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Full-Text Articles in Pharmacy and Pharmaceutical Sciences
An Arginine Finger Regulates The Sequential Action Of Asymmetrical Hexameric Atpase In The Double-Stranded Dna Translocation Motor, Zhengyi Zhao, Gian Marco De-Donatis, Chad T. Schwartz, Huaming Fang, Jingyuan Li, Peixuan Guo
An Arginine Finger Regulates The Sequential Action Of Asymmetrical Hexameric Atpase In The Double-Stranded Dna Translocation Motor, Zhengyi Zhao, Gian Marco De-Donatis, Chad T. Schwartz, Huaming Fang, Jingyuan Li, Peixuan Guo
Pharmaceutical Sciences Faculty Publications
Biological motors are ubiquitous in living systems. Currently, how the motor components coordinate the unidirectional motion is elusive in most cases. Here, we report that the sequential action of the ATPase ring in the DNA packaging motor of bacteriophage ϕ29 is regulated by an arginine finger that extends from one ATPase subunit to the adjacent unit to promote noncovalent dimer formation. Mutation of the arginine finger resulted in the interruption of ATPase oligomerization, ATP binding/hydrolysis, and DNA translocation. Dimer formation reappeared when arginine mutants were mixed with other ATPase subunits that can offer the arginine to promote their interaction. Ultracentrifugation …
Psmb9 Codon 60 Polymorphisms Have No Impact On The Activity Of The Immunoproteasome Catalytic Subunit B1i Expressed In Multiple Types Of Solid Cancer, Ji Eun Park, Lin Ao, Zachary Miller, Kyungbo Kim, Ying Wu, Eun Ryoung Jang, Eun Young Lee, Kyung Bo Kim, Wooin Lee
Psmb9 Codon 60 Polymorphisms Have No Impact On The Activity Of The Immunoproteasome Catalytic Subunit B1i Expressed In Multiple Types Of Solid Cancer, Ji Eun Park, Lin Ao, Zachary Miller, Kyungbo Kim, Ying Wu, Eun Ryoung Jang, Eun Young Lee, Kyung Bo Kim, Wooin Lee
Pharmaceutical Sciences Faculty Publications
The proteasome is a key regulator of cellular protein homeostasis and is a clinically validated anticancer target. The immunoproteasome, a subtype of proteasome expressed mainly in hematopoietic cells, was initially recognized for its role in antigen presentation during the immune response. Recently, the immunoproteasome has been implicated in several disease conditions including cancer and autoimmune disorders, but many of the factors contributing to these pathological processes remain unknown. In particular, the codon 60 polymorphism of the PSMB9 gene encoding the β1i immunoproteasome catalytic subunit has been investigated in the context of a variety of diseases. Despite this, previous studies have …