Recombinant Human Serpin B4 (SERPINB4) Protein (His-SUMO)

Name: Recombinant Human Serpin B4 (SERPINB4) Protein (His-SUMO)
Brand: Beta LifeScience
SKU: BLC-04087P
Availability: InStock

Greater than 90% as determined by SDS-PAGE.

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Product Overview

Description	Recombinant Human Serpin B4 (SERPINB4) Protein (His-SUMO) is produced by our E.coli expression system. This is a full length protein.
Purity	Greater than 90% as determined by SDS-PAGE.
Uniprotkb	P48594
Target Symbol	SERPINB4
Synonyms	Leupin; Peptidase inhibitor 11; PI 11; PI-11; PI11; Protease inhibitor (leucine serpin); SCCA 2; SCCA-2; SCCA1; SCCA2; SCCA2/SCCA1 fusion protein; Serine (or cysteine) proteinase inhibitor; clade B (ovalbumin); member 4; Serpin B4; Serpin peptidase inhibitor; clade B (ovalbumin); member 4; SERPINB 4; SERPINB4; SPB4_HUMAN; Squamous cell carcinoma antigen 1; Squamous cell carcinoma antigen 2
Species	Homo sapiens (Human)
Expression System	E.coli
Tag	N-6His-SUMO
Target Protein Sequence	MNSLSEANTKFMFDLFQQFRKSKENNIFYSPISITSALGMVLLGAKDNTAQQISKVLHFDQVTENTTEKAATYHVDRSGNVHHQFQKLLTEFNKSTDAYELKIANKLFGEKTYQFLQEYLDAIKKFYQTSVESTDFANAPEESRKKINSWVESQTNEKIKNLFPDGTIGNDTTLVLVNAIYFKGQWENKFKKENTKEEKFWPNKNTYKSVQMMRQYNSFNFALLEDVQAKVLEIPYKGKDLSMIVLLPNEIDGLQKLEEKLTAEKLMEWTSLQNMRETCVDLHLPRFKMEESYDLKDTLRTMGMVNIFNGDADLSGMTWSHGLSVSKVLHKAFVEVTEEGVEAAAATAVVVVELSSPSTNEEFCCNHPFLFFIRQNKTNSILFYGRFSSP
Expression Range	1-390aa
Protein Length	Full Length
Mol. Weight	60.9kDa
Research Area	Cancer
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	May act as a protease inhibitor to modulate the host immune response against tumor cells.
Subcellular Location	Cytoplasm. Note=Seems to also be secreted in plasma by cancerous cells but at a low level.
Protein Families	Serpin family, Ov-serpin subfamily
Database References	HGNC: 10570 OMIM: 600518 KEGG: hsa:6318 STRING: 9606.ENSP00000343445 UniGene: PMID: 29712495 Both periostin and SCCA may play a role in the pathogenesis of acute bronchitis due to respiratory syncytial virus PMID: 29122495 Serum SCCA2 levels reflected disease severity and clinical type of atopic dermatitis. Serum SCCA2 may thus be a relevant biomarker for atopic dermatitis. PMID: 28734739 Data show that oropharyngeal squamous cell carcinomas (OPSCCs) express granzyme inhibitors SERPINB1, SERPINB4 and SERPINB9 for cytotoxicity and the expression was not different between human papillomavirus (HPV)-positive and HPV-negative tumors. PMID: 26993499 Pediatric CNS-PNETs evade immune recognition by downregulating cell surface MHC-I and CD1d expression. Intriguingly, expression of SERPINB9, SERPINB1, and SERPINB4 is acquired during tumorigenesis in 29%, 29%, and 57% of the tumors PMID: 26963506 It is a promising serological marker for hepatocellular carcinoma. PMID: 24635038 our findings established that SCCA1 contributes to tumorigenesis by promoting EMT and a UPR-dependent induction of NF-kappaB and IL6 autocrine signaling that promotes a protumorigenic inflammation. PMID: 25213322 demonstrate the generation of Pso p27 from SCCA1 with extracts from psoriatic scale and even more remarkably, the generation of Pso p27 from SCCA1 in the presence of mast cell associated chymase PMID: 24560885 The results show that SCCA1 has diverse effects on many of the cellular events that characterize asthma and its role extends beyond protease inhibition. PMID: 23199842 The serum level of SCCA is effective for detecting inverted papilloma (IP), including recurrent IP. In contrast, the SCCA2/SCCA1 ratio is useful for detecting squamous cell carcinoma among other sinonasal diseases. PMID: 23168150 High serum SCCA1 levels are associated with lymph node metastasis, advanced tumor stage and tumor recurrence in oral cavity squamous cell carcinoma. PMID: 22576068 both HPV status and the SCCA2/SCCA1 mRNA ratio are independently associated with prognosis in HNSCC PMID: 22937809 Serpin B4 isoform overexpression is associated with aberrant epithelial proliferation and lung cancer in idiopathic pulmonary fibrosis. PMID: 22406480 Results indicate that cellular overexpression of SERPINB4 inhibits recombinant GrM-induced as well as NK cell-mediated cell death. PMID: 21857942 Data suggest that SCCA1 inhibits cell death induced by lysosomal injury while, on the other hand, it sensitizes cells to ER stress by activating caspase-8 independently of the death receptor apoptotic pathway. PMID: 21576355 Elevated serum SCCA1 is associated with squamous cell carcinoma in cervical cancer. PMID: 21338226 Transgenic mice expressing human SCCA1 showed higher liver regenerative potential compared to wild-type mice, supporting the dual role of this serpin as an anti-apoptotic and pro-proliferative stimulus for liver cells in vivo. PMID: 19956912 expression in various normal tissue types and in tumor cell lines, increase in expression induced by TNF-alpha, and role in protecting tumor cells against TNF-alpha induced apoptsis PMID: 12437110 SCCA2-like serpins mediate genetic predisposition to skin cancer in a mouse model and in humans. PMID: 12702576 SCCA2 acts as a cross-class serpin targeting an extrinsic cysteine proteinase from mites and may have a protective role against biological reactions caused by mites PMID: 14630915 SCCA variants are overexpressed in hepatocellular carcinoma independently of tumour etiology PMID: 14970861 SCCAs can alter invasive phenotype of cervical squamous cell carcinoma cells, probably by stimulating proMMP-9 production, and intact conformational structure of SCCAs is required for its stimulatory activity on proMMP-9 production PMID: 16211231 Up-regulation of squamous cell carcinoma antigen-1 (SCCA1) suppresses c-Jun NH2-terminal kinase-1 (JNK1) and thus blocks UV-induced keratinocyte apoptosis. PMID: 16549498 These results, in transgenic mice, suggest that SCAA1 might serve as an hepatitis B virus receptor or co-receptor and play an important role in mediating HBV entry into hepatocytes. PMID: 16820864 SCCA2 regulates cell migration and invasion via E-cadherin expression, suggesting that SCCA2 may be involved in cancer behavior such as invasion or metastasis. PMID: 17016656 SCCA2 may be involved in cancer behavior such as metastasis, and as such can be a useful marker in predicting lymph node metastasis. PMID: 18097581 fatty acid-binding protein-5, squamous cell carcinoma antigens 2, alpha-enolase, annexin II, apolipoprotein A-I and albumin were detected at a high level in Atopic dermatitis skin lesions, but scarcely in the normal controls PMID: 19339807

FAQs

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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.