DNMT3B Antibody

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Description

Introduction to DNMT3B and DNMT3B Antibody

DNMT3B is a de novo DNA methyltransferase responsible for CpG methylation at centromeric repeats, germline genes, and intragenic regions to maintain genomic stability . Antibodies targeting DNMT3B facilitate:

  • Detection of protein expression levels in tissues/cell lines

  • Localization studies via immunohistochemistry (IHC) and immunofluorescence

  • Functional analyses through knockdown or overexpression experiments

Cancer Biology

In oral squamous cell carcinoma (OSCC):

  • DNMT3B overexpression correlates with lymph node metastasis (83% recurrence in DNMT3B+ vs. 46% in DNMT3B− cases)

  • Silencing DNMT3B reduces:

    • Tumor growth by 40-60% (in vitro and xenograft models)

    • Invasion capacity via EMT suppression (↓VEGF, ↓MMP-9, ↑E-cadherin)

Developmental Biology

  • Critical for maintaining methylation at germline gene promoters (e.g., interacts with E2F6 repressor)

  • Localizes to nuclei in BG01V embryonic stem cells, co-expressed with pluripotency marker SSEA-4

Clinical and Therapeutic Implications

ConditionDNMT3B DysregulationClinical Correlation
ICF SyndromeHypomorphic mutationsPericentromeric hypomethylation
Oral CancerOverexpressionShorter survival (Stage III-IV)
Breast CancerNuclear/cytoplasmic expressionTumor progression

Therapeutic strategies under investigation:

  • DNMT3B inhibitors: Reduce tumor growth and angiogenesis in preclinical models

  • Methylation profiling: DNMT3B activity correlates with IL-6 signaling, suggesting combinational targeting

Validation and Quality Control

Best practices for antibody validation include:

  • Knockout controls: AF7646 shows no signal in DNMT3B− HeLa cells

  • Multi-species cross-reactivity: BPS Bioscience’s antibody targets mouse DNMT3B isoforms

  • Application-specific optimization:

    • Antigen retrieval with 10 mM sodium citrate (pH 6.0) for IHC

    • 1:500–1:1000 dilution ranges for optimal signal-to-noise ratios

Product Specs

Form
Rabbit IgG in phosphate buffered saline (without Mg2+ and Ca2+), pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol.
Lead Time
We typically ship products within 1-3 business days of receiving your order. Delivery times may vary depending on the purchasing method and location. For specific delivery details, please consult your local distributor.
Synonyms
Cytosine 5methyltransferase 3B antibody; DNA antibody; DNA (cytosine 5) methyltransferase 3 beta antibody; DNA (cytosine 5)-methyltransferase 3B antibody; DNA (cytosine-5)-methyltransferase 3B antibody; DNA methyltransferase HsaIIIB antibody; DNA MTase HsaIIIB antibody; DNM3B_HUMAN antibody; Dnmt3b antibody; EC 2.1.1.37 antibody; ICF antibody; ICF1 antibody; M.HsaIIIB antibody; MGC124407 antibody; RP23-89H14.3 antibody
Target Names
DNMT3B
Uniprot No.

Target Background

Function
DNMT3B is crucial for genome-wide de novo methylation and plays a vital role in establishing DNA methylation patterns during development. DNA methylation is closely coordinated with histone methylation. DNMT3B preferentially methylates nucleosomal DNA within the nucleosome core region. It may function as a transcriptional co-repressor by interacting with CBX4, independent of DNA methylation. DNMT3B appears to be involved in gene silencing. In conjunction with DNMT1 and through the recruitment of CTCFL/BORIS, DNMT3B participates in the activation of BAG1 gene expression by modulating dimethylation of promoter histone H3 at H3K4 and H3K9. Isoforms 4 and 5 are likely non-functional due to the deletion of two conserved methyltransferase motifs. DNMT3B acts as a transcriptional corepressor by associating with ZHX1. It is essential for silencing DUX4 in somatic cells.
Gene References Into Functions
  1. A meta-analysis involving exclusively Chinese populations confirmed a significant association between the -579G>T polymorphism of DNMT3B and gastric cancer risk, but not lung cancer risk. The study found no significant association between the -149C>T polymorphism and the risk of lung or gastric cancer. Overall, the DNMT3B -579G>T polymorphism is associated with gastric cancer risk in the Chinese population. PMID: 29332452
  2. Among 9 candidate genes, GNB4 was identified and validated by qRT-PCR as a potential target silenced by DNA methylation via DNA methyltransferase 3B (DNMT3B). PMID: 30103729
  3. This research suggests a role for DNMT3B in leukemogenesis in inv(16) acute myeloid leukemia, through MN1 methylation regulation. PMID: 28892045
  4. Data indicate a role for DNA methyltransferase 3B (DNMT3B), suggesting that it might substitute for the absent accessory protein DNMT3L to recruit DNMT3A in somatic cells. PMID: 27121154
  5. These findings provide evidence that the DNMT3B -283T>C polymorphism might significantly contribute to the lung cancer risk in the Asian population but not the gastric cancer risk in the Chinese population. PMID: 29027179
  6. No significant difference in the distribution of DNMT3B -579 G>T genotypes was found between the cases and controls. PMID: 28220295
  7. The epigenetic targets AURKB, AURKC, and DNMT3B, and the global DNA methylation profile are regulated during HIV-1 replication in CD4+ T cells. This regulation can be influenced by the activation state of the cell at the time of infection. PMID: 30077875
  8. Data suggest that female patients carrying the rs2424932 or rs998382 variants of DNA methyltransferase 3b (DNMT3) were more likely to develop Parkinson's disease (PD) than female controls. PMID: 28990350
  9. This study expands the mutation spectrum in ICF syndrome and supports the notion that DNMT3B and ZBTB24 are the most common disease genes. PMID: 28128455
  10. An alternative splice variant of DNMT3B is associated with leukemia. PMID: 28730333
  11. These results provide a plausible link between the observed reduction of miR-26a and MEG3 in HCCs. Together, this study adds the miR-26a/DNMT3B/MEG3 axis to the complex mechanisms of HCC development. PMID: 28440439
  12. Results show that DNMT1 mRNA levels were significantly higher in alveolar rhabdomyosarcoma and embryonal rhabdomyosarcoma tumors compared to normal skeletal muscle. These data indicate that altered expression of DNMT3B plays a key role in embryonal rhabdomyosarcoma development since its silencing is able to reverse cell cancer phenotype by rescuing the myogenic program. PMID: 27764816
  13. The current study shows that DNMT3B rs2424913 promotor polymorphism represents a genetic risk factor that may play a significant role in understanding the pathogenesis of chronic immune thrombocytopenia. PMID: 27590349
  14. LMP1-mediated NF-kappaB can upregulate DNMT3b transcription, thereby leading to relatively higher methylation intensity at PTEN CpG islands and ultimately silencing the major tumor suppressor PTEN. PMID: 27223069
  15. This report presents the first crystal structure of the DNMT3B PWWP domain-H3K36me3 complex. PMID: 26993463
  16. Results continue to establish ANG as an oncoprotein and further reveal that ANG contributes to oncogenesis by the activation of MMP2 through modulation of DNMT3b functions. PMID: 27317771
  17. An association was found between DNMT3B rs2424913 in T allele carriers and Parkinson's disease. PMID: 28041964
  18. H19 might function as ceRNA (competing endogenous RNA) for miR-29b-3p and relieve the suppression for DNMT3B, which led to EMT and metastasis of bladder cancer (BC). Our findings highlight a novel mechanism of H19 in the progression of BC and provide the H19/miR-29b-3p/DNMT3B axis as a promising therapeutic target for BC. PMID: 28779971
  19. A novel homozygous missense mutation, Ala585Thr, was found in DNMT3B. PMID: 27734333
  20. Definitive diagnosis should be done using metaphase analysis to identify centromeric instability and/or ICF disease gene mutations analysis. Bilateral VUR may occur in ICF patients with homozygous DNMT3B mutations in early childhood. Renal ultrasonography should be included in ICF1 patients for the screening of congenital anomalies. PMID: 27604394
  21. DNMT 3B was upregulated in invasive subclones and exerted influence on E-cad gene methylation. PMID: 27391030
  22. Transduction of miR-339 and miR-766 expressing viruses into colon cancer cell lines (SW480 and HCT116) decreased DNMT3B expression (1.5, 3-fold) and (3, 4-fold), respectively. Additionally, DNA methylation of some tumor suppressor genes decreased. PMID: 27668319
  23. Immunodeficiency, centromere instability, and facial anomalies syndrome specific DNMT3B dysfunction interferes with intragenic regulation of mRNA transcription and alternative splicing. PMID: 28334849
  24. Nickel exposure results in DNMT3b induction and MEG3 promoter hypermethylation and expression inhibition, further reduces its binding to c-Jun and in turn increasing c-Jun inhibition of PHLPP1 transcription, leading to the Akt/p70S6K/S6 axis activation and HIF-1alpha protein translation, as well as malignant transformation of human bronchial epithelial cells. PMID: 28263966
  25. Overexpression of MAEL in UCB cells substantially enhanced the enrichment of DNA methyltrans-ferase (DNMT)3B and histone deacetylase (HDAC)1/2 on the promoter of the MTSS1, thereby epigenetically suppressing the MTSS1 transcription. PMID: 27181205
  26. Data suggest that the overexpression of DNMT3B4 may play a significant role in human kidney tumorigenesis through chromosomal instability and methylation of RASSF1A. PMID: 28160561
  27. Dnmt3b plays a tumor suppressive role in MLL-AF9 AML progression. PMID: 27133822
  28. Data indicated that Kaempferol is a novel DNMT3B inhibitor, which may promote the degradation of DNMT3B in bladder cancer. PMID: 28278502
  29. Findings suggest that PTEN and DNMT3B possess common regulation features as well as certain ethnic differences in expression between Han women and Uygur women. PMID: 28220037
  30. This condensed chromatin structure is associated with binding of DNMT3B and decreased occupancy of OCT1 transcription factor at MAML2 enhancer, suggesting a role of DNMT3B in increasing methylation of MAML2 after stilbenoid treatment. PMID: 27207652
  31. This study demonstrates that heterozygous mutations in DNA methyltransferase 3B (DNMT3B) are a likely cause of D4Z4 derepression associated with low levels of DUX4 expression. PMID: 27153398
  32. The DNMT3B 149C>T and -2437T>A polymorphisms are not correlated with lung cancer risk among Chinese populations, nor is the haplotype of them. PMID: 27876061
  33. mRNA and protein expression levels of DNMT3b were upregulated in genotype 1b and 3a HCV-infected hepatocellular carcinoma patients compared to the control. DNMT3b mRNA levels did not change in genotypes 2a, 3, and 4, but were upregulated at the protein level by genotype 1b, 2a, and 3a. No differences were seen for genotypes 5 and 7. PMID: 26850594
  34. Haplotype analysis reveals a strong association of the interaction of the DNMT3B gene with APOEepsilon4 in a sample of Alzheimer disease patients. PMID: 27188425
  35. DNMT3B Gene Polymorphism is associated with Gastric and Colorectal Cancer. PMID: 27356727
  36. Data show that microRNA miR-221 contributes to breast cancer tumorigenicity by regulating stemness, at least in part through the control of DNA methyltransferase 3B (DNMT3b) expression. PMID: 26556862
  37. Downregulation of DNMT3B, one of the targets identified using this method, radiosensitizes cancer cells by disturbing multiple DNA damage responses. PMID: 26667181
  38. Our results demonstrate DNMT3B4-del as a critical factor in developing aberrant DNA methylation patterns during lung tumorigenesis and suggest that DNMT3B4-del may be a target for lung cancer prevention. PMID: 26629529
  39. Results suggested that the DNMT3B -149C/T polymorphism is associated with a genetic susceptibility for developing LSCC in a Chinese population. PMID: 26505438
  40. Increasing DNA methylation in the gene-coding area of DNMT3B was associated with a higher risk of colorectal adenomas (OR = 1.34; 95% CI: 1.01-1.79 per SD). PMID: 27062459
  41. Deregulated Dnmt3b targets have prognostic impact in acute myeloid leukemia patients. PMID: 26729896
  42. The DNMT3B-579G>T polymorphism might contribute to the susceptibility of cancers, especially in the Asian population and for colorectal cancer. PMID: 26406961
  43. DNMT3b polymorphisms may predict long-term survival of gastric cancer. However, further studies are needed to reveal the underlying biological roles of the DNMT3b polymorphism. PMID: 26262893
  44. Our results suggest that DNA (cytosine-5-)-methyltransferase 3 beta polymorphism is involved in the development of colon cancer and non-random genes promoter methylation among the Iranian population. PMID: 25769449
  45. For DNMT3B, increasing DNA methylation of CpG sites in the gene-coding area was associated with a higher risk of colorectal adenomas. PMID: 26485042
  46. There were no significant differences in DNMT3b mRNA expression between patients with SLE and healthy controls. PMID: 25899090
  47. Results suggest that DNMT3B polymorphisms may explain variability in the IQ response to either enriched or impoverished environmental conditions. PMID: 25530201
  48. Activated IL-6 signaling might be responsible for the induction of DNMT3b overexpression in oral cancer. PMID: 24625449
  49. The inability to downregulate DNMT3B expression in endometriosis may contribute to an aberrant epigenetic fingerprint that misdirects gene expression in endometriosis and contributes to its altered response to steroid hormones. PMID: 26239024
  50. Low levels of miR-29c in the CSF were positively correlated with the protein expression of BDNF and negatively correlated with the protein expression of DNMT3 in patients with AD. PMID: 25815896

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Database Links

HGNC: 2979

OMIM: 158901

KEGG: hsa:1789

STRING: 9606.ENSP00000328547

UniGene: Hs.643024

Involvement In Disease
Immunodeficiency-centromeric instability-facial anomalies syndrome 1 (ICF1); Facioscapulohumeral muscular dystrophy 2 (FSHD2)
Protein Families
Class I-like SAM-binding methyltransferase superfamily, C5-methyltransferase family
Subcellular Location
Nucleus.
Tissue Specificity
Ubiquitous; highly expressed in fetal liver, heart, kidney, placenta, and at lower levels in spleen, colon, brain, liver, small intestine, lung, peripheral blood mononuclear cells, and skeletal muscle. Isoform 1 is expressed in all tissues except brain, s

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