GSM1436279
GSM1436279: ACSH_Trans_CIYT; Escherichia coli; RNA-Seq
RNA was obtained from cells pellets by lysozyme treatment and phenol-chloroform extraction, analyzed by agarose gel electrophoresis to confirm integrity, quantified using a Nanodrop spectrophotometer (Thermo Scientific), and stored at -80°C Total RNA (2ug) was subjected to rRNA depletion using Ribozero rRNA removal kit – Bacteria (Epicenter, illumina). rRNA-depleted RNA was purified using Ampure XP beads. Purified RNA was then fragmented using RNA Fragmentation Reagents (Ambion) at 70C for 2mins, targeting fragments ranging from 200-300bp. Fragmented RNA was then purified using Ampure XP beads (Agencourt). Reverse transcription was performed using SuperScript II Reverse Transcription (Invitrogen) with an initial annealing of random hexamers (Fermentas) at 65C for 5mins, follow by an incubation of 42C for 50mins and an inactivation step at 70C for 10mins. cDNA was then purified with Ampure XP beads. This was followed by second strand synthesis using dNTP mix where dTTP is replaced by dUTP. Reaction was performed at 16C for 1h. Double stranded cDNA fragments were purified and selected for targeted fragments (200-300bp) using Ampure XP beads. The dscDNA were then blunt-ended, the 3' ends were adenylated with a single A, and ligated with library adapters using Kapa Library Amplification Kit (Kapa Biosystems). Adapter-ligated DNA was purified using Ampure XP beads. Digestion of dUTP was then performed using AmpErase UNG (Applied Biosystems) to remove second strand cDNA. Digested cDNA was again cleaned up with Ampure SPRI beads. This was followed by amplification by 10 cycles of PCR using Kapa Library Amplification Kit (Kapa Biosystems). The final library was cleaned up with Ampure SPRI beads. Sequencing was done on the Illumina HiSeq platform generating paired end reads of 100bp each. Note: Target fragments here refers to the insert only, that is the cDNA.  The actual size we use in selection will be larger, typically the target fragment size + 125bp adaptors (~300-450bp).
GEO
GSM1436279
GEO Accession
GSM1436279