Fray, a Drosophila Serine/Threonine Kinase Homologous to Mammalian PASK, Is Required for Axonal Ensheathment

Fray is a serine/threonine kinase expressed by the peripheral glia of Drosophila, whose function is required for normal axonal ensheathment. Null fray mutants die early in larval development and have nerves with severe swelling and axonal defasciculation. The phenotype is associated with a failure o...

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Veröffentlicht in:Neuron (Cambridge, Mass.) Mass.), 2000-12, Vol.28 (3), p.793-806
Hauptverfasser: Leiserson, William M., Harkins, Elizabeth W., Keshishian, Haig
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Harkins, Elizabeth W.
Keshishian, Haig
description Fray is a serine/threonine kinase expressed by the peripheral glia of Drosophila, whose function is required for normal axonal ensheathment. Null fray mutants die early in larval development and have nerves with severe swelling and axonal defasciculation. The phenotype is associated with a failure of the ensheathing glia to correctly wrap peripheral axons. When the fray cDNA is expressed in the ensheathing glia of fray mutants, normal nerve morphology is restored. Fray belongs to a novel family of Ser/Thr kinases, the PF kinases, whose closest relatives are the PAK kinases. Rescue of the Drosophila mutant phenotype with PASK, the rat homolog of Fray, demonstrates a functional homology among these proteins and suggests that the Fray signaling pathway is widely conserved.
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Null fray mutants die early in larval development and have nerves with severe swelling and axonal defasciculation. The phenotype is associated with a failure of the ensheathing glia to correctly wrap peripheral axons. When the fray cDNA is expressed in the ensheathing glia of fray mutants, normal nerve morphology is restored. Fray belongs to a novel family of Ser/Thr kinases, the PF kinases, whose closest relatives are the PAK kinases. 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subjects Animals
Axons - metabolism
Conserved Sequence
Drosophila
Fray protein
Insect Proteins - metabolism
Larva - genetics
Larva - growth & development
Larva - metabolism
Life Sciences (General)
Molecular Sequence Data
Mutation
Myelin Sheath - metabolism
Neuroglia - metabolism
Neuroglia - pathology
PASK protein
Peripheral Nervous System - growth & development
Peripheral Nervous System - metabolism
Peripheral Nervous System - pathology
Phenotype
Protein-Serine-Threonine Kinases - biosynthesis
Protein-Serine-Threonine Kinases - genetics
Protein-Serine-Threonine Kinases - metabolism
protein-serine/threonine kinase
Sequence Homology, Amino Acid
Signal Transduction - genetics
Space life sciences
Transfection
title Fray, a Drosophila Serine/Threonine Kinase Homologous to Mammalian PASK, Is Required for Axonal Ensheathment
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