The human Arg (Abl2) nonreceptor tyrosine kinase has a role in cytoskeletal rearrangements by its C-terminal F-actin- and microtubule-binding sequences. We have previously identified Arg transcripts with different 5'- and 3'-ends, named respectively long and short 1A and 1B (1AL, 1AS, 1BL, 1BS) and long and short C-termini (CTL and CTS), that have different expression patterns in various cell types. The combination of the different ends permits to predict eight putative full-length Arg transcripts and corresponding proteins. By Reverse Transcription-Long PCR we show here that all eight full-length transcripts are endogenously expressed in Caki-1 cells and the two bands, approximately 10 kDa different, shown by 1-D Western blots of Hek293T and Caki-1 lysates correspond to the full-length Arg protein isoforms with different C-termini. 2-D Western blot analysis evidenced different high molecular weight and slight acidic specific spots in Hek293T and Caki-1 lysates. The cellular localization of two Arg isoforms (1BLCTL and 1BLCTS) transfected in Caki-1 and Hek293T cells was cytoplasmic, and some differences in cytoskeleton interactions have been evidenced. Moreover, in Hek293T cells only the transfected 1BLCTS isoform gives rise to a large intracytoplasmic cylindrical structure containing phalloidin-positive amorphous actin aggregates. The presence of eight full-length Arg isoforms with different cellular expression may imply a diverse functional role in normal and neoplastic cells.

Bianchi, C., Torsello, B., Angeloni, V., Bombelli, S., Soldi, M., Invernizzi, L., et al. (2008). Eight full-length abelson related gene (Arg) isoforms are constitutively expressed in caki-1 cell line and cell distribution of two isoforms has been analyzed after transfection. JOURNAL OF CELLULAR BIOCHEMISTRY, 105(5), 1219-1227 [10.1002/jcb.21922].

Eight full-length abelson related gene (Arg) isoforms are constitutively expressed in caki-1 cell line and cell distribution of two isoforms has been analyzed after transfection

BIANCHI, CRISTINA;TORSELLO, BARBARA ROSA;ANGELONI, VALENTINA;BOMBELLI, SILVIA;INVERNIZZI, LARA;BRAMBILLA, PAOLA;PEREGO, ROBERTO
2008-12-01

Abstract

The human Arg (Abl2) nonreceptor tyrosine kinase has a role in cytoskeletal rearrangements by its C-terminal F-actin- and microtubule-binding sequences. We have previously identified Arg transcripts with different 5'- and 3'-ends, named respectively long and short 1A and 1B (1AL, 1AS, 1BL, 1BS) and long and short C-termini (CTL and CTS), that have different expression patterns in various cell types. The combination of the different ends permits to predict eight putative full-length Arg transcripts and corresponding proteins. By Reverse Transcription-Long PCR we show here that all eight full-length transcripts are endogenously expressed in Caki-1 cells and the two bands, approximately 10 kDa different, shown by 1-D Western blots of Hek293T and Caki-1 lysates correspond to the full-length Arg protein isoforms with different C-termini. 2-D Western blot analysis evidenced different high molecular weight and slight acidic specific spots in Hek293T and Caki-1 lysates. The cellular localization of two Arg isoforms (1BLCTL and 1BLCTS) transfected in Caki-1 and Hek293T cells was cytoplasmic, and some differences in cytoskeleton interactions have been evidenced. Moreover, in Hek293T cells only the transfected 1BLCTS isoform gives rise to a large intracytoplasmic cylindrical structure containing phalloidin-positive amorphous actin aggregates. The presence of eight full-length Arg isoforms with different cellular expression may imply a diverse functional role in normal and neoplastic cells.
Articolo in rivista - Articolo scientifico
Scientifica
Cell Line, Tumor; Protein-Tyrosine Kinases; Isoenzymes; Cells, Cultured; Transfection; Microscopy, Fluorescence; Humans
English
Bianchi, C., Torsello, B., Angeloni, V., Bombelli, S., Soldi, M., Invernizzi, L., et al. (2008). Eight full-length abelson related gene (Arg) isoforms are constitutively expressed in caki-1 cell line and cell distribution of two isoforms has been analyzed after transfection. JOURNAL OF CELLULAR BIOCHEMISTRY, 105(5), 1219-1227 [10.1002/jcb.21922].
Bianchi, C; Torsello, B; Angeloni, V; Bombelli, S; Soldi, M; Invernizzi, L; Brambilla, P; Perego, R
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10281/13065
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