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Autophagy
Article
Data sources: UnpayWall
Autophagy
Article . 2009 . Peer-reviewed
Data sources: Crossref
Autophagy
Article . 2009
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NBR1 co-operates with p62 in selective autophagy of ubiquitinated targets

Authors: Vladimir, Kirkin; Trond, Lamark; Terje, Johansen; Ivan, Dikic;

NBR1 co-operates with p62 in selective autophagy of ubiquitinated targets

Abstract

Selective degradation of intracellular targets, such as misfolded proteins and damaged organelles, is an important homeostatic function that autophagy has acquired in addition to its more general role in restoring the nutrient balance during stress and starvation. Although the exact mechanism underlying selection of autophagic substrates is not known, ubiquitination is a candidate signal for autophagic degradation of misfolded and aggregated proteins. p62/SQSTM1 was the first protein shown to bind both target-associated ubiquitin (Ub) and LC3 conjugated to the phagophore membrane, thereby effectively acting as an autophagic receptor for ubiquitinated targets. Importantly, p62 not only mediates selective degradation but also promotes aggregation of ubiquitinated proteins that can be harmful in some cell types. Is p62 the only autophagic receptor for selective autophagy? Looking for proteins that interact with ATG8 family proteins, we identified NBR1 (neighbor of BRCA1 gene 1) as an additional LC3- and Ub-binding protein. NBR1 is degraded by autophagy depending on its LC3-interacting region (LIR) but does not strictly require p62 for this process. Like p62, NBR1 accumulates and aggregates when autophagy is inhibited and is a part of pathological inclusions. We propose that NBR1 together with p62 promotes autophagic degradation of ubiquitinated targets and simultaneously regulates their aggregation when autophagy becomes limited.

Related Organizations
Keywords

Sequestosome-1 Protein, Autophagy, Intracellular Signaling Peptides and Proteins, Ubiquitination, Humans, Proteins, Adaptor Proteins, Signal Transducing, HeLa Cells

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
185
Top 1%
Top 10%
Top 10%
bronze