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Essig YJ, Leszczyszyn OI, Almutairi N, Harrison-Smith A, Blease A, Zeitoun-Ghandour S, Webb SM, Blindauer CA, Stürzenbaum SR. Juggling cadmium detoxification and zinc homeostasis: A division of labour between the two C. elegans metallothioneins. Chemosphere 2024; 350:141021. [PMID: 38151062 DOI: 10.1016/j.chemosphere.2023.141021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 12/18/2023] [Accepted: 12/20/2023] [Indexed: 12/29/2023]
Abstract
The chemical properties of toxic cadmium and essential zinc are very similar, and organisms require intricate mechanisms that drive selective handling of metals. Previously regarded as unspecific "metal sponges", metallothioneins (MTLs) are emerging as metal selectivity filters. By utilizing C. elegans mtl-1 and mtl-2 knockout strains, metal accumulation in single worms, single copy fluorescent-tagged transgenes, isoform specific qPCR and lifespan studies it was possible to demonstrate that the handling of cadmium and zinc by the two C. elegans metallothioneins differs fundamentally: the MTL-2 protein can handle both zinc and cadmium, but when it becomes unavailable, either via a knockout or by elevated cadmium exposure, MTL-1 takes over zinc handling, leaving MTL-2 to sequester cadmium. This division of labour is reflected in the folding behaviour of the proteins: MTL-1 folded well in presence of zinc but not cadmium, the reverse was the case for MTL-2. These differences are in part mediated by a zinc-specific mononuclear His3Cys site in the C-terminal insertion of MTL-1; its removal affected the entire C-terminal domain and may shift its metal selectivity towards zinc. Overall, we uncover how metallothionein isoform-specific responses and protein properties allow C. elegans to differentiate between toxic cadmium and essential zinc.
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Affiliation(s)
- Yona J Essig
- Analytical, Environmental and Forensic Sciences Department, King's College London, London, UK
| | - Oksana I Leszczyszyn
- Analytical, Environmental and Forensic Sciences Department, King's College London, London, UK
| | - Norah Almutairi
- Analytical, Environmental and Forensic Sciences Department, King's College London, London, UK
| | | | - Alix Blease
- Analytical, Environmental and Forensic Sciences Department, King's College London, London, UK
| | | | - Sam M Webb
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA, 94025, USA
| | | | - Stephen R Stürzenbaum
- Analytical, Environmental and Forensic Sciences Department, King's College London, London, UK.
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Portero V, Podliesna S, Nicol T, Casini S, Marchal GA, Blease A, Potter P, Bezzina CR, Remme CA. P472Pro-arrhythmic features of a novel mouse model of sudden death due to abnormal branched chain amino acid (BCAA) metabolism. Cardiovasc Res 2018. [DOI: 10.1093/cvr/cvy060.330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- V Portero
- Academic Medical Center of Amsterdam, experimental cardiology department, Amsterdam, Netherlands
| | - S Podliesna
- Academic Medical Center of Amsterdam, experimental cardiology department, Amsterdam, Netherlands
| | - T Nicol
- Medical Research Council of Oxford, MRC Harwell, Oxford, United Kingdom
| | - S Casini
- Academic Medical Center of Amsterdam, experimental cardiology department, Amsterdam, Netherlands
| | - G A Marchal
- Academic Medical Center of Amsterdam, experimental cardiology department, Amsterdam, Netherlands
| | - A Blease
- Medical Research Council of Oxford, MRC Harwell, Oxford, United Kingdom
| | - P Potter
- Academic Medical Center of Amsterdam, experimental cardiology department, Amsterdam, Netherlands
| | - C R Bezzina
- Academic Medical Center of Amsterdam, experimental cardiology department, Amsterdam, Netherlands
| | - C A Remme
- Academic Medical Center of Amsterdam, experimental cardiology department, Amsterdam, Netherlands
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Jackson I, Starbuck B, McKie L, Banks G, Blease A, Simon M, Wisby L, Cross S, Nolan P, Brown S, Potter P. Eye diseases identified in the ENU-Ageing Screen. Acta Ophthalmol 2015. [DOI: 10.1111/j.1755-3768.2015.0162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- I. Jackson
- MRC Human Genetics Unit; University of Edinburgh; Edinburgh United Kingdom
| | - B. Starbuck
- MRC Mammalian Genetics Unit; MRC Harwell; Harwell United Kingdom
| | - L. McKie
- MRC Human Genetics Unit; University of Edinburgh; Edinburgh United Kingdom
| | - G. Banks
- MRC Mammalian Genetics Unit; MRC Harwell; Harwell United Kingdom
| | - A. Blease
- MRC Mammalian Genetics Unit; MRC Harwell; Harwell United Kingdom
| | - M. Simon
- MRC Mammalian Genetics Unit; MRC Harwell; Harwell United Kingdom
| | - L. Wisby
- MRC Mammalian Genetics Unit; MRC Harwell; Harwell United Kingdom
| | - S. Cross
- MRC Human Genetics Unit; University of Edinburgh; Edinburgh United Kingdom
| | - P. Nolan
- MRC Mammalian Genetics Unit; MRC Harwell; Harwell United Kingdom
| | - S. Brown
- MRC Mammalian Genetics Unit; MRC Harwell; Harwell United Kingdom
| | - P. Potter
- MRC Mammalian Genetics Unit; MRC Harwell; Harwell United Kingdom
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