Results 151 to 160 of about 426,171 (247)

ER proteostasis meets mitochondrial function: contact sites as hubs of communication and therapeutic targets

: Proteostasis maintains the balance between protein synthesis, folding, and degradation within the endoplasmic reticulum (ER). This quality-control system ensures that proteins undergo proper post-translational modifications-such as PDI-ERO1-mediated ...
Cherubini, Alessandro, Renna, Giorgia Maria, Varone, Ersilia, Germani, Serena, Marrazza, Alice, Zito, Ester   +5 more
core   +1 more source

Functional and transcriptomic analyses in Neurospora crassa reveal a crucial role for the N‐glycoprotein deglycosylation process in fungal homeostasis

The FEBS Journal, EarlyView.
In Neurospora crassa, a cytosolic GH18 endo‐β‐n‐acetylglucosaminidase (ENGase) functions as an active deglycosylating enzyme. Deletion of this severely alters tolerance to multiple stress conditions and causes extensive transcriptomic reprogramming, including upregulation of a GH20 exo‐β‐n‐acetylhexosaminidase under ER stress, indicating that N. crassa
Anastasios Samaras, Tanim Jabid Hossain, Magnus Karlsson, Georgios Tzelepis   +3 more
wiley   +1 more source

Tankyrase‐2 regulates adipocyte differentiation through AMPK/mTOR signaling

The FEBS Journal, EarlyView.
Tankyrase 2 (TNKS2), a PARP family member, underpins adipocyte differentiation. TNKS2 controls LKB1 protein level, and consequently, the activity of the mTOR/AMPK system and adipocyte differentiation through a layered process. Pharmacological inhibition of TNKS2 leaves other PARPs and DNA repair active and therefore represents a novel target in ...
Boglarka Rauch, Gyula Ujlaki, Szilard Poliska, Nakayi Murahwa, Patrik Kovacs, Aladar Pettko‐Szandtner, Karen Uray, Peter Bai   +7 more
wiley   +1 more source

Structures of the UBR4 complex reveal a giant arena to capture diverse substrates for ubiquitin chain elongation

The FEBS Journal, EarlyView.
This review summarizes recent structures of the UBR4 complex, a giant E4 ubiquitin ligase which recognizes proteins with pre‐existing ubiquitin modifications and marks them for degradation. The UBR4 complex uses a large arena lined with substrate interaction modules to select features on ubiquitinated substrates, such as the presence of N‐degrons or ...
Daniel B. Grabarczyk, Tim Clausen
wiley   +1 more source

Erratum: Nicotinamide Riboside Enhances Mitochondrial Proteostasis and Adult Neurogenesis through Activation of Mitochondrial Unfolded Protein Response Signaling in the Brain of ALS SOD1^G93A Mice: Erratum. [PDF]

Int J Biol Sci, 2022
Zhou Q, Zhu L, Qiu W, Liu Y, Yang F, Chen W, Xu R.   +6 more
europepmc   +1 more source

Newly identified human aminoacyl‐tRNA synthetase complex interacting multifunctional protein 2 (AIMP2) loss‐of‐function mutations cause neurodevelopmental defects linked to cell death in a zebrafish model

The FEBS Journal, EarlyView.
Human AIMP2 mutations lead to severe neurodevelopmental defects and brain atrophy. Using patient‐derived fibroblasts from two individuals, we show decreased AIMP2 protein levels and overall protein synthesis. In a zebrafish loss‐of‐function model, the lack of AIMP2 leads to an increase in cell death and results in smaller brains.
Patrick Mullen, Shenela Lakhani, Joshua Appelbaum, DéJenaé See, Pryce Patterson, Collin M. MacLeod, Alexandra George, Reza Maroofian, Margaret E. Ross, Christopher Francklyn, Alicia M. Ebert   +10 more
wiley   +1 more source

Selective autophagy pathways in ageing and neurodegeneration: Emerging roles for mitophagy and nucleophagy

The FEBS Journal, EarlyView.
As we age, cells gradually accumulate damage, which can contribute to disease and neurodegeneration. This review explores how two cellular recycling processes, mitophagy and nucleophagy, remove damaged mitochondria and nuclear material, respectively, to maintain cell health and long‐term neuronal homeostasis.
Maria Markaki, Nektarios Tavernarakis
wiley   +1 more source

The transport of protein aggregates to the vacuole suggests a role for lipid droplets in waste disposal in Saccharomyces cerevisiae

The FEBS Journal, EarlyView.
Lipid droplets (LD) act as cellular ‘garbage trucks’ that transport cytosolic protein aggregates to the vacuole for degradation in yeast. Protein aggregates are docked to lipid droplets in a triacylglycerol‐dependent manner, transported through the cytoplasm, and transferred to the insoluble protein deposit (IPOD) at the vacuole.
Christoph Reiter, Patrick Ebner, Elli Leona Kronsteiner, Sophia Moustakakis, Markus Wiederstein, Astrid Obermayer, Ronald Thomas Huber, Christian Schloegelhofer, Florian Wieser, Jon Cedrick Richter, Isabelle Guirsch, Patrick Rockenfeller, Jana Vojtová, Tomáš Groušl, Thomas Klaus Felder, Mark Rinnerthaler   +15 more
wiley   +1 more source

Proteostasis in the regulation of pancreatic islet cell plasticity

Journal of Diabetes Investigation, EarlyView.
Adaptive proteostasis integrates protein synthesis, folding, trafficking, and degradation through ISR, UPR, ER stress responses, autophagy, and proteasomal degradation. In pancreatic islet cells, this coordinated network preserves protein quality, secretory function, proliferation, and survival, enabling adaptation to metabolic stress and aging while ...
Jun Shirakawa
wiley   +1 more source

A selective inhibitor reveals roles for LONP1 in mitochondrial proteostasis and OXPHOS dependencies. [PDF]

Life Sci Alliance
Szilagyi Z, Michon P, Pardo-Hernández C, Sãcultanu M, Miralles Fusté J, Griffin AM, Charifson PS, Phan C, Shi Y, Kern G, Martinez Botella G, Keating TA, Macao B, Larsson NG, Falkenberg M, Green J, Gustafsson CM.   +16 more
europepmc   +1 more source