A second p53-related protein, p73L, with high homology to p73

Biochem Biophys Res Commun. 1998 Jul 30;248(3):603-7. doi: 10.1006/bbrc.1998.9013.


The p53 protein, which regulates the rate of cell division and death, is the most frequently mutated tumor suppressor to be identified so far in human cancers. Recently, a gene with significant homology to p53, termed p73, has been identified in a chromosomal region that is implicated in the molecular pathogenesis of neuroblastoma. We have cloned a second human p53-related gene, termed p73L, which shows strong amino-acid similarity to p73. The p73L gene is mapped to human chromosome 3q27-28 using in situ hybridization technique. p73L encodes a protein of 586 amino acids and its putative DNA binding domain (DBD) has high identities to those of p53 (60.6%) and to p73 (87.8%). Northern blot analysis, which demonstrated that the expression profiles of p73L and p73 mRNAs are distinct in some tissues, implies that p73 and p73L may have separate, distinct roles in different tissues.

MeSH terms

  • Amino Acid Sequence
  • Animals
  • Chromosome Mapping
  • Chromosomes, Human, Pair 3*
  • DNA-Binding Proteins / biosynthesis*
  • DNA-Binding Proteins / chemistry*
  • DNA-Binding Proteins / genetics
  • Genes, Tumor Suppressor*
  • Humans
  • Mice
  • Molecular Sequence Data
  • Molecular Weight
  • Nuclear Proteins / biosynthesis*
  • Nuclear Proteins / chemistry*
  • Nuclear Proteins / genetics
  • Organ Specificity
  • Phosphoproteins
  • Protein Biosynthesis
  • Sequence Alignment
  • Sequence Homology, Amino Acid
  • Trans-Activators
  • Transcription Factors
  • Transcription, Genetic
  • Tumor Protein p73
  • Tumor Suppressor Proteins


  • DNA-Binding Proteins
  • Nuclear Proteins
  • Phosphoproteins
  • TP63 protein, human
  • TP73 protein, human
  • Trans-Activators
  • Transcription Factors
  • Trp73 protein, mouse
  • Tumor Protein p73
  • Tumor Suppressor Proteins

Associated data

  • GENBANK/AB010152
  • GENBANK/AB010153