Abstract:
:While the I kappa kinase (IKK) scaffolding protein NF-κB essential modulator (NEMO) binds to polyubiquitin chains to transmit inflammatory signals, NEMO itself is also ubiquitinated in response to a variety of inflammatory agonists. Although there have been hints that polyubiquitination of NEMO is essential for avoiding inflammatory disorders, the in vivo physiologic role of NEMO ubiquitination is unknown. In this work, we knock in a NEMO allele in which two major inflammatory agonist-induced ubiquitination sites cannot be ubiquitinated. We show that mice with a nonubiquitinatable NEMO allele display embryonic lethality. Heterozygous females develop inflammatory skin lesions, decreased B cell numbers, and hypercellular spleens. Embryonic lethality can be complemented by mating onto a TNFR1(-/-) background, at the cost of severe steatohepatitis and early mortality, and we also show that NEMO ubiquitination is required for optimal innate immune signaling responses. These findings suggest that NEMO ubiquitination is crucial for NF-κB activity in response to innate immune agonists.
journal_name
Cell Repjournal_title
Cell reportsauthors
Jun JC,Kertesy S,Jones MB,Marinis JM,Cobb BA,Tigno-Aranjuez JT,Abbott DWdoi
10.1016/j.celrep.2013.06.036subject
Has Abstractpub_date
2013-07-25 00:00:00pages
352-61issue
2issn
2211-1247pii
S2211-1247(13)00328-8journal_volume
4pub_type
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