STRING 9.05 
GPR18 [ENSP00000343428]
G protein-coupled receptor 18; Receptor for N-arachidonyl glycine. The activity of this receptor is mediated by G proteins which inhibit adenylyl cyclase. May contribute to regulation of the immune system
CCR1 [ENSP00000296140]
chemokine (C-C motif) receptor 1; Receptor for a C-C type chemokine. Binds to MIP-1-alpha, MIP-1-delta, RANTES, and MCP-3 and, less efficiently, to MIP-1- beta or MCP-1 and subsequently transduces a signal by increasing the intracellular calcium ions level. Responsible for affecting stem cell proliferation
Evidence suggesting a functional link:
Neighborhood in the Genome:  
none / insignificant.
Gene Fusions:  
none / insignificant.
Cooccurence Across Genomes:  
none / insignificant.
none / insignificant.
Experimental/Biochemical Data:  
none / insignificant.
Association in Curated Databases:   yes (score 0.900).  
Co-Mentioned in PubMed Abstracts:   yes (score 0.065).  
Combined Score:
Note: the two proteins have some sequence similarity (134.5 bits over 276 amino acids. click here to see the alignment).
Evidence for specific actions:
Reaction:yes (score: 0.900)