HIST1H3A (Ab-27) Antibody

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Description

Introduction to HIST1H3A and Its Epigenetic Significance

HIST1H3A encodes histone H3.1, a core component of nucleosomes responsible for DNA packaging and chromatin regulation. Post-translational modifications (PTMs) at lysine 27 (K27) of histone H3—including acetylation (K27ac), mono- (K27me1), di- (K27me2), and tri-methylation (K27me3)—play critical roles in transcriptional regulation, heterochromatin formation, and cellular differentiation . Antibodies targeting these modifications are essential tools for studying epigenetic mechanisms.

Key Antibodies Targeting HIST1H3A K27 Modifications

Below is a comparative analysis of antibodies specific to HIST1H3A K27 PTMs, validated across multiple applications (e.g., Western blot [WB], chromatin immunoprecipitation [ChIP], immunofluorescence [IF]):

AntibodyTargetClonalityHostApplicationsSpecificity & Cross-ReactivityValidation
ab4729 H3K27acPolyclonalRabbitWB, IHC, IF, ChIPSpecific to acetylated K27; validated via peptide blocking and ChIP in human, mouse, and rat cellsPeptide array, WB (17 kDa band in HeLa cells), IHC (human colon)
ab192985 H3K27me3MonoclonalRabbitWB, ChIP-seq, ICC/IF14% cross-reactivity with H3K27me2; no cross-reactivity with K27me1 or unmodified H3 ELISA, multi-tissue IHC, ChIP-seq (NIH/3T3 cells)
ab6002 H3K27me3MonoclonalMouseWB, IF<12% cross-reactivity with H3K27me2; validated in human and mouse ELISA against semi-synthetic peptides, WB (15 kDa band in HeLa lysates)
ab24684 H3K27me2PolyclonalRabbitWB, ChIP, ICC/IFSpecific to di-methyl K27; no cross-reactivity with K27me1 or K27me3 ChIP validation in HeLa cells (active/inactive loci)
07-448 H3K27me1PolyclonalRabbitWB, ICC, ChIP-seqSpecific to mono-methyl K27; validated in human and vertebrate models Dot blot, ChIP-seq (ES cells), WB (17 kDa band)
ab195477 H3K27me3PolyclonalRabbitChIP, ChIP-seqSpecific to tri-methyl K27; validated in HeLaS3 cells ChIP-qPCR (MYT1/TSH2B loci), ChIP-seq (Illumina HiSeq)

Specificity and Cross-Reactivity

  • H3K27me3 Antibodies:

    • ab192985 shows 14% cross-reactivity with H3K27me2 in ELISA .

    • ab6002 exhibits <12% cross-reactivity with H3K27me2 but no binding to unmodified H3 .

    • Cross-reactivity issues were identified in some H3K27me3 antibodies (e.g., H3K4me3 cross-reactivity in yeast models) .

Functional Insights from ChIP and WB

  • ab4729 (H3K27ac):

    • Enriched at active enhancers/promoters (e.g., GAPDH promoter in ChIP) .

    • WB shows a 17 kDa band in sodium butyrate-treated HeLa cells .

  • ab195477 (H3K27me3):

    • ChIP-seq in HeLaS3 cells reveals enrichment at inactive loci (e.g., MYT1, TSH2B) .

Critical Considerations for Antibody Selection

  • Batch Consistency: Recombinant formats (e.g., ab192985) ensure uniformity .

  • Species Reactivity: Most antibodies are validated in human, mouse, and rat .

  • Application-Specific Optimization:

    • ChIP requires titration (e.g., 1–10 µg/IP for ab195477) .

    • IHC protocols may require antigen retrieval (e.g., sodium citrate buffer for ab4729) .

Emerging Challenges and Solutions

  • Cross-Reactivity: Rigorous validation using peptide arrays or knockout models (e.g., PRC2-deficient cells) is critical .

  • Epitope Accessibility: Semi-synthetic nucleosomes improve ChIP specificity assessments .

Product Specs

Buffer
Preservative: 0.03% Proclin 300
Constituents: 50% Glycerol, 0.01M PBS, pH 7.4
Form
Liquid
Lead Time
Generally, we can ship your order within 1-3 business days of receiving it. Delivery times may vary depending on the shipping method and destination. Please contact your local distributor for specific delivery times.
Synonyms
H3 histone family member E pseudogene antibody; H3 histone family; member A antibody; H3/A antibody; H31_HUMAN antibody; H3F3 antibody; H3FA antibody; Hist1h3a antibody; HIST1H3B antibody; HIST1H3C antibody; HIST1H3D antibody; HIST1H3E antibody; HIST1H3F antibody; HIST1H3G antibody; HIST1H3H antibody; HIST1H3I antibody; HIST1H3J antibody; HIST3H3 antibody; histone 1; H3a antibody; Histone cluster 1; H3a antibody; Histone H3 3 pseudogene antibody; Histone H3.1 antibody; Histone H3/a antibody; Histone H3/b antibody; Histone H3/c antibody; Histone H3/d antibody; Histone H3/f antibody; Histone H3/h antibody; Histone H3/i antibody; Histone H3/j antibody; Histone H3/k antibody; Histone H3/l antibody
Target Names
Uniprot No.

Target Background

Function
Histone H3 is a core component of the nucleosome. Nucleosomes wrap and compact DNA into chromatin, limiting DNA accessibility to cellular machinery that requires DNA as a template. Histones therefore play a crucial role in transcription regulation, DNA repair, DNA replication, and chromosomal stability. DNA accessibility is regulated via a complex set of post-translational modifications of histones, also called the histone code, and nucleosome remodeling.
Gene References Into Functions
  1. Studies suggest that epigenetic regulation in cancer may be mediated by inducing E3 ubiquitin ligase NEDD4-dependent histone H3 ubiquitination. PMID: 28300060
  2. The identification of increased expression of H3K27me3 during a patient's clinical course can aid in determining whether tumors are heterochronous. PMID: 29482987
  3. Research indicates that JMJD5, a Jumonji C (JmjC) domain-containing protein, acts as a Cathepsin L-type protease that mediates histone H3 N-tail proteolytic cleavage under stress conditions causing a DNA damage response. PMID: 28982940
  4. Evidence suggests that the Ki-67 antigen proliferative index has significant limitations and phosphohistone H3 (PHH3) is an alternative proliferative marker. PMID: 29040195
  5. Findings indicate that cytokine-induced histone 3 lysine 27 trimethylation serves as a mechanism that stabilizes gene silencing in macrophages. PMID: 27653678
  6. This data reveals that in the early developing human brain, HIST1H3B comprises the largest proportion of H3.1 transcripts among H3.1 isoforms. PMID: 27251074
  7. A series of 47 diffuse midline gliomas demonstrated that the histone H3-K27M mutation was mutually exclusive with IDH1-R132H mutation and EGFR amplification, rarely co-occurred with BRAF-V600E mutation, and was frequently associated with p53 overexpression, ATRX loss, and monosomy 10. PMID: 26517431
  8. Data demonstrate that the histone chaperone HIRA co-localizes with viral genomes, binds to incoming viral and deposits histone H3.3 onto these. PMID: 28981850
  9. Experiments have shown that PHF13 binds specifically to DNA and to two types of histone H3 methyl tags (lysine 4-tri-methyl or lysine 4-di-methyl) where it functions as a transcriptional co-regulator. PMID: 27223324
  10. Hemi-methylated CpGs DNA recognition activates UHRF1 ubiquitylation towards multiple lysines on the H3 tail adjacent to the UHRF1 histone-binding site. PMID: 27595565
  11. This research presents, for the first time, the MR imaging features of pediatric diffuse midline gliomas with histone H3 K27M mutation. PMID: 28183840
  12. Approximately 30% of pediatric high-grade gliomas (pedHGG) including GBM and DIPG harbor a lysine 27 mutation (K27M) in histone 3.3 (H3.3) which is correlated with poor outcome and was shown to influence EZH2 function. PMID: 27135271
  13. H3F3A K27M mutation in adult cerebellar HGG is not uncommon. PMID: 28547652
  14. Data reveal that lysyl oxidase-like 2 (LOXL2) is a histone modifier enzyme that removes trimethylated lysine 4 (K4) in histone H3 (H3K4me3) through an amino-oxidase reaction. PMID: 27735137
  15. Histone H3 lysine 9 (H3K9) acetylation was most prevalent when the Dbf4 transcription level was highest whereas the H3K9me3 level was greatest during and just after replication. PMID: 27341472
  16. The SPOP-containing complex regulates SETD2 stability and H3K36me3-coupled alternative splicing. PMID: 27614073
  17. Research suggests that binding of the helical tail of histone 3 (H3) with PHD ('plant homeodomain') fingers of BAZ2A or BAZ2B (bromodomain adjacent to zinc finger domain 2A or 2B) requires molecular recognition of secondary structure motifs within the H3 tail and could represent an additional layer of regulation in epigenetic processes. PMID: 28341809
  18. Results demonstrate a novel mechanism by which Kdm4d regulates DNA replication by reducing the H3K9me3 level to facilitate formation of the preinitiation complex. PMID: 27679476
  19. Histone H3 modifications caused by traffic-derived airborne particulate matter exposures in leukocytes. PMID: 27918982
  20. A key role of persistent histone H3 serine 10 or serine 28 phosphorylation in chemical carcinogenesis through regulating gene transcription of DNA damage response genes. PMID: 27996159
  21. hTERT promoter mutations are frequent in medulloblastoma and are associated with older patients, prone to recurrence and located in the right cerebellar hemisphere. Conversely, histone 3 mutations do not seem to be present in medulloblastoma. PMID: 27694758
  22. AS1eRNA-driven DNA looping and activating histone modifications promote the expression of DHRS4-AS1 to economically control the DHRS4 gene cluster. PMID: 26864944
  23. Data suggest that nuclear antigen Sp100C is a multifaceted histone H3 methylation and phosphorylation sensor. PMID: 27129259
  24. The authors propose that histone H3 threonine 118 phosphorylation via Aurora-A alters the chromatin structure during specific phases of mitosis to promote timely condensin I and cohesin disassociation, which is essential for effective chromosome segregation. PMID: 26878753
  25. Hemi-methylated DNA opens a closed conformation of UHRF1 to facilitate its H3 histone recognition. PMID: 27045799
  26. Functional importance of H3K9me3 in hypoxia, apoptosis, and repression of APAK. PMID: 25961932
  27. Taken together, the authors confirmed that histone H3 is a real substrate for GzmA in vivo in the Raji cells treated by staurosporin. PMID: 26032366
  28. Research indicates that circulating H3 levels correlate with mortality in sepsis patients and inversely correlate with antithrombin levels and platelet counts. PMID: 26232351
  29. Data demonstrate that double mutations on the residues in the interface (L325A/D328A) decrease the histone H3 H3K4me2/3 demethylation activity of lysine (K)-specific demethylase 5B (KDM5B). PMID: 24952722
  30. Data suggest that minichromosome maintenance protein 2 (MCM2) binding is not required for incorporation of histone H3.1-H4 into chromatin but is important for the stability of H3.1-H4. PMID: 26167883
  31. Data suggest that histone H3 lysine methylation (H3K4me3) plays a crucial role in leukemia stem cell (LSC) maintenance. PMID: 26190263
  32. PIP5K1A modulates ribosomal RNA gene silencing through its interaction with histone H3 lysine 9 trimethylation and heterochromatin protein HP1-alpha. PMID: 26157143
  33. Data indicate that lower-resolution mass spectrometry instruments can be utilized for histone post-translational modifications (PTMs) analysis. PMID: 25325711
  34. Research suggests that inhibition of lysine-specific demethylase 1 activity prevented IL-1beta-induced histone H3 lysine 9 (H3K9) demethylation at the microsomal prostaglandin E synthase 1 (mPGES-1) promoter. PMID: 24886859
  35. The authors report that de novo CENP-A assembly and kinetochore formation on human centromeric alphoid DNA arrays is regulated by a histone H3K9 acetyl/methyl balance. PMID: 22473132

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Database Links

HGNC: 4766

OMIM: 137800

KEGG: hsa:8350

STRING: 9606.ENSP00000444823

UniGene: Hs.132854

Involvement In Disease
Glioma (GLM)
Protein Families
Histone H3 family
Subcellular Location
Nucleus. Chromosome.

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