Publication Date:
2011-02-12
Description:
Splicing of mammalian precursor transfer RNA (tRNA) molecules involves two enzymatic steps. First, intron removal by the tRNA splicing endonuclease generates separate 5' and 3' exons. In animals, the second step predominantly entails direct exon ligation by an elusive RNA ligase. Using activity-guided purification of tRNA ligase from HeLa cell extracts, we identified HSPC117, a member of the UPF0027 (RtcB) family, as the essential subunit of a tRNA ligase complex. RNA interference-mediated depletion of HSPC117 inhibited maturation of intron-containing pre-tRNA both in vitro and in living cells. The high sequence conservation of HSPC117/RtcB proteins is suggestive of RNA ligase roles of this protein family in various organisms.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Popow, Johannes -- Englert, Markus -- Weitzer, Stefan -- Schleiffer, Alexander -- Mierzwa, Beata -- Mechtler, Karl -- Trowitzsch, Simon -- Will, Cindy L -- Luhrmann, Reinhard -- Soll, Dieter -- Martinez, Javier -- New York, N.Y. -- Science. 2011 Feb 11;331(6018):760-4. doi: 10.1126/science.1197847.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), A-1030 Vienna, Austria.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21311021" target="_blank"〉PubMed〈/a〉
Keywords:
Amino Acid Sequence
;
Exons
;
HeLa Cells
;
Humans
;
Introns
;
Molecular Sequence Data
;
Proteins/*chemistry/isolation & purification/*metabolism
;
RNA Interference
;
RNA Ligase (ATP)/*chemistry/isolation & purification/*metabolism
;
RNA Precursors/*metabolism
;
*RNA Splicing
;
RNA, Transfer/*metabolism
;
Spliceosomes/metabolism
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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