Recombinant Human Alpha-tocopherol transfer protein(TTPA)

Code CSB-EP025268HU
Size US$2466
  • (Tris-Glycine gel) Discontinuous SDS-PAGE (reduced) with 5% enrichment gel and 15% separation gel.

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Product Details

Purity Greater than 90% as determined by SDS-PAGE.
Target Names TTPA
Uniprot No. P49638
Research Area Signal Transduction
Alternative Names Alpha-tocopherol transfer protein; Alpha-TTP; AlphaTTP; ATTP; AVED; Tocopherol (alpha) transfer protein (ataxia (Friedreich-like) with vitamin E deficiency); TTP1; TTPA; TTPA_HUMAN
Species Homo sapiens (Human)
Source E.coli
Expression Region 1-278aa
Note: The complete sequence including tag sequence, target protein sequence and linker sequence could be provided upon request.
Mol. Weight 47.7kDa
Protein Length Full Length
Tag Info N-terminal 6xHis-SUMO-tagged
Form Liquid or 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 If the delivery form is liquid, the default storage buffer is Tris/PBS-based buffer, 5%-50% glycerol.
Note: If you have any special requirement for the glycerol content, please remark when you place the order.
If the delivery form is lyophilized powder, the buffer before lyophilization is 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°C/-80°C. Our default final concentration of glycerol is 50%. Customers could use it as reference.
and FAQs
Protein FAQs
Storage Condition Store at -20°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.
Notes Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.
Datasheet & COA Please contact us to get it.

Target Data

Function Binds alpha-tocopherol, enhances its transfer between separate membranes, and stimulates its release from liver cells
Gene References into Functions
  1. alphaTTP does not appear to regulate the uptake and intracellular localization of different vitamin E congeners in cultured liver cells. PMID: 30098456
  2. These findings provide the basis for a proposed mechanistic model that describes TTP-facilitated trafficking of alpha-tocopherol through hepatocytes. PMID: 27307040
  3. Current results show that alphaTTP plays a role in endometrial carcinoma. Possibly endometrial cancer cells attempt to protect themselves from increasing oxidative stress by up-regulating alphaTTP. PMID: 28213729
  4. Single-nucleotide polymorphisms that are commonly found in healthy humans dramatically affect promoter activity of the TTPA gene. PMID: 23079030
  5. The crystal structure of the alpha-TTP-phosphatidylinositol phosphates (PIPs) complex revealed that the familial vitamin E deficiency-related arginine residues interacted with phosphate groups of the PIPs and that the PIPs binding caused the lid of the alpha-tocopherol-binding pocket to open. PMID: 23599266
  6. study demonstrated that alpha -TTP can be upregulated in case of oxidative stress in BeWo trophoblast cells; speculate that possibly, alpha -TTP is notonly involved in normal pregnancy, but also in cases of pregnancy disorders with intense oxidative stress PMID: 22752767
  7. Data show that reduction ("knockdown") of tocopherol transfer protein (TTP) expression resulted in resistance to the vitamin E. PMID: 20826775
  8. Substitution of residues in helices A8 (F165A and F169A) and A10 (I202A, V206A and M209A) decreased the rate of intermembrane ligand transfer as well as protein adsorption to phospholipid bilayers. PMID: 21110980
  9. First case of a mutated form of the TTPA gene in a patient also carrying a spinocerebellar ataxia type 8 expansion. PMID: 12470185
  10. crystal structure reveals two conformations PMID: 12899840
  11. the positively charged surface of TTPA may serve to orient an interacting protein, which might function to regulate the release of alpha-T through an induced change in conformation of ATTP PMID: 14657365
  12. Findings suggest the possibility that ataxia with vitamin E deficiency syndrome (AVED) may not arise from an inability of TTP to bind or to transfer alpha tocopherol, but rather from defects in other activities of the protein. PMID: 15065857
  13. Nuclear localization of TTPA in in trophoblast, fetal capillaries' endothelium and amnion epithelium of human term placentamay represent a novel function of TTPA PMID: 15190938
  14. In Ataxia with vitamin E deficiency two TTPA mutations were identified: a truncating mutation in a homozygous patient, and a Gly246Arg missense mutation in a compound heterozygous patient associated with a mild and slowly progressive form of the disease. PMID: 15300460
  15. The physiological role of TTP is anchored in its ability to direct vitamin E trafficking from the endocytic compartment to transport vesicles that deliver the vitamin to the site of secretion at the plasma membrane. PMID: 16819822
  16. analysis of ligand transfer by the hepatic tocopherol transfer protein PMID: 18458085
  17. in first-trimester extravillous trophoblast, syncytiotrophoblast and amniotic epithelium PMID: 18511174
  18. The vitamin E deficiency with hereditary motor neuropathy was found to be homozygous for a 513insTT mutation in exon 3 of the alpha-tocopherol transfer protein gene. PMID: 18984846
  19. Total deletion of the TTPA gene is expected to be associated with severe phenotype in AVED patients. PMID: 19102053
  20. Genetic variation in TTPA and SEC14L2 is associated with serum alpha-tocopherol but does not have a direct effect on prostate cancer when vitamin E is administered. PMID: 19190344
  21. Hydrophobic features of alpha-TTP dominating the binding energy between protein and membrane. PMID: 19458973

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Involvement in disease Ataxia with isolated vitamin E deficiency (AVED)
Subcellular Location Cytoplasm
Database Links

HGNC: 12404

OMIM: 277460

KEGG: hsa:7274

STRING: 9606.ENSP00000260116

UniGene: Hs.69049

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