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Mmp14 is essential for circadian clock rhythmicity in fibroblasts

ABSTRACT: Membrane type I-matrix metalloproteinase (MT1-MMP/Mmp14) is an unusual MMP because it is essential for survival in mice with multiple organ systems being affected for reasons that are unclear. Here, we show that the protein (MT1-MMP) and gene (Mmp14) are under strict circadian clock control and conditional knockout in fibroblasts leads to ~16% of the proteome losing or inverting circadian rhythmicity. The result is loss of the actin cytoskeleton and cell-matrix adhesions and major imbalance of the matrisome. Lack of collagen-I monomer turnover results in excess fibril formation in the absence of Mmp14. In the absence of Mmp14, paired-like homeodomain transcription factor 2 (Pitx2) is upregulated and remains in the nucleus where it drives Plod2 expression. The overall result is accumulation of collagen fibrils and elevated pyridinoline crosslinking that renders collagen fibrils insoluble. In conclusion, Mmp14 is a master regulator of circadian rhythms affecting the actin cytoskeleton and cell microenvironment.

INSTRUMENT(S): Q Exactive HF

ORGANISM(S): Mus Musculus (mouse)

TISSUE(S): Tendon

SUBMITTER: Venkatesh Mallikarjun

LAB HEAD: Karl E. Kadler

PROVIDER: PXD031692 | Pride | 2023-10-31

REPOSITORIES: Pride

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Project description:This a model from the article: A theoretical model of type I collagen proteolysis by matrix metalloproteinase (MMP) 2 and membrane type 1 MMP in the presence of tissue inhibitor of metalloproteinase 2. Karagiannis ED, Popel AS. J Biol Chem 2004 Sep 10;279(37):39105-14 15252025 , Abstract: One well documented family of enzymes responsible for the proteolytic processes that occur in the extracellular matrix is the soluble and membrane-associated matrix metalloproteinases. Here we present the first theoretical model of the biochemical network describing the proteolysis of collagen I by matrix metalloproteinases 2 (MMP2) and membrane type 1 matrix metalloproteinases (MT1-MMP) in the presence of the tissue inhibitor of metalloproteinases 2 (TIMP2) in a bulk, cell-free, well stirred environment. The model can serve as a tool for describing quantitatively the activation of the MMP2 proenzyme (pro-MMP2), the ectodomain shedding of MT1-MMP, and the collagenolysis arising from both of the enzymes. We show that pro-MMP2 activation, a process that involves a trimer formation of the proenzyme with TIMP2 and MT1-MMP, is suppressed at high inhibitor levels and paradoxically attains maximum only at intermediate TIMP2 concentrations. We also calculate the conditions for which pro-MMP2 activation is maximal. Furthermore we demonstrate that the ectodomain shedding of MT1-MMP can serve as a mechanism controlling the MT1-MMP availability and therefore the pro-MMP2 activation. Finally the proteolytic synergism of MMP2 and MT1-MMP is introduced and described quantitatively. The model provides us a tool to determine the conditions under which the synergism is optimized. Our approach is the first step toward a more complete description of the proteolytic processes that occur in the extracellular matrix and include a wider spectrum of enzymes and substrates as well as naturally occurring or artificial inhibitors. This model was taken from the CellML repository and automatically converted to SBML. The original model was: Karagiannis ED, Popel AS. (2004) - version01 This model originates from BioModels Database: A Database of Annotated Published Models (http://www.ebi.ac.uk/biomodels/). It is copyright (c) 2005-2011 The BioModels.net Team. To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information. In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.. To cite BioModels Database, please use: Li C, Donizelli M, Rodriguez N, Dharuri H, Endler L, Chelliah V, Li L, He E, Henry A, Stefan MI, Snoep JL, Hucka M, Le Novère N, Laibe C (2010) BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models. BMC Syst Biol., 4:92.

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Mmp14 is essential for circadian clock rhythmicity in fibroblasts

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