Recombinant Human Claudin-9 (CLDN9)-VLPs (Active)

In Stock
Code: CSB-MP005511HU
Size:
20ug
20ug100ug1mg
US$558
Quantity:
Express system: Mammalian cell
Species: Homo sapiens (Human)
Tag Info: C-terminal 10xHis-tagged (This tag can be tested only under denaturing conditions)
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Product Details

Abbreviation
Recombinant Human CLDN9 protein-VLPs (Active)
Endotoxin
Less than 1.0 EU/ug as determined by LAL method.
Activity
Measured by its binding ability in a functional ELISA. Immobilized Human CLDN9 at 10 μg/mL can bind Anti-CLDN6/9 recombinant antibody (CSB-RA005508MA1HU), the EC50 is 24.93-35.47 ng/mL.
Target Names
CLDN9
Uniprot NO.
Molecular Characterization
Species
Homo sapiens (Human)
Source
Mammalian cell
Expression Region
1-217aa
Target Protein Sequence
MASTGLELLGMTLAVLGWLGTLVSCALPLWKVTAFIGNSIVVAQVVWEGLWMSCVVQSTGQMQCKVYDSLLALPQDLQAARALCVIALLLALLGLLVAITGAQCTTCVEDEGAKARIVLTAGVILLLAGILVLIPVCWTAHAIIQDFYNPLVAEALKRELGASLYLGWAAAALLMLGGGLLCCTCPPPQVERPRGPRLGYSIPSRSGASGLDKRDYV
Note: The complete sequence may include tag sequence, target protein sequence, linker sequence and extra sequence that is translated with the protein sequence for the purpose(s) of secretion, stability, solubility, etc.
If the exact amino acid sequence of this recombinant protein is critical to your application, please explicitly request the full and complete sequence of this protein before ordering.
Mol. Weight
24.2 kDa
Protein Length
Full Length
Tag Info
C-terminal 10xHis-tagged (This tag can be tested only under denaturing conditions)
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.
Buffer
Lyophilized from a 0.2 μm filtered PBS, 6% Trehalose, pH 7.4
Storage
Store at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. Avoid repeated freeze-thaw cycles.
Lead Time
Basically, we can dispatch the products out in 3-7 working days after receiving your orders. 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.
Shelf Life
The shelf life is related to many factors, storage state, storage temperature and the stability of the product itself. Generally, the shelf life of lyophilized form is 6 months at -20°C/-80°C from the date of receipt.
Troubleshooting and FAQs
Datasheet & COA
Please contact us to get it.
Images
  • CSB-MP005511HU is detected by Mouse anti-6*His monoclonal antibody.
  • Activity
    Measured by its binding ability in a functional ELISA. Immobilized Human CLDN9 at 10 μg/ml can bind Anti-CLDN6/9 recombinant antibody (CSB-RA005508MA1HU), the EC50 is 24.93-35.47 ng/mL.
Description

Claudin-9 plays a critical role in tight junction integrity and has emerged as a target of interest in tumor metastasis research, where its dysregulation influences paracellular permeability and cancer cell invasion. This recombinant human CLDN9 is presented on virus-like particles (VLPs) to preserve native transmembrane topology and conformational epitopes—a key advantage for studying multi-pass membrane proteins that lose structural fidelity when solubilized. Functional ELISA confirms binding to an anti-CLDN6/9 recombinant antibody with an EC50 of 24.93–35.47 ng/mL, supporting use in antibody development and validation, integrin-ligand or selectin-ligand binding studies, and cell migration and invasion assays relevant to metastasis biology. The full-length construct (aa 1–217) with a C-terminal 10xHis tag, expressed in mammalian cells and carrying endotoxin levels below 1.0 EU/μg, provides a suitable basis for functional screening in cancer-focused immunological workflows.

Customer Reviews and Q&A

 Customer Reviews
Average Rating:
5.0 - 1 reviews

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Applications : Drug related studies

Review: CLDN9 is considered a potential target for the treatment of cancer and other diseases. It is a four-times transmembrane protein that is very difficult to express the full-length protein. The recombinant human CLDN9 protein expressed by CUSABIO through its VLP platform has complete biological activity. I used the CSB-MP005511HU product and the anti-CLDN9 antibody (CSB-RA005508MA1HU) for an ELISA experiment, and the EC50 was measured to be 0.8032-2.566 ng/ml. Our company has purchased many VLP proteins from CUSABIO, and they have all demonstrated excellent activity, making significant contributions to our drug development and research. CUSABIO is a powerful company since its VLP products are very distinctive.

By Anonymous

Target Background

Function(From Uniprot)
Plays a major role in tight junction-specific obliteration of the intercellular space, through calcium-independent cell-adhesion activity.; (Microbial infection) Acts as a receptor for hepatitis C virus (HCV) entry into hepatic cells.
Gene References into Functions
  1. CLDN9 may be an important biomarker for invasive pituitary oncocytomas. PMID:25281028
  2. Claudins 6, 7, and 9 expressions are closely related to gastric carcinogenesis. PMID:19960275
  3. Mouse studies suggest that claudin-9 deficiency may cause hearing loss not only in mice but also in humans. PMID:19696885
  4. Residues N38 and V45 in the first extracellular loop (EL1) of CLDN9 are necessary for HCV entry. PMID:17804490
  5. CLDN9, clustered with CLDN6 at human chromosome 16p13.3, is a four-transmembrane protein with WWCC motif, defined by W-X(17-22)-W-X(2)-C-X(8-10)-C. PMID:12736707

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Subcellular Location
Cell junction, tight junction. Cell membrane; Multi-pass membrane protein.
Protein Families
Claudin family
Tissue Specificity
Expressed in the liver, in peripheral blood mononuclear cells and hepatocarcinoma cell lines.
Database Links

HGNC: 2051

UNIGENE: Hs.296949

KEGG: hsa:9080

STRING: 9606.ENSP00000398017

OMIM: 615799

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