The NK-2 homeobox gene scarecrow ( scro) is expressed in pharynx, ventral nerve cord and brain of Drosophila embryos

Members of the NK homeobox family have been widely conserved during evolution. Here we describe the sequence and expression of a novel Drosophila NK-2 homeobox gene, named scarecrow ( scro), which shows considerable homology to vertebrate Nkx-2.1. During embryogenesis, scro expression is initially o...

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Veröffentlicht in:Mechanisms of development 2000-06, Vol.94 (1), p.237-241
Hauptverfasser: Zaffran, Stéphane, Das, Gishnu, Frasch, Manfred
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Das, Gishnu
Frasch, Manfred
description Members of the NK homeobox family have been widely conserved during evolution. Here we describe the sequence and expression of a novel Drosophila NK-2 homeobox gene, named scarecrow ( scro), which shows considerable homology to vertebrate Nkx-2.1. During embryogenesis, scro expression is initially observed in the pharyngeal primordia and later maintained in the pharynx. During band germ retraction, scro expression appears in two bilateral clusters of procephalic neuroblasts that give rise to distinct neuronal clusters in the brain. In addition, scro expression is observed in segmental clusters of neuronal precursors in the ventral nerve cord. In larval stages, scro expression occurs in portions of the optic lobe regions. These observations indicate that scro and vertebrate Nkx2.1 share similarities both in terms of their sequence and their expression patterns.
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source MEDLINE; Access via ScienceDirect (Elsevier); EZB-FREE-00999 freely available EZB journals
subjects Amino Acid Sequence
Animals
Brain - embryology
Central nervous system
Central Nervous System - embryology
Drosophila
Drosophila - embryology
Drosophila - genetics
Embryo, Nonmammalian
Ganglia, Invertebrate - embryology
Gene Expression Regulation, Developmental
Homeodomain
Homeodomain Proteins - genetics
Homeodomain Proteins - metabolism
Molecular Sequence Data
NK-2
Nuclear Proteins - genetics
Nuclear Proteins - metabolism
Optic lobe
Pharynx
Pharynx - embryology
Sequence Homology, Amino Acid
Thyroid Nuclear Factor 1
Transcription Factors - genetics
Transcription Factors - metabolism
title The NK-2 homeobox gene scarecrow ( scro) is expressed in pharynx, ventral nerve cord and brain of Drosophila embryos
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