Cytochrome b ₅ is an essential electron transfer protein, which is ubiquitously found in living systems and involved in wide variety of biological processes. Tardigrades (also known as water bears), some of which are famous for desiccation resistance, have many proteins unique to them. Here, we report spectroscopic and structural characterization of a cytochrome b ₅ like protein from one of the desiccation‐tolerant tardigrades, Ramazzottius varieornatus strain YOKOZUNA‐1 (Rv Cytb ₅). A 1.4 Å resolution crystal structure revealed that Rv Cytb ₅ is a new cytochrome b ₅ protein specific to tardigrades.

中文翻译：

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细胞色素b5的结构，仅是节肢动物。

细胞色素b ₅是一种必需的电子转移蛋白，广泛存在于生物系统中，并参与多种生物过程。Tardigrades（也称为水熊）（其中一些以抗干燥性闻名）具有许多独特的蛋白质。在这里，我们报道了一种来自干燥耐性的缓坡级变种Ramazzottius varieornatus菌株YOKOZUNA-1（Rv Cyt b ₅）的细胞色素b ₅样蛋白的光谱学和结构表征。1.4Å分辨率的晶体结构表明Rv Cyt b ₅是一种新的细胞色素b ₅ 特异于缓和剂的蛋白质。