Anti-BACH1.3/BACH1 Antibody Picoband® Fluoro550 Conjugated

Transcription regulator protein BACH1 is a protein that in humans is encoded by the BACH1 gene. This gene encodes a transcription factor that belongs to the cap'n'collar type of basic region leucine zipper factor family (CNC-bZip) . The encoded protein contains broad complex, tramtrack, bric-a-brac/poxvirus and zinc finger (BTB/POZ) domains, which is atypical of CNC-bZip family members. These BTB/POZ domains facilitate protein-protein interactions and formation of homo- and/or hetero-oligomers. When this encoded protein forms a heterodimer with MafK, it functions as a repressor of Maf recognition element (MARE) and transcription is repressed. Multiple alternatively spliced transcript variants have been identified for this gene.

Isoform 2 and isoform 3 function as proton-gated sodium channels; they are activated by a drop of the extracellular pH and then become rapidly desensitized. The channel generates a biphasic current with a fast inactivating and a slow sustained phase. Has high selectivity for sodium ions and can also transport lithium ions with high efficiency. Isoform 2 can also transport potassium, but with lower efficiency. It is nearly impermeable to the larger rubidium and cesium ions. Isoform 3 can also transport calcium ions. Mediates glutamate-independent Ca2+entry into neurons upon acidosis. This Ca2+overloading is toxic for cortical neurons and may be in part responsible for ischemic brain injury. Heteromeric channel assembly seems to modulate channel properties. Functions as a postsynaptic proton receptor that influences intracellular Ca2+concentration and calmodulin-dependent protein kinase II phosphorylation and thereby the density of dendritic spines. Modulates activity in the circuits underlying innate fear.

1. Blouin, J.-L., Sail, G. D., Guipponi, M., Rossier, C., Pappasavas, M.-P., Antonarakis, S. E. Isolation of the human BACH1 transcription regulator gene, which maps to chromosome 21q22.1. Hum. Genet. 102: 282-288, 1998. 2. Ebina-Shibuya, R., Watanabe-Matsui, M., Matsumoto, M., Itoh-Nakadai, A., Funayama, R., Nakayama, K., Muto, A., Igarashi, K. The double knockout of Bach1 and Bach2 in mice reveals shared compensatory mechanisms in regulating alveolar macrophage function and lung surfactant homeostasis. J. Biochem. 160: 333-344, 2016. 3. Kanezaki, R., Toki, T., Yokoyama, M., Yomogida, K., Sugiyama, K., Yamamoto, M., Igarashi, K., Ito, E. Transcription factor BACH1 is recruited to the nucleus by its novel alternative spliced isoform. J. Biol. Chem. 276: 7278-7284, 2001.