Yeast最新文献 - Book学术

Effects of Backslopping on Yeast Diversity and the Volatile Profile of Tarhana. 倒灌对酒花酵母多样性及挥发性特征的影响。

IF 2.6 4区生物学

Yeast Pub Date : 2025-10-09 DOI: 10.1002/yea.70003

Burcu Ozel, Bilal Agirman, Omer Simsek, Huseyin Erten

{"title":"Effects of Backslopping on Yeast Diversity and the Volatile Profile of Tarhana.","authors":"Burcu Ozel, Bilal Agirman, Omer Simsek, Huseyin Erten","doi":"10.1002/yea.70003","DOIUrl":"https://doi.org/10.1002/yea.70003","url":null,"abstract":"The primary challenge in tarhana production is the occurrence of spontaneous fermentation, which leads to non-standardized products. Thus, we investigated the effects of backslopping, a traditional method for inoculating fermented foods, on the yeast and volatile aroma compound diversity of tarhana dough. Backslopping fermentations were conducted at different temperatures (25°C and 30°C), pHs (3.70 and 4.00), and inoculation rates (5%, 10%, and 15%). The results revealed that the fermentation temperature and pH significantly influenced the diversity of yeast species and the volatile compound profile of the tarhana dough. However, despite some variations in the PCR-DGGE profiles, the metagenomic analysis revealed that the inoculation rate had minimal effect on yeast diversity, with species diversity remaining relatively constant over the cycles. Kazachstania humilis, Kazachstania bulderi, and Pichia kluyveri were the most prevalent yeast species across all experimental conditions. Pichia membranifaciens was exclusively detected in doughs fermented at 25°C and pH 4.00, whereas Saccharomyces cerevisiae was observed only in doughs fermented at 30°C. Tarhana doughs had a wide range of volatile compounds, the most abundant of which were terpenes and terpenoids, followed by esters, alcohols, aldehydes, and phenols. Doughs fermented at 25°C and pH 3.70 were differentiated from other groups, particularly for their content of esters (e.g., ethyl acetate, ethyl lactate, ethyl decanoate, and ethyl octanoate) and alcohols (e.g., ethyl alcohol, isobutyl alcohol, benzyl alcohol). This study highlights the direct influence of backslopping on yeast diversity and its indirect impact on the aroma profile of tarhana dough, providing insights into the optimization of fermentation conditions for improved product standardization.","PeriodicalId":23870,"journal":{"name":"Yeast","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145259465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Taxogenomic Analysis of a Novel Yeast Species, Lachancea rosae Sp. Nov. F.A., Isolated From the Wild Rose Rosa californica. 从加州野蔷薇中分离的一种新酵母菌Lachancea rosae Sp. Nov. fa的分类基因组学分析。

IF 2.6 4区生物学

Yeast Pub Date : 2025-09-01 DOI: 10.1002/yea.70000

Yakendra Bajgain, Quinn K Langdon, Cara M Krien, Martin Jarzyna, Kelly V Buh, Max A B Haase, Anthony Pasles, John F Wolters, Marizeth Groenewald, Chris Todd Hittinger, Dana A Opulente

{"title":"Taxogenomic Analysis of a Novel Yeast Species, Lachancea rosae Sp. Nov. F.A., Isolated From the Wild Rose Rosa californica.","authors":"Yakendra Bajgain, Quinn K Langdon, Cara M Krien, Martin Jarzyna, Kelly V Buh, Max A B Haase, Anthony Pasles, John F Wolters, Marizeth Groenewald, Chris Todd Hittinger, Dana A Opulente","doi":"10.1002/yea.70000","DOIUrl":"https://doi.org/10.1002/yea.70000","url":null,"abstract":"A novel Saccharomycotina yeast strain, yHQL494, was isolated from the rose hip of the wild rose Rosa californica from Castle Crags State Park, California, USA. Phylogenetic analyses of both whole genome data and the sequences from the D1/D2 region of the large ribosomal subunit (LSU) rRNA gene placed strain yHQL494 within the genus Lachancea and grouped it into a clade with Lachancea lanzarotensis and Lachancea meyersii. Taxogenomic analyses were conducted on publicly available genome sequences to gain a deeper insight into the carbon and nitrogen gene-trait associations across the Lachancea clade. The results of these analyses were found to be consistent across Lachancea species. Growth assays and microscopic analyses were conducted to determine the physiological characteristics of strain yHQL494, including the presence of hyphae or pseudohyphae, ascospore formation, fermentation abilities, and assimilation of carbon and nitrogen compounds. Based on the phenotypic and genomic characteristics of the strain yHQL494T (=NRRL Y-64858T, =CBS 18,574T), we propose a new species, Lachancea rosae sp. nov. f.a.","PeriodicalId":23870,"journal":{"name":"Yeast","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144971543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sucrose-Induced Transcriptomic Response in Ogataea polymorpha TBRC 4839 Reveals its Potential for Recombinant Protein Production. 蔗糖诱导的多形Ogataea TBRC 4839转录组反应揭示了其重组蛋白生产的潜力

IF 2.6 4区生物学

Yeast Pub Date : 2025-09-01 Epub Date: 2025-09-24 DOI: 10.1002/yea.70001

Somsak Likhitrattanapisal, Chitwadee Phithakrotchanakoon, Aekkachai Puseenam, Paopit Siriarchawatana, Natta Wiriyakun, Jiraprapa Nirapun, Warasirin Sornlek, Supawadee Ingsriswang, Niran Roongsawang

{"title":"Sucrose-Induced Transcriptomic Response in Ogataea polymorpha TBRC 4839 Reveals its Potential for Recombinant Protein Production.","authors":"Somsak Likhitrattanapisal, Chitwadee Phithakrotchanakoon, Aekkachai Puseenam, Paopit Siriarchawatana, Natta Wiriyakun, Jiraprapa Nirapun, Warasirin Sornlek, Supawadee Ingsriswang, Niran Roongsawang","doi":"10.1002/yea.70001","DOIUrl":"10.1002/yea.70001","url":null,"abstract":"The thermotolerant yeast Ogataea polymorpha TBRC 4839 is a promising host for heterologous protein expression using sucrose and molasses as low-cost carbon sources, making it suitable for industrial applications. This study analyzed the genome and transcriptome of O. polymorpha under sucrose-induced conditions. The nuclear genome of strain TBRC 4839 measures 8.9 Mbp with a GC content of 47.87%, consistent with other Ogataea species. The genome encodes 5184 protein-coding genes, comparable to related strains. Additionally, the mitochondrial genome spans 49.4 Kbp and has a low GC content of approximately 20%. Transcriptomic analysis revealed that sucrose induction triggers a metabolic shift characterized by increased carbohydrate metabolism and decreased amino acid biosynthesis, stress signaling, and cell division, enabling efficient energy utilization in sucrose-rich environments. Among the identified genes with up-regulated expression, five were notable: FUN_000066 (hypothetical protein), FUN_001144 (maltose permease), FUN_001145 (maltase), FUN_002060 (mitochondrial NAD-dependent malic enzyme), and FUN_002263 (hypothetical protein). The promoter efficiency was evaluated by expressing the fungal xylanase gene under sucrose-inducing conditions using these promoters. The maltase (MAL) promoter exhibited the highest xylanase production efficiency, outperforming other promoters. Furthermore, the MAL promoter proved effective for xylanase production when molasses was used as the carbon source. These findings underscore the potential of O. polymorpha TBRC 4839 and the MAL promoter for industrial protein production.","PeriodicalId":23870,"journal":{"name":"Yeast","volume":" ","pages":"181-194"},"PeriodicalIF":2.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145132130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploiting the Geranylgeranyl-Pyrophosphate-Sensing N-Terminal Domain of HMG-CoA Reductase 2 to Regulate Farnesyl Pyrophosphate Synthase (Erg20p) for Improved Monoterpene Production in Saccharomyces cerevisiae. 利用HMG-CoA还原酶2的香叶基焦磷酸传感n端结构域调控法尼基焦磷酸合成酶（Erg20p）以提高酿酒酵母单萜的产量。

IF 2.6 4区生物学

Yeast Pub Date : 2025-09-01 Epub Date: 2025-07-21 DOI: 10.1002/yea.4005

Zeyu Lu, Samuel Evans, Liam McDonnell, Naga Chandra Bandari, Yilun Weng, Wanli Jin, Robert Speight, Gerhard Schenk, Christopher B Howard, Claudia E Vickers, Bingyin Peng

{"title":"Exploiting the Geranylgeranyl-Pyrophosphate-Sensing N-Terminal Domain of HMG-CoA Reductase 2 to Regulate Farnesyl Pyrophosphate Synthase (Erg20p) for Improved Monoterpene Production in Saccharomyces cerevisiae.","authors":"Zeyu Lu, Samuel Evans, Liam McDonnell, Naga Chandra Bandari, Yilun Weng, Wanli Jin, Robert Speight, Gerhard Schenk, Christopher B Howard, Claudia E Vickers, Bingyin Peng","doi":"10.1002/yea.4005","DOIUrl":"10.1002/yea.4005","url":null,"abstract":"Dynamic downregulation of the endogenous farnesyl pyrophosphate (FPP) synthase (Erg20p) is crucial to engineer heterologous monoterpene production in the yeast Saccharomyces cerevisiae. FPP downstream metabolite geranylgeranyl pyrophosphate (GGPP) can induce the degradation of 3-hydroxy-3-methylglutaryl (HMG)-CoA reductase 2 (Hmg2p) through its N-terminal GGPP-sensing endoplasmic reticulum transmembrane domain (Hmg2pN) in S. cerevisiae. Here, we investigate the use of Hmg2pN to regulate Erg20p, aiming to restrict FPP synthesis and redirect metabolic flux to monoterpene production. While using the ERG1 promoter to regulate ERG20 transcription improved monoterpene limonene by ~10-fold, combinatory fusion of Hmg2pN to Erg20p N-terminus further improved limonene production by 40% to 0.52 g L-1 in synthetic minimal media. This approach yielded 0.5 g L-1 geraniol in batch cultivation, comparable to levels achieved using the N-end-rule degron K3K15 or an auxin-inducible degron to regulate Erg20p. In rich complex media, this approach was superior, leading to 2.1 g L-1 geraniol production in semi-fed batch cultivation. In summary, the Hmg2pN domain is an efficient tool to constrain FPP synthesis for improved monoterpene production in S. cerevisiae.","PeriodicalId":23870,"journal":{"name":"Yeast","volume":" ","pages":"169-180"},"PeriodicalIF":2.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144675935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CRISPR/Cas9-Mediated Construction of a YPS Gene-Deficient Komagataella phaffii Strain for Enhanced Expression of BIAP Ⅱ. CRISPR/ cas9介导的YPS基因缺陷Komagataella phaffii菌株的构建增强BIAP表达Ⅱ。

IF 2.6 4区生物学

Yeast Pub Date : 2025-09-01 Epub Date: 2025-09-24 DOI: 10.1002/yea.70002

Haichao Li, Ping Gui, Xiao Li, Yanna Lin, Zhenyu Ma, Haili Yu, Fuqiang Ma

{"title":"CRISPR/Cas9-Mediated Construction of a YPS Gene-Deficient Komagataella phaffii Strain for Enhanced Expression of BIAP Ⅱ.","authors":"Haichao Li, Ping Gui, Xiao Li, Yanna Lin, Zhenyu Ma, Haili Yu, Fuqiang Ma","doi":"10.1002/yea.70002","DOIUrl":"10.1002/yea.70002","url":null,"abstract":"Multiple isoforms of bovine intestinal alkaline phosphatase (BIAP) have been identified, among which type Ⅱ (BIAP Ⅱ) exhibits the highest specific activity. While Komagataella phaffii has been successfully employed for the secretory expression of recombinant BIAP Ⅱ, substantial proteolytic degradation during the secretion and expression processes has been observed, leading to reduced protein yield and challenging purification procedures. Our investigation demonstrates that the proteolytic cleavage of BIAP Ⅱ is predominantly mediated by secretory pathway proteases, particularly the aspartic protease yapsin (Yps), with Yps1 playing a crucial role. Genetic disruption of the YPS1 gene resulted in a remarkable 2.5-fold increase in BIAP Ⅱ production yield compared to the parental strain, accompanied by significantly reduced proteolytic degradation. Through detailed analysis, we have identified the Yps1 cleavage site within the BIAP Ⅱ peptide chain, located between Lys137 and Lys138. To further minimize BIAP Ⅱ proteolysis, we developed a YPS multigene-deficient engineered strain using CRISPR/Cas9-mediated triple gene editing technology. Additionally, we have established a novel dual-color quantitative PCR (DC-qPCR) method that enables rapid and precise determination of target gene dosage, thereby enhancing screening efficiency while reducing experimental errors associated with repeated sample processing. The strategies and methodologies developed in this study may serve as a valuable reference for optimizing the expression of various secretory heterologous proteins in Komagataella phaffii.","PeriodicalId":23870,"journal":{"name":"Yeast","volume":" ","pages":"195-205"},"PeriodicalIF":2.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145132133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cooperative Function of Atg8- and TORC1-Mediated Activities in Yeast. 酵母中Atg8-和torc1介导活性的协同功能。

IF 2.6 4区生物学

Yeast Pub Date : 2025-09-01 Epub Date: 2025-06-26 DOI: 10.1002/yea.4003

Yumiko Oba, Miyuki Higuchi, Naoka Takahashi, Haruko Katsuta, Naoki Koike, Takashi Ushimaru, Yoko Kimura

{"title":"Cooperative Function of Atg8- and TORC1-Mediated Activities in Yeast.","authors":"Yumiko Oba, Miyuki Higuchi, Naoka Takahashi, Haruko Katsuta, Naoki Koike, Takashi Ushimaru, Yoko Kimura","doi":"10.1002/yea.4003","DOIUrl":"10.1002/yea.4003","url":null,"abstract":"The target of rapamycin complex 1 (TORC1) protein kinase plays an important role in regulating various cellular activities in response to nutrient availability. In this study, an autophagy-related protein 8 (atg8) mutant of Saccharomyces cerevisiae was highly sensitive to cellular processes in which TORC1 activity was inhibited by rapamycin treatment or by a mutated allele of KOG1 which encodes a subunit of TORC1. Atg8 exhibits both lipidation-dependent and -independent activities, each involving distinct factors. Lipidation of Atg8 is necessary for autophagy and functions with autophagy-related proteins like Atg7, whereas the lipidation-independent activities of Atg8 require Hfl1. The atg7Δhfl1Δ double mutant exhibited defects for the impaired TORC1 activities, suggesting that both lipidation-dependent and -independent functions of Atg8 are required for survival during impaired TORC1 activity. Moreover, atg8Δ and atg7Δhfl1Δ mutants exhibited sensitivity to metal ion Zn2+ during low-dose rapamycin treatment. The results suggest that Atg8-mediated functions and TORC1 signaling events play an important role in cell growth, possibly by maintaining vacuole integrity.","PeriodicalId":23870,"journal":{"name":"Yeast","volume":" ","pages":"161-168"},"PeriodicalIF":2.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12511908/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144498189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cytoduction Preserves Genetic Diversity Following Plasmid Transfer Into Pooled Yeast Libraries. 质粒转入酵母文库后，细胞传导保留了遗传多样性。

IF 2.6 4区生物学

Yeast Pub Date : 2025-06-01 Epub Date: 2025-04-07 DOI: 10.1002/yea.4001

Han-Ying Jhuang, Dimitra Aggeli, Gregory I Lang

{"title":"Cytoduction Preserves Genetic Diversity Following Plasmid Transfer Into Pooled Yeast Libraries.","authors":"Han-Ying Jhuang, Dimitra Aggeli, Gregory I Lang","doi":"10.1002/yea.4001","DOIUrl":"10.1002/yea.4001","url":null,"abstract":"Introducing plasmids into yeast is a critical step for many phenotypic assays and genetic engineering applications. However, it is often challenging for applications that involve large pools of variants because the population structure can be easily altered by traditional methods such as chemical transformation. In this study, we introduce drug-marked plasmids into a heterogeneous yeast population using both transformation and cytoduction (mating without nuclear fusion). Using a highly diverse barcoded yeast collection, we quantify the efficiency of both methods. We demonstrate that for cytoduction, but not transformation, nearly all the genotypes in the initial pool were detected in the final pool, with a high correlation to their initial frequencies. Finally, we map QTL that impact both cytoduction and transformation. Overall, we demonstrate the efficiency of cytoduction as a means of introducing plasmids into yeast. This is significant because it provides a means of manipulating diverse yeast populations, such as pools constructed for bulk segregant analysis, deep mutational scanning, large-scale gene editing, or populations from long-term evolution experiments.","PeriodicalId":23870,"journal":{"name":"Yeast","volume":" ","pages":"126-131"},"PeriodicalIF":2.6,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12232603/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143796459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Investigation of TDA1 Deficiency in Saccharomyces cerevisiae During Diauxic Growth. 酿酒酵母生长过程中TDA1缺乏的研究。

IF 2.6 4区生物学

Yeast Pub Date : 2025-06-01 Epub Date: 2025-06-26 DOI: 10.1002/yea.4004

Erik Y Bjurström, Praphapan Lasin, Daniel Brunnsåker, Ievgeniia A Tiukova, Ross D King

{"title":"An Investigation of TDA1 Deficiency in Saccharomyces cerevisiae During Diauxic Growth.","authors":"Erik Y Bjurström, Praphapan Lasin, Daniel Brunnsåker, Ievgeniia A Tiukova, Ross D King","doi":"10.1002/yea.4004","DOIUrl":"10.1002/yea.4004","url":null,"abstract":"Tda1p is a protein kinase in Saccharomyces cerevisiae. Here we investigate the function of TDA1 during the diauxic shift using transcriptomics. We compared the gene expression in the deletion mutant tda1∆ and the reference strain (BY4741) during both the aerobic fermentation phase (log phase), and the respiratory phase (post-diauxic shift phase, PDS) in three separate independent experiments. We found: Differential gene expression analysis showed that compared to the reference strain, the tda1∆ mutant exhibited an upregulation of the glucose repressed hexose transporter HXT6 during the log phase, and upregulation of mitochondrial proteins and genes related to mitochondrial translation during the PDS phase. Gene set enrichment analysis showed an enrichment in mitochondrial translation in the PDS phase for the deletion mutant tda1∆, but not for the reference strain. Transcription factor analysis showed that the enrichment of Mig1p repressed genes was not statistically significant in TDA1 deletion mutants for neither log-phase nor PDS-phase. This conflicted with the previously suggested model that argued for an interaction between Tda1p and Mig1p. Instead, transcription factor analysis showed an enrichment of genes regulated by the HAP-complex, which regulates mitochondrial translation, during the PDS-phase in the tda1∆ mutant. The combined evidence from this study indicates that Tda1p does not participate in Mig1p-mediated glucose repression. Instead, we propose that it is involved in the regulation of mitochondrial translation by repressing the expression of HAP complex subunits.","PeriodicalId":23870,"journal":{"name":"Yeast","volume":" ","pages":"142-156"},"PeriodicalIF":2.6,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12232523/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144498188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Rapid Growth Rate Underpins the Dominance of Hanseniaspora uvarum in Spontaneous Grape Juice Fermentations. 快速的生长速度支持了葡萄芽孢杆菌在葡萄汁自发发酵中的优势地位。

IF 2.6 4区生物学

Yeast Pub Date : 2025-06-01 Epub Date: 2025-03-21 DOI: 10.1002/yea.4000

Cristobal A Onetto, Jane McCarthy, Simon A Schmidt

{"title":"A Rapid Growth Rate Underpins the Dominance of Hanseniaspora uvarum in Spontaneous Grape Juice Fermentations.","authors":"Cristobal A Onetto, Jane McCarthy, Simon A Schmidt","doi":"10.1002/yea.4000","DOIUrl":"10.1002/yea.4000","url":null,"abstract":"Hanseniaspora uvarum is consistently observed as the dominant non-Saccharomyces species in spontaneous grape juice fermentations. However, the physiological mechanisms and physicochemical variables influencing the prevalence of H. uvarum over other non-Saccharomyces species remain unclear. We tested the factors contributing to H. uvarum dominance by inoculating a chemically diverse set of grape juices with a mock community whose composition was based on a previously published comprehensive microbial survey of commercial spontaneous fermentations. The diverse composition of these grape juices appeared to have minimal impact on the overall microbial dynamics of fermentation, with H. uvarum consistently emerging as the dominant non-Saccharomyces species in nearly all conditions tested. Flow cytometry analysis confirmed that H. uvarum has a faster growth rate than Saccharomyces cerevisiae and several other Hanseniaspora species. Moreover, its growth was not affected by the presence of S. cerevisiae. H. uvarum negatively affected the growth of S. cerevisiae, with significant implications for fermentation performance and sugar consumption. Our study suggests that the fast growth rate of H. uvarum enables it to dominate the grape juice environment quickly during early fermentation stages. This physiological advantage may be critical to the outcome of spontaneous fermentations, as evidenced by its direct impact on S. cerevisiae and fermentation performance.","PeriodicalId":23870,"journal":{"name":"Yeast","volume":" ","pages":"116-125"},"PeriodicalIF":2.6,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143674604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Saccharomycopsis yichangensis sp. nov., a Novel Predacious Yeast Species Isolated From Soil. 宜昌酵母菌（Saccharomycopsis ychangensis sp. nov.）——一种从土壤中分离的新型掠食性酵母。

IF 2.6 4区生物学

Yeast Pub Date : 2025-06-01 Epub Date: 2025-05-20 DOI: 10.1002/yea.4002

Shuang Hu, Liang-Chen Guo, Yan-Jie Qiu, Qi-Yang Zhu, Ri-Peng Zhang, Pei-Jie Han, Feng-Yan Bai

{"title":"Saccharomycopsis yichangensis sp. nov., a Novel Predacious Yeast Species Isolated From Soil.","authors":"Shuang Hu, Liang-Chen Guo, Yan-Jie Qiu, Qi-Yang Zhu, Ri-Peng Zhang, Pei-Jie Han, Feng-Yan Bai","doi":"10.1002/yea.4002","DOIUrl":"10.1002/yea.4002","url":null,"abstract":"Two yeast strains belonging to the ascomycetous yeast genus Saccharomycopsis were isolated from soil collected from a forest in Wufeng Tujia Autonomous County, Yichang, Hubei province, China. Phylogenetic analyzes of the internal transcribed spacer (ITS) region and the D1/D2 domain of the large subunit rRNA gene showed that they closely related to S. fermentans and S. babjevae but differed from S. fermentans by 17 (3.09%, 15 substitutions and two gaps) and 30 (4.85%, 22 substitutions and eight gaps) mismatches, and from S. babjevae by 13 (2.39%, eight substitutions and five gaps) and 21 (3.46%, 14 substitutions and seven gaps) mismatches in the D1/D2 domain and ITS region, respectively. A phylogenomic analysis based on 1260 single-copy orthologs confirmed the close relationship of the new Chinese strains with S. fermentans and S. babjevae. The whole genome average nucleotide identity (ANI) values of the new strains with the two species are 85.7% and 86.9%, respectively. The results suggest that the two strains represent a novel species, for which the name Saccharomycopsis yichangensis sp. nov. (holotype strain CGMCC 2.7390) is proposed. The Fungal Names number is FN 572295. The novel yeast is homothallic and produces asci containing four spheroidal ascospores with an equatorial or subequatorial ledge. This species can prey on cells of Jamesozyma jinghongensis, Meyerozyma carpophila and Saccharomyces cerevisiae through invasive infection pegs.","PeriodicalId":23870,"journal":{"name":"Yeast","volume":" ","pages":"132-141"},"PeriodicalIF":2.6,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144112219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0