Amino acid substitution (Ile194----Thr) in exon 5 of the lipoprotein lipase gene causes lipoprotein lipase deficiency in three unrelated probands. Support for a multicentric origin.

H E Henderson; Y Ma; M F Hassan; M V Monsalve; A D Marais; F Winkler; K Gubernator; J Peterson; J D Brunzell; M R Hayden

doi:10.1172/JCI115229

Department of Medical Genetics, University of British Columbia, Vancouver, Canada.

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Department of Medical Genetics, University of British Columbia, Vancouver, Canada.

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Department of Medical Genetics, University of British Columbia, Vancouver, Canada.

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Department of Medical Genetics, University of British Columbia, Vancouver, Canada.

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Department of Medical Genetics, University of British Columbia, Vancouver, Canada.

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Department of Medical Genetics, University of British Columbia, Vancouver, Canada.

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Department of Medical Genetics, University of British Columbia, Vancouver, Canada.

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Department of Medical Genetics, University of British Columbia, Vancouver, Canada.

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Department of Medical Genetics, University of British Columbia, Vancouver, Canada.

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Department of Medical Genetics, University of British Columbia, Vancouver, Canada.

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Published in Volume 87, Issue 6 on June 1, 1991
J Clin Invest. 1991;87(6):2005–2011. https://doi.org/10.1172/JCI115229.
© 1991 The American Society for Clinical Investigation

Published June 1, 1991 - Version history

Studies on the molecular biology of lipoprotein lipase (LPL) deficiency have been facilitated by the availability of LPL gene probes and the recent characterization of gene mutations underlying human LPL deficiency. Typically, missense mutations have predominated and show a preferential localization to exons 4 and 5. This distribution supports earlier studies attributing functional significance to residues encoded by these exons. We now report a further missense mutation within exon 5 of the LPL gene in three unrelated patients. Amplification of individual exons by the polymerase chain reaction and direct sequencing revealed a T----C transition at codon 194 of the LPL cDNA which results in a substitution of threonine for isoleucine at this residue. The catalytic abnormality induced by this mutation was confirmed through in vitro mutagenesis studies in COS-1 cells. Transfection with a LPL cDNA containing the codon 194 transition resulted in the synthesis and secretion of a catalytically defective protein. The Thr194 substitution was associated with two different DNA haplotypes, consistent with a multicentric origin for this mutation.

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Amino acid substitution (Ile194----Thr) in exon 5 of the lipoprotein lipase gene causes lipoprotein lipase deficiency in three unrelated probands. Support for a multicentric origin.

H E Henderson, Y Ma, M F Hassan, M V Monsalve, A D Marais, F Winkler, K Gubernator, J Peterson, J D Brunzell, and M R Hayden

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Amino acid substitution (Ile194----Thr) in exon 5 of the lipoprotein lipase gene causes lipoprotein lipase deficiency in three unrelated probands. Support for a multicentric origin.

H E Henderson, Y Ma, M F Hassan, M V Monsalve, A D Marais, F Winkler, K Gubernator, J Peterson, J D Brunzell, and M R Hayden

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