title: The mouse APLP2 gene. Chromosomal localization and promoter characterization.
abstract: Senile plaques are primarily comprised of deposits of the beta-amyloid precursor-like proteins APLP1 and APLP2. proteins (APPs). APP is a member of a gene family, including amyloid precursor-like proteins APLP1 and APLP2. Using interspecific mouse backcross mapping, we localized the mouse APLP2 gene to the promixmal region of mouse chromosome 9, syntenic with a region of human 11q. We cloned an approximately 1.2-kilobase mouse genomic fragment containing the APLP2 gene promoter. The APLP2 promoter lacks a typical TATA box, is GC-rich, and contains several sequences for transcription factor binding. S1 nuclease protection analysis revealed the presence of multiple transcription start sites. The lack of a TATA box, the presence of a high GC content, and multiple transcription start sites place the APLP2 promoter in the class of promoters of "housekeeping genes." Regulatory regions within the promoter were assayed by transfection of mouse N2a and Ltk- cells with constructs containing progressive 5'-deletions of the APLP2 promoter fused to the bacterial chloramphenicol acetyl transferase (CAT) reporter gene. A minimal region that includes sequences 99 bp upstream of the predominant transcription start site of the APLP2 promoter was sufficient to direct high levels of CAT expression.
authors.affiliation: Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205-2196, USA.
authors.forename: C S
authors.initials: CS
authors.lastname: von Koch
authors.forename: D K
authors.initials: DK
authors.lastname: Lahiri
authors.forename: A L
authors.initials: AL
authors.lastname: Mammen
authors.forename: N G
authors.initials: NG
authors.lastname: Copeland
authors.forename: D J
authors.initials: DJ
authors.lastname: Gilbert
authors.forename: N A
authors.initials: NA
authors.lastname: Jenkins
authors.forename: S
authors.initials: S
authors.lastname: Sisodia
mesh_terms: D000544:Alzheimer Disease / Q000235:genetics; D016564:Amyloid beta-Protein Precursor / Q000235:genetics*; D000818:Animals; D001483:Base Sequence; D015500:Chloramphenicol O-Acetyltransferase / Q000096:biosynthesis / Q000235:genetics; D002874:Chromosome Mapping; D003001:Cloning, Molecular; D003433:Crosses, Genetic; D004252:DNA Mutational Analysis; D005260:Female; D005786:Gene Expression Regulation; D017930:Genes, Reporter; D015698:Genomic Library; D051379:Mice; D008969:Molecular Sequence Data; D009115:Muridae; D009419:Nerve Tissue Proteins / Q000235:genetics*; D011401:Promoter Regions, Genetic / Q000235:genetics*; D012333:RNA, Messenger / Q000096:biosynthesis; D014158:Transcription, Genetic
chemical_list: C489697:APLP1 protein, human; D016564:Amyloid beta-Protein Precursor; C078201:Aplp1 protein, mouse; C492952:Aplp2 protein, mouse; D009419:Nerve Tissue Proteins; D012333:RNA, Messenger; D015500:Chloramphenicol O-Acetyltransferase