- EMDB-26339: Nucleosome core particle with AP-site at SHL0 -
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基本情報
登録情報
データベース: EMDB / ID: EMD-26339
タイトル
Nucleosome core particle with AP-site at SHL0
マップデータ
試料
複合体: nucleosome core particle with AP-site at SHL0
タンパク質・ペプチド: Histone H3.2
タンパク質・ペプチド: Histone H4
タンパク質・ペプチド: Histone H2A type 1
タンパク質・ペプチド: Histone H2B type 1-C/E/F/G/I
DNA: DNA (144-MER)
DNA: DNA (144-MER)
キーワード
nucleosome / DNA damage / DNA repair / DNA BINDING PROTEIN / DNA BINDING PROTEIN-DNA complex
機能・相同性
機能・相同性情報
negative regulation of megakaryocyte differentiation / protein localization to CENP-A containing chromatin / Chromatin modifying enzymes / Replacement of protamines by nucleosomes in the male pronucleus / CENP-A containing nucleosome / Packaging Of Telomere Ends / Recognition and association of DNA glycosylase with site containing an affected purine / Cleavage of the damaged purine / Recognition and association of DNA glycosylase with site containing an affected pyrimidine / Cleavage of the damaged pyrimidine ...negative regulation of megakaryocyte differentiation / protein localization to CENP-A containing chromatin / Chromatin modifying enzymes / Replacement of protamines by nucleosomes in the male pronucleus / CENP-A containing nucleosome / Packaging Of Telomere Ends / Recognition and association of DNA glycosylase with site containing an affected purine / Cleavage of the damaged purine / Recognition and association of DNA glycosylase with site containing an affected pyrimidine / Cleavage of the damaged pyrimidine / Deposition of new CENPA-containing nucleosomes at the centromere / telomere organization / Interleukin-7 signaling / Inhibition of DNA recombination at telomere / Meiotic synapsis / RNA Polymerase I Promoter Opening / Assembly of the ORC complex at the origin of replication / innate immune response in mucosa / Regulation of endogenous retroelements by the Human Silencing Hub (HUSH) complex / SUMOylation of chromatin organization proteins / DNA methylation / Condensation of Prophase Chromosomes / Chromatin modifications during the maternal to zygotic transition (MZT) / HCMV Late Events / SIRT1 negatively regulates rRNA expression / ERCC6 (CSB) and EHMT2 (G9a) positively regulate rRNA expression / PRC2 methylates histones and DNA / Regulation of endogenous retroelements by KRAB-ZFP proteins / Defective pyroptosis / Regulation of endogenous retroelements by Piwi-interacting RNAs (piRNAs) / HDACs deacetylate histones / Nonhomologous End-Joining (NHEJ) / RNA Polymerase I Promoter Escape / Transcriptional regulation by small RNAs / Formation of the beta-catenin:TCF transactivating complex / RUNX1 regulates genes involved in megakaryocyte differentiation and platelet function / Activated PKN1 stimulates transcription of AR (androgen receptor) regulated genes KLK2 and KLK3 / HDMs demethylate histones / G2/M DNA damage checkpoint / NoRC negatively regulates rRNA expression / DNA Damage/Telomere Stress Induced Senescence / B-WICH complex positively regulates rRNA expression / PKMTs methylate histone lysines / Meiotic recombination / Pre-NOTCH Transcription and Translation / Metalloprotease DUBs / RMTs methylate histone arginines / Activation of anterior HOX genes in hindbrain development during early embryogenesis / Transcriptional regulation of granulopoiesis / antimicrobial humoral immune response mediated by antimicrobial peptide / HCMV Early Events / structural constituent of chromatin / antibacterial humoral response / UCH proteinases / nucleosome / heterochromatin formation / E3 ubiquitin ligases ubiquitinate target proteins / nucleosome assembly / Recruitment and ATM-mediated phosphorylation of repair and signaling proteins at DNA double strand breaks / HATs acetylate histones / RUNX1 regulates transcription of genes involved in differentiation of HSCs / chromatin organization / Factors involved in megakaryocyte development and platelet production / MLL4 and MLL3 complexes regulate expression of PPARG target genes in adipogenesis and hepatic steatosis / Processing of DNA double-strand break ends / Senescence-Associated Secretory Phenotype (SASP) / Oxidative Stress Induced Senescence / Estrogen-dependent gene expression / chromosome, telomeric region / defense response to Gram-positive bacterium / Ub-specific processing proteases / Amyloid fiber formation / protein heterodimerization activity / enzyme binding / protein-containing complex / DNA binding / extracellular space / RNA binding / extracellular exosome / extracellular region / nucleoplasm / identical protein binding / nucleus / membrane / cytosol 類似検索 - 分子機能
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R35GM128562
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
F32GM140718
米国
引用
ジャーナル: Nat Commun / 年: 2022 タイトル: Structural basis for APE1 processing DNA damage in the nucleosome. 著者: Tyler M Weaver / Nicole M Hoitsma / Jonah J Spencer / Lokesh Gakhar / Nicholas J Schnicker / Bret D Freudenthal / 要旨: Genomic DNA is continually exposed to endogenous and exogenous factors that promote DNA damage. Eukaryotic genomic DNA is packaged into nucleosomes, which present a barrier to accessing and ...Genomic DNA is continually exposed to endogenous and exogenous factors that promote DNA damage. Eukaryotic genomic DNA is packaged into nucleosomes, which present a barrier to accessing and effectively repairing DNA damage. The mechanisms by which DNA repair proteins overcome this barrier to repair DNA damage in the nucleosome and protect genomic stability is unknown. Here, we determine how the base excision repair (BER) endonuclease AP-endonuclease 1 (APE1) recognizes and cleaves DNA damage in the nucleosome. Kinetic assays determine that APE1 cleaves solvent-exposed AP sites in the nucleosome with 3 - 6 orders of magnitude higher efficiency than occluded AP sites. A cryo-electron microscopy structure of APE1 bound to a nucleosome containing a solvent-exposed AP site reveal that APE1 uses a DNA sculpting mechanism for AP site recognition, where APE1 bends the nucleosomal DNA to access the AP site. Notably, additional biochemical and structural characterization of occluded AP sites identify contacts between the nucleosomal DNA and histone octamer that prevent efficient processing of the AP site by APE1. These findings provide a rationale for the position-dependent activity of BER proteins in the nucleosome and suggests the ability of BER proteins to sculpt nucleosomal DNA drives efficient BER in chromatin.