Product: HIF1 alpha Mouse monoclonal Antibody
Catalog: BF8002
Description: Mouse monoclonal antibody to HIF1 alpha
Application: WB IHC IF/ICC
Reactivity: Mouse
Mol.Wt.: 120kDa; 93kD(Calculated).
Uniprot: Q16665
RRID: AB_2846221

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Product Info

WB 1:500-1:2000, IHC 1:50-1:200, IF/ICC 1:100-1:500
*The optimal dilutions should be determined by the end user.

WB: For western blot detection of denatured protein samples. IHC: For immunohistochemical detection of paraffin sections (IHC-p) or frozen sections (IHC-f) of tissue samples. IF/ICC: For immunofluorescence detection of cell samples. ELISA(peptide): For ELISA detection of antigenic peptide.

Monoclonal [AFfirm8002(AFB17813)]
HIF1 alpha mouse monoclonal antibody detects endogenous levels of HIF1a.
Cite Format: Affinity Biosciences Cat# BF8002, RRID:AB_2846221.
The ascites was purified by peptide affinity chromatography using SulfoLink™ Coupling Resin (Thermo Fisher Scientific).
Mouse IgG in phosphate buffered saline , pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol.Stable for 15 months from date of receipt. Store at -20 °C. Stable for 12 months from date of receipt.


ARNT interacting protein; ARNT-interacting protein; Basic helix loop helix PAS protein MOP1; Basic-helix-loop-helix-PAS protein MOP1; bHLHe78; Class E basic helix-loop-helix protein 78; HIF 1A; HIF 1alpha; HIF-1-alpha; HIF1 A; HIF1 Alpha; HIF1; HIF1-alpha; HIF1A; HIF1A_HUMAN; Hypoxia inducible factor 1 alpha; Hypoxia inducible factor 1 alpha isoform I.3; Hypoxia inducible factor 1 alpha subunit; Hypoxia inducible factor 1 alpha subunit basic helix loop helix transcription factor; Hypoxia inducible factor 1, alpha subunit (basic helix loop helix transcription factor); Hypoxia inducible factor1alpha; Hypoxia-inducible factor 1-alpha; Member of PAS protein 1; Member of PAS superfamily 1; Member of the PAS Superfamily 1; MOP 1; MOP1; PAS domain-containing protein 8; PASD 8; PASD8;



A synthesized peptide derived from human HIF1a.


Expressed in most tissues with highest levels in kidney and heart. Overexpressed in the majority of common human cancers and their metastases, due to the presence of intratumoral hypoxia and as a result of mutations in genes encoding oncoproteins and tumor suppressors. A higher level expression seen in pituitary tumors as compared to the pituitary gland.

Cell growth and viability is compromised by oxygen deprivation (hypoxia). Hypoxia-inducible factors, including HIF-1α, Arnt 1 (also designated HIF-1β), EPAS-1 (also designated HIF-2α) and HIF-3α, induce glycolysis, erythropoiesis and angiogenesis in order to restore oxygen homeostasis. Hypoxia-inducible factors are members of the Per-Arnt-Sim (PAS) domain transcription factor family.

PTMs - Q16665 As Substrate

Site PTM Type Enzyme
K10 Acetylation
K10 Sumoylation
K11 Acetylation
K12 Acetylation
K19 Acetylation
K21 Acetylation
S31 Phosphorylation
K32 Ubiquitination
T63 Phosphorylation
Y66 Phosphorylation
K71 Ubiquitination
K85 Ubiquitination
S113 Phosphorylation
K172 Ubiquitination
K185 Sumoylation
K185 Ubiquitination
S247 Phosphorylation P48730 (CSNK1D)
K251 Ubiquitination
Y276 Phosphorylation
K289 Ubiquitination
K297 Ubiquitination
K377 Ubiquitination
K389 Acetylation
K389 Ubiquitination
K391 Methylation
K391 Sumoylation
K391 Ubiquitination
S451 Phosphorylation
T455 Phosphorylation
T458 Phosphorylation
K460 Ubiquitination
S465 Phosphorylation
K477 Sumoylation
K477 Ubiquitination
C520 S-Nitrosylation
K532 Acetylation
K532 Ubiquitination
K538 Ubiquitination
K547 Ubiquitination
S551 Phosphorylation
T555 Phosphorylation
Y565 Phosphorylation
S576 Phosphorylation Q9H4B4 (PLK3)
S589 Phosphorylation
K636 Ubiquitination
S641 Phosphorylation P28482 (MAPK1) , P27361 (MAPK3)
S643 Phosphorylation P28482 (MAPK1) , P27361 (MAPK3)
K649 Ubiquitination
T651 Phosphorylation
T652 Phosphorylation
S653 Phosphorylation
S656 Phosphorylation
S657 Phosphorylation Q9H4B4 (PLK3)
S668 Phosphorylation P06493 (CDK1)
K674 Acetylation
K674 Ubiquitination
K682 Ubiquitination
S683 Phosphorylation
S687 Phosphorylation
S692 Phosphorylation
S696 Phosphorylation Q13315 (ATM)
T700 Phosphorylation
K709 Acetylation
K709 Ubiquitination
K721 Ubiquitination
S727 Phosphorylation
S760 Phosphorylation
S761 Phosphorylation
K769 Ubiquitination
T796 Phosphorylation
S797 Phosphorylation Q5S007 (LRRK2)
C800 S-Nitrosylation
S809 Phosphorylation

Research Backgrounds


Functions as a master transcriptional regulator of the adaptive response to hypoxia. Under hypoxic conditions, activates the transcription of over 40 genes, including erythropoietin, glucose transporters, glycolytic enzymes, vascular endothelial growth factor, HILPDA, and other genes whose protein products increase oxygen delivery or facilitate metabolic adaptation to hypoxia. Plays an essential role in embryonic vascularization, tumor angiogenesis and pathophysiology of ischemic disease. Heterodimerizes with ARNT; heterodimer binds to core DNA sequence 5'-TACGTG-3' within the hypoxia response element (HRE) of target gene promoters (By similarity). Activation requires recruitment of transcriptional coactivators such as CREBBP and EP300. Activity is enhanced by interaction with both, NCOA1 or NCOA2. Interaction with redox regulatory protein APEX seems to activate CTAD and potentiates activation by NCOA1 and CREBBP. Involved in the axonal distribution and transport of mitochondria in neurons during hypoxia.


S-nitrosylation of Cys-800 may be responsible for increased recruitment of p300 coactivator necessary for transcriptional activity of HIF-1 complex.

Requires phosphorylation for DNA-binding. Phosphorylation at Ser-247 by CSNK1D/CK1 represses kinase activity and impairs ARNT binding. Phosphorylation by GSK3-beta and PLK3 promote degradation by the proteasome.

Sumoylated; with SUMO1 under hypoxia. Sumoylation is enhanced through interaction with RWDD3. Both sumoylation and desumoylation seem to be involved in the regulation of its stability during hypoxia. Sumoylation can promote either its stabilization or its VHL-dependent degradation by promoting hydroxyproline-independent HIF1A-VHL complex binding, thus leading to HIF1A ubiquitination and proteasomal degradation. Desumoylation by SENP1 increases its stability amd transcriptional activity. There is a disaccord between various publications on the effect of sumoylation and desumoylation on its stability and transcriptional activity.

Acetylation of Lys-532 by ARD1 increases interaction with VHL and stimulates subsequent proteasomal degradation. Deacetylation of Lys-709 by SIRT2 increases its interaction with and hydroxylation by EGLN1 thereby inactivating HIF1A activity by inducing its proteasomal degradation.

Polyubiquitinated; in normoxia, following hydroxylation and interaction with VHL. Lys-532 appears to be the principal site of ubiquitination. Clioquinol, the Cu/Zn-chelator, inhibits ubiquitination through preventing hydroxylation at Asn-803. Ubiquitinated by a CUL2-based E3 ligase.

In normoxia, is hydroxylated on Pro-402 and Pro-564 in the oxygen-dependent degradation domain (ODD) by EGLN1/PHD2 and EGLN2/PHD1. EGLN3/PHD3 has also been shown to hydroxylate Pro-564. The hydroxylated prolines promote interaction with VHL, initiating rapid ubiquitination and subsequent proteasomal degradation. Deubiquitinated by USP20. Under hypoxia, proline hydroxylation is impaired and ubiquitination is attenuated, resulting in stabilization. In normoxia, is hydroxylated on Asn-803 by HIF1AN, thus abrogating interaction with CREBBP and EP300 and preventing transcriptional activation. This hydroxylation is inhibited by the Cu/Zn-chelator, Clioquinol. Repressed by iron ion, via Fe(2+) prolyl hydroxylase (PHD) enzymes-mediated hydroxylation and subsequent proteasomal degradation.

The iron and 2-oxoglutarate dependent 3-hydroxylation of asparagine is (S) stereospecific within HIF CTAD domains.

Subcellular Location:

Cytoplasm. Nucleus. Nucleus speckle.
Note: Colocalizes with HIF3A in the nucleus and speckles (By similarity). Cytoplasmic in normoxia, nuclear translocation in response to hypoxia (PubMed:9822602).

Extracellular region or secreted Cytosol Plasma membrane Cytoskeleton Lysosome Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertionSubcellular location
Tissue Specificity:

Expressed in most tissues with highest levels in kidney and heart. Overexpressed in the majority of common human cancers and their metastases, due to the presence of intratumoral hypoxia and as a result of mutations in genes encoding oncoproteins and tumor suppressors. A higher level expression seen in pituitary tumors as compared to the pituitary gland.

Subunit Structure:

Interacts with the ARNT; forms a heterodimer that binds core DNA sequence 5'-TACGTG-3' within the hypoxia response element (HRE) of target gene promoters. Interacts with COPS5; the interaction increases the transcriptional activity of HIF1A through increased stability (By similarity). Interacts with EP300 (via TAZ-type 1 domains); the interaction is stimulated in response to hypoxia and inhibited by CITED2. Interacts with CREBBP (via TAZ-type 1 domains). Interacts with NCOA1, NCOA2, APEX and HSP90. Interacts (hydroxylated within the ODD domain) with VHLL (via beta domain); the interaction, leads to polyubiquitination and subsequent HIF1A proteasomal degradation. During hypoxia, sumoylated HIF1A also binds VHL; the interaction promotes the ubiquitination of HIF1A. Interacts with SENP1; the interaction desumoylates HIF1A resulting in stabilization and activation of transcription. Interacts (Via the ODD domain) with ARD1A; the interaction appears not to acetylate HIF1A nor have any affect on protein stability, during hypoxia. Interacts with RWDD3; the interaction enhances HIF1A sumoylation. Interacts with TSGA10 (By similarity). Interacts with HIF3A (By similarity). Interacts with RORA (via the DNA binding domain); the interaction enhances HIF1A transcription under hypoxia through increasing protein stability. Interaction with PSMA7 inhibits the transactivation activity of HIF1A under both normoxic and hypoxia-mimicking conditions. Interacts with USP20. Interacts with RACK1; promotes HIF1A ubiquitination and proteasome-mediated degradation. Interacts (via N-terminus) with USP19. Interacts with SIRT2. Interacts (deacetylated form) with EGLN1. Interacts with CBFA2T3. Interacts with HSP90AA1 and HSP90AB1.


Contains two independent C-terminal transactivation domains, NTAD and CTAD, which function synergistically. Their transcriptional activity is repressed by an intervening inhibitory domain (ID).

Research Fields

· Cellular Processes > Transport and catabolism > Autophagy - animal.   (View pathway)

· Environmental Information Processing > Signal transduction > HIF-1 signaling pathway.   (View pathway)

· Human Diseases > Cancers: Overview > Pathways in cancer.   (View pathway)

· Human Diseases > Cancers: Overview > Proteoglycans in cancer.

· Human Diseases > Cancers: Specific types > Renal cell carcinoma.   (View pathway)

· Human Diseases > Cancers: Overview > Central carbon metabolism in cancer.   (View pathway)

· Human Diseases > Cancers: Overview > Choline metabolism in cancer.   (View pathway)

· Organismal Systems > Immune system > Th17 cell differentiation.   (View pathway)

· Organismal Systems > Endocrine system > Thyroid hormone signaling pathway.   (View pathway)


1). Liu H et al. Psychologic Stress Drives Progression of Malignant Tumors via DRD2/HIF1α Signaling. CANCER RESEARCH 2021 Oct 15;81(20):5353-5365. (PubMed: 34321238) [IF=11.2]

Application: WB    Species: Mice    Sample: bladder tissues

Figure 6 Nrf2 might protect bladder injury by activating its downstream antioxidant genes. (a) The protein expression of HO-1 in the bladder of the four groups. (b) The protein expression of NQO1 in the bladder of the four groups. Relative mRNA expression levels of HO-1 (c) and NQO1 (d) in the bladder of the four groups. ∗P < 0.05, ∗∗P < 0.01. Data are presented as mean ± SD.

Application: IHC    Species: mouse    Sample: tumor cells

Fig. 6. |TFP inhibits EMT of melanoma cells.D–F, IHC analysis of E-cadherin, vimentin, HIF1α, VEGFA, and Twist1 in melanoma tumor tissues of mice under stress stimulation. Representative images and staining scores are shown. Scale bar, 100 μm.

Application: WB    Species: mouse    Sample:

Fig. 4 |DRD2 overexpression inhibited the ubiquitin-dependent degradation of HIF1α. A, Venn diagram of proteins that interacted with DRD2 and HIF1α, as predicted by FPclass website. B, Molecular docking results of DRD2 and VHL. C, Co-IP results of DRD2 and HIF1α.

2). Wang T et al. Spatiotemporal regulation of injectable heterogeneous silk gel scaffolds for accelerating guided vertebral repair. Advanced Healthcare Materials 2022 Dec 5;e2202210. (PubMed: 36465008) [IF=10.0]

3). Chen H et al. Low-dose X-ray irradiation combined with FAK inhibitors improves the immune microenvironment and confers sensitivity to radiotherapy in pancreatic cancer. BIOMEDICINE & PHARMACOTHERAPY 2022 Jul;151:113114. (PubMed: 35594704) [IF=7.5]

4). Zhu X et al. Aluminum induces neuroinflammation via P2X7 receptor activating NLRP3 inflammasome pathway. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023 Jan 1;249:114373. (PubMed: 36508838) [IF=6.8]

5). Song Y et al. Metformin alleviates the cognitive impairment caused by aluminum by improving energy metabolism disorders in mice. BIOCHEMICAL PHARMACOLOGY 2022 Aug;202:115140. (PubMed: 35700760) [IF=5.8]

6). Xu Y et al. Hypoxic Cell-Derived Extracellular Vesicles Aggravate Rectal Injury Following Radiotherapy via MiR-122-5p. Frontiers in Cell and Developmental Biology 2022 Apr 26;10:892575. (PubMed: 35557942) [IF=5.5]

7). Mao X et al. Hypoxia-Induced Autophagy Enhances Cisplatin Resistance in Human Bladder Cancer Cells by Targeting Hypoxia-Inducible Factor-1α. Journal of Immunology Research 2021 Feb 17;2021:8887437. (PubMed: 33681390) [IF=4.1]

Application: WB    Species: Human    Sample: Bladder Cancer Cells

Figure 5 Expression of related marker proteins and genes under normoxic and hypoxic conditions by Western blotting. (a) Beclin-1 was measured by immunoblotting under normoxia and hypoxia. (b) Caspase-3 was measured by immunoblotting when incubated with HIF-1α inhibitor YC-1. The results indicate that hypoxia might induce cell chemoresistance through the HIF-1α signaling pathway. (c) Beclin-1 was measured by immunoblotting under normoxia and hypoxia. (d) Atg5 was measured by Western blotting and showed a similar trend to caspase-3. (e) HIF-1α was measured with Western blotting. The result revealed that HIF was involved in targeting apoptosis induced by autophagy.

8). Pastushenkov VL et al. HIF-1α as a Target Molecule in the Use of Triazino-Indole Derivative on the Acoustic Trauma Model. Audiology Research 2021 Jul 15;11(3):365-372. (PubMed: 34287237) [IF=1.7]

Application: IHC    Species: Mouse    Sample: hair cells

Figure 1. Absence of HIF-1 expression in the cells of the receptor apparatus, low HIF-1 expression in the cells of the spiral ganglion (left): control group, (right): Cytoflavin.

9). Liu H et al. Upregulation of the long noncoding RNA UBOX5 antisense RNA 1 (UBOX5-AS1) under hypoxic conditions promotes epithelial-mesenchymal transition in endometriosis. Annals of Translational Medicine 2021 May;9(9):790. (PubMed: 34268403)

Application: WB    Species: Human    Sample: endometrial epithelial cells

Figure 1 The expression of lncRNA-UBOX5-AS1, HIF-1α, E-cadherin, and vimentin in the ectopic endometrium of endometriosis. (A) Real-time polymerase chain reaction (RT-PCR) showed that expression of lncRNA-UBOX5-AS1 was increased in ectopic endometrium tissues of endometriosis. (B,C) Representative western blotting analysis showing HIF-1α, E-cadherin, and vimentin protein expression in the different types of endometrium. β-actin was used as an internal loading control. *P<0.05; **P<0.01. lncRNA-UBOX5-AS1, long noncoding RNA UBOX antisense RNA 1; HIF-1α, hypoxia-inducible factor-1α.

10). Liu et al. Aluminum Induced Oxidative Metabolism Disorder to Activate Nlrp3 Inflammasome Through Hif-1α-Pkm2-C-Myc-Clic4 Pathway.

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