The Xenopus homologue of hepatocyte growth factor-like protein is specifically expressed in the presumptive neural plate during gastrulation.
Using a RT-PCR approach, we were able to isolate a cDNA encoding the Xenopus homologue of hepatocyte growth factor-like protein, which we have termed accordingly Xhl. The deduced Xhl protein consists of 717 amino acids, contains four putative kringle domains and a serine protease-like domain characteristic for mammalian HGF and HGF-like protein. The mRNA of Xhl is exclusively expressed in the midline of the prospective neural plate during the period of neural induction, only. Ectopic expression of Xhl causes a 'spina bifida'-like phenotype with enlargement of neural tissue. Activation of Xhl mRNA transcription can be induced by delayed reaggregation of animal caps and appears to require vertical rather than planar signals from the organizer. These data suggest that Xhl is involved in the formation of the embryonic nervous system of Xenopus.
Aberger
F
F
Institute of Genetics and Developmental Biology, University of Salzburg, Austria.
Schmidt
G
G
Richter
K
K
D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D002490:Central Nervous System / Q000196:embryology* / Q000378:metabolism; D003001:Cloning, Molecular; D004475:Ectoderm / Q000378:metabolism; D004627:Embryonic Induction; D005775:Gastrula / Q000378:metabolism* / Q000648:ultrastructure; D018507:Gene Expression Regulation, Developmental; D006133:Growth Substances / Q000096:biosynthesis* / Q000235:genetics; D017228:Hepatocyte Growth Factor / Q000096:biosynthesis; D006801:Humans; D036341:Intercellular Signaling Peptides and Proteins; D051379:Mice; D008969:Molecular Sequence Data; D009024:Morphogenesis / Q000235:genetics; D011518:Proto-Oncogene Proteins; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid; D013045:Species Specificity; D014158:Transcription, Genetic; D029867:Xenopus Proteins; D014982:Xenopus laevis / Q000196:embryology / Q000235:genetics*
D006133:Growth Substances; D036341:Intercellular Signaling Peptides and Proteins; D011518:Proto-Oncogene Proteins; D029867:Xenopus Proteins; C099224:hepatocyte growth factor-like protein, Xenopus; C082332:macrophage stimulating protein; D017228:Hepatocyte Growth Factor