Spatially confined protein assembly in hierarchical mesoporous metal-organic framework

Xiaoliang Wang, Lilin He (), Jacob Sumner, Shuo Qian, Qiu Zhang, Hugh O’Neill, Yimin Mao, Chengxia Chen, Abdullah M. Al-Enizi, Ayman Nafady and Shengqian Ma ()
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Xiaoliang Wang: University of North Texas
Lilin He: Oak Ridge National Laboratory
Jacob Sumner: Oak Ridge National Laboratory
Shuo Qian: Oak Ridge National Laboratory
Qiu Zhang: Oak Ridge National Laboratory
Hugh O’Neill: Oak Ridge National Laboratory
Yimin Mao: National Institute of Standards and Technology
Chengxia Chen: University of North Texas
Abdullah M. Al-Enizi: King Saud University
Ayman Nafady: King Saud University
Shengqian Ma: University of North Texas

Nature Communications, 2023, vol. 14, issue 1, 1-8

Abstract: Abstract Immobilization of biomolecules into porous materials could lead to significantly enhanced performance in terms of stability towards harsh reaction conditions and easier separation for their reuse. Metal-Organic Frameworks (MOFs), offering unique structural features, have emerged as a promising platform for immobilizing large biomolecules. Although many indirect methods have been used to investigate the immobilized biomolecules for diverse applications, understanding their spatial arrangement in the pores of MOFs is still preliminary due to the difficulties in directly monitoring their conformations. To gain insights into the spatial arrangement of biomolecules within the nanopores. We used in situ small-angle neutron scattering (SANS) to probe deuterated green fluorescent protein (d-GFP) entrapped in a mesoporous MOF. Our work revealed that GFP molecules are spatially arranged in adjacent nanosized cavities of MOF-919 to form “assembly” through adsorbate-adsorbate interactions across pore apertures. Our findings, therefore, lay a crucial foundation for the identification of proteins structural basics under confinement environment of MOFs.

Date: 2023
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DOI: 10.1038/s41467-023-36533-w

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