The initial step of transcription, consisting of the assembly of the RNA polymerase preinitiation complex (PIC) at a gene promoter, as well as the formation of the first few bonds of the RNA transcript. Transcription initiation includes abortive initiation events, which occur when the first few nucleotides are repeatedly synthesized and then released, and ends when promoter clearance takes place.
DNA-templated transcription termination +
DNA-templated transcriptional start site selection +
lncRNA transcription +
maintenance of transcriptional fidelity during transcription elongation +
miRNA transcription +
mitochondrial transcription +
mRNA transcription +
negative regulation of DNA-templated transcription +
negative regulation of RNA biosynthetic process +
piRNA transcription +
plastid transcription +
positive regulation of DNA-templated transcription +
positive regulation of RNA biosynthetic process +
promoter clearance during DNA-templated transcription +