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NDP-heptoses: from bacterial metabolism to host sensing
Michelle C C Lim1, Michael Naumann1
1Institute of Experimental Internal Medicine, Medical Faculty, Otto von Guericke University, Magdeburg, Germany.
Trends in Microbiology
|May 25, 2026
Summary
NDP-heptoses are bacterial metabolites that modulate host signaling. ADP-glycero-β-d-manno-heptose activates alpha-protein kinase 1 (ALPK1), integrating microbial signals with host immune and tissue responses.
Area of Science:
- Microbiology and Immunology
- Molecular Biology
- Host-Pathogen Interactions
Background:
- Bacterial metabolites, specifically NDP-heptoses, are increasingly recognized for their roles in host signaling.
- ADP-glycero-β-d-manno-heptose is a key NDP-heptose, acting as a pathogen-associated molecular pattern.
- Alpha-protein kinase 1 (ALPK1) is a receptor for ADP-glycero-β-d-manno-heptose.
Purpose of the Study:
- To elucidate the function of bacterial metabolite NDP-heptoses in host signaling.
- To understand the mechanism of ALPK1 activation by ADP-glycero-β-d-manno-heptose.
- To explore how ALPK1 integrates microbial cues with host immune and tissue responses.
Main Methods:
- Analysis of bacterial metabolite structures and functions.
- Biochemical assays to study ALPK1 activation.
- Cellular and animal models to investigate host responses.
Main Results:
- NDP-heptoses are identified as crucial modulators of host cell signaling pathways.
- ADP-glycero-β-d-manno-heptose triggers ALPK1 activation, functioning as a pathogen-associated molecular pattern.
- Context-dependent ALPK1 activation demonstrates its role in integrating microbial signals with host immunity and tissue homeostasis.
Conclusions:
- Bacterial NDP-heptoses represent a significant class of signaling molecules impacting host physiology.
- ALPK1 serves as a critical sensor for microbial components, bridging innate immunity and host responses.
- Understanding this pathway offers insights into host-pathogen interactions and potential therapeutic targets.
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