Human Molecular Genetics, Vol 7, 1169-1178, Copyright © 1998 by Oxford University Press
T Roberts, O Chernova and JK Cowell
Molecular cloning of the breakpoints of a t(1;10)(p22q21) constitutional
translocation breakpoint in a patient with stage 4S neuroblastoma has
identified two genes which are fused in-frame to generate a novel gene. The
1p22 gene, which we have called NB4S , encodes a 7.5 kb transcript with an
810 amino acid open reading frame and is expressed in a wide variety of
tissues. NB4S has >88% homology with the mouse EVI -5 gene within the
coding region and shows strong homology over a 200 amino acid region with
TBC1 box motif genes involved in cell growth and differentiation. The
C-teminal end of the protein contains a number of coiled coil domains,
indicating a possible protein-protein binding function. The chromosome 10
breakpoint interrupts a novel transcript (TRNG10) which could only be
detected in tumor cells. This transcript has no exon/intron structure or
significant open reading frame, suggesting that it is a structural RNA
which is transcribed but not translated. The chromosome rearrangement
creates a fusion gene product which combines the TBC1 motif of NB4S with a
polyadenylation signal from TRNG10 , potentially generating a truncated
protein with oncogenic properties.
ARTICLES
NB4S, a member of the TBC1 domain family of genes, is truncated as a result of a constitutional t(1;10)(p22;q21) chromosome translocation in a patient with stage 4S neuroblastoma
Department of Neurosciences-NC30, Lerner Research Institute, Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, OH 44195, USA.
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