Gingipain R (EC3.4.22.37, Arg-gingipain, gingipain-1, argingipain, Arg-gingivain-55 proteinase, Arg-gingivain-70 proteinase, Arg-gingivain-75 proteinase, arginine-specific cysteine protease, arginine-specific gingipain, arginine-specific gingivain, RGP-1, RGP) is an enzyme.[1][2][3] This enzyme catalyses the following chemical reaction:
Hydrolysis of proteins and small molecule substrates, with a preference for Arg in P1 (position 1)
↑Kirszbaum L, Sotiropoulos C, Jackson C, Cleal S, Slakeski N, Reynolds EC (February 1995). "Complete nucleotide sequence of a gene prtR of Porphyromonas gingivalis W50 encoding a 132 kDa protein that contains an arginine-specific thiol endopeptidase domain and a haemagglutinin domain". Biochemical and Biophysical Research Communications. 207 (1): 424–31. Bibcode:1995BBRC..207..424K. doi:10.1006/bbrc.1995.1205. PMID7857299.