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000631439 1001_ $$0P:(DE-H253)PIP1081082$$aDe Santis, Emiliano$$b0$$eCorresponding author
000631439 245__ $$aStructural stability of chromophore-grafted Ubiquitin mutants in vacuum
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000631439 520__ $$aStructural biology is witnessing a transformative era with gas-phase techniques such as native mass spectrometry (MS), ion mobility, and single-particle imaging (SPI) emerging as critical tools for studying biomolecular assemblies like protein capsids in their native states. SPI with X-ray free-electron lasers has the potential to allow for capturing atomic-resolution structures of proteins without crystallization. However, determining particle orientation during exposure remains a major challenge, compounded by the heterogeneity of the protein complexes. Gas-phase Förster resonance energy transfer (FRET) offers a promising solution to assess alignment-induced structural perturbations, providing insights into the stability of the tertiary structure under various activation methods. This study employs molecular dynamics (MD) simulations to explore chromophore integration's effect on ubiquitin's structure and alignment properties in vacuum. Ubiquitin serves as an ideal model due to its small size, well-characterized properties, and computational simplicity. By investigating chromophore placement, we identified optimal sites for monitoring gas-phase denaturation and unfolding processes, advancing SPI applications and a broader understanding of protein stability in the gas phase. 
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000631439 7001_ $$aMandl, Thomas$$b1
000631439 7001_ $$aKung, Jocky C. K.$$b2
000631439 7001_ $$aHuynh, Khon$$b3
000631439 7001_ $$aDaly, Steven$$b4
000631439 7001_ $$aD'Alessandro, Lorenza A.$$b5
000631439 7001_ $$aMacAleese, Luke$$b6
000631439 7001_ $$0P:(DE-H253)PIP1014042$$aUetrecht, Charlotte$$b7
000631439 7001_ $$aMarklund, Erik G.$$b8
000631439 7001_ $$0P:(DE-H253)PIP1011740$$aCaleman, Carl$$b9$$eCorresponding author
000631439 773__ $$0PERI:(DE-600)1476244-4$$a10.1039/D5CP01297J$$gp. 10.1039.D5CP01297J$$n28$$p14767 - 14776$$tPhysical chemistry, chemical physics$$v27$$x1463-9076$$y2025
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