PUBLICATION

Characterization of the transglutaminase gene family in zebrafish and in vivo analysis of transglutaminase-dependent bone mineralization

Authors
Deasey, S., Grichenko, O., Du, S., and Nurminskaya, M.
ID
ZDB-PUB-110803-55
Date
2012
Source
Amino Acids   42(2-3): 1065-1075 (Journal)
Registered Authors
Du, Shao Jun (Jim)
Keywords
Transglutaminase, inhibitors, zebrafish, bone development
MeSH Terms
  • Animals
  • Base Sequence
  • Calcification, Physiologic*
  • DNA Primers
  • In Situ Hybridization
  • Multigene Family*
  • Real-Time Polymerase Chain Reaction
  • Transglutaminases/antagonists & inhibitors
  • Transglutaminases/genetics*
  • Zebrafish/genetics*
PubMed
21809079 Full text @ Amino Acids
Abstract
We have characterized the protein cross-linking enzyme transglutaminase (TGs) genes in zebrafish, Danio rerio, based on the analysis of their genomic organization and phylogenetics. Thirteen zebrafish TG genes (zTGs) have been identified, of which 11 show high homology to only 3 mammalian enzymes: TG1, TG2 and FXIIIa. No zebrafish homologues were identified for mammalian TGs 3-7. Real-time PCR analysis demonstrated distinct temporal expression profiles for zTGs in larvae and adult fish. Analysis by in situ hybridization revealed restricted expression of zTG2b and zFXIIIa in skeletal elements, resembling expression of their mammalian homologues in osteo-chondrogenic cells. Mammalian TG2 and FXIIIa have been implicated in promoting osteoblast differentiation and bone mineralization in vitro, however, mouse models lacking either gene have no skeletal phenotype likely due to a compensation effect. We show in this study that mineralization of the newly formed vertebrae is significantly reduced in fish grown for 5 days in the presence of TG inhibitor KCC-009 added at 3–5 days post fertilization. This treatment reduces average vertebrae mineralization by 30%, with complete inhibition in some fish, and no effect on the overall growth and vertebrae number. This is the first in vivo demonstration of the crucial requirement for the TG-catalyzed cross-linking activity in bone mineralization.
Genes / Markers
Figures
Show all Figures
Expression
Phenotype
Mutation and Transgenics
Human Disease / Model Data
Sequence Targeting Reagents
Fish
Antibodies
Orthology
Engineered Foreign Genes
Mapping
Errata and Notes