Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UNIPROT:P04040 (Catalase)
 3,577 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

1. Superoxide dismutase activity was present in the heterocysts and vegetative cells of Anabaena cylindrica, but was always lower in the heterocysts. 2. No qualitative differences were found in the superoxide dismutase from the two cellular types. 3. Catalase activity was also present in both cellular types. 4. Most of the NADP reductase activity, as assayed with menadione or ferredoxin as electron acceptor, was localized within the heterocysts. 5. Studies on H2 consumption showed that most of the hydrogenase activity was associated with the heterocysts. 6. The results are discussed in terms of the postulate that superoxide dismutase and catalase are involved in the protection of the proton-donating systems participating in N2 fixation and H2 metabolism of heterocysts.
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PMID:Superoxide dismutase and catalase in the protection of the proton-donating systems of nitrogen fixation in the blue-green alga Anabaena cylindrica. 10 Dec 10

Plant geranylgeranyl hydrogenase (CHL P) reduces free geranylgeranyl diphosphate to phytil diphosphate, which provides the side chain to chlorophylls, tocopherols, and plastoquinones. In peach, the single copy gene (PpCHL P) encodes a deduced product of 51.68 kDa, which harbours a transit peptide for cytoplasm-to-chloroplast transport and a nicotinamide binding domain. The PpCHL P message was abundant in chlorophyll-containing tissues and flower organs, but barely detected in the roots and mesocarp of ripening fruits, suggesting that transcription was related to plastid types and maturation. The message was not revealed in shoot apical meristems, but spread thoroughly in leaf cells during the early stages and was located mainly in the palisade of mature leaves, which exhibited higher transcript levels than young ones. Hence, the transcription of PpCHL P was likely to be regulated during leaf development. Gene expression was monitored in leaves responding to natural dark, cold, wounding, stress by imposed darkening, and during the curl disease. Transcription was stimulated by light, but repressed by dark and cold stress. In darkened leaves, the PpCHL P message was augmented concomitantly with that of CATALASE. In wounded leaves, the message decreased, but recovered rapidly, whereas in curled leaves, a reduction in gene expression was related to leaf damage intensity. However, transcript signals increased locally both in cells mechanically wounded by a needle and in those naturally injured by the pathogenic fungus Taphrina deformans. These data suggest that PpCHL P expression was regulated by photosynthetic activity and was possibly involved in the defence response.
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PMID:The gene geranylgeranyl reductase of peach (Prunus persica [L.] Batsch) is regulated during leaf development and responds differentially to distinct stress factors. 1528 45