Pararetro- and retrovirus RNA: splicing and the control of nuclear export

Splicing and nuclear export of RNA are obligatory steps in gene expression by eukaryotic cells. Not only have novel splicing events been identified during the replication cycle of retro- and pararetroviruses, but the resulting combination of spliced and unspliced products requires specialized mechanisms for nuclear export, which in turn is a key regulatory step for virus replication.