This paper is only available as a PDF. To read, Please Download here.
Apolipoprotein (apo) A-I is the major protein constituent of plasma high density lipoproteins (HDL). A kindred has been identified in which a glycine to arginine mutation at residue 26 in apoA-I is associated with hypoalphalipoproteinemia and hereditary systemic amyloidosis. We isolated the mutant protein, termed apoA-IIowa, from the plasma of an affected subject and studied its in vivo metabolism compared to that of normal apoA-I in two heterozygous apoA-IIowa subjects and two normal controls. Normal and mutant apoA-I were radioiodinated with 131I and 125I, respectively, reassociated with autologous plasma lipoproteins, and simultaneously injected into all subjects. Kinetic analysis of the plasma radioactivity curves demonstrated that the mutant apoA-IIowa was rapidly cleared from plasma (mean fractional catabolic rate [FCR] 0.559 day-1) compared with normal apoA-I (mean FCR 0.244 day-1) in all four subjects. The FCR of normal apoA-I was also substantially faster in the heterozygous apoA-IIowa subjects (mean FCR 0.281 days-1) than in the normal controls (mean FCR 0.203 days-1). Despite the rapid removal from plasma of apoA-IIowa, the cumulative urinary excretion of its associated radioactivity after 2 weeks (44%) of the injected dose) was substantially less than that associated with normal apoA-I (78% of injected dose), indicating extravascular sequestration of radiolabeled apoA-IIowa.(ABSTRACT TRUNCATED AT 250 WORDS)
REFERENCES
- A protein cofactor of lecithinxholesterol acyltransferase.Biochem. Biophys. Res. Commun. 1972; 46: 1493-1498
- Cholesterol efflux from cultured adipose cells is mediated by LpAI particles but not by LpAI:AII particles.Biochem. Biophys. Res. Commun. 1987; 142: 63-69
- Identification and characterization of a high density lipoprotein-binding protein in cell membranes by ligand blotting.J. Biol. Chem. 1987; 262: 7439-7442
- High-density lipoprotein — the clinical implications of recent studies.N. Engl. J. Med. 1989; 321: 1311-1316
- Associations of high-density lipoprotein subclasses and apolipoproteins with ischemic heart disease and coronary atherosclerosis.Am. Heart J. 1987; 113: 589-597
- ATMilano apoprotein. Decreased high density lipoprotein cholesterol levels with significant lipoprotein modifications and without clinical atherosclerosis in an Italian family.J. Clin. Invest. 1980; 66: 892-900
- Genetic variants of group A apolipoproteins. Rapid methods for screening and characterization without ultracentrifugation.J. Biol. Chem. 1982; 257: 501-507
- Apolipoprotein A-IGiessen (Pro143 → Arg). A mutant that is defective in activating lecithinxholesterol acyltransferase.Eur. J. Biochem. 1984; 144: 325-331
- Apolipoprotein A-I variants. Naturally occurring substitutions of proline residues affect plasma concentration of apolipoprotein A-I.J. Clin. Invest. 1989; 84: 1722-1730
- Structural analysis of human apolipoprotein A-I variants. Ami no acid substitutions are nonrandomly distributed throughout the apolipoprotein A-I primary structure.J. Biol. Chem. 1990; 265: 8610-8617
- A frameshift mutation in the human apolipoprotein A-I gene causes high density lipoprotein deficiency, partial lecithinxholesterol-acyltransferase deficiency, and corneal opacities.J. Clin. Invest. 1991; 87: 371-376
- A mutation in the human apolipoprotein A-I gene. Dominant effect on the level and characteristics of plasma high density lipoproteins.J. Biol. Chem. 1991; 266: 13654-13660
- Characterization of a new human apolipoprotein A-l Yame by direct sequencing of polymerase chain reaction-amplified DNA.J. Lipid Res. 1991; 32: 1275-1280
- Inherited predisposition to generalized amyloidosis.Neurology. 1969; 19: 10-25
- Variant apolipoprotein A-I as a major constituent of a human hereditary amyloid.Biochem. Biophys. Res. Commun. 1988; 156: 762-768
- A mutation in apolipoprotein A-I in the Iowa type of familial amyloidotic polyneuropathy.Genomics. 1990; 8: 318-323
- Plasma lipid distributions in selected North American populations: The Lipid Research Clinics Program Prevalence Study.Circulation. 1979; 60: 427-439
- The ami no acid sequence of human apoA-I, and apolipoprotein isolated from high density lipoproteins.Biochem. Biophys. Res. Commun. 1978; 80: 623-630
- Human apolipoprotein A-I and A-II metabolism.J. Lipid Res. 1982; 23: 850-862
- Evaluation of a method for study of kinetics of autologous apolipoprotein A-I.J. Lipid Res. 1991; 32: 867-875
- In vivo metabolism of apolipoprotein A-I on high density lipoprotein particles LpA-I and LpA-I, A-II.J. Lipid Res. 1991; 32: 1849-1859
- The distribution and chemical composition of ultracentrifugally separated lipoproteins in human serum.J. Clin. Invest. 1955; 34: 1345-1353
- SAAM Manual, DHEW Publ. No. (NIH) 78. National Institutes of Health, Bethesda, MD1978
- Comparison of current methods for high-density lipoprotein cholesterol quantitation.Clin. Chem. 1979; 25: 596-604
- Competitive enzyme-linked immunosorbent assay (ELISA) for the quantitation of apolipoprotein A-I using a monoclonal antibody.Clin. Chim. Acta. 1988; 178: 159-169
- Familial deficiency of apolipoproteins A-I and C-III and precocious coronary-artery disease.N. Engl. J. Med. 1982; 306: 1513-1519
- Plasma apolipoprotein A-I absence associated with a marked reduction of high density lipoproteins and premature coronary artery disease.Arteriosclerosis. 1982; 2: 16-26
- Apolipoprotein A-I deficiency due to a codon 84 nonsense mutation of the apolipoprotein AT gene.Proc. Natl. Acad. Sci. USA. 1991; 88: 2793-2797
- In vivo metabolism of apoATMiIano.Circulation. 1990; 78: (abstract): 11-389
- Increased apoA-I and apoA-II fractional catabolic rate in patients with low high density lipoprotein-cholesterol levels with or without hypertriglyceridemia.J. Clin. Invest. 1991; 87: 536-544
- Creation of “amyloid” fibrils from Bence Jones proteins in vitro.Science. 1971; 174: 712-714
- Nucleotide sequence and the encoded ami no acids of human apolipoprotein A-I mRNA.Proc. Natl. Acad. Sci. USA. 1984; 81: 66-70
- Comparative analysis of repeated sequences in rat apolipoproteins A-I, A-IV, and E..Proc. Natl. Acad. Sci. USA. 1985; 82: 992-996
- The lipid transport system in the mouse, Mus musculus: isolation and characterization of apolipoproteins B, A-I, A-II, and C-III.J. Lipid Res. 1984; 25: 954-966
- The primary structure of apolipoprotein A-I from rabbit high-density lipoprotein.Eur. J. Biochem. 1986; 160: 427-431
- The complete ami no acid sequence of proapolipoprotein A-I of chicken high density lipoproteins.FEBS Lett. 1987; 224: 261-266
- Isolation and characterization of the major plasma apolipoproteins, A-I and B, in the European badger.Meles meles. J. Lipid Res. 1986; 27: 140-149
- Structure and expression of dog apolipoprotein A-I, E, and C-I mRNAs: implications for the evolution and functional constraints of apolipoprotein structure.J. Lipid Res. 1989; 30: 1735-1746
- Analysis of the accuracy and implications of simple methods for predicting the secondary structure of globular proteins.J. Mol. Biol. 1978; 120: 97-120
- X-ray diffraction studies on amyloid filaments.J. Histochem. Cytochem. 1968; 16: 673-677
Article info
Publication history
Published online: May 01, 1992
Identification
Copyright
© 1992 ASBMB. Currently published by Elsevier Inc; originally published by American Society for Biochemistry and Molecular Biology.
User license
Creative Commons Attribution (CC BY 4.0) | How you can reuse
Elsevier's open access license policy

Creative Commons Attribution (CC BY 4.0)
Permitted
- Read, print & download
- Redistribute or republish the final article
- Text & data mine
- Translate the article
- Reuse portions or extracts from the article in other works
- Sell or re-use for commercial purposes
Elsevier's open access license policy