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Detection of APOBEC3B's RNA binding sites in T-47D cells using eCLIP-seq

ABSTRACT: Detection of APOBEC3B's RNA binding sites in T-47D cells using eCLIP-seq

PROVIDER: PRJNA1029591 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR26422073.fastq.gz	Fastqsanger.gz
	SRR26422074.fastq.gz	Fastqsanger.gz
	SRR26422075.fastq.gz	Fastqsanger.gz
	SRR26422076.fastq.gz	Fastqsanger.gz

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Detection of APOBEC3B's RNA binding sites in T-47D cells using eCLIP-seq

Project description:RNA editing is a crucial post-transcriptional process that diversifies proteomic outcomes and influences gene expression. Particularly, the APOBEC3 family has emerged as a significant player in this mechanism, with APOBEC3A (A3A) showing notable roles in immune response and stress conditions. APOBEC3B (A3B), another family member, has garnered attention for its potential role in breast cancer genomic mutations. In this study, we employ an inducible expression cell model and eCLIP-seq to detect the RNA binding sites for A3B a breast cancer cell model. Our findings indicate that A3B engages in selective RNA editing and targets NEAT1 and MALAT1 long non-coding RNAs. Notably, the binding of these RNAs sequesters A3B’s catalytic activity, and thereby affects A3A’s activity through a feedback loop.

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Project description:RNA binding proteins (RBPs) play essential roles in cellular physiology by interacting with target RNAs. As defects in protein-RNA recognition lead to human disease, UV-crosslinking and immunoprecipitation (CLIP) of ribonuclear complexes followed by deep sequencing (-seq) is critical in constructing protein-RNA maps to expand our understanding of RBP function. However, current CLIP protocols are technically demanding and involve low complexity libraries that yield squandered sequencing of PCR duplicates and high experimental failure rates. To enable truly large-scale implementation of CLIP-seq, we have developed an enhanced CLIP methodology (eCLIP) that features a decrease of ~10 cycles of requisite amplification with a concomitant >60% decrease in discarded PCR duplicate reads, while maintaining the ability to identify RNA binding with single-nucleotide resolution. By simplifying the generation of paired IgG and size-matched input controls, eCLIP also dramatically improves specificity in discovery of authentic binding sites. To demonstrate that eCLIP enables large-scale and robust profiling of RBPs, 102 eCLIP experiments in biological duplicate for a diverse collection of 74 RBPs in HepG2 and K562 cells were completed (available at https://www.encodeproject.org). We establish that eCLIP is comparable in amplification and sample requirements to ChIP-seq, and enables integrative analysis of diverse RBPs to reveal factor-specific profiles, common artifacts for CLIP experiments and RNA-centric perspectives of RBP activity.

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