Nucleic Acids Research, 1984, Vol. 12, No. 9 3917-3932
© 1984
MOLECULAR BIOLOGY |
Human apoHpoprotetas AI, AII, CII and CIII. cDNA sequences and mRNA abundance
Sir William Dunn School of Pathology, University of Oxford South Parks Road, Oxford OX1 3RE, UK
*To whom reprint requests should be sent
Received March 27, 1984. Accepted April 9, 1984.
The structure and function of the genes encoding the polypeptide components of plasma lipoproteins are of interest because of the central role they play in the regulation of lipid metabolism. We have now completed our previous studies on the human apoAI gene and furthermore isolated and sequenced cDNA clones for apoAII, CII and CIII. The nuoleotide sequences show the signal peptides of apoAII, CII and CIII to be 18, 22 and 20 amino acids in length, respectively, and in addition that prepro apoAII bears a classical propeptide structure of 5 amino acids. The amino acid homology deteoted between apoCII and pro-apoAI is discussed, as is the gene arrangement of the 5' non-coding region of apoAI mRNA. The relative liver mRNA levels of the 4 apolipoproteins analysed in this study have been estimated and compared with their corresponding plasma products. The data reported here provide an essential basis for further studies of structural and functional alleles of apo AI, AII, CII and CIII genes.
1On leave of absence from Laboratory of Molecular Biology, Farmitalia Carlo Erba, Via Bezzi 24, 20100 Milan, Italy.
2Present address: Institut Curie, Unite Inserm 255, 26 rue d'Ulni, 75005 Paris, France.
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