Voltage-gated chloride channel (PubMed:10567397, PubMed:11078724, PubMed:11231150, PubMed:12163466, PubMed:15684092). Insensitive to depolarizing conditioning voltages, requires low voltages for activation, insensitive to chloride levels and has a mild sensitivity to low pH. Channel gating properties are conferred by the cytoplasmic C-terminus (PubMed:14565992, PubMed:16500974). Plays a role in egg laying by modulating hermaphrodite-specific neurons (HSN) excitability and the ovulatory contractions of gap-junction-coupled gonadal sheath cells (PubMed:11231150, PubMed:24431435). When active, may prevent tubular formation of the excretory canals (PubMed:18049475). Activated during oocyte meiotic maturation and by membrane hyperpolarization and cell swelling (PubMed:11231150, PubMed:14565992). Inhibited by Zn(2+) and to a lesser extent by Cd(2+)(PubMed:11231150). Voltage-gated chloride channel (PubMed:10567397, PubMed:11078724, PubMed:11231150). Sensitive to depolarizing conditioning voltages, requires stronger voltages for activation and activation is slower, is inhibited by low concentrations of chloride and is activated by low pH. Channel gating properties are conferred by the cytoplasmic C-terminus (PubMed:14565992, PubMed:16500974). Isoform a interacts (via RFLI motif) with gck-3 (via C-terminus). Expressed in excretory cell, 4 anterior epithelial cells of the intestine, hermaphrodite-specific neurons and enteric muscles (PubMed:11078724, PubMed:10567397). Expressed also in vulva and uterus (PubMed:10567397). Isoform a is expressed in oocytes (at protein level) (PubMed:11231150). The CBS domains, the R-helix linker (543-562) and the C-terminal domain (833-1001) regulate channel sensitivity to voltage, pH and extracellular chloride concentrations, probably by altering the outer pore structure (PubMed:16500974, PubMed:20581474). The region (738-751) between the CBS domains is essential for channel activation (PubMed:23083714). Phosphorylated by gck-3; phosphorylation at both Ser-742 and Ser-747 is required to inhibit channel activity (PubMed:19088383). Dephosphorylated by gsp-1/2 during cell swelling and oocyte meiotic maturation, which results in channel activation (PubMed:12163466). RNAi-mediated knockdown in oocytes results in inhibition of hyperpolarization-induced or swelling-induced current and in premature ovulatory contractions of gonadal sheath cells. Normal adaptive response to hypotonic swelling. Belongs to the chloride channel (TC 2.A.49) family.