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Role of C-terminal domain in a manganese-catalase from Geobacillus thermopakistaniensis. J Biosci Bioeng 2022; 134:203-212. [PMID: 35811183 DOI: 10.1016/j.jbiosc.2022.06.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 06/03/2022] [Accepted: 06/17/2022] [Indexed: 11/21/2022]
Abstract
Catalases catalyze the decomposition of hydrogen peroxide into water and oxygen. We have characterized two manganese-catalases from Geobacillus thermopakistaniensis, CatGt and Cat-IIGt, which exhibited significant variation in their sequence, structure and properties. There was only 23% sequence identity between the two. The striking structural difference was the presence of an extended C-terminal domain in CatGt. Molecular modelling and docking studies revealed that deletion of the C-terminal domain removes non-specific binding, which results in increased substrate affinity. To verify experimentally, a C-terminal truncated version of CatGt, named as CatGt-ΔC, was produced in Escherichia coli and effects of deletion were analyzed. There was no significant difference in optimal pH, optimal temperature and substrate specificity of CatGt and CatGt-ΔC. However, Km value was reduced from 259 to 157 mM and CatGt-ΔC exhibited ∼1.5-fold higher catalytic efficiency as compared to CatGt. Furthermore, removal of the C-terminal domain converted the tetrameric nature to monomeric, and reduced the thermostability of the truncated protein. These results demonstrate that C-terminal domain of CatGt might have little role in maintaining enzyme function but provides additional structural stability to the protein, which is a desired property for industrial applications.
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Looking into a highly thermostable and efficient recombinant manganese-catalase from Geobacillusthermopakistaniensis. J Biosci Bioeng 2021; 133:25-32. [PMID: 34642121 DOI: 10.1016/j.jbiosc.2021.09.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 09/09/2021] [Accepted: 09/17/2021] [Indexed: 01/17/2023]
Abstract
Catalases, heme or non-heme, are catalysts that decompose hydrogen peroxide. Among them, non-heme or manganese-catalases have been studied from limited organisms. We report here heterologous production of a manganese-catalase, Cat-IIGt, previously annotated as a hypothetical protein, from a thermophilic bacterium Geobacillus thermopakistaniensis. Recombinant Cat-IIGt, produced as inactive inclusion bodies in Escherichia coli, was solubilized and refolded into a soluble and highly active form. Sequence homology, absorption spectra, resistance to sodium azide inhibition and activation by Mn2+ indicated that it was a manganese-catalase. Metal analysis revealed the presence of ∼2 Mn2+ and ∼2 Ca2+ per subunit of Cat-IIGt. Recombinant Cat-IIGt exhibited highest activity at pH 10.0 and 70°C. The enzyme was highly active with a specific activity of 40,529 μmol min-1 mg-1. The apparent Km and kcat values were 75 mM and 1.5 × 104 s-1 subunit-1, respectively. Recombinant Cat-IIGt was highly thermostable with a half-life of 30 min at 100°C. The structural attributes of Cat-IIGt, including the metal and substrate binding residues, were predicted by homology modeling and molecular docking studies. High activity and thermostability and alkaline nature make Cat-IIGt a potential candidate for textile and paper processing industries.
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Takio N, Yadav M, Yadav HS. Catalase-mediated remediation of environmental pollutants and potential application – a review. BIOCATAL BIOTRANSFOR 2021. [DOI: 10.1080/10242422.2021.1932838] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Nene Takio
- Department of Chemistry, North Eastern Regional Institute of Science and Technology, Itanagar, India
| | - Meera Yadav
- Department of Chemistry, North Eastern Regional Institute of Science and Technology, Itanagar, India
| | - Hardeo Singh Yadav
- Department of Chemistry, North Eastern Regional Institute of Science and Technology, Itanagar, India
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Shaeer A, Aslam M, Rashid N. Structural and functional analyses of a novel manganese-catalase from Bacillus subtilis R5. Int J Biol Macromol 2021; 180:222-233. [PMID: 33737179 DOI: 10.1016/j.ijbiomac.2021.03.074] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 03/13/2021] [Accepted: 03/13/2021] [Indexed: 12/24/2022]
Abstract
Catalases catalyze the decomposition of hydrogen peroxide into water and oxygen. Limited reports are available on characterization of manganese-catalases. We describe here molecular cloning and expression in Escherichia coli of a putative manganese-catalase gene from mesophilic bacterium, Bacillus subtilis R5. The gene product, CatBsu, produced as a soluble protein, was purified to apparent homogeneity and biochemically characterized. The absorption spectra and nonsignificant inhibition by sodium azide indicated that it is a manganese-catalase. The protein was in homohexameric form in solution, with a subunit molecular weight of 30 kDa, containing ~2 Mn2+ and ~1 Ca2+ per subunit. CatBsu showed highest activity at pH 8.0 and 55 °C. It was found to be highly active with a specific activity of 25,290 μmol min-1 mg-1 and apparent Km and kcat values of 98 mM and 1.27 × 104 s-1 subunit-1, respectively. Although from a mesophilic source, it exhibited a half-life of 2 h at 80 °C. Furthermore, the active site and metal binding residues in CatBsu were predicted by homology modelling and molecular docking. To the best of our knowledge, this is the first characterization of a manganese-catalase from genus Bacillus.
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Affiliation(s)
- Abeera Shaeer
- School of Biological Sciences, University of the Punjab, Quaid-e-Azam Campus, Lahore 54590, Pakistan
| | - Mehwish Aslam
- School of Biological Sciences, University of the Punjab, Quaid-e-Azam Campus, Lahore 54590, Pakistan
| | - Naeem Rashid
- School of Biological Sciences, University of the Punjab, Quaid-e-Azam Campus, Lahore 54590, Pakistan.
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Ballal A, Chakravarty D, Bihani SC, Banerjee M. Gazing into the remarkable world of non-heme catalases through the window of the cyanobacterial Mn-catalase 'KatB'. Free Radic Biol Med 2020; 160:480-487. [PMID: 32858159 DOI: 10.1016/j.freeradbiomed.2020.08.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 08/09/2020] [Accepted: 08/18/2020] [Indexed: 10/23/2022]
Abstract
Catalases, enzymes that decompose H2O2, are broadly categorized as heme catalases or non-heme catalases. The non-heme catalases are also known as Mn-catalases as they have Mn atoms in their active sites. However, unlike the well characterized heme-catalases, the study of Mn-catalases has gained importance only in the last few years. The filamentous, heterocystous, N2-fixing cyanobacterium Anabaena PCC 7120, shows the presence of two Mn-catalases, KatA and KatB, but lacks heme catalases. Of the two Mn-catalases, KatB, which is induced by salt/desiccation, plays a major role in overcoming salinity/oxidative stress. In this mini review, we have summarized the recent advances made in the field of Mn-catalases, particularly KatB, and have interpreted these results in the larger context of stress physiology. These aspects bring to the fore the distinctive biochemical/structural properties of Mn-catalases and furthermore highlight the in vivo importance of these enzymes in adapting to oxidative stresses.
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Affiliation(s)
- Anand Ballal
- Molecular Biology Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India; Homi Bhabha National Institute, Anushaktinagar, Mumbai, 400094, India.
| | - Dhiman Chakravarty
- Molecular Biology Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India; Homi Bhabha National Institute, Anushaktinagar, Mumbai, 400094, India
| | - Subhash C Bihani
- Radiation Biology and Health Sciences Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India
| | - Manisha Banerjee
- Molecular Biology Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India; Homi Bhabha National Institute, Anushaktinagar, Mumbai, 400094, India
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Lisuma JB, Zuberi Z, Ndakidemi PA, Mbega ER. Linking rhizosphere bacterial diversity and soil fertility in tobacco plants under different soil types and cropping pattern in Tanzania: A pilot study. Heliyon 2020; 6:e04278. [PMID: 32671244 PMCID: PMC7347649 DOI: 10.1016/j.heliyon.2020.e04278] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 03/02/2020] [Accepted: 06/18/2020] [Indexed: 12/14/2022] Open
Abstract
Tobacco (Nicotiana tabacum L.), one of the major crop plants in Tanzania, cropping affects the level of soil fertility, but the reason has not been known. Plant rhizosphere plays an important role in affecting soil fertility through changing microbial composition. We planned a pilot study to understand the changes in microbial composition and soil nutrients in the rhizosphere soils of tobacco in three agro-ecological zone, namely Sikonge, Tabora and Urambo in Tanzania. This study assessed bacteriota composition using 16S rRNA sequencing and soil fertility in the rhizosphere of tobacco plants. The results showed that bacterial diversity in tobacco rhizosphere soils belonged to Proteobacteria phyla, associated significantly (p < 0.05) with solubilization of insoluble P, K and S. The solubilization of P, K and S in soils facilitates the availability of these nutrients to the tobacco plants (a heavy feeder crop) allows low levels of these nutrients in the soils for the subsequent crop. The Proteobacteria phyla also associated with an increase in soil N content through fixation. Therefore, bacteria diversity in tobacco rhizosphere influence solubilities of macronutrients (P, K, S) and quickly up taken by the tobacco plant and reduces their levels in soils, some bacteria involved in fixing N and increases total N in the soil.
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Affiliation(s)
- Jacob Bulenga Lisuma
- Department of Sustainable Agriculture and Biodiversity Ecosystems Management, School of Life Sciences and Bio-engineering, The Nelson Mandela African Institution of Science and Technology (NM-AIST), P.O Box 447, Arusha, Tanzania.,Department of Research, Tobacco Research Institute of Tanzania (TORITA), P.O Box 431, Tabora, Tanzania
| | - Zavuga Zuberi
- Department of Global Health and Biomedical Sciences, School of Life Sciences and Bio-engineering, The Nelson Mandela African Institution of Science and Technology (NM-AIST), P.O Box 447, Arusha, Tanzania.,Department of Science and Laboratory Technology, Dar es Salaam Institute of Technology (DIT), P.O Box 2958, Dar es Salaam, Tanzania
| | - Patrick Alois Ndakidemi
- Department of Sustainable Agriculture and Biodiversity Ecosystems Management, School of Life Sciences and Bio-engineering, The Nelson Mandela African Institution of Science and Technology (NM-AIST), P.O Box 447, Arusha, Tanzania
| | - Ernest Rashid Mbega
- Department of Sustainable Agriculture and Biodiversity Ecosystems Management, School of Life Sciences and Bio-engineering, The Nelson Mandela African Institution of Science and Technology (NM-AIST), P.O Box 447, Arusha, Tanzania
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Shaeer A, Aslam M, Rashid N. A highly stable manganese catalase from Geobacillus thermopakistaniensis: molecular cloning and characterization. Extremophiles 2019; 23:707-718. [DOI: 10.1007/s00792-019-01124-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Accepted: 07/26/2019] [Indexed: 01/08/2023]
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Theoretical study of the mechanism of the manganese catalase KatB. J Biol Inorg Chem 2018; 24:103-115. [DOI: 10.1007/s00775-018-1631-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Accepted: 11/14/2018] [Indexed: 11/30/2022]
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Chen N, Teng XL, Xiao XG. Subcellular Localization of a Plant Catalase-Phenol Oxidase, AcCATPO, from Amaranthus and Identification of a Non-canonical Peroxisome Targeting Signal. FRONTIERS IN PLANT SCIENCE 2017; 8:1345. [PMID: 28824680 PMCID: PMC5539789 DOI: 10.3389/fpls.2017.01345] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Accepted: 07/18/2017] [Indexed: 05/03/2023]
Abstract
AcCATPO is a plant catalase-phenol oxidase recently identified from red amaranth. Its physiological function remains unexplored. As the starting step of functional analysis, here we report its subcellular localization and a non-canonical targeting signal. Commonly used bioinformatics programs predicted a peroxisomal localization for AcCATPO, but failed in identification of canonical peroxisomal targeting signals (PTS). The C-terminal GFP tagging led the fusion protein AcCATPO-GFP to the cytosol and the nucleus, but N-terminal tagging directed the GFP-AcCATPO to peroxisomes and nuclei, in transgenic tobacco. Deleting the tripeptide (PTM) at the extreme C-terminus almost ruled out the peroxisomal localization of GFP-AcCATPOΔ3, and removing the C-terminal decapeptide completely excluded peroxisomes as the residence of GFP-AcCATPOΔ10. Furthermore, this decapeptide as a targeting signal could import GFP-10aa to the peroxisome exclusively. Taken together, these results demonstrate that AcCATPO is localized to the peroxisome and the nucleus, and its peroxisomal localization is attributed to a non-canonical PTS1, the C-terminal decapeptide which contains an internal SRL motif and a conserved tripeptide P-S/T-I/M at the extreme of C-terminus. This work may further the study as to the physiological function of AcCATPO, especially clarify its involvement in betalain biosynthesis, and provide a clue to elucidate more non-canonic PTS.
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