User:Gourinchas Geoffrey/Sandbox 205
From Proteopedia
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== HUMAN ERYTHROPOIETIN == | == HUMAN ERYTHROPOIETIN == | ||
| - | [[Image:Erythropoietin.png|200px|left|thumb|Erythropoeitin]] <Structure load='1buy' size='500' frame='true' align='right' caption='Molecule of Erythropoietin' scene='' | + | [[Image:Erythropoietin.png|200px|left|thumb|Erythropoeitin]] <Structure load='1buy' size='500' frame='true' align='right' caption='Molecule of Erythropoietin' scene='User:Gourinchas_Geoffrey/Sandbox_205/Picture_of_presentation/1'/> |
The [http://en.wikipedia.org/wiki/Erythropoietin Erythropoietin] hormone is a glycoprotein which is involved in [http://en.wikipedia.org/wiki/Erythropoiesis Erythropoiesis], which is the red blood cells production. | The [http://en.wikipedia.org/wiki/Erythropoietin Erythropoietin] hormone is a glycoprotein which is involved in [http://en.wikipedia.org/wiki/Erythropoiesis Erythropoiesis], which is the red blood cells production. | ||
It allows the differenciation of the erythrocyte precursors in the bone marrow. | It allows the differenciation of the erythrocyte precursors in the bone marrow. | ||
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| - | <StructureSection load='1buy' size='500' side='right' caption='Structure Erythropoietin (PDB entry [[1buy]])' scene='User:Gourinchas_Geoffrey/Sandbox_205/Photo_of_the_structure/1 | + | <StructureSection load='1buy' size='500' side='right' caption='Structure Erythropoietin (PDB entry [[1buy]])' scene=''User:Gourinchas_Geoffrey/Sandbox_205/Photo_of_the_structure/1'> |
== Structure == | == Structure == | ||
Revision as of 14:16, 28 November 2011
HUMAN ERYTHROPOIETIN
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The Erythropoietin hormone is a glycoprotein which is involved in Erythropoiesis, which is the red blood cells production. It allows the differenciation of the erythrocyte precursors in the bone marrow.
Biological role
L'Erythropoietin is a glycosylated hormone mainly secreted in the kidneys (90%) and little in the liver. The secretion of this hormone depend of the partial pressure of dioxygen in the kidney cells. Indeed, if there is a diminution of the dioxygen pressure, the number of red blood cells decreases, for example when your are at high altitude, or if you are a big hemorrhagic wound. Thus needs of dioxygen of the tissues increase and thus the secretion of Erythropoietin is stimulated.
On the contrary, an increase of the pressure of dioxygen decrease the secretion of Erythropoietin.
To increase the number of red blood cells, this hormone stimulate the proliferation of stem cells precursor of erythrocyte in the bone marrow which will became red blood cells. The glycosylation of this hormone allows his solubilisation in the blood and his carry towards his target, the bone marrow.
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