Praja1, a novel gene encoding a RING-H2 motif in mouse development

L. Mishra, R. E. Tully, S. P.S. Monga, Ping Yu, Tao Cai, W. Makalowski, E. Mezey, W. J. Pavan, B. Mishra

Research output: Contribution to journalArticlepeer-review

38 Scopus citations


As part of a cloning strategy to identify genes involved in early mouse liver development we have isolated Praja1, a gene with similar sequences to the Drosophila melanogaster gene goliath (gl) which is involved in the fate of mesodermal cells ultimately forming gut musculatures, fat body, and the heart. Praja1 is a 2.1 kb gene encoding a putative 396 amino acid ORF and includes a COOH-terminal RING-H2 domain. Using the Jackson Laboratory BSS panel, we have localized Praja1 on chromosome X at 36 cM, which may be a candidate gene for mouse sla (sex linked sideroblastic anemia), near the X inactivation center gene, Xist. Northern blot analysis demonstrated three transcripts (3.1, 2.6 and 2.1 kb) in mRNA from adult mouse tissues brain, liver, and kidney as well as in mRNA from developing mouse embryos (days 7, 11, 15 and 17 post coitus, p.c.). In vitro transcription/translation yielded a product with an M(r) of 59 kD, Immunohistochemical staining of in vitro liver explant cultures using a heterologous antibody against praja1 demonstrated cytoplasmic staining of cuboidal cells that have hepatocyte morphology and organization. The presence of the RING-H2 domain, a proline-rich region at the COOH-end, and regions rich in acidic amino acids, leads to the hypothesis that the Praja1 product is possibly inolved in mediating protein-protein interactions, possibly as part of a protein sorting or transport pathway. This is strengthened by the similarity of Praja1 to rat Neurodap1, whose product has been localize to the endoplasmic reticulum and golgi in brain.

Original languageEnglish (US)
Pages (from-to)2361-2368
Number of pages8
Issue number19
StatePublished - 1997


  • Chromosome
  • Explant cultures
  • Liver development
  • Localization
  • Molecular cloning
  • Prajal gene PRAJA1 protein
  • RING-H2 domain

ASJC Scopus subject areas

  • Molecular Biology
  • Genetics
  • Cancer Research


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