Genomic organization of nucleolin gene in carp fish: Evidence for several genes

Claudia Quezada, Cristina Navarro, Rody San Martín, Marco Álvarez, Alfredo Molina, M. Inés Vera

Resultado de la investigación: Article

4 Citas (Scopus)

Resumen

The protein nucleolin, functionally involved in the main steps of ribosome biogenesis, is codified by a single copy gene in mammals. Here we report that at least three different genes codify for this protein in carp fish (Cyprinus carpio). This is the first description of the genomic organization of nucleolin in a teleost. The carp nucleolin gene includes 8.8 kb and contains 16 exons. Promoter cis regulatory elements are similar to constitutive genes, i.e., a putative TATA box, three G/C boxes, and three pyrimidine-rich boxes. As in other species, carp nucleolin gene introns host three snoRNA codifying sequences: U23 from the H/ACA family and two C/D box snoRNAs, U20 and U82. Both U20 and U82 span a complementary sequence with carp 18S rRNA. Additionally, we identified two cDNAs coding for nucleolin, confirming the existence of several nucleolin genes in carp. Amino acid-derived sequence from carp cDNAs differ from mammal protein because they span additional acidic domains at the amino end, whose functional significance remains unclear. We performed amino acid sequence comparison and phylogenetic analyses showing that the three isoforms of carp nucleolin, which we describe herein, cluster in two groups. cNUC1 probably diverges from cNUC2 and cNUC3 as result of ancestral fish-specific genome duplication, indeed C. carpio is a tetraploid fish.

Idioma originalEnglish
Páginas (desde-hasta)353-365
Número de páginas13
PublicaciónBiological Research
Volumen39
N.º2
DOI
EstadoPublished - 1 ene 2006

Huella dactilar

Carps
carp
Fish
Fishes
Genes
genomics
fish
genes
Mammals
Cyprinus carpio
Complementary DNA
Small Nucleolar RNA
mammals
Amino Acid Sequence
Amino Acids
TATA box
TATA Box
regulatory sequences
Proteins
proteins

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)

Citar esto

Quezada, Claudia ; Navarro, Cristina ; San Martín, Rody ; Álvarez, Marco ; Molina, Alfredo ; Vera, M. Inés. / Genomic organization of nucleolin gene in carp fish : Evidence for several genes. En: Biological Research. 2006 ; Vol. 39, N.º 2. pp. 353-365.
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abstract = "The protein nucleolin, functionally involved in the main steps of ribosome biogenesis, is codified by a single copy gene in mammals. Here we report that at least three different genes codify for this protein in carp fish (Cyprinus carpio). This is the first description of the genomic organization of nucleolin in a teleost. The carp nucleolin gene includes 8.8 kb and contains 16 exons. Promoter cis regulatory elements are similar to constitutive genes, i.e., a putative TATA box, three G/C boxes, and three pyrimidine-rich boxes. As in other species, carp nucleolin gene introns host three snoRNA codifying sequences: U23 from the H/ACA family and two C/D box snoRNAs, U20 and U82. Both U20 and U82 span a complementary sequence with carp 18S rRNA. Additionally, we identified two cDNAs coding for nucleolin, confirming the existence of several nucleolin genes in carp. Amino acid-derived sequence from carp cDNAs differ from mammal protein because they span additional acidic domains at the amino end, whose functional significance remains unclear. We performed amino acid sequence comparison and phylogenetic analyses showing that the three isoforms of carp nucleolin, which we describe herein, cluster in two groups. cNUC1 probably diverges from cNUC2 and cNUC3 as result of ancestral fish-specific genome duplication, indeed C. carpio is a tetraploid fish.",
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Genomic organization of nucleolin gene in carp fish : Evidence for several genes. / Quezada, Claudia; Navarro, Cristina; San Martín, Rody; Álvarez, Marco; Molina, Alfredo; Vera, M. Inés.

En: Biological Research, Vol. 39, N.º 2, 01.01.2006, p. 353-365.

Resultado de la investigación: Article

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AU - Navarro, Cristina

AU - San Martín, Rody

AU - Álvarez, Marco

AU - Molina, Alfredo

AU - Vera, M. Inés

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