Cellular zinc status alters chromatin accessibility and binding of p53 to DNA. Journal Article uri icon

Overview

abstract

  • Zn2+ is an essential metal required by approximately 850 human transcription factors. How these proteins acquire their essential Zn2+ cofactor and whether they are sensitive to changes in the labile Zn2+ pool in cells remain open questions. Using ATAC-seq to profile regions of accessible chromatin coupled with transcription factor enrichment analysis, we examined how increases and decreases in the labile zinc pool affect chromatin accessibility and transcription factor enrichment. We found 685 transcription factor motifs were differentially enriched, corresponding to 507 unique transcription factors. The pattern of perturbation and the types of transcription factors were notably different at promoters versus intergenic regions, with zinc-finger transcription factors strongly enriched in intergenic regions in elevated Zn2+ To test whether ATAC-seq and transcription factor enrichment analysis predictions correlate with changes in transcription factor binding, we used ChIP-qPCR to profile six p53 binding sites. We found that for five of the six targets, p53 binding correlates with the local accessibility determined by ATAC-seq. These results demonstrate that changes in labile zinc alter chromatin accessibility and transcription factor binding to DNA.

publication date

  • September 1, 2024

has subject area

has restriction

  • gold

Date in CU Experts

  • July 10, 2024 4:55 AM

Full Author List

  • Ocampo D; Damon LJ; Sanford L; Holtzen SE; Jones T; Allen MA; Dowell RD; Palmer AE

author count

  • 8

Other Profiles

Electronic International Standard Serial Number (EISSN)

  • 2575-1077

Additional Document Info

volume

  • 7

issue

  • 9