{"title":"Matcha intake enhances systemic oxidative stress resistance and activates detoxification pathways in Drosophila melanogaster.","authors":"Manabu Tsuda","doi":"10.1093/bbb/zbaf145","DOIUrl":"https://doi.org/10.1093/bbb/zbaf145","url":null,"abstract":"<p><p>Matcha, a Japanese powdered green tea, enhances Drosophila resistance to oxidative stress. Transcriptome analysis shows activation of detoxification and antioxidant pathways, likely driven by caffeine-catechin synergy. Unlike green tea catechins, matcha did not extend lifespan under high-protein diets, underscoring complex physiological effects and validating Drosophila as a nutrigenomic model.</p>","PeriodicalId":9175,"journal":{"name":"Bioscience, Biotechnology, and Biochemistry","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145249801","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}
{"title":"Cation/H+ exchangers OsCHX11 and OsCHX16 facilitate potassium transport under saline and saline-alkaline conditions.","authors":"Mami Nampei, Daichi Toyama, Mitsuki Kondo, Nguyen Manh Linh, Akihiro Ueda","doi":"10.1093/bbb/zbaf142","DOIUrl":"https://doi.org/10.1093/bbb/zbaf142","url":null,"abstract":"<p><p>This study aimed to elucidate the functions of saline-alkaline inducible genes encoding OsCHX11 and OsCHX16, members of the cation/H+ exchanger (CHXs) family, under different component of saline-alkaline conditions. Rice biomass under carbonate-based (50 mM Na+ with carbonates) and high-pH (50 mM Na+ without carbonates) conditions was similar, whereas higher Na+/K+ ratio was observed under carbonate-based conditions. Under carbonate-based conditions, only OsCHX16 was significantly expressed, whereas both OsCHX11 and OsCHX16 were highly expressed under high pH conditions. The yeast complementation assay showed that OsCHX11 and OsCHX16 improved the yeast growth under saline, carbonate-based, and high-pH conditions by increasing K+ concentration. Taken together, these results suggest that OsCHX11 and OsCHX16 may contribute to the K+ uptake system under saline-alkaline conditions with or without carbonates at cell level.</p>","PeriodicalId":9175,"journal":{"name":"Bioscience, Biotechnology, and Biochemistry","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145231513","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}
{"title":"Elemental Selectivity and Homeostatic Crosstalk among Zinc, Copper, and Manganese in Vertebrate Cells.","authors":"Taiho Kambe, Akane Yamamoto, Kazutaka Nakakita","doi":"10.1093/bbb/zbaf143","DOIUrl":"https://doi.org/10.1093/bbb/zbaf143","url":null,"abstract":"<p><p>Zinc (Zn), Copper (Cu), and Manganese (Mn) are micronutrients that are essential for biological functions. They act as cofactors for numerous proteins and serve as signaling molecules. Although recent studies have significantly advanced our understanding of the individual roles of these metals, their homeostatic interactions remain largely unclear, except for a few well-documented cases, most notably the well-known competition between Zn and Cu for intestinal absorption. Moreover, recent research in vertebrates has suggested that Mn metabolism is closely linked to Zn metabolism in various cellular processes. Investigating the regulatory mechanisms governing homeostasis of essential trace metals is crucial for elucidating their functions in cellular systems. In this review, we provide a brief overview of the recent advances in understanding the competition between Cu, Mn, and Zn, with a particular focus on the interaction of Zn with the other two metals.</p>","PeriodicalId":9175,"journal":{"name":"Bioscience, Biotechnology, and Biochemistry","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145231485","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}
{"title":"Antimycin A, but not antimycin A3 or myxothiazol, directly suppresses photosystem II activity.","authors":"Ko Imaizumi, Kentaro Ifuku","doi":"10.1093/bbb/zbaf141","DOIUrl":"https://doi.org/10.1093/bbb/zbaf141","url":null,"abstract":"<p><p>Antimycin A (AA) is a widely used inhibitor to study photosynthesis and respiration. In photosynthesis, it is commonly used to inhibit a pathway of cyclic electron flow around photosystem I (CEF-PSI), but has also been reported to affect photosystem II (PSII), not involved in CEF-PSI. Although concerns have been raised about AA's specificity, its impact on PSII activity remains unclear. AA3 was recently proposed as a more specific inhibitor of the same CEF-PSI pathway. In the mitochondrial respiratory chain, AA inhibits complex III, like myxothiazol. Here, we investigated the direct effects of AA, AA3, and myxothiazol on PSII activity and linear photosynthetic electron transport using isolated plant PSII and thylakoid membranes. AA, but neither AA3 nor myxothiazol, directly suppressed PSII activity and linear electron transport. Furthermore, the extent of AA's effects was batch-dependent. Thus, we propose using AA3 to inhibit CEF-PSI and myxothiazol to inhibit complex III, instead of AA.</p>","PeriodicalId":9175,"journal":{"name":"Bioscience, Biotechnology, and Biochemistry","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145231493","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}
{"title":"Heterologous expression of carbonic anhydrase in Acinetobacter sp. Tol 5 for whole-cell biocatalysis.","authors":"Shogo Yoshimoto, Hiroya Oka, Yuki Ohara, Yan-Yu Chen, Masahito Ishikawa, Katsutoshi Hori","doi":"10.1093/bbb/zbaf137","DOIUrl":"https://doi.org/10.1093/bbb/zbaf137","url":null,"abstract":"<p><p>Carbonic anhydrase accelerates the hydration of carbon dioxide (CO₂) and is an attractive biocatalyst for carbon capture and utilization. Acinetobacter sp. Tol 5 shows high adhesiveness via its cell-surface protein AtaA. We previously demonstrated its application to bacterial immobilization and gas-phase bioproduction. Here, we developed Tol 5 cells expressing carbonic anhydrase and evaluated CO₂ conversion ability as whole-cell biocatalysts. A codon-optimized carbonic anhydrase from Sulfurihydrogenibium yellowstonense (SyCA) was produced in the cytoplasm, but the cells showed little activity as a whole-cell biocatalyst. To enhance activity, we fused six signal peptides (SPs) to SyCA for periplasmic expression. The Omp38-SP fusion of SyCA was properly processed to the mature size, yielding higher whole-cell activity. By contrast, the other constructs were either undetectable or remained unprocessed, resulting in lower activities. These results show that periplasmic expression of SyCA is important for efficient CO₂ hydration in Tol 5 cells as whole-cell biocatalysts.</p>","PeriodicalId":9175,"journal":{"name":"Bioscience, Biotechnology, and Biochemistry","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145184532","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}
W E N Jing, N I Shuai-Cong, M A-H A I Xiao-Lin-Mo, L I U Yuan, Y A N Xin-Jia
{"title":"Proteomic profiling reveals selaginellin A-induced blockade of cell cycle in MDA-MB-231 cells.","authors":"W E N Jing, N I Shuai-Cong, M A-H A I Xiao-Lin-Mo, L I U Yuan, Y A N Xin-Jia","doi":"10.1093/bbb/zbaf139","DOIUrl":"https://doi.org/10.1093/bbb/zbaf139","url":null,"abstract":"<p><p>Selaginellin A (Sela A), a derivative from Selaginella tamariscina, exerts anti-triple-negative breast cancer effects in MDA-MB-231 cells. Proteomic profiling identified 1 136 differentially expressed proteins (DEPs) after Sela A treatment, predominantly downregulated (n = 889). Enrichment analyses revealed Sela A significantly downregulated pathways critical for DNA repair, replication, and cell cycle progression, while upregulating ribosomal biogenesis and protein processing. Mechanistically, Sela A acts as a PTP1B inhibitor (IC50 = 7.4 μM), binding key residues (PHE-182, GLU-186). This inhibition activates the mechanistic target of rapamycin complex 1 (mTOR). Consequently, mTOR activation stimulates ribosomal synthesis but concurrently triggers a p70S6K-mediated negative feedback loop, degrading IRS1. IRS1 loss suppresses Akt signaling, reducing expression of cell cycle proteins and inducing G1-phase arrest. Thus, Sela A may block MDA-MB-231 cell proliferation via PTP1B inhibition driving mTOR/IRS1/Akt dysregulation.</p>","PeriodicalId":9175,"journal":{"name":"Bioscience, Biotechnology, and Biochemistry","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145184543","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}
Anna Ochi, Kazuaki Takahashi, Mai Tanaka, Ryo Muramoto, Rino Yasuhara, Roudatul Ibdiah, Masao Inoue, Riku Aono, Hisaaki Mihara
{"title":"Production of dimethyldiselenide from methaneseleninic acid by soil bacteria.","authors":"Anna Ochi, Kazuaki Takahashi, Mai Tanaka, Ryo Muramoto, Rino Yasuhara, Roudatul Ibdiah, Masao Inoue, Riku Aono, Hisaaki Mihara","doi":"10.1093/bbb/zbaf140","DOIUrl":"https://doi.org/10.1093/bbb/zbaf140","url":null,"abstract":"<p><p>We isolated 23 soil bacterial strains tolerating methaneseleninic acid (MSeA), an oxidized organoselenium metabolite. Among them, Pseudomonas sp. M10 exhibited the highest MSeA tolerance and converted MSeA into volatile dimethyldiselenide, consistent with a redox-driven, non-enzymatic process. This is the first report of bacterially mediated MSeA volatilization, revealing a previously unrecognized microbial contribution to selenium flux between terrestrial and atmospheric compartments.</p>","PeriodicalId":9175,"journal":{"name":"Bioscience, Biotechnology, and Biochemistry","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145184617","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}
{"title":"Proteinaceous components in goat amniotic fluid enhance the expression of keratinocyte differentiation-related proteins.","authors":"Tokuji Tsuji, Mao Ohashi, Rikuto Imai, Yusuke Kawaguchi, Hisateru Yamaguchi, Shuichi Matsuyama, Sho Nakamura, Satoshi Ohkura, Kiyotaka Hitomi","doi":"10.1093/bbb/zbaf138","DOIUrl":"https://doi.org/10.1093/bbb/zbaf138","url":null,"abstract":"<p><p>Amniotic fluid (AF) constitutes a dynamic environment containing diverse bioactive molecules derived from both maternal and fetal sources that support fetal development. As the fetus develops in continuous contact with AF, it is plausible that AF influences the formation of the skin epidermis. However, the mechanisms through which AF promotes keratinocyte differentiation remain largely unclear. Here, we showed that goat AF enhanced the expression of key functional proteins involved in epidermal barrier formation, including small proline-rich proteins, loricrin, and transglutaminase. We further obtained the bioactive fractions that promote the expression of these differentiation-related proteins through multistep protein fractionation via column chromatography. Proteomic analysis subsequently revealed 291 candidate proteins, including 85 distinct extracellular proteins, primarily grouped into calcium-binding proteins, proteases and their regulators, extracellular matrix components, and signaling molecules. Collectively, these results suggest that proteins secreted or released into AF contribute to establishing a microenvironment conducive to epidermal differentiation.</p>","PeriodicalId":9175,"journal":{"name":"Bioscience, Biotechnology, and Biochemistry","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145136532","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}
{"title":"Shaping apple tree architecture: 1,3,4-oxathiazol-2-one derivatives as inhibitors of MdDOX-Co activity.","authors":"Yuta Kitajima, Taiki Inoue, Kojiro Kawada, Tatsuo Saito, Ikuo Takahashi, Kohji Murase, Tadao Asami, Masatoshi Nakajima","doi":"10.1093/bbb/zbaf103","DOIUrl":"10.1093/bbb/zbaf103","url":null,"abstract":"<p><p>Labor shortages threaten global apple production, thereby encouraging new strategies to improve orchard management. The growth of columnar apples, controlled by the MdDOX-Co gene, enables vertical growth with minimal lateral branching, allowing for high-density planting and easier harvesting. MdDOX-Co encodes 2-oxoglutarate-dependent dioxygenase (2ODD, DOX). This study aimed to identify selective chemical inhibitors of MdDOX-Co. We synthesized the parental C6-based analogs featuring a heterocyclic 1,3,4-oxathiazol-2-one ring and evaluated their inhibitory activity. Compounds retaining the 1,3,4-oxathiazol-2-one core exhibited strong in vitro inhibition and promoted seedling elongation in MdDOX-Co overexpressing Arabidopsis. Structure-activity analysis confirmed that the 1,3,4-oxathiazol-2-one ring was essential, with tolerance for side-chain variations, including bulky groups. Selectivity assays indicated minimal off-target effects on the related 2ODD enzymes. Molecular modeling suggested the compatibility of the lead compounds with the MdDOX-Co active site. These findings encourage us to develop MdDOX-Co-targeted agrochemicals to chemically regulate tree architecture and enhance productivity during apple cultivation.</p>","PeriodicalId":9175,"journal":{"name":"Bioscience, Biotechnology, and Biochemistry","volume":" ","pages":"1456-1463"},"PeriodicalIF":1.3,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144648595","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}
{"title":"Functional characterization of an additional transmembrane domain unique to TrkG and TrkH in Escherichia coli.","authors":"Ellen Tanudjaja, Haoyu Zhang, Tadaomi Furuta, Masaru Tsujii, Yasuhiro Ishimaru, Nobuyuki Uozumi","doi":"10.1093/bbb/zbaf101","DOIUrl":"10.1093/bbb/zbaf101","url":null,"abstract":"<p><p>Escherichia coli TrkG and TrkH transporters contain a unique N-terminal Domain-0 (D0). Our findings reveal that D0 supports both the function and stability of TrkG, enabling K+ and Na+ uptake, whereas it is not essential for TrkH-mediated K+ uptake. This difference can be attributed to D0 role in stabilizing polar residues within TrkG core transmembrane domains.</p>","PeriodicalId":9175,"journal":{"name":"Bioscience, Biotechnology, and Biochemistry","volume":" ","pages":"1474-1478"},"PeriodicalIF":1.3,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144636219","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}