RNA polymerase I preinitiation complex assembly
The formation of a large multiprotein-DNA complex that self-assembles on gene promoter through the sequential recruitment of the general initiation factors that compose the preinitiation complex (PIC) (which includes including UBF, SL1, RRN3 and TBP in human). The PIC engages RNA polymerase I on its DNA template strand and sparks polymerization of the first few RNA nucleotides.
GO:0070897
transcription preinitiation complex assembly
is_a
GO:0006361
transcription initiation at RNA polymerase I promoter
part_of
RNA polymerase I transcriptional preinitiation complex assembly
exact
RNA polymerase I transcriptional preinitiation complex assembly at the promoter for the nuclear large rRNA transcript
narrow
RNA polymerase I transcriptional preinitiation complex assembly at the promoter for the nucleolar primary rRNA transcript
narrow
SPAC2F3.03c SPBC725.17c SPBC336.09c