Cycloserine enantiomers inhibit PLP‐dependent cysteine desulfurase SufS via distinct mechanisms
Cycloserine enantiomers inhibit PLP‐dependent cysteine desulfurase SufS via distinct mechanisms
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环丝氨酸对映体通过不同的机制抑制 PLP 依赖性半胱氨酸脱硫酶 SufS
DOI:
10.1111/febs.16455
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Fujishiro Takashi
中科院分区:
文献类型:
--
作者:
Nakamura Ryosuke;Ogawa Shoko;Takahashi Yasuhiro;Fujishiro Takashi
The cysteine desulfurase SufS is a pyridoxal‐5′‐phosphate‐dependent enzyme and is essential for the SUF system, which participates in iron–sulfur cluster biosynthesis. Inhibition of SufS in the SUF system byD‐cycloserine (DCS) inPlasmodium falciparumapicoplast has recently been reported, indicating that SufS could be a target for malaria therapeutics. However, the mechanistic details underlying the inhibition of SufS by DCS have not yet been clarified. Moreover, inhibition of SufS by the other enantiomer,L‐cycloserine (LCS), has not been investigated. Herein, we investigated the structure‐based inhibition mechanisms of SufS by DCS and LCS usingBacillus subtilisSufS, whose catalytic mechanism has been well characterized in comparison to that of theP.falciparumSufS. Surprisingly, DCS‐ and LCS‐mediated inhibitions of SufS occur via distinct mechanisms resulting in pyridoxamine‐5′‐phosphate (PMP) in DCS‐mediated inhibition and PMP‐3‐hydroxyisoxazole adduct (PMP‐isoxazole) in LCS‐mediated inhibition. Biochemical and structural evaluation of SufS variants identified conserved His and Arg residues at the active site as the key determinants of the distinct inhibition mechanisms. The importance of structural elements involved in DCS and LCS‐mediated inhibitions of SufS provides valuable insights for the structure‐based design of new drugs targeting SufS.DatabaseStructural data are available in PDB database under the accession numbers 6KFY, 7CEO, 7CEP, 7CEQ, 7CER, 7CES, 7CET, 7CEU, 7E6A, 7E6B, 7E6C, 7E6D, 7E6E, and 7E6F.
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影响因子:
3.7
作者:
Bharath SR;Bisht S;Harijan RK;Savithri HS;Murthy MR
通讯作者:
Murthy MR
影响因子:
2.7
作者:
Fu,Mengmeng;Silverman,RichardB
通讯作者:
Silverman,RichardB
影响因子:
4
作者:
Amorim Franco TM;Favrot L;Vergnolle O;Blanchard JS
通讯作者:
Blanchard JS
DOI:
10.1016/j.bbamcr.2014.11.018
发表时间:
2015-06
影响因子:
5.1
作者:
Mettert, Erin L.;Kiley, Patricia J.
通讯作者:
Kiley, Patricia J.
DOI:
--
发表时间:
1955
期刊:
Antibiotics & chemotherapy
影响因子:
--
作者:
G. M. Shull;J. L. Sardinas
通讯作者:
J. L. Sardinas