Abstract
Ubiquitin functions by covalently modifying other proteins. In the past few years, a surprising number of other proteins have been identified that, despite often being only slightly similar to ubiquitin, can also be attached to proteins. Newly discovered parallels between the activation of ubiquitin and the biosynthesis of certain enzyme cofactors now hint at the possible evolutionary origins of the ubiquitin system.
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Acknowledgements
I wish to thank J. Laney, S-J. Li, C. Pickart and R. Swanson for helpful discussion and comments on the manuscript. The work of my laboratory is supported by grants from the NIH.
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Hochstrasser, M. Evolution and function of ubiquitin-like protein-conjugation systems . Nat Cell Biol 2, E153–E157 (2000). https://doi.org/10.1038/35019643
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DOI: https://doi.org/10.1038/35019643
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