[EN] CHARGE VARIANT LINKERS<br/>[FR] LIEURS DE VARIANTS DE CHARGE
申请人:SEAGEN INC
公开号:WO2021207701A1
公开(公告)日:2021-10-14
The present disclosure provides, inter alia, ADCs with charge variant chemical linkers useful in treating various diseases such as cancer and autoimmune disorders.
A Potent, Versatile Disulfide-Reducing Agent from Aspartic Acid
作者:John C. Lukesh、Michael J. Palte、Ronald T. Raines
DOI:10.1021/ja211931f
日期:2012.3.7
Dithiothreitol (DTT) is the standard reagent for reducing disulfide bonds between and within biological molecules. At neutral pH, however, >99% of DTT thiol groups are protonated and thus unreactive. Herein, we report on (2S)-2-amino-1,4-dimercaptobutane (dithiobutylamine or DTBA), a dithiol that can be synthesized from L-aspartic acid in a few high-yielding steps that are amenable to a large-scale process. DTBA has thiol pK(a) values that are similar to 1 unit lower than those of DTT and forms a disulfide with a similar E degrees' value. DTBA reduces disulfide bonds in both small molecules and proteins faster than does DTT. The amino group of DTBA enables its isolation by cation-exchange and facilitates its conjugation. These attributes indicate that DTBA is a superior reagent for reducing disulfide bonds in aqueous solution.