Identification and Characterization of a Class of MALAT1-like Genomic Loci.
Identification and Characterization of a Class of MALAT1-like Genomic Loci.
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DOI:
10.1016/j.celrep.2017.05.006
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发表时间:
2017-05-23
期刊:
影响因子:
8.8
通讯作者:
Spector DL
中科院分区:
文献类型:
--
作者:
Zhang B;Mao YS;Diermeier SD;Novikova IV;Nawrocki EP;Jones TA;Lazar Z;Tung CS;Luo W;Eddy SR;Sanbonmatsu KY;Spector DL
The MALAT1 (Metastasis-Associated Lung Adenocarcinoma Transcript 1) gene encodes a non-coding RNA that is processed into a long nuclear retained transcript (MALAT1) and a small cytoplasmic tRNA-like transcript (mascRNA). Using a RNA sequence- and structure-based covariance model, we identified more than 130 genomic loci in vertebrate genomes containing the MALAT1 3′-end triple helix structure and its immediate downstream tRNA-like structure, including 44 in the green lizard Anolis carolinensis. Structural and computational analyses revealed a coevolution of the 3′-end module. MALAT1-like genes in Anolis carolinensis are highly expressed in adult testis, thus we named them testis-abundant long noncoding RNAs (tancRNAs). MALAT1-like loci also produce multiple small RNA species, including piRNAs, from the antisense strand. The coevolved 3′-ends of tancRNAs serve as potential targets for the PIWI-piRNA complex. Thus, we have identified an evolutionarily conserved class of lncRNAs with similar structural constraints, post-transcriptional processing, subcellular localization and a distinct function in spermatocytes.
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