ATP binding cassette subfamily A member 3
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A ABCA3 gene provides instructions for making a protein involved in surfactant production. Surfactant is a mixture of certain fats (called phospholipids) and proteins that lines the lung tissue and makes breathing easy. Without normal surfactant, the tissue surrounding the air sacs in the lungs (the alveoli) sticks together after exhalation (because of a force called surface tension), causing the alveoli to collapse. As a result, filling the lungs with air on each breath becomes very difficult, and delivery of oxygen to the body is impaired.
Normal function
A ABCA3 gene provides instructions for making a protein involved in surfactant production. Surfactant is a mixture of certain fats (called phospholipids) and proteins that lines the lung tissue and makes breathing easy. Without normal surfactant, the tissue surrounding the air sacs in the lungs (the alveoli) sticks together after exhalation (because of a force called surface tension), causing the alveoli to collapse. As a result, filling the lungs with air on each breath becomes very difficult, and delivery of oxygen to the body is impaired.
The ABCA3 protein is found in the membrane that surrounds lamellar bodies, which are the cellular structures in which the phospholipids and proteins that make up surfactant are packaged. The ABCA3 protein transports phospholipids into the lamellar bodies where they interact with surfactant proteins to form surfactant. The ABCA3 protein also appears to be involved in the formation of normal lamellar bodies. In addition to packaging, lamellar bodies are important for the correct processing of surfactant proteins, which is necessary for the proteins to mature and become functional.
Conditions referring to this gene or chromosome
Other names
ABC transporter 3
ABC-C
ABC-C transporter
ABC3
ABCA3_HUMAN
ATP-binding cassette sub-family A member 3
ATP-binding cassette transporter 3
ATP-binding cassette, sub-family A (ABC1), member 3
SMDP3
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Leitura adicional e referências
- ATP binding cassette subfamily A member 3; MedlinePlus, National Library of Medicine.
- Brasch F, Schimanski S, Muhlfeld C, Barlage S, Langmann T, Aslanidis C, Boettcher A, Dada A, Schroten H, Mildenberger E, Prueter E, Ballmann M, Ochs M, Johnen G, Griese M, Schmitz G. Alteration of the pulmonary surfactant system in full-term infants with hereditary ABCA3 deficiency. Am J Respir Crit Care Med. 2006 Sep 1;174(5):571-80. doi: 10.1164/rccm.200509-1535OC. Epub 2006 May 25.
- Cheong N, Zhang H, Madesh M, Zhao M, Yu K, Dodia C, Fisher AB, Savani RC, Shuman H. ABCA3 is critical for lamellar body biogenesis in vivo. J Biol Chem. 2007 Aug 17;282(33):23811-7. doi: 10.1074/jbc.M703927200. Epub 2007 May 31.
- Matsumura Y, Ban N, Inagaki N. Aberrant catalytic cycle and impaired lipid transport into intracellular vesicles in ABCA3 mutants associated with nonfatal pediatric interstitial lung disease. Am J Physiol Lung Cell Mol Physiol. 2008 Oct;295(4):L698-707. doi: 10.1152/ajplung.90352.2008. Epub 2008 Aug 1.
- Matsumura Y, Ban N, Ueda K, Inagaki N. Characterization and classification of ATP-binding cassette transporter ABCA3 mutants in fatal surfactant deficiency. J Biol Chem. 2006 Nov 10;281(45):34503-14. doi: 10.1074/jbc.M600071200. Epub 2006 Sep 7.
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