Abstract
The maturation of cell surface receptors through the secretory pathway often requires chaperones that aid in protein folding and trafficking from one organelle to another. Here we describe boca, an evolutionarily conserved gene in Drosophila melanogaster, which encodes an endoplasmic reticulum protein that is specifically required for the intracellular trafficking of members of the low-density lipoprotein family of receptors (LDLRs). Two LDLRs in flies, Arrow, which is required for Wingless signal transduction, and Yolkless, which is required for yolk protein uptake during oogenesis, both require boca function. Consequently, boca is an essential component of the Wingless pathway but is more generally required for the activities of multiple LDL receptor family members.
Publication types
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Animals
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Cell Compartmentation / genetics
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Cell Membrane / genetics
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Cell Membrane / metabolism
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Cells, Cultured
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Congenital Abnormalities / genetics
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Congenital Abnormalities / metabolism
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DNA, Complementary / analysis
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DNA, Complementary / genetics
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Drosophila Proteins / genetics
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Drosophila Proteins / isolation & purification*
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Drosophila Proteins / metabolism*
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Drosophila melanogaster / genetics
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Drosophila melanogaster / growth & development
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Drosophila melanogaster / metabolism*
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Egg Proteins / genetics
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Egg Proteins / metabolism
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Endoplasmic Reticulum / genetics
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Endoplasmic Reticulum / metabolism*
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Female
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Genes, Lethal
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Homeodomain Proteins / genetics
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Homeodomain Proteins / metabolism
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LIM-Homeodomain Proteins
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Male
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Molecular Chaperones / genetics
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Molecular Chaperones / isolation & purification*
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Molecular Chaperones / metabolism
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Molecular Sequence Data
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Phenotype
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Protein Folding
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Protein Transport / genetics*
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Proto-Oncogene Proteins / genetics
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Proto-Oncogene Proteins / metabolism*
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Receptors, Cell Surface / genetics
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Receptors, Cell Surface / metabolism
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Receptors, LDL / genetics
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Receptors, LDL / metabolism*
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Sequence Homology, Amino Acid
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Sequence Homology, Nucleic Acid
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Signal Transduction / genetics
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Transcription Factors / genetics
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Transcription Factors / metabolism
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Wnt1 Protein
Substances
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Awh protein, Drosophila
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DNA, Complementary
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Drosophila Proteins
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Egg Proteins
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Homeodomain Proteins
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LIM-Homeodomain Proteins
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Molecular Chaperones
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Proto-Oncogene Proteins
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Receptors, Cell Surface
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Receptors, LDL
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Transcription Factors
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Wnt1 Protein
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boca protein, Drosophila
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vitellogenin receptor
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wg protein, Drosophila