Abstract
Herein, synthesis of a Dnp-labeled peptide, Dnp-Pro-Gln-Gly-Ile-Ala-Gly-Gln-D-Arg-CONH2, is described by the Fmoc solid-phase method. Post-synthesis of the peptide was purified by reversed-phase HPLC. The purity of the peptide was determined by nuclear magnetic resonance total correlation spectroscopy (NMR TOCSY), and the validity of the peptide as a specific synthetic substrate for matrix metalloproteinase-2 (MMP-2) was also assessed by measuring the specific activities of the MMP-2 using the peptide as a substrate. It was found to be a suitable substrate with respect to MMP-2 and correlated well with the [14C]-gelatin degradation assay of MMP-2. Pretreatment of the pure MMP-2 with tissue inhibitor of metalloproteinase-2 (TIMP-2), a specific endogenous inhibitor of MMP-2, prevented both the Dnp-labeled peptide substrate degradation and the [14C]-gelatin degradation. Thus, the Dnp-labeled peptide can be used as a synthetic substrate for in vitro assay of MMP-2.
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Abbreviations
- APMA:
-
Aminophenylmercuric acetate
- DIPEA:
-
Diisopropylethylamine
- DMF:
-
Dimethylformamide
- Dnp:
-
2,4-Dinitorophenyl
- Fmoc:
-
Fluorenylmethyloxycarbonyl
- HOBt:
-
1-Hydroxybenzotriazole
- HPLC:
-
High-performance liquid chromatography
- MBHA resin:
-
4-Methylbenzhydrylamine resin
- MMP-2:
-
Matrix metalloproteinase-2
- NMR:
-
Nuclear magnetic resonance
- OPfp ester:
-
Pentaflurophenyl ester
- PyBOP:
-
(Benzotriazol-1-yloxy)tris(pyrrolidino)phosphoniumhexafluorophosphate
- TFA:
-
Trifluoroacetic acid
- TIMP-2:
-
Tissue inhibitor of metalloproteinase-2
- TNBS:
-
Trinitrobenzenesulfonic acid
- TOCSY:
-
Total correlation spectroscopy
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Acknowledgments
Financial assistance from the Department of Biotechnology (DBT) (Government of India); the Council of Scientific and Industrial Research (CSIR), New Delhi; and the Indian Council of Medical Research (ICMR), New Delhi, is gratefully acknowledged. Thanks are due to Dr. Sudip Das (Department of Biochemistry and Biophysics, University of Kalyani, Kalyani, West Bengal, India) and Mr. Smriti Ranjan Maji (Bose Institute, Kolkata, West Bengal, India) for their expert technical help in this work.
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Mandal, A., Maiti, A., Chakraborti, T., Chakraborti, S. (2017). Solid Support Synthesis of a Dnp-Labeled Peptide for Assay of Matrix Metalloproteinase-2. In: Chakraborti, S., Dhalla, N. (eds) Proteases in Physiology and Pathology. Springer, Singapore. https://doi.org/10.1007/978-981-10-2513-6_28
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DOI: https://doi.org/10.1007/978-981-10-2513-6_28
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