Structural insights into the stabilization of MALAT1 noncoding RNA by a bipartite triple helix.
Structural insights into the stabilization of MALAT1 noncoding RNA by a bipartite triple helix.
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DOI:
10.1038/nsmb.2844
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发表时间:
2014-07
影响因子:
16.8
通讯作者:
Steitz JA
中科院分区:
文献类型:
--
作者:
Brown JA;Bulkley D;Wang J;Valenstein ML;Yario TA;Steitz TA;Steitz JA
Metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) is a highly-abundant nuclear long noncoding RNA that promotes malignancy. A 3′-stem-loop structure is predicted to confer stability by engaging a downstream A-rich tract in a triple helix, similar to the expression and nuclear retention element (ENE) from the KSHV polyadenylated nuclear RNA. The 3.1-Å resolution crystal structure of the human MALAT1 ENE and A-rich tract reveals a bipartite triple helix containing stacks of five and four U•A-U triples separated by a C+•G-C triplet and C-G doublet, extended by two A-minor interactions. In vivo decay assays indicate that this blunt-ended triple helix, with the 3′ nucleotide in a U•A-U triple, inhibits rapid nuclear RNA decay. Interruption of the triple helix by the C-G doublet induces a “helical reset” that explains why triple-helical stacks longer than six do not occur in nature.
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影响因子:
4.8
作者:
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通讯作者:
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DOI:
10.1073/pnas.081082398
发表时间:
2001-04-24
影响因子:
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