   3.1.13.1 | Rrp44 in complex with single-stranded RNA, to 2.3 A resolution. Structure of Rrp44 displays CSD1, CSD2, RNB, and S1 domains. The two N-terminal cold shock domains (CSD1, residues 271-399; CSD2, residues 400-475) and the C-terminal S1 domain (residues 911-998) display characteristic OB folds, with five antiparallel beta strands organized in a beta barrel structure. CSD1 is fused to an N-terminal alpha helix (residues 261-268) and the S1 domain has an insertion of three beta strands (between beta3 and beta4) as compared to a standard OB fold. The RNB domain is centered around a core and is surrounded by several alpha helices |
