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Structural Requirements for Activity of Mind bomb1 in Notch Signaling
Ruili Cao1, Oren Gozlan2, Lena Tveriakhina1
1Department of Biological Chemistry and Molecular Pharmacology, Blavatnik Institute, Harvard Medical School, Boston, MA 02115, USA.
Biorxiv : the Preprint Server for Biology
|March 11, 2024
Summary
Mind bomb 1 (MIB1) is an E3 ligase crucial for Notch signaling. Researchers identified the RING3 domain as essential for MIB1
Area of Science:
- Biochemistry
- Molecular Biology
- Cell Signaling
Background:
- Mind bomb 1 (MIB1) is a RING E3 ligase essential for Notch signaling.
- MIB1 ubiquitinates Notch ligands, a key step in Notch pathway activation.
- The precise mechanism of ubiquitin transfer by MIB1's domains remains incompletely understood.
Conclusions:
- The RING3 domain is the catalytic core of MIB1 for ubiquitin transfer.
- MIB1 dimerization, driven by ccRING3, is critical for its ligase activity.
- A minimal MIB1 construct can effectively induce Notch signaling, defining key functional elements.
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