Biotinylated Human CD7 Protein (C-6His-Avi)

Beta LifeScience SKU/CAT #: BL-2792NP
BL-2792NP: Greater than 95% as determined by reducing SDS-PAGE. (QC verified)
BL-2792NP: Greater than 95% as determined by reducing SDS-PAGE. (QC verified)

Biotinylated Human CD7 Protein (C-6His-Avi)

Beta LifeScience SKU/CAT #: BL-2792NP
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Product Overview

Description Biotinylated Recombinant Human T-Cell Antigen CD7 is produced by our Mammalian expression system and the target gene encoding Ala26­Pro180 is expressed with a 6His, Avi tag at the C-terminus.
Accession P09564
Synonym T-Cell Antigen CD7; GP40; T-Cell Leukemia Antigen; T-Cell Surface Antigen Leu-9; TP41; CD7
Gene Background T-Cell Antigen CD7 is a single-pass type I membrane protein that that belongs to the the immunoglobulin superfamily. Human CD7 is synthesized as a 240 amino acid precursor that contains a 25 amino acid signal sequence and a 215 amino acid mature chain with a Ig-like (immunoglobulin-like) domain. CD7 is normally expressed on all T-lymphocytes, NK-cells, pre-B lymphocytes and pleuripotent hematopoietic stem cells. CD7 plays an essential role in T-cell interactions, T-cell/B-cell interaction during early lymphoid development, T- and NK-cell activation and cytokine production. CD7 has been shown to interact with PIK3R1and SECTM1. However, the function of the CD7 protein in the immune system is still largely unknown.
Molecular Mass 19.3 KDa
Apmol Mass 30-35 KDa, reducing conditions
Formulation Lyophilized from a 0.2 μm filtered solution of PBS, pH 7.4.
Endotoxin Less than 0.1 ng/µg (1 EU/µg) as determined by LAL test.
Purity Greater than 95% as determined by reducing SDS-PAGE. (QC verified)
Biological Activity Not tested
Reconstitution Always centrifuge tubes before opening. Do not mix by vortex or pipetting. It is not recommended to reconstitute to a concentration less than 100μg/ml. Dissolve the lyophilized protein in distilled water. Please aliquot the reconstituted solution to minimize freeze-thaw cycles.
Storage Lyophilized protein should be stored at ≤ -20°C, stable for one year after receipt. Reconstituted protein solution can be stored at 2-8°C for 2-7 days. Aliquots of reconstituted samples are stable at ≤ -20°C for 3 months.
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature listed below.
Usage For Research Use Only

Target Details

Target Function Not yet known.
Subcellular Location Membrane; Single-pass type I membrane protein.
Database References

Gene Functions References

  1. in acute myeloid leukemia patients the association of CD7 positivity and FLT3 positivity was found to be significant PMID: 25679063
  2. Data show that CD7 promotes extramedullary involvement of the B-ALL line Tanoue in an integrin beta2-dependent manner. PMID: 24920488
  3. We showed that the CADM1 versus CD7 plot is capable of discriminating clonally expanding HTLV-I-infected cells in indolent and acute-type T-cell leukemia-lymphomas and in asymptomatic carriers PMID: 24727323
  4. CD7 is present on monocytes and tumor macrophages and its ligand, SECTM1, is frequently expressed in corresponding melanoma tissues PMID: 24157461
  5. SECTM1 secreted from bone marrow stromal cells may interact with CD7 to influence GM-CSF expression in leukemic cells. PMID: 24211252
  6. epigenetic down-regulation of CD7 is associated with acute myeloid leukemia. PMID: 20398252
  7. CD7 loss in aggressive natural killer-cell leukemia; a useful diagnostic marker PMID: 20046078
  8. low expression in T-cell lymphomas due to Twist2-mediated suppression of promoter activity; enhanced by histone deacetylase inhibitors PMID: 19937140
  9. These findings indicate a link between epigenetic modifications and CD7 expression in primitive chronic myeloid leukemia cells. PMID: 20175919
  10. CD7 expression in hematopoitic cells denotes commitment to B-cell and natural killer cells lineages. PMID: 12393702
  11. Association of T cell antigen CD7 with type II phosphatidylinositol-4 kinase, a key component in pathways of inositol phosphate turnover. PMID: 12594831
  12. a novel fusion protein, designated scFvCD7:sFasL is designed to have leukemia-restricted activity. PMID: 16332967
  13. Patients expressing CD7 had significant shorter disease free (DFS) and post-remission survivals (PRS) than patients without CD7 (DFS of 12 months versus 42 months, P=0.005; PRS of 15 months versus 33 months, P=0.013). PMID: 16837044
  14. CD7 antigen notably expresses in lung microvascular endothelial cells (LME) and that it acts as an Fc receptor for IgM in LME cells. PMID: 16990185
  15. HTLV-IInfected cells acquired a profound decrease of intracellular calcium levels in response to ionomycin, timely correlated with decreased CD7 expression PMID: 17287851
  16. differential levels of CD7 identify the progressive stages of lineage commitment in human thymus, initiated from a primitive CD7(-) lympho-myeloid thymic progenitor PMID: 17959857
  17. close association of aberrant CD7 expression and FLT3/ITD mutation in the myeloblasts of FLT3/ITD+ acute myeloid leukemia suggests that FLT3/ITD- mediated leukemic transformation occurs in the more early stage of myeloid progenitor cells PMID: 18343790
  18. The CD7 expression in CD4(+) T cells discriminates between HL and reactive LAD, suggesting that this could be a useful and practical adjunctive tool in the diagnosis of Hodgkin lymphoma. PMID: 18956470
  19. by down-regulating CD7, ATLL cells could have escaped Gal-3-induced apoptosis to run a more aggressive clinical course PMID: 19207946
  20. the galectin-1 glycoprotein receptor CD7 maybe a novel target for GdA on T cells. PMID: 19683346

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.

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