The lamin-tail domain (LTD), which has an immunoglobulin (Ig) fold, is found in Nuclear Lamins, Chlo1887 from Chloroflexus, and several bacterial proteins where it occurs with membrane associated hydrolases of the metallo-beta-lactamase,synaptojanin, and calcineurin-like phosphoesterase superfamilies [1].

1: Comparative genomics, evolution and origins of the nuclear envelope and nuclear pore complex. Mans BJ, Anantharaman V, Aravind L, Koonin EV; Cell Cycle. 2004;3:1612-1637. PMID:15611647