DDC-4, an apoptosis-associated gene, is a secreted frizzled relative.
The differential display method has been used in our laboratory as a coincidence analysis to isolate genes expressed in common in each of three different rat tissues undergoing physiological apoptosis: mammary gland, ovarian corpus luteum and ventral prostate. The most interesting of these isolates, DDC-4, shows a clear association with apoptosis, its expression being confined to these three organs, and only during their involution. Using DDC-4 as probe, we screened a rat ovarian cDNA library to obtain full-length isolates. One isolate, Y81 clone 40, gives rise to a protein of approximately 40 kDa with coupled in vitro transcription/translation. Sequencing of this clone indicates an open reading frame of 1044 nucleotides encoding a protein of 39.7 kDa with a putative signal sequence. This clone exhibits a high homology with the cysteine-rich domain, i.e. the ligand-binding domain, of the fizzled gene family originally defined as tissue polarity genes in Drosophila. The homology of Y81 clone 40 is most extensive with the newly described secreted frizzled relatives, the frzb subfamily.
Wolf
V
V
Department of Clinical Research, University of Berne, Switzerland.
Ke
G
G
Dharmarajan
A M
AM
Bielke
W
W
Artuso
L
L
Saurer
S
S
Friis
R
R
D000595:Amino Acid Sequence; D000818:Animals; D017209:Apoptosis; D001483:Base Sequence; D002352:Carrier Proteins / Q000096:biosynthesis* / Q000737:chemistry / Q000235:genetics*; D003338:Corpus Luteum / Q000502:physiology*; D004330:Drosophila / Q000235:genetics; D029721:Drosophila Proteins; D005260:Female; D051157:Frizzled Receptors; D006801:Humans; D007301:Insect Hormones / Q000235:genetics; D008297:Male; D008321:Mammary Glands, Animal / Q000502:physiology*; D008565:Membrane Proteins / Q000737:chemistry / Q000235:genetics*; D008969:Molecular Sequence Data; D005810:Multigene Family; D016366:Open Reading Frames; D016133:Polymerase Chain Reaction; D011467:Prostate / Q000502:physiology*; D014176:Protein Biosynthesis; D011518:Proto-Oncogene Proteins; D051381:Rats; D017207:Rats, Sprague-Dawley; D043562:Receptors, G-Protein-Coupled; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid; D014158:Transcription, Genetic; D000094742:Secreted Frizzled-Related Proteins
D002352:Carrier Proteins; D029721:Drosophila Proteins; D051157:Frizzled Receptors; D007301:Insect Hormones; D008565:Membrane Proteins; D011518:Proto-Oncogene Proteins; D043562:Receptors, G-Protein-Coupled; C498455:Sfrp4 protein, rat; D000094742:Secreted Frizzled-Related Proteins; C058784:fz protein, Drosophila