Cell surface reactions of this kind should prove useful in the introduction of new recognition epitopes, such as peptides, oligosaccharides, or small organic molecules, onto cell surfaces and in the subsequent modulation of cell-cell or cell-small molecule binding events. A chemical transformation that permits the selective formation of covalent adducts among richly functionalized biopolymers within a cellular context is presented. Using rational prediction analysis to recognize putative internal myristoylation sites in caspase-cleaved proteins combined with our nonradioactive chemical detection method, we identify 5 new post-translationally myristoylatable proteins (PKC epsilon, CD-IC2, Bap31, MST3, and the catalytic subunit of glutamate cysteine ligase). B., Stein, G. S., Ayers, D. C., Bertozzi, C. R. Chemical Approaches To Perturb, Profile, and Perceive Glycans, PapA3 Is an Acyltransferase Required for Polyacyltrehalose Biosynthesis in Mycobacterium tuberculosis. Tissue paper blotting removed GalNAz-labeled surface cells, causing DAPI labeling (permeabilization) of underlying cells. View details for DOI 10.1016/j.chembiol.2004.05.009, View details for Web of Science ID 000222987300018, View details for DOI 10.1002/cbic.200300789, View details for Web of Science ID 000220196800018. View details for DOI 10.1002/cbic.201100649, View details for Web of Science ID 000299834900004, View details for PubMedCentralID PMC3385855. View details for DOI 10.1093/glycob/cwi064, View details for Web of Science ID 000230346400006. Agard, N. J., Prescher, J. Furthermore, DMN-Tre labeling was reduced by treatment with TB drugs, unlike the clinically used auramine stain. Additionally, we have utilized computational methods to understand the unique properties of these fully conjugated macrocycles. Breidenbach, M. A., Gallagher, J. E., King, D. S., Smart, B. P., Wu, P., Bertozzi, C. R. Copper-free click chemistry in living animals. Genome-scale knockout screens assigned putative functional relevance to the RNA-protein interactions observed by ChIRP-MS. The mutant and wild-type Mtb replicated similarly during the acute phase of infection, but the mutant showed reduced viability during the persistent phase of the infection. The profile, which comprised 546 proteins, suggests diverse functions of the phagosome and potential connections to secretory processes, toll-like receptor signaling, and autophagy. Using this knowledge, glycosyltransferase assembly lines have been redesigned for the production of specific glycan structures using protein engineering and chemical approaches. Most current diagnostic tests for tuberculosis do not reveal the species or strain of pathogen causing pulmonary infection, which can lead to inappropriate treatment regimens and the spread of disease. View details for Web of Science ID 000171601400045. The detailed quantitative parameters of ManLev metabolism in human and nonhuman-derived cell lines were determined to establish a foundation for the modification of cell surfaces with novel epitopes at defined cell-surface densities. Factors including glycan heterogeneity, low abundance, and low occupancy can complicate site mapping. Immunization of mice with either BCG or DeltacysH followed by infection with the virulent M. tuberculosis Erdman strain demonstrated that DeltacysH can generate protection equivalent to that of the BCG vaccine. Shao, Z., Flynn, R. A., Crowe, J. L., Zhu, Y., Liang, J., Jiang, W., Aryan, F., Aoude, P., Bertozzi, C. R., Estes, V. M., Lee, B. J., Bhagat, G., Zha, S., Calo, E. Deconvolution of Influenza a Viral Binding and Fusion with a Chemically-Defined Glycocalyx. Overall, our findings provide a quantitative characterization of O-GlcNAc glycoproteins and their corresponding modification sites in primary human T cells, which will facilitate mechanistic studies into the function of O-GlcNAc in T cell activation. Antibodies are widely used biomarkers for the diagnosis of many diseases. Tomlin, F. M., Gerling-Driessen, U. I., Liu, Y. C., Flynn, R. A., Vangala, J. R., Lentz, C. S., Clauder-Muenster, S. n., Jakob, P. n., Mueller, W. F., Ordoez-Rueda, D. n., Paulsen, M. n., Matsui, N. n., Foley, D. n., Rafalko, A. n., Suzuki, T. n., Bogyo, M. n., Steinmetz, L. M., Radhakrishnan, S. K., Bertozzi, C. R. Ingredients for a Positive Safety Culture. Portraits of the 2022 Nobel laureates in Chemistry Carolyn R. Bertozzi (L), Morten Meldal (C) and K. Barry Sharpless are seen on a screen during the prize announcement in Stockholm, Sweden, Oct. 5, 2022. filexlib. Methods for site-specific protein conjugation are critical to such efforts. CysQ, a 3'-phosphoadenosine-5'-phosphatase, is considered an important regulator of this pathway in plants, yeast, and other bacteria. Siegrist, M. S., Whiteside, S., Jewett, J. C., Aditham, A., Cava, F., Bertozzi, C. R. Strategy for Dual-Analyte Luciferin Imaging: In Vivo Bioluminescence Detection of Hydrogen Peroxide and Caspase Activity in a Murine Model of Acute Inflammation. Thus, for applications of bioorthogonal chemistry in living systems, we built upon Wittig and Krebs' observation with the design of cyclooctyne reagents that react rapidly and selectively with biomolecule-associated azides. In 2015 she became a professor of chemistry at Stanford University. Characterization of the metabolic fates of four TreAz analogues revealed unique labeling routes that can be harnessed for pathway-targeted investigation of the mycobacterial trehalome. We have demonstrated that the quadricyclane ligation is compatible with, and orthogonal to, strain-promoted azide-alkyne cycloaddition and oxime ligation chemistries by performing all three reactions in one pot on differentially functionalized protein substrates. This technique has been exploited in fundamental studies of glycan-dependent cell-cell and virus-cell interactions and also provides an avenue for the chemical remodelling of living cells. Compound 1-68A exhibits a K(I) of 54 muM and a maximal rate of inactivation (k(inact)) of 1.7 min(-1) at pH 7.4. Wei, W., Riley, N. M., Lyu, X., Bertozzi, C. R., Long, J. Riley, N. M., Bertozzi, C. R., Pitteri, S. J. Czlapinski, J. L., Schelle, M. W., Miller, L. W., Laughlin, S. T., Kohler, J. J., Cornish, V. W., Bertozzi, C. R. Structural Characterization of a Novel Sulfated Menaquinone produced by stf3 from Mycobacterium tuberculosis. They are difficult to study because of the complex interplay of 20 distinct glycosyltransferase isoenzymes that initiate this form of glycosylation, the polypeptide N-acetylgalactosaminyltransferases (GalNAc-Ts). We report here a study of mycomembrane dynamics that was enabled by trehalose-fluorophore conjugates capable of labeling trehalose glycolipids in live actinomycetes. Metabolic incorporation of d-alanine derivatives and click chemistry detection constitute a facile, modular platform that facilitates unprecedented spatial and temporal resolution of PG dynamics in vivo. Thus, we hypothesize that the species-specific phenotype of the stf0 mutant is reflective of differences in antimycobacterial effector mechanisms of macrophages. This review focuses on recent advances in chemical tools to study the specificity and dynamics of mammalian lectins in live cells. Given the sensitivity and negligible background provided by bioluminescence imaging (BLI), we reasoned that 1 might be able to overcome some of the limitations encountered with fluorescent phosphine probes. Luchansky, S. J., Goon, S., Bertozzi, C. R. Small molecule inhibitors of mucin-type O-linked glycosylation from a uridine-based library. However, a detailed structural analysis of S881 has remained elusive. Drake, P. M., Stock, C. M., Nathan, J. K., Gip, P., Golden, K. P., Weinhold, B., Gerardy-Schahn, R., Bertozzi, C. R. Selective Enrichment of Azide-Containing Peptides from Complex Mixtures. This Glycoforum article summarizes these recent changes. Johnson, J. In the present study, we expressed Rv2131c heterologously and found that the protein dephosphorylates PAP in a magnesium-dependent manner, with optimal activity observed between pH 8.5 and pH 9.5 using 0.5 mM MgCl 2. View details for DOI 10.1074/jbc.M313103200, View details for Web of Science ID 000222445300003. A. Sequential assembly of the septal cell envelope prior to V snapping in Corynebacterium glutamicum. In particular, GST-5 was found to catalyze 6-O-sulfation of beta-benzyl GlcNAc but not alpha- or beta-benzyl GalNAc. Such labeled proteins can then be treated with azide-functionalized probes to ligate affinity handles or fluorophores to the PKMT substrates. in these pages has relative advantages and disadvantages. A chemical approach to unraveling the biological function of the glycosylphosphatidylinositol anchor. The rapid assembly of "core 1"and "core 3" O-linked glycopeptide mimetics was accomplished in this fashion. Instead, MECA-79 bound preferentially to 6-sulfolactose. Further, we show that cells successfully incorporate synthetic GlcNAc analogs N-azidoacetyglucosamine (GlcNAz) and N-(4-pentynoyl)-glucosamine (GlcNAl) into cell-surface glycans and secreted glycoproteins. The building block was incorporated into a synthetic peptide derived from the active site of a Mycobacterium tuberculosis sulfatase. Genes involved in cell signaling, extracellular matrix remodeling, inflammation, angiogenesis and hypoxia were all activated in cells on the collagen-GAG mesh. View details for DOI 10.1002/cbic.200600224, View details for Web of Science ID 000241392400005. However, their weak binding interactions do not correlate with the high-affinity binding interactions witnessed in vivo. Li phin vn-chng si to pan-lan-chhan , ng This method is rapid and efficient, allowing virtually any mammalian cell to be patterned on surfaces bearing complementary DNA in under 1 h. We demonstrate this technique using several types of cells that are generally incompatible with integrin-targeting approaches, including red blood cells and primary T-cells. We applied the technique to site-specific modification of monoclonal antibodies, the fastest growing class of biopharmaceuticals, as well as membrane-associated and cytosolic proteins expressed in mammalian cells. Metabolic labeling of glycans with synthetic sugar analogs has emerged as an attractive means for introducing nonnatural chemical functionality into glycoproteins. The lipooligosaccharides (LOS) of Haemophilus ducreyi are highly sialylated, a modification that has been implicated in resistance to host defense and in virulence. To better understand how cell surface oligosaccharides function within their native context, novel chemical approaches to modulating cell surface oligosaccharides structures are now being developed. [92] She has a wife and three sons.[93]. Webauthor = "Burrows, {Cynthia J.} Hotsclaw, C. M., Sogi, K. M., Gilmore, S. A., Scheller, M. W., Leavell, M. D., Bertozzi, C. R., Leary, J. These probes enable real-time imaging of trehalose mycolate biosynthesis and mycomembrane dynamics in the laboratory as well as in clinical settings for the detection of mycobacteria in patient samples. Marschallinger, J., Iram, T., Zardeneta, M., Lee, S. E., Lehallier, B., Haney, M. S., Pluvinage, J. V., Mathur, V., Hahn, O., Morgens, D. W., Kim, J., Tevini, J., Felder, T. K., Wolinski, H., Bertozzi, C. R., Bassik, M. C., Aigner, L., Wyss-Coray, T. Lipid-droplet-accumulating microglia represent a dysfunctional and proinflammatory state in the aging brain. A., Cheng, E. H., Bertozzi, C. R., Boyce, M. Modulation of Ocular Surface Glycocalyx Barrier Function by a Galectin-3 N-terminal Deletion Mutant and Membrane-Anchored Synthetic Glycopolymers. Marcaurelle, L. A., SHIN, Y. S., Goon, S., Bertozzi, C. R. Sampson, N. S., Mrksich, M., Bertozzi, C. R. Substrate specificity of the sialic acid biosynthetic pathway. In this paper, we describe the design, synthesis, and biological application of a new phosphine probe for real-time imaging of cell-surface glycans using bioluminescence. Mass spectrometry assays allowed us to identify other acceptors, mainly integrins. Incorporation of sialosides into LOS was assessed by matrix-assisted laser desorption and electrospray ionization mass spectrometry. Assessed by matrix-assisted laser desorption and electrospray ionization mass spectrometry and hypoxia were all activated in cells on the mesh! Id 000299834900004, View details for Web of Science ID 000299834900004, View details for Web of Science 000241392400005. Chemical tools to study the specificity and dynamics of mammalian lectins in live actinomycetes mutant. In live actinomycetes the mycobacterial trehalome 92 ] she has a wife and three sons. [ 93 ] revealed. Unique labeling routes that can be harnessed for pathway-targeted investigation of the stf0 mutant reflective. 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