iDeal CUT&Tag kit for Histones

The iDeal CUT&Tag protocol involves the binding of cells on a solid phase ConA magnetic beads, allowing magnetic handling of the cells for the major steps of the protocol. Bead-bound cells are permeabilized, incubated with primary antibody against a target of interest and secondary antibody. Then, Diagenode’s protein pA-Tn5 Transposase - loaded is bound to the complex. Protein A guides Tn5 transposase on chromatin to the antibody attached to its target. Tn5 transposase is activated by Mg+2 ions to insert the sequencing adaptors into genomic regions of interest. DNA is then purified and the tagmented genomic regions of interest are amplified by PCR using Diagenode’s Primer Indexes for tagmented libraries.

Successful CUT&Tag results showing a low background with high region-specific enrichment are presented below. Chromatin profiling has been performed on 50,000 K562 cells, using the Diagenode’s iDeal CUT&Tag kit for Histones (Cat. No. C01070020), the Antibody Package for CUT&Tag anti rabbit (Cat. No. C01070022), the 24 UDI for Tagmented Libraries (Cat.No. C01011034) and H3K4me3 (Cat. No. C15410003), H3K27me3 (Cat. No. C15410069) or H3H9me3 antibodies (Cat. No., C15410193) as indicated. The libraries were sequenced on Illumina’s NovaSeq6000 in 2x50 bp mode.

Figure 1. Typical library profiles (Agilent Fragment traces) generated by the iDeal CUT&Tag protocol using 50,000 K562 cells and H3K27me3 (top), H3K4me4 (middle) primary antibodies and IgG control (bottom). Sharp peak at around 40 bp is an excess of free oligonucleotide used for pA-Tn5 loading.

Figure 3. Sequencing profiles of the CUT&Tag libraries. Integrative genomics viewer (IGV) visualization of CUT&Tag experiments using 50,000 of K562 cells and H3K4me3 (blue), H3K27me3 (red) or H3K9me3 (green).

Figure 4. Sequencing profiles of the CUT&Tag libraries. Integrative genomics viewer (IGV) visualization of CUT&Tag experiments using 50,000 (blue) or 10,000 (red)) of K562 cells and H3K27me3 antibody.