Yaqin Sun, Wenjing Xia, Langjun Tang, Zhilong Xiu, Weiwu Jin, Xiaoyan Wang, Jin Tao, Haijun Liu, Hongyan An, Yi Li, Yi Tong
{"title":"Effects of thermophilic and acidophilic microbial consortia on maize wet-milling steeping.","authors":"Yaqin Sun, Wenjing Xia, Langjun Tang, Zhilong Xiu, Weiwu Jin, Xiaoyan Wang, Jin Tao, Haijun Liu, Hongyan An, Yi Li, Yi Tong","doi":"10.1186/s40643-024-00783-3","DOIUrl":"10.1186/s40643-024-00783-3","url":null,"abstract":"<p><p>To understand the ecology of species and promote biotechnology through beneficial strain selection for improving starch yield in maize wet-milling steeping, bacterial diversity and community structure during the counter-current steeping process in a commercial steeping system were characterized and investigated. The microbial diversity in the steeping liquor, which consisted of 16 phyla, 131 families, and 290 genera, was more abundant compared to those present on the surface of unsteeped maize. As the counter-current steeping progressed, exposing newer maize to the older steepwater, Lactobacillus dominated, replacing Rahnella, Pseudomonas, Pantoea, and Serratia. The thermophilic and acidophilic microbial consortia were enriched through adaptive evolution engineering and employed to improve starch yield. Several steeping strategies were evaluated, including water alone, SO<sub>2</sub> alone, mono-culture of B. coagulans, microbial consortia, and a combination of consortium and SO<sub>2</sub>. Combining the microbial consortium with SO<sub>2</sub> significantly increased the starch yield to, about 66.4 ± 0.5%, a 22% and 46% increase over SO<sub>2</sub> alone and the consortium alone, respectively. Scanning electron microscope (SEM) of steeped maize structure indicated that the combination of consortium and SO<sub>2</sub> disrupted the protein matrix and widened gaps between starch granules in maize endosperm. This released proteins into the steepwater and left starch granules in the aleurone layer. The steeping strategy of using thermophilic and acidophilic microbial consortium as additives shows potential application as an environmentally friendly alternative to conventional maize steeping procedures.</p>","PeriodicalId":9067,"journal":{"name":"Bioresources and Bioprocessing","volume":"11 1","pages":"68"},"PeriodicalIF":4.3,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11252109/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141619253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kai Wen, Sirui Wang, Yixin Sun, Mengsong Wang, Yingjiu Zhang, Jingxuan Zhu, Quanshun Li
{"title":"Mechanistic insights into the conversion of flavin adenine dinucleotide (FAD) to 8-formyl FAD in formate oxidase: a combined experimental and in-silico study.","authors":"Kai Wen, Sirui Wang, Yixin Sun, Mengsong Wang, Yingjiu Zhang, Jingxuan Zhu, Quanshun Li","doi":"10.1186/s40643-024-00782-4","DOIUrl":"10.1186/s40643-024-00782-4","url":null,"abstract":"<p><p>Formate oxidase (FOx), which contains 8-formyl flavin adenine dinucleotide (FAD), exhibits a distinct advantage in utilizing ambient oxygen molecules for the oxidation of formic acid compared to other glucose-methanol-choline (GMC) oxidoreductase enzymes that contain only the standard FAD cofactor. The FOx-mediated conversion of FAD to 8-formyl FAD results in an approximate 10-fold increase in formate oxidase activity. However, the mechanistic details underlying the autocatalytic formation of 8-formyl FAD are still not well understood, which impedes further utilization of FOx. In this study, we employ molecular dynamics simulation, QM/MM umbrella sampling simulation, enzyme activity assay, site-directed mutagenesis, and spectroscopic analysis to elucidate the oxidation mechanism of FAD to 8-formyl FAD. Our results reveal that a catalytic water molecule, rather than any catalytic amino acids, serves as a general base to deprotonate the C8 methyl group on FAD, thus facilitating the formation of a quinone-methide tautomer intermediate. An oxygen molecule subsequently oxidizes this intermediate, resulting in a C8 methyl hydroperoxide anion that is protonated and dissociated to form OHC-RP and OH<sup>-</sup>. During the oxidation of FAD to 8-formyl FAD, the energy barrier for the rate-limiting step is calculated to be 22.8 kcal/mol, which corresponds to the required 14-hour transformation time observed experimentally. Further, the elucidated oxidation mechanism reveals that the autocatalytic formation of 8-formyl FAD depends on the proximal arginine and serine residues, R87 and S94, respectively. Enzymatic activity assay validates that the mutation of R87 to lysine reduces the k<sub>cat</sub> value to 75% of the wild-type, while the mutation to histidine results in a complete loss of activity. Similarly, the mutant S94I also leads to the deactivation of enzyme. This dependency arises because the nucleophilic OH<sup>-</sup> group and the quinone-methide tautomer intermediate are stabilized through the noncovalent interaction provided by R87 and S94. These findings not only explain the mechanistic details of each reaction step but also clarify the functional role of R87 and S94 during the oxidative maturation of 8-formyl FAD, thereby providing crucial theoretical support for the development of novel flavoenzymes with enhanced redox properties.</p>","PeriodicalId":9067,"journal":{"name":"Bioresources and Bioprocessing","volume":"11 1","pages":"67"},"PeriodicalIF":4.3,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11236828/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141562649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Cultivation of earthworms and analysis of associated bacterial communities during earthworms' growth using two types of agricultural wastes.","authors":"Feng Qian, Fuzhi Lu, Liping Yang, Tingkao Li","doi":"10.1186/s40643-024-00781-5","DOIUrl":"10.1186/s40643-024-00781-5","url":null,"abstract":"<p><p>Earthworm cultivation can effectively promote the resource utilization of agricultural waste. The efficient utilization of agricultural waste by earthworms mainly depends on the microbial communities in the guts. This study used silkworm excrement and cow manure as substrates for earthworm cultivation and investigated the associated bacterial communities during earthworms' growth. The survival rate of earthworms remained above 89% after 21 days of feeding with the two substrates. Proteobacteria, Actinobacteria, and Firmicutes constituted the predominant bacterial communities in earthworm growth, accounting for over 81% of the relative abundance in both guts and vermicompost. The bacteria richness and diversity in the foregut and midgut of earthworm were lower than those in the hindgut. The prediction function of intestinal bacterial communities of earthworms cultured with two substrates mainly involved biosynthesis, decomposition and energy production.</p>","PeriodicalId":9067,"journal":{"name":"Bioresources and Bioprocessing","volume":"11 1","pages":"66"},"PeriodicalIF":4.3,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11233487/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141557982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Segun E Ibitoye, Chanchal Loha, Rasheedat M Mahamood, Tien-Chien Jen, Meraj Alam, Ishita Sarkar, Partha Das, Esther T Akinlabi
{"title":"An overview of biochar production techniques and application in iron and steel industries.","authors":"Segun E Ibitoye, Chanchal Loha, Rasheedat M Mahamood, Tien-Chien Jen, Meraj Alam, Ishita Sarkar, Partha Das, Esther T Akinlabi","doi":"10.1186/s40643-024-00779-z","DOIUrl":"10.1186/s40643-024-00779-z","url":null,"abstract":"<p><p>Integrating innovation and environmental responsibility has become important in pursuing sustainable industrial practices in the contemporary world. These twin imperatives have stimulated research into developing methods that optimize industrial processes, enhancing efficiency and effectiveness while mitigating undesirable ecological impacts. This objective is exemplified by the emergence of biochar derived from the thermo-chemical transformation of biomass. This review examines biochar production methods and their potential applications across various aspects of the iron and steel industries (ISI). The technical, economic, and sustainable implications of integrating biochar into the ISI were explored. Slow pyrolysis and hydrothermal carbonization are the most efficient methods for higher biochar yield (25-90%). Biochar has several advantages- higher heating value (30-32 MJ/kg), more porosity (58.22%), and significantly larger surface area (113 m<sup>2</sup>/g) compared to coal and coke. However, the presence of biochar often reduces fluidity in a coal-biochar mixture. The findings highlighted that biochar production and implementation in ISI often come with higher costs, primarily due to the higher expense of substitute fuels compared to traditional fossil fuels. The economic viability and societal desirability of biochar are highly uncertain and vary significantly based on factors such as location, feedstock type, production scale, and biochar pricing, among others. Furthermore, biomass and biochar supply chain is another important factor which determines its large scale implementation. Despite these challenges, there are opportunities to reduce emissions from BF-BOF operations by utilizing biochar technologies. Overall, the present study explored integrating diverse biochar production methods into the ISI aiming to contribute to the ongoing research on sustainable manufacturing practices, underscoring their significance in shaping a more environmentally conscious future.</p>","PeriodicalId":9067,"journal":{"name":"Bioresources and Bioprocessing","volume":"11 1","pages":"65"},"PeriodicalIF":4.3,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11222365/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141497063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Regioselective and enantioselective propargylic hydroxylations catalyzed by P450tol monooxygenases.","authors":"Xu Deng, Cheng-Cheng Song, Wen-Jing Gu, Yu-Jie Wang, Lu Feng, Xiao-Jian Zhou, Ming-Qiang Zhou, Wei-Cheng Yuan, Yong-Zheng Chen","doi":"10.1186/s40643-024-00771-7","DOIUrl":"10.1186/s40643-024-00771-7","url":null,"abstract":"<p><p>Regioselective and enantioselective hydroxylation of propargylic C-H bonds are useful reactions but often lack appropriate catalysts. Here a green and efficient asymmetric hydroxylation of primary and secondary C-H bonds at propargylic positions has been established. A series of optically active propargylic alcohols were prepared with high regio- and enantioselectivity (up to 99% ee) under mild reaction conditions by using P450tol, while the C≡C bonds in the molecule remained unreacted. This protocol provides a green and practical method for constructing enantiomerically chiral propargylic alcohols. In addition, we also demonstrated that the biohydroxylation strategy was able to scaled up to 2.25 mmol scale with the production of chiral propargyl alcohol 2a at a yield of 196 mg with 96% ee, which's an important synthetic intermediate of antifungal drug Ravuconazole.</p>","PeriodicalId":9067,"journal":{"name":"Bioresources and Bioprocessing","volume":"11 1","pages":"64"},"PeriodicalIF":4.3,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11219674/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141490814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nur Farahah Mohd Khairuddin, Nadeem Khan, Saravanan Sankaran, Wasif Farooq, Irshad Ahmad, Isam H Aljundi
{"title":"Correction: Produced water treatment by semi-continuous sequential bioreactor and microalgae photobioreactor.","authors":"Nur Farahah Mohd Khairuddin, Nadeem Khan, Saravanan Sankaran, Wasif Farooq, Irshad Ahmad, Isam H Aljundi","doi":"10.1186/s40643-024-00778-0","DOIUrl":"10.1186/s40643-024-00778-0","url":null,"abstract":"","PeriodicalId":9067,"journal":{"name":"Bioresources and Bioprocessing","volume":"11 1","pages":"63"},"PeriodicalIF":4.3,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11219776/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141490813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Souad Maache, Hassan Laaroussi, Najoua Soulo, Ghizlane Nouioura, Nabil Boucetta, Mohammed Bouslamti, Hamza Saghrouchni, Yousef A Bin Jardan, Samir Ibenmoussa, Mohammed Bourhia, Badiaa Lyoussi, Ilham Elarabi
{"title":"The antioxidant, antidiabetic, and antihyperlipidemic effects of the polyphenolic extract from Salvia blancoana subsp. mesatlantica on induced diabetes in rats.","authors":"Souad Maache, Hassan Laaroussi, Najoua Soulo, Ghizlane Nouioura, Nabil Boucetta, Mohammed Bouslamti, Hamza Saghrouchni, Yousef A Bin Jardan, Samir Ibenmoussa, Mohammed Bourhia, Badiaa Lyoussi, Ilham Elarabi","doi":"10.1186/s40643-024-00769-1","DOIUrl":"10.1186/s40643-024-00769-1","url":null,"abstract":"<p><p>Currently, several studies have demonstrated the benefits of medicinal plants in managing type 2 diabetes. In this work, we evaluated the beneficial effects of the polyphenolic extract (PESB) from Salvia blancoana subsp. mesatlantica in the management of hypercaloric-feeding and small-dose alloxan-brought type 2 diabetes in rats. We analyzed the chemical constituents of the extract, including flavones and flavonols content, to understand its biological action. The antioxidant activities were evaluated by total antioxidant action, scavenging effect of the free radical DPPH, and reducing power. The obtained results showed that the value of TFC was estimated at 31.90 ± 0.34 mgEQ/g in the PESB extract. The total antioxidant capacity was estimated at 593.51 ± 4.09 mg (EAA)/g, the value of DPPH IC<sub>50</sub> was 7.3 ± 0.00 μg/mL, and the value of EC<sub>50</sub> of reducing power was estimated at 6.43 ± 0.01 μg/mL. In total, 14 phenolic compounds were identified and the naringin was the most dominant (63.19%) while the vanillin was the less recorded (0.10%). Serum glucose decreased significantly (p < 0.05) in rats given PESB (100 mg/kg) after four weeks. Glibenclamide (GLB) and PESB reduced HbA1c and increased plasma insulin in diabetic rats, restoring HOMA-β and HOMA-IR levels to near-normal. Additionally, diabetic rats treated with GLB or PESB showed statistically equivalent results to those of non-diabetic rats regarding hepatic enzymes, renal and lipid markers, as well as cardiovascular indices. The weight loss was significantly lower in diabetic rats receiving a dose of PESB (100 mg/kg), and GLB compared to corresponding untreated diabetic rats (p < 0.01). PESB and GLB showed a prominent protective function in the pancreas, liver, and kidney tissues. This investigation demonstrates the capacity of extracts from leaves of S. blancoana subsp. mesatlantica to manage diabetes mellitus due to their richness in a wide range of bioactive compounds. Therefore, more investigations are required to estimate the safety of the plant use.</p>","PeriodicalId":9067,"journal":{"name":"Bioresources and Bioprocessing","volume":"11 1","pages":"62"},"PeriodicalIF":4.3,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11208370/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141455265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mengkai Hu, Jun Liu, Yufei Gan, Hao Zhu, Rumeng Han, Kun Liu, Yan Liu, Ming Zhao, Xiangfei Li, Zhenglian Xue
{"title":"N-terminal truncated phospholipase A1 accessory protein PlaS from Serratia marcescens alleviates inhibitory on host cell growth and enhances PlaA1 enzymatic activity.","authors":"Mengkai Hu, Jun Liu, Yufei Gan, Hao Zhu, Rumeng Han, Kun Liu, Yan Liu, Ming Zhao, Xiangfei Li, Zhenglian Xue","doi":"10.1186/s40643-024-00777-1","DOIUrl":"10.1186/s40643-024-00777-1","url":null,"abstract":"<p><p>Phospholipase A1 (PLA1) is a kind of specific phospholipid hydrolase widely used in food, medical, textile. However, limitations in its expression and enzymatic activity have prompted the investigation of the phospholipase-assisting protein PlaS. In this study, we elucidate the role of PlaS in enhancing the expression and activity of PlaA1 through N-terminal truncation. Our research demonstrates that truncating the N-terminal region of PlaS effectively overcomes its inhibitory effect on host cells, resulting in improved cell growth and increased protein solubility of the protein. The yeast two-hybrid assay confirms the interaction between PlaA1 and N-terminal truncated PlaS (∆N27 PlaS), highlighting their binding capabilities. Furthermore, in vitro studies using Biacore analysis reveal a concentration-dependent and specific binding between PlaA1 and ∆N27 PlaS, exhibiting high affinity. Molecular docking analysis provides insights into the hydrogen bond interactions between ∆N27 PlaS and PlaA1, identifying key amino acid residues crucial for their binding. Finally, the enzyme activity of PLA1 was boost to 8.4 U/mL by orthogonal test. Study significantly contributes to the understanding of the interaction mechanism between PlaS and PlaA1, offering potential strategies for enhancing PlaA1 activity through protein engineering approaches.</p>","PeriodicalId":9067,"journal":{"name":"Bioresources and Bioprocessing","volume":"11 1","pages":"61"},"PeriodicalIF":4.3,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11199421/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141445401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mohamed A Al Abboud, Abdullah Mashraqi, Husam Qanash, Hattan S Gattan, Hashim R Felemban, Faeza Alkorbi, Mohamed M Alawlaqi, Tarek M Abdelghany, Hanan Moawad
{"title":"Green biosynthesis of bimetallic ZnO@AuNPs with its formulation into cellulose derivative: biological and environmental applications.","authors":"Mohamed A Al Abboud, Abdullah Mashraqi, Husam Qanash, Hattan S Gattan, Hashim R Felemban, Faeza Alkorbi, Mohamed M Alawlaqi, Tarek M Abdelghany, Hanan Moawad","doi":"10.1186/s40643-024-00759-3","DOIUrl":"10.1186/s40643-024-00759-3","url":null,"abstract":"<p><p>Nanoparticles (NPs) formulation in biopolymers is an attractive process for the researcher to decrease the disadvantages of NPs application alone. Bimetallic NPs are a promising formula of two NPs that usually act as synergetic phenomena. Zinc oxide and gold NPs (ZnO@AuNPs) biosynthesis as a bimetallic was prepared via the eco-friendly manner currently. Carboxymethylcellulose (CMC) was employed for the formulation of ZnO@AuNPs as a nanocomposite via a green method. Physicochemical and topographical characterization was assigned to ZnO@AuNPs and nanocomposite features. The nanostructure of bimetallic NPs and nanocomposite were affirmed with sizes around 15 and 25 nm, respectively. Indeed, the DLS measurements affirmed the more reasonable size and stability of the prepared samples as 27 and 93 nm for bimetallic NPs and nanocomposite, respectively. The inhibitory potential of nanocomposite was more than ZnO@AuNPs against Staphylococcus aureus, Escherichia coli, Salmonella typhi, Enterococcus faecalis, Mucor albicans, Aspergillus flavus, and Mucor circinelloid. ZnO@AuNPs and nanocomposite exhibited antioxidant activity via DPPH with IC<sub>50</sub> of 71.38 and 32.4 µg/mL, correspondingly. Excellent anti-diabetic potential of nanocomposite with IC<sub>50</sub> of 7.4 µg/mL, and ZnO@AuNPs with IC<sub>50</sub> of 9.7 µg/mL was reported compared with the standard acarbose with the IC<sub>50</sub> of 50.93 µg/mL for amylase inhibition (%). Photocatalytic degradation of RR195 and RB dyes was performed by ZnO@AuNPs and nanocomposite, where maximum degradation was 85.7 ± 1.53 and 88.7 ± 0.58%, respectively using ZnO@AuNPs, 90.3 ± 0.28 and 91.8 ± 0.27%, respectively using nanocomposite at 100 min.</p>","PeriodicalId":9067,"journal":{"name":"Bioresources and Bioprocessing","volume":"11 1","pages":"60"},"PeriodicalIF":4.6,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11183018/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141330388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Discovery, characterization and mechanism of a Microbacterium esterase for key d-biotin chiral intermediate synthesis.","authors":"Xinjia Li, Haoran Yu, Shengli Liu, Baodi Ma, Xiaomei Wu, Xuesong Zheng, Yi Xu","doi":"10.1186/s40643-024-00776-2","DOIUrl":"10.1186/s40643-024-00776-2","url":null,"abstract":"<p><p>Esterases are crucial biocatalysts in chiral compound synthesis. Herein, a novel esterase EstSIT01 belonging to family V was identified from Microbacterium chocolatum SIT101 through genome mining and phylogenetic analysis. EstSIT01 demonstrated remarkable efficiency in asymmetrically hydrolyzing meso-dimethyl ester [Dimethyl cis-1,3-Dibenzyl-2-imidazolidine-4,5-dicarboxyate], producing over 99% yield and 99% enantiomeric excess (e.e.) for (4S, 5R)-monomethyl ester, a crucial chiral intermediate during the synthesis of d-biotin. Notably, the recombinant E. coli expressing EstSIT01 exhibited over 40-fold higher activity than that of the wild strain. EstSIT01 displays a preference for short-chain p-NP esters. The optimal temperature and pH were 45 °C and 10.0, with K<sub>m</sub> and k<sub>cat</sub> values of 0.147 mmol/L and 5.808 s<sup>- 1</sup>, respectively. Molecular docking and MD simulations suggest that the high stereoselectivity for meso-diester may attribute to the narrow entrance tunnel and unique binding pocket structure. Collectively, EstSIT01 holds great potential for preparing chiral carboxylic acids and esters.</p>","PeriodicalId":9067,"journal":{"name":"Bioresources and Bioprocessing","volume":"11 1","pages":"59"},"PeriodicalIF":4.6,"publicationDate":"2024-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11180644/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141327179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}