Recombinant Human Folate receptor alpha (FOLR1)

Code CSB-YP008784HU
MSDS
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Source Yeast
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Code CSB-EP008784HU
MSDS
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Source E.coli
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Code CSB-EP008784HU-B
MSDS
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Source E.coli
Conjugate Avi-tag Biotinylated
E. coli biotin ligase (BirA) is highly specific in covalently attaching biotin to the 15 amino acid AviTag peptide. This recombinant protein was biotinylated in vivo by AviTag-BirA technology, which method is BriA catalyzes amide linkage between the biotin and the specific lysine of the AviTag.
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Code CSB-BP008784HU
MSDS
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Source Baculovirus
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Code CSB-MP008784HU
MSDS
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Source Mammalian cell
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Product Details

Purity
>85% (SDS-PAGE)
Target Names
FOLR1
Uniprot No.
Alternative Names
adult; Adult folate binding protein; Adult folate-binding protein; FBP; Folate Binding Protein; Folate Receptor 1 Adult; Folate receptor 1; Folate Receptor 1 Precursor; Folate receptor adult; Folate receptor alpha; Folate receptor; FOLR; FOLR1; FOLR1_HUMAN; FR alpha; FR-alpha; FRalpha ; KB cells FBP; MOV18; Ovarian cancer associated antigen ; Ovarian tumor associated antigen ; Ovarian tumor associated antigen MOv18; Ovarian tumor-associated antigen MOv18
Species
Homo sapiens (Human)
Expression Region
25-234
Target Protein Sequence
RIAWAR TELLNVCMNA KHHKEKPGPE DKLHEQCRPW RKNACCSTNT SQEAHKDVSY LYRFNWNHCG EMAPACKRHF IQDTCLYECS PNLGPWIQQV DQSWRKERVL NVPLCKEDCE QWWEDCRTSY TCKSNWHKGW NWTSGFNKCA VGAACQPFHF YFPTPTVLCN EIWTHSYKVS NYSRGSGRCI QMWFDPAQGN PNEEVARFYA AAMS
Protein Length
Full Length of Mature Protein
Tag Info
Tag type will be determined during the manufacturing process.
The tag type will be determined during production process. If you have specified tag type, please tell us and we will develop the specified tag preferentially.
Form
Lyophilized powder
Note: We will preferentially ship the format that we have in stock, however, if you have any special requirement for the format, please remark your requirement when placing the order, we will prepare according to your demand.
Buffer before Lyophilization
Tris/PBS-based buffer, 6% Trehalose, pH 8.0
Reconstitution
We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20℃/-80℃. Our default final concentration of glycerol is 50%. Customers could use it as reference.
Troubleshooting and FAQs
Storage Condition
Store at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. Avoid repeated freeze-thaw cycles.
Shelf Life
The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself.
Generally, the shelf life of liquid form is 6 months at -20°C/-80°C. The shelf life of lyophilized form is 12 months at -20°C/-80°C.
Lead Time
Delivery time may differ from different purchasing way or location, please kindly consult your local distributors for specific delivery time.
Note: All of our proteins are default shipped with normal blue ice packs, if you request to ship with dry ice, please communicate with us in advance and extra fees will be charged.
Notes
Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.
Datasheet
Please contact us to get it.

Customer Reviews and Q&A

 Customer Reviews

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 Q&A
Q:

I am only interested in the protein if they can be delivered without a tag, or certainly no his-tag as this will interfere with our assay.

A:
Thanks for your inquiry. We could provide the tag removal service.
Tag removal service::
We can try enzyme digestion, but we can't guarantee 100% successfully. The overall success rate of enzyme digestion data analysis is 75%-86%.
Not all protein tags can be removed as some proteins will be very unstable after tag removal.
If we succeed in removing the tag, we will charge for extra cost. Our distributor will quote you the price.
If we fail in removing the tag, we won’t charge for any extra cost, and remark this information in datasheet as follows
“Note: The laboratory determined that the Tag on your protein could not be removed with standard laboratory procedures. Your protein is being supplied with the Tag intact.”
Generally, the delivery time will be extended for 3 days.
Please feel free to contact me if you need additional information or assistance.

Target Background

Function
Binds to folate and reduced folic acid derivatives and mediates delivery of 5-methyltetrahydrofolate and folate analogs into the interior of cells. Has high affinity for folate and folic acid analogs at neutral pH. Exposure to slightly acidic pH after receptor endocytosis triggers a conformation change that strongly reduces its affinity for folates and mediates their release. Required for normal embryonic development and normal cell proliferation.
Gene References into Functions
  1. This study demonstrated a new approach using a combination of EpCAM and FRalpha as CTC-capture targets to increase the sensitivity of CTC detection in NSCLC efficiently, specifically, and quickly. PMID: 29352248
  2. Several experimental studies in mice and human epidemiological and genetics studies have suggested that FOLR1 abnormalities are involved in a portion of human neural tube defects (NTD), although the solo defect of FOLR1 did not cause NTD. (Review) PMID: 28244241
  3. that FOLR1 is highly expressed in ovarian cancer but is reduced following multidrug resistance. FOLR1 may be a useful biomarker for ovarian cancer, and it may be useful as a therapeutic application to improve sensitivity to cisplatin treatment PMID: 29433550
  4. mTORC1 or mTORC2 silencing markedly decreases the plasma membrane expression of FR-alpha and RFC transporter isoforms without affecting global protein expression PMID: 27562465
  5. High Folate Receptor Alpha Expression Is Associated With Increased Risk of Recurrence in Triple-negative Breast Cancer. PMID: 28410844
  6. The expression of folate receptor 1 (FOLR1) was significantly higher and occurred with higher frequency in metastatic lymph node samples from patients with advanced lung cancer. PMID: 29110850
  7. We identified eight novel variants in SLC19A1 and twelve novel variants in FOLR1, FOLR2, and FOLR3. Pathogenic variants include c.1265delG in SLC19A1 resulting in an early stop codon, four large insertion deletion variants in FOLR3, and a stop_gain variant in FOLR3 PMID: 28948692
  8. In this study, folate receptor alpha (FRa)-targeted nano-liposomes (FLP) were designed to enhance the anti-tumor effect by targeting delivery of exogenous PEDF gene to cervical cancer cells..These results clearly showed that FLP were desired carriers for PEDF gene and FLP/PEDF might represent a potential novel strategy for gene therapy of cervical cancer. PMID: 27576898
  9. Data show that higher folate receptor alpha (FRalpha) expression is predictive of a favorable prognosis in pancreatic ductal adenocarcinoma (PDAC) and FRalpha may represent a promising target for treatments. PMID: 28430580
  10. our results demonstrate the substantial therapeutic potential of novel 6-substituted pyrrolo[2,3-d]pyrimidine antifolates with dual targeting of PCFT and FRalpha toward Epithelial ovarian cancer that express a range of FRalpha, along with PCFT, as well as cisplatin resistance PMID: 28138029
  11. Low expression level of FOLR1 is associated with neuroendocrine lung tumors. PMID: 27064343
  12. FolR1 is a predictive candidate and a therapeutic target for medulloblastoma. PMID: 28416738
  13. Folr1 is a favorable target for fluorescence-guided surgery as tumor specific agent EC17 produced a clear fluorescent signal in ovarian and breast cancer tissue. PMID: 27014973
  14. The Folate receptor alpha is associated with the progression of cervical cancer and regulates cervical cancer cells growth through phosphorylating ERK1/2, c-Fos, and c-Jun, which are key factors of the ERK signaling pathway. PMID: 28782518
  15. Folate receptor alpha protein was expressed in the majority of lung adenocarcinomas and a minority of lung squamous cell carcinomas. Folate receptor alpha protein expression correlated with histologic grade for lung adenocarcinomas, and the greatest difference was observed between grade 1 and grade 3. PMID: 26599808
  16. The present study shows the efficacy of silencing HuR in lung cancer cells using folate-conjugated nanoparticle system that is directed towards folate receptor-alpha overexpressing cancer cells. PMID: 27328938
  17. This new protocol opens an effective way through synthesis and design of novel fluorescent nano-conjugates for FR expression investigation in tumor cells via targeted imaging, showing great potential in drug delivery mechanism study and cancer therapy PMID: 26606305
  18. Suppression of FOLR1 by RNA interference altered gene expression profile of taxol-resistant nasopharyngeal carcinoma cells. Apoptosis-related genes, gene alterations in viral carcinogenesis/MAPK pathways may be important for taxol resistance reversal. PMID: 26617855
  19. we confirmed the similarities between epithelial ovarian cancer and fallopian tube, normal and adenocarcinoma using FOLR1, FOLR2, CD68 and CD11b markers PMID: 25971554
  20. Suggest RNA CAR T cell therapy for the treatment of common epithelial cancers expressing folate receptor-alpha. PMID: 26359629
  21. Folate receptor expression on murine and human adipose tissue macrophages PMID: 26149693
  22. Findings suggest the clinical development of IMGN853 as a novel targeted therapy for patients with folate receptor alpha (FRalpha)-expressing tumors. PMID: 25904506
  23. Suggest that FRalpha overexpression may play a role in the endometrioid endometrium carcinoma carcinogenesis and carcinoma progression from endometrial hyperplasia. PMID: 26191275
  24. triple negative/basal tumors were significantly associated with increased expression of FOLR1 mRNA, compared to ER+ and HER2+ tumors. PMID: 25816016
  25. Molecular dynamic simulation of the binding process of folic acid to folate receptor alpha PMID: 25323390
  26. Studies indicate folate receptor (FR) as a prognostic biomarker for ovarian cancer. PMID: 25564455
  27. The overexpression of folate receptor alpha mRNA was associated with growth of pituitary adenomas. PMID: 26014017
  28. this is the first study to simultaneously evaluate both DNA methylation and protein expression of all three folate transporter genes, FOLR1, PCFT, and RFC1, in colorectal cancer. PMID: 25697897
  29. FRalpha down-regulation might be capable of suppressing cervical cancer cell proliferation and promoting apoptosis. PMID: 25081683
  30. Survival times are improved in non-small-cell lung cancer patients whose tumors show strong membranous folate receptor alpha expression. PMID: 24993594
  31. the conditions associated with circulating FOLR1 protein in healthy individuals PMID: 24810481
  32. We concluded that quantitation of CTCs through FRalpha ligand-PCR could be a promising method for noninvasive diagnosis of bladder TCC. PMID: 24771263
  33. 74% of ER/PR-negative and 80% of triple-negative breast cancers expressed folate receptor alpha (FRA). The expression of FRA was significantly associated with a worse disease-free survival. PMID: 24028341
  34. Expression of FOLR1 is higher in pituitary adenomas of patients who are older than 50 years. PMID: 23023342
  35. FOLR1 was significantly elevated in the serum of ovarian cancer patients compared to serum of both healthy controls and patients with benign gynecological conditions. PMID: 23528302
  36. The FRalpha gene was expressed in all parathyroid cells analyzed, and the FRbeta gene was expressed by most. PMID: 24206618
  37. crystal structure of human FRalpha in complex with folic acid at 2.8 A resolution PMID: 23851396
  38. The data presented further support the hypothesis that folate receptor-alpha expression in gynecologic tumors is due to the cell of origin normally expressing this receptor PMID: 23518909
  39. EpCAM, FR-alpha, and VEGF-A are the most promising molecules for use in targeted intraoperative fluorescence imaging of endometriotic lesions owing to their favorable expression patterns and biomarker characteristics PMID: 23332132
  40. Studies indicate that folate receptor alpha (FOLR1), a folate transporter, is an attractive target for cancer therapy due to its high affinity for folate, restricted range of expression in normal tissue and differential over-expression in malignant tissue. PMID: 23357463
  41. Overexpression of folate receptor alpha was associated with ovarian tumor progression. PMID: 23144806
  42. The folate receptor alpha translocates to the nucleus, where it binds to cis-regulatory elements at promoter regions of Fgfr4 and Hes1, and regulates their expression. PMID: 23243496
  43. a large percentage of lung cancers, including squamous cell carcinomas in addition to adenocarcinomas, strongly express folate receptor alpha PMID: 22984810
  44. PCR analysis had confirmed the existence of FR-alpha, SMVT, and B ((0, +)) in Y-79 and ARPE-19 cells. PMID: 22304562
  45. High folate receptor alpha is associated with adenocarcinoma in non-small-cell lung carcinoma and and EGFR [corrected] mutation. PMID: 22729036
  46. alpha-FR can be a potential biomarker for the prediction of chemotherapeutic responses and clinical prognosis. PMID: 22265591
  47. studies suggest that different clinical severities do not necessarily correlate with residual function of folate receptor alpha mutants. PMID: 22586289
  48. FR-alpha was expressed in the majority of serous ovarian tumors, although >50% of cases showed only weak expression. PMID: 21647742
  49. FRalpha may play an important role in the development and progression of NFAs. PMID: 22089756
  50. An ancient double-mutated haplotype 1816delC-1841A in the FOLR1 gene, is demonstrated. PMID: 21938430

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Involvement in disease
Neurodegeneration due to cerebral folate transport deficiency (NCFTD)
Subcellular Location
Cell membrane; Lipid-anchor, GPI-anchor. Secreted. Cytoplasmic vesicle. Cytoplasmic vesicle, clathrin-coated vesicle. Endosome. Apical cell membrane. Note=Endocytosed into cytoplasmic vesicles and then recycled to the cell membrane.
Protein Families
Folate receptor family
Tissue Specificity
Primarily expressed in tissues of epithelial origin. Expression is increased in malignant tissues. Expressed in kidney, lung and cerebellum. Detected in placenta and thymus epithelium.
Database Links

HGNC: 3791

OMIM: 136430

KEGG: hsa:2348

STRING: 9606.ENSP00000308137

UniGene: Hs.73769

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