part of RNA polymerase I preinitiation complex assembly https://github.com/geneontology/go-ontology/issues/25954 biological_process 2011-08-24T04:16:28Z GO:0001188 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. krc RNA polymerase I transcriptional preinitiation complex assembly at the promoter for the nuclear large rRNA transcript RNA polymerase I transcriptional preinitiation complex assembly RNA polymerase I transcriptional preinitiation complex assembly at the promoter for the nucleolar primary rRNA transcript GO:0001189 transcription initiation at RNA polymerase I promoter transcription preinitiation complex assembly