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identification of an l-rhamnose synthetic pathway in two nucleocytoplasmic large dna viruses.nucleocytoplasmic large dna viruses (ncldvs) are characterized by large genomes that often encode proteins not commonly found in viruses. two species in this group are acanthocystis turfacea chlorella virus 1 (atcv-1) (family phycodnaviridae, genus chlorovirus) and acanthamoeba polyphaga mimivirus (family mimiviridae), commonly known as mimivirus. atcv-1 and other chlorovirus members encode enzymes involved in the synthesis and glycosylation of their structural proteins. in this study, we identi ...201020538863
chlorella virus atcv-1 encodes a functional potassium channel of 82 amino acids.chlorella virus pbcv-1 (paramecium bursaria chlorella virus-1) encodes the smallest protein (94 amino acids, named kcv) previously known to form a functional k+ channel in heterologous systems. in this paper, we characterize another chlorella virus encoded k+ channel protein (82 amino acids, named atcv-1 kcv) that forms a functional channel in xenopus oocytes and rescues saccharomyces cerevisiae mutants that lack endogenous k+ uptake systems. compared with the larger pbcv-1 kcv, atcv-1 kcv lacks ...200919267691
differential role of nadp+ and nadph in the activity and structure of gdp-d-mannose 4,6-dehydratase from two chlorella viruses.gdp-d-mannose 4,6-dehydratase (gmd) is a key enzyme involved in the synthesis of 6-deoxyhexoses in prokaryotes and eukaryotes. paramecium bursaria chlorella virus-1 (pbcv-1) encodes a functional gmd, which is unique among characterized gmds because it also has a strong stereospecific nadph-dependent reductase activity leading to gdp-d-rhamnose formation (tonetti, m., zanardi, d., gurnon, j., fruscione, f., armirotti, a., damonte, g., sturla, l., de flora, a., and van etten, j.l. (2003) j. biol. ...200817974560
sequence and annotation of the 288-kb atcv-1 virus that infects an endosymbiotic chlorella strain of the heliozoon acanthocystis turfacea.acanthocystis turfacea chlorella virus (atcv-1), a prospective member of the family phycodnaviridae, genus chlorovirus, infects a unicellular, eukaryotic, chlorella-like green alga, chlorella sag 3.83, that is a symbiont in the heliozoon a. turfacea. the 288,047-bp atcv-1 genome is the first virus to be sequenced that infects chlorella sag 3.83. atcv-1 contains 329 putative protein-encoding and 11 trna-encoding genes. the protein-encoding genes are almost evenly distributed on both strands and i ...200717276475
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