Item request has been placed! ×
Item request cannot be made. ×
loading  Processing Request

Differential subcellular localization, expression and biological toxicity of BRCA1 and the splice variant BRCA1-delta11b.

Item request has been placed! ×
Item request cannot be made. ×
loading   Processing Request
اقرأ على الانترنت اقرأ أكثر حفظ في قائمتي
  • معلومة اضافية
    • المصدر:
      Publisher: Nature Publishing Group Country of Publication: England NLM ID: 8711562 Publication Model: Print Cited Medium: Print ISSN: 0950-9232 (Print) Linking ISSN: 09509232 NLM ISO Abbreviation: Oncogene Subsets: MEDLINE
    • بيانات النشر:
      Publication: <2002->: Basingstoke : Nature Publishing Group
      Original Publication: Basingstoke, Hampshire, UK : Scientific & Medical Division, MacMillan Press, c1987-
    • الموضوع:
      Alternative Splicing*; BRCA1 Protein/*metabolism; Amino Acid Sequence ; Animals ; BRCA1 Protein/genetics ; BRCA1 Protein/isolation & purification ; Base Sequence ; COS Cells ; Cell Line ; Cell Nucleus/metabolism ; Cytomegalovirus/genetics ; Cytoplasm/metabolism ; Exons/genetics ; Genetic Vectors/genetics ; Humans ; Molecular Sequence Data ; Polymerase Chain Reaction/methods ; Sequence Deletion ; Transfection
    • نبذة مختصرة :
      The mechanism of BRCA1 tumor suppression in human breast and ovarian cells is the focus of intense investigation. In this report, full length BRCA1 (230 kDa) introduced into cells with CMV promoter constructs was nuclear when transgene expression was low whereas high expression resulted in cytoplasmic accumulation, aberrant nuclear and cell morphology. A nuclear localization signal (NLS) was mapped to BRCA1 amino acid positions 262-570. We describe a splice variant, BRCA1-delta11b, missing the majority of exon 11 including the NLS. Exogenous BRCA1-delta11b (110 kDa) was cytoplasmic and, unlike the full-length protein, overexpression of the protein encoded by the variant did not appear to be toxic. RNA probe titrations and RT-PCR demonstrated that BRCA1 and delta11b transcripts are coexpressed in a wide variety of cells and tissues. Interestingly, BRCA1-delta11b message was greatly reduced or absent in several breast and ovarian tumor lines relative to exon 11 transcripts and a delta9,10 splice variant. Taken together our results suggest that full-length BRCA1 and BRCA1-delta11b may have distinct roles in cell growth regulation and tumorigenesis.
    • Grant Information:
      R01 CA36827 United States CA NCI NIH HHS
    • Molecular Sequence:
      GENBANK U64805
    • الرقم المعرف:
      0 (BRCA1 Protein)
      0 (BRCA1-delta11b)
    • الموضوع:
      Date Created: 19970109 Date Completed: 19970214 Latest Revision: 20220224
    • الموضوع:
      20221213
    • الرقم المعرف:
      10.1038/sj.onc.1200924
    • الرقم المعرف:
      9010228