Recombinant Human Vesicle-associated membrane protein-associated protein B/C (VAPB), partial (Active), Homo sapiens (Human), E.coli, C-terminal 6xHis-tagged, 16 kDa, purity >90% as determined by SDS-PAGE.

Recombinant Human Vesicle-associated membrane protein-associated protein B/C (VAPB), partial (Active)

Recombinant Human Vesicle-associated membrane protein-associated protein B/C (VAPB), partial (Active) — Endoplasmic reticulum (ER)-anchored protein that mediates the formation of contact sites between the ER and endosomes via interaction with FFAT motif-containing proteins such as STARD3 or WDR44.

SKU: BCACP-001083 Category:
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Product SKUBCACP-001083
Product DescriptionRecombinant Human Vesicle-associated membrane protein-associated protein B/C (VAPB) protein is expressed from E.coli with C-terminal 6xHis-tagged. It contains 2-132aa. [Accession | O95292].
Uniprot No.O95292
Gene NamesVAPB
PurityGreater than 90% as determined by SDS-PAGE.
Expression SystemE.coli
Expression Region2-132aa
SpeciesHomo sapiens (Human)
Tag InfoC-terminal 6xHis-tagged
Molecular weight16 kDa
ActivityMeasured by its ability to catalyze the reduction of insulin.The reaction leads to precipitation, which can be measured by absorbance at 650 nm. The specific activity is 0.2-1 Abs/min/mg as measured under the described conditions.
BufferLyophilized from a 0.2 μm filtered 20 mM Tris-HCl, 0.5 M NaCl, 6% Trehalose, pH 8.0
StorageStore at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. Avoid repeated freeze-thaw cycles.
Alternative NamesVAPB; UNQ484/PRO983; Vesicle-associated membrane protein-associated protein B/C; VAMP-B/VAMP-C; VAMP-associated protein B/C; VAP-B/VAP-C

Function

Endoplasmic reticulum (ER)-anchored protein that mediates the formation of contact sites between the ER and endosomes via interaction with FFAT motif-containing proteins such as STARD3 or WDR44. Interacts with STARD3 in a FFAT motif phosphorylation dependent manner. Via interaction with WDR44 participates in neosynthesized protein export.

Product Specifications

Recombinant Human Vesicle-associated membrane protein-associated protein B/C (VAPB), partial (Active) is a recombinant protein, expressed in E.coli, covering amino acids 2-132aa, with C-terminal 6xHis-tagged tag, molecular weight 16 kDa, purity Greater than 90% as determined by SDS-PAGE.. Suitable for ELISA and Western Blot applications.

SDS-PAGE: Single band at expected molecular weight confirming purity.

ELISA: Suitable as coating antigen or detection standard.

Western Blot: Compatible with standard Western Blot protocols.

Protein Interaction: Validated for SPR (Surface Plasmon Resonance) and BLI (Bio-Layer Interferometry) studies.

Shipping: Shipped at ambient temperature. Lyophilized protein is stable during transit.

Storage: Store lyophilized protein at -20°C to -80°C. Reconstituted protein should be aliquoted and stored at -80°C. Avoid repeated freeze-thaw cycles.

Shelf Life: 12 months from date of receipt when stored as recommended.

Shipping Time: Orders placed before 2 PM EST ship same day. International orders typically deliver within 5-10 business days.

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Protein Biology

Function

Endoplasmic reticulum (ER)-anchored protein that mediates the formation of contact sites between the ER and endosomes via interaction with FFAT motif-containing proteins such as STARD3 or WDR44 (PubMed:32344433, PubMed:33124732). Interacts with STARD3 in a FFAT motif phosphorylation dependent manner (PubMed:33124732). Via interaction with WDR44 participates in neosynthesized protein export (PubMed:32344433). Participates in the endoplasmic reticulum unfolded protein response (UPR) by inducing ERN1/IRE1 activity (PubMed:16891305, PubMed:20940299). Involved in cellular calcium homeostasis regulation (PubMed:22131369)

Gene: VAPB  |  Organism: Homo sapiens

Frequently Asked Questions

How do I order or inquire about this product?

Fill out the Online Inquiry form with your required quantity and specifications. You can also email sales@biocrestsci.com. Our team typically responds within 4 business hours with a quote and availability confirmation.

What is the shipping and delivery time?

Orders placed before 2 PM EST ship the same day. Domestic (US) delivery typically takes 2-3 business days. International orders deliver within 5-10 business days. All products are shipped at ambient temperature with appropriate packaging to ensure stability.

How should I store this recombinant protein?

Lyophilized proteins should be stored at -20°C to -80°C upon receipt. After reconstitution, aliquot and store at -80°C. Avoid repeated freeze-thaw cycles. Shelf life is 12 months from date of receipt when stored as recommended.

What quality controls are performed on your products?

Each product undergoes SDS-PAGE purity analysis (typically >85-95%), endotoxin testing, and bioactivity validation. Products are validated for ELISA, Western Blot, and SPR/BLI applications as specified on this product page. A Certificate of Analysis (CoA) is available upon request.

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