Equivalencies: 0 | Classes: 3 | Children: 0 | Explore

Appears in Networks 13

In-Edges 41

path(MESH:"Neurodegenerative Diseases") association p(HGNC:STUB1) View Subject | View Object

Several E3 Ub ligases, such as CHIP, Parkin, RNF182, may have roles in AD and other neurodegenerative diseases (Shimura et al., 2004; Khandelwal et al., 2011; Lei et al., 2012). PubMed:23528736

p(FPLX:HSP90) increases act(p(HGNC:STUB1)) View Subject | View Object

Alternatively, either Hsp70 or Hsp90 can recruit the ubiquitin E3 ligase, C-terminal Hsp70 interacting protein (CHIP), to degrade the bound substrate [104] PubMed:21882945

p(INTERPRO:"Heat shock protein 70 family") increases act(p(HGNC:STUB1)) View Subject | View Object

Alternatively, either Hsp70 or Hsp90 can recruit the ubiquitin E3 ligase, C-terminal Hsp70 interacting protein (CHIP), to degrade the bound substrate [104] PubMed:21882945

p(HGNC:BAG2) decreases act(p(HGNC:STUB1)) View Subject | View Object

For example, BAG-2 inhibits client ubiquitination by CHIP by interfering with the interaction between CHIP and E2 ubiquitin-conjugating enzymes [148]. PubMed:21882945

path(MESH:"Alzheimer Disease") association p(HGNC:STUB1) View Subject | View Object

CHIP has been linked to several neurodegenerative disorders including Huntington’s disease, Parkinson’s disease and AD as well as other diseases such as cystic fibrosis and cancer (Dickey et al., 2007b; Edkins, 2015). PubMed:29311797

path(MESH:"Cystic Fibrosis") association p(HGNC:STUB1) View Subject | View Object

CHIP has been linked to several neurodegenerative disorders including Huntington’s disease, Parkinson’s disease and AD as well as other diseases such as cystic fibrosis and cancer (Dickey et al., 2007b; Edkins, 2015). PubMed:29311797

path(MESH:"Huntington Disease") association p(HGNC:STUB1) View Subject | View Object

CHIP has been linked to several neurodegenerative disorders including Huntington’s disease, Parkinson’s disease and AD as well as other diseases such as cystic fibrosis and cancer (Dickey et al., 2007b; Edkins, 2015). PubMed:29311797

path(MESH:"Parkinson Disease") association p(HGNC:STUB1) View Subject | View Object

CHIP has been linked to several neurodegenerative disorders including Huntington’s disease, Parkinson’s disease and AD as well as other diseases such as cystic fibrosis and cancer (Dickey et al., 2007b; Edkins, 2015). PubMed:29311797

path(MESH:Neoplasms) association p(HGNC:STUB1) View Subject | View Object

CHIP has been linked to several neurodegenerative disorders including Huntington’s disease, Parkinson’s disease and AD as well as other diseases such as cystic fibrosis and cancer (Dickey et al., 2007b; Edkins, 2015). PubMed:29311797

a(HBP:"Tau epitope, 12E8") negativeCorrelation act(p(HGNC:STUB1)) View Subject | View Object

In particular, previous studies have demonstrated that the tau ubiquitin ligase, CHIP, is unable to bind and ubiquitinate tau species phosphorylated by Par-1/MARK2 on the 12E8 epitope (S262/356) [33], a p-tau species that is also resistant to degradation upon treatment with Hsp90 inhibitors [32,33]. Tau phosphorylated at the PHF1 epitope (S396/404) is still susceptible to degradation following Hsp90 inhibition and actually exhibits an enhanced interaction with Hsp90 PubMed:25031639

Appears in Networks:

p(HBP:"APP, ACR") association p(HGNC:STUB1) View Subject | View Object

the ACR (APP cytosolic region) interacts with the E3 ubiquitin-protein ligases Stub1, which binds the NH2 terminus of the ACR, and CRL4(CRBN), which is formed by Cul4a/b, Ddb1, and Crbn, and interacts with the COOH terminus of the ACR via Crbn. PubMed:27325702

Appears in Networks:

p(HBP:"Tau C3") negativeCorrelation p(HGNC:STUB1) View Subject | View Object

Recent data suggest that caspases are involved in the accumulation of tau pathology [10, 25, 26], and reductions in CHIP have been shown to cause caspase activation and increased caspase-cleaved tau levels [19]. PubMed:25374103

act(p(FPLX:Caspase)) negativeCorrelation p(HGNC:STUB1) View Subject | View Object

Recent data suggest that caspases are involved in the accumulation of tau pathology [10, 25, 26], and reductions in CHIP have been shown to cause caspase activation and increased caspase-cleaved tau levels [19]. PubMed:25374103

Out-Edges 39

p(HGNC:STUB1) increases complex(p(HGNC:STUB1), p(INTERPRO:"Heat shock protein 70 family"), p(INTERPRO:"Heat shock protein Hsp90 family")) View Subject | View Object

Two subnetworks emerged within this central network, corresponding to known Hsp90 and Hsp70 chaperone complexes (Figure 2, blue and orange squares, respectively). These two subnetworks were bridged by a unique set of cochaperones (Figure 2, tan squares). Among these were the wellknown bridging factors HOP/STIP1, TPR2/DNAJC7, and CHIP/ STUB1, validating our approach (Brychzy et al., 2003; Schmid et al., 2012; Xu et al., 2002). Other bridging factors in this first tier of organization included members of the Hsp40 chaperone family (DNAJB1 and DNAJB6), HSP70-binding protein 1 (HSPBP1), the TPR domain protein EDRF1, and the E3 ligase NRDP1/RNF41 PubMed:25036637

p(HGNC:STUB1) directlyIncreases complex(p(HGNC:STUB1), p(INTERPRO:"Heat shock protein 70 family")) View Subject | View Object

CHIP binds Hsp90 and Hsp70 with similar affinities and can regulate the degradation of chaperone clients (Kundrat and Regan, 2010). PubMed:25036637

p(HGNC:STUB1) directlyIncreases complex(p(FPLX:HSP90), p(HGNC:STUB1)) View Subject | View Object

CHIP binds Hsp90 and Hsp70 with similar affinities and can regulate the degradation of chaperone clients (Kundrat and Regan, 2010). PubMed:25036637

p(HGNC:STUB1) regulates bp(GO:"cellular protein catabolic process") View Subject | View Object

CHIP binds Hsp90 and Hsp70 with similar affinities and can regulate the degradation of chaperone clients (Kundrat and Regan, 2010). PubMed:25036637

p(HGNC:STUB1) increases p(HGNC:MAPT, pmod(Ub)) View Subject | View Object

However, another study, also using HEK cells and ubiquitin K48 and K63 mutants, demonstrated that in the presence of the E3 ligase CHIP, tau could be ubiquitylated by both K48 and K63 linkages (100). The likelihood that in vivo tau can be ubiquitylated in multiple ways is supported by studies showing tau isolated from NFTs in human brain has several forms of ubiquitin linkages as well as mono-ubiquitylation (101, 102). These data suggest that the physical structure of the ubiquitin chain is unlikely to be a sufficient signal for selectively targeting tau to either the proteasome or autophagy. PubMed:24027553

p(HGNC:STUB1) association path(MESH:"Neurodegenerative Diseases") View Subject | View Object

Several E3 Ub ligases, such as CHIP, Parkin, RNF182, may have roles in AD and other neurodegenerative diseases (Shimura et al., 2004; Khandelwal et al., 2011; Lei et al., 2012). PubMed:23528736

act(p(HGNC:STUB1)) increases bp(GO:"protein catabolic process") View Subject | View Object

Alternatively, either Hsp70 or Hsp90 can recruit the ubiquitin E3 ligase, C-terminal Hsp70 interacting protein (CHIP), to degrade the bound substrate [104] PubMed:21882945

act(p(HGNC:STUB1)) increases bp(GO:"protein ubiquitination") View Subject | View Object

For example, BAG-2 inhibits client ubiquitination by CHIP by interfering with the interaction between CHIP and E2 ubiquitin-conjugating enzymes [148]. PubMed:21882945

p(HGNC:STUB1) association path(MESH:"Huntington Disease") View Subject | View Object

CHIP has been linked to several neurodegenerative disorders including Huntington’s disease, Parkinson’s disease and AD as well as other diseases such as cystic fibrosis and cancer (Dickey et al., 2007b; Edkins, 2015). PubMed:29311797

p(HGNC:STUB1) association path(MESH:"Parkinson Disease") View Subject | View Object

CHIP has been linked to several neurodegenerative disorders including Huntington’s disease, Parkinson’s disease and AD as well as other diseases such as cystic fibrosis and cancer (Dickey et al., 2007b; Edkins, 2015). PubMed:29311797

p(HGNC:STUB1) association path(MESH:"Alzheimer Disease") View Subject | View Object

CHIP has been linked to several neurodegenerative disorders including Huntington’s disease, Parkinson’s disease and AD as well as other diseases such as cystic fibrosis and cancer (Dickey et al., 2007b; Edkins, 2015). PubMed:29311797

p(HGNC:STUB1) association path(MESH:"Cystic Fibrosis") View Subject | View Object

CHIP has been linked to several neurodegenerative disorders including Huntington’s disease, Parkinson’s disease and AD as well as other diseases such as cystic fibrosis and cancer (Dickey et al., 2007b; Edkins, 2015). PubMed:29311797

p(HGNC:STUB1) association path(MESH:Neoplasms) View Subject | View Object

CHIP has been linked to several neurodegenerative disorders including Huntington’s disease, Parkinson’s disease and AD as well as other diseases such as cystic fibrosis and cancer (Dickey et al., 2007b; Edkins, 2015). PubMed:29311797

p(HGNC:STUB1) increases deg(p(HGNC:MAPT, pmod(Ph))) View Subject | View Object

In tauopathic mice, CHIP regulates the removal of tau species that have undergone abnormal phosphorylation and folding (Dickey et al., 2007b). PubMed:29311797

p(HGNC:STUB1) increases deg(p(HGNC:MAPT, pmod(HBP:misfolding))) View Subject | View Object

In tauopathic mice, CHIP regulates the removal of tau species that have undergone abnormal phosphorylation and folding (Dickey et al., 2007b). PubMed:29311797

act(p(HGNC:STUB1)) negativeCorrelation a(HBP:"Tau epitope, 12E8") View Subject | View Object

In particular, previous studies have demonstrated that the tau ubiquitin ligase, CHIP, is unable to bind and ubiquitinate tau species phosphorylated by Par-1/MARK2 on the 12E8 epitope (S262/356) [33], a p-tau species that is also resistant to degradation upon treatment with Hsp90 inhibitors [32,33]. Tau phosphorylated at the PHF1 epitope (S396/404) is still susceptible to degradation following Hsp90 inhibition and actually exhibits an enhanced interaction with Hsp90 PubMed:25031639

Appears in Networks:

act(p(HGNC:STUB1)) increases deg(p(HGNC:MAPT)) View Subject | View Object

In particular, previous studies have demonstrated that the tau ubiquitin ligase, CHIP, is unable to bind and ubiquitinate tau species phosphorylated by Par-1/MARK2 on the 12E8 epitope (S262/356) [33], a p-tau species that is also resistant to degradation upon treatment with Hsp90 inhibitors [32,33]. Tau phosphorylated at the PHF1 epitope (S396/404) is still susceptible to degradation following Hsp90 inhibition and actually exhibits an enhanced interaction with Hsp90 PubMed:25031639

Appears in Networks:

p(HGNC:STUB1) association p(HBP:"APP, ACR") View Subject | View Object

the ACR (APP cytosolic region) interacts with the E3 ubiquitin-protein ligases Stub1, which binds the NH2 terminus of the ACR, and CRL4(CRBN), which is formed by Cul4a/b, Ddb1, and Crbn, and interacts with the COOH terminus of the ACR via Crbn. PubMed:27325702

Appears in Networks:

p(HGNC:STUB1) decreases path(HP:Neurodegeneration) View Subject | View Object

For example, overexpression of the human TPR domain-containing co- chaperone CHIP suppresses neurodegeneration in fly models expressing polyQ-containing versions of ataxin 1 and the N-terminal huntingtin fragment (Al-Ramahi et al., 2006). PubMed:27491084

p(HGNC:STUB1) increases complex(p(HGNC:MAPT, pmod(HBP:hyperphosphorylation)), p(HGNC:STUB1)) View Subject | View Object

On the other hand, it has been reported that the E3 ligase CHIP (carboxyl terminus of the Hsc70-interacting protein) binds to tau and is involved in the degradation of abnormal forms of tau, including insoluble tau and hyperphosphorylated tau, coordinately with Hsp70 (Petrucelli et al. 2004; Dickey et al. 2006). PubMed:22908190

p(HGNC:STUB1) increases complex(p(HBP:"Tau C3"), p(HGNC:STUB1)) View Subject | View Object

CHIP interacts more strongly with tauΔC than full-length tau [18], suggesting it is involved in caspase cleaved tau degradation PubMed:25374103

p(HGNC:STUB1) increases deg(p(HGNC:MAPT, pmod(HBP:hyperphosphorylation))) View Subject | View Object

Recent data suggest that a critical mediator of refolding or clearance of hyperphosphorylated tau is via the HSP70/HSP90 heat shock pathways in which a specific E3 ubiquitin ligase, CHIP (carboxy terminus Hsp70 interacting protein), can recognize and target for degradation abnormal but not normal tau molecules [14–16]. PubMed:25374103

p(HGNC:STUB1) increases deg(p(HBP:"Tau C3")) View Subject | View Object

CHIP interacts more strongly with tauΔC than full-length tau [18], suggesting it is involved in caspase cleaved tau degradation PubMed:25374103

p(HGNC:STUB1) negativeCorrelation p(HBP:"Tau C3") View Subject | View Object

Recent data suggest that caspases are involved in the accumulation of tau pathology [10, 25, 26], and reductions in CHIP have been shown to cause caspase activation and increased caspase-cleaved tau levels [19]. PubMed:25374103

p(HGNC:STUB1) increases deg(p(HBP:"Tau C3")) View Subject | View Object

These results indicate that CHIP is involved in degradation of caspases and caspase-cleaved tau. PubMed:25374103

p(HGNC:STUB1) causesNoChange bp(GO:"cell death") View Subject | View Object

Toxicity assays revealed that neither CHIP nor any of the tau constructs caused cell death compared to the control GFP vector (Supplementary Fig. 1). PubMed:25374103

p(HGNC:STUB1) increases complex(p(HGNC:HSPA8), p(HGNC:MAPT, pmod(Ub)), p(HGNC:STUB1)) View Subject | View Object

Either of these domains could be critical for degradation of tau since ubiquitination targets proteins for degradation and CHIP is known to interact with full-length tau in a complex with Hsc70/Hsp70 and poly-ubiquitinated tau [17]. PubMed:25374103

p(HGNC:STUB1) increases deg(p(HBP:"4R tau", var("p.Lys280del"))) View Subject | View Object

After cyclohexamide treatment, we could still detect a significant decrease in tau levels in cells that were co-transfected with CHIP indicating that the reduction in tau levels due to CHIP is due to degradation and not to transcriptional down-regulation (Supplementary Fig. 3). PubMed:25374103

p(HGNC:STUB1) negativeCorrelation act(p(FPLX:Caspase)) View Subject | View Object

Recent data suggest that caspases are involved in the accumulation of tau pathology [10, 25, 26], and reductions in CHIP have been shown to cause caspase activation and increased caspase-cleaved tau levels [19]. PubMed:25374103

p(HGNC:STUB1) increases deg(p(FPLX:Caspase)) View Subject | View Object

These results indicate that CHIP is involved in degradation of caspases and caspase-cleaved tau. PubMed:25374103

p(HGNC:STUB1) increases p(HGNC:MAPT, pmod(UbK48)) View Subject | View Object

Tau is known to be ubiquitylated through Lys48 linkages by CHIP for proteasomal degradation PubMed:26631930

About

BEL Commons is developed and maintained in an academic capacity by Charles Tapley Hoyt and Daniel Domingo-Fernández at the Fraunhofer SCAI Department of Bioinformatics with support from the IMI project, AETIONOMY. It is built on top of PyBEL, an open source project. Please feel free to contact us here to give us feedback or report any issues. Also, see our Publishing Notes and Data Protection information.

If you find BEL Commons useful in your work, please consider citing: Hoyt, C. T., Domingo-Fernández, D., & Hofmann-Apitius, M. (2018). BEL Commons: an environment for exploration and analysis of networks encoded in Biological Expression Language. Database, 2018(3), 1–11.