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Elucidation of vitamin B metabolism in the human malaria parasite Plasmodium falciparum and their validation as a target for chemotherapy


Pyridoxal phosphate (PLP) and thiamine pyrophosphate (TPP) are cofactors of essential enzymes that are ubiquitous in all organisms. Humans depend on the uptake of vitamins via their diet, whereas fungi, bacteria and plants synthesis these cofactors de novo, which was recently' also reported for the malaria parasite Plasmodium falciparum. Additionally to the de novo syntheses, salvage pathways for B6 and B1 have been identified in P. falciparum, which raises questions about the relevance of this dual vitamin provision and further about the possible role of B6 in quenching oxidative stress as reported for plants. However prior to uptake PLP and TPP need to be dephosphorylated which is proposed to be carried out by a secreted phosphatase. Further vitamins are not solely present within the cytosol, they need to be transported into organelles of the parasite, such as the mitochondrion and the apicoplast. Transportation processes of vitamin B1 will be analysed by keto-acid dehydrogenase complexes and organelle specific vitamin B6 acquisition will be investigated via the cysteine desulphurylase NifS and SufS required for iron-sulphur-cluster formation. Both proteins need an acceptor protein, which is proposed to be dually trafficked into both organelles. In an additional project the novel secreted proteins to the surface of the infected erythrocyte will be analysed for their necessity as well as for their trafficking by applying the SELEX technology, which will be carried out in collaboration with researchers at USP. (AU)

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Publicações científicas (9)
(Referências obtidas automaticamente do Web of Science e do SciELO, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores)
KRONENBERGER, THALES; SCHETTERT, ISOLMAR; WRENGER, CARSTEN. Targeting the vitamin biosynthesis pathways for the treatment of malaria. Future Medicinal Chemistry, v. 5, n. 7, p. 769-779, . (10/20647-0, 09/54325-2, 11/13706-3)
PEREIRA, C. A.; SAYE, M.; WRENGER, C.; MIRANDA, M. R.. Metabolite Transporters in Trypanosomatid Parasites: Promising Therapeutic Targets But... How to Deal with Them?. Current Medicinal Chemistry, v. 21, n. 15, p. 1707-1712, . (10/20647-0, 09/54325-2)
DREBES, JULIA; KUENZ, MADELEINE; PEREIRA, CLAUDIO A.; BETZEL, CHRISTIAN; WRENGER, CARSTEN. MRSA Infections: From Classical Treatment to Suicide Drugs. Current Medicinal Chemistry, v. 21, n. 15, p. 1809-1819, . (09/54325-2, 13/10288-1)
KRONENBERGER, THALES; LINDNER, JASMIN; MEISSNER, KAMILA A.; ZIMBRES, FLAVIA M.; CORONADO, MONIKA A.; SAUER, FRANK M.; SCHETTERT, ISOLMAR; WRENGER, CARSTEN. Vitamin B6-Dependent Enzymes in the Human Malaria Parasite Plasmodium falciparum: A Druggable Target?. BIOMED RESEARCH INTERNATIONAL, . (09/54325-2, 12/12807-3, 11/19703-6, 10/20647-0, 12/12790-3, 11/13706-3, 13/10288-1)
KRONENBERGER, THALES; LUNEV, SERGEY; WRENGER, CARSTEN; GROVES, MATTHEW R.. Purification, crystallization and preliminary X-ray diffraction analysis of pyridoxal kinase from Plasmodium falciparum (PfPdxK). ACTA CRYSTALLOGRAPHICA SECTION F-STRUCTURAL BIOLOGY COMMUNICATIONS, v. 70, n. 11, p. 1550-1555, . (09/54325-2, 11/13706-3, 13/10288-1)
BEGUM, AFSHAN; DREBES, JULIA; KIKHNEY, ALEXEY; MUELLER, INGRID B.; PERBANDT, MARKUS; SVERGUN, DMITRI; WRENGER, CARSTEN; BETZEL, CHRISTIAN. Staphylococcus aureus thiaminase II: oligomerization warrants proteolytic protection against serine proteases. ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY, v. 69, n. 12, p. 2320-2329, . (09/54325-2)
NDJONKA, DIEUDONNE; RAPADO, LUDMILA NAKAMURA; SILBER, ARIEL M.; LIEBAU, EVA; WRENGER, CARSTEN. Natural Products as a Source for Treating Neglected Parasitic Diseases. INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES, v. 14, n. 2, p. 3395-3439, . (09/54325-2, 11/50631-1)
ZIMBRES, FLAVIA M.; TARNOK, ATTILA; ULRICH, HENNING; WRENGER, CARSTEN. Aptamers: Novel Molecules as Diagnostic Markers in Bacterial and Viral Infections?. BIOMED RESEARCH INTERNATIONAL, . (10/20647-0, 09/54325-2, 11/19703-6, 12/50393-6)
BOSCH, SORAYA S.; KRONENBERGER, THALES; MEISSNER, KAMILA A.; ZIMBRES, FLAVIA M.; STEGEHAKE, DIRK; IZUI, NATALIA M.; SCHETTERT, ISOLMAR; LIEBAU, EVA; WRENGER, CARSTEN. Oxidative Stress Control by Apicomplexan Parasites. BIOMED RESEARCH INTERNATIONAL, . (09/54325-2, 12/12807-3, 11/19703-6, 10/20647-0, 13/17577-9, 11/13706-3, 13/10288-1)

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