Luciferase Activity of Insect Fatty Acyl-CoA Synthetases with Synthetic Luciferins.

Luciferase Activity of Insect Fatty Acyl-CoA Synthetases with Synthetic Luciferins.
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DOI:
10.1021/acschembio.7b00813
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发表时间:
2017-12-15
影响因子:
4
通讯作者:
Miller SC
Miller SC
中科院分区:
生物学2区
文献类型:
--
作者:
Mofford DM;Liebmann KL;Sankaran GS;Reddy GSKK;Reddy GR;Miller SC

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长链脂肪酰辅酶A合成酶(ACSL)是萤火虫荧光素酶的同源物,但不能与萤火虫荧光素一起发光。最近,我们发现来自果蝇果蝇的 ACSL 是一种潜在的荧光素酶,它会与合成荧光素 CycLuc2 一起发光。在这里,我们对三个昆虫 ACSL 进行了分析,其中包含超过 20 种荧光素类似物。来自不发光甲虫 Agrypnus binodulus (AbLL) 的 ACSL 被发现是具有独特底物特异性的第二种潜在荧光素酶。几种刚性荧光素与 ACSL 一起发光,但苯乙烯基荧光素类似物仅适用于 AbLL 的发光底物。另一方面,来自发光甲虫 Pyrophorus angustus 的 ACSL 与所有测试的类似物都缺乏荧光素酶活性,尽管它与甲虫荧光素酶具有更高的同源性。 ACSL 的进一步研究有望揭示生物发光和底物选择性所需的特征。
Long-chain fatty acyl-CoA synthetases (ACSLs) are homologs of firefly luciferase, but are incapable of emitting light with firefly luciferin. Recently, we found that an ACSL from the fruit fly Drosophila melanogaster is a latent luciferase that will emit light with the synthetic luciferin CycLuc2. Here we have profiled a panel of three insect ACSLs with a palette of >20 luciferin analogues. An ACSL from the nonluminescent beetle Agrypnus binodulus (AbLL) was found to be a second latent luciferase with distinct substrate specificity. Several rigid luciferins emit light with both ACSLs, but styryl luciferin analogues are light-emitting substrates only for AbLL. On the other hand, an ACSL from the luminescent beetle Pyrophorus angustus lacks luciferase activity with all tested analogues, despite its higher homology to beetle luciferases. Further study of ACSLs is expected to shed light on the features necessary for bioluminescence and substrate selectivity.
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