Circular mRNA can be utilized to produce long proteins
Recent scientific literature confirms that circular RNAs can be translated into proteins and peptides through various cap-independent mechanisms.
The retrieved papers consistently state that circular RNAs (circRNAs), despite previously being considered non-coding, can be translated into proteins or peptides via mechanisms like IRES or m6A modifications, directly supporting the claim.
Xu Y, Yang L, Tang Y, Wang Y, Wang H. riboCIRC v2.0: an expanded resource for translatable CircRNAs.. 2026. https://doi.org/10.1093/nar/gkaf1022
This database resource documents thousands of translatable circRNAs and their encoded finite ORF-encoded peptides.
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Wu N, Amalraj J, Yang BB. Circular RNA as emerging precision therapeutics: from RNA regulation to peptide translation.. 2026. https://doi.org/10.1093/pcmedi/pbag011
This review highlights that a subset of circular RNAs can be translated to produce bioactive peptides or proteins.
Wu X, Ye X, Chen H, Li T, Ge J, Guo J. The translational roles of circular RNAs in cancers and their underlying molecular mechanisms.. 2026. https://doi.org/10.1007/s12032-026-03306-6
This review details how circular RNAs are translated into proteins or peptides through mechanisms such as IRES and m6A elements.
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