|
1
|
Cerofolini L, Amar S, Lauer JL, Martelli T, Fragai M, Luchinat C, Fields GB. Bilayer Membrane Modulation of Membrane Type 1 Matrix Metalloproteinase (MT1-MMP) Structure and Proteolytic Activity. Sci Rep 2016; 6:29511. [PMID: 27405411 PMCID: PMC4942797 DOI: 10.1038/srep29511] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Accepted: 06/20/2016] [Indexed: 11/23/2022] Open
Abstract
Cell surface proteolysis is an integral yet poorly understood physiological process. The present study has examined how the pericellular collagenase membrane-type 1 matrix metalloproteinase (MT1-MMP) and membrane-mimicking environments interplay in substrate binding and processing. NMR derived structural models indicate that MT1-MMP transiently associates with bicelles and cells through distinct residues in blades III and IV of its hemopexin-like domain, while binding of collagen-like triple-helices occurs within blades I and II of this domain. Examination of simultaneous membrane interaction and triple-helix binding revealed a possible regulation of proteolysis due to steric effects of the membrane. At bicelle concentrations of 1%, enzymatic activity towards triple-helices was increased 1.5-fold. A single mutation in the putative membrane interaction region of MT1-MMP (Ser466Pro) resulted in lower enzyme activation by bicelles. An initial structural framework has thus been developed to define the role(s) of cell membranes in modulating proteolysis.
Collapse
Affiliation(s)
- Linda Cerofolini
- Giotto Biotech S.R.L., Via Madonna del Piano 6, 50019 Sesto Fiorentino (FI), Italy
| | - Sabrina Amar
- Department of Chemistry &Biochemistry, Florida Atlantic University, 5353 Parkside Drive, Jupiter, FL 33458, USA
| | - Janelle L Lauer
- Max Planck Institute of Molecular Cell Biology and Genetics, Pfotenhauerstrasse 108, 01307, Dresden, Germany
| | - Tommaso Martelli
- CERM, University of Florence, Via Luigi Sacconi 6, 50019, Sesto Fiorentino (FI), Italy.,Department of Chemistry "U. Schiff", University of Florence, via della Lastruccia 3, 50019, Sesto Fiorentino (FI), Italy
| | - Marco Fragai
- CERM, University of Florence, Via Luigi Sacconi 6, 50019, Sesto Fiorentino (FI), Italy.,Department of Chemistry "U. Schiff", University of Florence, via della Lastruccia 3, 50019, Sesto Fiorentino (FI), Italy
| | - Claudio Luchinat
- CERM, University of Florence, Via Luigi Sacconi 6, 50019, Sesto Fiorentino (FI), Italy.,Department of Chemistry "U. Schiff", University of Florence, via della Lastruccia 3, 50019, Sesto Fiorentino (FI), Italy
| | - Gregg B Fields
- Department of Chemistry &Biochemistry, Florida Atlantic University, 5353 Parkside Drive, Jupiter, FL 33458, USA.,Department of Chemistry, The Scripps Research Institute/Scripps Florida, 130 Scripps Way, Jupiter, FL 33458, USA.,Departments of Chemistry and Biology, Torrey Pines Institute for Molecular Studies, 33458, Port St. Lucie, FL 34987, USA
| |
Collapse
|