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

Honeybadger micropeptide encoded by PVT1 suppresses RAS-MAPK signaling, and its loss enhances MYC-driven tumor progression in MYC+ cancers.

• Why it matters: Understanding how noncoding RNA alterations contribute to cancer can reveal new therapeutic targets, especially since PVT1 is frequently rearranged in MYC-driven tumors.
• What they did: The study identified Honeybadger as a tumor-suppressive micropeptide that binds KRAS, dampening RAS-MAPK signaling, and used molecular analyses to uncover its role in tumor suppression.
• The result: Loss of Honeybadger derepresses RAS-MAPK, stabilizes MYC, and promotes tumor growth, highlighting PVT1’s dual role in activating oncogenic pathways and providing potential intervention points.