This domain is found in plant RCD1, SRO and TAF4 proteins, hence its name of RST. It is required for interaction with multiple plant transcription factors. Radical-Induced Cell Death1 (RCD1) is an important regulator of stress and hormonal and developmental responses in Arabidopsis thaliana, as is its closest homologue, SRO1 - Similar To RCD-One1. TBP-Associated Factor 4 (TAF4) and TAF4-b are components of the transcription initiation factor complex TFIID.

1: CEO1, a new protein from Arabidopsis thaliana, protects yeast against oxidative damage. Belles-Boix E, Babiychuk E, Van Montagu M, Inze D, Kushnir S; FEBS Lett. 2000;482:19-24. PMID:11018516

2: Arabidopsis RADICAL-INDUCED CELL DEATH1 belongs to the WWE protein-protein interaction domain protein family and modulates abscisic acid, ethylene, and methyl jasmonate responses. Ahlfors R, Lang S, Overmyer K, Jaspers P, Brosche M, Tauriainen A, Kollist H, Tuominen H, Belles-Boix E, Piippo M, Inze D, Palva ET, Kangasjarvi J; Plant Cell. 2004;16:1925-1937. PMID:15208394

3: TAF4 takes flight. Marr MT 2nd; Proc Natl Acad Sci U S A. 2009;106:1295-1296 PMID:19174510

4: Unequally redundant RCD1 and SRO1 mediate stress and developmental responses and interact with transcription factors. Jaspers P, Blomster T, Brosche M, Salojarvi J, Ahlfors R, Vainonen JP, Reddy RA, Immink R, Angenent G, Turck F, Overmyer K, Kangasjarvi J; Plant J. 2009;60:268-279. PMID:19548978

5: The RST and PARP-like domain containing SRO protein family: analysis of protein structure, function and conservation in land plants. Jaspers P, Overmyer K, Wrzaczek M, Vainonen JP, Blomster T, Salojarvi J, Reddy RA, Kangasjarvi J; BMC Genomics. 2010;11:170. PMID:20226034