MMP27 | |||||||||||||||||||||||||||||||||||||||||||||||||||
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Aliases | MMP27 , MMP-27, matrix metallopeptidase 27 | ||||||||||||||||||||||||||||||||||||||||||||||||||
External IDs | OMIM: 618101; MGI: 3039232; HomoloGene: 23345; GeneCards: MMP27; OMA:MMP27 - orthologs | ||||||||||||||||||||||||||||||||||||||||||||||||||
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Matrix metallopeptidase 27 also known as MMP-27 is an enzyme which in humans is encoded by the MMP27 gene. [5]
MMP-27 was discovered and cloned in 1998 by Yang and Kurkinen. [6] Initially compared to the so-called Chicken MMP (CMMP), MMP-27 actually shows very little sequence homology with this protease. Sequence homology predicts that the human MMP-27 gene encodes the canonical domains shared by most MMPs (annotation based on Uniprot entry Q9H306): (i) a signal peptide (residues 1-17), (ii) a propeptide (18-98) containing the cysteine switch motif (89-96), (iii) a catalytic domain (99-263) containing the typical HEXXHXXGXXH motif of the metzincins (M10 and M12 families of the MEROPS[2] database), (iv) a proline-rich hinge region (264-278) and (v) a hemopexin-like domain (279-465) folded as a four-bladed β-propeller through disulfide bond formation between the two flanking Cys residues (Cys279 and Cys465). MMP-27 could be classified in the stromelysin group of MMPs, since MMP-27 shows 51,6% homology with stromelysin-2 (MMP-10) and localizes in the cluster of MMPs located on chromosome 11.
Like the six known MT-MMPs, human MMP-27 is prolonged by an additional C-terminal domain (466-513). The Spoctopus algorithm for topological prediction [7] suggests that this C-terminal extension (CTE) includes a potential transmembrane domain (490-510). However, this sequence is less hydrophobic than in transmembrane MT-MMPs (MMP-14, -15, -16 and -24) as it contains hydrophilic/charged residues, in particular His492, Lys493, His504 and Lys507.
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 MMPs are secreted as inactive proproteins which are activated when cleaved by extracellular proteinases. [8]
Cominelli A. and colleagues demonstrated that MMP-27 is an unusual protease which is not secreted and is efficiently retained in the endoplasmic reticulum in three mammalian cell lines. [9] Deletion mutants and swapping with recombinant MMP-10 demonstrate that the unique MMP-27 C-terminal extension (CTE) is necessary and sufficient for endoplasmic reticulum retention but does not provide a stable membrane anchorage. Despite sequence homology with MT-MMPs, the CTE is not a transmembrane domain and does not interact permanently with membrane. This unique feature for an MMP raises important questions about potential functions of MMP-27, which remains to be investigated.
Sparse information about MMP-27 expression was found in studies of gene expression profiling (micro-array) or in expression pattern analysis of MMP family members during developmental, physiological or pathological processes. MMP-27 transcript is detected in almost every tissue, except the brain, with the highest expression found in the liver during mouse development [10] In the adult, MMP-27 mRNA is mostly abundant in anti-IgG/IgM stimulated B lymphocytes, [11] bone and kidney but is present at lower levels in the heart. [12]
A recent investigation of the transcriptome from distinct tissue compartments of the menstrual endometrium disclosed specific MMP-27 overexpression in areas of stromal breakdown. [13] In another transcriptomic study, MMP-27 was found to be increased in the human endometrium at the end of the secretory phase, before menstruation. [14] Moreover, MMP-27 expression is down-regulated in macrophages when co-cultured with ovarian cancer cells [15] but up-regulated in cartilages from patients with osteoarthritis [16] or in abdominal aortic aneurysms. [17] MMP-27 was also identified, at the protein level, in MDA-MB-231 breast cancer cell line [18] and in primary human breast cancer. [19] Recently, MMP-27 has been demonstrated to be expressed by CD163+/CD206+ macrophages in the human endometrium and in superficial endometriotic lesions. [20]
72 kDa type IV collagenase also known as matrix metalloproteinase-2 (MMP-2) and gelatinase A is an enzyme that in humans is encoded by the MMP2 gene. The MMP2 gene is located on chromosome 16 at position 12.2.
Interstitial collagenase, also known as fibroblast collagenase and matrix metalloproteinase-1 (MMP-1), is an enzyme that in humans is encoded by the MMP1 gene. The gene is part of a cluster of MMP genes which localize to chromosome 11q22.3. MMP-1 was the first vertebrate collagenase both purified to homogeneity as a protein, and cloned as a cDNA. MMP-1 has an estimated molecular mass of 54 kDa.
Tissue inhibitor of metalloproteinases 2 (TIMP2) is a gene and a corresponding protein. The gene is a member of the TIMP gene family. The protein is thought to be a metastasis suppressor.
Matrilysin also known as matrix metalloproteinase-7 (MMP-7), pump-1 protease (PUMP-1), or uterine metalloproteinase is an enzyme in humans that is encoded by the MMP7 gene. The enzyme has also been known as matrin, putative metalloproteinase-1, matrix metalloproteinase pump 1, PUMP-1 proteinase, PUMP, metalloproteinase pump-1, putative metalloproteinase, MMP). Human MMP-7 has a molecular weight around 30 kDa.
TIMP metallopeptidase inhibitor 1, also known as TIMP1, a tissue inhibitor of metalloproteinases, is a glycoprotein with a molecular weight of 28 kDa. TIMP1 is expressed from several tissues of organisms.
Collagenase 3 is an enzyme that in humans is encoded by the MMP13 gene. It is a member of the matrix metalloproteinase (MMP) family. Like most MMPs, it is secreted as an inactive pro-form. MMP-13 has a predicted molecular weight around 54 kDa. It is activated once the pro-domain is cleaved, leaving an active enzyme composed of the catalytic domain and the hemopexin-like domain PDB: 1PEX. Although the actual mechanism has not been described, the hemopexin domain participates in collagen degradation, the catalytic domain alone being particularly inefficient in collagen degradation. During embryonic development, MMP-13 is expressed in the skeleton as required for restructuring the collagen matrix for bone mineralization. In pathological situations it is highly overexpressed; this occurs in human carcinomas, rheumatoid arthritis and osteoarthritis.
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.
Matrix metalloproteinase-26 also known as matrilysin-2 and endometase is an enzyme that in humans is encoded by the MMP26 gene.
Matrix metalloproteinase-19 (MMP-19) also known as matrix metalloproteinase RASI is an enzyme that in humans is encoded by the MMP19 gene.
Stromelysin-3 (SL-3) also known as matrix metalloproteinase-11 (MMP-11) is an enzyme that in humans is encoded by the MMP11 gene.
Matrix metalloproteinase-16 is an enzyme that in humans is encoded by the MMP16 gene.
Metalloproteinase inhibitor 4 is an enzyme that in humans is encoded by the TIMP4 gene.
Periostin is a protein that in humans is encoded by the POSTN gene. Periostin functions as a ligand for alpha-V/beta-3 and alpha-V/beta-5 integrins to support adhesion and migration of epithelial cells.
Matrix metalloproteinase-17 (MMP-17) also known as membrane-type matrix metalloproteinase 4 is an enzyme that in humans is encoded by the MMP17 gene.
Matrix metalloproteinase 28 also known as epilysin is an enzyme that in humans is encoded by the MMP28 gene.
Matrix metalloproteinase-24 is an enzyme that in humans is encoded by the MMP24 gene.
Matrix metalloproteinase-20 (MMP-20) also known as enamel metalloproteinase or enamelysin is an enzyme that in humans is encoded by the MMP20 gene.
Neutrophil collagenase, also known as matrix metalloproteinase-8 (MMP-8) or PMNL collagenase (MNL-CL), is a collagen cleaving enzyme which is present in the connective tissue of most mammals. In humans, the MMP-8 protein is encoded by the MMP8 gene. The gene is part of a cluster of MMP genes which localize to chromosome 11q22.3. Most MMP's are secreted as inactive proproteins which are activated when cleaved by extracellular proteinases. However, the enzyme encoded by this gene is stored in secondary granules within neutrophils and is activated by autolytic cleavage.
Matrix metalloproteinase-21 (MMP-21) is an enzyme that in humans is encoded by the MMP21 gene.
Matrix metalloproteinase 15 also known as MMP15 is an enzyme that in humans is encoded by the MMP15 gene.
This article incorporates text from the United States National Library of Medicine, which is in the public domain.