Microprotein

For a similar (if not identical) concept, see Micropeptide.

A microprotein (miP) is a small protein encoded from a small open reading frame (sORF), also known as sORF-encoded protein (SEP). They are a class of protein with a single protein domain. They are related to multidomain proteins. Microproteins regulate larger multidomain proteins at the post-translational level. Microproteins are analogous to microRNAs (miRNAs) and heterodimerize with their targets causing dominant and negative effects. In animals and plants, microproteins influence many biological processes. Because of their dominant effects on their targets, microproteins are currently under study for use in biotechnology.

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