6E26

NMR solution structure of the CARD9 CARD


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Picomolar zinc binding modulates formation of Bcl10-nucleating assemblies of the caspase recruitment domain (CARD) of CARD9.

Holliday, M.J.Ferrao, R.de Leon Boenig, G.Estevez, A.Helgason, E.Rohou, A.Dueber, E.C.Fairbrother, W.J.

(2018) J. Biol. Chem. 293: 16803-16817

  • DOI: 10.1074/jbc.RA118.004821
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The caspase recruitment domain-containing protein 9 (CARD9)-B-cell lymphoma/leukemia 10 (Bcl10) signaling axis is activated in myeloid cells during the innate immune response to a variety of diverse pathogens. This signaling pathway requires a critic ...

    The caspase recruitment domain-containing protein 9 (CARD9)-B-cell lymphoma/leukemia 10 (Bcl10) signaling axis is activated in myeloid cells during the innate immune response to a variety of diverse pathogens. This signaling pathway requires a critical caspase recruitment domain (CARD)-CARD interaction between CARD9 and Bcl10 that promotes downstream activation of factors, including NF-κB and the mitogen-activated protein kinase (MAPK) p38. Despite these insights, CARD9 remains structurally uncharacterized, and little mechanistic understanding of its regulation exists. We unexpectedly found here that the CARD in CARD9 binds to Zn 2+ with picomolar affinity-a concentration comparable with the levels of readily accessible Zn 2+ in the cytosol. NMR solution structures of the CARD9-CARD in the apo and Zn 2+ -bound states revealed that Zn 2+ has little effect on the ground-state structure of the CARD; yet the stability of the domain increased considerably upon Zn 2+ binding, with a concomitant reduction in conformational flexibility. Moreover, Zn 2+ binding inhibited polymerization of the CARD9-CARD into helical assemblies. Here, we also present a 20-Å resolution negative-stain EM (NS-EM) structure of these filamentous assemblies and show that they adopt a similar helical symmetry as reported previously for filaments of the Bcl10 CARD. Using both bulk assays and direct NS-EM visualization, we further show that the CARD9-CARD assemblies can directly template and thereby nucleate Bcl10 polymerization, a capacity considered critical to propagation of the CARD9-Bcl10 signaling cascade. Our findings indicate that CARD9 is a potential target of Zn 2+ -mediated signaling that affects Bcl10 polymerization in innate immune responses.


    Organizational Affiliation

    From the Early Discovery Biochemistry Department and dueber.erin@gene.com.,Structural Biology Department, Genentech, South San Francisco, California 94080.,From the Early Discovery Biochemistry Department and.,From the Early Discovery Biochemistry Department and fairbrother.wayne@gene.com.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Caspase recruitment domain-containing protein 9
A
97Homo sapiensMutation(s): 0 
Gene Names: CARD9
Find proteins for Q9H257 (Homo sapiens)
Go to Gene View: CARD9
Go to UniProtKB:  Q9H257
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-09-26
    Type: Initial release
  • Version 1.1: 2018-11-07
    Type: Data collection, Database references