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Series GSE194288 Query DataSets for GSE194288
Status Public on Jan 21, 2025
Title Krüppel-Like Factor 5 regulates CFTR expression through repression by maintaining chromatin architecture coupled with direct enhancer activation
Organism Homo sapiens
Experiment type Other
Summary Single cell RNA-sequencing has accurately identified cell types within the human airway that express the Cystic Fibrosis Transmembrane Conductance regulator (CFTR) gene. Low abundance CFTR transcripts are seen in many secretory cells, while high levels are restricted to rare pulmonary ionocytes. Here we focus on the mechanisms coordinating basal CFTR expression in the secretory compartment. Cell-selective regulation of CFTR is achieved within its invariant topologically associating domain by the recruitment of cis-regulatory elements (CREs). CRE activity is coordinated by cell-type-selective transcription factors. One such factor, Krüppel-Like Factor 5 (KLF5), profoundly represses CFTR transcript and protein in primary human airway epithelial cells and airway cell lines. Here we reveal the mechanism of action of KLF5 upon the CFTR gene. We find that depletion or ablation of KLF5 from airway epithelial cells changes higher order chromatin structure at the CFTR locus. Critical looping interactions that are required for normal gene expression are altered, the H3K27ac active chromatin mark is redistributed, and CTCF occupancy is modified. However, mutation of a single KLF5 binding site within a pivotal airway cell CRE abolishes CFTR expression. Hence, KLF5 has both direct activating and indirect repressive effects, which together coordinate CFTR expression in the airway.
 
Overall design Analysis of the 3D chromatin architecture with 4C-seq at the CFTR and chr7.11p13 locus to determine interaction frequencies between elements in response to depletion or ablation of KLF5
 
Contributor(s) Paranjapye A, NandyMazumdar M, Harris A
Citation(s) 35341742
Submission date Jan 24, 2022
Last update date Jan 22, 2025
Contact name Ann Harris
E-mail(s) axh575@case.edu
Organization name Case Western Reserve University
Department Genetics and Genome Sciences
Street address 2109 Adelbert Rd Building
City Cleveland
State/province Ohio
ZIP/Postal code 44106
Country USA
 
Platforms (1)
GPL21697 NextSeq 550 (Homo sapiens)
Samples (30)
GSM5832444 Calu-3 NC CFTR promoter
GSM5832445 Calu-3 NC -20.9 kb
GSM5832446 Calu-3 NC -80.1 kb
Relations
BioProject PRJNA800071

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Supplementary file Size Download File type/resource
GSE194288_RAW.tar 149.8 Mb (http)(custom) TAR (of BW)
SRA Run SelectorHelp
Raw data are available in SRA
Processed data provided as supplementary file

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