Ubiquitin ligase Cbl-b acts as a negative regulator in discoidin domain receptor 2 signaling via modulation of its stability.
FEBS Lett
; 588(9): 1509-14, 2014 May 02.
Article
in En
| MEDLINE
| ID: mdl-24631539
ABSTRACT
Discoidin domain receptor 2 (DDR2), a collagen receptor tyrosine kinase, initiates signal transduction upon collagen binding, but little is known as to how DDR2 signaling is negatively regulated. Herein we demonstrate that Cbl family member Cbl-b predominantly promotes the ubiquitination of DDR2 upon collagen II stimulation. Cbl-b-mediated ubiquitination accelerates the degradation of activated DDR2. Finally, the production of MMP-13, a downstream target of DDR2, is enhanced in Cbl-b-knocked down MC3T3-E1 cells and Cbl-b-deficient mouse primary synovial fibroblasts. Thus, Cbl-b, by promoting the ubiquitination and degradation of DDR2, functions as a negative regulator in the DDR2 signaling pathway.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Receptors, Mitogen
/
Receptor Protein-Tyrosine Kinases
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Adaptor Proteins, Signal Transducing
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Proto-Oncogene Proteins c-cbl
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Ubiquitination
Limits:
Animals
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Humans
Language:
En
Journal:
FEBS Lett
Year:
2014
Document type:
Article