Matrix metallopeptidase 12

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
macrophage elastase
EC number
CAS number 146888-86-0
IntEnz IntEnz view
ExPASy NiceZyme view
MetaCyc metabolic pathway
PRIAM profile
PDB structures RCSB PDB PDBe PDBsum
Gene Ontology AmiGO / QuickGO
Protein MMP12 PDB 1jiz.png
Available structures
PDB Ortholog search: PDBe RCSB
Aliases MMP12, HME, ME, MME, MMP-12, Matrix metallopeptidase 12
External IDs MGI: 97005 HomoloGene: 20547 GeneCards: MMP12
Gene location (Human)
Chromosome 11 (human)
Chr. Chromosome 11 (human)[1]
Chromosome 11 (human)
Genomic location for MMP12
Genomic location for MMP12
Band 11q22.2 Start 102,862,736 bp[1]
End 102,875,034 bp[1]
RNA expression pattern
PBB GE MMP12 204580 at fs.png
More reference expression data
Species Human Mouse
RefSeq (mRNA)



RefSeq (protein)



Location (UCSC) Chr 11: 102.86 – 102.88 Mb Chr 9: 7.34 – 7.37 Mb
PubMed search [3] [4]
View/Edit Human View/Edit Mouse

Matrix metalloproteinase-12 (MMP-12) also known as macrophage metalloelastase (MME) or macrophage elastase (ME) is an enzyme that in humans is encoded by the MMP12 gene.[5][6][7]


Proteins of the matrix metalloproteinase (MMP) family are involved in the breakdown of extracellular matrix in normal physiological processes, such as embryonic development, reproduction, and tissue remodeling, as well as in disease processes, such as arthritis and metastasis. Most MMP's are secreted as inactive proproteins. The prodomain is cleaved by extracellular proteinases when the enzyme is activated. The active enzyme is constituted by two domains, the catalytic domain resposnsible for its enzymatic activity and the hemopexin-like domain that in some MMPs plays a role in substrate recognition and can contribute to increasing catalytic efficiency. It is thought that the protein encoded by this gene is cleaved at both ends to yield the active enzyme, but this processing has not been fully described. The enzyme degrades soluble and insoluble elastin. The gene is part of a cluster of MMP genes which localize to chromosome 11q22.3.[5]

Clinical significance[edit]

MMP12 may play a role in aneurysm formation[8] and studies in mice and humans suggest a role in the development of emphysema.[9]


  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000262406 - Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000049723 - Ensembl, May 2017
  3. ^ "Human PubMed Reference:". 
  4. ^ "Mouse PubMed Reference:". 
  5. ^ a b "Entrez Gene: MMP12 matrix metallopeptidase 12 (macrophage elastase)". 
  6. ^ Shapiro SD, Kobayashi DK, Ley TJ (November 1993). "Cloning and characterization of a unique elastolytic metalloproteinase produced by human alveolar macrophages". J. Biol. Chem. 268 (32): 23824–9. PMID 8226919. 
  7. ^ Belaaouaj A, Shipley JM, Kobayashi DK, Zimonjic DB, Popescu N, Silverman GA, Shapiro SD (June 1995). "Human macrophage metalloelastase. Genomic organization, chromosomal location, gene linkage, and tissue-specific expression". J. Biol. Chem. 270 (24): 14568–75. doi:10.1074/jbc.270.24.14568. PMID 7782320. 
  8. ^ Curci JA, Liao S, Huffman MD, Shapiro SD, Thompson RW (December 1998). "Expression and localization of macrophage elastase (matrix metalloproteinase-12) in abdominal aortic aneurysms". J. Clin. Invest. 102 (11): 1900–10. doi:10.1172/JCI2182. PMC 509141Freely accessible. PMID 9835614. 
  9. ^ Woodruff PG, Koth LL, Yang YH, Rodriguez MW, Favoreto S, Dolganov GM, Paquet AC, Erle DJ (December 2005). "A Distinctive Alveolar Macrophage Activation State Induced by Cigarette Smoking". Am. J. Respir. Crit. Care Med. 172 (11): 1383–92. doi:10.1164/rccm.200505-686OC. PMC 2718436Freely accessible. PMID 16166618. 

Further reading[edit]

External links[edit]

  • The MEROPS online database for peptidases and their inhibitors: M10.009