Recombinant Human Kit Ligand (KITLG) Protein (His), Active

Name: Recombinant Human Kit Ligand (KITLG) Protein (His), Active
Brand: Beta LifeScience
SKU: BLC-06010P
Availability: InStock

Greater than 95% as determined by SDS-PAGE.

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Product Overview

Description	Recombinant Human Kit Ligand (KITLG) Protein (His), Active is produced by our Mammalian cell expression system. This is a protein fragment.
Purity	Greater than 95% as determined by SDS-PAGE.
Endotoxin	Less than 1.0 EU/μg as determined by LAL method.
Activity	The ED50 as determined in a cell proliferation assay using TF-1 human erythroleukemic cells is less than 15 ng/ml.
Uniprotkb	P21583
Target Symbol	KITLG
Synonyms	C kit ligand; C-kit ligand; Ckit ligand; DCUA; DFNA69; DKFZp686F2250; familial progressive hyperpigmentation 2; FPH2; FPHH; KIT ligand; Kitl; KITLG; KL 1; KL1; Mast cell growth factor; MGF; MGF stem cell factor; SCF; SCF_HUMAN; SF; SHEP7; sKITLG; Soluble KIT ligand; Steel factor; steel, mouse, homolog of; Stem cell factor; Stem cell factor precursor
Species	Homo sapiens (Human)
Expression System	Mammalian cell
Tag	C-6His
Complete Sequence	EGICRNRVTNNVKDVTKLVANLPKDYMITLKYVPGMDVLPSHCWISEMVVQLSDSLTDLLDKFSNISEGLSNYSIIDKLVNIVDDLVECVKENSSKDLKKSFKSPEPRLFTPEEFFRIFNRSIDAFKDFVVASETSDCVVSSTLSPEKDSRVSVTKPFMLPPVAASSLRNDSSSSNRKAKNPPGDSSLH
Expression Range	26-214aa
Protein Length	Partial
Mol. Weight	22 kDa
Research Area	Immunology
Form	Lyophilized powder
Buffer	Lyophilized from a 0.2 μm filtered 20 mM PB, 150 mM NaCl, pH 7.4
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	Ligand for the receptor-type protein-tyrosine kinase KIT. Plays an essential role in the regulation of cell survival and proliferation, hematopoiesis, stem cell maintenance, gametogenesis, mast cell development, migration and function, and in melanogenesis. KITLG/SCF binding can activate several signaling pathways. Promotes phosphorylation of PIK3R1, the regulatory subunit of phosphatidylinositol 3-kinase, and subsequent activation of the kinase AKT1. KITLG/SCF and KIT also transmit signals via GRB2 and activation of RAS, RAF1 and the MAP kinases MAPK1/ERK2 and/or MAPK3/ERK1. KITLG/SCF and KIT promote activation of STAT family members STAT1, STAT3 and STAT5. KITLG/SCF and KIT promote activation of PLCG1, leading to the production of the cellular signaling molecules diacylglycerol and inositol 1,4,5-trisphosphate. KITLG/SCF acts synergistically with other cytokines, probably interleukins.
Subcellular Location	[Isoform 1]: Cell membrane; Single-pass type I membrane protein.; [Isoform 2]: Cytoplasm. Cytoplasm, cytoskeleton. Cell membrane; Single-pass type I membrane protein. Cell projection, lamellipodium. Cell projection, filopodium.; [Soluble KIT ligand]: Secreted.
Protein Families	SCF family
Database References	HGNC: 6343 OMIM: 145250 KEGG: hsa:4254 STRING: 9606.ENSP00000228280 UniGene: PMID: 28954236 A statistically significant relationship was found between stem cell factor level and oocyte maturation, embryo quality, and clinical pregnancy. PMID: 28285567 PAR2 plays a direct role in melanogenesis by increasing SCF secretion from keratinocytes. PMID: 26909822 We did not find any KITLG mutation in two affected individuals with familial progressive hyperpigmentation and hypopigmentation. PMID: 27859606 results suggest that SCF can accelerate cell homing and the maturation of the pulp-dentin complex in human immature teeth. PMID: 27762658 SCF is a critical regulatory factor for conceptus development and implantation during pregnancy in pigs. PMID: 28551414 results revealed that the Th17-mediated inflammatory environment promotes mast cell accumulation through keratinocyte-derived SCF PMID: 28456630 Bone marrow adipocytes synthesize SCF, promoting hematopoietic stem cell proliferation/regeneration. PMID: 28714970 Hypoxia microenvironment in hepatocellular carcinoma up-regulates HIF2/SCF expression, which in turn promotes angiogenesis and HCC metastasis. PMID: 28153790 Insights into the transmembrane helix associations of Kit ligand have been reported. PMID: 28370370 There were no significant differences in CD334-SCF double-positive FB and CD31-SCF double-positive EC levels between the two periapical tissue groups (P > 0.05). CD14-SCF double-positive MP density was considerably higher in periapical granulomas than in cysts (P < 0.01). PMID: 28290616 A significant association of rs995030 of the KITLG gene with the development of testicular germ cell tumors (p = 0.029 for the allele G, p = 0.0124 for the genotype GG) was revealed. PMID: 28064312 Overexpression of SCF is associated with Lewis lung carcinoma. PMID: 26666817 both SCF and IL-31 play an important role in mediating inflammation and enhancing severity of atopic asthma. PMID: 26853551 women with endometriosis have low levels of endometrial SCF PMID: 26791471 results suggested the existence of E2F1-miR-34c-SCF negative feedback loop which was interrupted by the hyper-methylation of miR-34c promoter in CRC cells and increased cell proliferation. PMID: 26704889 IL-1b, which normally bridges innate and adaptive immunity, induces the production of the major haematopoietic/proleukaemic growth factor SCF through the PI-3K/mTOR pathway and the HIF-1a transcription complex. PMID: 25418470 We identified a new heterozygous missense mutation in two families with hyper- and hypopigmentation disorders (p.Thr34Asn and p.Val37Gly, respectively). Of the six affected individuals examined by us, two had cancer. PMID: 26179221 Na+/H+ antiporter inhibition induces cell death in TF-1 erythroleukemia cells stimulated by the stem cell factor PMID: 26188365 IL-7 and SCF are elevated for a prolonged period after double umbilical cord blood transplantation and persistently high levels of these cytokines may correlate with worse clinical outcomes. PMID: 26177551 Allelic Mutations of KITLG, Encoding KIT Ligand, Cause Asymmetric and Unilateral Hearing Loss and Waardenburg Syndrome Type 2. PMID: 26522471 Foxc1 is essential for progenitor cell development and maintenance of bone marrow niches for these cells upregulating CXCL12 and SCF expression and inhibiting of adipogenic processes in cell progenitors. (Review) PMID: 26049754 Results identified SCF as a direct target of HIF-1 in pancreatic cancer. SCF/c-kit promoted invasion and proliferation of pancreatic cancer cells and may be a new target for the treatment of pancreatic cancer. PMID: 25799412 we found that Kl treatment impairs Nodal mRNA expression and Fgf9-mediated Nanos2 induction, reinforcing the antagonistic effect of these two growth factors on the meiotic fate of male germ cells PMID: 25766327 A functional p53 responsive polymorphism in KITLG, rs4590952, does not affect the risk of breast cancer. PMID: 25220285 High SCF expression is associated with metastasis in non-small cell lung cancers. PMID: 25401222 SCF-mediated gamma-globin gene expression in adult human erythroid cells is associated with KLF1, BCL11A and SOX6 down-regulation. PMID: 25457384 overexpression of Snail in PDAC cells increased SCF levels, and the media conditioned by Snail-expressing PDAC cells promoted mast cell migration. PMID: 24944064 Paraffin-embedded, formalin-fixed tissue from 100 consecutive patients with invasive breast cancer was immunohistochemically stained for Ki-67 and Ki-67/KL1. Ki-67 was manually scored in different regions by 2 observers and automated image analysis PMID: 24897070 KIT-L could be now a direct NOBOX target. PMID: 25514101 Stem cell factor is a novel independent prognostic biomarker for hepatocellular carcinoma after curative resection. PMID: 25086759 Together, these data indicate that stem cell factor1-165 is more thermostable than stem cell factor1-141. PMID: 25061857 High KITLG is associated with growth and invasion in colorectal cancer. PMID: 25213795 These findings suggest that integration of SCF and LTD4 signals may contribute to MC hyperplasia and hyper-reactivity during airway hyper-response and inflammation PMID: 25161061 study reports a modulatory role for antimullerian hormone as an ovarian/follicular autocrine/paracrine factor controlling SCF expression via the cAMP/PKA pathway in granulosa cells PMID: 25241372 Gain-of-function mutations in c-Kit result mastocytosis, gastrointestinal stromal tumors and other hematological neoplasms. (Review) PMID: 24745671 Variants of the KITLG enhancer is associated with blond hair color. PMID: 24880339 Data reveal that SCF disrupts the endothelial adherens junction and enhances vascular leakage, and suggest that anti-SCF/cKit therapy may hold promise as a potential therapy for the treatment of hyperpermeable vascular diseases. PMID: 24790137 Data indicate that insulin-like growth factor-1 (IGF1) stimulated s tem cell factor (Kitl/KITLG) protein and mRNA expression and promoter activity by activating several signaling pathways. PMID: 24116170 Cardiomyocyte-specific overexpression of SCF protects the heart from myocardial ischemia reperfusion injury. PMID: 23680593 Data indicate that stem cell factor (SCF) was expressed in differentiating dental pulp. PMID: 23703692 Seborrheic keratosis cells do not respond to IL-1alpha or TNF-alpha to stimulate production of SCF, whereas a significant stimulation of SCF is elicited by those same cytokines in normal human keratinocytes. PMID: 23662587 Study uncovered a single-nucleotide polymorphism in a functional p53-binding site and establish its influence on the ability of p53 to bind to and regulate transcription of the KITLG gene. The SNP resides in KITLG and associates with one of the largest risks identified among cancer genome-wide association studies. PMID: 24120139 N-linked carbohydrate modifiers affect stem cell factor and endothelin-1-stimulated epidermal pigmentation in human epidermal equivalents PMID: 23273644 RIN3 is a negative regulator of mast cell responses to SCF PMID: 23185384 this is the first report to determine the significant contribution of SCF autoproduction to neoplastic proliferation of mast cells PMID: 23125456 A unique requirement for KIT Ligand in the upregulation of glucocorticoid receptor alpha isoform and optimal erythroblast expansion in cultures that mimic stress erythropoiesis. PMID: 22533504 Stem cell factor was expressed in all tumour subgroups, with the highest in oncocytomas and papillary renal cell carcinomas. Stem cell factor correlated positively with the cytoplasmic expression of KIT. PMID: 23060556 Elevated plasma levels of SCF are associated with inflammatory bowel disease with JCV infection. PMID: 22467521 The KITLG (rs4474514) variants were significantly associated with germ cell tumors only in the adolescent age group. PMID: 22072546

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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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