8ci4
From Proteopedia
Crystal structure of doubly S-methanethiolated rabbit M-type creatine kinase
Structural highlights
FunctionKCRM_RABIT Reversibly catalyzes the transfer of phosphate between ATP and various phosphogens (e.g. creatine phosphate). Creatine kinase isoenzymes play a central role in energy transduction in tissues with large, fluctuating energy demands, such as skeletal muscle, heart, brain and spermatozoa. Publication Abstract from PubMedIn this work, synthetic cells equipped with an artificial signaling pathway that connects an extracellular trigger event to the activation of intracellular transcription are engineered. Learning from nature, this is done via an engineering of responsive enzymes, such that activation of enzymatic activity can be triggered by an external biochemical stimulus. Reversibly deactivated creatine kinase to achieve triggered production of adenosine triphosphate, and a reversibly deactivated nucleic acid polymerase for on-demand synthesis of RNA are engineered. An extracellular, enzyme-activated production of a diffusible zymogen activator is also designed. The key achievement of this work is that the importance of cellularity is illustrated whereby the separation of biochemical partners is essential to resolve their incompatibility, to enable transcription within the confines of a synthetic cell. The herein designed biochemical pathway and the engineered synthetic cells are arguably primitive compared to their natural counterpart. Nevertheless, the results present a significant step toward the design of synthetic cells with responsive behavior, en route from abiotic to life-like cell mimics. Chemical Zymogens and Transmembrane Activation of Transcription in Synthetic Cells.,Andersen DG, Pedersen AB, Jorgensen MH, Montasell MC, Sogaard AB, Chen G, Schroeder A, Andersen GR, Zelikin AN Adv Mater. 2023 Nov 27:e2309385. doi: 10.1002/adma.202309385. PMID:38009384[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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