High-throughput sequencing of RNA isolated by crosslinking immunoprecipitation (HITS-CLIP) is a variant of CLIP[1] for genome-wide mapping protein–RNA binding sites or RNA modification sites in vivo.[2][3][4] HITS-CLIP was originally used to generate genome-wide protein-RNA interaction maps for the neuron-specific RNA-binding protein and splicing factorNOVA1 and NOVA2;[3] since then a number of other splicing factor maps have been generated, including those for PTB,[5] RbFox2,[6] SFRS1,[7] hnRNP C,[8] and even N6-Methyladenosine (m6A) mRNA modifications.[4][9]
As a novel modification of HITS-CLIP, m6A-CLIP was developed to precisely map N6-Methyladenosine(m6A) locations in mRNA by UV-crosslinking m6A antibody to the target RNA.[4][9] Recently, improved bioinformatics applied to Argonaute HITS-CLIP enables identification of binding sites with single nucleotide resolution.[16]
Similar methods
PAR-CLIP, for identifying the binding sites of cellular RNA-binding proteins (RBPs) and microRNA-containing ribonucleoprotein complexes (miRNPs) in tissue culture cells.
iCLIP, for a thorough amplification of the cDNA library, including truncated cDNAs, thus also enabling an additional means to identify crosslink sites.
^Xue Y, Zhou Y, Wu T, Zhu T, Ju X, Kwon YS, Zhang C, Yeo G, Black DL, Sun H, Fu XD, Zhang Y (2009), "Genome-wide analysis of PTB-RNA interactions reveals a strategy used by the general splicing repressor to modulate exon inclusion or skipping", Molecular Cell, 36 (6): 996–1006, doi:10.1016/j.molcel.2009.12.003, PMC2807993, PMID20064465
^Leung AK, Young AG, Bhutkar A, Zheng GX, Bosson AD, Nielsen CB, Sharp PA (2011), "Genome-wide identification of Ago2 binding sites from mouse embryonic stem cells with and without mature microRNAs", Nat Struct Mol Biol, 19 (9): 1084, doi:10.1038/nsmb0911-1084a, PMC3078052
^Hafner M, Landthaler M, Burger L, Khorshid M, Hausser J, Berninger P, Rothballer A, Ascano M Jr, Jungkamp AC, Munschauer M, Ulrich A, Wardle GS, Dewell S, Zavolan M, Tuschl T (2010), "Transcriptome-wide identification of RNA-binding protein and microRNA target sites by PAR-CLIP", Cell, 141 (1): 129–141, doi:10.1016/j.cell.2010.03.009, PMC2861495, PMID20371350