Carbohydrate metabolism in Antarctic birds' erythrocytes: Levels of IP5 and 2,3-DPG and their effect on chicken hexokinase activity
The aim of the present study is to show the possible implication of organic phosphate metabolites=namely inositol pentaphosphate (IP5) and 2,3-bisphosphoglycerate (2,3-DPG)=in the glucose metabolism displayed by birds erythrocytes. For this purpose, a preparation of hexokinase (HK) has been purified...
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National Institute of Polar Research
1998
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fttriple:oai:gotriple.eu:oai:doaj.org/article:060eda45370c443ead71b229cf28d514 2023-05-15T13:36:05+02:00 Carbohydrate metabolism in Antarctic birds' erythrocytes: Levels of IP5 and 2,3-DPG and their effect on chicken hexokinase activity Edson Rodrigues Rubens Rosa Dario Ocampos Claudete D. Rosa Metry Bacila 1998-03-01 https://doi.org/10.15094/00009031 https://doaj.org/article/060eda45370c443ead71b229cf28d514 en other eng National Institute of Polar Research doi:10.15094/00009031 0085-7289 2432-079X https://doaj.org/article/060eda45370c443ead71b229cf28d514 undefined Antarctic Record, Vol 42, Iss 1, Pp 101-110 (1998) envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 1998 fttriple https://doi.org/10.15094/00009031 2023-01-22T18:19:13Z The aim of the present study is to show the possible implication of organic phosphate metabolites=namely inositol pentaphosphate (IP5) and 2,3-bisphosphoglycerate (2,3-DPG)=in the glucose metabolism displayed by birds erythrocytes. For this purpose, a preparation of hexokinase (HK) has been purified from chicken erythrocytes (RBC) by affinity chromatography in Sepharose-N-aminohexanoyl glucosamine and used for kinetic experiments. It has been shown that IP5 is a competitive inhibitor of HK in regard to Mg^, but not in regard to glucose and MgATP^. On the other hand, this preparation of HK is also competitively inhibited by ATP^. It has been found that the total intracellular content of Mg^ (2.76μmol/ml) is lower than the total value for the content of ATP and IP5 found in a standard packed red blood cell suspension. Article in Journal/Newspaper Antarc* Antarctic Unknown Antarctic |
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language |
English |
topic |
envir geo |
spellingShingle |
envir geo Edson Rodrigues Rubens Rosa Dario Ocampos Claudete D. Rosa Metry Bacila Carbohydrate metabolism in Antarctic birds' erythrocytes: Levels of IP5 and 2,3-DPG and their effect on chicken hexokinase activity |
topic_facet |
envir geo |
description |
The aim of the present study is to show the possible implication of organic phosphate metabolites=namely inositol pentaphosphate (IP5) and 2,3-bisphosphoglycerate (2,3-DPG)=in the glucose metabolism displayed by birds erythrocytes. For this purpose, a preparation of hexokinase (HK) has been purified from chicken erythrocytes (RBC) by affinity chromatography in Sepharose-N-aminohexanoyl glucosamine and used for kinetic experiments. It has been shown that IP5 is a competitive inhibitor of HK in regard to Mg^, but not in regard to glucose and MgATP^. On the other hand, this preparation of HK is also competitively inhibited by ATP^. It has been found that the total intracellular content of Mg^ (2.76μmol/ml) is lower than the total value for the content of ATP and IP5 found in a standard packed red blood cell suspension. |
format |
Article in Journal/Newspaper |
author |
Edson Rodrigues Rubens Rosa Dario Ocampos Claudete D. Rosa Metry Bacila |
author_facet |
Edson Rodrigues Rubens Rosa Dario Ocampos Claudete D. Rosa Metry Bacila |
author_sort |
Edson Rodrigues |
title |
Carbohydrate metabolism in Antarctic birds' erythrocytes: Levels of IP5 and 2,3-DPG and their effect on chicken hexokinase activity |
title_short |
Carbohydrate metabolism in Antarctic birds' erythrocytes: Levels of IP5 and 2,3-DPG and their effect on chicken hexokinase activity |
title_full |
Carbohydrate metabolism in Antarctic birds' erythrocytes: Levels of IP5 and 2,3-DPG and their effect on chicken hexokinase activity |
title_fullStr |
Carbohydrate metabolism in Antarctic birds' erythrocytes: Levels of IP5 and 2,3-DPG and their effect on chicken hexokinase activity |
title_full_unstemmed |
Carbohydrate metabolism in Antarctic birds' erythrocytes: Levels of IP5 and 2,3-DPG and their effect on chicken hexokinase activity |
title_sort |
carbohydrate metabolism in antarctic birds' erythrocytes: levels of ip5 and 2,3-dpg and their effect on chicken hexokinase activity |
publisher |
National Institute of Polar Research |
publishDate |
1998 |
url |
https://doi.org/10.15094/00009031 https://doaj.org/article/060eda45370c443ead71b229cf28d514 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Antarctic Record, Vol 42, Iss 1, Pp 101-110 (1998) |
op_relation |
doi:10.15094/00009031 0085-7289 2432-079X https://doaj.org/article/060eda45370c443ead71b229cf28d514 |
op_rights |
undefined |
op_doi |
https://doi.org/10.15094/00009031 |
_version_ |
1766074185101082624 |