Recombinant Human Cyclic Amp-Responsive Element-Binding Protein 1 (CREB1) Protein (His)

Name: Recombinant Human Cyclic Amp-Responsive Element-Binding Protein 1 (CREB1) Protein (His)
Brand: Beta LifeScience
SKU: BLC-04417P
Availability: InStock

Greater than 90% as determined by SDS-PAGE.

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Product Overview

Description	Recombinant Human Cyclic Amp-Responsive Element-Binding Protein 1 (CREB1) Protein (His) is produced by our E.coli expression system. This is a full length protein.
Purity	Greater than 90% as determined by SDS-PAGE.
Uniprotkb	P16220
Target Symbol	CREB1
Synonyms	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
Species	Homo sapiens (Human)
Expression System	E.coli
Tag	N-6His
Target Protein Sequence	MTMESGAENQQSGDAAVTEAENQQMTVQAQPQIATLAQVSMPAAHATSSAPTVTLVQLPNGQTVQVHGVIQAAQPSVIQSPQVQTVQSSCKDLKRLFSGTQISTIAESEDSQESVDSVTDSQKRREILSRRPSYRKILNDLSSDAPGVPRIEEEKSEEETSAPAITTVTVPTPIYQTSSGQYIAITQGGAIQLANNGTDGVQGLQTLTMTNAAATQPGTTILQYAQTTDGQQILVPSNQVVVQAASGDVQTYQIRTAPTSTIAPGVVMASSPALPTQPAEEAARKREVRLMKNREAARECRRKKKEYVKCLENRVAVLENQNKTLIEELKALKDLYCHKSD
Expression Range	1-341aa
Protein Length	Full Length
Mol. Weight	40.7kDa
Research Area	Immunology
Form	Liquid or Lyophilized powder
Buffer	Liquid form: default storage buffer is Tris/PBS-based buffer, 5%-50% glycerol. Lyophilized powder form: the buffer before lyophilization is Tris/PBS-based buffer, 6% Trehalose, pH 8.0.
Reconstitution	Briefly centrifuged the vial prior to opening to bring the contents to the bottom. Reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL. It is recommended to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20°C/-80°C. The default final concentration of glycerol is 50%.
Storage	1. Store at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. 2. Avoid repeated freeze-thaw cycles. 3. Store working aliquots at 4°C for up to one week. 4. In general, protein in liquid form is stable for up to 6 months at -20°C/-80°C. Protein in lyophilized powder form is stable for up to 12 months at -20°C/-80°C.
Notes	Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.

Target Details

Target Function	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-119 phosphorylation. Involved in different cellular processes including the synchronization of circadian rhythmicity and the differentiation of adipose cells.
Subcellular Location	Nucleus.
Protein Families	BZIP family
Database References	HGNC: 2345 OMIM: 123810 KEGG: hsa:1385 STRING: 9606.ENSP00000387699 UniGene: PMID: 29633065 CacyBP expression is regulated by E2F1, EGR1, and CREB transcription factors in colorectal cancer HCT116 cells. PMID: 29197151 ethanol-induced eIF2alpha phosphorylation stimulates COX-2 expression and PGE2 production which induces the BACE1 expression and Abeta production via EP-2 receptor-dependent PKA/CREB pathway. PMID: 28668332 Creb1/Crtc1-3 and Sec14l3 could be important for early responses of the bronchial epithelium to Th2-stimuli. PMID: 28383034 CREB1 overexpression rescued the effects on gastric cancer cell growth induced by miR-1297. PMID: 29870889 Results suggest that low nuclear cyclic AMP responsive element binding protein (pCREB) expression in the primary lesion is significant risk factor for metastatic melanoma. PMID: 29179997 Via activation of cAMP/PKA/CREB pathway and upregulation of the downstream FtMt expression. PMID: 30069985 The mechanism of prostaglandin E2-induced transcriptional up-regulation of Oncostatin-M by CREB and Sp1 has been described. PMID: 29269396 The findings suggest that activation of TGR5 promoted mitochondrial biogenesis in endothelial cells, which is mediated by the CREB/PGC-1a signaling pathway. PMID: 29709472 High CREB expression is associated with esophageal squamous cell carcinoma. PMID: 29286131 CREB1 may activate the transcription of wtBRAF through directly binding to its promoter, increasing BRAF expression and regulating the cell proliferation, migration and invasion of endometriosis. PMID: 29286077 to explore genetic variations in CREB1 promoter region and determine whether these loci affect transcriptional activity and risk on type 2 diabetes (T2D). Three polymorphisms were identified and designated as MU1, MU2 and MU3, respectively. Genotypic distribution analysis revealed that MU1 genotypes presented similar distribution between T2D and healthy controls (P>0.05) PMID: 29729382 experiments mainly reveal that the CREB1 could affect glucose transport in glioma cells by regulating the expression of GLUT1, which controlled the metabolism of glioma and affected the progression of glioma. PMID: 28646353 These data highlight a novel arrestin-mediated modulation of CREB signalling, suggesting a reciprocal relationship between arrestin2 and arrestin3, wherein recruitment of arrestin3 restricts the ability of beta2AR to activate prolonged CREB phosphorylation by precluding recruitment of an arrestin2/Src/p38 complex. PMID: 28733084 The authors conclude that taurodeoxycholic acid-induced DNA damage may depend on the activation of TGR5, CREB and NOX5-S. It is possible that in Barrett's patients bile acids may activate NOX5-S and increase reactive oxygen species (ROS) production via activation of TGR5 and CREB. NOX5-S-derived ROS may cause DNA damage, thereby contributing to the progression from Barrett's esophagus to esophageal adenocarcinoma. PMID: 27511066 The mechanism of CBP-CREB association via their pKID/KIX domains studied by molecular dynamics free energy simulations has been reported. PMID: 27054660 Results indicate CREB1 as a critical transcription factor of RRM2 which promotes tumor aggressiveness, and imply a significant correlation between CREB1 and RRM2 in CRC specimens. PMID: 27801665 Study suggest that both p300 and CREB are required for the function integrity of HIF-1alpha transcription machinery and subsequent angiogenesis, suggesting future studies to improve burn wound healing might be directed to optimization of the interaction between p300, CREB and HIF-1alpha. PMID: 27808477 These findings suggest that CREB1 may be a potential therapeutic target for the treatment of gastric cancer PMID: 28498439 YAP/ TAZ pathways contribute to the proliferation/quiescence switch during colon cancer 5FU treatment according to the concerted regulation of Cyclin E1 and CREB PMID: 27527859 Data demonstrate that CREB is downregulated in glioma cells and is a direct target of miR-433-3p. These findings indicate that CREB subsequently directly or indirectly modulates its target genes to control the cell growth and metastasis in glioma. PMID: 27926502 these studies demonstrate that transcription factors CREB and c-Myc maintain the transcriptional activity of STING PMID: 27835584 GRK3 is a new critical activator of neuroendocrine phenotypes and mediator of CREB activation in promoting neuroendocrine differentiation of prostate cancer cells. PMID: 27191986 miR-150 is a novel Wnt effector that may significantly enhance epithelial-mesenchymal transition of colorectal cancer cells by targeting the CREB signaling pathway PMID: 27285761 fMRI and genotyping data from a large human sample, together with previous evidence, support the view that CREB1-associated mechanisms modulate brain function and behavior during reward-based decision-making. PMID: 26045569 Knockdown of either HIF-1 or CREB or both in hypoxia reduced the expression of hypoxia-response elements- and CRE-mediated gene expression, diminished cell proliferation and increased caspase-3 activity. PMID: 27934882 MnTE-2-PyP decreased p300 complex binding to a specific HRE motif within the PAI-1 gene promoter region, suppressed H3K9 acetylation, and consequently, repressed PAI-1 expression. Mechanistically, less p300 transcriptional complex binding is not due to the reduction of binding between p300 and HIF-1/CREB transcription factors, but through inhibiting the binding of HIF-1/CREB transcription factors to DNA PMID: 26944191 Inhibition of CaN attenuated the hTau-induced CREB dephosphorylation with improved synapse and memory functions. PMID: 27298345 Via blocking the hypoxia-mediated reduction in CREB phosphorylation. PMID: 28254846 The study adds evidence that CREB, a tumor oncogene, promotes renal cell carcinoma proliferation. It probably achieves this by increasing SKA2 expression PMID: 26824422 cigarette smoke extracts activate the PKA, CREB, and IL-13Ralpha2 axis in lung endothelial cells. PMID: 27986643 This study showed that the induction level of IL-32 was increased in chronic rhinosinusitis with nasal polyps compared to normal nasal mucosa and that LPS-induced IL-32 expression in nasal polyp-derived fibroblasts was regulated via the TLR4/JNK/AKT/CREB signaling pathway. PMID: 27173130 Studies indicate that the small molecule ICG-001 selectively blocks the cAMP response element-binding (CREB) protein (CBP)/beta-catenin or gamma-catenin interaction. PMID: 28479420 Study indicates that BPA increases phosphorylated CREB in MCF-7 Cells as well as it binding to SOX2 enhancer. PMID: 28244015 study concludes that miR-132 regulated SIRT1/CREB/ABCG2 signaling pathway contributing to the cisplatin resistance and might serve as a novel therapeutic target against gastric cancer PMID: 28383763 Leptin also significantly increased cAMP levels, cAMP response element (CRE) activation, and CREB phosphorylation. PMID: 28571770 these data show the existence of functional CREB and C/EBP binding sites in the human RIC8B gene promoter, a particular distribution of these sites and demonstrate a relevant role of CREB in stimulating transcriptional activity of this gene. PMID: 26729411 MALAT1 knockdown reduces reactive gliosis, Muller cell activation, and RGC survival in vivo and in vitro MALAT1-CREB binding maintains CREB phosphorylation by inhibiting PP2A-mediated dephosphorylation, which leads to continuous CREB signaling activation. PMID: 26964565 aberrant activation of CREB-C/EBPdelta axis concurring to AML onset by disrupting the myeloid cell differentiation process PMID: 27118402 miR-27b-3p levels were found to be significantly negatively correlated with both NR5A2 and CREB1 levels in breast cancer tissues. PMID: 27809310 Interactions between GNB3, CREB1 and negative life events were revealed. Further evidence is provided about the role of the environment in genetic vulnerability to major depression. PMID: 28225778 Our study establishes a robust human stem cell-based platform for consistent quantitative evaluation of genotype-dependent Rett syndrome (RTT) phenotypes at the cellular level. PMID: 28270572 UCA1 promotes cisplatin/gemcitabine resistance in bladder cancer cells through CREB modulation of miR-196a-5p expression. PMID: 27591936 Report a distinct group of myxoid mesenchymal neoplasms occurring in children or young adults with a predilection for intracranial locations with EWSR1-AFT1/CREB1/CREM fusions. PMID: 28009602 CREB1/FoxA1 signaling is a targetable driver of prostate cancer progression and serves as a biomarker of poor clinical outcomes. PMID: 26743006 These results suggest that the HIPK2-phospho-Ser271 CREB axis is a new arsenic-responsive CREB activation mechanism in parallel with the PKA-phospho-Ser133 CREB axis. PMID: 27884605 There were decreased levels of Gsa, FOXF1, CREB1, and phosphorylated CREB1 proteins in intestinal muscle layers of patients with chronic intestinal pseudo-obstruction, compared with tissues from controls. PMID: 28043906 Regulatory elements for both IRF-1 (-1019 to -1016) and CREB (-1198 to -1195), specific to the distal THBS1 promoter, were required for leptin-induced TSP-1 transcription. PMID: 27281481 The results suggest that Sirt2 plays a crucial role in neuronal differentiation via the ERK-CREB signaling pathway. PMID: 27838300 revealed more than 170 NFAT-associated proteins, half of which are involved in transcriptional regulation. Among them are many hitherto unknown interaction partners of NFATc1 and NFATc2 in T cells, such as Raptor, CHEK1, CREB1, RUNX1, SATB1, Ikaros, and Helios. PMID: 27637333

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Proteins are sensitive to heat, and freeze-drying can preserve the activity of the majority of proteins. It improves protein stability, extends storage time, and reduces shipping costs. However, freeze-drying can also lead to the loss of the active portion of the protein and cause aggregation and denaturation issues. Nonetheless, these adverse effects can be minimized by incorporating protective agents such as stabilizers, additives, and excipients, and by carefully controlling various lyophilization conditions.

Commonly used protectant include saccharides, polyols, polymers, surfactants, some proteins and amino acids etc. We usually add 8% (mass ratio by volume) of trehalose and mannitol as lyoprotectant. Trehalose can significantly prevent the alter of the protein secondary structure, the extension and aggregation of proteins during freeze-drying process; mannitol is also a universal applied protectant and fillers, which can reduce the aggregation of certain proteins after lyophilization.

Our protein products do not contain carrier protein or other additives (such as bovine serum albumin (BSA), human serum albumin (HSA) and sucrose, etc., and when lyophilized with the solution with the lowest salt content, they often cannot form A white grid structure, but a small amount of protein is deposited in the tube during the freeze-drying process, forming a thin or invisible transparent protein layer.

Reminder: Before opening the tube cap, we recommend that you quickly centrifuge for 20-30 seconds in a small centrifuge, so that the protein attached to the tube cap or the tube wall can be aggregated at the bottom of the tube. Our quality control procedures ensure that each tube contains the correct amount of protein, and although sometimes you can't see the protein powder, the amount of protein in the tube is still very precise.

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