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Lahiri D, Agrawal R, Chandravanshi K, Rajput P, Agrawal A, Dwivedi A, Makde RD, Jha SN, Garg N. Assessing the prospect of XAFS experiments of metalloproteins under in vivo conditions at Indus-2 synchrotron facility, India. JOURNAL OF SYNCHROTRON RADIATION 2023; 30:449-456. [PMID: 36891859 PMCID: PMC10000809 DOI: 10.1107/s1600577522011791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 12/10/2022] [Indexed: 06/18/2023]
Abstract
The feasibility of X-ray absorption fine-structure (XAFS) experiments of ultra-dilute metalloproteins under in vivo conditions (T = 300 K, pH = 7) at the BL-9 bending-magnet beamline (Indus-2) is reported, using as an example analogous synthetic Zn (0.1 mM) M1dr solution. The (Zn K-edge) XAFS of M1dr solution was measured with a four-element silicon drift detector. The first-shell fit was tested and found to be robust against statistical noise, generating reliable nearest-neighbor bond results. The results are found to be invariant between physiological and non-physiological conditions, which confirms the robust coordination chemistry of Zn with important biological implications. The scope of improving spectral quality for accommodation of higher-shell analysis is addressed.
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Affiliation(s)
- Debdutta Lahiri
- High Pressure and Synchrotron Radiation Physics, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Richa Agrawal
- Department of Biochemistry and Molecular Biology, University of Chicago, 929 E 57th Street, Chicago, IL 60637, USA
| | | | - Parasmani Rajput
- Beamline Development and Application Section, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Ankur Agrawal
- Beamline Development and Application Section, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Ashutosh Dwivedi
- Beamline Development and Application Section, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Ravindra D. Makde
- Beamline Development and Application Section, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - S. N. Jha
- Beamline Development and Application Section, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Nandini Garg
- High Pressure and Synchrotron Radiation Physics, Bhabha Atomic Research Centre, Mumbai 400085, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
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Rajbongshi J, Das DK, Mazumdar S. Spectroscopic and electrochemical studies of the pH-Induced transition in the CuA centre from Thermus thermophilus. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2021.120749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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