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In Paramecium, cAMP formation is stimulated by a potassium conductance, which is an intrinsic property of the adenylyl cyclase. We cloned a full-length cDNA and several gDNA fragments from Paramecium and Tetrahymena coding for adenylyl cyclases with a novel domain composition. A putative N-terminal ion channel domain contains a canonical S4 voltage-sensor and a canonical potassium pore-loop located C-terminally after the last transmembrane span on the cytoplasmic side. The adenylyl cyclase catalyst is C-terminally located. DNA microinjection of a green fluorescent protein (GFP)-tagged construct into the macronucleus of Paramecium resulted in ciliary localization of the expressed protein. An identical gene coding for an ion-channel adenylyl cyclase was cloned from the malaria parasite Plasmodium falciparum. Expression of the catalytic domain of the latter in Sf9 cells yielded an active homodimeric adenylyl cyclase. The occurrence of this highly unique subtype of adenylyl cyclase appears to be restricted to ciliates and apicomplexa.
Pubmed ID: 14607282 RIS Download
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Non profit research organization for genome sequences to advance understanding of biology of humans and pathogens in order to improve human health globally. Provides data which can be translated for diagnostics, treatments or therapies including over 100 finished genomes, which can be downloaded. Data are publicly available on limited basis, and provided more extensively upon request.
View all literature mentionsFunctional genomic database for malaria parasites. Database for Plasmodium spp. Provides resource for data analysis and visualization in gene-by-gene or genome-wide scale. PlasmoDB 5.5 contains annotated genomes, evidence of transcription, proteomics evidence, protein function evidence, population biology and evolution data. Data can be queried by selecting from query grid or drop down menus. Results can be combined with each other on query history page. Search results can be downloaded with associated functional data and registered users can store their query history for future retrieval or analysis.Key community database for malaria researchers, intersecting many types of laboratory and computational data, aggregated by gene.
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