PMID- 29382759
OWN - NLM
STAT- In-Data-Review
LR  - 20180215
IS  - 1091-6490 (Electronic)
IS  - 0027-8424 (Linking)
VI  - 115
IP  - 7
DP  - 2018 Feb 13
TI  - Assembly mechanism of the CARMA1-BCL10-MALT1-TRAF6 signalosome.
PG  - 1499-1504
LID - 10.1073/pnas.1721967115 [doi]
AB  - The CARMA1-BCL10-MALT1 (CBM) signalosome is a central mediator of T cell receptor
      and B cell receptor-induced NF-kappaB signaling that regulates multiple
      lymphocyte functions. While caspase-recruitment domain (CARD) membrane-associated
      guanylate kinase (MAGUK) protein 1 (CARMA1) nucleates B cell lymphoma 10 (BCL10) 
      filament formation through interactions between CARDs, mucosa-associated lymphoid
      tissue lymphoma translocation protein 1 (MALT1) is a paracaspase with structural 
      similarity to caspases, which recruits TNF receptor-associated factor 6 (TRAF6)
      for K63-linked polyubiquitination. Here we present cryo-electron microscopy
      (cryo-EM) structure of the BCL10 CARD filament at 4.0-A resolution. The structure
      redefines CARD-CARD interactions compared with the previous EM structure
      determined from a negatively stained sample. Surprisingly, time-lapse confocal
      imaging shows that BCL10 polymerizes in a unidirectional manner. CARMA1, the
      BCL10 nucleator, serves as a hub for formation of star-shaped filamentous
      networks of BCL10 and significantly decreases the lag period of BCL10
      polymerization. Cooperative MALT1 interaction with BCL10 filaments observed under
      EM suggests immediate dimerization of MALT1 in the BCL10 filamentous scaffold. In
      addition, TRAF6 cooperatively decorates CBM filaments to form higher-order
      assemblies, likely resulting in all-or-none activation of the downstream pathway.
      Collectively, these data reveal biophysical mechanisms in the assembly of the
      CARMA1-BCL10-MALT1-TRAF6 complex for signal transduction.
FAU - David, Liron
AU  - David L
AD  - Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical
      School, Boston, MA 02115.
AD  - Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston,
      MA 02115.
FAU - Li, Yang
AU  - Li Y
AD  - Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical
      School, Boston, MA 02115.
AD  - Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston,
      MA 02115.
FAU - Ma, Jun
AU  - Ma J
AD  - National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese
      Academy of Sciences, Beijing 100101, China.
FAU - Garner, Ethan
AU  - Garner E
AD  - Department of Molecular and Cellular Biology, Center for Systems Biology, Harvard
      University, Cambridge, MA 02138.
FAU - Zhang, Xinzheng
AU  - Zhang X
AD  - National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese
      Academy of Sciences, Beijing 100101, China.
FAU - Wu, Hao
AU  - Wu H
AD  - Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical
      School, Boston, MA 02115; wu@crystal.harvard.edu.
AD  - Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston,
      MA 02115.
LA  - eng
SI  - PDB/6BZE
PT  - Journal Article
DEP - 20180130
PL  - United States
TA  - Proc Natl Acad Sci U S A
JT  - Proceedings of the National Academy of Sciences of the United States of America
JID - 7505876
OTO - NOTNLM
OT  - CARMA1-BCL10-MALT1
OT  - TRAF6
OT  - assembly
OT  - cryo-EM
OT  - innate immunity
COIS- The authors declare no conflict of interest.
EDAT- 2018/02/01 06:00
MHDA- 2018/02/01 06:00
CRDT- 2018/02/01 06:00
PHST- 2018/02/01 06:00 [pubmed]
PHST- 2018/02/01 06:00 [medline]
PHST- 2018/02/01 06:00 [entrez]
AID - 1721967115 [pii]
AID - 10.1073/pnas.1721967115 [doi]
PST - ppublish
SO  - Proc Natl Acad Sci U S A. 2018 Feb 13;115(7):1499-1504. doi:
      10.1073/pnas.1721967115. Epub 2018 Jan 30.