyl-homoserine lactone, N-(3-hydroxy)-octanoyl-homoserine lactone,… Expand
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Highly potent inhibitors of quorum sensing in Staphylococcus aureus revealed through a systematic synthetic study of the group-III autoinducing peptide.
Methods to intercept bacterial quorum sensing (QS) have attracted significant attention as potential anti-infective therapies. Staphylococcus aureus is a major human pathogen that utilizes… Expand
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Highly Efficient Synthesis of Covalently Cross-Linked Peptide Helices by Ring-Closing Metathesis.
Olefin metathesis has been successfully applied to the synthesis of macrocyclic helical peptides [Eq. (a)]. Carbon-carbon bond tethers between amino acid side chains were introduced by ring-closing… Expand
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Modulation of bacterial quorum sensing with synthetic ligands: systematic evaluation of N-acylated homoserine lactones in multiple species and new insights into their mechanisms of action.
Bacteria use a language of low molecular weight ligands to assess their population densities in a process called quorum sensing. This chemical signaling process plays a pivotal role both in the… Expand
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Isovaleryl-homoserine lactone, an unusual branched-chain quorum-sensing signal from the soybean symbiont Bradyrhizobium japonicum
Many species of Proteobacteria communicate by using LuxI-LuxR–type quorum-sensing systems that produce and detect acyl-homoserine lactone (acyl-HSL) signals. Most of the known signals are… Expand
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