Product: Phospho-CREB (Ser133) Antibody
Catalog: AF3189
Description: Rabbit polyclonal antibody to Phospho-CREB (Ser133)
Application: WB IHC IF/ICC
Reactivity: Human, Mouse, Rat
Prediction: Pig, Bovine, Horse, Sheep, Rabbit, Dog, Chicken, Xenopus
Mol.Wt.: 43kDa; 37kD(Calculated).
Uniprot: P16220
RRID: AB_2834621

View similar products>>

   Size Price Inventory
 100ul $280 In stock
 200ul $350 In stock

Lead Time: Same day delivery

For pricing and ordering contact:
Local distributors

Product Info

WB 1:500-1:2000, IHC 1:100-1:500, 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.

Pig(100%), Bovine(100%), Horse(100%), Sheep(100%), Rabbit(100%), Dog(100%), Chicken(100%), Xenopus(100%)
Phospho-CREB (Ser133) Antibody detects endogenous levels of CREB only when phosphorylated at Serine 133.
Cite Format: Affinity Biosciences Cat# AF3189, RRID:AB_2834621.
The antibody is from purified rabbit serum by affinity purification via sequential chromatography on phospho-peptide and non-phospho-peptide affinity columns.
Rabbit IgG in phosphate buffered saline , pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol. Store at -20 °C. Stable for 12 months from date of receipt.


Active transcription factor CREB; cAMP response element binding protein 1; cAMP response element binding protein; cAMP responsive element binding protein 1; cAMP-responsive element-binding protein 1; CREB; CREB-1; CREB1; CREB1_HUMAN; Cyclic AMP-responsive element-binding protein 1; MGC9284; OTTHUMP00000163864; OTTHUMP00000163865; OTTHUMP00000206660; OTTHUMP00000206662; OTTHUMP00000206667; Transactivator protein;


This gene encodes a transcription factor that is a member of the leucine zipper family of DNA binding proteins. This protein binds as a homodimer to the cAMP-responsive element, an octameric palindrome.



Score>80(red) has high confidence and is suggested to be used for WB detection. *The prediction model is mainly based on the alignment of immunogen sequences, the results are for reference only, not as the basis of quality assurance.

Model Confidence:
High(score>80) Medium(80>score>50) Low(score<50) No confidence

PTMs - P16220 As Substrate

Site PTM Type Enzyme
S40 Phosphorylation
S80 Phosphorylation
S98 Phosphorylation Q15139 (PRKD1)
T100 Phosphorylation Q13315 (ATM)
S108 Phosphorylation P68400 (CSNK2A1) , P48729 (CSNK1A1)
S111 Phosphorylation P68400 (CSNK2A1) , P48729 (CSNK1A1) , Q13315 (ATM)
S114 Phosphorylation P48729 (CSNK1A1)
S117 Phosphorylation
T119 Phosphorylation
S121 Phosphorylation Q13535 (ATR) , Q13315 (ATM)
S129 Phosphorylation P49841 (GSK3B)
S133 Phosphorylation Q16539 (MAPK14) , P31751 (AKT2) , Q02156 (PRKCE) , O43781 (DYRK3) , Q96NX5 (CAMK1G) , Q16566 (CAMK4) , P17612 (PRKACA) , Q6SA08 (TSSK4) , Q99986 (VRK1) , Q13557 (CAMK2D) , Q15418 (RPS6KA1) , O75676 (RPS6KA4) , P28482 (MAPK1) , Q14012 (CAMK1) , Q06187 (BTK) , P51812 (RPS6KA3) , Q13627 (DYRK1A) , O75582 (RPS6KA5) , P41279 (MAP3K8) , O00141 (SGK1) , P27361 (MAPK3) , P31749 (AKT1) , Q13315 (ATM) , Q15349 (RPS6KA2) , Q9Y243 (AKT3) , P49137 (MAPKAPK2) , Q15139 (PRKD1)
Y134 Phosphorylation
K136 Acetylation
K136 Ubiquitination
S142 Phosphorylation Q9UQM7 (CAMK2A) , Q13557 (CAMK2D)
S143 Phosphorylation
S156 Phosphorylation P48729 (CSNK1A1)
T256 Phosphorylation
S270 Phosphorylation P06493 (CDK1)
S271 Phosphorylation Q9H2X6 (HIPK2) , P06493 (CDK1)
K285 Sumoylation
K304 Sumoylation
K309 Ubiquitination
R314 Methylation
K323 Ubiquitination
K330 Ubiquitination
K333 Ubiquitination
K339 Ubiquitination
S340 Phosphorylation

Research Backgrounds


Phosphorylation-dependent transcription factor that stimulates transcription upon binding to the DNA cAMP response element (CRE), a sequence present in many viral and cellular promoters. Transcription activation is enhanced by the TORC coactivators which act independently of Ser-133 phosphorylation. Involved in different cellular processes including the synchronization of circadian rhythmicity and the differentiation of adipose cells.


Stimulated by phosphorylation. Phosphorylation of both Ser-133 and Ser-142 in the SCN regulates the activity of CREB and participates in circadian rhythm generation. Phosphorylation of Ser-133 allows CREBBP binding. In liver, phosphorylation is induced by fasting or glucagon in a circadian fashion (By similarity). CREBL2 positively regulates phosphorylation at Ser-133 thereby stimulating CREB1 transcriptional activity (By similarity). Phosphorylated upon calcium influx by CaMK4 and CaMK2 on Ser-133. CaMK4 is much more potent than CaMK2 in activating CREB. Phosphorylated by CaMK2 on Ser-142. Phosphorylation of Ser-142 blocks CREB-mediated transcription even when Ser-133 is phosphorylated. Phosphorylated by CaMK1 (By similarity). Phosphorylation of Ser-271 by HIPK2 in response to genotoxic stress promotes CREB1 activity, facilitating the recruitment of the coactivator CBP. Phosphorylated at Ser-133 by RPS6KA3, RPS6KA4 and RPS6KA5 in response to mitogenic or stress stimuli. Phosphorylated by TSSK4 on Ser-133.

Sumoylated with SUMO1. Sumoylation on Lys-304, but not on Lys-285, is required for nuclear localization of this protein. Sumoylation is enhanced under hypoxia, promoting nuclear localization and stabilization.

Subcellular Location:


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

Interacts with PPRC1. Binds DNA as a dimer. This dimer is stabilized by magnesium ions. Interacts, through the bZIP domain, with the coactivators TORC1/CRTC1, TORC2/CRTC2 and TORC3/CRTC3. When phosphorylated on Ser-133, binds CREBBP (By similarity). Interacts with CREBL2; regulates CREB1 phosphorylation, stability and transcriptional activity (By similarity). Interacts (phosphorylated form) with TOX3. Interacts with ARRB1. Binds to HIPK2. Interacts with SGK1. Interacts with TSSK4; this interaction facilitates phosphorylation on Ser-133. Forms a complex with KMT2A and CREBBP.

(Microbial infection) Interacts with hepatitis B virus/HBV protein X.

(Microbial infection) Interacts with HTLV-1 protein Tax.


Belongs to the bZIP family.

Research Fields

· Environmental Information Processing > Signal transduction > cGMP-PKG signaling pathway.   (View pathway)

· Environmental Information Processing > Signal transduction > cAMP signaling pathway.   (View pathway)

· Environmental Information Processing > Signal transduction > PI3K-Akt signaling pathway.   (View pathway)

· Environmental Information Processing > Signal transduction > AMPK signaling pathway.   (View pathway)

· Environmental Information Processing > Signal transduction > TNF signaling pathway.   (View pathway)

· Human Diseases > Endocrine and metabolic diseases > Insulin resistance.

· Human Diseases > Neurodegenerative diseases > Huntington's disease.

· Human Diseases > Substance dependence > Cocaine addiction.

· Human Diseases > Substance dependence > Amphetamine addiction.

· Human Diseases > Substance dependence > Alcoholism.

· Human Diseases > Infectious diseases: Bacterial > Tuberculosis.

· Human Diseases > Infectious diseases: Viral > Hepatitis B.

· Human Diseases > Infectious diseases: Viral > Human papillomavirus infection.

· Human Diseases > Infectious diseases: Viral > HTLV-I infection.

· Human Diseases > Cancers: Overview > Viral carcinogenesis.

· Human Diseases > Cancers: Specific types > Prostate cancer.   (View pathway)

· Organismal Systems > Aging > Longevity regulating pathway.   (View pathway)

· Organismal Systems > Circulatory system > Adrenergic signaling in cardiomyocytes.   (View pathway)

· Organismal Systems > Development > Osteoclast differentiation.   (View pathway)

· Organismal Systems > Immune system > Antigen processing and presentation.   (View pathway)

· Organismal Systems > Environmental adaptation > Circadian rhythm.   (View pathway)

· Organismal Systems > Environmental adaptation > Circadian entrainment.

· Organismal Systems > Nervous system > Cholinergic synapse.

· Organismal Systems > Nervous system > Dopaminergic synapse.

· Organismal Systems > Endocrine system > Insulin secretion.   (View pathway)

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

· Organismal Systems > Endocrine system > Melanogenesis.

· Organismal Systems > Endocrine system > Thyroid hormone synthesis.

· Organismal Systems > Endocrine system > Glucagon signaling pathway.

· Organismal Systems > Endocrine system > Renin secretion.

· Organismal Systems > Endocrine system > Aldosterone synthesis and secretion.

· Organismal Systems > Endocrine system > Relaxin signaling pathway.

· Organismal Systems > Excretory system > Vasopressin-regulated water reabsorption.


1). Qiao YL et al. Uncaria rhynchophylla ameliorates unpredictable chronic mild stress-induced depression in mice via activating 5-HT1A receptor: Insights from transcriptomics. PHYTOMEDICINE 2021 Jan;81:153436. (PubMed: 33360346) [IF=7.9]

Application: WB    Species: mice    Sample: hippocampus

Fig. 11. Effects of URE on 5-HT1A signaling pathway. (A) Western blotting analysis of 5-HT1A, BDNF, p-CREB, CREB, p-PKA, and PKA in hippocampus. (B-E) Quantitative data of 5-HT1A (B), BDNF (C), p-CREB/CREB (D), and p-PKA/PKA (E), data represent mean ± SEM (n = 3), ** p < 0.01, *** p < 0.001 vs. the control group; # p < 0.05, ## p < 0.01, ### p < 0.001 vs. the UCMS group. (F) The agonistic effect of URE against 5-HT1A receptor.

2). Ding Q et al. The critical role of ROS in Ermanin-induced melanogenesis. Free radical biology & medicine 2021 Sep 21;S0891-5849(21)00737-1. (PubMed: 34560247) [IF=7.4]

3). Peng Z et al. MiR-29b-3p aggravates NG108-15 cell apoptosis triggered by fluorine combined with aluminum. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021 Aug 20;224:112658. (PubMed: 34425535) [IF=6.8]

Application: WB    Species: Rat    Sample: NG108–15 cells

Fig. 4. mRNA and protein expression of Dusp2, p38 MAPK, CREB and JNK in NG108–15 cells treated with F, Al and FA. (A/B) The graphs show the results of the statistical analysis of Dusp2, p38 MAPK, CREB and JNK mRNA expression levels based on qRT-PCR. (C/D/E/F/G/H/I) The graphs show signaling pathway protein expression in NG108–15 cells as assessed by Western blotting analysis. a P < 0.05, compared with the control group; b P < 0.05, compared with the F group; c P < 0.05, compared with the Al group (n = 6).

4). Zhang X et al. Combined effects of di (2-ethylhexyl) phthalate and bisphenol A on thyroid hormone homeostasis in adolescent female rats. Environmental science and pollution research international 2020 Jul 17. (PubMed: 32681327) [IF=5.8]

Application: IHC    Species: rat    Sample: thyroid

Fig. 5| Effects of DEHP and BPA on relative gene expression in the thyroid (n = 7). a Immunohistochemistry for Esr1 in the thyroid(original magnification, × 20). Scale bar = 200 μm. b The average optical density of Esr1 in the thyroid. c The mRNA expression of Esr1.d Immunohistochemistry for phosphorylation of Creb in the thyroid(original magnification, × 20).

5). Han X et al. Metformin Modulates High Glucose-Incubated Human Umbilical Vein Endothelial Cells Proliferation and Apoptosis Through AMPK/CREB/BDNF Pathway. Frontiers in Pharmacology 2018 Nov 6;9:1266 (PubMed: 30459620) [IF=5.6]

Application: WB    Species: human    Sample: HUVECs

FIGURE 5 | BDNF expression was regulated by metformin through CREB activation. (A) Western blot analysis of CREB and pCREB expression in HUVECs treated with NG, HG (33.3 mmol/l), and HG + MET (0.01 mmol/l) conditions. Histograms represent the relative pCREB/CREB intensity.

6). Wu J et al. Zhile Capsule Exerts Antidepressant-Like Effects through Upregulation of the BDNF Signaling Pathway and Neuroprotection. INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES 2019 Jan 8;20(1) (PubMed: 30625977) [IF=5.6]

Application: WB    Species: rat    Sample: hippocampus

Figure 6.| ZL activated cAMP-CREB-BDNF signaling. (A–C) Protein expressions of BDNF, p-CREB and CREB in the hippocampus at the end of experiment determined by western blotting.Quantified protein level was normalized to that of GAPDH using densitometry (n = 3)

7). Lin Y et al. Hypericum sampsonii attenuates inflammation in mice with ulcerative colitis via regulation of PDE4/PKA/CREB signaling pathway. Journal of Ethnopharmacology 2022 Jun 07; (PubMed: 35688258) [IF=5.4]

8). Sisi Li et al. Fibroblast growth factor 2 contributes to the effect of salidroside on dendritic and synaptic plasticity after cerebral ischemia/reperfusion injury. Aging (Albany NY) 2020 Jun 9;12. (PubMed: 32518214) [IF=5.2]

Application: WB    Species: rat    Sample:

Figure 6. |Sal upregulates the FGF2-mediated cAMP/PKA/CREB signaling pathway following MCAO/R. (A–G) Representative western blot bands of cAMP, PKA, CREB, p-CREB, FGF2 and FGFR1 in each group.

9). Ou J et al. Sinomenine Protects Against Morphine Dependence through the NMDAR1/CAMKII/CREB Pathway: A Possible Role of Astrocyte-Derived Exosomes. MOLECULES 2018 Sep 17;23(9) (PubMed: 30227624) [IF=4.6]

Application: WB    Species: mouse    Sample: SH-SY5Y cells

Figure 6. |Effects of astrocyte-derived exosomes on morphine-treated SH-SY5Y cells and subsequent intervention by sinomenine.(C–E) Effects of Sino-exo on p-NMDAR1/NMDAR1, p-CAMKII/CAMKII, and p-CREB/CREB induced by mor-exo in the morphine-treated SH-SY5Y cells (n = 3)

10). Wang C et al. β-Estradiol antagonizes the inhibitory effects of caffeine in BMMSCs via the ERβ-mediated cAMP-dependent PKA pathway. TOXICOLOGY 2018 Feb 1;394:1-10 (PubMed: 29154944) [IF=4.5]

Application: WB    Species: rat    Sample: BMMSCs

Fig. 6.|β-Estradiol antagonizes the caffeine-induced inhibition of osteogenesis by regulating the cAMP/PKA signaling pathway. The PKA activator IBMX and the PKA inhibitor H-89 were added to the culture media.(E) ALP activity, (F) cAMP, (G) CREB gene expression and (H) CREB protein phosphorylation levels were measured by spectrophotometry, ELISA, qRT-PCR, and western blot, respectively. Comparisons between groups were performed using ANOVA,n = 5; #P < 0.05, significantly different from the control group; *P < 0.05, significant difference between each group. ca: caffeine, es: β-estradiol.

Load more

Restrictive clause


Affinity Biosciences tests all products strictly. Citations are provided as a resource for additional applications that have not been validated by Affinity Biosciences. Please choose the appropriate format for each application and consult Materials and Methods sections for additional details about the use of any product in these publications.

For Research Use Only.
Not for use in diagnostic or therapeutic procedures. Not for resale. Not for distribution without written consent. Affinity Biosciences will not be held responsible for patent infringement or other violations that may occur with the use of our products. Affinity Biosciences, Affinity Biosciences Logo and all other trademarks are the property of Affinity Biosciences LTD.