期刊
CELL COMMUNICATION AND SIGNALING
卷 18, 期 1, 页码 -出版社
BMC
DOI: 10.1186/s12964-020-00670-2
关键词
Tardigrade; Intrinsically disordered proteins; Tardigrade disordered protein; Cytoplasmic abundant heat soluble protein; Secreted abundant heat soluble protein; Mitochondrial abundant heat soluble protein; Late embryogenesis abundant protein; Anhydrobiosis; Vitrification; Stress tolerance
类别
资金
- Institutional Development Award (IDeA) from the National Institute of General Medical Sciences of the National Institutes of Health [2P20GM103432]
- DARPA [W911NF-19-2-0019]
- NASA [NNX15AB44G]
- NASA [NNX15AB44G, 808401] Funding Source: Federal RePORTER
Disordered proteins have long been known to help mediate tolerance to different abiotic stresses including freezing, osmotic stress, high temperatures, and desiccation in a diverse set of organisms. Recently, three novel families of intrinsically disordered proteins were identified in tardigrades, microscopic animals capable of surviving a battery of environmental extremes. These three families include the Cytoplasmic-, Secreted-, and Mitochondrial- Abundant Heat Soluble (CAHS, SAHS, and MAHS) proteins, which are collectively termed Tardigrade Disordered Proteins (TDPs). At the level of sequence conservation TDPs are unique to tardigrades, and beyond their high degree of disorder the CAHS, SAHS, and MAHS families do not resemble one another. All three families are either highly expressed constitutively, or significantly enriched in response to desiccation. In vivo, ex vivo, and in vitro experiments indicate functional roles for members of each TDP family in mitigating cellular perturbations induced by various abiotic stresses. What is currently lacking is a comprehensive and holistic understanding of the fundamental mechanisms by which TDPs function, and the properties of TDPs that allow them to function via those mechanisms. A quantitative and systematic approach is needed to identify precisely what cellular damage TDPs work to prevent, what sequence features are important for these functions, and how those sequence features contribute to the underlying mechanisms of protection. Such an approach will inform us not only about these fascinating proteins, but will also provide insights into how the sequence of a disordered protein can dictate its functional, structural, and dynamic properties.
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