The dendritic cell receptor Clec9A binds damaged cells via exposed actin filaments - PubMed (original) (raw)
. 2012 Apr 20;36(4):646-57.
doi: 10.1016/j.immuni.2012.03.009. Epub 2012 Apr 5.
Peter E Czabotar, Antonia N Policheni, Irina Caminschi, Soo San Wan, Susie Kitsoulis, Kirsteen M Tullett, Adeline Y Robin, Rajini Brammananth, Mark F van Delft, Jinhua Lu, Lorraine A O'Reilly, Emma C Josefsson, Benjamin T Kile, Wei Jin Chin, Justine D Mintern, Maya A Olshina, Wilson Wong, Jake Baum, Mark D Wright, David C S Huang, Narla Mohandas, Ross L Coppel, Peter M Colman, Nicos A Nicola, Ken Shortman, Mireille H Lahoud
Affiliations
- PMID: 22483802
- DOI: 10.1016/j.immuni.2012.03.009
Free article
The dendritic cell receptor Clec9A binds damaged cells via exposed actin filaments
Jian-Guo Zhang et al. Immunity. 2012.
Free article
Abstract
The immune system must distinguish viable cells from cells damaged by physical and infective processes. The damaged cell-recognition molecule Clec9A is expressed on the surface of the mouse and human dendritic cell subsets specialized for the uptake and processing of material from dead cells. Clec9A recognizes a conserved component within nucleated and nonnucleated cells, exposed when cell membranes are damaged. We have identified this Clec9A ligand as a filamentous form of actin in association with particular actin-binding domains of cytoskeletal proteins. We have determined the crystal structure of the human CLEC9A C-type lectin domain and propose a functional dimeric structure with conserved tryptophans in the ligand recognition site. Mutation of these residues ablated CLEC9A binding to damaged cells and to the isolated ligand complexes. We propose that Clec9A provides targeted recruitment of the adaptive immune system during infection and can also be utilized to enhance immune responses generated by vaccines.
Copyright © 2012 Elsevier Inc. All rights reserved.
Comment in
- Dendritic cells: actin a dangerous part.
Bordon Y. Bordon Y. Nat Rev Immunol. 2012 Apr 25;12(5):321. doi: 10.1038/nri3222. Nat Rev Immunol. 2012. PMID: 22531319 No abstract available. - Molecular assassins from within: intracellular DAMPs from injured cells initiate tissue inflammation.
Fairchild RL, Bromberg JS. Fairchild RL, et al. Am J Transplant. 2012 Dec;12(12):3169. doi: 10.1111/ajt.12040. Am J Transplant. 2012. PMID: 23198784 No abstract available.
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