In vivo architecture of the telomerase RNA catalytic core in Trypanosoma brucei.
In vivo architecture of the telomerase RNA catalytic core in Trypanosoma brucei.
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布氏锥虫端粒酶RNA催化核心的体内结构。
DOI:
10.1093/nar/gkab1042
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发表时间:
2021-12-02
影响因子:
14.9
通讯作者:
Chakrabarti K
中科院分区:
文献类型:
--
作者:
Dey A;Monroy-Eklund A;Klotz K;Saha A;Davis J;Li B;Laederach A;Chakrabarti K
Telomerase is a unique ribonucleoprotein (RNP) reverse transcriptase that utilizes its cognate RNA molecule as a template for telomere DNA repeat synthesis. Telomerase contains the reverse transcriptase protein, TERT and the template RNA, TR, as its core components. The 5’-half of TR forms a highly conserved catalytic core comprising of the template region and adjacent domains necessary for telomere synthesis. However, how telomerase RNA folding takes place in vivo has not been fully understood due to low abundance of the native RNP. Here, using unicellular pathogen Trypanosoma brucei as a model, we reveal important regional folding information of the native telomerase RNA core domains, i.e. TR template, template boundary element, template proximal helix and Helix IV (eCR4-CR5) domain. For this purpose, we uniquely combined in-cell probing with targeted high-throughput RNA sequencing and mutational mapping under three conditions: in vivo (in WT and TERT−/− cells), in an immunopurified catalytically active telomerase RNP complex and ex vivo (deproteinized). We discover that TR forms at least two different conformers with distinct folding topologies in the insect and mammalian developmental stages of T. brucei. Also, TERT does not significantly affect the RNA folding in vivo, suggesting that the telomerase RNA in T. brucei exists in a conformationally preorganized stable structure. Our observed differences in RNA (TR) folding at two distinct developmental stages of T. brucei suggest that important conformational changes are a key component of T. brucei development.
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影响因子:
5.6
作者:
Daher M;Widom JR;Tay W;Walter NG
通讯作者:
Walter NG
DOI:
10.1126/science.1170633
发表时间:
2009-11-13
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
de Lange T
通讯作者:
de Lange T
DOI:
10.1093/bioinformatics/btp250
发表时间:
2009-08-01
期刊:
Bioinformatics (Oxford, England)
影响因子:
--
作者:
Darty K;Denise A;Ponty Y
通讯作者:
Ponty Y
影响因子:
14.9
作者:
Brown Y;Abraham M;Pearl S;Kabaha MM;Elboher E;Tzfati Y
通讯作者:
Tzfati Y
影响因子:
5.3
作者:
Cunningham, DD;Collins, K
通讯作者:
Collins, K