MMP28

Matrix metalloproteinase 28 also known as epilysin is an enzyme that in humans is encoded by the MMP28 gene.

MMP28
Identifiers
Aliases	MMP28, EPILYSIN, MM28, MMP-25, MMP-28, MMP25, matrix metallopeptidase 28
External IDs	OMIM: 608417; MGI: 2153062; HomoloGene: 41559; GeneCards: MMP28; OMA:MMP28 - orthologs
Gene location (Human) Chr. Chromosome 17 (human) Band 17q12 Start 35,756,249 bp End 35,795,707 bp
Gene location (Mouse) Chr. Chromosome 11 (mouse) Band 11|11 C Start 83,331,594 bp End 83,353,897 bp
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in tibial nerve right testis left testis skin of abdomen transverse colon right lung upper lobe of left lung rectum mucosa of transverse colon skin of leg Top expressed in Paneth cell esophagus lip embryo stomach muscle of thigh brown adipose tissue transitional epithelium of urinary bladder ascending aorta aortic valve More reference expression data BioGPS More reference expression data
Gene ontology Molecular function peptidase activity hydrolase activity metallopeptidase activity metalloendopeptidase activity zinc ion binding metal ion binding protein binding Cellular component extracellular region cytoplasm extracellular matrix collagen-containing extracellular matrix extracellular space Biological process proteolysis negative regulation of macrophage chemotaxis extracellular matrix organization collagen catabolic process Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 79148 118453 Ensembl ENSG00000278843 ENSG00000271447 ENSMUSG00000020682 UniProt Q9H239 n/a RefSeq (mRNA) NM_001032278 NM_024302 NM_032950 NM_080453 NM_172797 NM_001320300 RefSeq (protein) NP_001027449 NP_077278 NP_116568 NP_116568.1 n/a Location (UCSC) Chr 17: 35.76 – 35.8 Mb Chr 11: 83.33 – 83.35 Mb PubMed search
Wikidata
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Function

Matrix metalloproteinase 28, also known as epilysin, belongs to a family of proteins known as matrix metalloproteinases which are common to tissue regulation. Matrix metalloproteinases are commonly known to degrade the extracellular matrix, alongside regulating cell surface receptors MMP-28 releases growth factors and adhesion molecules to modulate inflammation. MMP-28 is unique in that it can be found in many regular tissues, denoting a potential role in maintaining the healthy structure and function of most tissue. MMPs commonly modulate their expression via negative and positive feedback loops as a result of releasing and responding to growth hormones.

MMP-28 is less frequently found in tissues such as the brain, colon, heart, and lungs. However, MMP-28 is expressed heavily in organs such as the testes. Epilysin is also found in high concentration in basal keratinocytes in injured skin, even at some distance away from the wound, showing a role in repairing damaged tissue. MMP-28 also can alter the cell membrane to become more adhesive, and not allowing the cell to migrate.

Structure

MMP-28 is a 520 amino acid long protein. The estimated signal peptide sequence appears as a long tail of random coil coming off of the protein that helps to guide the protein to excretion with the sequence PRCGVTD. The zinc binding catalytic site is tucked within an alpha helix within the center of the protein with a HEIGHTLGLTH sequence at positions 240–250 with a hemopexin-like domain. Epilysin contains 8 exons, 5 of which are splice sites unique to MMP-28 and not used by any other metalloproteinase in the MMP family.

Epilysin contains 8 exons, 5 of which are splice sites unique to MMP-28 and not used by any other metalloproteinase in the MMP family.

The full amino acid sequence is listed on uniprot.

Clinical implications

The overexpression of MMP-28 is linked to the metastasis of tumors in cancer. Expression of MMP-28 can be linked to tumor diameter, depth of invasion, and stage of metastasis. In patients with positive overexpression of MMP-28, survival may be significantly less likely compared to negative expression of this protein, making it a potentially important marker for proactive prognosis of some forms of cancer.

MMP-28 may also play an important role in the breakdown of myelin, an important component of nervous system functionality. Demyelination may interrupt nerve signaling or even halt it completely, which can create severe neurological effects such as multiple sclerosis transverse myelitis and neuromyelitis optica.

Further reading

• Illman SA, Keski-Oja J, Lohi J (September 2001). "Promoter characterization of the human and mouse epilysin (MMP-28) genes". Gene. 275 (1): 185–194. doi:10.1016/S0378-1119(01)00664-3. PMID 11574168.
• Saarialho-Kere U, Kerkelä E, Jahkola T, Suomela S, Keski-Oja J, Lohi J (July 2002). "Epilysin (MMP-28) expression is associated with cell proliferation during epithelial repair". The Journal of Investigative Dermatology. 119 (1): 14–21. doi:10.1046/j.1523-1747.2002.01790.x. PMID 12164918.
• Strausberg RL, Feingold EA, Grouse LH, Derge JG, Klausner RD, Collins FS, et al. (December 2002). "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences". Proceedings of the National Academy of Sciences of the United States of America. 99 (26): 16899–16903. Bibcode:2002PNAS...9916899M. doi:10.1073/pnas.242603899. PMC 139241. PMID 12477932.
• Clark HF, Gurney AL, Abaya E, Baker K, Baldwin D, Brush J, et al. (October 2003). "The secreted protein discovery initiative (SPDI), a large-scale effort to identify novel human secreted and transmembrane proteins: a bioinformatics assessment". Genome Research. 13 (10): 2265–2270. doi:10.1101/gr.1293003. PMC 403697. PMID 12975309.
• Bar-Or A, Nuttall RK, Duddy M, Alter A, Kim HJ, Ifergan I, et al. (December 2003). "Analyses of all matrix metalloproteinase members in leukocytes emphasize monocytes as major inflammatory mediators in multiple sclerosis". Brain. 126 (Pt 12): 2738–2749. doi:10.1093/brain/awg285. PMID 14506071.
• Kevorkian L, Young DA, Darrah C, Donell ST, Shepstone L, Porter S, et al. (January 2004). "Expression profiling of metalloproteinases and their inhibitors in cartilage". Arthritis and Rheumatism. 50 (1): 131–141. doi:10.1002/art.11433. PMID 14730609.
• Bister VO, Salmela MT, Karjalainen-Lindsberg ML, Uria J, Lohi J, Puolakkainen P, et al. (April 2004). "Differential expression of three matrix metalloproteinases, MMP-19, MMP-26, and MMP-28, in normal and inflamed intestine and colon cancer". Digestive Diseases and Sciences. 49 (4): 653–661. doi:10.1023/B:DDAS.0000026314.12474.17. PMID 15185874. S2CID 34192223.
• Momohara S, Okamoto H, Komiya K, Ikari K, Takeuchi M, Tomatsu T, Kamatani N (December 2004). "Matrix metalloproteinase 28/epilysin expression in cartilage from patients with rheumatoid arthritis and osteoarthritis: comment on the article by Kevorkian et al". Arthritis and Rheumatism. 50 (12): 4074–5, author reply 4075. doi:10.1002/art.20799. PMID 15593191.
• Renò F, Sabbatini M, Stella M, Magliacani G, Cannas M (2005). "Effect of in vitro mechanical compression on Epilysin (matrix metalloproteinase-28) expression in hypertrophic scars". Wound Repair and Regeneration. 13 (3): 255–261. doi:10.1111/j.1067-1927.2005.130307.x. PMID 15953044. S2CID 24640193.

External links

• The MEROPS online database for peptidases and their inhibitors: M10.030