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You are here:Home » Antibodies » Antibodies-Connexin, Junction Proteins » Anti -ZO-3, Mid (Tight Junction-associated Polypeptide, Zonula Occludens 3)

Anti -ZO-3, Mid (Tight Junction-associated Polypeptide, Zonula Occludens 3)


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Clone Host Grade Applications
Polyclonal Rabbit Affinity Purified E B IP IF
ZO-3, a ~130kD protein, contains three PSD-95/SAP90, discs-large, ZO-1 (PDZ) domains, a SH3 domain, and a guanylate kinase-liked domain. Like ZO-1 and ZO-2, ZO-3 contains a C-terminal acidic domain and a basic region (between the first and second PDZ domains), making it belongs to the MAGUK protein family. By Western Blot analysis, ZO-3 is identified as a ~130kD protein that directly interacts with tight junction proteins ZO-1 and occuldin, but not with ZO-2. However, in one study, ZO-2, ZO-3 and Occludin colocalized with actin aggregates at cell border in MDCK cells. ZO-3 is localized to sites of cell-cell interaction, identical to that of ZO-1 in tight junctions. By Immunoprecipitation analysis, ZO-3 co-immunoprecipitates with ZO-1. Using MDCK cells, ZO-3 protein colocalized with ZO-1 by Immunofluorescence. In vitro binding assays, the N-terminal of ZO-3 showed preferably binding of ZO-1 and actin filaments. Moreover, the binding of ZO-1/ZO-2/ZO-3 was also found to interact with certain Claudin proteins.
Catalog #Z0774
ApplicationsSuitable for use in Immunofluorescence, ELISA, Western Blot and Immunoprecipitation. Other applications not tested.
Recommended DilutionsImmunofluorescence: 0.5-2ug/ml
ELISA: 0.1-1ug/ml
Western Blot: 1-3ug/ml
Immunoprecipitation: 2-3ug
Optimal dilutions to be determined by the researcher.
Storage and StabilityMay be stored at 4°C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20°C. Aliquots are stable for 12 months after receipt. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.
Clone TypePolyclonal
FormSupplied as a liquid in PBS, pH 7.4, 0.1% sodium azide
PurityPurified by immunoaffinity chromatography
ImmunogenSynthetic peptide derived from the internal region of the human ZO-3 protein.
SpecificityRecognizes human ZO-3 protein with a molecular weight of ~130kD. Crossreactivity with other Zonula Occluden family members has not been observed. Reactivity is con rmed with human T84, HeLa, and canine MDCK cell lysates.
Important NoteThis product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological.

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