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氧气与铁卟啉结合中的协同性。

Cooperativity in O2 binding to iron porphyrins.

作者信息

Collman J P, Brauman J I, Rose E, Suslick K S

出版信息

Proc Natl Acad Sci U S A. 1978 Mar;75(3):1052-5. doi: 10.1073/pnas.75.3.1052.

Abstract

The solid-gas O2 binding equilibrium has been studied for for ferrous "picket fence" porphyrinates with sterically hindered axial imidazoles. Such systems show significant cooperativity in their binding of O2: at low O2 pressures a low O2 affinity form exists, and at high O2 pressures a higher O2 affinity form develops. Direct analogies are drawn to the cooperativity shown in O2 binding by hemoglobin. These model systems mimic hemoglobin quantitatively.

摘要

对于带有空间位阻轴向咪唑的亚铁“栅栏”卟啉配合物,研究了其固-气氧气结合平衡。这类体系在氧气结合过程中表现出显著的协同性:在低氧压力下存在低氧亲和力形式,而在高氧压力下会形成更高氧亲和力形式。文中直接将其与血红蛋白在氧气结合过程中表现出的协同性进行了类比。这些模型体系在定量方面模拟了血红蛋白。

相似文献

1
Cooperativity in O2 binding to iron porphyrins.氧气与铁卟啉结合中的协同性。
Proc Natl Acad Sci U S A. 1978 Mar;75(3):1052-5. doi: 10.1073/pnas.75.3.1052.
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Model compounds for the T state of hemoglobin.血红蛋白T态的模型化合物。
Proc Natl Acad Sci U S A. 1978 Feb;75(2):564-8. doi: 10.1073/pnas.75.2.564.
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Proc Natl Acad Sci U S A. 1979 Dec;76(12):6035-9. doi: 10.1073/pnas.76.12.6035.

引用本文的文献

本文引用的文献

1
Spectroscopic properties of protoheme complexes undergoing reversible oxygenation.
J Am Chem Soc. 1974 Aug 21;96(17):5593-5. doi: 10.1021/ja00824a059.
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Reaction of polymer-heme complexes with carbon monoxide or molecular oxygen.
Biochem Biophys Res Commun. 1975 Dec 1;67(3):864-9. doi: 10.1016/0006-291x(75)90756-1.
5
Letter: Oxygen binding to iron porphyrins.
J Am Chem Soc. 1975 Nov 26;97(24):7185-6. doi: 10.1021/ja00857a050.
7
Structure and mechanism of haemoglobin.血红蛋白的结构与机制。
Br Med Bull. 1976 Sep;32(3):195-208. doi: 10.1093/oxfordjournals.bmb.a071363.
8
Synthetic hemopolymers for reversible binding of molecular oxygen.
Angew Chem Int Ed Engl. 1977 Feb;16(2):117-8. doi: 10.1002/anie.197701171.
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Allosteric effects in cobaltohaemoglobin as studied by precise oxygen equilibrium measurements.
J Mol Biol. 1977 Jan 5;109(1):83-97. doi: 10.1016/s0022-2836(77)80047-8.

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