BTG3-AS1

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Contents

Annotated Information

Name

BTG3-AS1:BTG3 antisense RNA 1

ASBEL[1]

Characteristics

ASBEL is transcribed from the DNA strand opposite to ANA/BTG3[1].

ASBEL is transcribed from chromosome 21 (21q21.1), and encodes a conserved, 2-kb ncRNA (termed ASBEL [antisense ncRNA in the ANA/BTG3 (three) locus]). The 5' region of ASBEL is complementary to a portion of the 5' untranslated region (UTR) and the first exon of ANA/BTG3 mRNA [1].

Function

In ovarian carcinoma, ASBEL promotes tumorigenesis through suppressing translation of the sense gene (ANA/BTG3) [1]. ASBEL forms duplexes with ANA/BTG3 mRNA in the nucleus and suppresses its cytoplasmic transportation, leading to negative regulation of ANA/BTG3 at protein level without changing of its mRNA level [1].

ASBEL also plays a key role in Wnt/β-catenin-mediated tumorigenesis [2]. ASBEL interacts with and recruits transcription factor 3 (TCF3) to the activating transcription factor 3 (ATF3) locus and represses the expression of ATF3, resulting in proliferation and tumorigenicity of colon tumor cells [2].

Regulation

β-catenin is found to directly enhance the transcription of ASBEL [2].

ASBEL represses transcripting of ATF3, and ATF3 functions as a component in the negative feedback loop that inhibits ASBEL expression [2].

Disease

ovarian carcinoma [1]

colorectal cancer [2]

Expression

ASBEL expression is higher in stage I–III colon cancer than in normal tissues [2].

Labs working on this lncRNA

  • Laboratory of Molecular and Genetic Information, Institute of Molecular and Cellular Biosciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032, Japan.[1]
  • Laboratory of Molecular and Genetic Information, Institute of Molecular and Cellular Biosciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-0032, Japan.[2]

References

  1. 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Yanagida S, Taniue K, Sugimasa H, Nasu E, Takeda Y, Kobayashi M, Yamamoto T, Okamoto A, Akiyama T. ASBEL, an ANA/BTG3 antisense transcript required for tumorigenicity of ovarian carcinoma. Sci Rep. 2013;3:1305.
  2. 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Taniue K, Kurimoto A, Takeda Y, Nagashima T, Okada-Hatakeyama M, Katou Y, Shirahige K, Akiyama T. ASBEL-TCF3 complex is required for the tumorigenicity of colorectal cancer cells. Proc Natl Acad Sci U S A. 2016 Oct 21.
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