Sandbox GGC8: Difference between revisions
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== Function == | == Function == | ||
Hemoglobin A is an oxygen-transport protein. Hemoglobin is also an allosteric protein. It is a tetrameter composed of two types of sub units designated α and β, with stoichiometry α2β2 | Hemoglobin A is an oxygen-transport protein. Hemoglobin is also an allosteric protein. It is a tetrameter composed of two types of sub units designated α and β, with stoichiometry α2β2 | ||
The function of Hemoglobin is to carry oxygen from the lungs to the other parts of the body . Hemoglobin also help to carry carbon dioxide through the blood cells.Hemoglobin A which is a component of the red blood cells also help with the transportation of carbon dioxide and hydrogen ions to the lungs. Hemoglobin proteins are capable of carrying four molecules of Oxygen . Hemoglobin also help red blood cells to maintain their disc like shape , which allows them to move freely through the blood vessels. Each sub-unit of Hemoglobin A contains a heme prosthetic group. The heme molecules give hemoglobin its red color. | The function of Hemoglobin is to carry oxygen from the lungs to the other parts of the body . Hemoglobin also help to carry carbon dioxide through the blood cells.Hemoglobin A which is a component of the red blood cells also help with the transportation of carbon dioxide and hydrogen ions to the lungs. Hemoglobin proteins are capable of carrying four molecules of Oxygen . Hemoglobin also help red blood cells to maintain their disc like shape , which allows them to move freely through the blood vessels. Each sub-unit of Hemoglobin A contains a heme prosthetic group. The heme molecules give hemoglobin its red color.<ref>doi:10.1007/s10533-009-9387-8</ref> | ||
== Disease == | == Disease == | ||
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== Structural highlights == | == Structural highlights == | ||
<scene name='78/781194/92-63/2'> | <scene name='78/781194/92-63/2'>Proximal His87 and the distal His 58</scene> The α chain heme pocket with the relative orientation of the proximal Hisα87 and the distal Hisα58.proximal Hisα87(F8) is closer to the heme Fe atom by 0.10 Å more in the T-state compare to the R-state.<ref>doi: 10.1074/jbc.M109.066027</ref> | ||
<scene name='78/781194/Hemoglobin/1'>This scene show the structure of the full hemoglobin </scene> | <scene name='78/781194/Hemoglobin/1'>This scene show the structure of the full hemoglobin </scene> | ||
<scene name='78/781194/92-63/3'> | |||
<scene name='78/781194/92-63/3'>Proximal 92 His and distal 63 His </scene>) The β chain heme pocket with the proximal Hisβ92(F8) and the distal Hisβ63(E7). In the R-state the proximal Hisβ92(F8) reorients itself to a more symmetric position relative to the heme molecule. In the T-state, the distal histidine E7 residue is positioned such that it partially blocks the oxygen-binding site. During the R → T transition, Hisβ63(E7) aligns itself with the heme Fe, and the Fe-His distances increase by a small but detectable amount<ref>doi: 10.1074/jbc.M109.066027</ref> | |||
You may include any references to papers as in: the use of JSmol in Proteopedia <ref>DOI 10.1002/ijch.201300024</ref> or to the article describing Jmol <ref>PMID:21638687</ref> to the rescue. | You may include any references to papers as in: the use of JSmol in Proteopedia <ref>DOI 10.1002/ijch.201300024</ref> or to the article describing Jmol <ref>PMID:21638687</ref> to the rescue. | ||
</StructureSection> | </StructureSection> | ||
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https://www.sciencedirect.com/science/article/pii/S0022283600935253?via%3Dihub#FIG4 | https://www.sciencedirect.com/science/article/pii/S0022283600935253?via%3Dihub#FIG4 | ||
<references/> | <references/> | ||
https://www.verywellhealth.com/importance-of-hemoglobin-2249107 | |||