Table 7.

Factors involved in nucleoplasmic steps of pre‐40S maturation.

Yeast	40S	60S	Human	40S	60S	Function in nucleoplasmic steps of pre‐40S maturation	Citation
Tsr1	x		TSR1	x		Associates	Gelperin et al (2001)
Nob1	x		NOB1	x		Endoribonuclease, associates with ITS1, catalyzes removal of final part of ITS1 (site D/3), might associate earlier	Fatica et al (2004), Zemp et al (2009) and Ameismeier et al (2018)
Hrr25	x		CKI‐δ/CSNK1D	x		Associates	Schäfer et al (2006) and Zemp et al (2014)
Hrr25	x		CKI‐ε/CSNK1E	x		Associates	Schäfer et al (2006) and Zemp et al (2014)
Rio1	x		RIOK1/RIO1	x		Associates	Rouquette et al (2005) and Widmann et al (2012)
Rio2	x		RIOK2/RIO2	x		Associates	Vanrobays et al (2003) and Zemp et al (2009)
Ltv1	x		LTV1	x		Associates	Seiser et al (2006) and Zemp et al (2014)
			PARN	x		Processes 3′ end of the 18S pre‐rRNA	Montellese et al (2017)
Slx9			FAM207A/C21orf70	x			Wyler et al (2011)