Ligation-induced multimerisation of Dectin-1

Where it participates (unsigned role)

1. Beta-glucans can adopt solution structures ranging from random coil to insoluble fibre due to tertiary helical and quaternary structure, and despite similar affinity for Dectin-1 the ability of glucans to induce Dectin-1A-mediated signalling correlates with degree of structure, with glucan denaturation experiments showing that glucan structure determines agonistic potential but not receptor binding affinity, while fluorescence measurements provided direct evidence of ligation-induced Dectin-1A aggregation which positively correlated with increasing glucan structure content.

   Solution conformation of a glucan, from random coil to insoluble fibre → Ability of a bound glucan to produce a receptor signal source_derived_draftungraded
   Experimental context and source evidence

   availability_state

   biomarker_context Imported condition classification; unverified.

   evidence_span

   {"source_cache": "artifacts/glucan-research/37515324.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "c5c602f96f0ff319650a47cb53c772df30c0dc267f6e82c46ae51bb5285b6d3f", "start_char": 0, "end_char": 1658, "text_sha256": "c5c602f96f0ff319650a47cb53c772df30c0dc267f6e82c46ae51bb5285b6d3f"}

   experimental_model

   Glucan denaturation, fluorescence measurement of receptor aggregation and diffusion, and fungal particle contact sites

   exposure

   Fungal beta-glucans of low, medium and high molecular weight differing in helical structure content, before and after denaturation

   limitations

   A single-receptor-isoform study using defined glucan conformations. The aggregates observed were small, a few engaged receptors rather than synapse-scale structures.

   nutrient_topic

   Beta-glucan research collection; topical membership is not evidence of a direct clinical effect, and each preparation is recorded as its own entity with no family link joining any pair. · Beta-glucan

   organism

   Human receptor in cultured cells

   plain_language

   What decides whether the receptor fires is the shape the sugar holds in solution, not how tightly it sticks and not whether it dissolves.

   primary_references

   [bg-p37515324] Dectin-1 multimerization and signaling depends on fungal β-glucan structure and exposure. (2023). https://pubmed.ncbi.nlm.nih.gov/37515324/ DOI: 10.1016/j.bpj.2023.07.021

   tissue_or_cell_type

   Dectin-1A-expressing cells and Candida cell wall

   trigger_kind

   biomarker_context Imported condition classification; unverified.

   Beta-glucan: a structural family rather than an agent, what decides whether a bound glucan actually signals, the complement route that a cereal and a yeast preparation share, and the unequal human evidence behind each (2026-09-22) · lines 151–162

   AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Glucan denaturation, fluorescence measurement of receptor aggregation and diffusion, and fungal particle contact sites · source_derived_draft · unverified_draft

   ### bg-structure-not-solubility-signals Beta-glucans can adopt solution structures ranging from random coil to insoluble fibre due to tertiary helical and quaternary structure, and despite similar affinity for Dectin-1 the ability of glucans to induce Dectin-1A-mediated signalling correlates with degree of structure, with glucan denaturation experiments showing that glucan structure determines agonistic potential but not receptor binding affinity, while fluorescence measurements provided direct evidence of ligation-induced Dectin-1A aggregation which positively correlated with increasing glucan structure content. Condition category: biomarker_context nutrient_topic: Beta-glucan research collection; topical membership is not evidence of a direct clinical effect, and each preparation is recorded as its own entity with no family link joining any pair. plain_language: What decides whether the receptor fires is the shape the sugar holds in solution, not how tightly it sticks and not whether it dissolves. organism: Human receptor in cultured cells tissue_or_cell_type: Dectin-1A-expressing cells and Candida cell wall experimental_model: Glucan denaturation, fluorescence measurement of receptor aggregation and diffusion, and fungal particle contact sites limitations: A single-receptor-isoform study using defined glucan conformations. The aggregates observed were small, a few engaged receptors rather than synapse-scale structures. exposure: Fungal beta-glucans of low, medium and high molecular weight differing in helical structure content, before and after denaturation evidence_span: {"source_cache": "artifacts/glucan-research/37515324.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "c5c602f96f0ff319650a47cb53c772df30c0dc267f6e82c46ae51bb5285b6d3f", "start_char": 0, "end_char": 1658, "text_sha256": "c5c602f96f0ff319650a47cb53c772df30c0dc267f6e82c46ae51bb5285b6d3f"} [bg-p37515324] Dectin-1 multimerization and signaling depends on fungal β-glucan structure and exposure. (2023). https://pubmed.ncbi.nlm.nih.gov/37515324/ DOI: 10.1016/j.bpj.2023.07.021

   Complete structured claim and evidence