fibrillin 1
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The FBN1 gene provides instructions for making a large protein called fibrillin-1. This protein is transported out of cells into the extracellular matrix, which is an intricate lattice of proteins and other molecules that forms in the spaces between cells. In the extracellular matrix, fibrillin-1 proteins bind to each other and to other proteins to form threadlike filaments called microfibrils, which are organized into a network. This microfibrillar network acts as a platform or scaffold for the assembly of elastic fibers, which enable the skin, ligaments, and blood vessels to stretch. The microfibrillar network also provides support to the bones and to the tissues that support the nerves, muscles, and lenses of the eyes.
Normal function
The FBN1 gene provides instructions for making a large protein called fibrillin-1. This protein is transported out of cells into the extracellular matrix, which is an intricate lattice of proteins and other molecules that forms in the spaces between cells. In the extracellular matrix, fibrillin-1 proteins bind to each other and to other proteins to form threadlike filaments called microfibrils, which are organized into a network. This microfibrillar network acts as a platform or scaffold for the assembly of elastic fibers, which enable the skin, ligaments, and blood vessels to stretch. The microfibrillar network also provides support to the bones and to the tissues that support the nerves, muscles, and lenses of the eyes.
As part of the microfibrillar network, fibrillin-1 also regulates certain growth factor proteins. Growth factors are important proteins that help regulate cell processes such as the growth and division (proliferation) of cells, the process by which cells mature to carry out specific functions (differentiation), cell movement, and the self-destruction of cells (apoptosis). A particular growth factor called transforming growth factor beta (TGF-β) is stored within the microfibrillar network. When it is stored, TGF-β is turned off. Once it is released from the network, TGF-β is turned on and can activate important signaling pathways, including those involved in bone formation. By helping to regulate the availability of TGF-β, fibrillin-1 also helps regulate its activity.
Conditions referring to this gene or chromosome
Otros nombres
asprosin
Síndrome de Marfan
MASS
OCTD
SGS
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Lecturas adicionales y referencias
- fibrillin 1; MedlinePlus, National Library of Medicine.
- Arbustini E, Grasso M, Ansaldi S, Malattia C, Pilotto A, Porcu E, Disabella E, Marziliano N, Pisani A, Lanzarini L, Mannarino S, Larizza D, Mosconi M, Antoniazzi E, Zoia MC, Meloni G, Magrassi L, Brega A, Bedeschi MF, Torrente I, Mari F, Tavazzi L. Identification of sixty-two novel and twelve known FBN1 mutations in eighty-one unrelated probands with Marfan syndrome and other fibrillinopathies. Hum Mutat. 2005 Nov;26(5):494. doi: 10.1002/humu.9377.
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- Glesby MJ, Pyeritz RE. Association of mitral valve prolapse and systemic abnormalities of connective tissue. A phenotypic continuum. JAMA. 1989 Jul 28;262(4):523-8.
- Globa E, Zelinska N, Dauber A. The Clinical Cases of Geleophysic Dysplasia: One Gene, Different Phenotypes. Case Rep Endocrinol. 2018 Jul 3;2018:8212417. doi: 10.1155/2018/8212417. eCollection 2018.
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- Marzin P, Thierry B, Dancasius A, Cavau A, Michot C, Rondeau S, Baujat G, Phan G, Bonniere M, Le Bourgeois M, Khraiche D, Pejin Z, Bonnet D, Delacourt C, Cormier-Daire V. Geleophysic and acromicric dysplasias: natural history, genotype-phenotype correlations, and management guidelines from 38 cases. Genet Med. 2021 Feb;23(2):331-340. doi: 10.1038/s41436-020-00994-x. Epub 2020 Oct 21.
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