ZFIN ID: ZDB-PUB-000824-5
Genes dependent on zebrafish cyclops function identified by AFLP differential gene expression screen
Rubinstein, A.L., Lee, D., Luo, R., Henion, P.D., and Halpern, M.E.
Date: 2000
Source: Genesis (New York, N.Y. : 2000)   26(1): 86-97 (Journal)
Registered Authors: Halpern, Marnie E., Henion, Paul, Luo, Rushu, Rubinstein, Amy
Keywords: calreticulin; retroelement; neural crest; mesendoderm; gastrulation
MeSH Terms:
  • Animals
  • Calcium-Binding Proteins/genetics*
  • Calcium-Binding Proteins/physiology
  • Calreticulin
  • DNA, Complementary/genetics
  • Embryo, Nonmammalian/metabolism
  • Gastrula/metabolism
  • Gastrula/ultrastructure
  • Gene Amplification
  • Gene Expression Profiling*
  • Gene Expression Regulation, Developmental*
  • Genes*
  • Homeodomain Proteins/physiology
  • In Situ Hybridization
  • Intracellular Signaling Peptides and Proteins
  • Molecular Sequence Data
  • Morphogenesis/genetics
  • Multigene Family
  • Nerve Tissue Proteins/genetics*
  • Nerve Tissue Proteins/physiology
  • Neural Crest/metabolism
  • Nodal Protein
  • Polymorphism, Genetic
  • Ribonucleoproteins/genetics*
  • Ribonucleoproteins/physiology
  • Signal Transduction/genetics
  • Transcription Factors/physiology
  • Transforming Growth Factor beta/genetics
  • Transforming Growth Factor beta/physiology*
  • Zebrafish/embryology
  • Zebrafish/genetics*
  • Zebrafish Proteins*
PubMed: 10660676 Full text @ Genesis
Zebrafish cyclops (cyc) encodes a Transforming Growth Factor beta (TGFbeta) signaling factor closely related to mouse Nodal. By comparing amplified fragment length polymorphisms (AFLP) from cyc mutant and wild-type cDNA pools, we devised a differential gene expression screen to isolate genes whose expression is dependent on Cyc signaling. We report two genes not previously described in the zebrafish that were identified using this approach. The first gene, crestin, is expressed predominantly in premigratory and migrating neural crest cells during somitogenesis stages. crestin expression is reduced in cyc mutants initially but recovers by late somitogenesis. The second gene encodes the zebrafish homologue of the calcium-binding protein, calreticulin. Zebrafish calreticulin is highly expressed in the hatching gland and in the floor plate, tissues that are affected in cyc mutants. During gastrulation, calreticulin transcripts are found in the dorsal mesendoderm, in the same cells that express the cyc gene. Expression is reduced in cyc mutants and is abolished by the one-eyed pinhead (oep) mutation that is presumed to prevent Nodal signaling. The identification of calreticulin suggests that a differential screen between wild-type and mutant cDNA is a useful approach to reveal regulation of unexpected gene expression in response to cellular signals.