GSM7746898: L08_Symbiodinium_minutum_SSb01_omniATAC; Breviolum minutum; ATAC-seq
ATAC-seq experiments were performed following the omniATAC protocol. Briefly, ∼100K B. minutum cells were centrifuged at 1,000 g, then resuspended in 500 µL 1× PBS and centrifuged again. Cells were then resuspended in 50 µL ATAC-RSB-Lysis buffer (10 mM Tris-HCl pH 7.4, 10 mM NaCl, 3 mM MgCl2, 0.1% IGEPAL CA-630, 0.1% Tween-20, 0.01% Digitonin) and incubated on ice for 3 minutes. Subsequently 1 mL ATAC-RSB-Wash buffer (10 mM Tris-HCl pH 7.4, 10 mM NaCl, 3 mM MgCl2, 0.1% Tween-20, 0.01% Digitonin) were added, the tubes were inverted several times, and nuclei were centrifuged at 500 g for 5 min at 4◦C. Transposition was carried out by resuspending nuclei in a mix of 25 µL 2× TD buffer (20 mM Tris-HCl pH 7.6, 10 mM MgCl2, 20% Dimethyl Formamide), 2.5 µL transposase (custom produced) and 22.5 µL nuclease-free H2O, and incubating at 37◦C for 30 min in a Thermomixer at 1000 RPM. Transposed DNA was isolated using the MinElute PCR Purification Kit (Qiagen Cat# 28004/28006), and PCR amplified for 10 cycles using the usual ATAC-seq settings. Libraries were purified using the MinElute kit, then sequenced on a Illumina NextSeq 550 instrument as 2x36mers.