1
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Otte A, Winder JC, Deng L, Schmutz J, Jenkins J, Grigoriev IV, Hopes A, Mock T. The diatom Fragilariopsis cylindrus: A model alga to understand cold-adapted life. JOURNAL OF PHYCOLOGY 2023; 59:301-306. [PMID: 36856453 DOI: 10.1111/jpy.13325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 02/24/2023] [Accepted: 02/24/2023] [Indexed: 05/28/2023]
Abstract
Diatoms are significant primary producers especially in cold, turbulent, and nutrient-rich surface oceans. Hence, they are abundant in polar oceans, but also underpin most of the polar food webs and related biogeochemical cycles. The cold-adapted pennate diatom Fragilariopsis cylindrus is considered a keystone species in polar oceans and sea ice because it can thrive under different environmental conditions if temperatures are low. In this perspective paper, we provide insights into the latest molecular work that has been done on F. cylindrus and discuss its role as a model alga to understand cold-adapted life.
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Affiliation(s)
- Antonia Otte
- School of Environmental Sciences, University of East Anglia, Norwich, UK
| | - Johanna C Winder
- School of Environmental Sciences, University of East Anglia, Norwich, UK
| | - Longji Deng
- School of Environmental Sciences, University of East Anglia, Norwich, UK
| | - Jeremy Schmutz
- HudsonAlpha Institute for Biotechnology, Huntsville, Alabama, USA
- DOE Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Jerry Jenkins
- HudsonAlpha Institute for Biotechnology, Huntsville, Alabama, USA
| | - Igor V Grigoriev
- DOE Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Amanda Hopes
- School of Environmental Sciences, University of East Anglia, Norwich, UK
| | - Thomas Mock
- School of Environmental Sciences, University of East Anglia, Norwich, UK
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2
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Dorrell RG, Kuo A, Füssy Z, Richardson EH, Salamov A, Zarevski N, Freyria NJ, Ibarbalz FM, Jenkins J, Pierella Karlusich JJ, Stecca Steindorff A, Edgar RE, Handley L, Lail K, Lipzen A, Lombard V, McFarlane J, Nef C, Novák Vanclová AM, Peng Y, Plott C, Potvin M, Vieira FRJ, Barry K, de Vargas C, Henrissat B, Pelletier E, Schmutz J, Wincker P, Dacks JB, Bowler C, Grigoriev IV, Lovejoy C. Convergent evolution and horizontal gene transfer in Arctic Ocean microalgae. Life Sci Alliance 2023; 6:6/3/e202201833. [PMID: 36522135 PMCID: PMC9756366 DOI: 10.26508/lsa.202201833] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 11/29/2022] [Accepted: 12/01/2022] [Indexed: 12/23/2022] Open
Abstract
Microbial communities in the world ocean are affected strongly by oceanic circulation, creating characteristic marine biomes. The high connectivity of most of the ocean makes it difficult to disentangle selective retention of colonizing genotypes (with traits suited to biome specific conditions) from evolutionary selection, which would act on founder genotypes over time. The Arctic Ocean is exceptional with limited exchange with other oceans and ice covered since the last ice age. To test whether Arctic microalgal lineages evolved apart from algae in the global ocean, we sequenced four lineages of microalgae isolated from Arctic waters and sea ice. Here we show convergent evolution and highlight geographically limited HGT as an ecological adaptive force in the form of PFAM complements and horizontal acquisition of key adaptive genes. Notably, ice-binding proteins were acquired and horizontally transferred among Arctic strains. A comparison with Tara Oceans metagenomes and metatranscriptomes confirmed mostly Arctic distributions of these IBPs. The phylogeny of Arctic-specific genes indicated that these events were independent of bacterial-sourced HGTs in Antarctic Southern Ocean microalgae.
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Affiliation(s)
- Richard G Dorrell
- Institut de Biologie de l'ENS, Département de Biologie, École Normale Supérieure, CNRS, INSERM, Université PSL, Paris, France.,CNRS Research Federation for the Study of Global Ocean Systems Ecology and Evolution, FR2022/Tara Oceans GOSEE, Paris, France
| | - Alan Kuo
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Zoltan Füssy
- Department of Parasitology, BIOCEV, Faculty of Science, Charles University, Prague, Czech Republic
| | - Elisabeth H Richardson
- Division of Infectious Diseases, Department of Medicine, University of Alberta and Department of Biological Sciences, and University of Alberta, Edmonton, Canada
| | - Asaf Salamov
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Nikola Zarevski
- Institut de Biologie de l'ENS, Département de Biologie, École Normale Supérieure, CNRS, INSERM, Université PSL, Paris, France.,CNRS Research Federation for the Study of Global Ocean Systems Ecology and Evolution, FR2022/Tara Oceans GOSEE, Paris, France
| | - Nastasia J Freyria
- Département de Biologie, Institut de Biologie Intégrative des Systèmes, Université Laval, Quebec, Canada
| | - Federico M Ibarbalz
- Institut de Biologie de l'ENS, Département de Biologie, École Normale Supérieure, CNRS, INSERM, Université PSL, Paris, France.,CNRS Research Federation for the Study of Global Ocean Systems Ecology and Evolution, FR2022/Tara Oceans GOSEE, Paris, France
| | - Jerry Jenkins
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.,HudsonAlpha Institute for Biotechnology, Huntsville, AL, USA
| | - Juan Jose Pierella Karlusich
- Institut de Biologie de l'ENS, Département de Biologie, École Normale Supérieure, CNRS, INSERM, Université PSL, Paris, France.,CNRS Research Federation for the Study of Global Ocean Systems Ecology and Evolution, FR2022/Tara Oceans GOSEE, Paris, France
| | - Andrei Stecca Steindorff
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Robyn E Edgar
- Département de Biologie, Institut de Biologie Intégrative des Systèmes, Université Laval, Quebec, Canada
| | - Lori Handley
- HudsonAlpha Institute for Biotechnology, Huntsville, AL, USA
| | - Kathleen Lail
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Anna Lipzen
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Vincent Lombard
- Department of Biological Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - John McFarlane
- Division of Infectious Diseases, Department of Medicine, University of Alberta and Department of Biological Sciences, and University of Alberta, Edmonton, Canada
| | - Charlotte Nef
- Institut de Biologie de l'ENS, Département de Biologie, École Normale Supérieure, CNRS, INSERM, Université PSL, Paris, France.,CNRS Research Federation for the Study of Global Ocean Systems Ecology and Evolution, FR2022/Tara Oceans GOSEE, Paris, France
| | - Anna Mg Novák Vanclová
- Institut de Biologie de l'ENS, Département de Biologie, École Normale Supérieure, CNRS, INSERM, Université PSL, Paris, France.,CNRS Research Federation for the Study of Global Ocean Systems Ecology and Evolution, FR2022/Tara Oceans GOSEE, Paris, France
| | - Yi Peng
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Chris Plott
- HudsonAlpha Institute for Biotechnology, Huntsville, AL, USA
| | - Marianne Potvin
- Département de Biologie, Institut de Biologie Intégrative des Systèmes, Université Laval, Quebec, Canada
| | - Fabio Rocha Jimenez Vieira
- Institut de Biologie de l'ENS, Département de Biologie, École Normale Supérieure, CNRS, INSERM, Université PSL, Paris, France.,CNRS Research Federation for the Study of Global Ocean Systems Ecology and Evolution, FR2022/Tara Oceans GOSEE, Paris, France
| | - Kerrie Barry
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Colomban de Vargas
- CNRS Research Federation for the Study of Global Ocean Systems Ecology and Evolution, FR2022/Tara Oceans GOSEE, Paris, France.,Sorbonne Université, CNRS, Station Biologique de Roscoff, AD2M, UMR 7144, Roscoff, France
| | - Bernard Henrissat
- Architecture et Fonction des Macromolécules Biologiques, CNRS, Aix-Marseille Université, Marseille, France.,Department of Biological Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Eric Pelletier
- CNRS Research Federation for the Study of Global Ocean Systems Ecology and Evolution, FR2022/Tara Oceans GOSEE, Paris, France.,Génomique Métabolique, Genoscope, Institut de Biologie François Jacob, Commissariat à l'Énergie Atomique, CNRS, Université Évry, Université Paris-Saclay, Évry, France
| | - Jeremy Schmutz
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.,HudsonAlpha Institute for Biotechnology, Huntsville, AL, USA
| | - Patrick Wincker
- CNRS Research Federation for the Study of Global Ocean Systems Ecology and Evolution, FR2022/Tara Oceans GOSEE, Paris, France.,Génomique Métabolique, Genoscope, Institut de Biologie François Jacob, Commissariat à l'Énergie Atomique, CNRS, Université Évry, Université Paris-Saclay, Évry, France
| | - Joel B Dacks
- Division of Infectious Diseases, Department of Medicine, University of Alberta and Department of Biological Sciences, and University of Alberta, Edmonton, Canada
| | - Chris Bowler
- Institut de Biologie de l'ENS, Département de Biologie, École Normale Supérieure, CNRS, INSERM, Université PSL, Paris, France.,CNRS Research Federation for the Study of Global Ocean Systems Ecology and Evolution, FR2022/Tara Oceans GOSEE, Paris, France
| | - Igor V Grigoriev
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.,Department of Plant and Microbial Biology, University of California Berkeley, Berkeley, CA, USA
| | - Connie Lovejoy
- Département de Biologie, Institut de Biologie Intégrative des Systèmes, Université Laval, Quebec, Canada
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3
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Genetic and Structural Diversity of Prokaryotic Ice-Binding Proteins from the Central Arctic Ocean. Genes (Basel) 2023; 14:genes14020363. [PMID: 36833289 PMCID: PMC9957290 DOI: 10.3390/genes14020363] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 01/24/2023] [Accepted: 01/25/2023] [Indexed: 02/01/2023] Open
Abstract
Ice-binding proteins (IBPs) are a group of ecologically and biotechnologically relevant enzymes produced by psychrophilic organisms. Although putative IBPs containing the domain of unknown function (DUF) 3494 have been identified in many taxa of polar microbes, our knowledge of their genetic and structural diversity in natural microbial communities is limited. Here, we used samples from sea ice and sea water collected in the central Arctic Ocean as part of the MOSAiC expedition for metagenome sequencing and the subsequent analyses of metagenome-assembled genomes (MAGs). By linking structurally diverse IBPs to particular environments and potential functions, we reveal that IBP sequences are enriched in interior ice, have diverse genomic contexts and cluster taxonomically. Their diverse protein structures may be a consequence of domain shuffling, leading to variable combinations of protein domains in IBPs and probably reflecting the functional versatility required to thrive in the extreme and variable environment of the central Arctic Ocean.
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4
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Box ICH, Matthews BJ, Marshall KE. Molecular evidence of intertidal habitats selecting for repeated ice-binding protein evolution in invertebrates. J Exp Biol 2022; 225:274373. [PMID: 35258616 DOI: 10.1242/jeb.243409] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 12/20/2021] [Indexed: 12/21/2022]
Abstract
Ice-binding proteins (IBPs) have evolved independently in multiple taxonomic groups to improve their survival at sub-zero temperatures. Intertidal invertebrates in temperate and polar regions frequently encounter sub-zero temperatures, yet there is little information on IBPs in these organisms. We hypothesized that there are far more IBPs than are currently known and that the occurrence of freezing in the intertidal zone selects for these proteins. We compiled a list of genome-sequenced invertebrates across multiple habitats and a list of known IBP sequences and used BLAST to identify a wide array of putative IBPs in those invertebrates. We found that the probability of an invertebrate species having an IBP was significantly greater in intertidal species than in those primarily found in open ocean or freshwater habitats. These intertidal IBPs had high sequence similarity to fish and tick antifreeze glycoproteins and fish type II antifreeze proteins. Previously established classifiers based on machine learning techniques further predicted ice-binding activity in the majority of our newly identified putative IBPs. We investigated the potential evolutionary origin of one putative IBP from the hard-shelled mussel Mytilus coruscus and suggest that it arose through gene duplication and neofunctionalization. We show that IBPs likely readily evolve in response to freezing risk and that there is an array of uncharacterized IBPs, and highlight the need for broader laboratory-based surveys of the diversity of ice-binding activity across diverse taxonomic and ecological groups.
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Affiliation(s)
- Isaiah C H Box
- Department of Zoology, University of British Columbia, 6270 University Blvd, Vancouver, BC, CanadaV6T 1Z4
| | - Benjamin J Matthews
- Department of Zoology, University of British Columbia, 6270 University Blvd, Vancouver, BC, CanadaV6T 1Z4
| | - Katie E Marshall
- Department of Zoology, University of British Columbia, 6270 University Blvd, Vancouver, BC, CanadaV6T 1Z4
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5
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Vancaester E, Depuydt T, Osuna-Cruz CM, Vandepoele K. Comprehensive and Functional Analysis of Horizontal Gene Transfer Events in Diatoms. Mol Biol Evol 2021; 37:3243-3257. [PMID: 32918458 DOI: 10.1093/molbev/msaa182] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Diatoms are a diverse group of mainly photosynthetic algae, responsible for 20% of worldwide oxygen production, which can rapidly respond to favorable conditions and often outcompete other phytoplankton. We investigated the contribution of horizontal gene transfer (HGT) to its ecological success. A large-scale phylogeny-based prokaryotic HGT detection procedure across nine sequenced diatoms showed that 3-5% of their proteome has a horizontal origin and a large influx occurred at the ancestor of diatoms. More than 90% of HGT genes are expressed, and species-specific HGT genes in Phaeodactylum tricornutum undergo strong purifying selection. Genes derived from HGT are implicated in several processes including environmental sensing and expand the metabolic toolbox. Cobalamin (vitamin B12) is an essential cofactor for roughly half of the diatoms and is only produced by bacteria. Five consecutive genes involved in the final synthesis of the cobalamin biosynthetic pathway, which could function as scavenging and repair genes, were detected as HGT. The full suite of these genes was detected in the cold-adapted diatom Fragilariopsis cylindrus. This might give diatoms originating from the Southern Ocean, a region typically depleted in cobalamin, a competitive advantage. Overall, we show that HGT is a prevalent mechanism that is actively used in diatoms to expand its adaptive capabilities.
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Affiliation(s)
- Emmelien Vancaester
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium.,VIB Center for Plant Systems Biology, Ghent, Belgium.,Bioinformatics Institute Ghent, Ghent University, Ghent, Belgium
| | - Thomas Depuydt
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium.,VIB Center for Plant Systems Biology, Ghent, Belgium.,Bioinformatics Institute Ghent, Ghent University, Ghent, Belgium
| | - Cristina Maria Osuna-Cruz
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium.,VIB Center for Plant Systems Biology, Ghent, Belgium.,Bioinformatics Institute Ghent, Ghent University, Ghent, Belgium
| | - Klaas Vandepoele
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium.,VIB Center for Plant Systems Biology, Ghent, Belgium.,Bioinformatics Institute Ghent, Ghent University, Ghent, Belgium
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6
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Stephens TG, González-Pech RA, Cheng Y, Mohamed AR, Burt DW, Bhattacharya D, Ragan MA, Chan CX. Genomes of the dinoflagellate Polarella glacialis encode tandemly repeated single-exon genes with adaptive functions. BMC Biol 2020; 18:56. [PMID: 32448240 PMCID: PMC7245778 DOI: 10.1186/s12915-020-00782-8] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Accepted: 04/20/2020] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Dinoflagellates are taxonomically diverse and ecologically important phytoplankton that are ubiquitously present in marine and freshwater environments. Mostly photosynthetic, dinoflagellates provide the basis of aquatic primary production; most taxa are free-living, while some can form symbiotic and parasitic associations with other organisms. However, knowledge of the molecular mechanisms that underpin the adaptation of these organisms to diverse ecological niches is limited by the scarce availability of genomic data, partly due to their large genome sizes estimated up to 250 Gbp. Currently available dinoflagellate genome data are restricted to Symbiodiniaceae (particularly symbionts of reef-building corals) and parasitic lineages, from taxa that have smaller genome size ranges, while genomic information from more diverse free-living species is still lacking. RESULTS Here, we present two draft diploid genome assemblies of the free-living dinoflagellate Polarella glacialis, isolated from the Arctic and Antarctica. We found that about 68% of the genomes are composed of repetitive sequence, with long terminal repeats likely contributing to intra-species structural divergence and distinct genome sizes (3.0 and 2.7 Gbp). For each genome, guided using full-length transcriptome data, we predicted > 50,000 high-quality protein-coding genes, of which ~40% are in unidirectional gene clusters and ~25% comprise single exons. Multi-genome comparison unveiled genes specific to P. glacialis and a common, putatively bacterial origin of ice-binding domains in cold-adapted dinoflagellates. CONCLUSIONS Our results elucidate how selection acts within the context of a complex genome structure to facilitate local adaptation. Because most dinoflagellate genes are constitutively expressed, Polarella glacialis has enhanced transcriptional responses via unidirectional, tandem duplication of single-exon genes that encode functions critical to survival in cold, low-light polar environments. These genomes provide a foundational reference for future research on dinoflagellate evolution.
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Affiliation(s)
- Timothy G Stephens
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, 4072, Australia.,Present Address: Department of Biochemistry and Microbiology, Rutgers University, New Brunswick, NJ, 08901, USA
| | - Raúl A González-Pech
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, 4072, Australia.,Present address: Department of Integrative Biology, University of South Florida, Tampa, FL, 33620, USA
| | - Yuanyuan Cheng
- UQ Genomics Initiative, The University of Queensland, Brisbane, QLD, 4072, Australia.,Present Address: Faculty of Science, School of Life and Environmental Sciences, The University of Sydney, Camperdown, NSW, 2006, Australia
| | - Amin R Mohamed
- Commonwealth Scientific and Industrial Research Organisation (CSIRO) Agriculture and Food, Queensland Bioscience Precinct, Brisbane, QLD, 4067, Australia
| | - David W Burt
- UQ Genomics, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Debashish Bhattacharya
- Department of Biochemistry and Microbiology, Rutgers University, New Brunswick, NJ, 08901, USA
| | - Mark A Ragan
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Cheong Xin Chan
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, 4072, Australia. .,School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, 4072, Australia. .,Australian Centre for Ecogenomics, The University of Queensland, Brisbane, QLD, 4072, Australia.
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7
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Di Dato V, Barbarinaldi R, Amato A, Di Costanzo F, Fontanarosa C, Perna A, Amoresano A, Esposito F, Cutignano A, Ianora A, Romano G. Variation in prostaglandin metabolism during growth of the diatom Thalassiosira rotula. Sci Rep 2020; 10:5374. [PMID: 32214130 PMCID: PMC7096440 DOI: 10.1038/s41598-020-61967-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Accepted: 02/28/2020] [Indexed: 02/03/2023] Open
Abstract
Prostaglandins (PGs) are hormone-like mediators in many physiological and pathological processes that are present in all vertebrates, in some terrestrial and aquatic invertebrates, and have also been identified in some macroalgae. They have recently been reported also in marine microalgae but their role as chemical mediators is largely unknown. Here we studied the expression pattern of the PG biosynthetic pathway during different growth phases of the centric diatom Thalassiosira rotula and assessed the release of PGs in the surrounding environment for the first time. We show that enzymes responsible for PGs formation such as cyclooxygenase, prostaglandin E synthase 2-like and prostaglandin F synthase are mainly expressed at the end of the exponential phase and that PGs are released especially during the stationary and senescent phases, suggesting a possible signaling function for these compounds. Phylogenetic analysis of the limiting enzyme, COX, indicate the presence in diatoms of more than one enzyme related to the oxidative metabolism of fatty acids belonging to the peroxidase-cyclooxygenase superfamily. These findings suggest a more complex evolution and diversity of metabolic pathways leading to the synthesis of lipid mediators in diatoms.
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Affiliation(s)
- Valeria Di Dato
- Stazione Zoologica Anton Dohrn, Villa Comunale, 80121, Napoli, Italy.
| | | | - Alberto Amato
- Laboratoire de Physiologie Cellulaire Végétale, Université Grenoble Alpes, CEA, CNRS, INRA, IRIG-LPCV 38054, Grenoble Cedex 9, France
| | | | - Carolina Fontanarosa
- Dipartimento di Scienze Chimiche, Università degli Studi di Napoli, Monte Sant'Angelo, 80126, Napoli, Italy
| | - Anna Perna
- Stazione Zoologica Anton Dohrn, Villa Comunale, 80121, Napoli, Italy
| | - Angela Amoresano
- Dipartimento di Scienze Chimiche, Università degli Studi di Napoli, Monte Sant'Angelo, 80126, Napoli, Italy
| | | | - Adele Cutignano
- Istituto di Chimica Biomolecolare-CNR, Via Campi Flegrei 34, 80078, Pozzuoli, Napoli, Italy
| | - Adrianna Ianora
- Stazione Zoologica Anton Dohrn, Villa Comunale, 80121, Napoli, Italy
| | - Giovanna Romano
- Stazione Zoologica Anton Dohrn, Villa Comunale, 80121, Napoli, Italy
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8
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Cho SM, Kim S, Cho H, Lee H, Lee JH, Lee H, Park H, Kang S, Choi HG, Lee J. Type II Ice-Binding Proteins Isolated from an Arctic Microalga Are Similar to Adhesin-Like Proteins and Increase Freezing Tolerance in Transgenic Plants. PLANT & CELL PHYSIOLOGY 2019; 60:2744-2757. [PMID: 31418793 DOI: 10.1093/pcp/pcz162] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 08/11/2019] [Indexed: 06/10/2023]
Abstract
Microalgal ice-binding proteins (IBPs) in the polar region are poorly understood at the genome-wide level, although they are important for cold adaptation. Through the transcriptome study with the Arctic green alga Chloromonas sp. KNF0032, we identified six Chloromonas IBP genes (CmIBPs), homologous with the previously reported IBPs from Antarctic snow alga CCMP681 and Antarctic Chloromonas sp. They were organized with multiple exon/intron structures and low-temperature-responsive cis-elements in their promoters and abundantly expressed at low temperature. The biological functions of three representative CmIBPs (CmIBP1, CmIBP2 and CmIBP3) were tested using in vitro analysis and transgenic plant system. CmIBP1 had the most effective ice recrystallization inhibition (IRI) activities in both in vitro and transgenic plants, and CmIBP2 and CmIBP3 had followed. All transgenic plants grown under nonacclimated condition were freezing tolerant, and especially 35S::CmIBP1 plants were most effective. After cold acclimation, only 35S::CmIBP2 plants showed slightly increased freezing tolerance. Structurally, the CmIBPs were predicted to have β-solenoid forms with parallel β-sheets and repeated TXT motifs. The repeated TXT structure of CmIBPs appears similar to the AidA domain-containing adhesin-like proteins from methanogens. We have shown that the AidA domain has IRI activity as CmIBPs and phylogenetic analysis also supported that the AidA domains are monophyletic with ice-binding domain of CmIBPs, and these results suggest that CmIBPs are a type of modified adhesins.
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Affiliation(s)
- Sung Mi Cho
- Unit of Polar Genomics, Korea Polar Research Institute (KOPRI), Yeonsu-gu, Incheon 21990, Republic of Korea
| | - Sanghee Kim
- Division of Polar Life Sciences, Korea Polar Research Institute (KOPRI), Yeonsu-gu, Incheon 21990, Republic of Korea
| | - Hojin Cho
- Unit of Polar Genomics, Korea Polar Research Institute (KOPRI), Yeonsu-gu, Incheon 21990, Republic of Korea
- Department of Polar Science, University of Science and Technology, Daejeon 34113, Republic of Korea
| | - Hyoungseok Lee
- Unit of Polar Genomics, Korea Polar Research Institute (KOPRI), Yeonsu-gu, Incheon 21990, Republic of Korea
- Department of Polar Science, University of Science and Technology, Daejeon 34113, Republic of Korea
| | - Jun Hyuck Lee
- Unit of Polar Genomics, Korea Polar Research Institute (KOPRI), Yeonsu-gu, Incheon 21990, Republic of Korea
- Department of Polar Science, University of Science and Technology, Daejeon 34113, Republic of Korea
| | - Horim Lee
- Department of Biotechnology, Duksung Women's University, Seoul 01369, Republic of Korea
| | - Hyun Park
- Unit of Polar Genomics, Korea Polar Research Institute (KOPRI), Yeonsu-gu, Incheon 21990, Republic of Korea
- Department of Polar Science, University of Science and Technology, Daejeon 34113, Republic of Korea
- Division of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul 02841, Republic of Korea
| | - Seunghyun Kang
- Unit of Polar Genomics, Korea Polar Research Institute (KOPRI), Yeonsu-gu, Incheon 21990, Republic of Korea
| | - Han-Gu Choi
- Division of Polar Life Sciences, Korea Polar Research Institute (KOPRI), Yeonsu-gu, Incheon 21990, Republic of Korea
| | - Jungeun Lee
- Unit of Polar Genomics, Korea Polar Research Institute (KOPRI), Yeonsu-gu, Incheon 21990, Republic of Korea
- Department of Polar Science, University of Science and Technology, Daejeon 34113, Republic of Korea
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9
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Raymond JA, Remias D. Ice-Binding Proteins in a Chrysophycean Snow Alga: Acquisition of an Essential Gene by Horizontal Gene Transfer. Front Microbiol 2019; 10:2697. [PMID: 31849866 PMCID: PMC6892780 DOI: 10.3389/fmicb.2019.02697] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 11/06/2019] [Indexed: 01/08/2023] Open
Abstract
All ice-associated algae examined so far have genes for ice-binding proteins (IBPs), which suggest that these proteins are essential for survival in icy habitats. The most common type of IBP, type 1 IBPs (also referred to as DUF3494 IBPs), is also found in ice-associated bacteria and fungi. Previous studies have suggested that algal IBP genes were acquired by horizontal transfer from other microorganisms (probably bacteria). However, it remains unclear whether this is also the case for algae distantly related to the ones examined so far and whether microorganisms other than bacteria could be the donors. Furthermore, there is only limited evidence that these proteins are expressed at low temperature. Here, we show that Kremastochrysopsis austriaca (Chrysophyceae), an Austrian snow alga that is not closely related to any of the ice-associated algae examined so far, also produces IBPs, although their activity was weak. Sequencing the algal genome and the transcriptomes of cells grown at 1 and 15°C revealed three isoforms of a type 1 IBP. In agreement with their putative function, the three isoforms were strongly upregulated by one to two orders of magnitude at 1°C compared to 15°C. In a phylogenetic tree, the K. austriaca IBPs were distant from other algal IBPs, with the closest matches being bacterial proteins. These results suggest that the K. austriaca IBPs were derived from a gene that was acquired from a bacterium unrelated to other IBP donor bacteria and confirm by their presence in yet another alga the essential role of algal IBPs.
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Affiliation(s)
- James A Raymond
- School of Life Sciences, University of Nevada Las Vegas, Las Vegas, NV, United States
| | - Daniel Remias
- School of Engineering, University of Applied Sciences Upper Austria, Wels, Austria
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10
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Vance TDR, Bayer-Giraldi M, Davies PL, Mangiagalli M. Ice-binding proteins and the 'domain of unknown function' 3494 family. FEBS J 2019; 286:855-873. [PMID: 30680879 DOI: 10.1111/febs.14764] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 01/03/2019] [Accepted: 01/22/2019] [Indexed: 02/03/2023]
Abstract
Ice-binding proteins (IBPs) control the growth and shape of ice crystals to cope with subzero temperatures in psychrophilic and freeze-tolerant organisms. Recently, numerous proteins containing the domain of unknown function (DUF) 3494 were found to bind ice crystals and, hence, are classified as IBPs. DUF3494 IBPs constitute today the most widespread of the known IBP families. They can be found in different organisms including bacteria, yeasts and microalgae, supporting the hypothesis of horizontal transfer of its gene. Although the 3D structure is always a discontinuous β-solenoid with a triangular cross-section and an adjacent alpha-helix, DUF3494 IBPs present very diverse activities in terms of the magnitude of their thermal hysteresis and inhibition of ice recrystallization. The proteins are secreted into the environments around the host cells or are anchored on their cell membranes. This review covers several aspects of this new class of IBPs, which promise to leave their mark on several research fields including structural biology, protein biochemistry and cryobiology.
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Affiliation(s)
- Tyler D R Vance
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Canada
| | - Maddalena Bayer-Giraldi
- Department of Glaciology, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
| | - Peter L Davies
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Canada
| | - Marco Mangiagalli
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Italy
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11
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Arai T, Fukami D, Hoshino T, Kondo H, Tsuda S. Ice-binding proteins from the fungus Antarctomyces psychrotrophicus possibly originate from two different bacteria through horizontal gene transfer. FEBS J 2018; 286:946-962. [PMID: 30548092 DOI: 10.1111/febs.14725] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 11/03/2018] [Accepted: 12/06/2018] [Indexed: 12/12/2022]
Abstract
Various microbes, including fungi and bacteria, that live in cold environments produce ice-binding proteins (IBPs) that protect them from freezing. Ascomycota and Basidiomycota are two major phyla of fungi, and Antarctomyces psychrotrophicus is currently designated as the sole ascomycete that produces IBP (AnpIBP). However, its complete amino acid sequence, ice-binding property, and evolutionary history have not yet been clarified. Here, we determined the peptide sequences of three new AnpIBP isoforms by total cDNA analysis and compared them with those of other microbial IBPs. The AnpIBP isoforms and ascomycete-putative IBPs were found to be phylogenetically close to the bacterial ones but far from the basidiomycete ones, which is supported by the higher sequence identities to bacterial IBPs than basidiomycete IBPs, although ascomycetes are phylogenetically distant from bacteria. In addition, two of the isoforms of AnpIBP share low sequence identity and are not close in the phylogenetic tree. It is hence presumable that these two AnpIBP isoforms were independently acquired from different bacteria through horizontal gene transfer (HGT), which implies that ascomycetes and bacteria frequently exchange their IBP genes. The non-colligative freezing-point depression ability of AnpIBP was not very high, whereas it exhibited significant abilities of ice recrystallization inhibition, ice shaping, and cryo-protection against freeze-thaw cycles even at submicromolar concentrations. These results suggest that HGT is crucial for the cold-adaptive evolution of ascomycetes, and their IBPs offer freeze resistance to organisms to enable them to inhabit the icy environments of Antarctica. DATABASES: Nucleotide sequence data are available in the DDBJ database under the accession numbers LC378707, LC378707, LC378707 for AnpIBP1a, AnpIBP1b, AnpIBP2, respectively.
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Affiliation(s)
- Tatsuya Arai
- Graduate School of Life Science, Hokkaido University, Sapporo, Japan
| | - Daichi Fukami
- Graduate School of Life Science, Hokkaido University, Sapporo, Japan
| | - Tamotsu Hoshino
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Sapporo, Japan
| | - Hidemasa Kondo
- Graduate School of Life Science, Hokkaido University, Sapporo, Japan.,Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Sapporo, Japan
| | - Sakae Tsuda
- Graduate School of Life Science, Hokkaido University, Sapporo, Japan.,Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Sapporo, Japan.,OPERANDO Open Innovation Laboratory, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan
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12
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Growth suppression of ice crystal basal face in the presence of a moderate ice-binding protein does not confer hyperactivity. Proc Natl Acad Sci U S A 2018; 115:7479-7484. [PMID: 29967176 DOI: 10.1073/pnas.1807461115] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Ice-binding proteins (IBPs) affect ice crystal growth by attaching to crystal faces. We present the effects on the growth of an ice single crystal caused by an ice-binding protein from the sea ice microalga Fragilariopsis cylindrus (fcIBP) that is characterized by the widespread domain of unknown function 3494 (DUF3494) and known to cause a moderate freezing point depression (below 1 °C). By the application of interferometry, bright-field microscopy, and fluorescence microscopy, we observed that the fcIBP attaches to the basal faces of ice crystals, thereby inhibiting their growth in the c direction and resulting in an increase in the effective supercooling with increasing fcIBP concentration. In addition, we observed that the fcIBP attaches to prism faces and inhibits their growth. In the event that the effective supercooling is small and crystals are faceted, this process causes an emergence of prism faces and suppresses crystal growth in the a direction. When the effective supercooling is large and ice crystals have developed into a dendritic shape, the suppression of prism face growth results in thinner dendrite branches, and growth in the a direction is accelerated due to enhanced latent heat dissipation. Our observations clearly indicate that the fcIBP occupies a separate position in the classification of IBPs due to the fact that it suppresses the growth of basal faces, despite its moderate freezing point depression.
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13
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Raymond JA, Morgan-Kiss R. Multiple ice-binding proteins of probable prokaryotic origin in an Antarctic lake alga, Chlamydomonas sp. ICE-MDV (Chlorophyceae). JOURNAL OF PHYCOLOGY 2017; 53:848-854. [PMID: 28543018 PMCID: PMC5546997 DOI: 10.1111/jpy.12550] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Accepted: 03/27/2017] [Indexed: 05/14/2023]
Abstract
Ice-associated algae produce ice-binding proteins (IBPs) to prevent freezing damage. The IBPs of the three chlorophytes that have been examined so far share little similarity across species, making it likely that they were acquired by horizontal gene transfer (HGT). To clarify the importance and source of IBPs in chlorophytes, we sequenced the IBP genes of another Antarctic chlorophyte, Chlamydomonas sp. ICE-MDV (Chlamy-ICE). Genomic DNA and total RNA were sequenced and screened for known ice-associated genes. Chlamy-ICE has as many as 50 IBP isoforms, indicating that they have an important role in survival. The IBPs are of the DUF3494 type and have similar exon structures. The DUF3494 sequences are much more closely related to prokaryotic sequences than they are to sequences in other chlorophytes, and the chlorophyte IBP and ribosomal 18S phylogenies are dissimilar. The multiple IBP isoforms found in Chlamy-ICE and other algae may allow the algae to adapt to a greater variety of ice conditions than prokaryotes, which typically have a single IBP gene. The predicted structure of the DUF3494 domain has an ice-binding face with an orderly array of hydrophilic side chains. The results indicate that Chlamy-ICE acquired its IBP genes by HGT in a single event. The acquisitions of IBP genes by this and other species of Antarctic algae by HGT appear to be key evolutionary events that allowed algae to extend their ranges into polar environments.
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Affiliation(s)
- James A. Raymond
- School of Life Sciences, University of Nevada, Las Vegas, Las Vegas, Nevada 89154 USA
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14
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Jung W, Campbell RL, Gwak Y, Kim JI, Davies PL, Jin E. New Cysteine-Rich Ice-Binding Protein Secreted from Antarctic Microalga, Chloromonas sp. PLoS One 2016; 11:e0154056. [PMID: 27097164 PMCID: PMC4838330 DOI: 10.1371/journal.pone.0154056] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 04/07/2016] [Indexed: 11/18/2022] Open
Abstract
Many microorganisms in Antarctica survive in the cold environment there by producing ice-binding proteins (IBPs) to control the growth of ice around them. An IBP from the Antarctic freshwater microalga, Chloromonas sp., was identified and characterized. The length of the Chloromonas sp. IBP (ChloroIBP) gene was 3.2 kb with 12 exons, and the molecular weight of the protein deduced from the ChloroIBP cDNA was 34.0 kDa. Expression of the ChloroIBP gene was up- and down-regulated by freezing and warming conditions, respectively. Western blot analysis revealed that native ChloroIBP was secreted into the culture medium. This protein has fifteen cysteines and is extensively disulfide bonded as shown by in-gel mobility shifts between oxidizing and reducing conditions. The open-reading frame of ChloroIBP was cloned and over-expressed in Escherichia coli to investigate the IBP’s biochemical characteristics. Recombinant ChloroIBP produced as a fusion protein with thioredoxin was purified by affinity chromatography and formed single ice crystals of a dendritic shape with a thermal hysteresis activity of 0.4±0.02°C at a concentration of 5 mg/ml. In silico structural modeling indicated that the three-dimensional structure of ChloroIBP was that of a right-handed β-helix. Site-directed mutagenesis of ChloroIBP showed that a conserved region of six parallel T-X-T motifs on the β-2 face was the ice-binding region, as predicted from the model. In addition to disulfide bonding, hydrophobic interactions between inward-pointing residues on the β-1 and β-2 faces, in the region of ice-binding motifs, were crucial to maintaining the structural conformation of ice-binding site and the ice-binding activity of ChloroIBP.
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Affiliation(s)
- Woongsic Jung
- Department of Life Science, Hanyang University, Seoul, South Korea
| | - Robert L. Campbell
- Department of Biomedical and Molecular Sciences, Queen’s University, Kingston, Canada K7L-3N6
| | - Yunho Gwak
- Department of Life Science, Hanyang University, Seoul, South Korea
| | - Jong Im Kim
- Department of Biology, Chungnam National University, Daejeon, South Korea
| | - Peter L. Davies
- Department of Biomedical and Molecular Sciences, Queen’s University, Kingston, Canada K7L-3N6
- * E-mail: (PLD); (EJ)
| | - EonSeon Jin
- Department of Life Science, Hanyang University, Seoul, South Korea
- * E-mail: (PLD); (EJ)
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15
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Cid FP, Rilling JI, Graether SP, Bravo LA, Mora MDLL, Jorquera MA. Properties and biotechnological applications of ice-binding proteins in bacteria. FEMS Microbiol Lett 2016; 363:fnw099. [PMID: 27190285 DOI: 10.1093/femsle/fnw099] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/12/2016] [Indexed: 01/04/2023] Open
Abstract
Ice-binding proteins (IBPs), such as antifreeze proteins (AFPs) and ice-nucleating proteins (INPs), have been described in diverse cold-adapted organisms, and their potential applications in biotechnology have been recognized in various fields. Currently, both IBPs are being applied to biotechnological processes, primarily in medicine and the food industry. However, our knowledge regarding the diversity of bacterial IBPs is limited; few studies have purified and characterized AFPs and INPs from bacteria. Phenotypically verified IBPs have been described in members belonging to Gammaproteobacteria, Actinobacteria and Flavobacteriia classes, whereas putative IBPs have been found in Gammaproteobacteria, Alphaproteobacteria and Bacilli classes. Thus, the main goal of this minireview is to summarize the current information on bacterial IBPs and their application in biotechnology, emphasizing the potential application in less explored fields such as agriculture. Investigations have suggested the use of INP-producing bacteria antagonists and AFPs-producing bacteria (or their AFPs) as a very attractive strategy to prevent frost damages in crops. UniProt database analyses of reported IBPs (phenotypically verified) and putative IBPs also show the limited information available on bacterial IBPs and indicate that major studies are required.
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Affiliation(s)
- Fernanda P Cid
- Programa de Doctorado en Ciencias de Recursos Naturales, Universidad de La Frontera, Temuco 4811230, Chile
| | - Joaquín I Rilling
- Programa de Doctorado en Ciencias de Recursos Naturales, Universidad de La Frontera, Temuco 4811230, Chile
| | - Steffen P Graether
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Leon A Bravo
- Center of Plant, Soil Interaction and Natural Resources Biotechnology, Scientific and Technological Bioresource Nucleus, Universidad de La Frontera, Temuco 4811230, Chile Departamento de Ciencias Agronómicas y Recursos Naturales, Facultad de Ciencias Agropecuarias y Forestales, Universidad de la Frontera, Temuco 4811230, Chile
| | - María de La Luz Mora
- Center of Plant, Soil Interaction and Natural Resources Biotechnology, Scientific and Technological Bioresource Nucleus, Universidad de La Frontera, Temuco 4811230, Chile
| | - Milko A Jorquera
- Center of Plant, Soil Interaction and Natural Resources Biotechnology, Scientific and Technological Bioresource Nucleus, Universidad de La Frontera, Temuco 4811230, Chile
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16
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Davies PL. Antarctic moss is home to many epiphytic bacteria that secrete antifreeze proteins. ENVIRONMENTAL MICROBIOLOGY REPORTS 2016; 8:1-2. [PMID: 26790542 DOI: 10.1111/1758-2229.12360] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
- Peter L Davies
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON, Canada, K7L 3N6
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17
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In situ expression of eukaryotic ice-binding proteins in microbial communities of Arctic and Antarctic sea ice. ISME JOURNAL 2015; 9:2537-40. [PMID: 25885562 PMCID: PMC4611500 DOI: 10.1038/ismej.2015.43] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Revised: 02/17/2015] [Accepted: 02/26/2015] [Indexed: 11/29/2022]
Abstract
Ice-binding proteins (IBPs) have been isolated from various sea-ice organisms. Their characterisation points to a crucial role in protecting the organisms in sub-zero environments. However, their in situ abundance and diversity in natural sea-ice microbial communities is largely unknown. In this study, we analysed the expression and phylogenetic diversity of eukaryotic IBP transcripts from microbial communities of Arctic and Antarctic sea ice. IBP transcripts were found in abundances similar to those of proteins involved in core cellular processes such as photosynthesis. Eighty-nine percent of the IBP transcripts grouped with known IBP sequences from diatoms, haptophytes and crustaceans, but the majority represented novel sequences not previously characterized in cultured organisms. The observed high eukaryotic IBP expression in natural eukaryotic sea ice communities underlines the essential role of IBPs for survival of many microorganisms in communities living under the extreme conditions of polar sea ice.
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18
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Banerjee R, Chakraborti P, Bhowmick R, Mukhopadhyay S. Distinct molecular features facilitating ice-binding mechanisms in hyperactive antifreeze proteins closely related to an Antarctic sea ice bacterium. J Biomol Struct Dyn 2014; 33:1424-41. [PMID: 25190099 DOI: 10.1080/07391102.2014.952665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Antifreeze proteins or ice-binding proteins (IBPs) facilitate the survival of certain cellular organisms in freezing environment by inhibiting the growth of ice crystals in solution. Present study identifies orthologs of the IBP of Colwellia sp. SLW05, which were obtained from a wide range of taxa. Phylogenetic analysis on the basis of conserved regions (predicted as the 'ice-binding domain' [IBD]) present in all the orthologs, separates the bacterial and archaeal orthologs from that of the eukaryotes'. Correspondence analysis pointed out that the bacterial and archaeal IBDs have relatively higher average hydrophobicity than the eukaryotic members. IBDs belonging to bacterial as well as archaeal AFPs contain comparatively more strands, and therefore are revealed to be under higher evolutionary selection pressure. Molecular docking studies prove that the ice crystals form more stable complex with the bacterial as well as archaeal proteins than the eukaryotic orthologs. Analysis of the docked structures have traced out the ice-binding sites (IBSs) in all the orthologs which continue to facilitate ice-binding activity even after getting mutated with respect to the well-studied IBSs of Typhula ishikariensis and notably, all these mutations performing ice-binding using 'anchored clathrate mechanism' have been found to prefer polar and hydrophilic amino acids. Horizontal gene transfer studies point toward a strong selection pressure favoring independent evolution of the IBPs in some polar organisms including prokaryotes as well as eukaryotes because these proteins facilitate the polar organisms to acclimatize to the adversities in their niche, thus safeguarding their existence.
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Affiliation(s)
- Rachana Banerjee
- a Department of Biophysics, Molecular Biology and Bioinformatics , University of Calcutta , 92, A.P.C. Road, Kolkata 700009 , India
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19
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Gwak Y, Jung W, Lee Y, Kim JS, Kim CG, Ju JH, Song C, Hyun JK, Jin E. An intracellular antifreeze protein from an Antarctic microalga that responds to various environmental stresses. FASEB J 2014; 28:4924-35. [PMID: 25114178 DOI: 10.1096/fj.14-256388] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The structure and function of the Antarctic marine diatom Chaetoceros neogracile antifreeze protein (Cn-AFP), as well as its expression levels and characteristics of the ice-binding site, were analyzed in the present study. In silico analysis revealed that the Cn-AFP promoter contains both light- and temperature-responsive elements. Northern and Western blot analyses demonstrated that both Cn-AFP transcript and protein expression were strongly and rapidly stimulated by freezing, as well as temperature and high light stress. Immunogold labeling revealed that Cn-AFP is preferentially localized to the intracellular space near the chloroplast membrane. Recombinant Cn-AFP had clear antifreeze activity. Protein-folding simulation was used to predict the putative ice-binding sites in Cn-AFP, and site-directed mutagenesis of the Cn-AFP b-face confirmed their identification.
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Affiliation(s)
- Yunho Gwak
- Department of Life Science, Research Institute for Natural Sciences, Hanyang University, Seoul, Republic of Korea
| | - Woongsic Jung
- Department of Life Science, Research Institute for Natural Sciences, Hanyang University, Seoul, Republic of Korea; Division of Polar Life Science, Korea Polar Research Institute, Incheon, Republic of Korea; and
| | - Yew Lee
- Department of Life Science, Research Institute for Natural Sciences, Hanyang University, Seoul, Republic of Korea
| | - Ji Sook Kim
- Department of Life Science, Research Institute for Natural Sciences, Hanyang University, Seoul, Republic of Korea
| | - Chul Geun Kim
- Department of Life Science, Research Institute for Natural Sciences, Hanyang University, Seoul, Republic of Korea
| | - Ji-Hyun Ju
- Department of Life Science, Research Institute for Natural Sciences, Hanyang University, Seoul, Republic of Korea
| | - Chihong Song
- Division of Electron Microscopic Research, Korea Basic Science Institute, Daejeon, Republic of Korea
| | - Jae-Kyung Hyun
- Division of Electron Microscopic Research, Korea Basic Science Institute, Daejeon, Republic of Korea
| | - EonSeon Jin
- Department of Life Science, Research Institute for Natural Sciences, Hanyang University, Seoul, Republic of Korea;
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20
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Chen Y, Cao J. Comparative genomic analysis of the Sm gene family in rice and maize. Gene 2014; 539:238-49. [PMID: 24525402 DOI: 10.1016/j.gene.2014.02.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2013] [Revised: 02/03/2014] [Accepted: 02/06/2014] [Indexed: 10/25/2022]
Abstract
Sm proteins are a group of ubiquitous ring-shaped oligomers that function in multiple aspects of RNA metabolism. However, until this study, no comprehensive study incorporating phylogeny, chromosomal location, gene organization, adaptive evolution, expression profiling and functional networks has been reported for rice and maize. In this study, twenty-five and thirty-three Sm genes have been identified in rice and maize, respectively. Phylogenetic analyses identified eighteen gene groups. Results by gene locations indicated that segmental duplication contributes to the expansion of this gene family in rice and maize. Gene organization and motif compositions of the Sm members are highly conserved in each group, indicative of their functional conservation. Expression profiles have provided insights into the possible functional divergence among members of the Sm gene family. Adaptive evolution analyses suggested that purifying selection was the main force driving Sm evolution, but some critical sites might be responsible for functional divergence. In addition, four hundred and seventy-nine interactions were identified by functional network analyses, and most of which were associated with binding, cellular macromolecule biosynthesis, pre-mRNA processing and transferase activity. Overall, the data contribute to a better understanding of the complexity of Sm gene family in rice and maize and will provide a solid foundation for future functional studies.
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Affiliation(s)
- Yuzhu Chen
- Institute of Life Science, Jiangsu University, Zhenjiang, Jiangsu, PR China
| | - Jun Cao
- Institute of Life Science, Jiangsu University, Zhenjiang, Jiangsu, PR China.
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21
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Singh P, Hanada Y, Singh SM, Tsuda S. Antifreeze protein activity in Arctic cryoconite bacteria. FEMS Microbiol Lett 2013; 351:14-22. [PMID: 24283367 DOI: 10.1111/1574-6968.12345] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2013] [Revised: 11/23/2013] [Accepted: 11/24/2013] [Indexed: 11/30/2022] Open
Abstract
Fourteen Arctic bacterial strains belonging to five genera, Cryobacterium, Leifsonia, Polaromonas, Pseudomonas, and Subtercola isolated from sediments found in cryoconite holes of Arctic glaciers, were subjected to screening for antifreeze proteins (AFPs). Eight strains showed AFP activity, and six strains of four species were further characterized. Pseudomonas ficuserectae exhibited a high thermal hysteresis (TH) activity. Ice recrystallization inhibition (IRI) activity was observed in most cultures at low protein concentration. Bacterial AFPs produced rounded shape of ice crystals that did not change their size and morphology within the TH window. Cry-g (P. ficuserectae) failed to inhibit ice recrystallization, indicating that the IRI activity of the AFPs does not relate to the strength of TH activity. SDS-PAGE analysis of the AFPs suggests their apparent molecular weights to be around 23 kDa. This study is significant as it screens several species of Arctic bacterial strains for AFP activity. So far, only one species of bacteria, Pseudomonas putida, was reported from the Arctic to produce AFPs. N-terminal amino acid sequence analysis shows that the bacterial AFPs isolated belong to the AFP family IBP-1, which is known to have an important physiological role in the cold environment. AFPs of glacier cryoconite habitat have been discussed.
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Affiliation(s)
- Purnima Singh
- Birla Institute of Technology and Science (BITS), Goa campus, Zuarinagar, Goa, India
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22
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Cao J. The pectin lyases in Arabidopsis thaliana: evolution, selection and expression profiles. PLoS One 2012; 7:e46944. [PMID: 23056537 PMCID: PMC3467278 DOI: 10.1371/journal.pone.0046944] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Accepted: 09/06/2012] [Indexed: 11/22/2022] Open
Abstract
Pectin lyases are a group of enzymes that are thought to contribute to many biological processes, such as the degradation of pectin. However, until this study, no comprehensive study incorporating phylogeny, chromosomal location, gene duplication, gene organization, functional divergence, adaptive evolution, expression profiling and functional networks has been reported for Arabidopsis. Sixty-seven pectin lyase genes have been identified, and most of them possess signal sequences targeting the secretory pathway. Phylogenetic analyses identified five gene groups with considerable conservation among groups. Pectin lyase genes were non-randomly distributed across chromosomes and clustering was evident. Functional divergence and adaptive evolution analyses suggested that purifying selection was the main force driving pectin lyase evolution, although some critical sites responsible for functional divergence might be the consequence of positive selection. A stigma- and receptacle-specific expression promoter was identified, and it had increased expression in response to wounding. Two hundred and eighty-eight interactions were identified by functional network analyses, and most of these were involved in cellular metabolism, cellular transport and localization, and stimulus responses. This investigation contributes to an improved understanding of the complexity of the Arabidopsis pectin lyase gene family.
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Affiliation(s)
- Jun Cao
- Institute of Life Science, Jiangsu University, Zhenjiang, Jiangsu, P.R. China.
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23
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Sorhannus U. Evolution of Type II Antifreeze Protein Genes in Teleost Fish: A Complex Scenario Involving Lateral Gene Transfers and Episodic Directional Selection. Evol Bioinform Online 2012; 8:535-44. [PMID: 23032610 PMCID: PMC3460678 DOI: 10.4137/ebo.s9976] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
I examined hypotheses about lateral transfer of type II antifreeze protein (AFP) genes among “distantly” related teleost fish. The effects of episodic directional selection on amino acid evolution were also investigated. The strict consensus results showed that the type II AFP and type II antifreeze-like protein genes were transferred from Osmerus mordax to Clupea harengus, from the ancestral lineage of the Brachyopsis rostratus—Hemitripterus americanus clade to the ancestor of the Hypomesus nipponensis—Osmerus mordax group and from the ancestral lineage of Brachyopsis rostratus—Hemitripterus americanus—Siniperca chuatsi—Perca flavescens to Perca flavescens. At the present time, the available evidence is more consistent with the LGT hypothesis than with other alternative explanations. The overall results indicate that evolutionary history of the type II AFP gene is complex, and that episodic directional selection was instrumental in the evolution of this freeze-preventing protein from a C-type lectin precursor.
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Affiliation(s)
- Ulf Sorhannus
- Department of Biology and Health Services, Edinboro University of Pennsylvania, Edinboro, Pennsylvania, USA
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