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Statements

Subject Item
n2:RIV%2F60077409%3A_____%2F05%3A00025875%21RIV06-AV0-60077409
rdf:type
skos:Concept n16:Vysledek
dcterms:description
We describe the mitochondrial genome and the mitochondrial ultrastructure of Diplonema papillatum - a member of diplonemid flagellates, which are the sister group of kinetoplastids. DNA is evenly distributed throughout the mitochondrion rather than compacted into a kinetoplast body. Molecular studies distinguish numerous small mitochondrial chromosomes that fall into two size classes, 6 and 7 kbp. In vivo, these molecules are of monomeric circular topology and relaxed conformation. Remarkably, the cox1 gene (and probably other mitochondrial genes) is fragmented, with separate gene pieces encoded on different chromosomes. Generation of the contiguous cox1 mRNA requires trans-splicing, the precise mechanism of which remains to be determined. Taken together, the mitochondrial gene/genome structure of Diplonema is not only different from that of kinetoplastids but unique among eukaryotes as a whole. We describe the mitochondrial genome and the mitochondrial ultrastructure of Diplonema papillatum - a member of diplonemid flagellates, which are the sister group of kinetoplastids. DNA is evenly distributed throughout the mitochondrion rather than compacted into a kinetoplast body. Molecular studies distinguish numerous small mitochondrial chromosomes that fall into two size classes, 6 and 7 kbp. In vivo, these molecules are of monomeric circular topology and relaxed conformation. Remarkably, the cox1 gene (and probably other mitochondrial genes) is fragmented, with separate gene pieces encoded on different chromosomes. Generation of the contiguous cox1 mRNA requires trans-splicing, the precise mechanism of which remains to be determined. Taken together, the mitochondrial gene/genome structure of Diplonema is not only different from that of kinetoplastids but unique among eukaryotes as a whole. Popsali jsme mitochondriální genom a ultrastrukturu u Diplonema papillatum, příslušníka diplonemích bičíkovců, kteří jsou sesterskou skupinou kinetoplastid. Fluorescenční a elektronová mikroskopie prokázala přítomnost jediné mitochondrie v buňce a ultrastrukturu atypickou pro Euglenozoa. Navíc je DNA rovnoměrně v organele rozptýlená a není kompaktně sbalené v kinetoplastu. Molekulární analýzy prokázaly mnohočetné malé mitochondriální chromosomy příslušející ke dvěma třídám o velikosti 6 a 7 kbp. In vivo mají tyto molekuly monomerní kruhovou topologii a jsou relaxované. Je pozoruhodné, že gen pro cox1 (a pravděpodobně i další geny) jsou fragmentované s tím, že jednotlivé kousky jsou uložené na různých chromosomech. Tvorba souvislé mRNA tudíž vyžaduje trans-splicing, jehož mechanismus zatím není znám.
dcterms:title
Unique mitochondrial genome structure in diplonemids, the sister group of kinetoplastids Jedinečná struktura mitochondriálního genomu u diplonemid, sesterské skupiny kinetoplastid Unique mitochondrial genome structure in diplonemids, the sister group of kinetoplastids
skos:prefLabel
Unique mitochondrial genome structure in diplonemids, the sister group of kinetoplastids Unique mitochondrial genome structure in diplonemids, the sister group of kinetoplastids Jedinečná struktura mitochondriálního genomu u diplonemid, sesterské skupiny kinetoplastid
skos:notation
RIV/60077409:_____/05:00025875!RIV06-AV0-60077409
n3:strany
1137;1146
n3:aktivita
n8:P n8:Z
n3:aktivity
P(IAA5022302), Z(AV0Z60220518), Z(MSM6007665801)
n3:cisloPeriodika
6
n3:dodaniDat
n14:2006
n3:domaciTvurceVysledku
n6:1369490
n3:druhVysledku
n4:J
n3:duvernostUdaju
n13:S
n3:entitaPredkladatele
n12:predkladatel
n3:idSjednocenehoVysledku
547852
n3:idVysledku
RIV/60077409:_____/05:00025875
n3:jazykVysledku
n18:eng
n3:klicovaSlova
Diplonema; kinetoplast; trans-splicing
n3:klicoveSlovo
n5:Diplonema n5:trans-splicing n5:kinetoplast
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[AE952D0BB5A9]
n3:nazevZdroje
Eukaryotic Cell
n3:obor
n17:EB
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
3
n3:projekt
n15:IAA5022302
n3:rokUplatneniVysledku
n14:2005
n3:svazekPeriodika
4
n3:tvurceVysledku
Marande, W. Burger, G. Lukeš, Julius
n3:zamer
n7:MSM6007665801 n7:AV0Z60220518
s:issn
1535-9778
s:numberOfPages
10