Dear Jack, In this recent review paper (http://www.biomedcentral.com/1472-6807/13/6), I read about non-catalytic Rossmannn fold proteins which include mitochondrial transcription factor B (sc-mtTFB) (http://www.ncbi.nlm.nih.gov/pubmed/12897151) and a t-RNA (1-methyladenosine) MTase from Saccharomyces cerevisiae (http://www.ncbi.nlm.nih.gov/pubmed/11684083).
Best wishes, Avinash Punekar Uppsala University
