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Osmotic swelling activates a novel anionic current with VRAC-like properties in a cytoplasmic droplet membrane from Phycomyces blakesleeanus sporangiophores
We describe here whole-cell currents of droplets prepared from the apical region of growing Phycomyces blakesleeanus sporangiophores. Whole-cell current recordings revealed the osmotically activated, outwardly rectifying, fast inactivating instantaneous current (ORIC) with biophysical properties closely resembling volume-regulated anionic current (VRAC). ORIC is activated under conditions of osmotically induced swelling and shows strong selectivity for anions over cations. In addition, ORIC shows voltage and time-dependent inactivation at positive potentials and recovery from inactivation at negative potentials. ORIC is blocked by anthracene-9-carboxylic acid, an anion channel blocker, in a voltage-dependent manner. This is the first report of the presence of VRAC-like current in an organism outside the chordate lineage.
TY - JOUR
AU - Krizak, Strahinja
AU - Nikolić, Ljiljana
AU - Stanić, Marina
AU - Žižić, Milan
AU - Zakrzewska, Joanna
AU - Zivić, Miroslav
AU - Todorović, Nataša
PY - 2015
UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/869
AB - We describe here whole-cell currents of droplets prepared from the apical region of growing Phycomyces blakesleeanus sporangiophores. Whole-cell current recordings revealed the osmotically activated, outwardly rectifying, fast inactivating instantaneous current (ORIC) with biophysical properties closely resembling volume-regulated anionic current (VRAC). ORIC is activated under conditions of osmotically induced swelling and shows strong selectivity for anions over cations. In addition, ORIC shows voltage and time-dependent inactivation at positive potentials and recovery from inactivation at negative potentials. ORIC is blocked by anthracene-9-carboxylic acid, an anion channel blocker, in a voltage-dependent manner. This is the first report of the presence of VRAC-like current in an organism outside the chordate lineage.
PB - Elsevier, Amsterdam
T2 - Research in Microbiology
T1 - Osmotic swelling activates a novel anionic current with VRAC-like properties in a cytoplasmic droplet membrane from Phycomyces blakesleeanus sporangiophores
EP - 173
IS - 3
SP - 162
VL - 166
DO - 10.1016/j.resmic.2015.02.004
ER -
@article{
author = "Krizak, Strahinja and Nikolić, Ljiljana and Stanić, Marina and Žižić, Milan and Zakrzewska, Joanna and Zivić, Miroslav and Todorović, Nataša",
year = "2015",
abstract = "We describe here whole-cell currents of droplets prepared from the apical region of growing Phycomyces blakesleeanus sporangiophores. Whole-cell current recordings revealed the osmotically activated, outwardly rectifying, fast inactivating instantaneous current (ORIC) with biophysical properties closely resembling volume-regulated anionic current (VRAC). ORIC is activated under conditions of osmotically induced swelling and shows strong selectivity for anions over cations. In addition, ORIC shows voltage and time-dependent inactivation at positive potentials and recovery from inactivation at negative potentials. ORIC is blocked by anthracene-9-carboxylic acid, an anion channel blocker, in a voltage-dependent manner. This is the first report of the presence of VRAC-like current in an organism outside the chordate lineage.",
publisher = "Elsevier, Amsterdam",
journal = "Research in Microbiology",
title = "Osmotic swelling activates a novel anionic current with VRAC-like properties in a cytoplasmic droplet membrane from Phycomyces blakesleeanus sporangiophores",
pages = "173-162",
number = "3",
volume = "166",
doi = "10.1016/j.resmic.2015.02.004"
}
Krizak, S., Nikolić, L., Stanić, M., Žižić, M., Zakrzewska, J., Zivić, M.,& Todorović, N.. (2015). Osmotic swelling activates a novel anionic current with VRAC-like properties in a cytoplasmic droplet membrane from Phycomyces blakesleeanus sporangiophores. in Research in Microbiology
Elsevier, Amsterdam., 166(3), 162-173.
https://doi.org/10.1016/j.resmic.2015.02.004
Krizak S, Nikolić L, Stanić M, Žižić M, Zakrzewska J, Zivić M, Todorović N. Osmotic swelling activates a novel anionic current with VRAC-like properties in a cytoplasmic droplet membrane from Phycomyces blakesleeanus sporangiophores. in Research in Microbiology. 2015;166(3):162-173.
doi:10.1016/j.resmic.2015.02.004 .
Krizak, Strahinja, Nikolić, Ljiljana, Stanić, Marina, Žižić, Milan, Zakrzewska, Joanna, Zivić, Miroslav, Todorović, Nataša, "Osmotic swelling activates a novel anionic current with VRAC-like properties in a cytoplasmic droplet membrane from Phycomyces blakesleeanus sporangiophores" in Research in Microbiology, 166, no. 3 (2015):162-173,
https://doi.org/10.1016/j.resmic.2015.02.004 . .
