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Statements

Subject Item
n2:RIV%2F60077344%3A_____%2F13%3A00422243%21RIV14-AV0-60077344
rdf:type
n13:Vysledek skos:Concept
dcterms:description
The canonical photosynthetic plastid genomes consist of a single circular-mapping chromosome that encodes a highly conserved protein core, involved in photosynthesis and ATP generation. Here, we demonstrate that the plastid genome of the photosynthetic relative of apicomplexans, Chromera velia, departs from this view in several unique ways. Core photosynthesis proteins PsaA and AtpB have been broken into two fragments, which we show are independently transcribed, oligoU-tailed, translated, and assembled into functional photosystem I and ATP synthase complexes. Genome-wide transcription profiles support expression of many other highly modified proteins, including several that contain extensions amounting to hundreds of amino acids in length. Canonical gene clusters and operons have been fragmented and reshuffled into novel putative transcriptional units. Massive genomic coverage by paired-end reads, coupled with pulsed-field gel electrophoresis and polymerase chain reaction, consistently indicate that the C. velia plastid genome is linear-mapping, a unique state among all plastids. Abundant intragenomic duplication probably mediated by recombination can explain protein splits, extensions, and genome linearization and is perhaps the key driving force behind the many features that defy the conventional ways of plastid genome architecture and function The canonical photosynthetic plastid genomes consist of a single circular-mapping chromosome that encodes a highly conserved protein core, involved in photosynthesis and ATP generation. Here, we demonstrate that the plastid genome of the photosynthetic relative of apicomplexans, Chromera velia, departs from this view in several unique ways. Core photosynthesis proteins PsaA and AtpB have been broken into two fragments, which we show are independently transcribed, oligoU-tailed, translated, and assembled into functional photosystem I and ATP synthase complexes. Genome-wide transcription profiles support expression of many other highly modified proteins, including several that contain extensions amounting to hundreds of amino acids in length. Canonical gene clusters and operons have been fragmented and reshuffled into novel putative transcriptional units. Massive genomic coverage by paired-end reads, coupled with pulsed-field gel electrophoresis and polymerase chain reaction, consistently indicate that the C. velia plastid genome is linear-mapping, a unique state among all plastids. Abundant intragenomic duplication probably mediated by recombination can explain protein splits, extensions, and genome linearization and is perhaps the key driving force behind the many features that defy the conventional ways of plastid genome architecture and function
dcterms:title
Split Photosystem Protein, Linear-Mapping Topology, and Growth of Structural Complexity in the Plastid Genome of Chromera velia Split Photosystem Protein, Linear-Mapping Topology, and Growth of Structural Complexity in the Plastid Genome of Chromera velia
skos:prefLabel
Split Photosystem Protein, Linear-Mapping Topology, and Growth of Structural Complexity in the Plastid Genome of Chromera velia Split Photosystem Protein, Linear-Mapping Topology, and Growth of Structural Complexity in the Plastid Genome of Chromera velia
skos:notation
RIV/60077344:_____/13:00422243!RIV14-AV0-60077344
n13:predkladatel
n14:ico%3A60077344
n3:aktivita
n9:P n9:I
n3:aktivity
I, P(ED2.1.00/03.0110), P(GAP506/12/1522), P(GBP501/12/G055)
n3:cisloPeriodika
11
n3:dodaniDat
n7:2014
n3:domaciTvurceVysledku
Lai, De Hua Flegontov, Pavel n17:1369490
n3:druhVysledku
n10:J
n3:duvernostUdaju
n12:S
n3:entitaPredkladatele
n16:predkladatel
n3:idSjednocenehoVysledku
107093
n3:idVysledku
RIV/60077344:_____/13:00422243
n3:jazykVysledku
n4:eng
n3:klicovaSlova
plastid genome evolution; Chromera velia; split protein
n3:klicoveSlovo
n6:split%20protein n6:plastid%20genome%20evolution n6:Chromera%20velia
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[D22CFCB7E1A5]
n3:nazevZdroje
Molecular Biology and Evolution
n3:obor
n11:CE
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
12
n3:projekt
n8:ED2.1.00%2F03.0110 n8:GAP506%2F12%2F1522 n8:GBP501%2F12%2FG055
n3:rokUplatneniVysledku
n7:2013
n3:svazekPeriodika
30
n3:tvurceVysledku
Komenda, Josef Janouškovec, J. Oborník, Miroslav Lukeš, Julius Ali, S. Prášil, Ondřej Pain, A. Sobotka, Roman Koník, P. Keeling, P. J. Flegontov, Pavel Lai, De Hua
n3:wos
000326745300006
s:issn
0737-4038
s:numberOfPages
16
n15:doi
10.1093/molbev/mst144