ZFIN ID: ZDB-PUB-070330-14
Cloning and expression of zebrafish genes encoding the heme synthesis enzymes uroporphyrinogen III synthase (UROS) and protoporphyrinogen oxidase (PPO)
Hanaoka, R., Dawid, I.B., and Kawahara, A.
Date: 2007
Source: DNA sequence : the journal of DNA sequencing and mapping   18(1): 54-60 (Journal)
Registered Authors: Dawid, Igor B., Hanaoka, Ryuki, Kawahara, Atsuo
Keywords: Heme synthesis, UROS, PPO, zebrafish
MeSH Terms:
  • Animals
  • Base Sequence
  • Cloning, Molecular
  • DNA Primers
  • Gene Expression Regulation, Developmental
  • Gene Expression Regulation, Enzymologic
  • Heme/biosynthesis*
  • In Situ Hybridization
  • Protoporphyrinogen Oxidase/chemistry
  • Protoporphyrinogen Oxidase/genetics*
  • Uroporphyrinogen III Synthetase/chemistry
  • Uroporphyrinogen III Synthetase/genetics
  • Zebrafish/genetics*
PubMed: 17364814 Full text @ DNA Seq.
Heme is synthesized from glycine and succinyl CoA by eight heme synthesis enzymes. Although genetic defects in any of these enzymes are known to cause severe human blood diseases, their developmental expression in mammals is unknown. In this paper, we report two zebrafish heme synthesis enzymes, uroporphyrinogen III synthase (UROS) and protoporphyrinogen oxidase (PPO) that are well conserved in comparison to their human counterparts. Both UROS and PPO formed pairs of bilateral stripes in the lateral plate mesoderm at the 15-somite stage. At 24 h post-fertilization (hpf), UROS and PPO were predominantly expressed in the intermediate cell mass (ICM) that is the major site of primitive hematopoiesis. The expression of UROS and PPO was drastically suppressed in the bloodless mutants cloche and vlad tepes/gata 1 from 15-somite to 24hpf stages, indicating that both cloche and vlad tepes/gata 1 are required for the induction and maintenance of UROS and PPO expression in the ICM.