TAK1 adaptor proteins, TAB2 and TAB3, link the signalosome to B-cell receptor-induced IKK activation

Hisaaki Shinohara, Tomoharu Yasuda, Tomohiro Kurosaki

Research output: Contribution to journalLetter

3 Citations (Scopus)


Transforming growth factor-β-activated kinase (TAK)1-binding proteins (TAB) activate nuclear factor-κB by linking TAK1 to signaling molecules. We investigated the mechanisms underlying B-cell receptor (BCR) signaling in TAB2- and TAB3-deficient and TAB3 domain deletion mutant DT40 B cell lines. Loss of TAB2 and TAB3 abolished BCR-induced inhibitor of κB kinase (IKK) activation and TAK1 binding to caspase recruitment domain membrane-associated guanylate kinase protein (CARMA)1. Deletion of TAB3, coupling of ubiquitin conjugation to ER degradation, coiled-coil, and zinc finger domains blocked IKK activation and association with CARMA1. Thus, TAB2 and TAB3 connect signaling molecules that activate IKK in BCR signaling.

Original languageEnglish
Pages (from-to)3264-3269
Number of pages6
JournalFEBS Letters
Issue number18
Publication statusPublished - Sep 1 2016


All Science Journal Classification (ASJC) codes

  • Biophysics
  • Structural Biology
  • Biochemistry
  • Molecular Biology
  • Genetics
  • Cell Biology

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