Article
Oceanography
Juan Yu, Su Wang, Jing-Guang Lai, Ji-Yuan Tian, Hao-Quan Zhang, Gui-Peng Yang, Rong Chen
Summary: This study investigated the spatial distributions of DMS, DMSP, DLA, and the abundances of bacteria, DMSP-consuming bacteria, and dimethyl sulfoxide-consuming bacteria in the surface seawater of the Bohai Sea and Yellow Sea during autumn 2020. The results showed that the distributions of DMS and dissolved DMSP were significantly correlated with DLA. Grazing by microzooplankton promoted the conversion of DMSP to DMS, and mesozooplankton copepod grazing stimulated DMS production.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Biotechnology & Applied Microbiology
Pei-Feng Li, Pei-Pei Gao, Chun-Ying Liu, Hong-Hai Zhang, Gui-Peng Yang
Summary: Dimethyl sulfide (DMS) is an important trace gas transferred from the ocean to the atmosphere, produced by marine algae through the enzymatic cleavage of dimethylsulfoniopropionate (DMSP) yielding DMS and acrylic acid (AA). The production kinetics of DMS and AA from dissolved DMSP (DMSPd) in Prorocentrum minimum cultures varied during different growth stages, with DMS production following Michaelis-Menten kinetics and AA production showing a nearly linear fit. The ratios of DMS/AA and DMS/(DMSP + AA) were low, indicating a non-DMS-production pathway for DMSP degradation.
JOURNAL OF APPLIED PHYCOLOGY
(2022)
Article
Oceanography
Feng Xu, Hong-Hai Zhang, Teng Jia, Shi-Bo Yan, Jin-Wei Wu, Chun-Ying Liu, Gui-Peng Yang
Summary: Continuous input from the Changjiang River significantly reshuffled the ecosystems in the Changjiang Estuary and adjacent East China Sea, impacting the production, distribution, and emission of marine dimethyl sulfide (DMS). The effect of phytoplankton biomass and composition on DMS under different nutrient inputs remains poorly understood. Our findings indicate that changes in nutrient inputs will promote DMS emissions from the Changjiang Estuary.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Environmental Sciences
Robin Benard, Martine Lizotte, Maurice Levasseur, Michael Scarratt, Sonia Michaud, Michel Starr, Jean-Eric Tremblay, Ronald P. Kiene, Sohiko Kameyama
Summary: Experimental study on the impact of anthropogenic pH perturbation (ApHP) on DMS and DMSP concentrations revealed a reduction in microbial DMS yield, while microbial scavenging efficiency of dissolved DMSP remained unaffected. These findings suggest a potential link between ApHP and alterations in the microbial breakdown of DMSP, which could have implications for Earth's future climate.
ELEMENTA-SCIENCE OF THE ANTHROPOCENE
(2021)
Article
Chemistry, Analytical
Jin-Wei Wu, Feng Xu, Long Liu, Mei-Hui Ren, Hong-Hai Zhang, Gui-Peng Yang
Summary: The study investigated the concentrations of DMS and DMSP in the East China Sea during summer and their contribution to atmospheric non-sea-salt sulfate. The results show that marine DMS release is an important factor in the East China Sea during summer and cannot be neglected.
ENVIRONMENTAL CHEMISTRY
(2021)
Article
Environmental Sciences
Kitack Lee, Jun-Seok Kim, Ki-Tae Park, Min-Ji Park, Eunho Jang, Kristinn Gudmundsson, Solveig R. Olafsdottir, Jon Olafsson, Young Jun Yoon, Bang -Yong Lee, Sae Yun Kwon, Jonghun Kam
Summary: In two spring blooms in the Icelandic Sea, the concentrations of chlorophyll-a and DMSP, as well as the DMSP lyase activity, were measured. The distribution of ocean parameters related to biology showed associations, but the statistical significance of the association varied between different ocean domains and years. The dominance of DMSP-rich phytoplankton indicated that variations in these organisms were likely a main factor influencing the statistical significance. The study also demonstrated the consistency between DMS production capacity and in situ ocean S data.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Oceanography
Yan Zhang, Dan-Dan Tan, Zhen He, Juan Yu, Gui-Peng Yang
Summary: This study conducted a comprehensive investigation on biogenic dimethylated sulfur compounds and methane (CH4) in the Yellow Sea and Bohai Sea during spring and summer in 2018. The findings showed that the concentrations of dimethylsulfide (DMS), dimethylsulfoniopropionate (DMSP), dimethylsulfoxide (DMSO), and CH4 were higher in summer and coastal waters, influenced by phytoplankton biomass and terrestrial sources. The flux distributions of DMS and CH4 were consistent with their concentration distributions. Microbial consumption was identified as the primary mechanism for DMS removal. The paper is rated 8.5 for its importance.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Multidisciplinary Sciences
Hackwon Do, Dieu Linh Nguyen, Chang Woo Lee, Min Ju Lee, Hoejung Oh, Jisub Hwang, Se Jong Han, Sung Gu Lee, Jun Hyuck Lee
Summary: This study investigated the structure and function of two OTCs from Psychrobacter sp. PAMC 21119. Comparison of the structures revealed that the 80s loop of one OTC influenced cooperativity, while the corresponding loop of the other OTC did not. In addition, thermal stability experiments showed that each OTC preferred substrates for unidirectional processes.
Article
Limnology
Brandon J. J. McNabb, Philippe D. D. Tortell
Summary: We developed two machine learning models to accurately map the Southern Ocean distribution of dimethyl sulfide (DMS), a climate-active gas. The models outperformed traditional statistical techniques and existing climatologies, providing more accurate and unbiased predictions. The models revealed that wind-driven mixing is the main control on DMS distributions, and identified factors like mixed layer depth and sea-ice cover as important drivers of DMS seasonality. Additionally, our work estimated the Southern Ocean sea-air DMS flux and highlighted the region's significance in the marine sulfur cycle.
LIMNOLOGY AND OCEANOGRAPHY
(2023)
Article
Biology
Kylie Owen, Kentaro Saeki, Joseph D. Warren, Alessandro Bocconcelli, David N. Wiley, Shin-Ichi Ohira, Annette Bombosch, Kei Toda, Daniel P. Zitterbart
Summary: Finding prey is essential to marine predators' survival, and natural DMS concentrations are spatially correlated to zooplankton biomass. Agent simulations demonstrate that tracking fine-scale gradients of DMS leads zooplankton predators to areas with higher prey biomass efficiently.
COMMUNICATIONS BIOLOGY
(2021)
Article
Environmental Sciences
Wenwen Li, Zhangliang Han, Dezhi Sun
Summary: This study utilized cheap sludge to prepare adsorbents for eliminating DMS and DMDS, with SACs prepared by KOH activation showing high adsorption capacity. The developed SAC adsorbents showed efficient adsorption for DMS and DMDS, and could be regenerated for multiple cycles.
Article
Microbiology
Jasvinder Kaur, Utkarsh Sood, Chandni Talwar, William B. Whitman, Rup Lal
Summary: The taxonomic status of 43 Psychrobacter species was examined based on genome sequences. Three groups of strains were found to be conspecific, and their classification was proposed based on similarities in nucleotide identity, DNA hybridization, morphology, growth properties, and fatty acid compositions.
ANTONIE VAN LEEUWENHOEK INTERNATIONAL JOURNAL OF GENERAL AND MOLECULAR MICROBIOLOGY
(2023)
Article
Environmental Sciences
Delaney B. Kilgour, Gordon A. Novak, Jon S. Sauer, Alexia N. Moore, Julie Dinasquet, Sarah Amiri, Emily B. Franklin, Kathryn Mayer, Margaux Winter, Clare K. Morris, Tyler Price, Francesca Malfatti, Daniel R. Crocker, Christopher Lee, Christopher D. Cappa, Allen H. Goldstein, Kimberly A. Prather, Timothy H. Bertram
Summary: The oxidation of dimethyl sulfide (DMS) emitted from the surface ocean contributes to cloud formation. This study investigates whether other sulfur-containing gases from marine sources also contribute to aerosol formation. The results show that DMS, methanethiol, and benzothiazole account for the majority of sulfur emissions, with non-DMS sulfur sources playing a significant role in the pre-bloom phase. The ratio of DMS to methanethiol emissions is influenced by bacterial sulfur demand and the availability of sulfur sources in seawater.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Analytical
Jamila B. Santiago, Fortunato B. Sevilla
Summary: A simple and low-cost method using digital imaging colorimetry based on a smartphone was developed for the measurement of dimethyl sulfide (DMS) in wastewater. The method proved effective in measuring DMS concentration through digital image analysis and color values, showing good correlation with traditional detection methods.
MICROCHEMICAL JOURNAL
(2022)
Article
Microbiology
Issac Abraham Sybiya Vasantha Packiavathy, Arunachalam Kannappan, Sivaprakasam Thiyagarajan, Ramanathan Srinivasan, Danaraj Jeyapragash, John Bosco John Paul, Pazhanivel Velmurugan, Arumugam Veera Ravi
Summary: Quorum sensing is a communication mechanism used by bacteria through small self-produced chemicals to regulate virulence factors' production and biofilm formation. The study identifies a marine bacterium, Psychrobacter sp., with potent quorum quenching activity against bacterial pathogenesis. This bacterium shows promise in controlling biofilm formation and virulence factors, leading to potential applications in combating multidrug resistant bacterial infections.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Biotechnology & Applied Microbiology
Gregory D. Rix, Jonathan D. Todd, Andrew L. Neal, Charles A. Brearley
Summary: HPLC methods are effective for predicting phytase activity, simplifying candidate selection, and revealing diversity of phytases. Combining with 16S sequencing and bioinformatics can uncover the contribution of MINPP activity to soil phytase activity.
MICROBIAL BIOTECHNOLOGY
(2021)
Article
Biology
Chun-Yang Li, Xiu-Juan Wang, Xiu-Lan Chen, Qi Sheng, Shan Zhang, Peng Wang, Mussa Quareshy, Branko Rihtman, Xuan Shao, Chao Gao, Fuchuan Li, Shengying Li, Weipeng Zhang, Xiao-Hua Zhang, Gui-Peng Yang, Jonathan D. Todd, Yin Chen, Yu-Zhong Zhang
Summary: DMSP is an important organosulfur molecule in marine environments, and DddX is a novel ATP-dependent DMSP lyase with a distinct catalytic mechanism, potentially playing a significant role in DMSP/DMS cycles.
Article
Microbiology
Laura Alvarez-Fraga, Minh-Duy Phan, Kelvin G. K. Goh, Nguyen Thi Khanh Nhu, Steven J. Hancock, Luke P. Allsopp, Kate M. Peters, Brian M. Forde, Leah W. Roberts, Matthew J. Sullivan, Makrina Totsika, Scott A. Beatson, Glen C. Ulett, Mark A. Schembri
Summary: Many antibiotic resistant uropathogenic Escherichia coli (UPEC) strains belong to clones defined by their multilocus sequence type (ST), with ST131 being the most dominant. Although we have a good understanding of resistance development to fluoroquinolones and third-generation cephalosporins by ST131, our understanding of the virulence repertoire that has contributed to its global dissemination is limited. Afa/Dr fimbriae genes are found frequently in ST131 strains, and the integration of insertion sequence (IS) elements in the afa regulatory region leads to altered virulence capacity.
Article
Immunology
Matthew J. Sullivan, Kelvin G. K. Goh, Ruby Thapa, Debasish Chattopadhyay, Deepak S. Ipe, Benjamin L. Duell, Lahiru Katupitiya, Dean Gosling, Dhruba Acharya, Glen C. Ulett
Summary: This study suggests that Streptococcus agalactiae GAPDH affects phagocytosis outcomes and cytokine production, and influences bacterial survival in the female reproductive tract.
Article
Microbiology
Kelvin G. K. Goh, Matthew J. Sullivan, Glen C. Ulett
Summary: This study discovered that, in addition to the classical cop operon, GBS utilizes other genes to resist copper stress and maintain copper homeostasis within the cells. These genes include enzymes, cell wall synthesis factors, transporters, and cell signaling factors among others.
JOURNAL OF BACTERIOLOGY
(2022)
Article
Multidisciplinary Sciences
Ming Peng, Chun-Yang Li, Xiu-Lan Chen, Beth T. Williams, Kang Li, Ya-Nan Gao, Peng Wang, Ning Wang, Chao Gao, Shan Zhang, Marie C. Schoelmerich, Jillian F. Banfield, J. Benjamin Miller, Nick E. Le Brun, Jonathan D. Todd, Yu-Zhong Zhang
Summary: This study characterizes the structure and mechanism of the DMSP synthesis enzyme MmtN and identifies functional MmtN enzymes in various organisms. The study provides important insights into SMM and/or DMSP production and proposes additional roles for these compounds.
NATURE COMMUNICATIONS
(2022)
Article
Immunology
Anu Chacko, Ali Delbaz, Indra N. Choudhury, Tanja Eindorf, Megha Shah, Christopher Godfrey, Mathew J. Sullivan, James A. St John, Glen C. Ulett, Jenny A. K. Ekberg
Summary: Streptococcus agalactiae can invade the central nervous system via the nose-to-brain path, with increased load after epithelial injury. The bacteria can survive in glia and induce cytokine production, with the capsule affecting cellular responses and survival.
FRONTIERS IN CELLULAR AND INFECTION MICROBIOLOGY
(2022)
Article
Environmental Sciences
Felicity W. I. Kuek, Cherie A. Motti, Jia Zhang, Ira R. Cooke, Jonathan D. Todd, David J. Miller, David G. Bourne, Jean-Baptiste Raina
Summary: This study reveals that bacteria associated with corals can synthesize DMSP and may contribute to DMSP production by corals.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Microbiology
Matthew J. Sullivan, Kelvin G. K. Goh, Glen C. Ulett
Summary: This study reveals a new and important mechanism of cross-system complexity driven by CopY in GBS to regulate cellular management of metal stress and survival.
Article
Microbiology
Jingli Liu, Chun-Xu Xue, Jinyan Wang, Andrew T. Crombie, Ornella Carrion, Andrew W. B. Johnston, J. Colin Murrell, Ji Liu, Yanfen Zheng, Xiao-Hua Zhang, Jonathan D. Todd
Summary: This study used a novel DNA-SIP approach to identify key microorganisms actively utilizing DMSP and DMS as carbon sources in marine environments. The findings highlight the diversity in microbial utilization of DMSP and the complexity of pathways involved, emphasizing the importance of microbial identification in marine environments.
Article
Multidisciplinary Sciences
Gregory D. Rix, Colleen Sprigg, Hayley Whitfield, Andrew M. Hemmings, Jonathan D. Todd, Charles A. Brearley
Summary: Phylogenetic analysis, homology modelling, and biochemical methods were used to study a phytase from a Gram-negative soil bacterium. The enzyme showed stability in solution, broad pH activity profile, and specific substrate binding pockets. The transcription of the phytase gene was affected by environmental conditions.
Article
Ecology
Chun-Yang Li, Michaela A. Mausz, Andrew Murphy, Nan Zhang, Xiu-Lan Chen, Shu-Yan Wang, Chao Gao, Maria M. Aguilo-Ferretjans, Eleonora Silvano, Ian D. E. A. Lidbury, Hui-Hui Fu, Jonathan D. Todd, Yin Chen, Yu-Zhong Zhang
Summary: Through genomics analyses and biochemical analyses, a DMSP-specific transporter, DmpXWV, was identified in the marine bacteria Ruegeria pomeroyi DSS-3. The substrate binding protein of DmpXWV, DmpX, showed high specificity and affinity towards DMSP. DmpX proteins are prevalent in cosmopolitan marine bacteria, and dmpX transcription is consistently high in the global ocean. This study provides new insights into DMSP transport and the environmental adaptation of marine bacteria.
Article
Ecology
Rachel Stirrup, Michaela A. Mausz, Eleonora Silvano, Andrew Murphy, Richard Guillonneau, Mussa Quareshy, Branko Rihtman, Maria Aguilo Ferretjans, Ruo He, Jonathan D. Todd, Feng Chen, David J. Scanlan, Yin Chen
Summary: Lipids play a crucial role in maintaining cell integrity and homeostasis. The cosmopolitan marine roseobacter clade (MRC) and SAR11 clade bacteria produce a variety of amino acid-containing lipids. The study reveals that these lipids are present in both the inner and outer membranes of MRC bacteria. The inability to produce these lipids impacts membrane proteome, nutrient transport, competitiveness, and phage attachment.
Article
Ecology
Chun-Yang Li, Hai-Yan Cao, Qing Wang, Ornella Carrion, Xiaoyu Zhu, Jie Miao, Peng Wang, Xiu-Lan Chen, Jonathan D. D. Todd, Yu-Zhong Zhang
Summary: DMS is a major biosulfur source in the atmosphere and plays a crucial role in global sulfur cycling and potential climate regulation. It is now discovered that the MddA enzyme can methylate inorganic H2S to DMS, expanding its significance in various environments. This finding suggests that the importance of MddA-driven methylation of inorganic H2S to global DMS production and sulfur cycling has been considerably underestimated.
Article
Microbiology
Laura Alvarez-Fraga, Minh-Duy Phan, Kelvin G. K. Goh, Nguyen Thi Khanh Nhu, Steven J. Hancock, Luke P. Allsopp, Kate M. Peters, Brian M. Forde, Leah W. Roberts, Matthew J. Sullivan, Makrina Totsika, Scott A. Beatson, Glen C. Ulett, Mark A. Schembri
Summary: This study identified the widespread presence of genes encoding Afa/Dr fimbriae in UPEC ST131 strains, and demonstrated how the integration of IS elements in the afa regulatory region affects Afa expression, altering its virulence. Evidence suggests that IS1 elements have a more widespread impact on ST131 genome evolution.
