Heterologous expression and functional characterization of cysteamine dioxygenase from the deep-sea mussel Bathymodiolus septemdierum
Heterologous expression and functional characterization of cysteamine dioxygenase from the deep-sea mussel Bathymodiolus septemdierum
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深海贻贝Bathymodiolus septemdierum半胱胺双加氧酶的异源表达和功能表征
DOI:
10.1007/s12562-023-01674-w
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发表时间:
2023
影响因子:
1.9
通讯作者:
Inoue Koji
中科院分区:
文献类型:
--
作者:
Yoda Kotaro;Takagi Toshiyuki;Koito Tomoko;Okai Masahiko;Makita Hiroko;Mitsunobu Satoshi;Yoshida Takao;Inoue Koji
In invertebrates inhabiting hydrothermal vent areas, hypotaurine, a precursor of taurine, is thought to mitigate the toxicity of hydrogen sulfide in vent fluids. Information about hypotaurine synthesis pathways in invertebrates is limited, although two pathways, the cysteamine [2-aminoethanethiol (AET)] pathway and the cysteine sulfinate (CSA) pathway are known in mammals. In this study, we cloned a cDNA encoding AET dioxygenase (ADO), the central enzyme of the AET pathway, from the vent musselBathymodiolus septemdierum. In the encoded protein (BsADO), functionally important residues, including metal-binding histidines, are conserved. In maximum likelihood phylogenetic analysis,BsADO clustered with ADOs of other invertebrates. By reverse transcription PCR,BsADOmRNA was detected in all tissues examined at similar levels, suggesting that its function is distinct from that of the CSA pathway, predominantly expressed in the gill.BsADO with a His tag, expressed inEscherichia coliin the presence of Fe2+, converted AET to hypotaurine, butBsADO expressed in the absence of iron exhibited lower activity.BsADO was active from pH 8 to 11, and from 0 °C to 37 °C, with a peak at 20 °C. This is the first functional characterization ofADOin marine invertebrates.
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DOI:
--
发表时间:
2019
期刊:
Comparative biochemistry and physiology. Part A, Molecular & integrative physiology
影响因子:
--
作者:
Azusa Kinjo;M. Sassa;Tomoko Koito;Miwa Suzuki;Koji Inoue
通讯作者:
Koji Inoue
影响因子:
3.5
作者:
T. Ubuka;A. Okada;H. Nakamura
通讯作者:
H. Nakamura
影响因子:
1.9
作者:
Fujinoki, Masaru;Koito, Tomoko;Inoue, Koji
通讯作者:
Inoue, Koji
影响因子:
2.4
作者:
Pruski, AM;Fiala-Médioni, A;Colomines, JC
通讯作者:
Colomines, JC
影响因子:
2.8
作者:
A. Pruski;A. Fiala
通讯作者:
A. Fiala