ArticleBiochemistry2015
A dimeric chlorite dismutase exhibits O2-generating activity and acts as a chlorite antioxidant in Klebsiella pneumoniae MGH 78578.
Article in Biochemistry, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.
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Who cites it
22 citing papers in PubMed, 36 citations in OpenAlex.
- Role of Propionate Side Chain in Heme-Containing Metalloenzymes.ACS organic & inorganic Au · 2025Review
- Biochemical and structural characterization of chlorite dismutase enzyme from Pseudomonas aeruginosa.The FEBS journal · 2025Article
- Deciphering the role of the distal pocket in Staphylococcus aureus coproheme decarboxylase.Journal of inorganic biochemistry · 2025Article
- Widespread occurrence of dissolved oxygen anomalies, aerobic microbes, and oxygen-producing metabolic pathways in apparently anoxic environments.FEMS microbiology ecology · 2024Review
- Chlorine redox chemistry is widespread in microbiology.The ISME journal · 2023Article
- Parapatric speciation ofFrontiers in microbiology · 2023Article
- Roles of High-valent Hemes and pH Dependence in Halite Decomposition Catalyzed by Chlorite Dismutase fromACS catalysis · 2022Article
- Metalloprotein catalysis: structural and mechanistic insights into oxidoreductases from neutron protein crystallography.Acta crystallographica. Section D, Structural biology · 2021Review
- Arresting the Catalytic Arginine in Chlorite Dismutases: Impact on Heme Coordination, Thermal Stability, and Catalysis.Biochemistry · 2021Article
- Understanding molecular enzymology of porphyrin-binding α + β barrel proteins - One fold, multiple functions.Biochimica et biophysica acta. Proteins and proteomics · 2021Review
- Structure and reactivity of chlorite dismutase nitrosyls.Journal of inorganic biochemistry · 2020Article
- Identification of a parasitic symbiosis between respiratory metabolisms in the biogeochemical chlorine cycle.The ISME journal · 2020Article
- Oxygen Activation and Radical Transformations in Heme Proteins and Metalloporphyrins.Chemical reviews · 2018Review
- Distinguishing Active Site Characteristics of Chlorite Dismutases with Their Cyanide Complexes.Biochemistry · 2018Article
- Microbial Synthesis and Transformation of Inorganic and Organic Chlorine Compounds.Frontiers in microbiology · 2018Review
- Molecular Mechanism of Enzymatic Chlorite Detoxification: Insights from Structural and Kinetic Studies.ACS catalysis · 2017Article
- Active Sites of OBiochemistry · 2017Article
- Reactions of Ferrous Coproheme Decarboxylase (HemQ) with OBiochemistry · 2017Article
- Characterizing Isozymes of Chlorite Dismutase for Water Treatment.Frontiers in microbiology · 2017Article
- From chlorite dismutase towards HemQ - the role of the proximal H-bonding network in haeme binding.Bioscience reports · 2016Article
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Authors and funding
10 authors at 4 institutions in 2 countries.
Funding
Abstract
Chlorite dismutases (Clds) convert chlorite to O2 and Cl(-), stabilizing heme in the presence of strong oxidants and forming the O═O bond with high efficiency. The enzyme from the pathogen Klebsiella pneumoniae (KpCld) represents a subfamily of Clds that share most of their active site structure with efficient O2-producing Clds, even though they have a truncated monomeric structure, exist as a dimer rather than a pentamer, and come from Gram-negative bacteria without a known need to degrade chlorite. We hypothesized that KpCld, like others in its subfamily, should be able to make O2 and may serve an in vivo antioxidant function. Here, it is demonstrated that it degrades chlorite with limited turnovers relative to the respiratory Clds, in part because of the loss of hypochlorous acid from the active site and destruction of the heme. The observation of hypochlorous acid, the expected leaving group accompanying transfer of an oxygen atom to the ferric heme, is consistent with the more open, solvent-exposed heme environment predicted by spectroscopic measurements and inferred from the crystal structures of related proteins. KpCld is more susceptible to oxidative degradation under turnover conditions than the well-characterized Clds associated with perchlorate respiration. However, wild-type K. pneumoniae has a significant growth advantage in the presence of chlorate relative to a Δcld knockout strain, specifically under nitrate-respiring conditions. This suggests that a physiological function of KpCld may be detoxification of endogenously produced chlorite.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.