Recombinant Human Chromobox Protein Homolog 7 (CBX7) Protein (His)

Name: Recombinant Human Chromobox Protein Homolog 7 (CBX7) Protein (His)
Brand: Beta LifeScience
SKU: BLC-04623P
Availability: InStock

Greater than 90% as determined by SDS-PAGE.

Collections: All products, High-quality recombinant proteins, Other recombinant proteins

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Product Overview

Description	Recombinant Human Chromobox Protein Homolog 7 (CBX7) 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	O95931
Target Symbol	CBX7
Synonyms	CBX7; Chromobox protein homolog 7
Species	Homo sapiens (Human)
Expression System	E.coli
Tag	N-6His
Target Protein Sequence	MELSAIGEQVFAVESIRKKRVRKGKVEYLVKWKGWPPKYSTWEPEEHILDPRLVMAYEEKEERDRASGYRKRGPKPKRLLLQRLYSMDLRSSHKAKGKEKLCFSLTCPLGSGSPEGVVKAGAPELVDKGPLVPTLPFPLRKPRKAHKYLRLSRKKFPPRGPNLESHSHRRELFLQEPPAPDVLQAAGEWEPAAQPPEEEADADLAEGPPPWTPALPSSEVTVTDITANSITVTFREAQAAEGFFRDRSGKF
Expression Range	1-251aa
Protein Length	Full Length
Mol. Weight	32.3kDa
Research Area	Transcription
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	Component of a Polycomb group (PcG) multiprotein PRC1-like complex, a complex class required to maintain the transcriptionally repressive state of many genes, including Hox genes, throughout development. PcG PRC1 complex acts via chromatin remodeling and modification of histones; it mediates monoubiquitination of histone H2A 'Lys-119', rendering chromatin heritably changed in its expressibility. Promotes histone H3 trimethylation at 'Lys-9' (H3K9me3). Binds to trimethylated lysine residues in histones, and possibly also other proteins. Regulator of cellular lifespan by maintaining the repression of CDKN2A, but not by inducing telomerase activity.
Subcellular Location	Nucleus.
Database References	HGNC: 1557 OMIM: 608457 KEGG: hsa:23492 STRING: 9606.ENSP00000216133 UniGene: PMID: 27291091 CBX7 inhibits epithelial-to-mesenchymal transformation and invasion in glioma PMID: 28388562 our results validate the assumption that CBX7 is a tumor suppressor of gliomas. Moreover, CBX7 is a potential and novel prognostic biomarker in glioma patients. We also clarified that CBX7 silences CCNE1 via the combination of CCNE1 promoter and the recruitment of HDAC2. PMID: 28460453 Suggest CBX7 is an important tumor suppressor that negatively modulates PTEN/Akt signaling during pancreatic tumorigenesis. PMID: 28030829 Data suggest that miR-375 leads to the activation of oncogenic signatures and tumor progression by targeting chromobox homolog 7 protein (CBX7). PMID: 27449098 the miR-9 family of microRNAs (miRNAS) downregulates the expression of CBX7. In turn, CBX7 represses miR-9-1 and miR-9-2 as part of a regulatory negative feedback loop. PMID: 26416703 these results suggest that the retention of CBX7 expression may play a role in the modulation of chemosensitivity of lung cancer patients to the treatment with irinotecan and etoposide PMID: 26216446 Cbx7 is downregulated in CCs, and Cbx7 expression-low tumors correlated with lymph metastasis and poor overall survival of CC patients. PMID: 25881303 CBX7/HMGA1b/NF-kappaB could take part in the same transcriptional mechanism that finally leads to the regulation of SPP1 gene expression in papillary thyroid carcinoma. PMID: 25595895 Aberrantly expressed miR-9 contributes to T24 cells invasion, partly through directly down-regulating CBX7 protein expression in bladder transitional cell carcinoma PMID: 25596753 Results suggest that the loss of CBX7 expression might play a critical role in advanced stages of carcinogenesis by deregulating the expression of specific effector genes. PMID: 24865347 we showed for the first time that CBX7 was associated with a decreased prognosis for clear cell adenocarcinoma of the ovary PMID: 24375438 cbx7 expression was significantly downregulated in multiple human cancer tissues. PMID: 22041561 MicroRNA regulation of Cbx7 mediates a switch of Polycomb orthologs during ESC differentiation. PMID: 22226354 These data suggest that CBX7 is a tumor suppressor and that its loss plays a key role in the pathogenesis of cancer. PMID: 22214847 found that expression of CBX7 in gastric carcinoma tissues with p16 methylation was significantly lower than that in their corresponding normal tissues, which showed a negative correlation with transcription of p16 in gastric mucosa PMID: 21060834 CBX7 acts as an oncogene in the carcinogenesis and progression of gastric cancer, and it may regulate tumorigenesis, cell migration and cancer metastasis partially via p16(INK4a) regulatory pathway. PMID: 20723236 data reported indicate that the evaluation of CBX7 expression may represent a valid tool in the prognosis of colon cancer since a reduced survival of colorectal cancer patients is associated with the loss of CBX7 expression. PMID: 20542683 Data show that chromobox 7 (CBX7) within the polycomb repressive complex 1 binds to ANRIL, and both CBX7 and ANRIL are found at elevated levels in prostate cancer tissues. PMID: 20541999 In human glioma, CBX7 is down-regulated by the inhibition of miR-9 at posttranscriptional level. PMID: 18686603 controls cellular lifespan through regulation of both the p16(Ink4a)/Rb and the Arf/p53 pathways PMID: 14647293 CBX7 represses melanoma, p16, inhibits CDK4 and p14Arf expression in normal and tumor-derived prostate cells, affecting their growth PMID: 15897876 CBX7 is a chromobox protein causally linked to cancer development PMID: 17374722 Loss of the CBX7 gene expression correlates with a highly malignant phenotype in thyroid cancer PMID: 18701502 Downregulation of CBX7 is associated with urothelial tumor progression. PMID: 18984978 the ability of CBX7 to positively regulate E-cadherin expression by interacting with HDAC2 and inhibiting its activity on the E-cadherin promoter would account for the correlation between the loss of CBX7 expression and a highly malignant phenotype PMID: 19706751

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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.

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