title: Dual regulation of the LDL receptor--some clarity and new questions.
abstract: Upregulation of the expression of the LDL receptor (LDLR) gene does not always lead to an increase in the LDLR protein. While the mRNA expression of the LDLR and the newly studied proprotein convertase PCSK9 are coordinately upregulated in absence of sterols, the latter proteinase apparently enhances the degradation of the LDLR protein.
authors.affiliation: Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
authors.forename: Alan D
authors.initials: AD
authors.lastname: Attie
authors.forename: Nabil G
authors.initials: NG
authors.lastname: Seidah
mesh_terms: D000818:Animals; D004268:DNA-Binding Proteins / Q000378:metabolism; D005786:Gene Expression Regulation; D008099:Liver / Q000378:metabolism; D000071449:Proprotein Convertase 9; D043484:Proprotein Convertases; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D011973:Receptors, LDL / Q000235:genetics / Q000378:metabolism*; D012697:Serine Endopeptidases / Q000235:genetics / Q000378:metabolism*; D051782:Sterol Regulatory Element Binding Protein 2; D014157:Transcription Factors / Q000378:metabolism
chemical_list: D004268:DNA-Binding Proteins; D012333:RNA, Messenger; D011973:Receptors, LDL; D051782:Sterol Regulatory Element Binding Protein 2; D014157:Transcription Factors; C472126:Pcsk9 protein, mouse; D000071449:Proprotein Convertase 9; D043484:Proprotein Convertases; D012697:Serine Endopeptidases