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Nucleic acid chaperone properties of ORF1p from the non-LTR retrotransposon, LINE-1 Martin SLRNA Biol 2010[Nov]; 7 (6): 706-11Long interspersed element-1 (LINE-1, or L1) is a non-long terminal repeat (LTR) retrotransposon that has amplified to hundreds of thousands of copies in mammalian evolution. A small number of the individual copies of L1 are active retrotransposons which are presently replicating in most species, including humans and mice. L1 retrotransposition begins with transcription of an active element and ends with a newly inserted cDNA copy, a process which requires the two element-encoded proteins to act in cis on the L1 RNA. The ORF1 protein (ORF1p) is a high-affinity, non-sequence-specific RNA binding protein with nucleic acid chaperone activity, whereas the ORF2 protein (ORF2p) supplies the enzymatic activities for cDNA synthesis. This article reviews the nucleic acid chaperone properties of ORF1p in the context of L1 retrotransposition.|Animals[MESH]|Humans[MESH]|Long Interspersed Nucleotide Elements/*physiology[MESH]|Molecular Chaperones/*metabolism[MESH]|Nucleic Acids/*metabolism[MESH]|Open Reading Frames/*physiology[MESH] |
