Unconventional prefoldin protein involved in translation initiation%3B required for correct assembly of RNAP I%2C II%2C and III in an Rpb5p-dependent manner%3B shuttles between nucleus and cytoplasm%3B mutants have inappropriate expression of nutrient sensitive genes due to translational derepression of Gcn4p transcription factor%3B diploid mutants show random budding%3B ortholog of human URI/RMP