laminin subunit alpha 3
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L LAMA3 gene provides instructions for making one part (subunit) of a protein called laminin 332 (formerly known as laminin 5). This protein is made up of three subunits, called alpha, beta, and gamma. The LAMA3 gene carries instructions for the alpha subunit; the beta and gamma subunits are produced from other genes. Three versions of the alpha subunit, called alpha-3a, alpha-3b1, and alpha-3b2, are produced from the LAMA3 gene.
Normal function
L LAMA3 gene provides instructions for making one part (subunit) of a protein called laminin 332 (formerly known as laminin 5). This protein is made up of three subunits, called alpha, beta, and gamma. The LAMA3 gene carries instructions for the alpha subunit; the beta and gamma subunits are produced from other genes. Three versions of the alpha subunit, called alpha-3a, alpha-3b1, and alpha-3b2, are produced from the LAMA3 gene.
Laminins are a group of proteins that regulate cell growth, cell movement (motility), and the attachment of cells to one another (adhesion). They are also involved in the formation and organisation of basement membranes, which are thin, sheet-like structures that separate and support cells in many tissues. Laminin 332 has a particularly important role in the basement membrane that underlies the top layer of skin (the epidermis). This membrane gives strength and resiliency to the skin and creates an additional barrier between the body and its surrounding environment. Laminin 332 is a major component of fibers called anchoring filaments, which connect the two layers of the basement membrane and help hold the skin together.
Studies suggest that laminin 332 also has several other functions. This protein appears to be important in the formation of early wound-healing tissues. Additionally, researchers have proposed roles for laminin 332 in the clear outer covering of the eye (the cornea) and in the development of tooth enamel.
The alpha subunit produced from the LAMA3 gene is also part of two other laminin proteins, laminin 311 and laminin 321. These laminins also appear to provide strength to the skin, although they do not play as big a role as laminin 332. In addition, laminin 311 is involved in cell signaling in the lungs and other tissues.
Conditions referring to this gene or chromosome
Altri nomi
BM600
BM600 150kD subunit
BM600-150kDa
E170
epiligrin
epiligrin 170 kda subunit
epiligrin alpha 3 subunit
kalinin 165kD subunit
kalinin-165kDa
LAM5, alpha-3 subunit
LAMA3_HUMAN
lama3a
laminin 5, alpha-3 subunit
laminin A3
laminin alpha 3
laminin alpha 3 subunit
laminin, alpha 3
laminin, alpha-3
laminin-5 alpha 3 chain
LAMNA
LOCS
nicein 150kD subunit
nicein-150kDa
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Ulteriori letture e riferimenti
- laminin subunit alpha 3; MedlinePlus, National Library of Medicine.
- Aumailley M, Bruckner-Tuderman L, Carter WG, Deutzmann R, Edgar D, Ekblom P, Engel J, Engvall E, Hohenester E, Jones JC, Kleinman HK, Marinkovich MP, Martin GR, Mayer U, Meneguzzi G, Miner JH, Miyazaki K, Patarroyo M, Paulsson M, Quaranta V, Sanes JR, Sasaki T, Sekiguchi K, Sorokin LM, Talts JF, Tryggvason K, Uitto J, Virtanen I, von der Mark K, Wewer UM, Yamada Y, Yurchenco PD. A simplified laminin nomenclature. Matrix Biol. 2005 Aug;24(5):326-32. doi: 10.1016/j.matbio.2005.05.006.
- Barzegar M, Mozafari N, Kariminejad A, Asadikani Z, Ozoemena L, McGrath JA. A new homozygous nonsense mutation in LAMA3A underlying laryngo-onycho-cutaneous syndrome. Br J Dermatol. 2013 Dec;169(6):1353-6. doi: 10.1111/bjd.12522.
- Hamill KJ, McLean WH. The alpha-3 polypeptide chain of laminin 5: insight into wound healing responses from the study of genodermatoses. Clin Exp Dermatol. 2005 Jul;30(4):398-404. doi: 10.1111/j.1365-2230.2005.01842.x.
- Hamill KJ, Paller AS, Jones JC. Adhesion and migration, the diverse functions of the laminin alpha3 subunit. Dermatol Clin. 2010 Jan;28(1):79-87. doi: 10.1016/j.det.2009.10.009.
- Hartwig B, Borm B, Schneider H, Arin MJ, Kirfel G, Herzog V. Laminin-5-deficient human keratinocytes: defective adhesion results in a saltatory and inefficient mode of migration. Exp Cell Res. 2007 May 1;313(8):1575-87. doi: 10.1016/j.yexcr.2007.02.003. Epub 2007 Feb 9.
- Kim CC, Liang MG, Pfendner E, Kimonis VE. What syndrome is this? Laryngo-onycho-cutaneous syndrome. Pediatr Dermatol. 2007 May-Jun;24(3):306-8. doi: 10.1111/j.1525-1470.2007.00408.x. No abstract available.
- McLean WH, Irvine AD, Hamill KJ, Whittock NV, Coleman-Campbell CM, Mellerio JE, Ashton GS, Dopping-Hepenstal PJ, Eady RA, Jamil T, Phillips R, Shabbir SG, Haroon TS, Khurshid K, Moore JE, Page B, Darling J, Atherton DJ, Van Steensel MA, Munro CS, Smith FJ, McGrath JA. An unusual N-terminal deletion of the laminin alpha3a isoform leads to the chronic granulation tissue disorder laryngo-onycho-cutaneous syndrome. Hum Mol Genet. 2003 Sep 15;12(18):2395-409. doi: 10.1093/hmg/ddg234. Epub 2003 Jul 15.
- Nakano A, Chao SC, Pulkkinen L, Murrell D, Bruckner-Tuderman L, Pfendner E, Uitto J. Laminin 5 mutations in junctional epidermolysis bullosa: molecular basis of Herlitz vs. non-Herlitz phenotypes. Hum Genet. 2002 Jan;110(1):41-51. doi: 10.1007/s00439-001-0630-1. Epub 2001 Nov 13.
- Schneider H, Muhle C, Pacho F. Biological function of laminin-5 and pathogenic impact of its deficiency. Eur J Cell Biol. 2007 Dec;86(11-12):701-17. doi: 10.1016/j.ejcb.2006.07.004. Epub 2006 Sep 26.
- Varki R, Sadowski S, Pfendner E, Uitto J. Epidermolysis bullosa. I. Molecular genetics of the junctional and hemidesmosomal variants. J Med Genet. 2006 Aug;43(8):641-52. doi: 10.1136/jmg.2005.039685. Epub 2006 Feb 10.
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