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Titolo:
COMPARISON OF A VITELLOGENIN GENE BETWEEN 2 DISTANTLY BELATED RHABDITID NEMATODE SPECIES
Autore:
WINTER CE; PENHA C; BLUMENTHAL T;
Indirizzi:
USP,INST CIENCIAS BIOMED,DEPT PARASITOL,AV PROF LINEU PRESTES 1374 BR-05508900 SAO PAULO BRAZIL INDIANA UNIV,DEPT BIOL BLOOMINGTON IN 00000
Titolo Testata:
Molecular biology and evolution
fascicolo: 5, volume: 13, anno: 1996,
pagine: 674 - 684
SICI:
0737-4038(1996)13:5<674:COAVGB>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
CAENORHABDITIS-ELEGANS; NUCLEOTIDE-SEQUENCE; XENOPUS-LAEVIS; YOLK PROTEINS; LIPOVITELLIN; PRECURSOR; CHICKEN; LIPOPROTEIN; EXPRESSION; VITELLIN;
Keywords:
VITELLOGENIN; NEMATODE; CAENORHABDITIS ELEGANS; RHABDITIS; OSCHEIUS; LIPOPROTEIN; GENE EXPRESSION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
59
Recensione:
Indirizzi per estratti:
Citazione:
C.E. Winter et al., "COMPARISON OF A VITELLOGENIN GENE BETWEEN 2 DISTANTLY BELATED RHABDITID NEMATODE SPECIES", Molecular biology and evolution, 13(5), 1996, pp. 674-684

Abstract

Three vitellogenin genes from the free-living nematode Caenorhabditiselegans have previously been characterized at the molecular level. Inorder to study evolutionary relationships within this poorly understood taxon, we have cloned a vitellogenin gene, CEW1-vit-6 from a distantly related species belonging to the same family as C. elegans. Screening of a genomic library with a probe to total poly(A+) RNA yielded three clones that hybridized more intensely than all others, and all three corresponded to a single gene homologous to C. elegans vit-6. Comparison of CEW1-vit-6 with Ce-vit-6 reveals both strong similarities andsurprising differences. Like Ce-vit-6 the gene is about 5 kb long andcontains four unusually small introns (38-41 nt), but only one interrupts the gene at the same location as a Ce-vit-6 intron. The promoter region contains five matches to Vitellogenin Promoter Element 1 (VPE1)and no matches to VPE2, both previously shown to be required for vir gene transcription in C. elegans. Codon usage is in general similar tothat of the Ce-vir genes, but a few codon biases are quite different. Alignment of the CEW1-vit-6 protein with the Ce-vit-6 and Ce-vit-2 products suggests the existence of two domains which have evolved at different rates. Sequence comparison shows that nematode vitellogenins are much more closely related to vertebrate than to insect vitellogenins.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/07/20 alle ore 15:09:38