Sandbox Reserved 1105: Difference between revisions
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== TTR transport functions == | == TTR transport functions == | ||
Human transthyretin (TTR) ([[4tlt]]) is a highly conserved homotetrameric transport protein. Identified in 1942, it was originally called prealbumin as it runs faster than albumin ([[1bm0]]) during SDS-PAGE | Human transthyretin (TTR) ([[4tlt]]) is a highly conserved homotetrameric transport protein. Identified in 1942, it was originally called prealbumin as it runs faster than albumin ([[1bm0]]) during SDS-PAGE <ref> Seibert FB, Nelson JW. Electrophoretic study of the blood protein response in tuberculosis. J Biol Chem 1942; 143: 29–38. </ref>. After discovering its binding and transport ability to thyroid hormones, it was given the name of “thyroxine-binding prealbumin” (TBPA). Finally, its actual name refers to an additional carrier function: '''trans'''ports '''thyr'''oxine (T4) and '''ret'''inol (vitamin A). | ||
It is mainly present in the plasma and synthetized by the liver, but also in the cerebrospinal fluid produced by the choroid plexus of the brain, and in retinal pigment epithelium. | It is mainly present in the plasma and synthetized by the liver, but also in the cerebrospinal fluid produced by the choroid plexus of the brain, and in retinal pigment epithelium. | ||
The TTR gene is located on chromosome 18 [ | The TTR gene is located on chromosome 18 <ref> Wallace MR, Naylor SL, Kluve-Beckerman B, Long GL, McDonald L, Shows TB, Benson MD, Localization of the human prealbumin gene to chromosome 18 [archive], Biochem Biophys Res Commun, 1985;129:753–758<réf/>. | ||
== Structure TTR structure with natural ligand : T4 and retinol == | == Structure TTR structure with natural ligand : T4 and retinol == | ||
