Recombinant Human Semaphorin-3B (SEMA3B) Protein (His)

Name: Recombinant Human Semaphorin-3B (SEMA3B) Protein (His)
Brand: Beta LifeScience
SKU: BLC-01940P
Availability: InStock

Greater than 85% as determined by SDS-PAGE.

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

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Product Overview

Description	Recombinant Human Semaphorin-3B (SEMA3B) Protein (His) is produced by our E.coli expression system. This is a full length protein.
Purity	Greater than 85% as determined by SDS-PAGE.
Uniprotkb	Q13214
Target Symbol	SEMA3B
Synonyms	Sema A(V) (Semaphorin-V) (Sema V)
Species	Homo sapiens (Human)
Expression System	E.coli
Tag	N-6His
Target Protein Sequence	APSPPRLRLSFQELQAWHGLQTFSLERTCCYQALLVDEERGRLFVGAENHVASLNLDNISKRAKKLAWPAPVEWREECNWAGKDIGTECMNFVKLLHAYNRTHLLACGTGAFHPTCAFVEVGHRAEEPVLRLDPGRIEDGKGKSPYDPRHRAASVLVGEELYSGVAADLMGRDFTIFRSLGQRPSLRTEPHDSRWLNEPKFVKVFWIPESENPDDDKIYFFFRETAVEAAPALGRLSVSRVGQICRNDVGGQRSLVNKWTTFLKARLVCSVPGVEGDTHFDQLQDVFLLSSRDHRTPLLYAVFSTSSSIFQGSAVCVYSMNDVRRAFLGPFAHKEGPMHQWVSYQGRVPYPRPGMCPSKTFGTFSSTKDFPDDVIQFARNHPLMYNSVLPTGGRPLFLQVGANYTFTQIAADRVAAADGHYDVLFIGTDVGTVLKVISVPKGSRPSAEGLLLEELHVFEDSAAVTSMQISSKRHQLYVASRSAVAQIALHRCAAHGRVCTECCLARDPYCAWDGVACTRFQPSAKRRFRRQDVRNGDPSTLCSGDSSRPALLEHKVFGVEGSSAFLECEPRSLQARVEWTFQRAGVTAHTQVLAEERTERTARGLLLRRLRRRDSGVYLCAAVEQGFTQPLRRLSLHVLSATQAERLARAEEAAPAAPPGPKLWYRDFLQLVEPGGGGSANSLRMCRPQPALQSLPLESRRKGRNRRTHAPEPRAERGPRSATHW
Expression Range	25-749aa
Protein Length	Full Length of Mature Protein
Mol. Weight	85.0 kDa
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	Inhibits axonal extension by providing local signals to specify territories inaccessible for growing axons.
Subcellular Location	Secreted. Endoplasmic reticulum. Note=Accumulates in the endoplasmic reticulum.
Protein Families	Semaphorin family
Database References	HGNC: 10724 OMIM: 601281 KEGG: hsa:7869 UniGene: PMID: 29763494 data provide new insights into the role of SEMA3B in mammary gland and provides a new branch of GATA3 signaling that is pivotal for inhibition of breast cancer progression and metastasis PMID: 28581515 By upregulating p53 and p21 expression and inhibiting Akt (Ser473) phosphorylation, SEMA3B could induce cell cycle arrest at G1/S phase. PMID: 27349960 As the clinical pathological glioma grade increased, SEMA3B expression decreased. PMID: 27050958 Maternal SEMA 3B level increased in preeclampsia before the onset of manifestations, indicating that SEMA 3B plays a role in the pathogenesis of preeclampsia PMID: 26828533 Aberrant expression and methylation of SEMA3B could be suggested as markers of lung and renal cancer progression. PMID: 25961819 although plexin-A4 overexpression restored Sema3A signaling in plexin-A1-silenced cells, it failed to restore Sema3B signaling in plexin-A2-silenced cells. PMID: 25335892 SEMA3B mRNA and protein is not altered in severe early onset preeclamptic placentas. PMID: 25454475 CpG methylation of SEMA3B epigenetically regulates SEMA3B expression during development of gastric cancer. PMID: 24402303 The transcriptional activity of RHOA, SEMA3B, and CKAP2 genes was assessed in blood samples of leukaemia patients and healthy donors. PMID: 24280143 Three candidate tumor-suppressor genes, SEMA3B, AXUD1 and GNAT1 may be involved in oral squamous cell carcinoma. PMID: 23292452 Loss of Sema3B expression is associated with biochemical recurrence of patients with low- and intermediate-risk prostate cancer. PMID: 23906303 semaphorin-3B and semaphorin-3F have roles in ovarian cancer PMID: 20124444 that methylation of promoter CpG-island contributed into inactivation of SEMA3B gene-suppressor in RCC. PMID: 20088387 Human Semaphorin 3B (SEMA3B) located at chromosome 3p21.3 suppresses tumor formation in an adenocarcinoma cell line. PMID: 11809707 SEMA3B gene alterations may play a important role in the malignant transformation of NSCLC via a two-hit mechanism, including epigenetic changes and allelic loss, for tumor suppressor gene inactivation. PMID: 12810670 Heterozygous or homozygous variant genotype confers a >40% reduced relative risk of lung cancer in Latino Americans controlling for other lung cancer risk factors. PMID: 15831529 Higher level of SEMA3B expression was found in differentiated tumors with favorable histopathology (n = 19) than in tumors with unfavorable histology. PMID: 17452250 A putative role for SEMA3B as an osteoblast protein that regulates bone mass and skeletal homeostasis. PMID: 18356290 SEMA3B exerts unexpected functions in cancer progression by fostering a prometastatic environment through elevated IL-8 secretion. PMID: 18458115 Repulsion of human umbilical vascular endothelial cells by sema3B-m was mediated primarily by the neuropilin-1 receptor but sema3B-m was also able to transduce signals via neuropilin-2 PMID: 18757406 SEMA3B is a potential tumor suppressor that induces apoptosis in SEMA3B-inactivated tumor cells through the Np-1 receptor by inactivating the Akt signaling pathway. PMID: 18922901 IGFBP-6 is the effector of tumor suppressor activity of SEMA3B. PMID: 18985860 SEMA3B plays role in inhibiting of growth of renal, ovarian and colorectal cancer cells. PMID: 19548530 These data indicate that polymorphisms in SEMA3B are associated with prostate cancer risk and poor prognosis in Hispanic and nonHispanic white men PMID: 19683737 Identification of semaphorin 3B as a direct target of p53. PMID: 11922394

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.