Anti-Aquaporin 5/AQP5 Antibody Picoband®

Aquaporin 5, also known as AQP5, is a water channel protein. The aquaporins (AQPs) are a family of more than 10 homologous water transporting proteins expressed in many mammalian epithelia and endothelia. At least five AQPs are expressed in the eye: AQP0 (MIP) in lens fiber, AQP1 in cornea endothelium, ciliary and lens epithelia and trabecular meshwork, AQP3 in conjunctiva, AQP4 in ciliary epithelium and retinal Müller cells, and AQP5 in corneal and lacrimal gland epithelia. Among the seven human aquaporins cloned to date (AQPs 0-6), genes encoding the four most closely related aquaporins (AQP0, AQP2, AQP5, and AQP6) have been mapped to chromosome band 12q13, suggesting an aquaporin family gene cluster at this locus. Aquaporin 5 plays a role in the generation of saliva, tears and pulmonary secretions.

A synthetic peptide corresponding to a sequence at the C-terminus of human Aquaporin 5, which shares 71.7% and 73% amino acid (aa) sequence identity with mouse and rat Aquaporin 5, respectively.

Forms a water-specific channel. Implicated in the generation of saliva, tears, and pulmonary secretions. Required for TRPV4 activation by hypotonicity (PubMed:16571723) . Together with TRPV4, controls regulatory volume decrease in salivary epithelial cells (PubMed:16571723) .

1. Verkman AS (2003) . Role of aquaporin water channels in eye function.. Exp. Eye Res. 76 (2) : 137–43. 2. Ma T, Yang B, Umenishi F, Verkman AS (1997) . Closely spaced tandem arrangement of AQP2, AQP5, and AQP6 genes in a 27-kilobase segment at chromosome locus 12q13.. Genomics 43 (3) : 387–9.

Store at -20°C for one year from date of receipt. After reconstitution, at 4°C for one month. It can also be aliquotted and stored frozen at -20°C for six months. Avoid repeated freeze-thaw cycles.