Journal
ISCIENCE
Volume 26, Issue 6, Pages -Publisher
CELL PRESS
DOI: 10.1016/j.isci.2023.106781
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Ongoing efforts to annotate the genome have revealed a blind spot for small proteins originating from short open reading frames. The discovery of microproteins, which play diverse roles in cellular processes, has ignited the field of microprotein biology. Large-scale efforts are currently underway to identify and characterize sORF-encoded microproteins.
Ongoing efforts to generate a complete and accurate annotation of the genome have revealed a significant blind spot for small proteins (<100 amino acids) originating from short open reading frames (sORFs). The recent discovery of numerous sORF-encoded proteins, termed microproteins, that play diverse roles in critical cellular processes has ignited the field of microprotein biology. Large-scale efforts are currently underway to identify sORF-encoded microproteins in diverse cell-types and tissues and specialized methods and tools have been developed to aid in their discovery, validation, and functional characterization. Microproteins that have been identified thus far play important roles in fundamental processes including ion transport, oxidative phosphorylation, and stress signaling. In this review, we discuss the optimized tools available for microprotein discovery and validation, summarize the biological functions of numerous microproteins, outline the promise for developing microproteins as therapeutic targets, and look forward to the future of the field of microprotein biology.
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