Recombinant Human KAT3A (CREBBP) Protein

Name: Recombinant Human KAT3A (CREBBP) Protein
Brand: Beta LifeScience
SKU: BL-0175SG
Availability: InStock

Collections: Other recombinant proteins, Recombinant proteins

Our products are highly customizable to meet your specific needs. You can choose options such as endotoxin removal, liquid or lyophilized forms, preferred tags, and the desired functional sequence range for proteins. Submitting a written inquiry expedites the quoting process.

Submit an inquiry today to inquire about all available size options and prices! Connect with us via the live chat in the bottom corner to receive immediate assistance.

Product Overview

Tag	GST
Host Species	Human
Accession	NM_004380
Synonym	CREBBP; CBP; RSTS
Background	KAT3A has intrinsic histone acetyltransferase activity that acts as a scaffold to stabilize additional protein interactions with the transcription complex and acetylates both histone and non-histone proteins. KAT3A (CREBBP) expressed as a nuclear protein that binds to cAMP-response element binding protein (CREB) and involved in the transcriptional coactivation of many different transcription factors. KAT3A plays a main role in embryonic development, growth control, and homeostasis by coupling chromatin remodeling to transcription factor recognition (1). KAT3A also plays a critical role in the transmission of inductive signals from cell surface receptors to the transcriptional apparatus (2).
Description	Recombinant human KAT3A (CREBBP) (1319-1710) was produced by baculovirus in Sf9 insect cells, fused with a GST tag at N-terminus. This protein is purified with our unique purification methods.
Source	Sf9 insect cells
AA Sequence	1319-1710a.a.
Molecular Weight	~72 kDa
Purity	For specific purity information on a given lot, see related COA.
Endotoxin	< 1.0 EU per μg of the protein as determined by the LAL method
Bioactivity	Active
Formulation	Recombinant protein is supplied in 50mM Tris-HCl, pH 7.5, 50mM NaCl, 10mM Glutathione, 0.25mM DTT, 0.1mM EDTA, 0.1mM PMSF and 25% glycerol.
Stability	The recombinant protein is stable for up to 12 months at -70°C
Usage	For Research Use Only
Storage	Recombinant Human KAT3A (CREBBP) Protein should be stored should be stored at < -70°C. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.

Target Details

Target Function	Acetylates histones, giving a specific tag for transcriptional activation. Also acetylates non-histone proteins, like DDX21, FBL, IRF2, MAFG, NCOA3, POLR1E/PAF53 and FOXO1. Binds specifically to phosphorylated CREB and enhances its transcriptional activity toward cAMP-responsive genes. Acts as a coactivator of ALX1. Acts as a circadian transcriptional coactivator which enhances the activity of the circadian transcriptional activators: NPAS2-ARNTL/BMAL1 and CLOCK-ARNTL/BMAL1 heterodimers. Acetylates PCNA; acetylation promotes removal of chromatin-bound PCNA and its degradation during nucleotide excision repair (NER). Acetylates POLR1E/PAF53, leading to decreased association of RNA polymerase I with the rDNA promoter region and coding region. Acetylates DDX21, thereby inhibiting DDX21 helicase activity. Acetylates FBL, preventing methylation of 'Gln-105' of histone H2A (H2AQ104me). Functions as a transcriptional coactivator for SMAD4 in the TGF-beta signaling pathway.
Subcellular Location	Cytoplasm. Nucleus. Note=Recruited to nuclear bodies by SS18L1/CREST. In the presence of ALX1 relocalizes from the cytoplasm to the nucleus.
Database References	HGNC: 2348 OMIM: 180849 KEGG: hsa:1387 STRING: 9606.ENSP00000262367 UniGene: Hs.459759
Associated Diseases	Rubinstein-Taybi syndrome 1 (RSTS1)

Gene Functions References

Co-immunoprecipitation analysis and siRNA-mediated suppression of CREB expression indicated that phospho-CREB has a positive effect on pro-inflammatory gene expression in the crosstalk between BAFF- and TLR4-mediated signaling by forming trimeric complexes containing NF-kappaB, CBP, and CREB PMID: 28374824
CREBBP and p300 may contribute to genome stability by fine-tuning the functions of DNA damage signaling and DNA repair factors, thereby expanding their role as tumor suppressors. (Review) PMID: 29170789
This review is focused on the different targets and functions of p300/CBP in physiological and pathological processes, including lipogenesis, lipid export, gluconeogenesis, and liver fibrosis, also provided some nutrients as the regulator of p300/CBP for nutritional therapeutic approaches to treat liver diseases. PMID: 29862292
provide evidence that both CREBBP and EP300 are bona fide tumor suppressors that control MHCII expression and promote tumor immune control; mutational inactivation of CREBBP, but not of EP300, has additional cell-intrinsic engraftment and growth-promoting effects PMID: 28831000
BRD, PHD, and ZZ domains interact with SUMO-1 and Ubc9, and function as an intramolecular E3 ligase for SUMOylation of the cell cycle regulatory domain 1; the BRD is essential for histone H3 acetylation PMID: 28630323
CREBBP Mutation is associated with Rubinstein-Taybi Syndrome and Medulloblastoma. PMID: 29551561
The recruitment of COASY inhibits CBP-mediated TPX2 acetylation, promoting TPX2 degradation for mitotic exit. PMID: 29531224
GATA3 interacts with and is acetylated by the acetyltransferase CBP. The major acetylated site of GATA3 in lung adenocarcinoma cells is lysine 119. PMID: 29453984
Our study demonstrated the association of low CREBBP expression with adverse clinical and biological features, poor prednisone response, high MRD levels and inferior outcomes in paediatric Chinese patients with ALL who were treated with the BCH- 2003 and CCLG- 2008 pro- tocols. PMID: 28452416
Knockdown of CREB suppressed the expression of matrix metallopeptidase (MMP)2/9. PMID: 28487942
mutation unlikely to be an early event in squamous cell carcinogenesis PMID: 27094574
Ectopic expression of EP300-ZNF384 and CREBBP-ZNF384 fusion altered differentiation of mouse hematopoietic stem and progenitor cells and also potentiated oncogenic transformation in vitro.our results indicate that gene fusion is a common class of genomic abnormalities in childhood ALL and that recurrent translocations involving EP300 and CREBBP may cause epigenetic deregulation with potential for therapeutic targeting. PMID: 27903646
The CREBBP acetyltransferase is a haploinsufficient tumor suppressor in B-cell lymphoma. PMID: 28069569
Understanding the effects of disrupting the acetyltransferase activity of CBP/p300 could pave the way for new therapeutic approaches to treat patients with these diseases PMID: 27380996
How cancer cells use p300/CBP in their favor varies depending on the cellular context and is evident by the growing list of loss- and gain-of-function genetic alterations in p300 and CBP in solid tumors and hematological malignancies.[review] PMID: 27881443
Mutations of CREBBP and SOCS1 are independent prognostic factors in diffuse large B cell lymphoma; CREBBP and EP300 mutations remained significant to predict worse OS, PFS, and EFS. PMID: 28302137
We conclude that patients with missense mutations in this specific CREBBP region show a phenotype that differs substantially from that in patients with Rubinstein-Taybi syndrome, and may prove to constitute one (or more) separate entities. PMID: 27311832
Pre-eclampsia occurs in 12/52 mothers of EP300 mutated individuals versus in 2/59 mothers of CREBBP mutated individuals, making pregnancy with an EP300 mutated fetus the strongest known predictor for pre-eclampsia PMID: 27648933
Earlier loss of Crebbp is advantageous for lymphoid transformation and inform the cellular origins and subsequent evolution of lymphoid malignancies. PMID: 28825697
Data show that specifically inhibiting the interaction between CBP and catenin with ICG-001 results in the differentiation of quiescent drug-resistant chronic myelogenous leukemia-initiating cells (CML LICs). PMID: 26657156
5-FU promotes global histone de-acetylation by enhancing the degradation of p300/CBP in colorectal neoplasms. PMID: 28465257
CREBBP mutations were associated with inferior progression-free survival (PFS), whereas mutations in previously unreported HVCN1, a voltage-gated proton channel-encoding gene and B-cell receptor signaling modulator, were associated with improved PFS. PMID: 28064239
the rate-limiting transition state for binding between the TAZ1 domain of CREB binding protein and the intrinsically disordered transactivation domain of STAT2 (TAD-STAT2) by site-directed mutagenesis and kinetic experiments (Phi-value analysis) and found that the native protein-protein binding interface is not formed at the transition state for binding. PMID: 28707474
In targeted sequencing, a disruptive mutation of TNFAIP3 was the most common alteration (54%), followed by mutations of TBL1XR1 (18%) and cAMP response element binding proteins (CREBBP) (17%). PMID: 28152507
A mosaic variant in CREBBP identified as pathogenic in a patient with overlapping clinical features of Rubinstein-Taybi and Filippi syndromes tested negative for CKAP2L. PMID: 26956253
CREBBP-BCORL1 fusion is associated with ossifying fibromyxoid tumors. PMID: 27537276
Mapping the interactions of adenoviral E1A proteins with the p160 nuclear receptor coactivator binding domain of CBP PMID: 27699893
CREBBP mutations might assist in enhancing oncogenic RAS signaling in acute lymphoblastic leukemia but do not alter response to MEK inhibitors. PMID: 27979926
Mutations identified in patients with and without classical Rubinstein-Taybi syndrome lead to skipping of exon20 of CREBBP. PMID: 27165009
Letter/Case Report: duplication mutation, c.5837dupC (p.P1947TfsX19), in CREBBP in patient with Rubinstein-Taybi syndrome with multiple pilomatricomas. PMID: 27342041
C646 treatment attenuated ETV1 protein expression and inactivated KIT-dependent pathways. Taken together, the present study suggests that CBP/p300 may serve as novel antineoplastic targets and that use of the selective HAT inhibitor C646 is a promising antitumor strategy for Gastrointestinal stromal tumors. PMID: 27633918
The CREBBP gene is believed to be the dosage-sensitive critical gene responsible for the reciprocal duplication and deletion syndrome PMID: 26873618
Results show that CREBBP was the most frequent target of epigenetic modification in juvenile myelomonocytic leukemia. PMID: 27158276
Data show that mutation of key residues in the binding site abolishes binding and that small ubiquitin-like modifier 1 (SUMO1) can simultaneously and non-cooperatively bind both the ZZ domain and a canonical SIM motif of CREB-binding protein (CBP/p300). PMID: 27129204
Cyclic AMP Response Element Binding Protein Mediates Pathological Retinal Neovascularization via Modulating DLL4-NOTCH1 Signaling PMID: 26870802
high expression of both CREB-binding protein and cleavage and polyadenylation specific factor 4 predicted a poor prognosis in the patients with lung adenocarcinomas. PMID: 26628108
RFPL3 and CBP have roles in upregulating hTERT activity and promoting lung cancer growth PMID: 26318425
Disruption of beta-catenin/CBP signaling inhibits human airway epithelial-mesenchymal transition and repair. PMID: 26315281
Intrinsic protein disorder plays a prominent role in the function and interactions of the transcriptional co-activators CBP and p300. (Review) PMID: 26851278
42 new CREBBP mutations were reported in 46 Rubinstein-Taybi syndrome patients. PMID: 25388907
Computational simulations were used to understand how phosphorylation affects the structure of the p53 terminal transactivation domain in complex with the CBP TAZ2 domain. PMID: 26742101
these data suggest that CBP/p300 are promising therapeutic targets across multiple subtypes in acute myeloid leukemia. PMID: 25893291
Conclude that the CBP/beta-catenin complex is a core component of the MDR1 transcriptional "enhancesome" in neoplasms. PMID: 25968898
WNT/beta-catenin signaling does not affect nuclear translocation of the RelA subunit of NF-kappaB or its association with CBP (also known as CREBBP) PMID: 26021349
Kaposi's sarcoma-associated herpesvirus vIRF4 targets the beta-catenin/CBP cofactor and blocks its occupancy on the cyclin D1 promoter, suppressing the G1-S cell cycle progression and enhancing virus replication. PMID: 26491150
Case Report: novel nonsense mutation of CREBBP in a patient with Rubinstein-Taybi syndrome. PMID: 26603346
destabilization of p300/CBP by downregulation of iASPP expression levels appears to represent a molecular mechanism that contributes to chemoresistance in melanoma cells. PMID: 25675294
these findings suggest that sumoylation plays a critical role in the spatiotemporal co-activation of CLOCK-BMAL1 by CBP for immediate-early Per induction and the resetting of the circadian clock. PMID: 26164627
First study of Korean Rubinstein-Taybi syndrome patients indicating distinct geographic distribution of CREBBP mutations PMID: 25108505
CREBBP mutations are associated with recurrence in hyperdiploid acute lymphoblastic leukemia. PMID: 25917266

FAQs

Please fill out the Online Inquiry form located on the product page. Key product information has been pre-populated. You may also email your questions and inquiry requests to sales1@betalifesci.com. We will do our best to get back to you within 4 business hours.

Feel free to use the Chat function to initiate a live chat. Our customer representative can provide you with a quote immediately.

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.

To learn more about how to properly dissolve the lyophilized recombinant protein, please visit Lyophilization FAQs.