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Rhodopsin from Haloquadratum walsbyi is a light-driven magnesium transporter.
Ko LN, Lim GZ, Chen JC, Ko T, Li GY, Yang CS. Ko LN, et al. Nat Commun. 2025 May 14;16(1):4472. doi: 10.1038/s41467-025-59795-y. Nat Commun. 2025. PMID: 40368960 Free PMC article.
The functionally unknown Middle rhodopsin (HwMR) is a microbial rhodopsin (mRho) identified in Haloquadratum walsbyi, an archaeon that thrives in a 2 M MgCl(2) environment harmful to most other microorganisms. ...
The functionally unknown Middle rhodopsin (HwMR) is a microbial rhodopsin (mRho) identified in Haloquadratum walsbyi, an archa …
Haloquadratum walsbyi Yields a Versatile, NAD(+)/NADP(+) Dual Affinity, Thermostable, Alcohol Dehydrogenase (HwADH).
Cassidy J, Paradisi F. Cassidy J, et al. Mol Biotechnol. 2018 Jun;60(6):420-426. doi: 10.1007/s12033-018-0083-6. Mol Biotechnol. 2018. PMID: 29654471
This study presents the first example of an alcohol dehydrogenase (ADH) from the halophilic archaeum Haloquadratum walsbyi (HwADH). A hexahistidine-tagged recombinant HwADH was heterologously overexpressed in Haloferax volcanii. ...The enzyme also accepted cyclohexa …
This study presents the first example of an alcohol dehydrogenase (ADH) from the halophilic archaeum Haloquadratum walsbyi (Hw …
Differences in gene expression patterns between cultured and natural Haloquadratum walsbyi ecotypes.
Rosselli R, López-Pérez M, Martin-Cuadrado AB, Rodriguez-Valera F, Bolhuis H. Rosselli R, et al. Front Microbiol. 2022 Nov 10;13:1044446. doi: 10.3389/fmicb.2022.1044446. eCollection 2022. Front Microbiol. 2022. PMID: 36439805 Free PMC article.
The microbial community in the solar saltern of Santa Pola (Alicante, Spain), is largely dominated by the hyperhalophilic square archaeon Haloquadratum walsbyi. Here we studied metatranscriptomes retrieved from a crystallizer pond during the winter of 2012 and summe …
The microbial community in the solar saltern of Santa Pola (Alicante, Spain), is largely dominated by the hyperhalophilic square archaeon …
Conditional Alternative Protein Splicing Promoted by Inteins from Haloquadratum walsbyi.
Yalala VR, Lynch AK, Mills KV. Yalala VR, et al. Biochemistry. 2022 Feb 15;61(4):294-302. doi: 10.1021/acs.biochem.1c00788. Epub 2022 Jan 24. Biochemistry. 2022. PMID: 35073064 Free PMC article.
Four inteins interrupt the MCM helicase of the halophile Haloquadratum walsbyi, two of which are mini-inteins that lack a homing endonuclease. Both inteins can be overexpressed in Escherichia coli and purified as unspliced precursors; splicing can be induced in vitr …
Four inteins interrupt the MCM helicase of the halophile Haloquadratum walsbyi, two of which are mini-inteins that lack a homi …
Transcriptome analysis of Haloquadratum walsbyi: vanity is but the surface.
Bolhuis H, Martín-Cuadrado AB, Rosselli R, Pašić L, Rodriguez-Valera F. Bolhuis H, et al. BMC Genomics. 2017 Jul 3;18(1):510. doi: 10.1186/s12864-017-3892-2. BMC Genomics. 2017. PMID: 28673248 Free PMC article.
BACKGROUND: Haloquadratum walsbyi dominates saturated thalassic lakes worldwide where they can constitute up to 80-90% of the total prokaryotic community. ...
BACKGROUND: Haloquadratum walsbyi dominates saturated thalassic lakes worldwide where they can constitute up to 80-90% of the …
Identification of an Amylomaltase from the Halophilic Archaeon Haloquadratum walsbyi by Functional Metagenomics: Structural and Functional Insights.
Leoni C, Manzari C, Tran H, Golyshin PN, Pesole G, Volpicella M, Ceci LR. Leoni C, et al. Life (Basel). 2022 Jan 7;12(1):85. doi: 10.3390/life12010085. Life (Basel). 2022. PMID: 35054477 Free PMC article.
In this work we report the identification, by means of a functional metagenomics screening of the crystallization waters of the saltern of Margherita di Savoia (Italy), of an amylomaltase gene from the halophilic archaeon Haloquadratum walsbyi, and its expression in …
In this work we report the identification, by means of a functional metagenomics screening of the crystallization waters of the saltern of M …
Haloquadratum walsbyi: limited diversity in a global pond.
Dyall-Smith ML, Pfeiffer F, Klee K, Palm P, Gross K, Schuster SC, Rampp M, Oesterhelt D. Dyall-Smith ML, et al. PLoS One. 2011;6(6):e20968. doi: 10.1371/journal.pone.0020968. Epub 2011 Jun 20. PLoS One. 2011. PMID: 21701686 Free PMC article.
BACKGROUND: Haloquadratum walsbyi commonly dominates the microbial flora of hypersaline waters. Its cells are extremely fragile squares requiring >14%(w/v) salt for growth, properties that should limit its dispersal and promote geographical isolation and divergen …
BACKGROUND: Haloquadratum walsbyi commonly dominates the microbial flora of hypersaline waters. Its cells are extremely fragil …
Global dominance of Haloquadratum walsbyi by a single genomovar with distinct gene content and viral cohorts from close relatives.
Bustos-Caparros E, Viver T, Gago JF, Avontuur JR, Amiour S, Baxter BK, Llames ME, Mutlu MB, Oren A, Ramírez AS, Stott MB, Venter SN, Santos F, Antón J, Rodriguez-R LM, Bosch R, Hedlund BP, Konstantinidis KT, Rossello-Mora R. Bustos-Caparros E, et al. ISME J. 2025 Jan 2;19(1):wraf165. doi: 10.1093/ismejo/wraf165. ISME J. 2025. PMID: 40757481 Free PMC article.
Haloquadratum walsbyi is generally the dominant species in hypersaline ecosystems at salt saturation conditions. ...Further, our results showed that genomovars were followed by their viral cohorts, who play a significant role in the global dominance of the four H. …
Haloquadratum walsbyi is generally the dominant species in hypersaline ecosystems at salt saturation conditions. ...Further, o …
Novel viruses of Haloquadratum walsbyi expand the known archaeal virosphere of hypersaline environments.
Villamor J, Ramos-Barbero MD, Moreno-Paz M, Villena-Alemany C, Martínez-García M, Parro V, Antón J, Santos F. Villamor J, et al. ISME J. 2025 Jan 2;19(1):wraf149. doi: 10.1093/ismejo/wraf149. ISME J. 2025. PMID: 40673824 Free PMC article.
This is particularly relevant for the extremely abundant "square" archaeon Haloquadratum walsbyi, for which isolated viruses have remained elusive despite the fact that this microbe governs the salt-saturated ponds of most solar salterns worldwide. ...Along with the …
This is particularly relevant for the extremely abundant "square" archaeon Haloquadratum walsbyi, for which isolated viruses h …
Haloquadratum walsbyi gen. nov., sp. nov., the square haloarchaeon of Walsby, isolated from saltern crystallizers in Australia and Spain.
Burns DG, Janssen PH, Itoh T, Kamekura M, Li Z, Jensen G, Rodríguez-Valera F, Bolhuis H, Dyall-Smith ML. Burns DG, et al. Int J Syst Evol Microbiol. 2007 Feb;57(Pt 2):387-392. doi: 10.1099/ijs.0.64690-0. Int J Syst Evol Microbiol. 2007. PMID: 17267984
The phenotypic characterization and phylogenetic data support the placement of isolates C23T and HBSQ001 in a novel species in a new genus within the Halobacteriaceae, for which we propose the name Haloquadratum walsbyi gen. nov., sp. nov. The type strain of Halo …
The phenotypic characterization and phylogenetic data support the placement of isolates C23T and HBSQ001 in a novel species in a new genus w …
67 results