A vertebrate globin expressed in the brain

A vertebrate globin expressed in the brain
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DOI:
10.1038/35035093
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发表时间:
2000-09-28
期刊:
影响因子:
64.8
通讯作者:
Hankeln, T
Hankeln, T
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Burmester, T;Weich, B;Hankeln, T

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血红蛋白和肌红蛋白构成相关蛋白家族,在人类和其他脊椎动物的氧运输和储存中发挥作用(1,2)。在这里,我们报告的第三种珠蛋白类型的人和小鼠的鉴定。这种蛋白质主要在大脑中表达,因此我们称之为神经红蛋白。小鼠脑红蛋白是一种具有高氧亲和力的单体(半饱和压,P(50)约为2 Ω)。类似于肌红蛋白,脑红蛋白可以增加脑组织的氧气供应。人脑红蛋白基因(NGB)位于染色体14 q24,具有独特的外显子-内含子结构。脑红蛋白代表了一个独特的蛋白质家族,在后生动物进化的早期,可能在Protostomia/Deuterostomia分裂之前就分化了。
Haemoglobins and myoglobins constitute related protein families that function in oxygen transport and storage in humans and other vertebrates(1,2). Here we report the identification of a third globin type in man and mouse. This protein is predominantly expressed in the brain, and therefore we have called it neuroglobin. Mouse neuroglobin is a monomer with a high oxygen affinity (half saturation pressure, P(50) approximate to 2 torr). Analogous to myoglobin, neuroglobin may increase the availability of oxygen to brain tissue. The human neuroglobin gene (NGB), located on chromosome 14q24, has a unique exon-intron structure. Neuroglobin represents a distinct protein family that diverged early in metazoan evolution, probably before the Protostomia/Deuterostomia split.