This is a family of yeast proteins. A14 is one of the final two subunits of Saccharomyces cerevisiae RNA polymerase I and is proposed to play a role in the recruitment of pol I to the promoter [1]. Members of this entry has a HRDC domain, which is equivalent to that in subunit F from archaeal RNA polymerase II and RPB4 from the eukaryotic RNA polymerase II [2].

1: The fission yeast protein, Ker1p, is an ortholog of RNA polymerase I subunit A14 in saccharomyces cerevisiae, and is required for stable association of Rrn3p and RPA21 in Pol I. Imazawa Y, Hisatake K, Mitsuzawa H, Matsumoto M, Tsukui T, Nakagawa K, Nakadai T, Shimada M, Ishihama A, Nogi Y; J Biol Chem 2005; [Epub ahead of print] PMID:15647272

2: Structural and functional homology between the RNAP(I) subunits A14/A43 and the archaeal RNAP subunits E/F. Meka H, Daoust G, Bourke Arnvig K, Werner F, Brick P, Onesti S; Nucleic Acids Res 2003; Aug 1;31(15):4391-400. doi: 10.1093/nar/gkg652. PMID:12888498