TABLE 1.

Assembly factors.

Assembly factor		Eukaryotic RNA pol	References
S. cerevisiae	Human
R2TP complex	R2TP/prefoldin-like complex	RNA pol II. Also suggested for RNA pol I and III	Boulon et al., 2010
Hsp90	HSP90	RNA pol II. Also suggested for RNA pol I and III	Boulon et al., 2010
Npa3	GPN1/RPAP4/XAB1/MBDin	RNA pol II	Forget et al., 2010; Staresincic et al., 2011; Niesser et al., 2015
Gpn2	GPN2	RNA pol II and III	Staresincic et al., 2011; Minaker et al., 2013; Zeng et al., 2018
Gpn3	GPN3/Parcs	RNA pol II and III	Calera et al., 2011; Minaker et al., 2013; Liu et al., 2020
Rba50	RPAP1	RNA pol II	Jeronimo et al., 2004; Zeng et al., 2018; Liu et al., 2020
Rtr1	RPAP2	RNA pol II	Forget et al., 2013; Gómez-Navarro and Estruch, 2015
Bud27	URI	RNA pol I, II, III	Mirón-García et al., 2013; Vernekar and Bhargava, 2015
Rtp1		RNA pol II	Gómez-Navarro et al., 2013
Rbs1		RNA pol III	Cieśla et al., 2015
Iwr1		RNA pol II	Czeko et al., 2011