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  • Title: 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.
    Author: Roberts T, Chernova O, Cowell JK.
    Journal: Hum Mol Genet; 1998 Jul; 7(7):1169-78. PubMed ID: 9618176.
    Abstract:
    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.
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