participates in inflammatory response adenylate cyclase-inhibiting G protein-coupled acetylcholine receptor signaling pathway positive regulation of cytosolic calcium ion concentration phospholipase C-activating G protein-coupled acetylcholine receptor signaling pathway synaptic transmission, cholinergic H4 histamine receptor Homo sapiens protein histamine H4 receptor (human) GPRv53 (human) UniProtKB:Q9H3N8 PR:Q9H3N8 AXOR35 (human) SP9144 (human) G-protein coupled receptor 105 (human) Category=organism-gene. HH4R (human) H4R (human) HRH4 An H4 histamine receptor that is encoded in the genome of human. hHRH4 Pfi-013 (human) Reactome:R-HSA-390910 GPCR105 DTO:02100233 protein