Efficient N-Terminal Labeling of Proteins by Use of Sortase
作者:Daniel J. Williamson、Martin A. Fascione、Michael E. Webb、W. Bruce Turnbull
DOI:10.1002/anie.201204538
日期:2012.9.10
“Sorting out” N‐terminal labeling: The reversibility of transpeptidase reactions makes protein N‐terminal labeling challenging. Depsipeptide substrates for sortase A release alcohol by‐products, which are poor nucleophiles for the reverse reaction, during ligation. Proteins with an unhindered N‐terminal glycine residue can be labeledefficiently with only a minimal excess of the labeling reagent (see scheme)
“整理” N 端标记:转肽酶反应的可逆性使蛋白质 N 端标记具有挑战性。分选酶 A 的缩肽底物在连接过程中释放醇副产物,这些副产物是逆反应的不良亲核试剂。具有不受阻碍的 N 末端甘氨酸残基的蛋白质只需少量过量的标记试剂即可有效标记(见方案)。
Site‐Specific 5‐Formyl Cytosine Mediated DNA‐Histone Cross‐Links: Synthesis and Polymerase Bypass by Human DNA Polymerase η
作者:Suresh S. Pujari、Mingxuan Wu、Jenna Thomforde、Zhipeng A. Wang、Christopher Chao、Noelle M. Olson、Luke Erber、William C. K. Pomerantz、Philip Cole、Natalia Y. Tretyakova
DOI:10.1002/anie.202109418
日期:2021.12.13
DNA–histone cross-links (DPCs) have been synthesized efficiently via oxime ligation. These DPC lesions block DNA replication but the replication block can be removed via proteolytic processing.
DNA-组蛋白交联 (DPC) 已通过肟连接有效合成。这些 DPC 病变会阻止 DNA 复制,但可以通过蛋白水解处理去除复制块。