Product Details

Uniprot No.

Target Names

ATF5

Alternative Names

Cyclic AMP-dependent transcription factor ATF-5 (cAMP-dependent transcription factor ATF-5) (Activating transcription factor 5) (Transcription factor ATFx), ATF5, ATFX

Species Reactivity

Human, Rat

Immunogen

A synthesized peptide derived from human ATF5

Immunogen Species

Homo sapiens (Human)

Conjugate

Non-conjugated

Clonality

Monoclonal

Isotype

Rabbit IgG

Clone No.

9D8

Purification Method

Affinity-chromatography

Concentration

It differs from different batches. Please contact us to confirm it.

Buffer

Rabbit IgG in 10mM phosphate buffered saline , pH 7.4, 150mM sodium chloride, 0.05% BSA, 0.02% sodium azide and 50% glycerol.

Form

Liquid

Tested Applications

ELISA, WB, IHC

Recommended Dilution

Application	Recommended Dilution
WB	1:500-1:5000
IHC	1:50-1:200

Protocols

ELISA Protocol
Western Blotting(WB) Protocol
Immunohistochemistry (IHC) Protocol

Troubleshooting and FAQs

Antibody FAQs

Storage

Upon receipt, store at -20°C or -80°C. Avoid repeated freeze.

Lead Time

Basically, we can dispatch the products out in 1-3 working days after receiving your orders. Delivery time maybe differs from different purchasing way or location, please kindly consult your local distributors for specific delivery time.

Description

ATF5 is a member of the ATF/CREB family of basic leucine zipper transcription factors that plays critical roles in cellular stress responses, differentiation, and survival signaling. This transcription factor has garnered significant research interest due to its involvement in neural development, adipocyte differentiation, and notably its overexpression in various cancer types, where it appears to promote cell survival under stress conditions. Understanding ATF5 regulation and expression patterns provides valuable insights into both normal cellular physiology and disease mechanisms.

This recombinant monoclonal antibody, generated from clone 9D8, offers the consistency and reliability that demanding research applications require. Because the antibody sequence is defined and produced recombinantly in rabbit host cells, researchers benefit from lot-to-lot reproducibility that ensures experimental results remain comparable across extended studies. The affinity-chromatography purification yields a high-quality reagent suitable for quantitative work.

Validation studies demonstrate robust performance across multiple experimental platforms. In western blot applications, the antibody successfully detects ATF5 in a diverse panel of human cell lines including HeLa, 293, Jurkat, SH-SY5Y, THP-1, and PC-3, as well as rat brain tissue, confirming cross-species reactivity between human and rat samples. The observed band at approximately 35 kDa runs slightly higher than the predicted 31 kDa molecular weight, which likely reflects post-translational modifications such as phosphorylation events known to regulate ATF5 activity. For immunohistochemistry, the antibody has been validated in paraffin-embedded human liver tissue using standard antigen retrieval protocols.

This antibody serves researchers investigating epigenetics, nuclear signaling pathways, stress response mechanisms, and cancer biology where ATF5 dysregulation may contribute to disease progression.

Usage

For Research Use Only. Not for use in diagnostic or therapeutic procedures.

Related Products

Target Background

Function

Transcription factor that either stimulates or represses gene transcription through binding of different DNA regulatory elements such as cAMP response element (CRE) (consensus: 5'-GTGACGT[AC][AG]-3'), ATF5-specific response element (ARE) (consensus: 5'-C[CT]TCT[CT]CCTT[AT]-3') but also the amino acid response element (AARE), present in many viral and cellular promoters. Critically involved, often in a cell type-dependent manner, in cell survival, proliferation, and differentiation. Its transcriptional activity is enhanced by CCND3 and slightly inhibited by CDK4. Important regulator of the cerebral cortex formation, functions in cerebral cortical neuroprogenitor cells to maintain proliferation and to block differentiation into neurons. Must be down-regulated in order for such cells to exit the cycle and differentiate. Participates in the pathways by which SHH promotes cerebellar granule neuron progenitor cells proliferation. Critical for survival of mature olfactory sensory neurons (OSN), directs expression of OSN-specific genes. May be involved in osteogenic differentiation. Promotes cell proliferation and survival by inducing the expression of EGR1 sinergistically with ELK1. Once acetylated by EP300, binds to ARE sequences on target genes promoters, such as BCL2 and EGR1. Plays an anti-apoptotic role through the transcriptional regulation of BCL2, this function seems to be cell type-dependent. Cooperates with NR1I3/CAR in the transcriptional activation of CYP2B6 in liver. In hepatic cells, represses CRE-dependent transcription and inhibits proliferation by blocking at G2/M phase. May act as a negative regulator of IL1B transduction pathway in liver. Upon IL1B stimulus, cooperates with NLK to activate the transactivation activity of C/EBP subfamily members. Besides its function of transcription factor, acts as a cofactor of CEBPB to activate CEBPA and promote adipocyte differentiation. Regulates centrosome dynamics in a cell-cycle- and centriole-age-dependent manner. Forms 9-foci symmetrical ring scaffold around the mother centriole to control centrosome function and the interaction between centrioles and pericentriolar material.

Gene References into Functions

Data suggest that ATF5 is modified by SUMO2/3 at a conserved SUMO-targeting consensus site; this SUMOylation of ATF5 appears to be required for transport of ATF5 to centrosome. (ATF5 = activating transcription factor-5; SUMO = small ubiquitin-like modifier) PMID: 29326161
Study reports that reduced levels of ATF5 in brain of Huntington's disease patients, probably due to its sequestration into the characteristic PolyQ containing neuronal inclusion bodies, correlates with decreased levels of the antiapoptotic protein MCL1, a transcriptional target of ATF5. Also provides evidence of decreased ATF5 being deleterious by rendering neurons more vulnerable to polyQ-induced apoptosis. PMID: 28861715
ATF5 expression can rescue UPR(mt) signaling in atfs-1-deficient worms requiring the same UPR(mt) promoter element identified in C. elegans. Furthermore, mammalian cells require ATF5 to maintain mitochondrial activity during mitochondrial stress and promote organelle recovery. Combined, these data suggest that regulation of the UPR(mt) is conserved from worms to mammals. PMID: 27426517
Our results suggest that ATF5 promotes invasion by inducing the expression of integrin-alpha2 and integrin-beta1 in several human cancer cell lines. PMID: 27125458
This study provides the first evidence that the methylation level of ATF5 decreased, and its mRNA expression was evidently up-regulated in glioma. PMID: 26365117
These results suggest that the hepatic functions of the human iPS-HLCs could be enhanced by ATF5, c/EBPalpha, and PROX1 transduction. PMID: 26679606
Activating transcription factor 5 enhances radioresistance and malignancy in cancer. PMID: 25682872
Data show that ATF5 is an essential structural protein that is required for the interaction between the mother centriole and the pericentriolar material. PMID: 26213385
Low expression level of ATF5 in hepatocellular carcinoma indicated aggressive tumor behavior and predicted a worse clinical outcome. PMID: 25294425
Report a global loss of 5hmC identified three new genes (ECM1, ATF5, and EOMES) with potential anti-cancer functions that may promote the understanding of the molecular mechanisms of hepatocellular carcinoma development and progression. PMID: 25517360
the TAK1-NLK pathway is a novel regulator of basal or IL-1beta-triggered C/EBP activation though stabilization of ATF5 PMID: 25512613
ATF5 promotes the proliferation of HSV-1 via a potential mechanism by which ATF5 enhances the transcription of viral genes during the course of an HSV-1 infection PMID: 24302293
N-terminal hydrophobic amino acids play an important role in the regulation of ATF5 protein expression in IL-1beta-mediated immune response and that ATF5 is a negative regulator for IL-1beta-induced expression of SAA1 and SAA2 in HepG2 cells. PMID: 24379400
The 5'-untranslated region regulates ATF5 mRNA stability via nonsense-mediated mRNA decay in response to environmental stress. PMID: 23876217
demonstrated that interference with the function of ATF5 could markedly increase the apoptosis of ovarian cancer cells and identified B-cell leukemia lymphoma-2 as an ATF5-targeted apoptosis-related gene PMID: 23018213
The evidence suggests a role for ATF5 in the regulation of osteogenic differentiation in adipose-derived stem cells. PMID: 22442021
a mechanistic link between elevated NPM1 expression and depressed ATF5 in HCC and suggests that regulation of ATF5 by NPM1 plays an important role in the proliferation and survival of HCC. PMID: 22528486
ATF5 polymorphisms influence ATF function and response to treatment in children with childhood acute lymphoblastic leukemia. PMID: 21972289
coordinated actions by ATF5, p300, Elk-1, and ERK/mitogen-activated protein kinase are essential for ATF5-dependent Egr-1 activation and cell proliferation and survival PMID: 21791614
an essential role for HSP70 in maintaining high levels of ATF5 expression in glioma cells and support the conclusion that ATF5 is an important substrate protein of HSP70 that mediates HSP70-promoted cell survival in glioma cells. PMID: 21521685
BCL-2 is an essential mediator for the cancer-specific cell survival function of ATF5 in glioblastoma and breast cancer cells PMID: 21212266
our studies not only provided molecular basis of ATF5 transcriptional regulation, but also identified ATF5 as a target gene of EBF1 transcription factor. PMID: 20423929
activating transcription factor 5 (ATF5) is a new interacting partner of cyclin D3 PMID: 15358120
recruitment of ATFx to the HTLV-1 LTR serves to link viral transcription with critical events in cellular homeostasis PMID: 15890932
Overexpression of the bZIP protein ATF5, a transcriptional activator, stimulates asparagine synthetase promoter/reporter gene transcription via the nutrient-sensing response unit. PMID: 16164412
The widespread expression of ATF5 in glioblastomas PMID: 16170340
ATF5 increases cisplatin-induced apoptosis through up-regulation of Cyclin D3 transcription, which elicits survival signals in HeLa cells PMID: 16300731
Contribution of common variations of ATF4 and ATF5 to the pathophysiology of bipolar disorder may be minimal if any. PMID: 17346882
translation of ATF5 is regulated by the alternative 5'-UTR region of its mRNA, and ATF5 may play a role in protecting cells from amino acid limitation or arsenite-induced oxidative stress PMID: 18055463
ATF4 contributes to basal ATF5 transcription, and eIF2 kinases direct the translational expression of multiple transcription regulators by a mechanism involving delayed translation reinitiation PMID: 18195013
ATF5 is abundant in the liver, activates CYP2B6, and cooperates with the constitutive androstane receptor in sustaining the hepatic-specific expression of this P450 in human hepatocytes and hepatoma cells. PMID: 18332083
cisplatin increased ATF5 protein expression via preventing its ubiquitin-dependent degradation, which might be associated with its promoting the nucleus-to-cytoplasm translocation of E2 ubiquitin-conjugating enzyme Cdc34 PMID: 18458088
Loss of ATF5 is associated with hepatocellular carcinoma PMID: 18701499
The down-regulation of the SAP gene by ATF5 may represent a common mechanism for the pathogenesis of Hemophagocytic syndrome that is associated with either Epstein-Barr virus infection or immune disorders with dysregulated T-cell activation. PMID: 18832568
These results indicate that ATF5 is targeted for degradation by the ubiquitin-proteasome pathway, and that cadmium slows the rate of ATF5 degradation via a post-ubiquitination mechanism. PMID: 19285020
Identified a novel ATF5 consensus DNA binding sequence. Demonstrate in C6 glioma and MCF-7 breast cancer cells that ATF5 occupies this sequence and that ATF5 activates reporter gene expression driven by this site. PMID: 19531563

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Subcellular Location

Cytoplasm. Nucleus. Cytoplasm, cytoskeleton, microtubule organizing center, centrosome.

Protein Families

BZIP family

Tissue Specificity

Widely expressed with higher expression levels in liver.

Database Links

HGNC: 790

OMIM: 606398

KEGG: hsa:22809

STRING: 9606.ENSP00000396954

UniGene: Hs.9754

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Code	CSB-RA180846A0HU
Size	US$210
	Order now
Image	Western Blot Positive WB detected in: Hela whole cell lysate, 293 whole cell lysate, Jurkat whole cell lysate, SH-SY5Y whole cell lysate, THP-1 whole cell lysate, PC-3 whole cell lysate, Rat brain tissue All lanes: ATF5 antibody at 1:2000 Secondary Goat polyclonal to rabbit IgG at 1/50000 dilution Predicted band size: 31 kDa Observed band size: 35 kDa IHC image of CSB-RA180846A0HU diluted at 1:100 and staining in paraffin-embedded human liver tissue performed on a Leica BondTM system. After dewaxing and hydration, antigen retrieval was mediated by high pressure in a citrate buffer (pH 6.0). Section was blocked with 10% normal goat serum 30min at RT. Then primary antibody (1% BSA) was incubated at 4℃ overnight. The primary is detected by a Goat anti-rabbit IgG polymer labeled by HRP and visualized using 0.05% DAB.
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ATF5 Recombinant Monoclonal Antibody

Product Details

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Target Background