Abcam, ab31721, Anti-Occludin antibody

Size: 100µg
Rabbit Polyclonal Occludin antibody. Suitable for WB and reacts with Recombinant fragment - Human, Human samples. Cited in 209 publications.
Key facts
Host species:Rabbit,
Clonality:Polyclonal,
Isotype:IgG,
Carrier free:No,
Reacts with:Human,
Applications:WBSee reactivity dataSee the reactivity data table below for information on validated species and application combinations.,
Immunogen:The exact immunogen used to generate this antibody is proprietary information.,
Specificity:New batches of this antibody are no longer guaranteed in ICC/IF, IHC-P or IHC-Fr as they have not passed our stringent batch testing criteria. Please contact customer support for any specific queries. We recommend ab216327 as an alternative for ICC/IF and IHC-P. The immunogen used to raise this antibody has 78% homology with the Mouse Occludin protein and the Rat Occludin protein. Some customers have successfully used ab31721 with Mouse/Rat lysates/tissue, however we have not been successful detecting Occludin in these species in our own testing.

Properties and Storage Information:
Form-Liquid, Purification technique-Affinity purification Immunogen, Storage buffer-pH: 7.4Preservative: 0.02% Sodium azideConstituents: PBS, 1% BSA, Shipped at conditions-Blue Ice, Appropriate short-term storage duration-1-2 weeks, Appropriate short-term storage conditions-+4°C, Appropriate long-term storage conditions--20°C, Aliquoting information-Upon delivery aliquot, Storage information-Avoid freeze / thaw cycle

Supplementary Information:
This supplementary information is collated from multiple sources and compiled automatically.
Occludin is a protein that plays an important mechanical role in forming tight junctions which are specialized connections between neighboring cell membranes. Alternative names for this target include occludin-1. The occludin protein has a molecular weight of approximately 65 kDa. It is expressed in a variety of tissues but levels tend to be high in epithelial and endothelial cells where tight junctions are essential for barrier functions. Occludin acts as integral membrane protein contributing to the complex structures that seal spaces between cells.
Biological function summary
Occludin serves as an important component in maintaining cell-to-cell adhesion within tight junction complexes. It interacts with other tight junction proteins such as claudins and junctional adhesion molecules to regulate paracellular permeability. These interactions help maintain selective barrier properties of epithelial and endothelial layers preventing the passage of large molecules and pathogens while allowing passage of ions and small molecules. Occludin stabilizes the tight junctions by interacting with the cytoskeleton and signaling proteins that are important for tight junction assembly and maintenance.
Pathways
Occludin functions prominently in the regulation of tight junction integrity and barrier function. It participates in pathways such as the tight junction signaling pathway and the paracellular transport pathway. Occludin interacts with ZO-1 a scaffolding protein bridging its interaction with the actin cytoskeleton which supports the structural organization and function of tight junctions. This connectivity allows for regulation of the permeability and transport across the epithelial barrier.
Disruptions in occludin function are connected to conditions such as inflammatory bowel disease (IBD) and some cancers. In IBD abnormal occludin expression can compromise intestinal barrier function leading to increased intestinal permeability and an inflammatory response. In certain cancers loss of occludin expression is linked to increased invasiveness and metastasis due to weakened cell adhesion. The dysfunction of proteins like ZO-1 which interact with occludin in these pathways also contributes to these pathological states highlighting the importance of occludin's regulatory roles in maintaining cellular barrier integrity.