ZFIN ID: ZDB-PUB-001101-2
A zebrafish vitellogenin gene (vg3) encodes a novel vitellogenin without a phosvitin domain and may represent a primitive vertebrate vitellogenin gene
Wang, H., Yan, T., Tan, J.T., and Gong, Z.
Date: 2000
Source: Gene   256(1-2): 303-310 (Journal)
Registered Authors: Gong, Zhiyuan, Wang, Hai, Yan, Tie
Keywords: EST; fish; lipovitellin; polyserine; teleost; yolk
MeSH Terms:
  • Amino Acid Sequence
  • Animals
  • Base Sequence
  • Blotting, Northern
  • DNA/chemistry
  • DNA/genetics
  • DNA, Complementary/chemistry
  • DNA, Complementary/genetics
  • Female
  • Gene Expression
  • Male
  • Molecular Sequence Data
  • Phosvitin/genetics*
  • Phylogeny
  • RNA/genetics
  • RNA/metabolism
  • Sequence Alignment
  • Sequence Analysis, DNA
  • Sequence Homology, Amino Acid
  • Sequence Homology, Nucleic Acid
  • Tissue Distribution
  • Vertebrates/genetics
  • Vitellogenins/genetics*
  • Zebrafish/genetics*
PubMed: 11054560 Full text @ Gene
ABSTRACT
By analysis of zebrafish EST (expressed sequence tag) clones from an adult cDNA library, we have identified 44 clones, about 11% of the adult EST clones, encoding vitellogenins. These vitellogenin EST clones have been derived from at least seven distinct vitellogenin genes. One of the largest vitellogenin cDNA clones, vg3, and its 5' extended clone isolated by 5' RACE (rapid amplification of cDNA ends)-PCR, have been sequenced completely. The deduced complete sequence includes a predicted mature vitellogenin of 1233 amino acids and a truncated signal peptide of 18 amino acids. Interestingly, the predicted vitellogenin has no polyserine phosvitin domain. The lack of the phosvitin domain was confirmed by isolation and sequencing of the vg3 genomic region. Phylogenetic analysis indicates that the phosvitinless vitellogenin is an intermediate between invertebrate vitellogenins and all known vertebrate vitellogenins, and thus may represent a primitive vertebrate vitellogenin. Like other vitellogenins in vertebrates, the phosvitinless vitellogenin is also synthesized mainly in the liver and weakly in the intestine.
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