This entry represents the C-terminal alpha-helical domain of Integrator complex subunit 14 (IntS14) [1], a component of the integrator complex which is involved in the transcription of small nuclear RNAs (snRNA) and their 3'-box dependent processing. This complex is also involved in the 3'-end processing of the U7 snRNA, and the spliceosomal snRNAs U1 and U5 [2]. IntS14 interacts with IntS13; both of them consist of an N-terminal VWA domain followed by a central beta-barrel domain and a C-terminal alpha-helical domain, which are connected through a linker devoid of secondary structure elements. This domain contribute to binding by packing against the beta-barrel of IntS13 [1].

1: INTS10-INTS13-INTS14 form a functional module of Integrator that binds nucleic acids and the cleavage module. Sabath K, Staubli ML, Marti S, Leitner A, Moes M, Jonas S; Nat Commun. 2020;11:3422. PMID:32647223

2: An RNAi screen identifies additional members of the Drosophila Integrator complex and a requirement for cyclin C/Cdk8 in snRNA 3'-end formation. Chen J, Ezzeddine N, Waltenspiel B, Albrecht TR, Warren WD, Marzluff WF, Wagner EJ; RNA. 2012;18:2148-2156. PMID:23097424