Fold: The "swivelling" beta/beta/alpha domain [52008]
3 layers: b/b/a; the central sheet is parallel, and the other one is antiparallel; there are some variations in topology this domain is thought to be mobile in most multi-domain proteins known to contain it
AF0055-like [141979] (1) PF01989; DUF126; probable link between the LeuD-like and Phosphohistidine domain superfamilies (sequence similarity crosshits)