Proteasome condensate formation is driven by multivalent interactions with shuttle factors and ubiquitin chains

KA Waite, G Vontz, SY Lee… - Proceedings of the …, 2024 - National Acad Sciences
Stress conditions can cause the relocalization of proteasomes to condensates in yeast and
mammalian cells. The interactions that facilitate the formation of proteasome condensates …

Short disordered termini and proline-rich domain are major regulators of UBQLN1/2/4 phase separation

TP Dao, A Rajendran, SKK Galagedera, W Haws… - Biophysical …, 2024 - cell.com
Highly homologous ubiquitin-binding shuttle proteins UBQLN1, UBQLN2, and UBQLN4
differ in both their specific protein quality control functions and their propensities to localize …

Challenges in bridging the gap between protein structure prediction and functional interpretation

M Varadi, M Tsenkov, S Velankar - Proteins: Structure, Function …, 2023 - Wiley Online Library
The rapid evolution of protein structure prediction tools has significantly broadened access
to protein structural data. Although predicted structure models have the potential to …

High-throughput assay exploiting disorder-to-order conformational switches: application to the proteasomal Rpn10: E6AP complex

CS Muli, SG Tarasov, KJ Walters - Chemical science, 2024 - pubs.rsc.org
Conformational switching is pervasively driven by protein interactions, particularly for
intrinsically disordered binding partners. We developed a dually orthogonal fluorescence …

[HTML][HTML] Phase separation of polyubiquitinated proteins in UBQLN2 condensates controls substrate fate

IM Valentino, JG Llivicota-Guaman, TP Dao, EO Mulvey… - bioRxiv, 2024 - ncbi.nlm.nih.gov
Ubiquitination is one of the most common post-translational modifications in eukaryotic cells.
Depending on the architecture of polyubiquitin chains, substrate proteins can meet different …

[HTML][HTML] Short N-terminal disordered regions and the proline-rich domain are major regulators of phase transitions for full-length UBQLN1, UBQLN2 and UBQLN4

TP Dao, A Rajendran, SKK Galagedera, W Haws… - bioRxiv, 2023 - ncbi.nlm.nih.gov
Highly homologous ubiquitin-binding shuttle proteins UBQLN1, UBQLN2 and UBQLN4 differ
in both their specific protein quality control functions and their propensities to localize to …

The structural and biophysical basis of substrate binding to the hydrophobic groove in Ubiquilin Sti1 domains

J Onwunma, S Binsabaan, SP Allen, B Sankaran… - bioRxiv, 2024 - biorxiv.org
Ubiquilins are a family of cytosolic proteins that ferry ubiquitinated substrates to the
proteasome for degradation. Recent work has demonstrated that Ubiquilins can also act as …

E3 ligase recruitment by UBQLN2 protects substrates from proteasomal degradation

A Scheutzow, S Thanthirige, G Siffer, ML Wohlever - bioRxiv, 2024 - biorxiv.org
Ubiquilins are a family of proteins critical to cellular proteostasis that are also linked to
neurodegenerative diseases such as ALS, with specific mutations in UBQLN2 causing …

[HTML][HTML] We con-dense if we want to; We can't leave AZUL outside

TP Dao, CA Castañeda - Structure, 2023 - Elsevier
In this issue of Structure, Buel et al.(2023) combined NMR data with AlphaFold2 to map out
the interaction between the AZUL domain of ubiquitin ligase E6AP and UBQLN1/2 UBA. The …

1H, 15N, 13C backbone and Cβ resonance assignments for UBQLN1 UBA and UBAA domains

GR Buel, X Chen, O Kayode, A Cruz… - Biomolecular NMR …, 2023 - Springer
UBQLN1 functions in autophagy and proteasome-mediated protein degradation. It contains
an N-terminal ubiquitin-like domain (UBL), a C-terminal ubiquitin-associated domain (UBA) …