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- W4313404808 abstract "Abstract Toll-like and Interleukin-1/18 receptor (TIR) resistance proteins have been identified across biology to function as important multimodal signal transduction and immune regulatory molecules. Select TIR domain containing proteins identified in both eukaryotic and prokaryotic species have also been found to have NAD+ hydrolase activity in bacteria, plants and in mammalian cells. We report the crystal structure of the Acinetobacter baumannii Toll-Interleukin-1 receptor resistance domain protein (AbTIR) determined to a resolution of 2.8 Å, confirm its enzymatic function in NAD+ hydrolysis and map its interaction with NAD+ using HDX-MS. Additionally, we have developed a novel assay for measuring AbTIR’s enzymatic activity in live bacteria using label-free quantitative two-photon fluorescence lifetime (FLT) imaging microscopy (2p-FLIM). These studies provide new insight into TIR protein mechanisms and their varying roles across biology. Supported by R01 AI-082299, R21 CA191726-01" @default.
- W4313404808 created "2023-01-06" @default.
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- W4313404808 date "2022-05-01" @default.
- W4313404808 modified "2023-10-16" @default.
- W4313404808 title "Structure of NAD+ consuming <i>Acinetobacter baumannii</i> TIR domain." @default.
- W4313404808 doi "https://doi.org/10.4049/jimmunol.208.supp.58.24" @default.
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