A human protein hydroxylase that accepts D-residues.

A human protein hydroxylase that accepts D-residues.
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DOI:
10.1038/s42004-020-0290-5
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发表时间:
2020-05-01
影响因子:
5.9
通讯作者:
Schofield, Christopher J.
Schofield, Christopher J.
中科院分区:
化学2区
文献类型:
--
作者:
Choi, Hwanho;Hardy, Adam P.;Leissing, Thomas M.;Chowdhury, Rasheduzzaman;Nakashima, Yu;Ge, Wei;Markoulides, Marios;Scotti, John S.;Gerken, Philip A.;Thorbjornsrud, Helen;Kang, Dahye;Hong, Sungwoo;Lee, Joongoo;McDonough, Michael A.;Park, Hwangseo;Schofield, Christopher J.

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缺氧诱导因子抑制因子(FIH)是一种2-酮戊二酸依赖性蛋白羟化酶,催化蛋白残基的C3羟基化。我们报告FIH可以接受(D)-和(L)-残基进行羟基化。FIH对(D)和(L)差向异构体的底物选择性不同,例如,(D)-而不是(L)-烯丙基甘氨酸,和相反地(L)-而不是(D)-天冬氨酸,在测试的序列环境中经历单羟基化。含(L)-Leu的底物经历FH催化的单羟基化,而(D)-Leu出乎意料地经历二羟基化。晶体学、质谱和DFT研究提供了FIH对(L)-和(D)-残基的选择性的见解。这项工作的结果扩大了潜在的范围内已知的底物羟基化分离的FIH,并意味着它将有可能产生FIH变异体与改变的选择性。缺氧诱导因子(Hypoxia-inducible factor,FIH)是一种能使蛋白质发生后羟化的加氧酶,参与多种生物学过程。在这里,证明了FIH的宽底物耐受性,包括d-氨基酸,其中观察到d-亮氨酸的双羟基化。
Factor inhibiting hypoxia-inducible factor (FIH) is a 2-oxoglutarate-dependent protein hydroxylase that catalyses C3 hydroxylations of protein residues. We report FIH can accept (D)- and (L)-residues for hydroxylation. The substrate selectivity of FIH differs for (D) and (L) epimers, e.g., (D)- but not (L)-allylglycine, and conversely (L)- but not (D)-aspartate, undergo monohydroxylation, in the tested sequence context. The (L)-Leu-containing substrate undergoes FIH-catalysed monohydroxylation, whereas (D)-Leu unexpectedly undergoes dihydroxylation. Crystallographic, mass spectrometric, and DFT studies provide insights into the selectivity of FIH towards (L)- and (D)-residues. The results of this work expand the potential range of known substrates hydroxylated by isolated FIH and imply that it will be possible to generate FIH variants with altered selectivities. Hypoxia-inducible factor (FIH) is an oxygenase which post-translationally hydroxylates proteins and is implicated in a range of biological processes. Here a wide substrate tolerance for FIH is demonstrated, including for d-amino acids, where double hydroxylation of d-leucine is observed.
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