Honeybadger, a micropeptide encoded by an alternative PVT1 transcript, is a critical negative regulator of RAS-MAPK signaling in MYC-driven tumors.

Honeybadger, a micropeptide encoded by the 3'- PVT1 segment, binds KRAS and inhibits RAS-MAPK signaling in MYC-driven tumors.

• Why it matters: Understanding how long noncoding RNA alterations contribute to cancer can reveal new therapeutic targets, especially in MYC-driven malignancies where prognosis is often poor.
• What they did: The study identified Honeybadger (HNB), a tumor-suppressive micropeptide encoded by the 3'- PVT1 region, which interacts with KRAS and suppresses RAS-MAPK signaling, with its loss leading to pathway activation and MYC stabilization.
• The result: Loss of HNB derepresses RAS-MAPK signaling and stabilizes MYC via Ser 62 phosphorylation, providing a mechanistic basis for the aggressive nature of PVT1-rearranged cancers and highlighting PVT1 as a key regulatory hub.