MMP2 can be activated by MMP1 (Crabbe et al. 1994a, Sang et al. 1996) and MMP7 (Crabbe et al. 1994b, Sang et al. 1996). MMP1 initially cleaves either Pro33-Ile34 or Asn66-Leu67. This is followed by autolytic cleavage at Asn109-Tyr110 (Crabbe et al. 1994a, Okada et al. 1990, Sang et al. 1996). MMP1 and MMP7 are not efficient activators of MMP2; significant physiological activation of proMMP2 is performed by the MT-MMPs MMP14 (Sato et al. 1994), MMP15 (Butler et al. 1997, Morrison et al. 2001) and MMP16 (Takino et al. 1995). Residue numbering here refers to the UniProt canonical sequence.