start-ver=1.4 cd-journal=joma no-vol=1864 cd-vols= no-issue=2 article-no= start-page=129466 end-page= dt-received= dt-revised= dt-accepted= dt-pub-year=2020 dt-pub=20200229 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Time-resolved studies of metalloproteins using X-ray free electron laser radiation at SACLA en-subtitle= kn-subtitle= en-abstract= kn-abstract=Background: The invention of the X-ray free-electron laser (XFEL) has provided unprecedented new opportunities for structural biology. The advantage of XFEL is an intense pulse of X-rays and a very short pulse duration (<10 fs) promising a damage-free and time-resolved crystallography approach.
Scope of review: Recent time-resolved crystallographic analyses in XFEL facility SACLA are reviewed. Specifically, metalloproteins involved in the essential reactions of bioenergy conversion including photosystem II, cytochrome c oxidase and nitric oxide reductase are described.
Major conclusions: XFEL with pump-probe techniques successfully visualized the process of the reaction and the dynamics of a protein. Since the active center of metalloproteins is very sensitive to the X-ray radiation, damage-free structures obtained by XFEL are essential to draw mechanistic conclusions. Methods and tools for sample delivery and reaction initiation are key for successful measurement of the time-resolved data.
General significance: XFEL is at the center of approaches to gain insight into complex mechanism of structural dynamics and the reactions catalyzed by biological macromolecules. Further development has been carried out to expand the application of time-resolved X-ray crystallography. This article is part of a Special Issue entitled Novel measurement techniques for visualizing 'live' protein molecules. en-copyright= kn-copyright= en-aut-name=SugaMichihiro en-aut-sei=Suga en-aut-mei=Michihiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=ShimadaAtsuhiro en-aut-sei=Shimada en-aut-mei=Atsuhiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=AkitaFusamichi en-aut-sei=Akita en-aut-mei=Fusamichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=ShenJian-Ren en-aut-sei=Shen en-aut-mei=Jian-Ren kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=ToshaTakehiko en-aut-sei=Tosha en-aut-mei=Takehiko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=SugimotoHiroshi en-aut-sei=Sugimoto en-aut-mei=Hiroshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= affil-num=1 en-affil=Research Institute for Interdisciplinary Science and Graduate School of Natural Science and Technology, Okayama University kn-affil= affil-num=2 en-affil=Graduate School of Applied Biological Sciences and Faculty of Applied Biological Sciences, Gifu University kn-affil= affil-num=3 en-affil=Research Institute for Interdisciplinary Science and Graduate School of Natural Science and Technology, Okayama University kn-affil= affil-num=4 en-affil=Research Institute for Interdisciplinary Science and Graduate School of Natural Science and Technology, Okayama University kn-affil= affil-num=5 en-affil=Synchrotron Radiation Life Science Instrumentation Team, RIKEN SPring-8 Center kn-affil= affil-num=6 en-affil=Synchrotron Radiation Life Science Instrumentation Team, RIKEN SPring-8 Center kn-affil= en-keyword=Heme kn-keyword=Heme en-keyword=Metalloproteins kn-keyword=Metalloproteins en-keyword=Proton pump kn-keyword=Proton pump en-keyword=Radiation damage kn-keyword=Radiation damage en-keyword=Serial femtosecond crystallography kn-keyword=Serial femtosecond crystallography en-keyword=X-ray free-electron laser kn-keyword=X-ray free-electron laser END