NLR family pyrin domain containing 12 (NLRP12)

NLR family pyrin domain containing 12 (NLRP12, also known as NALP12 or Monarch-1) is an intracellular pattern recognition receptor belonging to the NOD-like receptor family. It contains an N-terminal pyrin domain, a central NACHT nucleotide-binding oligomerization domain critical for ATP binding and function, and C-terminal leucine-rich repeats. Expressed mainly in myeloid cells such as dendritic cells and macrophages, it plays a dual role in regulating inflammation—primarily acting as an inhibitor by suppressing NF-kB signaling but also capable of promoting inflammatory cell death under certain conditions via formation of multiprotein complexes like the PANoptosome. Mutations affecting its structure or function are associated with rare hereditary autoinflammatory disorders such as familial cold autoinflammatory syndrome type 2 (FCAS2) and have been implicated in pathological responses during hemolytic crises and infections including COVID‑19. While not yet directly targeted by approved therapeutics, it remains an area of active research due to its central role at the intersection between innate immunity regulation and inflammatory disease pathogenesis.

Other names

NACHT, LRR and PYD domains-containing protein 12NALP12Monarch-1Monarch1PAN6PYPAF7Pyrin-containing APAF1-like protein 7

Potential mechanisms for future drugs could include modulation of ATP binding to the NACHT domain or altering inflammasome assembly/function; current research focuses on how mutations affect these processes rather than direct pharmacological targeting.