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PMID: 1279693 Published · ppublish English Comparative Study Journal Article Research Support, U.S. Gov't, P.H.S.

Identification of a mouse brain cDNA that encodes a protein related to the Alzheimer disease-associated amyloid beta protein precursor.

Wasco W, Bupp K, Magendantz M, Gusella JF, Tanzi RE, Solomon F

Abstract

We have isolated a cDNA from a mouse brain library that encodes a protein whose predicted amino acid sequence is 42% identical and 64% similar to that of the amyloid beta protein precursor (APP). This 653-amino acid protein, which we have termed the amyloid precursor-like protein (APLP), appears to be similar to APP in overall structure as well as amino acid sequence. The amino acid homologies are concentrated within three distinct regions of the two proteins where the identities are 47%, 54%, and 56%. The APLP cDNA hybridizes to two messages of approximately 2.4 and 1.6 kilobases that are present in mouse brain and neuroblastoma cells. Polyclonal antibodies raised against a peptide derived from the C terminus of APLP stain the cytoplasm in a pattern reminiscent of Golgi staining. In addition to APP, APLP also displays significant homology to the Drosophila APP-like protein APPL and a rat testes APP-like protein. These data indicate that the APP gene is a member of a strongly conserved gene family. Studies aimed at determining the functions of the proteins encoded by this gene family should provide valuable clues to their potential role in Alzheimer disease neuropathology.

MeSH Terms
Amino Acid Sequence Amyloid beta-Protein Precursor/analogs & derivatives,analysis,genetics Animals Base Sequence Blotting, Northern Blotting, Western Brain/physiology Cloning, Molecular DNA/genetics,isolation & purification Humans Mice Microtubule-Associated Proteins/genetics Molecular Sequence Data Neuroblastoma Poly A/genetics,isolation & purification RNA/genetics,isolation & purification RNA, Messenger Recombinant Proteins/analysis,isolation & purification Restriction Mapping Sequence Homology, Amino Acid Tumor Cells, Cultured
Chemicals
APLP1 protein, human Amyloid beta-Protein Precursor Aplp1 protein, mouse Microtubule-Associated Proteins RNA, Messenger Recombinant Proteins Poly A RNA DNA
Authors & Affiliations
6 authors, click to expand affiliations / ORCID
Wasco W
Department of Biology, Massachusetts Institute of Technology, Cambridge 02139.
Bupp K
Magendantz M
Gusella J F
Tanzi R E
Solomon F
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Article Info
Journal
Proceedings of the National Academy of Sciences of the United States of America
Abbr.
Proc Natl Acad Sci U S A
ISSN
0027-8424
Published
1992-11-15
Pages
10758-62
Language
English
Region
United States
NLM ID
7505876
PMCID
PMC50421
Subset
IM
Grants
NCI NIH HHS · CA53395 · United States
NINDS NIH HHS · R01 NS-30428-01 · United States
Databases
GENBANK
L04538
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