AQP3 Lysate – Tissue Lysate

This gene encodes the water channel protein aquaporin 3. Aquaporins are a family of small integral membrane proteins related to the major intrinsic protein, also known as aquaporin 0. Aquaporin 3 is localized at the basal lateral membranes of collecting duct cells in the kidney. In addition to its water channel function, aquaporin 3 has been found to facilitate the transport of nonionic small solutes such as urea and glycerol, but to a smaller degree. It has been suggested that water channels can be functionally heterogeneous and possess water and solute permeation mechanisms. Alternative splicing of this gene results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Dec 2015]

AQP3: Water channel required to promote glycerol permeability and water transport across cell membranes. Acts as a glycerol transporter in skin and plays an important role in regulating SC (stratum corneum) and epidermal glycerol content. Involved in skin hydration, wound healing, and tumorigenesis. Provides kidney medullary collecting duct with high permeability to water, thereby permitting water to move in the direction of an osmotic gradient. Slightly permeable to urea and may function as a water and urea exit mechanism in antidiuresis in collecting duct cells. It may play an important role in gastrointestinal tract water transport and in glycerol metabolism. Belongs to the MIP/aquaporin (TC 1.A.8) family. 2 isoforms of the human protein are produced by alternative splicing.

Protein type: Membrane protein, multi-pass; Transporter, aquaporin family; Membrane protein, integral; Transporter; Channel, misc.

Chromosomal Location of Human Ortholog: 9p13

Cellular Component: integral to plasma membrane; basolateral plasma membrane; cytoplasm; plasma membrane; integral to membrane; intercellular junction

Molecular Function: transporter activity; urea transmembrane transporter activity; water channel activity; glycerol channel activity

Biological Process: odontogenesis; positive regulation of immune system process; glycerol transport; cellular water homeostasis; response to retinoic acid; response to vitamin D; transport; water transport; renal water homeostasis; response to calcium ion; excretion; regulation of keratinocyte differentiation; transmembrane transport

Disease: Gil Blood Group