一种新型环氧化物水解酶的发现及其催化机理的阐明
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基金项目:

国家自然科学基金(21808073);福建省自然科学基金(2021J05058);微生物技术开放项目国家重点实验室基金(M2022-02);中央高校基本科研业务费专项资金(ZQN-814);华侨大学高层次人才科研启动费(600005-Z17Y0072);泉州市科技计划(2018C008)


Discovery of a novel epoxide hydrolase and elucidation of its catalytic mechanism
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    摘要:

    【目的】环氧化物水解酶(epoxide hydrolases,EHs)在手性药物的合成中起着重要作用。为了补充和发现更多的高性能环氧化物水解酶,通过基因调取技术探索新的环氧化物水解酶。【方法】通过基因调取技术鉴定了一种来自卡尔斯巴德曲霉的新型环氧化物水解酶(Aspergillus carlsbadensis epoxide hydrolase,AcEH)。采用AutoDock2预测AcEH的关键水解位点,通过计算设计阐明重要位点对AcEH的结构和催化机制的影响。【结果】对新型AcEH一级结构的分析揭示了3个特征性α/β EH基序的存在:HGWP、GYTFS和GGDIGS。AcEH酶表现出高活性,可在15 min内完全水解氧化苯乙烯(styrene oxide,SO),比活性为13 951 U/g。KmVmaxkcat/Km值分别为(107.07±57.98) mmol/L、(37.22±17.85)μmol/(min·mg)和1.17 mmol/(L·s)。AcEH的关键水解位点是催化三联体的Asp192-His372-Glu346和2个保守酪氨酸Tyr251/314。某些突变(R49L、R49Y)导致酶失活,而其他突变(Y45L)导致无活性包涵体的形成。相互作用网络分析显示,第49个氨基酸残基的变化破坏了重要活性位点残基的相互作用,导致酶失活。另一方面,第45个氨基酸残基的改变使酶的结构不稳定,导致包涵体的形成。【结论】本研究发现了一种新的环氧化物水解酶,并分析了其水解机制,为进一步研究这种酶及其工业化应用提供了有价值的见解。

    Abstract:

    [Objective] Epoxide hydrolases (EHs) play a key role in the synthesis of chiral pharmaceuticals. We explored new EHs by engineering or gene retrieval, aiming to enrich and discover more high-performance EHs. [Methods] A novel epoxide hydrolase (Aspergillus carlsbadensisepoxide hydrolase, AcEH) from Aspergillus carlsbadensis was identified by gene retrieval technology. We then used AutoDock2 to predict the key hydrolysis sites of AcEH and employed computational design to clarify the influences of important sites on the structure and catalytic mechanism of AcEH. [Results] The primary structure of the novel EH had three characteristic α/β EH motifs: HGWP, GYTFS, and GGDIGS. AcEH exhibited high activity and could completely hydrolyze styrene oxide (SO) within 15 min, with a specific activity of 13 951 U/g. The Km, Vmax, and kcat/Km of AcEH were (107.07±57.98) mmol/L, (37.22±17.85) μmol/(min·mg), and 1.17 mmol/(L·s), respectively. The key hydrolysis sites of AcEH were Asp192-His372-Glu346, which catalyzed the triad, and two conserved tyrosine residues, Tyr251/314. The mutations R49L and R49Y caused enzyme inactivation, while the mutation Y45L resulted in the formation of inactive inclusion bodies. The interaction network revealed that changes in the 49th amino acid residue disrupted the interactions between key active site residues, leading to enzyme inactivation. On the other hand, the alteration of the 45th amino acid residue destabilized the enzyme structure, leading to the formation of inclusion bodies. [Conclusion] This study discovered a novel EH and analyzed its hydrolysis mechanism. The findings provide valuable insights for further research and engineering on this enzyme.

    参考文献
    [1] HWANG S, CHOI YC, LEE YE. Bio- and chemo-catalytic preparations of chiral epoxides[J]. Journal of Industrial and Engineering Chemistry, 2010, 16(1): 1-6.
    [2] DUAN M, DÍAZ-OVIEDO CD, ZHOU Y, CHEN XY, YU PY, LIST B, HOUK KN, LAN Y. Chiral phosphoric acid catalyzed conversion of epoxides into thiiranes: mechanism, stereochemical model, and new catalyst design[J]. Angewandte Chemie International Edition, 2022, 61(9): e202113204.
    [3] LI J, LIU Y, REN WM, LU XB. Enantioselective terpolymerization of racemic and meso-epoxides with anhydrides for preparation of chiral polyesters[J]. Proceedings of the National Academy of Sciences of the United States of America, 2020, 117(27): 15429-15436.
    [4] HU FL, CHEN ZL, TAN Y, XU D, HUANG SL, JIA SQ, GONG XN, QIN WL, YAN HL. Organocatalytic enantioselective γ-elimination: applications in the preparation of chiral peroxides and epoxides[J]. Organic Letters, 2020, 22(5): 1934-1940.
    [5] LI J, REN BH, WAN ZQ, CHEN SY, LIU Y, REN WM, LU XB. Enantioselective resolution copolymerization of racemic epoxides and anhydrides: efficient approach for stereoregular polyesters and chiral epoxides[J]. Journal of the American Chemical Society, 2019, 141(22): 8937-8942.
    [6] MOSCHONA F, SAVVOPOULOU I, TSITOPOULOU M, TATARAKI D, RASSIAS G. Epoxide syntheses and ring-opening reactions in drug development[J]. Catalysts, 2020, 10(10): 1117.
    [7] YANG H, YU HX, STOLARZEWICZ IA, TANG WJ. Enantioselective transformations in the synthesis of therapeutic agents[J]. Chemical Reviews, 2023, 123(15): 9397-9446.
    [8] MAYNERT EW, FOREMAN RL, WATABE T. Epoxides as obligatory intermediates in the metabolism of olefins to glycols[J]. The Journal of Biological Chemistry, 1970, 245(20): 5234-5238.
    [9] HU B, HU D, ZHANG D, WEN Z, ZANG J, WU MC. Manipulating the regioselectivity of a Solanum lycopersicum epoxide hydrolase for the enantioconvergent synthesis of enantiopure alkane- and alkene-1,2-diols[J]. Catalysis Science & Technology, 2020, 10(17): 5886-5895.
    [10] JIANG JJ, WONG MK. Recent advances in the development of chiral gold complexes for catalytic asymmetric catalysis[J]. Chemistry-An Asian Journal, 2021, 16(5): 364-377.
    [11] ETAYO P, VIDAL-FERRAN A. Rhodium-catalysed asymmetric hydrogenation as a valuable synthetic tool for the preparation of chiral drugs[J]. Chemical Society Reviews, 2013, 42(2): 728-54.
    [12] YOON M, SRIRAMBALAJI R, KIM K. Homochiral metal-organic frameworks for asymmetric heterogeneous catalysis[J]. Chemical Reviews, 2012, 112(2): 1196-1231.
    [13] ROSSINO G, ROBESCU MS, LICASTRO E, TEDESCO C, MARTELLO I, MAFFEI L, VINCENTI G, BAVARO T, COLLINA S.渠捂敩???ぴちぬ????呼????ね???????戠牧?孥??崠??啯?丠????呴卨?????????佴啩?????圠啣????坬唠?坲????湊穝礮洠慃瑨楩捲?捬桩慴特愬挠琲攰爲椲稬愠琳椴漨渱?漩昺?愱?渰漳瘭攱水??匮??晲愾浛椱水祝??噉?故獒瑓敔牅慎猠敍??獇瑕?ぅ??映牁漬洠??楎?偂獅敒畇搠潄洮漠湓慴獲??楴??獥瀭???っ??楯湮?浲敥慬污睴潩牯浮?杨畩瑰?洠楯捦爠潥扰楯潸瑩慤孥?嵨???潯汬敡捳略汳攠獡??㈠ぴ????㈠?????????ㄠふ??戠物?嬠??嵯?卡呴佡??乳佩噳卛???????佣?剩???噡???????????卩?????坴?刬?′?????搱攸渰琰椨昳椩挺愠琳椱漶渭″愲渶搮?换慲琾慛氱礵瑝椠捇?灄牁潓灅攠牖瑐椬攠獋?潍時?湁敒眠?敍瀬漠硇楏摖敉?桄祗摁牒漠汓慐猬攠獒?晖牉漠测?瑍桁敒?杁攮渠潃浨楡捲?摣慴瑥慲?潺晡?獩潯楮氠?扥慶捥瑡敬牳椠慡嬠?嵵???湩究祥洠敥?慯湸摩??椠捨特潤扲楯慬污?呥攠捦桲湯潭氠漼杩社???ひ?ぷ??ㄠ?????べ??????扩爾?孷??嵨????传呡???????佴卯吠???婶??呴传???伭???匭??卯?乹周佥卸??????删唨????似???????慯捬畛瑊敝?嘠?割佯??味??卂?乯呣???佩??卲????丰??匬??匲????刴匸??伵???????匱伶啝娠???倣???※湋潏瘠敍氬?態湁摎?敁湋慏湖琦楁潡獣敵汴敥挻琠楋瘬攠?敒灏潎硓楋搦敁?档祵摴牥漻氠慈猬攠?晅牍潅浉??楒??猬瀠敒牏杓楅汎求畅獒?戠牍愮猠楅汰楯數湩獤楥猠??楤????味???????灴畩牰楯晴楥据慴瑩楡潬渠?慩湯摣?捴桡慬特慳捴瑳敛牊楝種愠瑉楮潴湥孲?嵡??偯牮潡瑬攠楊湯??确灡牬攠獯獦椠潍湯?慥湣摵?偡畲爠楓晣楩捥慮瑣楥潳測?′日????′?ㄨ?㈩????????????戱爷?嬠??嵕?塊啙?圠??塌啌?????偂?丬?????商?兒??坔唬?塏奅???渠慆測琠楁潒捁潎湄瘠敍爬朠敍湏瑗?桒祁摙爠潓汌礬猠楊獏?潅晓?獔瑁礮爠敓湴敲?散灴潵硲楥搠敯獦?戼祩 ̄湁敳睰汥祲?摩楬獬捵潳瘠敮物敧摥?攼瀯潩砾椠摥数?桸祩摤牥漠汨慹獤敲獯?楡湳?洠畡湴朠?戮攸愦湁孲?嵮?※传牲来慳湯楬捵??敯瑮琺攠物獭???っち?????????ㄠ?????ぴ??扣牴?孲??嵡?噤?书??佣佴??????丠????????剡?乩?????坣啲??佯?呡卬???????乯卦匠?买??????楨癹敤牲獯楬瑡祳?慳湛摊?戮椠潓捴慲瑵慣汴祵瑲楥挬?瀲漰琰攰測琠椸愨氲?漺映?攱瀱漭砱椲搲攮?桢祲搾牛漱永慝猠敃獈?楉搠敗湊琬椠晃楈敏摉?扃祙?朠敐湲潯浤敵?慴湩慯汮礠獯楦猠季?嵩???瀠灥汰楯數摩?慥湳携??湰癯楸物潤湥洠敨湹瑤慲汯??楳捥爭潣扡楴潡汬潹杺祥???のち????????????づ????????扳物?孛??崮???乯??塣?????奧??婡??丠??兯坰????乳?匠???奩?乥??婩卮????丰?‵???‰?渳愩渺琠椱漶猷攭氱攷挹琮椼癢敲 ̄桛礱搹牝漠汈祕獁楎獇?潒昬?獌瑉礠牃攬渠敚?潁硏椠摓敇?愠湌摉?戠救湔稬礠汌?杕氠祙挬椠摘祕汅?敚瑌栮攠牅?扡祮?慩?癣慯牮楶慥湲瑧?潮晴?敨灹潤硲楯摬敹?桩祳搠牯潦氠慲獡散?晭物潣洠??椲??杰牯潸浹祰捥敮獴?浮敥搠楡潮汤愠渱甬猲??楰?學?嵨???慮牥椠湢敹??牮甠来獮???づ????ㄠ???????????扨物?嬠??嵬?娼伯啩 ̄匠偳??婡??丠??奥???坰啲?关??坮?丠??婮???塬唠??夾偓????啴?婭兹???渠桦慲湡捤敩摡?挼愯瑩愾氠祥瑰楯捸?敤晥映楨捹楤敲湯捬祡?慥湛摊?攮渠慅湮瑺楹潭獥攠污敮捤琠楍癩楣瑲祯?潩晡?攠灔潥硣楨摮敯?桯祧摹爬漠氲愰猲攳?映爱漶洶??椱??朲爲漸戮愼换瑲放牛椲田浝?牚慏摃楈潅扒愠捆琬攠牅??楅??????扒礠?楍琬攠牂慏瑒楎癓敃?獅慕瑅畒爠慕瑔椬漠湈?浕畅瑒愠杂攬渠敓獃楈獍?晄漠牒???楁?剣??楯???敥灴楲捩档氠潡牳潳桡祹搠牳極湩?獡祢湬瑥栠敦獯楲猠孳?嵲???灩灮汧椠敥摰??楩捤牥漠扨楹潤汲潯杬祡?慥渠摡??楩潶瑩整捹桛湊潝氮漠杁祮???ぴ?????と????????????㈱??戹爬?嬳??崨″?唺???‵吭?丵????? ̄????????久?吠呃??十???塅?????丬?????坔問?????匠瑁攠牳数潥獣整汲敯捰瑨楯癴敯?桥祴摲物潣氠祡獳楳獡?漠晦?敲瀠潭硥楡摳敵獲?扮祧?牡敮噤爠?????慴?湮潧瘠敡汮??楰?噸楩杤湥愠?特慤摲楯慬瑡慳??楡??敩灶潩硴楹摛敊?栮礠摁牮潡汬慹獴敩?睡楬琠桂?桯楣杨桥?敩湳慴湲瑹椬漠猲攰氰攳挬琠椳瘱椴琨礱?漺爠?栳椵札栱?愱渮搼?捲漾浛瀲氲敝洠效湏瑌慍牑祕?牓敔朠楍漮猠敁汬数捨瑡椯癢楥瑴祡嬭?嵹???潬畡牳湥愠汦?潬晤??杮牺楹捭略汳琺甠牳慴汲?慣湴摵??潳漬搠??桮散浴楩獯瑮牳礠????????????????????????の??扐牲?孴??嵮?匦??买??偐???啩??删?乣??圀?一??匀???匀??刀???匀??????一??匀匀??匀?刀??一?????椀漀爀攀猀漀氀甀琀椀漀渀?漀昀?爀愀挀攀洀椀挀?瀀栀攀渀礀氀?最氀礀挀椀搀礀氀?攀琀栀攀爀?戀礀?愀?瀀甀琀愀琀椀瘀攀?爀攀挀漀洀戀椀渀愀渀琀?攀瀀漀砀椀搀攀?栀礀搀爀漀氀愀猀攀?昀爀漀洀??椀?匀琀爀攀瀀琀漀洀礀挀攀猀?最爀椀猀攀甀猀??椀??一?刀?????? 嬀?崀??圀漀爀氀搀??漀甀爀渀愀氀?漀昀??椀挀爀漀戀椀漀氀漀最礀??愀洀瀀???椀漀琀攀挀栀渀漀氀漀最礀??? ???????????????戀爀?嬀??崀??唀????圀?一??刀??匀???堀???夀??????圀唀?儀??圀唀???????唀??????椀渀攀琀椀挀?爀攀猀漀氀甀琀椀漀渀?漀昀?爀愀挀攀洀椀挀?猀琀礀爀攀渀攀?漀砀椀搀攀?愀琀?愀?栀椀最栀?挀漀渀挀攀渀琀爀愀琀椀漀渀?戀礀?爀攀挀漀洀戀椀渀愀渀琀??椀??猀瀀攀爀最椀氀氀甀猀?甀猀愀洀椀椀??椀??攀瀀漀砀椀搀攀?栀礀搀爀漀氀愀猀攀?椀渀?愀渀??椀?渀??椀??栀攀砀愀渀漀氀?戀甀昀昀攀爀?戀椀瀀栀愀猀椀挀?猀礀猀琀攀洀嬀?崀???漀甀爀渀愀氀?漀昀??椀漀琀攀挀栀渀漀氀漀最礀??? ??????????????????戀爀?嬀??崀?堀唀???????唀?娀儀??娀伀唀?匀倀??圀?一?一圀??娀?唀?圀夀??娀?唀?儀??娀??一??夀?????渀漀瘀攀氀?攀渀愀渀琀椀漀猀攀氀攀挀琀椀瘀攀?攀瀀漀砀椀搀攀?栀礀搀爀漀氀愀猀攀?昀爀漀洀??椀??最爀漀洀礀挀攀猀?洀攀搀椀漀氀愀渀甀猀??椀??娀???? ? ???挀氀漀渀椀渀最??挀栀愀爀愀挀琀攀爀椀稀愀琀椀漀渀?愀渀搀?愀瀀瀀氀椀挀愀琀椀漀渀嬀?崀??倀爀漀挀攀猀猀??椀漀挀栀攀洀椀猀琀爀礀??? ???????????? ???????戀爀?嬀??崀?圀唀?匀???????吀?????一?夀匀?????娀???渀愀渀琀椀漀猀攀氀攀挀琀椀瘀攀?栀礀搀爀漀氀礀猀椀猀?漀昀?爀愀挀攀洀椀挀?愀渀搀??椀??攀猀漀??椀??攀瀀漀砀椀搀攀猀?眀椀琀栀?爀攀挀漀洀戀椀渀愀渀琀??椀??猀挀栀攀爀椀挀栀椀愀?挀漀氀椀??椀??攀砀瀀爀攀猀猀椀渀最?攀瀀漀砀椀搀攀?栀礀搀爀漀氀愀猀攀?昀爀漀洀??椀?匀瀀栀椀渀最漀洀漀渀愀猀??椀??猀瀀???堀一??  ??瀀爀攀瀀愀爀愀琀椀漀渀?漀昀?攀瀀漀砀椀搀攀猀?愀渀搀?瘀椀挀椀渀愀氀?搀椀漀氀猀?椀渀?栀椀最栀??椀?攀攀??椀??愀渀搀?栀椀最栀?挀漀渀挀攀渀琀爀愀琀椀漀渀嬀?崀????匀??愀琀愀氀礀猀椀猀??? ???????????????????戀爀?嬀??崀???一匀伀一????倀???刀??一?????倀礀?漀搀????愀?挀漀洀瀀氀攀琀攀?猀甀椀琀攀?昀漀爀?猀琀爀甀挀琀甀爀愀氀?戀椀漀椀渀昀漀爀洀愀琀椀挀猀?椀渀?倀礀?伀?嬀?崀???椀漀椀渀昀漀爀洀愀琀椀挀猀??? ? ?????? ??????????????戀爀?嬀??崀??????一吀??????搀攀氀??伀一吀??????伀一娀伀一??????????一????????一?刀嘀?一?????倀?伀嘀?匀?一????吀伀匀?吀吀伀?匀????刀?一???? ??昀愀猀琀?最攀渀攀爀愀琀椀漀渀?漀昀?瀀爀漀戀愀戀椀氀椀猀琀椀挀?爀攀猀椀搀甀攀?椀渀琀攀爀愀挀琀椀漀渀?渀攀琀眀漀爀欀猀?昀爀漀洀?猀琀爀甀挀琀甀爀愀氀?攀渀猀攀洀戀氀攀猀嬀?崀??一甀挀氀攀椀挀??挀椀搀猀?刀攀猀攀愀爀挀栀??? ????? ?圀????圀????圀????
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朱美南,谷笑,柳得楷,张凌志,赵淑燕,张礼娟,张光亚,江伟. 一种新型环氧化物水解酶的发现及其催化机理的阐明[J]. 微生物学报, 2025, 65(1): 389-401

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  • 收稿日期:2024-09-08
  • 在线发布日期: 2025-01-04
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