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Room temperature X-ray absorption spectroscopy of metalloenzymes with drop-on-demand sample delivery at XFELs

Bogacz, Isabel (author)
Lawrence Berkeley National Laboratory
Makita, Hiroki (author)
Lawrence Berkeley National Laboratory
Simon, Philipp S. (author)
Lawrence Berkeley National Laboratory
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Zhang, Miao (author)
Lawrence Berkeley National Laboratory
Doyle, Margaret D. (author)
Lawrence Berkeley National Laboratory
Chatterjee, Ruchira (author)
Lawrence Berkeley National Laboratory
Fransson, Thomas (author)
KTH Royal Institute of Technology
Weninger, Clemens (author)
Lund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory
Fuller, Franklin (author)
Stanford Linear Accelerator Center (SLAC)
Gee, Leland (author)
Stanford Linear Accelerator Center (SLAC)
Sato, Takahiro (author)
Stanford Linear Accelerator Center (SLAC)
Seaberg, Matthew (author)
Stanford Linear Accelerator Center (SLAC)
Alonso-Mori, Roberto (author)
Stanford Linear Accelerator Center (SLAC)
Bergmann, Uwe (author)
University of Wisconsin-Madison
Yachandra, Vittal K. (author)
Lawrence Berkeley National Laboratory
Kern, Jan (author)
Lawrence Berkeley National Laboratory
Yano, Junko (author)
Lawrence Berkeley National Laboratory
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 (creator_code:org_t)
2023
2023
English.
In: Pure and Applied Chemistry. - 0033-4545. ; 95:8, s. 891-897
Related links:
http://dx.doi.org/10... (free)
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • X-ray crystallography and X-ray spectroscopy using X-ray free electron lasers plays an important role in understanding the interplay of structural changes in the protein and the chemical changes at the metal active site of metalloenzymes through their catalytic cycles. As a part of such an effort, we report here our recent development of methods for X-ray absorption spectroscopy (XAS) at XFELs to study dilute biological samples, available in limited volumes. Our prime target is Photosystem II (PS II), a multi subunit membrane protein complex, that catalyzes the light-driven water oxidation reaction at the Mn4CaO5 cluster. This is an ideal system to investigate how to control multi-electron/proton chemistry, using the flexibility of metal redox states, in coordination with the protein and the water network. We describe the method that we have developed to collect XAS data using PS II samples with a Mn concentration of <1 mM, using a drop-on-demand sample delivery method.

Subject headings

NATURVETENSKAP  -- Biologi -- Biokemi och molekylärbiologi (hsv//swe)
NATURAL SCIENCES  -- Biological Sciences -- Biochemistry and Molecular Biology (hsv//eng)
NATURVETENSKAP  -- Biologi -- Biofysik (hsv//swe)
NATURAL SCIENCES  -- Biological Sciences -- Biophysics (hsv//eng)

Keyword

Manganese
photoiupac 2022
photosystem II
water oxidation
X-ray absorption spectroscopy
X-ray free electron lasers

Publication and Content Type

art (subject category)
ref (subject category)

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