DEAD box protein 42 ; RNA helicase-like protein ; RHELP ; RNA helicase-related protein ; RNAHP ; SF3b DEAD box protein ; Splicing factor 3B-associated 125 kDa protein ; SF3b125
Categories
Elisa
Function
ATP-dependent RNA helicase. Binds to partially double-stranded RNAs (dsRNAs) in order to unwind RNA secondary structures. Unwinding is promoted in the presence of single-strand binding proteins. Mediates also RNA duplex formation thereby displacing the single-strand RNA binding protein. ATP and ADP modulate its activity: ATP binding and hydrolysis by DDX42 triggers RNA strand separation, whereas the ADP-bound form of the protein triggers annealing of complementary RNA strands. Involved in the survival of cells by interacting with TP53BP2 and thereby counteracting the apoptosis-stimulating activity of TP53BP2. Relocalizes TP53BP2 to the cytoplasm.
Specificity
Natural and recombinant Human ATP-dependent RNA helicase DDX42
Subcellular Location
Cytoplasm Nucleus speckle Nucleus Cajal body Isoform 2 is present in Cajal bodies (CBs) and nuclear speckles.
Component of splicing factor SF3B which is composed of at least eight subunits; SF3B1/SAP155/SF3B155, SF3B2/SAP145/SF3B155, SF3B3/SAP130/SF3B130, SF3B4/SAP49/SF3B49, SF3B14A, PHF5A/SF3B14B, SF3B10 and SF3B125. Interacts (via the C-terminus) with TP53BP2; the interaction is not inhibitied by TP53BP2 ubiquitination and is independent of p53/TP53.