The EMBO JournalAug 16, 2024
How can the #ubiquitin #ligase APC/C recognize and inactivate the major kinase, CDK1-Cyclin B1, as soon as the spindle checkpoint is switched off?
Luca Cirillo, Rose Young et al identify chromosome as the key platform, recruiting both Cyclin B1 and APC3 via arginine anchor motifs in their sequences
Jon Pines, Claudio Alfieri and coworkers
https://www.embopress.org/doi/full/10.1038/s44318-024-00194-2
The EMBO JournalJul 6, 2023
#CryoEM shows the human #HECT domain-containing E3 #ligase #UBR5 forms an 𝛂-solenoid scaffold from an antiparallel dimer, and efficiently extends #ubiquitin chains on primed substrates such as #AKIRIN2
@haselbachlab @IMPvienna Nick Brown #UNC_PHCO
#RefereedPreprint ℅ @ReviewCommons
https://www.embopress.org/doi/10.15252/embj.2022113348
The EMBO JournalJun 14, 2023
Extensive multivalent interactions between intrinsically disordered regions in the #BRCA1/#BARD1 #E3 #ligase and #nucleosome substrates facilitate #chromatin recruitment and contribute to histone H2A #ubiquitylation and #DNArepair
Sam Witus, Rachel Klevit, Weixing Zhao et al
https://www.embopress.org/doi/10.15252/embj.2023113565
The EMBO JournalMay 11, 2023

How are specific dysfunctional #mitochondria removed under steady-state conditions?

Julia Pagan and coworkers (University of Queensland) show that an #SCF #ubiquitin #ligase based on #FBXL4, mutated in #MTDPS13, limits basal #mitophagy via #ubiquitination of #NIX and #BNIP3 receptors

https://www.embopress.org/doi/10.15252/embj.2022112767

The EMBO JournalApr 27, 2023

What controls basal, #Parkin-independent #mitophagy?

E3 #ubiquitin #ligase screen by Sylvie Urbé, Michael Clague and coworkers identifies #VHL and #FBXL4 as negative regulators of mitophagy receptors #NIX and #BNIP3 via transcriptional and direct post-translational mechanisms, respectively

https://www.embopress.org/doi/10.15252/embj.2022112799

CellBioNewsApr 24, 2023

Hidden #RNA #repair mechanism discovered in humans.

#ligase #C12orf29 #CRISPR #chemoproteomic

https://phys.org/news/2023-04-hidden-rna-mechanism-humans.html

Hidden RNA repair mechanism discovered in humans

Ribonucleic acids (RNAs) are single-stranded molecules that play an essential role in the cells of all living organisms. As "transcripts" of our genes, mRNAs, for example, are involved in the translation of genetic information by carrying in their own sequence the instructions for the creation of a protein. "In order to fulfill their diverse functions in the cell, RNAs often need to be chemically modified after their creation or repaired after damage," explains Andreas Marx, professor of organic and cellular chemistry at the University of Konstanz.

The EMBO JournalFeb 15, 2023

EMBO Journal Issue 4/23:
- Commentary on #creativity needs in research
- #Degron recognition in orphan complex subunits by CLR4-DCAF12 E3 #ubiquitin #ligase
- #Plasmamembrane topography of #IgM #Bcell receptors
- #YAP roles and regulation in #tumorigenesis
- #Brassinosteroid interplay with #katanin #microtubule severing

Cover by Satarupa Bhaduri, Analine Aguayo, Sonya Neal et al
https://www.embopress.org/toc/14602075/2023/42/4

The EMBO JournalFeb 13, 2023
Viral mimicry of a #DCAF #ubiquitin #ligase adaptor: #CryoEM shows how rodent #cytomegalovirus #CMV E27/M27 hijacks host cell #CRL4 #cullin-RING E3s to degrade #STAT2 and suppress #antiviral #interferon signaling
https://www.embopress.org/doi/10.15252/embj.2022112351
The EMBO JournalFeb 3, 2023
#BRD4-#PRC2 represses #transcription of T-helper 2-specific negative regulators during #Tcell #differentiation:
Brd4 interacts with #Polycomb repressive complex 2 (PRC2) to repress transcriptional expression of T-helper 2 (Th2)-negative regulators #Foxp3 and E3 #ubiqutin #ligase #Fbxw7 during lineage-specific differentiation of #Th2 cells from mouse primary naïve CD4+ T cells
https://www.embopress.org/doi/10.15252/embj.2022111473
The EMBO JournalFeb 2, 2023
Protein complex assembly #qualitycontrol in action:
#cryoEM structures by Nico Thomä at FMI and colleagues show how #CRL4-#DCAF12 #ubiquitin E3 #ligase engages a C-terminal di-Glu #degron in CCT5 recognizable only when this subunit is not incorporated into the #TRiC/#CCT #chaperone complex
https://www.embopress.org/doi/10.15252/embj.2022112253