Wnt-16a, a Novel Wnt-16 Isoform, Which Shows Differential Expression in Adult Human Tissues

The WNT genes encode a large family of secreted glycoprotein signalling molecules important from the earliest stages of development through to the adult. We have identified a novel isoform of the recently described WNT family member, Wnt16, following analysis of chromosome 7q31 genomic sequence. We...

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Bibliographic Details
Published in:Biochemical and biophysical research communications 2000-11, Vol.278 (3), p.814-820
Main Authors: Fear, Mark W., Kelsell, David P., Spurr, Nigel K., Barnes, Michael R.
Format: Article
Language:English
Subjects:
5' Untranslated Regions - genetics
Adult
Amino Acid Sequence
Animals
Base Sequence
chromosome 7
E2A-PBX1
Exons
Female
Frizzled
Gene Expression Regulation
gene prediction
Glycoproteins - genetics
Humans
isoform
Mice
Molecular Sequence Data
oncogene
Placenta - metabolism
Polymerase Chain Reaction
Pregnancy
promoter analysis
Protein Isoforms - genetics
RNA, Messenger - genetics
Sequence Alignment
Sequence Homology, Amino Acid
Transcription, Genetic
WNT
WNT gene
Wnt Proteins
Wnt-16a gene
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Summary:The WNT genes encode a large family of secreted glycoprotein signalling molecules important from the earliest stages of development through to the adult. We have identified a novel isoform of the recently described WNT family member, Wnt16, following analysis of chromosome 7q31 genomic sequence. We find differential organisation of Wnt16 with the generation of two mRNA isoforms, Wnt16a and Wnt16b. These isoforms differ in the composition of their 5′-UTR and first exons and show evidence of differential expression. In normal human tissues, Wnt16a is expressed at significant levels only in the pancreas, whereas Wnt16b is expressed more ubiquitously with highest levels in adult kidney, placenta, brain, heart, and spleen. Wnt16 is one of a growing number of WNT genes showing evidence of distinct isoforms. We present evidence to suggest that these isoforms may be regulated from alternative promoters and discuss the potential functional differentiation afforded by these WNT isoforms. This may reveal subtle new mechanisms of regulation of WNT expression and function.
ISSN:0006-291X
1090-2104
DOI:10.1006/bbrc.2000.3852