Differential changes of nuclear-envelope-associated enzyme activities involved in nucleocytoplasmic mRNA transport in the developing rat brain and liver.
Nucleocytoplasmic transport of rat liver mRNA is thought to be regulated by a nucleoside triphosphatase whose activity in the intact nuclear envelope is stimulated by the 3'poly(A) tail of poly(A)+ mRNA. In contrast to the liver mRNA, the mRNA from rat brain contains a great population of poly(A)- mRNA's that does not appear until after birth. Measurements of the nuclear-envelope-associated enzyme activities involved in mRNA transport, and their dependence on endogenous (isolated cytoplasmic mRNA-transport-stimulating proteins) and exogenous (poly(A), lectins, and neoglycoproteins) factors during prenatal and postnatal rat brain and liver development, revealed marked organ-dependent differences paralleling the appearance of the poly(A)- mRNA unique in the brain.
D000818:Animals; D001692:Biological Transport; D001921:Brain / Q000254:growth & development / Q000378:metabolism*; D002352:Carrier Proteins / Q000378:metabolism; D002467:Cell Nucleus / Q000378:metabolism; D003593:Cytoplasm / Q000378:metabolism; D004789:Enzyme Activation / Q000187:drug effects; D006023:Glycoproteins / Q000494:pharmacology; D037102:Lectins / Q000494:pharmacology; D008099:Liver / Q000254:growth & development / Q000378:metabolism*; D009685:Nuclear Envelope / Q000201:enzymology; D029543:Nucleocytoplasmic Transport Proteins; D043583:Nucleoside-Triphosphatase; D010744:Phosphoric Monoester Hydrolases / Q000378:metabolism; D011061:Poly A / Q000378:metabolism* / Q000494:pharmacology; D012333:RNA, Messenger / Q000378:metabolism*; D016601:RNA-Binding Proteins; D051381:Rats; D011919:Rats, Inbred Strains
D002352:Carrier Proteins; D006023:Glycoproteins; D037102:Lectins; D029543:Nucleocytoplasmic Transport Proteins; D012333:RNA, Messenger; D016601:RNA-Binding Proteins; D011061:Poly A; D010744:Phosphoric Monoester Hydrolases; D043583:Nucleoside-Triphosphatase