Rabbit anti VISA antibody recognizes the human Mitochondrial antiviral-signaling protein (MAVS), also known as Virus-induced-signalling-adaptor (VISA), and KIAA1271, VISA is a 540 amino acid outer mitochondrial membrane protein containing a single CARD domain. VISA is an important protein required for innate immune defence against viruses (Huang et al. 2014).
VISA acts downstream of DDX58 and IFIH1/MDA5, which detect intracellular dsRNA produced during viral replication, to coordinate pathways leading to the activation of NF-kappa-B, IRF3 and IRF7, and to the subsequent induction of antiviral cytokines such as IFN-beta and RANTES (CCL5). VISA is believed to activate the same pathways following detection of extracellular dsRNA by TLR3 and it has been hypothosized that VISA is involved in the regulation of apoptosis following viral infection (Lei et al. 2009).
VISA is a ubiquitously expressed protein present in a range of cell types including T-cells, monocytes and epithelial cells, with highest levels in tissues of the heart, skeletal muscle, liver, placenta and in peripheral blood leukocytes. Multiple isoforms of VISA generated by alternative splicing have been identified. Rabbit anti VISA antibody is reactive with full length VISA isoform 1. It does not react with isoforms 2,3,5 or 6, reactivity with isoform 4 is unknown.
N.B. Antibody reactivity and working conditions may vary between species.
Purified IgG - liquid
Antisera to human VISA were raised by repeated immunisation of rabbits with highly purified antigen. Purified IgG prepared from whole serum by affinity chromatography.
0.02% Sodium Azide (NaN3)
A peptide corresponding to a 17 amino acid sequence from near the centre of Human VISA.
Approx. Protein Concentrations
IgG concentration 1.0mg/ml
Reagents In The Kit
Preparing The Antibody
Phosphate buffered saline
Store at +4oC or at -20oC if preferred. Storage in frost-free freezers is not recommended. This product should be stored undiluted. Avoid repeated freezing and thawing as this may denature the antibody. Should this product contain a precipitate we recommend microcentrifugation before use.
This product has been reported to work in the following applications. This information is derived from testing within our laboratories, peer-reviewed publications or personal communications from the originators. Please refer to references indicated for further information. For general protocol recommendations, please visit the antibody protocols page.
Immunohistology - Paraffin(1)
This product requires antigen retrieval using heat treatment prior to staining of paraffin sections.Sodium citrate buffer pH 6.0 is recommended for this purpose.
Where this product has not been tested for use in a particular technique this does not necessarily exclude its use in such procedures. Suggested working dilutions are given as a guide only. It is recommended that the user titrates the product for use in their own system using appropriate negative/positive controls.
Histology Positive Control Tissue
AHP1702 detects a band of approximately 56kDa in Rat brain tissue lysate.