当前位置： SCI文献检索 > BIOCHEMISTRY期刊下所有文献 > Extended Recognition of the Histone H3 Tail by Histone Demethylase KDM5A.

Extended Recognition of the Histone H3 Tail by Histone Demethylase KDM5A.

Abstract：

:Human lysine demethylase KDM5A is a chromatin-modifying enzyme associated with transcriptional regulation, because of its ability to catalyze removal of methyl groups from methylated lysine 4 of histone H3 (H3K4me3). Amplification of KDM5A is observed in many cancers, including breast cancer, prostate cancer, hepatocellular carcinoma, lung cancer, and gastric cancer. In this study, we employed alanine scanning mutagenesis to investigate substrate recognition of KDM5A and identify the H3 tail residues necessary for KDM5A-catalyzed demethylation. Our data show that the H3Q5 residue is critical for substrate recognition by KDM5A. Our data also reveal that the protein-protein interactions between KDM5A and the histone H3 tail extend beyond the amino acids proximal to the substrate mark. Specifically, demethylation activity assays show that deletion or mutation of residues at positions 14-18 on the H3 tail results in an 8-fold increase in the KMapp, compared to wild-type 18mer peptide, suggesting that this distal epitope is important in histone engagement. Finally, we demonstrate that post-translational modifications on this distal epitope can modulate KDM5A-dependent demethylation. Our findings provide insights into H3K4-specific recognition by KDM5A, as well as how chromatin context can regulate KDM5A activity and H3K4 methylation status.

journal_name

Biochemistry

journal_title

Biochemistry

authors

Petronikolou N,Longbotham JE,Fujimori DG

doi

10.1021/acs.biochem.9b01036

subject

Has Abstract

pub_date

2020-02-11 00:00:00

pages

647-651

issue

5

eissn

0006-2960

issn

1520-4995

journal_volume

59

pub_type

杂志文章

相关文献

BIOCHEMISTRY文献大全