Reaction of the complex [(TPA)Zn(H2O)]2+ [TPA = tris(2-pyridylmethyl)amine] with hydrogen sulfide in aqueous buffered solution gives the corresponding monomeric hydrogensulfido complex [(TPA)Zn(SH)]+, which was fully characterized, including by XRD. This complex is stable at neutral pH, but decomposes under basic conditions to yield the free ligand and zinc sulfide, and under acidic conditions to give
Esterase-Activated Perthiocarbonate Persulfide Donors Provide Insights into Persulfide Persistence and Stability
作者:Kaylin G. Fosnacht、Matthew M. Cerda、Emma J. Mullen、Hannah C. Pigg、Michael D. Pluth
DOI:10.1021/acschembio.1c00805
日期:2022.2.18
situ. Here, we report the synthesis of esterase-activated perthiocarbonate persulfide donors and investigate the effects of structural modifications on persulfide release. Although stericbulk of the ester did not significantly alter persulfide release kinetics, increased stericbulk of the thiol increased the persulfide release rate. In addition, we found that the stericbulk and identity of the thiol
Thio-derived disulfides as potent inhibitors of botulinum neurotoxin type B: implications for zinc interaction
作者:Christine Anne、Armand Blommaert、Serge Turcaud、Anne-Sophie Martin、Hervé Meudal、Bernard P Roques
DOI:10.1016/s0968-0896(03)00450-4
日期:2003.10
Botulinumneurotoxin type B causes the inhibition of acetylcholine release at the neuromuscular junction resulting in a flaccid paralysis designated botulism. This occurs through the cleavage of synaptobrevin, an intracellular critical component of neurotransmitter exocytosis, by the zinc-metallopeptidase activity of the smallest subunit of the toxin. Blocking the proteolytic activity may present an