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Title: Mechanism of pathogen recognition by human dectin-2

Journal Article · · Journal of Biological Chemistry
 [1];  [2];  [2];  [2];  [1];  [2]
  1. Stanford Univ., CA (United States). School of Medicine. Dept. of Structural Biology and and Molecular and Cellular Physiology
  2. Imperial College, London (United Kingdom). Dept. of Life Sciences

Dectin-2, a C-type lectin on macrophages and other cells of the innate immune system, functions in response to pathogens, particularly fungi. The carbohydrate-recognition domain (CRD) in dectin-2 is linked to a transmembrane sequence that interacts with the common Fc receptor subunit to initiate immune signaling. The molecular mechanism by which dectin-2 selectively binds to pathogens has been investigated by characterizing the CRD expressed in a bacterial system. Competition binding studies indicated that the CRD binds to monosaccharides with modest affinity and that affinity was greatly enhanced for mannose-linked1-2 or1-4 to a second mannose residue. Glycan array analysis confirmed selective binding of the CRD to glycans that contain Man1-2Man epitopes. Crystals of the CRD in complex with a mammalian-type high-mannose Man9GlcNAc2 oligosaccharide exhibited interaction with Man1–2Man on two different termini of the glycan, with the reducing-end mannose residue ligated to Ca2 in a primary binding site and the nonreducing terminal mannose residue occupying an adjacent secondary site. Comparison of the binding sites in DC-SIGN and langerin, two other pathogen-binding receptors of the innate immune system, revealed why these two binding sites accommodate only terminal Man1-2Man structures, whereas dectin-2 can bind Man1–2Man in internal positions in mannans and other polysaccharides. The specificity and geometry of the dectin-2-binding site provide the molecular mechanism for binding of dectin-2 to fungal mannans and also to bacterial lipopolysaccharides, capsular polysaccharides, and lipoarabinomannans that contain the Man1-2Man disaccharide unit.

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1625085
Journal Information:
Journal of Biological Chemistry, Vol. 292, Issue 32; ISSN 0021-9258
Publisher:
American Society for Biochemistry and Molecular BiologyCopyright Statement
Country of Publication:
United States
Language:
English

References (56)

Survey of immune-related, mannose/fucose-binding C-type lectin receptors reveals widely divergent sugar-binding specificities journal November 2010
Trimeric Structure of Langerin journal February 2010
Structural Basis for Langerin Recognition of Diverse Pathogen and Mammalian Glycans through a Single Binding Site journal January 2011
C-Type Lectin Receptors Dectin-3 and Dectin-2 Form a Heterodimeric Pattern-Recognition Receptor for Host Defense against Fungal Infection journal August 2013
Dectin-2 is a Syk-coupled pattern recognition receptor crucial for Th17 responses to fungal infection journal August 2009
Defining the conformation of human mincle that interacts with mycobacterial trehalose dimycolate journal July 2014
Organization of the extracellular portion of the macrophage galactose receptor: A trimeric cluster of simple binding sites for N-acetylgalactosamine journal March 2013
Crystallographic Complexes of Surfactant Protein A and Carbohydrates Reveal Ligand-induced Conformational Change journal November 2010
The beta1 2-d-xylose and alpha1 3-l-fucose substituted N-linked oligosaccharides from Erythrina cristagalli lectin. Isolation, characterisation and comparison with other legume lectins journal July 1987
Schistosoma mansoni triggers Dectin-2, which activates the Nlrp3 inflammasome and alters adaptive immune responses journal November 2010
Structures of Lipopolysaccharides from Klebsiella pneumoniae: ELUCIDATION OF THE STRUCTURE OF THE LINKAGE REGION BETWEEN CORE AND POLYSACCHARIDE O CHAIN AND IDENTIFICATION OF THE RESIDUES AT THE NON-REDUCING TERMINI OF THE O CHAINS journal May 2002
Dectin-2 Recognition of α-Mannans and Induction of Th17 Cell Differentiation Is Essential for Host Defense against Candida albicans journal May 2010
Dectin-2 Recognizes Mannosylated O-antigens of Human Opportunistic Pathogens and Augments Lipopolysaccharide Activation of Myeloid Cells journal June 2016
Recognition of Mannosylated Ligands and Influenza A Virus by Human Surfactant Protein D: Contributions of an Extended Site and Residue 343 , journal April 2009
Structural Characterisation of Ligand-Binding Determinants in Human Lung Surfactant Protein D: Influence of Asp325 journal December 2009
How good are my data and what is the resolution? journal June 2013
Structural insights into what glycan arrays tell us about how glycan-binding proteins interact with their ligands journal June 2009
α-gal f 1→6-α-mannopyranoside side chains in Paracoccidioides brasiliensis cell wall are shared by members of the Onygenales, but not by galactomannans of other fungal genera journal January 2005
Recent developments in the PHENIX software for automated crystallographic structure determination journal November 2003
Mechanism for Recognition of an Unusual Mycobacterial Glycolipid by the Macrophage Receptor Mincle journal August 2013
NMR study of the galactomannans of Trichophyton mentagrophytes and Trichophyton rubrum journal April 1997
Orientation of Bound Ligands in Mannose-binding Proteins: IMPLICATIONS FOR MULTIVALENT LIGAND RECOGNITION journal February 2002
Use of Peptide Libraries to Map the Substrate Specificity of a Peptide-Modifying Enzyme: A 13 Residue Consensus Peptide Specifies Biotinylation in Escherichia coli journal October 1993
The C-type lectin superfamily in the immune system journal June 1998
XDS journal January 2010
Primary structure and functional expression from complementary DNA of a human interleukin-1 receptor antagonist journal January 1990
Structural basis for distinct ligand-binding and targeting properties of the receptors DC-SIGN and DC-SIGNR journal June 2004
Conformational Analysis of β-1,2-Linked Mannobiose to Mannoheptaose, Specific Antigen of Pathogenic Yeast Candida albicans journal January 2010
Dectin-2 Is a Direct Receptor for Mannose-Capped Lipoarabinomannan of Mycobacteria journal September 2014
Characterization studies on a new lectin found in seeds of Vicia ervilia journal September 1975
Structural Analysis of Monosaccharide Recognition by Rat Liver Mannose-binding Protein journal January 1996
Signaling by Myeloid C-Type Lectin Receptors in Immunity and Homeostasis journal April 2012
The Preparation of 131i-Labelled Human Growth Hormone of high Specific Radioactivity journal October 1963
Coot model-building tools for molecular graphics journal November 2004
Molecular Cloning of Human Dectin-2 journal June 2004
Dendroscope 3: An Interactive Tool for Rooted Phylogenetic Trees and Networks journal September 2012
Identification of Distinct Ligands for the C-type Lectin Receptors Mincle and Dectin-2 in the Pathogenic Fungus Malassezia journal April 2013
Structural and serological studies on Hafnia alvei O-specific polysaccharide of α-d-mannan type isolated from the lipopolysaccharide of strain PCM 1223 journal April 2001
Dectin-2 Is a Pattern Recognition Receptor for Fungi That Couples with the Fc Receptor γ Chain to Induce Innate Immune Responses journal October 2006
Role of Dectin-2 for Host Defense against Systemic Infection with Candida glabrata journal December 2013
Dectin-2 is a Syk-coupled pattern recognition receptor crucial for Th17 responses to fungal infection journal September 2009
Fast, scalable generation of high‐quality protein multiple sequence alignments using Clustal Omega journal January 2011
Purification of soybean agglutinin by affinity chromatography On sepharose- N -ϵ-aminocaproyl-β-D-galactopyranosylamine journal August 1972
Structural analysis for glycolipid recognition by the C-type lectins Mincle and MCL journal October 2013
Cloning of a Novel C-type Lectin Expressed by Murine Macrophages journal July 1998
Profiling Carbohydrate-Receptor Interaction with Recombinant Innate Immunity Receptor-Fc Fusion Proteins journal October 2009
A Novel Mechanism for Binding of Galactose-terminated Glycans by the C-type Carbohydrate Recognition Domain in Blood Dendritic Cell Antigen 2 journal May 2015
Structural Basis of Lectin-Carbohydrate Recognition journal June 1996
The carbohydrate-recognition domain of Dectin-2 is a C-type lectin with specificity for high mannose journal January 2006
Identification and expression profiling of a human C-type lectin, structurally homologous to mouse dectin-2 journal April 2005
Dectin-2 Regulates the Effector Phase of House Dust Mite–Elicited Pulmonary Inflammation Independently from Its Role in Sensitization journal January 2014
DCIR interacts with ligands from both endogenous and pathogenic origin journal March 2014
Dectin-2 is predominantly myeloid restricted and exhibits unique activation-dependent expression on maturing inflammatory monocytes elicitedin vivo journal July 2005
Recognition of Bisecting N -Acetylglucosamine: STRUCTURAL BASIS FOR ASYMMETRIC INTERACTION WITH THE MOUSE LECTIN DENDRITIC CELL INHIBITORY RECEPTOR 2 journal October 2013
Phaser crystallographic software journal July 2007
Multiple Modes of Binding Enhance the Affinity of DC-SIGN for High Mannose N-Linked Glycans Found on Viral Glycoproteins journal November 2006

Cited By (11)

Dectin-2-Targeted Antifungal Liposomes Exhibit Enhanced Efficacy journal October 2019
On-Chip Screening of a Glycomimetic Library with C-Type Lectins Reveals Structural Features Responsible for Preferential Binding of Dectin-2 over DC-SIGN/R and Langerin journal September 2018
Making glycoproteins a little bit sweeter with PDB-REDO journal July 2018
Heat-killed Candida albicans augments synthetic bacterial component-induced proinflammatory cytokine production journal January 2019
CD23 is a glycan-binding receptor in some mammalian species journal September 2019
Deciphering the molecular basis of mycobacteria and lipoglycan recognition by the C-type lectin Dectin-2 journal November 2018
N -Carboxyanhydride Polymerization of Glycopolypeptides That Activate Antigen-Presenting Cells through Dectin-1 and Dectin-2 journal February 2018
Mannan detecting C-type lectin receptor probes recognise immune epitopes with diverse chemical, spatial and phylogenetic heterogeneity in fungal cell walls journal January 2020
Mammalian sugar‐binding receptors: known functions and unexplored roles journal February 2019
Association of modulation of pro‐inflammatory responses by dectin‐2 with preterm delivery: An experimental model journal December 2019
N -Carboxyanhydride Polymerization of Glycopolypeptides That Activate Antigen-Presenting Cells through Dectin-1 and Dectin-2 journal February 2018

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