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PIE-Seq: Identifying RNA-binding Protein Targets by Dual RNA-deaminase Editing and Sequencing

ABSTRACT: PIE-Seq: Identifying RNA-binding Protein Targets by Dual RNA-deaminase Editing and Sequencing

PROVIDER: PRJNA655741 | ENA |

REPOSITORIES: ENA

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PIE-Seq: Identifying RNA-binding Protein Targets by Dual RNA-deaminase Editing and Sequencing

Project description:RNA-binding proteins (RBPs) are essential for posttranscriptional gene regulation, but it remains a challenge to identify RNA targets of RBPs from specific cell types. Here we present PIE-Seq to investigate Protein-RNA Interaction with dual-deaminase Editing and Sequencing by conjugating C-to-U and A-to-I RNA deaminases to RBPs. We benchmark the method and demonstrate its sensitivity in single cells, its application in the developing brain, and its scalability with 25 human RBPs involved in diverse biological functions. Bulk PIE-Seq reveals canonical binding features and target genes for RBPs such as PUM2 and NOVA1, and nominates new target genes for most tested RBPs such as SRSF1 and TDP-43/TARDBP. Integrative analyses show that homologous RBPs frequently bind to comparable sequences and target gene sets while different RBP families bind to distinct targets, indicating that PIE-Seq is robust to uncovering RBP targets. Single-cell PIE-PUM2 uncovers comparable targets to bulk samples and applying PIE-PUM2 to the developing mouse neocortex identifies neural-progenitor- and neuron-specific target genes. In summary, the dual-deaminase PIE-Seq joins the editable nucleotide space for single editors and provides an orthogonal approach and resource to uncover RBP targets in mice and human cells.

2023-05-17 | GSE155844 | GEO

PIE-seq: identifying RNA-binding protein targets by dual RNA-deaminase editing and sequencing.

Project description:RNA-binding proteins (RBPs) are essential for gene regulation, but it remains a challenge to identify their RNA targets across cell types. Here we present PIE-Seq to investigate Protein-RNA Interaction with dual-deaminase Editing and Sequencing by conjugating C-to-U and A-to-I base editors to RBPs. We benchmark PIE-Seq and demonstrate its sensitivity in single cells, its application in the developing brain, and its scalability with 25 human RBPs. Bulk PIE-Seq identifies canonical binding features for RBPs such as PUM2 and NOVA1, and nominates additional target genes for most tested RBPs such as SRSF1 and TDP-43/TARDBP. Homologous RBPs frequently edit similar sequences and gene sets in PIE-Seq while different RBP families show distinct targets. Single-cell PIE-PUM2 uncovers comparable targets to bulk samples and applying PIE-PUM2 to the developing mouse neocortex identifies neural-progenitor- and neuron-specific target genes such as App. In summary, PIE-Seq provides an orthogonal approach and resource to uncover RBP targets in mice and human cells.

| S-EPMC10244410 | biostudies-literature

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Base editing with a Cpf1–cytidine deaminase fusion

Project description:The targeting range of CRISPR-Cas9 base editors (BEs) is limited by their G/C-rich PAM sequences. To overcome this limitation, we developed a CRISPR/Cpf1-based BE by fusing the rat cytosine deaminase APOBEC1 to a catalytically inactive version of Lachnospiraceae bacterium Cpf1. The base editor recognizes a T-rich PAM sequence and converts C to T in human cells with low levels of indels, non-C-to-T substitutions and off-target editing.

2018-03-18 | GSE110136 | GEO

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