Abstract
Programmed cell death regulates a number of biological phenomena, and the apoptotic signal must itself be tightly controlled to avoid inappropriate cell death. We established a genetic screen to search for molecules that inhibit the apoptotic signal from the Fas receptor. Here we report the isolation of a gene, LFG, that protects cells uniquely from Fas but not from the mechanistically related tumor necrosis factor alpha death signal. LFG is widely distributed, but remarkably is highly expressed in the hippocampus. LFG can bind to the Fas receptor, but does not regulate Fas expression or interfere with binding of an agonist antibody. Furthermore LFG does not inhibit binding of FADD to Fas.
Publication types
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Research Support, Non-U.S. Gov't
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Amino Acid Sequence
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Antigens, CD / physiology
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Apoptosis / genetics*
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Apoptosis Regulatory Proteins
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Base Sequence
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Blotting, Western
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Carrier Proteins / genetics*
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Cell Line
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Cloning, Molecular
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DNA Primers
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Down-Regulation
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Fluorescent Antibody Technique
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HeLa Cells
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Humans
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Membrane Proteins
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Molecular Sequence Data
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Precipitin Tests
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Receptors, Tumor Necrosis Factor / physiology
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Receptors, Tumor Necrosis Factor, Type I
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Sequence Homology, Amino Acid
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fas Receptor / physiology*
Substances
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Antigens, CD
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Apoptosis Regulatory Proteins
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Carrier Proteins
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DNA Primers
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FAIM2 protein, human
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Membrane Proteins
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Receptors, Tumor Necrosis Factor
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Receptors, Tumor Necrosis Factor, Type I
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fas Receptor