Mutations in LZTR1 drive human disease by dysregulating RAS ubiquitination

M. Steklov, S. Pandolf, M. F. Baietti, A. Batiuk, P. Carai, P. Najm, M. Zhang, H. Jang, F. Renzi, Y. Cai, L. Abbasi Asbagh, T. Pastor, M. De Troyer, M. Simicek, E. Radaelli, H. Brems, E. Legius, J. Tavernier, K. Gevaert, F. ImpensL. Messiaen, R. Nussinov, S. Heymans, S. Eyekerman, A. A. Sablina*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

89 Citations (Web of Science)

Abstract

The leucine zipper-like transcriptional regulator 1 (LZTR1) protein, an adaptor for cullin 3 (CUL3) ubiquitin ligase complex, is implicated in human disease, yet its mechanism of action remains unknown. We found that Lztrl haploinsufficiency in mice recapitulates Noonan syndrome phenotypes, whereas LZTR1 loss in Schwann cells drives dedifferentiation and proliferation. By trapping LZTR1 complexes from intact mammalian cells, we identified the guanosine triphosphatase RAS as a substrate for the LZTR1-CUL3 complex. Ubiquitome analysis showed that loss of Lztrl abrogated Ras ubiquitination at lysine-170. LZTR-mediated ubiquitination inhibited RAS signaling by attenuating its association with the membrane. Disease-associated LZTR1 mutations disrupted either LZTR1-CUL3 complex formation or its interaction with RAS proteins. RAS regulation by LZTR1-mediated ubiquitination provides an explanation for the role of LZTR1 in human disease.

Original languageEnglish
Pages (from-to)1177-1182
Number of pages6
JournalScience
Volume362
Issue number6419
DOIs
Publication statusPublished - 7 Dec 2018

Keywords

  • FAST INTERACTION REFINEMENT
  • RARE VARIANTS
  • MEMBRANE
  • FIREDOCK
  • REVEALS
  • CHARMM

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