modification method using a catalytic acyltransferreaction. However, because of the high electrophilicity of the thioester acyl donor molecule, AGD chemistry suffers from nonspecific reactions to proteins other than the target protein in crude biological environments, such as cell lysates, live cells, and tissue samples. To overcome this shortcoming, we here report a new acyl donor/organocatalyst system that
Hydroxamic Acid‐Piperidine Conjugate is an Activated Catalyst for Lysine Acetylation under Physiological Conditions
作者:Shinsuke Mizumoto、Siqi Xi、Yusuke Fujiwara、Shigehiro A. Kawashima、Kenzo Yamatsugu、Motomu Kanai
DOI:10.1002/asia.201901737
日期:2020.3.16
motif furnishing higher acylation activity would further broaden the possible applications of chemical lysine acylation. We herein report that the hydroxamic acid-piperidine conjugate Ph-HXA is a more active catalytic motif for lysine acetylation than DMAP under physiological conditions. In contrast to DMAP, the hydroxamic acid moiety is mostly deprotonated under aqueous neutral pH, resulting in a higher
localized on cellmembranes play key roles in many biological events. Because the dynamic behaviors of receptors are deeply involved in cytokine- and growth-factor-dependent signaling pathways, reliable techniques for real-time imaging of receptors in live cells are strongly desired. Here, we describe a method of covalently labeling and imaging membrane receptors in live cells by using chemically reactive
Anthraquinone–lectinhybrids were effectively synthesized using water‐soluble anthraquinone derivative 11 with concanavalin A (ConA) and hygrophorus russula lectin (HRL) to give anthraquinone–ConA (16) and anthraquinone–HRL (17) hybrids, respectively. These anthraquinone–lectinhybrids effectively and selectively degradedoligosaccharides containing a mannose residue as a non‐reducing terminal sugar
that are able to selectivelylabel glycoproteins. Congerin II, an animal galectin, and wheat germ agglutinin are conjugated with 4-dimethylaminopyridine (DMAP), a well-known acyl transfer catalyst by our affinity-guided DMAP method and Cu(I)-assisted click chemistry. Selectivelabeling of glycoproteins is facilitated by the DMAP-tethered lectin catalysts both in vitro and on livingcells. Two-dimensional