The function of ENSG00000167851 (CD300A, CD300a molecule) is as follows. Inhibitory receptor which may contribute to the down- regulation of cytolytic activity in natural killer (NK) cells, and to the down-regulation of mast cell degranulation (PubMed:10746781, PubMed:16339535, PubMed:9701027). Negatively regulates the Toll-like receptor (TLR) signaling mediated by MYD88 but not TRIF through activation of PTPN6 (PubMed:22043923). {ECO:0000269|PubMed:10746781, ECO:0000269|PubMed:16339535, ECO:0000269|PubMed:22043923, ECO:0000269|PubMed:9701027}.