Abstract:
:Beta-peptides (beta-amino acid oligomers) that mimic the amphiphilic, helical, and cationic properties of natural antimicrobial peptides have previously been shown to display antifungal activity against planktonic Candida albicans cells. Beta-peptides offer several advantages over conventional peptides composed of alpha-amino acid residues, including conformational stability, resistance to proteases, and activity at physiological salt concentrations. We examined sequence-activity relationships toward both planktonic C. albicans cells and C. albicans biofilms, and the results suggest a toxicity mechanism involving membrane disruption. A strategy for fluorescently labeling a beta-peptide without diminishing antifungal activity was devised; labeled beta-peptides penetrated the cell membrane and accumulated in the cytoplasm of both planktonic and biofilm-associated cells. The labeled beta-peptide was detected only in metabolically inactive cells, which suggests that beta-peptide entry is correlated with cell death. The presence of a beta-peptide at a concentration near the minimum inhibitory concentration completely prevented planktonic C. albicans cells from forming a biofilm, suggesting that beta-peptides may be useful in preventing fungal colonization and biofilm formation.
journal_name
ACS Chem Bioljournal_title
ACS chemical biologyauthors
Karlsson AJ,Pomerantz WC,Neilsen KJ,Gellman SH,Palecek SPdoi
10.1021/cb900093rsubject
Has Abstractpub_date
2009-07-17 00:00:00pages
567-79issue
7eissn
1554-8929issn
1554-8937journal_volume
4pub_type
杂志文章abstract::Ubc13 is an E2 ubiquitin conjugating enzyme that functions in nuclear DNA damage signaling and cytoplasmic NF-κB signaling. Here, we present the structures of complexes of Ubc13 with two inhibitors, NSC697923 and BAY 11-7082, which inhibit DNA damage and NF-κB signaling in human cells. NSC697923 and BAY 11-7082 both i...
journal_title:ACS chemical biology
pub_type: 杂志文章
doi:10.1021/acschembio.5b00222
更新日期:2015-07-17 00:00:00
abstract::Determining the impact of lipid electrophile-mediated protein damage that occurs during oxidative stress requires a comprehensive analysis of electrophile targets adducted under pathophysiological conditions. Incorporation of ω-alkynyl linoleic acid into the phospholipids of macrophages prior to activation by Kdo2-lip...
journal_title:ACS chemical biology
pub_type: 杂志文章
doi:10.1021/acschembio.7b00480
更新日期:2017-08-18 00:00:00
abstract::Kinetic parameters of protein-ligand interactions are progressively acknowledged as valuable information for rational drug discovery. However, a targeted optimization of binding kinetics is not easy to achieve, and further systematic studies are necessary to increase the understanding about molecular mechanisms involv...
journal_title:ACS chemical biology
pub_type: 杂志文章
doi:10.1021/acschembio.6b00979
更新日期:2017-01-20 00:00:00
abstract::The heterologous biosynthesis of complex natural products has enabled access to polyketide, nonribosomal peptide, isoprenoid, and other compounds with wide-spanning societal value. Though several surrogate host systems exist, Escherichia coli is often a preferred choice due to its rapid growth kinetics and extensive m...
journal_title:ACS chemical biology
pub_type: 杂志文章
doi:10.1021/acschembio.9b00827
更新日期:2020-05-15 00:00:00
abstract::The goal of incorporating renewable carbon into the fuel and chemical enterprise will most likely be successful when combined systems of biocatalysts and chemical catalysts are exploited. Significant efforts in the biocatalytic release of sugars from biomass are being pursued for subsequent use in fermentation. Two re...
journal_title:ACS chemical biology
pub_type: 杂志文章
doi:10.1021/cb7001522
更新日期:2007-08-17 00:00:00
abstract::The Siglec family of sialic acid-binding proteins are differentially expressed on white blood cells of the immune system and represent an attractive class of targets for cell-directed therapy. Nanoparticles decorated with high-affinity Siglec ligands show promise for delivering cargo to Siglec-bearing cells, but this ...
journal_title:ACS chemical biology
pub_type: 信件
doi:10.1021/cb400125w
更新日期:2013-07-19 00:00:00
abstract::We have developed a chemically controlled very long-acting delivery system to support once-monthly administration of a peptidic GLP-1R agonist. Initially, the prototypical GLP-1R agonist exenatide was covalently attached to hydrogel microspheres by a self-cleaving β-eliminative linker; after subcutaneous injection in ...
journal_title:ACS chemical biology
pub_type: 杂志文章
doi:10.1021/acschembio.7b00218
更新日期:2017-08-18 00:00:00
abstract::Leishmaniases affect the poorest people on earth and have no effective drug therapy. Here, we present the crystal structure of the mitochondrial isoform of class I fumarate hydratase (FH) from Leishmania major and compare it to the previously determined cytosolic Leishmania major isoform. We further describe the mecha...
journal_title:ACS chemical biology
pub_type: 杂志文章
doi:10.1021/acschembio.8b00972
更新日期:2019-02-15 00:00:00
abstract::Mutations that constitutively activate the phosphatidyl-inositol-3-kinase (PI3K) signaling pathway, including alterations in PI3K, PTEN, and AKT, are found in a variety of human cancers, implicating the PI3K lipid kinase as an attractive target for the development of therapeutic agents to treat cancer and other relate...
journal_title:ACS chemical biology
pub_type: 杂志文章
doi:10.1021/cb800039y
更新日期:2008-05-16 00:00:00
abstract::The remodeling of active sites to generate novel biocatalysts is an attractive and challenging task. We developed a stepwise loop insertion strategy (StLois), in which randomized residue pairs are inserted into active site loops. The phosphotriesterase-like lactonase from Geobacillus kaustophilus (GkaP-PLL) was used t...
journal_title:ACS chemical biology
pub_type: 杂志文章
doi:10.1021/acschembio.7b00018
更新日期:2017-05-19 00:00:00
abstract::Polyhalogenated dibenzo-p-dioxins are arguably among the most toxic molecules known to man. In addition to anthropogenic sources, marine invertebrates also harbor polybrominated dibenzo-p-dioxins of as yet unknown biogenic origin. Here, we report that the bmp gene locus in marine bacteria, a recently characterized sou...
journal_title:ACS chemical biology
pub_type: 信件
doi:10.1021/cb5004338
更新日期:2014-09-19 00:00:00
abstract::The perturbation of protein kinases with small organic molecules is a powerful approach to dissect kinase function in complex biological systems. Covalent kinase inhibitors that target thiols in the ATP binding pocket of the kinase domain proved to be ideal reagents for the investigation of highly dynamic cellular pro...
journal_title:ACS chemical biology
pub_type: 杂志文章
doi:10.1021/cb200465c
更新日期:2012-04-20 00:00:00
abstract::Miniproteins have a size between that of larger biologics and small molecules and presumably possess the advantages of both; they represent an expanding class of promising scaffolds for the design of affinity reagents, enzymes, and therapeutics. Conventional strategies to promote cellular uptake of miniproteins rely o...
journal_title:ACS chemical biology
pub_type: 杂志文章
doi:10.1021/acschembio.8b00564
更新日期:2018-11-16 00:00:00
abstract::Recent advances in understanding the relevance of noncoding RNA (ncRNA) to disease have increased interest in drugging ncRNA with small molecules. The recent discovery of ribocil, a structurally distinct synthetic mimic of the natural ligand of the flavin mononucleotide (FMN) riboswitch, has revealed the potential che...
journal_title:ACS chemical biology
pub_type: 杂志文章
doi:10.1021/acschembio.7b01013
更新日期:2018-03-16 00:00:00
abstract::MbtA is an adenylating enzyme from Mycobacterium tuberculosis that catalyzes the first step in the biosynthesis of the mycobactins. A bisubstrate inhibitor of MbtA (Sal-AMS) was previously described that displays potent antitubercular activity under iron-replete as well as iron-deficient growth conditions. This findin...
journal_title:ACS chemical biology
pub_type: 杂志文章
doi:10.1021/cb300112x
更新日期:2012-10-19 00:00:00
abstract::Conotoxins are small disulfide-rich peptides from the venom of cone snails. Along with other conopeptides, they target a wide range of membrane receptors, ion channels, and transporters, and because of their high potency and selectivity for defined subtypes of these receptors, they have attracted a great deal of atten...
journal_title:ACS chemical biology
pub_type: 杂志文章,评审
doi:10.1021/cb700091j
更新日期:2007-07-20 00:00:00
abstract::Vitamin A serves essential functions in mammalian biology as a signaling molecule and chromophore. This lipid can be synthesized from more than 50 putative dietary provitamin A precursor molecules which contain at least one unsubstituted β-ionone ring. We here scrutinized the enzymatic properties and substrate specifi...
journal_title:ACS chemical biology
pub_type: 杂志文章
doi:10.1021/acschembio.8b00290
更新日期:2018-08-17 00:00:00
abstract::New methodologies for site-specifically radiolabeling proteins with (18)F are required to generate high quality radiotracers for preclinical and clinical applications with positron emission tomography. Herein, we report an approach by which we use lipoic acid ligase (LplA) to conjugate [(18)F]-fluorooctanoic acid to a...
journal_title:ACS chemical biology
pub_type: 杂志文章
doi:10.1021/acschembio.6b00172
更新日期:2016-06-17 00:00:00
abstract::3-Oxo-β-sultams are four-membered ring ambident electrophiles that can react with nucleophiles either at the carbonyl carbon or at the sulfonyl sulfur atoms, and that have been reported to inhibit serine hydrolases via acylation of the active-site serine residue. We have developed a panel of 3-oxo-β-sultam inhibitors ...
journal_title:ACS chemical biology
pub_type: 杂志文章
doi:10.1021/acschembio.0c00090
更新日期:2020-04-17 00:00:00
abstract::The β-hydroxylation of l-histidine is the first step in the biosynthesis of the imidazolone base of the antifungal drug nikkomycin. The cytochrome P450 (NikQ) hydroxylates the amino acid while it is appended via a phosphopantetheine linker to the non-ribosomal peptide synthetase (NRPS) NikP1. The latter enzyme is comp...
journal_title:ACS chemical biology
pub_type: 杂志文章
doi:10.1021/acschembio.7b00081
更新日期:2017-05-19 00:00:00
abstract::Functionally selective ligands stabilize conformations of G protein-coupled receptors (GPCRs) that induce a preference for signaling via a subset of the intracellular pathways activated by the endogenous agonists. The possibility to fine-tune the functional activity of a receptor provides opportunities to develop drug...
journal_title:ACS chemical biology
pub_type: 杂志文章
doi:10.1021/acschembio.7b00493
更新日期:2017-10-20 00:00:00
abstract::A strategy has been established for the synthesis of a family of bifunctional HIV-1 inhibitor covalent conjugates with the potential to bind simultaneously to both the gp120 and gp41 subunits of the HIV-1 envelope glycoprotein trimeric complex (Env). One component of the conjugates is derived from BNM-III-170, a small...
journal_title:ACS chemical biology
pub_type: 杂志文章
doi:10.1021/acschembio.0c00888
更新日期:2021-01-15 00:00:00
abstract::Streptolysin S (SLS) is a post-translationally modified peptide cytolysin that is produced by the human pathogen Streptococcus pyogenes. SLS belongs to a large family of azole-containing natural products that are biosynthesized via an evolutionarily conserved pathway. SLS is an important virulence factor during S. pyo...
journal_title:ACS chemical biology
pub_type: 杂志文章
doi:10.1021/cb500843r
更新日期:2015-05-15 00:00:00
abstract::RNA modifications play important roles in RNA structures and regulation of gene expression and translation. We report the first RNA modification on the phosphate, the RNA phosphorothioate (PS) modification, discovered in both prokaryotes and eukaryotes. The PS modification is also first reported on nucleic acids of eu...
journal_title:ACS chemical biology
pub_type: 杂志文章
doi:10.1021/acschembio.0c00163
更新日期:2020-06-19 00:00:00
abstract::Next-generation DNA sequencing technologies have led to a massive accumulation of genomic and transcriptomic data from patients and healthy individuals. The major challenge ahead is to understand the functional significance of the elements of the human genome and transcriptome, and implications for diagnosis and treat...
journal_title:ACS chemical biology
pub_type: 杂志文章,评审
doi:10.1021/acschembio.7b00657
更新日期:2018-02-16 00:00:00
abstract::Caged compounds are useful tools for precise spatiotemporal modulation of cell functions, but in most cases uncaging requires ultraviolet (UV) light, which is cytotoxic and has limited tissue penetration. Therefore, caged compounds that can be activated by longer-wavelength light are required. Here we describe a novel...
journal_title:ACS chemical biology
pub_type: 信件
doi:10.1021/cb500525p
更新日期:2014-10-17 00:00:00
abstract::Spinal muscular atrophy (SMA) is caused by deletion or mutation of both copies of the SMN1 gene, which produces an essential protein known as SMN. The severity of SMA is modified by variable copy number of a second gene,SMN2, which produces an mRNA that is incorrectly spliced with deletion of the last exon. We describ...
journal_title:ACS chemical biology
pub_type: 杂志文章
doi:10.1021/cb800120t
更新日期:2008-11-21 00:00:00
abstract::The indole side chain of tryptophan has latent nucleophilic reactivity at both N1 and all six (nonbridgehead) carbons, which is not generally manifested in post-translational reactions of proteins. On the other hand, all seven positions can be prenylated by the primary metabolite Δ(2)-isopentenyl diphosphate by dimeth...
journal_title:ACS chemical biology
pub_type: 杂志文章,评审
doi:10.1021/cb500695k
更新日期:2014-12-19 00:00:00
abstract::Desferrioxamine B (DFOB) was discovered in the late 1950s as a hydroxamic acid metabolite of the soil bacterium Streptomyces pilosus. The exquisite affinity of DFOB for Fe(III) identified its potential for removing excess iron from patients with transfusion-dependent hemoglobin disorders. Many studies have used semisy...
journal_title:ACS chemical biology
pub_type: 杂志文章,评审
doi:10.1021/acschembio.7b00851
更新日期:2018-01-19 00:00:00
abstract::Base deamination is a common type of DNA damage that occurs in all organisms. DNA repair mechanisms are critical to maintain genome integrity, in which the base excision repair pathway plays an essential role. In the BER pathway, the uracil DNA glycosylase superfamily is responsible for removing the deaminated bases f...
journal_title:ACS chemical biology
pub_type: 杂志文章
doi:10.1021/acschembio.6b00164
更新日期:2016-06-17 00:00:00