Recombinant Human DBI Protein (His Tag)

Beta LifeScience SKU/CAT #: BLPSN-1547

Recombinant Human DBI Protein (His Tag)

Beta LifeScience SKU/CAT #: BLPSN-1547
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Product Overview

Tag His
Host Species Human
Accession P07108
Background The diazepam binding inhibitor (DBI), alternatively known as the acyl-CoA binding protein (ACBP), is involved in multiple biological actions. The polypeptide binds to the peripheral, or mitochondrial, benzodiazepine receptor and facilitates transport of cholesterol to the inner membrane to stimulate steroid synthesis. Through this action, DBI indirectly modulates gamma-aminobutyric acid (GABA)-mediated inhibitory neurotransmission. DBI can be postulated as a candidate gene for psychiatric phenotypes including anxiety, mood, and psychotic disorders. Diazepam Binding Inhibitor (DBI), also called acyl-CoA binding protein (ACBP), is a ubiquitously expressed protein originally identified based on its ability to displace diazepam from its binding site on the GABAA receptor. The mutant allele of the DBI was one of the risk factors for alcohol dependence as for the rs2276596 polymorphism.
Description A DNA sequence encoding the human DBI (P07108-2) (Met1-Ala87) was expressed with a His tag at the N-terminus.
Source E.coli
Predicted N Terminal His
AA Sequence Met1-Ala87
Molecular Weight The recombinant human DBI consists of 122 a.a. and predicts a molecular mass of 14 KDa. It migrates as an approximately 18 KDa band in SDS-PAGE under reducing conditions.
Purity >95% as determined by SDS-PAGE
Endotoxin Please contact us for more information.
Bioactivity Please contact us for detailed information
Formulation Lyophilized from sterile PBS, pH 7.4..
Stability The recombinant proteins are stable for up to 1 year from date of receipt at -70°C.
Usage For Research Use Only
Storage Store the protein under sterile conditions at -20°C to -80°C. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.

Target Details

Target Function Binds medium- and long-chain acyl-CoA esters with very high affinity and may function as an intracellular carrier of acyl-CoA esters. It is also able to displace diazepam from the benzodiazepine (BZD) recognition site located on the GABA type A receptor. It is therefore possible that this protein also acts as a neuropeptide to modulate the action of the GABA receptor.
Subcellular Location Endoplasmic reticulum. Golgi apparatus.
Protein Families ACBP family
Database References
Tissue Specificity Isoform 1 is ubiquitous, with a moderate expression level. Isoform 2 is ubiquitous with high level in liver and adipose tissue. Isoform 3 is ubiquitous with strong expression in adipose tissue and heart.

Gene Functions References

  1. ACBP increases the activity of ceramide synthase 2 (CerS2) by more than 2-fold and CerS3 activity by 7-fold. ACBP binds very-long-chain acyl-CoA esters, which is required for its ability to stimulate CerS activity. PMID: 28320857
  2. Serum endozepine-4 levels are increased in hepatic coma. PMID: 26290636
  3. Structural and functional properties of ACBD1, commonly known as ACBP. [Review] PMID: 25898985
  4. High ACBP expression is associated with non-small cell lung cancer. PMID: 24819876
  5. results indicate that a dysfunction of the neurosteroid system might be operative in BPD in spite of unchanged DBI plasma levels. PMID: 24401326
  6. There was a significant difference in the rs2276596 polymorphism C/A allele frequency of the DBI gene (P < 0.0001) between alcoholics and healthy controls. PMID: 24818357
  7. Acyl-CoA binding protein and epidermal barrier function. [review] PMID: 24080521
  8. Endogenous potentiation of GABAergic synaptic transmission and responses to GABA uncaging in the thalamic reticular nucleus is absent in mice in which DBI is deleted and mice in which benzodiazepine binding to alpha3 subunit-containing GABAARs is disrupted. PMID: 23727119
  9. A human preadipocyte cell line SGBS is well suited to examine differential expression of the Acyl-CoA binding protein (ACBP) during adipogenesis. PMID: 21448843
  10. The regulation of novel low-abundance transcript variants of human acyl-CoA binding protein, was analysed. PMID: 20345851
  11. Gene annotation enrichment analysis revealed ACBP-mediated down-regulation of 18 genes encoding key enzymes in glycerolipid, cholesterol and fatty acid metabolism. PMID: 20511713
  12. Data suggest that the presence of gamma-glutamyl hydrolase and diazepam-binding inhibitor in urine serves as a rationale for developing them as urinary markers of clinical outcomes for patients treated with neoadjuvant chemotherapy. PMID: 19815704
  13. PPRE in intron 1 of the ACBP gene is a bona fide PPARgamma-response element. PMID: 12015306
  14. ACBP has a role as an essential protein in human cells PMID: 12396232
  15. Missense changes in diazepam binding inhibitorwere not associated with schizophrenia PMID: 14755437
  16. Data show for the first time in a physiological context that transgenic expression of acyl-coenzyme A binding protein may play a role in liver fatty acyl-coenzyme A metabolism. PMID: 16042405
  17. Results identify new acyl-CoA binding protein transcripts in human and mouse tissues, generated by alternative first exon usage. PMID: 16055366
  18. Acyl coenzyme A-binding protein has a role in augmenting bid-induced mitochondrial damage and cell death by activating mu-calpain PMID: 16908521
  19. Here high resolution crystal structures of human cytosolic liver ACBP, unliganded and liganded with a physiological ligand, myristoyl-CoA are described. The binding of the acyl-CoA molecule induces only few structural differences near the binding pocket PMID: 17044054
  20. we obtained evidence from two Caucasian study populations that the minor allele of ACBP rs2084202 might be associated with reduced risk of type 2 diabetes PMID: 17262885
  21. study found a significant difference in the +529A/T (rs8192503) polymorphism allele frequency of the DBI gene between the alcoholics & controls; data suggest that mutation allele of the DBI gene polymorphism was one of the risk factors for alcoholism PMID: 18240651
  22. ACBP is a transcriptional regulator of the HMGCS1 and HMGCR genes encoding rate-limiting enzymes of cholesterol synthesis pathway. PMID: 19088433


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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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