NDLI: Molecular cloning of murine 72-kDa type IV collagenase and its expression during mouse development.

Content Provider	Journal of Biological Chemistry (JBC)
Author	Reponen, P. Sahlberg, C. Huhtala, P. Hurskainen, T. Thesleff, I. Tryggvason, K.
Abstract	We report the isolation of a cDNA clone providing the first and complete sequence of mouse 72-kDa type IV collagenase. The clone contains 2800 nucleotides with a 1986-nucleotide open reading frame coding for 662 amino acids. The amino acid sequence includes a 29-residue signal peptide, an 80-residue propeptide, and a 553-residue enzyme proper. The sequence identity between the mouse and human enzymes is 96% with all cysteine residues conserved. The carboxyl-terminal domain of the mouse enzyme contains two more residues than the human enzyme. Northern hybridization analysis revealed considerable expression of the enzyme gene in newborn mouse lung, heart, kidney, and psoas muscle tissues, whereas only weak or no signals were observed in liver, spleen, and brain. Expression of the gene was substantially reduced in the same tissues of 3-month-old mice. In situ hybridization analysis of 72-kDa type IV collagenase expression in 10-15-day-old mouse embryos showed that the gene was intensely expressed in mesenchymal cells. Brain and surface ectoderm were completely negative. The epithelial tissue component of developing organs was negative with the exception of salivary gland. Although the expression varied somewhat between different mesenchymal tissues, no temporal or spatial changes could be associated with the advancement of epithelial branching morphogenesis. These findings together with our previous data on the expression of 72-kDa type IV collagenase in human tumors indicate that this enzyme has some very specific roles both in the physiological and pathological degradation of extracellular matrix. Furthermore, it has become clear that the closely related 92-kDa type IV collagenase differs completely with respect to expression pattern as well as gene regulation. The mouse cDNA clones reported in this study may provide important tools unraveling the actual roles of these enzymes in vivo.
Related Links	http://www.jbc.org/content/267/11/7856.abstract
Ending Page	7862
Starting Page	7856
Page Count	7
File Format	HTM / HTML PDF
ISSN	00219258
Journal	Journal of Biological Chemistry (JBC)
Issue Number	11
Volume Number	267
e-ISSN	1083351X
Language	English
Publisher	American Society for Biochemistry and Molecular Biology
Publisher Date	1992-04-15
Access Restriction	Open
Content Type	Text
Resource Type	Article
Subject	Cell Biology Biochemistry Molecular Biology

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