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2. Molecular cloning of human homolog of yeast GAA1 which is required for attachment of glycosylphosphatidylinositols to proteins1The sequence reported in this paper has been doposited in the GenBank, EMBL and GenBank nucleotide sequence databases with the accession number AB006969.1

Author

Hiroi, Yukio, Komuro, Issei, Chen, Rui, Hosoda, Toru, Mizuno, Takehiko, Kudoh, Sumiyo, Georgescu, Serban P, Medof, M.Edward, and Yazaki, Yoshio

Subjects
Gaa1, Glycosylphosphatidylinositol, GPI anchor, Transamidase, Signal sequence trap, Antisense
Abstract

Anchoring proteins to cell surface membranes by glycosylphosphatidylinositols (GPIs) is important. We have isolated a component of the putative transamidase machinery, hGaa1p (human GPI anchor attachment protein). hGAA1 cDNA is approximately 2 kb in length and codes 621 amino acids. The amino acid sequence of hGaa1p is 25% identical and 57% homologous to that of yeast Gaa1p. Moreover, Kite-Dolittle hydrophobicity plots of both proteins show marked similarity. hGAA1 gene is expressed ubiquitously and mRNA levels are higher in the undifferentiated state. Overexpression of antisense hGAA1 in human K562 cells significantly reduced the production of a reporter GPI-anchored protein.

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3. Molecular cloning of human homolog of yeast GAA1which is required for attachment of glycosylphosphatidylinositols to proteins 1

Author

Hiroi, Yukio, Komuro, Issei, Chen, Rui, Hosoda, Toru, Mizuno, Takehiko, Kudoh, Sumiyo, Georgescu, Serban P, Medof, M.Edward, and Yazaki, Yoshio

Abstract

Anchoring proteins to cell surface membranes by glycosylphosphatidylinositols (GPIs) is important. We have isolated a component of the putative transamidase machinery, hGaa1p (human GPI anchor attachment protein). hGAA1cDNA is approximately 2 kb in length and codes 621 amino acids. The amino acid sequence of hGaa1p is 25% identical and 57% homologous to that of yeast Gaa1p. Moreover, Kite‐Dolittle hydrophobicity plots of both proteins show marked similarity. hGAA1gene is expressed ubiquitously and mRNA levels are higher in the undifferentiated state. Overexpression of antisense hGAA1 in human K562 cells significantly reduced the production of a reporter GPI‐anchored protein.

Published
1998
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