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CPO carboxypeptidase O

Coproporphyrinogen Oxidase
Top mentioned proteins: ACID, ferrochelatase, CAN, HAD, STEP
Papers on Coproporphyrinogen Oxidase
Improve efficacy of topical ALA-PDT by calcipotriol through up-regulation of coproporphyrinogen oxidase.
Hsu et al., Denver, United States. In Photodiagnosis Photodyn Ther, 2014
The effect of CAL on heme-related enzymes (CPOX, PPOX, and FECH) were examined in an in vitro model using human squamous cell carcinoma (SCC) cells (SCC4, SAS) using Western blots.
Calcitriol enhances 5-aminolevulinic acid-induced fluorescence and the effect of photodynamic therapy in human glioma.
Zhao et al., Harbin, China. In Acta Oncol, 2014
Furthermore, mechanistic studies documented that expression of the porphyrin synthesis enzymes coproporphyrinogen oxidase was increased by calcitriol at the mRNA level.
Methotrexate enhances 5-aminolevulinic acid-mediated photodynamic therapy-induced killing of human SCC4 cells by upregulation of coproporphyrinogen oxidase.
Hsu et al., T'ai-chung-shih, Taiwan. In J Formos Med Assoc, 2014
Western blot analyses were used to examine the MTX-mediated enhancement in the expressions of the heme production-related enzymes, coproporphyrinogen oxidase (CPOX), protoporphyrinogen oxidase (PPOX), and ferrochelatase, in the MTX-preconditioned SCC4 cells.
Seven Novel Mutations in Bulgarian Patients with Acute Hepatic Porphyrias (AHP).
Matsubara et al., Sofia, Bulgaria. In Jimd Rep, 2013
Acute intermittent porphyria (AIP), variegate porphyria (VP), and hereditary coproporphyria (HCP) are caused by mutations in the hydroxymethylbilane synthase (HMBS), protoporphyrinogen oxidase (PPOX), and coproporphyrinogen oxidase (CPOX) genes, respectively.
Comparison of protoporphyrin IX content and related gene expression in the tissues of chickens laying brown-shelled eggs.
Yang et al., Beijing, China. In Poult Sci, 2013
The results showed that expression of aminolevulinic acid synthase-1 (ALAS1) was higher in the liver of hens laying darker brown shelled eggs, whereas in the shell gland the expression levels of ALAS1, coproporphyrinogen oxidase (CPOX), ATP-binding cassette family members ABCB7 and ABCG2, and receptor for feline leukemia virus, subgroup C (FLVCR) were significantly higher in the hens laying darker brown shelled eggs.
The enzyme engineering of mutant homodimer and heterodimer of coproporphyinogen oxidase contributes to new insight into hereditary coproporphyria and harderoporphyria.
Taketani et al., Kyoto, Japan. In J Biochem, 2013
Hereditary coproporphyria (HCP) is an autosomal dominant-inherited disease of haem biosynthesis caused by partial deficiency of the enzyme coproporphyrinogen oxidase (CPOX).
Mechanism of differentiation-enhanced photodynamic therapy for cancer: upregulation of coproporphyrinogen oxidase by C/EBP transcription factors.
Maytin et al., Cleveland, United States. In Mol Cancer Ther, 2013
In subcutaneous A431 tumors in mice, pretreatment with Vit D induced the expression of C/EBPβ isoforms, and of coproporphyrinogen oxidase (CPO), a heme pathway enzyme responsible for the conversion of 5-aminolevulinic acid (ALA) into protoporphyrin IX (PpIX), the principal light-absorbing molecule during PDT.
Hereditary cataract of the Nakano mouse: Involvement of a hypomorphic mutation in the coproporphyrinogen oxidase gene.
Higuchi et al., Matsumoto, Japan. In Exp Eye Res, 2013
Herein, we report that cataracts in the BALB/c-nct/nct mouse are caused by a hypomorphic mutation in the coproporphyrin oxidase gene (Cpox), encoding the enzyme responsible for catalyzing oxidative decarboxylation of the heme precursor, coproporphyrinogen III, in the heme biosynthetic pathway.
Cofactor-independent oxidases and oxygenases.
Steiner et al., Münster, Germany. In Appl Microbiol Biotechnol, 2010
Among the cofactor-independent oxidases, urate oxidase, coproporphyrinogen oxidase, and formylglycine-generating enzyme are of mechanistic as well as medical interest.
Between a rock and a hard place: trace element nutrition in Chlamydomonas.
Terauchi et al., Los Angeles, United States. In Biochim Biophys Acta, 2006
Oxygen-dependent enzymes in the tetrapyrrole pathway (coproporphyrinogen oxidase and aerobic oxidative cyclase) are also increased in expression and activity by as much as 10-fold but the connection between copper nutrition and tetrapyrroles is not understood.
Terminal steps of haem biosynthesis.
Dailey, Athens, United States. In Biochem Soc Trans, 2002
The terminal three steps in haem biosynthesis are the oxidative decarboxylation of coproporphyrinogen III to protoporphyrinogen IX, followed by the six-electron oxidation of protoporphyrinogen to protoporphyrin IX, and finally the insertion of ferrous iron to form haem. Interestingly, Nature has evolved distinct enzymic machinery to deal with the antepenultimate (coproporphyrinogen oxidase) and penultimate (protoporphyrinogen oxidase) steps for aerobic compared with anaerobic organisms.
Molecular, immunological, enzymatic and biochemical studies of coproporphyrinogen oxidase deficiency in a family with hereditary coproporphyria.
Doss et al., Marburg an der Lahn, Germany. In Cell Mol Biol Incl Cyto Enzymol, 2002
Coproporphyrinogen oxidase activity was decreased to 35% in the patient (normal=138+/-21 pkat/g protein; x+/-s), whereas the activity of red cell uroporphyrinogen decarboxylase was normal.
Alcohol and porphyrin metabolism.
Gross et al., Marburg an der Lahn, Germany. In Alcohol Alcohol, 2000
Ethanol suppresses the activity of porphobilinogen synthase (synonym: delta-aminolevulinic acid dehydratase), uroporphyrinogen decarboxylase, coproporphyrinogen oxidase and ferrochelatase, whereas it induces the first and rate-limiting enzyme in the pathway, delta-aminolevulinic acid synthase and also porphobilinogen deaminase.
Decreased activity of hepatic uroporphyrinogen decarboxylase in sporadic porphyria cutanea tarda.
Tovey et al., In N Engl J Med, 1978
To investigate the role of uroporphyrinogen decarboxylase in the pathogenesis of the sporadic form of porphyria cutanea tarda, we measured this enzyme in liver, erythrocytes and cultured skin fibroblasts, and also measured coproporphyrinogen oxidase and the total iron concentration in liver.
The primary enzyme defect in hereditary coproporphyria.
Thomas et al., In Lancet, 1977
The activity of coproporphyrinogen oxidase (E.C. in cultured skin fibroblasts from three patients with hereditary coproporphyria (H.C.) was approximately half that in fibroblasts from normal subjects and patients with other types of porphyria.
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