fr
Article scientifique
Anglais

C21orf5, a novel human chromosome 21 gene, has a Caenorhabditis elegans ortholog (pad-1) required for embryonic patterning

Publié dansGenomics, vol. 68, no. 1, p. 30-40
Date de publication2000
Résumé

To contribute to the development of the transcription map of human chromosome 21 (HC21), we isolated a new transcript, C21orf5 (chromosome 21 open reading frame 5), encoding a predicted 2298-amino-acid protein. Analysis of the genomic DNA sequence revealed that C21orf5 consists of 37 exons that extend over 130 kb and maps between the CBR3 (carbonyl reductase 3) and the KIAA0136 genes. Northern blot analyses showed a ubiquitously expressed RNA species of 8.5 kb. RNA in situ hybridization on brain sections of normal human embryos revealed a strong labeling in restricted areas of the cerebral cortex. In silico analysis of the deduced C21orf5 protein revealed several highly probable transmembrane segments but no known protein domains or homology with known proteins. However, there were significant homologies to several hypothetical Caenorhabditis elegans proteins and Drosophila melanogaster genomic sequences. To investigate the function of C21orf5, we isolated the cDNA of the C. elegans ortholog and performed double-stranded RNA-mediated genetic interference experiments. The major phenotype observed in the progeny of injected animals was embryonic lethality. Most of the tissues of the embryo failed to undergo proper patterning during gastrulation, and morphogenesis did not occur; thus we termed the ortholog pad-1, for patterning defective 1. These results indicated that pad-1 is essential for the development and the survival of C. elegans. This study provides the first example of the use of C. elegans as a model to study the function of genes on human chromosome 21 that might be involved in Down syndrome.

Mots-clés
  • Amino Acid Sequence
  • Animals
  • Base Sequence
  • Blotting, Northern
  • Body Patterning/drug effects/ genetics
  • Caenorhabditis elegans/drug effects/embryology/ genetics
  • Caenorhabditis elegans Proteins
  • Chromosomes, Human, Pair 21/ genetics
  • DNA, Complementary/chemistry/genetics
  • Embryo, Mammalian/metabolism
  • Embryo, Nonmammalian/drug effects/metabolism
  • Exons
  • Female
  • Gene Expression Regulation, Developmental
  • Genes/genetics
  • Humans
  • In Situ Hybridization
  • Introns
  • Male
  • Membrane Proteins/ genetics
  • Molecular Sequence Data
  • RNA, Double-Stranded/administration & dosage
  • RNA, Messenger/genetics/metabolism
  • Sequence Alignment
  • Sequence Analysis, DNA
  • Sequence Homology, Amino Acid
  • Tissue Distribution
  • Vesicular Transport Proteins
Citation (format ISO)
GUIPPONI, Michel et al. C21orf5, a novel human chromosome 21 gene, has a Caenorhabditis elegans ortholog (pad-1) required for embryonic patterning. In: Genomics, 2000, vol. 68, n° 1, p. 30–40. doi: 10.1006/geno.2000.6250
Fichiers principaux (1)
Article
accessLevelRestricted
Identifiants
ISSN du journal0888-7543
549vues
0téléchargements

Informations techniques

Création12.07.2010 11:58:02
Première validation12.07.2010 11:58:02
Heure de mise à jour14.03.2023 15:51:06
Changement de statut14.03.2023 15:51:06
Dernière indexation12.02.2024 18:51:43
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack