- Peptide (C)KLEESLREQAEKEGSALSVR, corresponding to residues 356-375 of rat Kir4.1 (Accession P49655). Intracellular, C-terminus.
- Expression of Kir4.1 in rat cerebellumImmunohistochemical staining of frozen sections of rat cerebellum using Anti-Kir4.1 (KCNJ10)-ATTO Fluor-488 Antibody (#APC-035-AG) (green), (1:50). Staining is specific for Bergmann glial cells prolongations (white arrows) in the molecular layer (ML) and astrocytes (yellow arrows) in the granular layer (GL). Purkinje cell bodies are stained with fluorescent Nissl stain (red). Hoechst 33342 (blue) is used as counterstain.
- Mouse brain sections (1:400) (Steiner, E. et al. (2012) Glia 60, 1646.).
Kir4.1 is a member of the inward rectifying K+ channel family. The family includes 15 members that are structurally and functionally different from the voltage-dependent K+ channels.
The family’s topology consists of two transmembrane domains that flank a single and highly conserved pore region with intracellular N- and C-termini. As is the case for the voltage-dependent K+ channels the functional unit for the Kir channels is composed of four subunit that can assembly as either homo or heteromers.
Kir channels are characterized by a K+ efflux that is limited by depolarizing membrane potentials thus making them essential for controlling resting membrane potential and K+ homeostasis.
The Kir4 subfamily has been classified as weak rectifiers with intermediate conductance.
Kir4.1, encoded by KCNJ10, is mainly expressed in brain, specifically in glia cells, but also in retina, ear and kidney.1,2
It has been proposed that Kir4.1 has an essential role in glial K+ buffering, a process that re-uptakes the K+ released during neuronal activity into the intracellular interstitial space. Loss of Kir4.1 causes retinal defects and loss of endochoclear potential.3
Species reactivity key:
Anti-Kir4.1 (KCNJ10) Antibody (#APC-035) is a highly specific antibody directed against an epitope of the rat protein. The antibody can be used in western blot, immunoprecipitation, immunohistochemistry, and immunocytochemistry applications. It has been designed to recognize Kir4.1 potassium channel from rat, mouse, and human samples.
Anti-Kir4.1 (KCNJ10)-ATTO Fluor-488 Antibody (#APC-035-AG) is directly labeled with an ATTO-488 fluorescent dye. ATTO dyes are characterized by strong absorption (high extinction coefficient), high fluorescence quantum yield, and high photo-stability. The ATTO-488 label is analogous to the well known dye fluorescein isothiocyanate (FITC) and can be used with filters typically used to detect FITC. Anti-Kir4.1 (KCNJ10)-ATTO Fluor-488 Antibody is specially suited to experiments requiring simultaneous labeling of different markers.
- Immunohistochemical staining of mouse brain sections with #APC-035. Tested in Kir4.1-/- mice.
Brasko, C. et al. (2017) Brain Struct. Funct. 222, 41.
- Immunohistochemical staining of mouse oligodendrocyte sections with #APC-035. Tested on Kir4.1-/- cells.
Battefeld, A. et al. (2016) Nat. Commun. 7, 11298.
- Immunohistochemical staining of mouse cerebellum sections with #APC-035. Tested in Kir4.1 conditional knockout cerebellum.
Djukic, B. et al. (2007) J. Neurosci. 27, 11354.
- Mouse brain sections (1:200).
Steiner, E. et al. (2012) Glia 60, 1646.