This domain has an OB fold and is found in the Dis3l2 protein [1]. This domain along with CSD1 binds to RNA.

1: Mechanism of Dis3l2 substrate recognition in the Lin28-let-7 pathway. Faehnle CR, Walleshauser J, Joshua-Tor L; Nature. 2014;514:252-256. PMID:25119025

2: Structure of the active subunit of the yeast exosome core, Rrp44: diverse modes of substrate recruitment in the RNase II nuclease family. Lorentzen E, Basquin J, Tomecki R, Dziembowski A, Conti E; Mol Cell. 2008;29:717-728. PMID:18374646

3: The yeast exosome functions as a macromolecular cage to channel RNA substrates for degradation. Bonneau F, Basquin J, Ebert J, Lorentzen E, Conti E; Cell. 2009;139:547-559. PMID:19879841

4: Crystal structure of an RNA-bound 11-subunit eukaryotic exosome complex. Makino DL, Baumgartner M, Conti E; Nature. 2013;495:70-75. PMID:23376952