CMca-Pro-Leu: Concentration of Mca-Pro-Leu used for calibration of the fluorimeter (µmoles/ml).FMca-Pro-Leu: Fluorescence of Mca-Pro-Leu at the concentration CMca-Pro-Leu used for fluorimeter calibration.ΔFMca-Pro-Leu-Gly-Leu-Dpa-Ala-Arg: Change in fluorescence during peptide hydrolysis per min.Vtotal: Volume of peptide hydrolysis reaction (2.5ml).Venzyme: Volume of added enzyme (0.002 to 0.004ml).Due to autoproteolytic activity minor bands of activated enzyme may be visible in the preparation.Swiss-Prot link P50281: MMP-14 (human) (precursor)AfCS Signalling Gateway link A001466: MMP-14 (mouse)
Preparation and stability of solutionsPeptide hydrolysis buffer: 50mM Tris-HCl, pH 7.5, 150mM NaCl, 5mM CaCl2, 0.025% Brij 35.Solution is stable for several weeks at 4°C.Stock solution of peptide substrate: 100mM solution of Mca-Pro-Leu-Gly-Leu-Dpa-Ala-Arg in 20% dimethylsulfoxide. Store solution at -20°C.Stock solution of unquenched peptide: 10mM solution of (7-methoxycoumarin-4-yl)acetyl-Pro-Leu-NH2 (Mca-Pro-Leu) in 20% dimethylsulfoxide. Store solution at -20°C.Assay protocol The activity of MT1-MMP catalytic domain is measured fluorimetrically with a synthetic internally quenched fluorescent substrate according to Knight et al. [1].An excitation wavelength of 328nm and an emission wavelength of 393nm are set in an appropriate fluorimeter. The instrument is calibrated with the unquenched peptide Mca-Pro-Leu at a concentration corresponding to between 2 and 10% hydrolysis of the protease substrate. Kinetic reactions are conveniently carried out in a constant volume of 2.5ml. The substrate Mca-Pro-Leu-Gly-Leu-Dpa-Ala-Arg is diluted in peptide hydrolysis buffer to a concentration of 0.8µM and equilibrated at a temperature of 37°C. Aliquots of 2 to 4µl of matrix metalloproteinase are than added and the increase in fluorescence is recorded over a time interval between 2 and 12 min. Activity units per ml enzyme solution are calculated according to the following equation:
Activity U/ml = (cMca-Pro-Leu/FMca-Pro-Leu) x (ΔFMca-Pro-Leu-Gly-Leu-Dpa-Ala-Arg/venzyme) x Vtotal
cMca-Pro-Leu : Concentration of Mca-Pro-Leu used for calibration of the fluorimeter (mmoles/ml) FMca-Pro-Leu : Fluorescence of Mca-Pro-Leu at the concentration c Mca-Pro-Leu used for fluorimeter calibration ΔFMca-Pro-Leu-Gly-Leu-Dpa-Ala-Arg: Change in fluorescence during peptide hydrolysis per min V : Volume of peptide hydrolysis reaction (2.5 ml) v : Volume of added enzyme (0.002 ml to 0.004 ml)SequenceY89 A I Q G L K W Q H N E I T F C I Q N Y T P K V G E Y A T Y E A I R K A F R V W E S A T P L R F R E V P Y A Y I R E G H E K Q A D I M I F F A E G F H G D S T P F D G E G G F L A H A Y F P G P N I G G D T H F D S A E P W T V R N E D L N G N D I F L V A V H E L G H A L G L E H S S D P S A I M A P F Y Q W M D T E N F V L P D D D R R G I Q Q L Y G G E S G265InhibitorsThe catalytic domain of MMP-14 is inhibited by tissue inhibitors of MMP-2 and -3 (TIMP-2 and TIMP-3) and by chelators of divalent cations like EDTA or o-phenanthroline.
Swiss-Prot link P50281: MMP-14 (human) (precursor)AfCS Signalling Gateway link A001466: MMP-14 (mouse)
Measurement of catalytic activity
1 Preparation and stability of solutions:· Peptide hydrolysis buffer: 50mM TRIS-HCl, pH 7.5, 150mM NaCl, 5mM CaCl2, 0.025% Brij 35. Solution is stable for several weeks at 4°C.· Stock solution of peptide substrate: 100µM solution of Mca-Pro-Leu-Gly-Leu-Dpa-Ala-Arg in 20% DMSO. Store at -20°C.· Stock solution of unquenched peptide: 10µM solution of (7-methoxycoumarin-4-yl)acetyl-Pro-Leu-NH2 (Mca-Pro-Leu) in 20% DMSO. Store at -20°C.
2 Assay protocol:The activity of MMP-15 is measured fluorimetrically with a synthetic internally quenched fluorescent substrate according to Knight et al.An excitation wavelength of 328nm and an emission wavelength of 393nm are set in an appropriate fluorimeter. The instrument is calibrated with the unquenched peptide Mca-Pro-Leu at a concentration corresponding to between 2 and 10% hydrolysis of the protease substrate. Kinetic reactions are conveniently carried out in a constant volume of 2.5ml. The substrate Mca-Pro-Leu-Gly-Leu-Dpa-Ala-Arg is diluted in peptide hydrolysis buffer to a concentration of 0.8µM and equilibrated at a temperature of 37°C. Aliquots of 2 to 4µl of the activation mixture are than added and the increase in fluorescence is recorded over a time interval between 2 and 12 minutes. Activity units per ml enzyme solution are calculated according to the following equation:
Activity (U/ml) = (CMca-Pro-Leu/FMca-Pro-Leu) x (ΔFMca-Pro-Leu-Gly-Leu-Dpa-Ala-Arg/Venzyme) x VtotalCMca-Pro-Leu: Concentration of Mca-Pro-Leu used for calibration of the fluorimeter (µmoles/ml).FMca-Pro-Leu: Fluorescence of Mca-Pro-Leu at the concentration CMca-Pro-Leu used for fluorimeter calibration.ΔFMca-Pro-Leu-Gly-Leu-Dpa-Ala-Arg: Change in fluorescence during peptide hydrolysis per min.Vtotal: Volume of peptide hydrolysis reaction (2.5ml).Venzyme: Volume of added enzyme (0.002 to 0.004ml).3 Inhibitors:The catalytic domain of MMP-15 is inhibited by tissue inhibitors of MMP-2 and -3 (TIMP-2 and TIMP-3) and by chelators of divalent cations like EDTA or o-phenanthroline.Swiss-Prot link P51511: MMP-15 (human) (precursor)AfCS Signalling Gateway link A001467: MMP-15 (mouse)
2 Assay protocol:The activity of MMP-16 is measured fluorimetrically with a synthetic internally quenched fluorescent substrate according to Knight et al.An excitation wavelength of 328nm and an emission wavelength of 393nm are set in an appropriate fluorimeter. The instrument is calibrated with the unquenched peptide Mca-Pro-Leu at a concentration corresponding to between 2 and 10% hydrolysis of the protease substrate. Kinetic reactions are conveniently carried out in a constant volume of 2.5ml. The substrate Mca-Pro-Leu-Gly-Leu-Dpa-Ala-Arg is diluted in peptide hydrolysis buffer to a concentration of 0.8µM and equilibrated at a temperature of 37°C. Aliquots of 2 to 4µl of the activation mixture are than added and the increase in fluorescence is recorded over a time interval between 2 and 12 minutes. Activity units per ml enzyme solution are calculated according to the following equation:
Activity (U/ml) = (ΔFMca-Pro-Leu-Gly-Leu-Dpa-Ala-Arg x CMca-Pro-Leu x Vtotal) / (1000 x FMca-Pro-Leu x Venzyme)CMca-Pro-Leu: Concentration of Mca-Pro-Leu used for calibration of the fluorimeter (µmoles/ml).FMca-Pro-Leu: Fluorescence of Mca-Pro-Leu at the concentration CMca-Pro-Leu used for fluorimeter calibration.ΔFMca-Pro-Leu-Gly-Leu-Dpa-Ala-Arg: Change in fluorescence during peptide hydrolysis per min.Vtotal: Volume of peptide hydrolysis reaction (2.5ml).Venzyme: Volume of added enzyme (0.002 to 0.004ml).
3 Inhibitors:The catalytic domain of MMP-16 is inhibited by tissue inhibitors of MMP-2 (TIMP-2) and by chelators of divalent cations like EDTA or o-phenanthroline.
Swiss-Prot link P51512: MMP-16 (human) (precursor)AfCS Siganlling Gateway link A001468: MMP-16 (mouse)
2 Assay protocol:The activity of MMP-17 is measured fluorimetrically with a synthetic internally quenched fluorescent substrate according to Knight et al.An excitation wavelength of 328nm and an emission wavelength of 393nm are set in an appropriate fluorimeter. The instrument is calibrated with the unquenched peptide Mca-Pro-Leu at a concentration corresponding to between 2 and 10% hydrolysis of the protease substrate (0.016-0.08μM). Kinetic reactions are conveniently carried out in a constant volume of 2.5ml. The substrate Mca-Pro-Leu-Gly-Leu-Dpa-Ala-Arg is diluted in peptide hydrolysis buffer to a concentration of 0.8µM and equilibrated at a temperature of 37°C. Aliquots of 8 to 10µl of the activation mixture are than added and the increase in fluorescence is recorded over a time interval between 2 and 15 minutes. Activity units per ml enzyme solution are calculated according to the following equation:
Activity (U/ml) = (CMca-Pro-Leu/FMca-Pro-Leu) x (ΔFMca-Pro-Leu-Gly-Leu-Dpa-Ala-Arg/Venzyme) x VtotalCMca-Pro-Leu: Concentration of Mca-Pro-Leu used for calibration of the fluorimeter (µmoles/ml).FMca-Pro-Leu: Fluorescence of Mca-Pro-Leu at the concentration CMca-Pro-Leu used for fluorimeter calibration.ΔFMca-Pro-Leu-Gly-Leu-Dpa-Ala-Arg: Change in fluorescence during peptide hydrolysis per min.Vtotal: Volume of peptide hydrolysis reaction (2.5ml).Venzyme: Volume of added enzyme (0.002 to 0.004ml).
3 Inhibitors:The catalytic domain of MMP-17 is inhibited by tissue inhibitors of MMP-1 (TIMP-1) and by chelators of divalent cations like EDTA.
Swiss-Prot link Q9ULZ9: MMP-17 (human) (precursor)AfCS Signalling Gateway link A001469: MMP-17 (mouse)
2 Assay protocol:The activity of MMP-24 is measured fluorimetrically with a synthetic internally quenched fluorescent substrate according to Knight et al.An excitation wavelength of 328nm and an emission wavelength of 393nm are set in an appropriate fluorimeter. The instrument is calibrated with the unquenched peptide Mca-Pro-Leu at a concentration corresponding to between 2 and 10% hydrolysis of the protease substrate. Kinetic reactions are conveniently carried out in a constant volume of 2.5ml. The substrate Mca-Pro-Leu-Gly-Leu-Dpa-Ala-Arg is diluted in peptide hydrolysis buffer to a concentration of 0.8µM and equilibrated at a temperature of 37°C. Aliquots of 2 to 4µl of the activation mixture are than added and the increase in fluorescence is recorded over a time interval between 2 and 12 minutes. Activity units per ml enzyme solution are calculated according to the following equation:
Activity (U/ml) = (CMca-Pro-Leu/FMca-Pro-Leu) x (ΔFMca-Pro-Leu-Gly-Leu-Dpa-Ala-Arg/Venzyme) x VtotalCMca-Pro-Leu: Concentration of Mca-Pro-Leu used for calibration of the fluorimeter (µmoles/ml).FMca-Pro-Leu: Fluorescence of Mca-Pro-Leu at the concentration CMca-Pro-Leu used for fluorimeter calibration.ΔFMca-Pro-Leu-Gly-Leu-Dpa-Ala-Arg: Change in fluorescence during peptide hydrolysis per min.Vtotal: Volume of peptide hydrolysis reaction (2.5ml).Venzyme: Volume of added enzyme (0.002 to 0.004ml).3 Inhibitors:The catalytic domain of MMP-24 is inhibited by tissue inhibitors of MMP-2 (TIMP-2) and by chelators of divalent cations like EDTA or o-phenanthroline.
Swiss-Prot link Q9Y5R2: MMP-24 (human) (precursor)AfCS Signalling Gateway link A001474: MMP-24 (mouse)