A novel autophagy-independent, oncosuppressive function of BECN1: Degradation of MCL1

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Updated: Apr 15, 2026

Myeloid Innate Signaling Pathway Regulation by MALT1 Paracaspase Activity
07:09

Myeloid Innate Signaling Pathway Regulation by MALT1 Paracaspase Activity

Published on: January 7, 2019

8.1K

Mohamed Elgendy1, Saverio Minucci

  • 1a Department of Experimental Oncology ; European Institute of Oncology ; IEO ; Milan , Italy.

Autophagy
|April 4, 2015
PubMed

Insights

BECN1 acts as a tumor suppressor by regulating MCL1 protein levels. This inverse relationship, independent of autophagy, impacts tumorigenesis and offers new therapeutic targets.

Area of Science:

  • Molecular Biology
  • Oncology
  • Cellular Biology

Background:

  • Autophagy, regulated by BECN1, was linked to tumor suppression via mouse models.
  • Mechanisms of BECN1's tumor suppression and potential autophagy-independent roles were unclear.

Purpose of the Study:

  • To investigate the novel function of BECN1 in regulating oncogene MCL1 protein levels.
  • To explore the role of BECN1-MCL1 interaction in tumorigenesis, independent of autophagy.

Main Methods:

  • Utilized in vitro and in vivo models, including patient-derived melanoma cells and tissues.
  • Analyzed the inverse-reciprocal regulation between BECN1 and MCL1 protein levels.
  • Investigated the impact of this coregulation on proteasomal degradation.

Main Results:

  • BECN1 and MCL1 exhibit inverse-reciprocal regulation of their protein levels.
  • This regulation mechanism is independent of autophagy and direct physical interaction.
  • The BECN1-MCL1 inverse coregulation significantly influences tumorigenesis in melanoma models.

Conclusions:

  • BECN1 restrains tumorigenesis through autophagy-independent regulation of MCL1.
  • The inverse coregulation between BECN1 and MCL1 is a key mechanism in cancer suppression.
  • This finding provides insights into melanoma development and potential therapeutic strategies.
Keywords:
BECN1MCL1USP9Xmelanomaproteasome

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