Transcription activating property of autoantigen SG2NA and modulating effect of WD-40 repeats.
Transcription activating property of autoantigen SG2NA and modulating effect of WD-40 repeats.
复制标题
自身抗原 SG2NA 的转录激活特性和 WD-40 重复序列的调节作用。
DOI:
10.1006/excr.2001.5320
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发表时间:
2001
期刊:
影响因子:
--
通讯作者:
Tan,EM
中科院分区:
文献类型:
--
作者:
Zhu,W;Chan,EK;Li,J;Hemmerich,P;Tan,EM
Autoantibodies to intracellular proteins have been detected in sera of patients with various forms of cancer. Nuclear autoantigen SG2NA (S, G2 phase nuclear antigen) was isolated using autoantibodies from a patient with bladder and lung cancers and its expression is enhanced in the S and G2 phases of the cell cycle. Molecular cloning revealed that the C-terminal region of SG2NA contains six WD-40 repeats, motifs that are present in a large family of proteins with diverse functions. We show that the N-terminal region of SG2NA (aa 1–391) acted as a strong transcriptional activator in both yeast and mammalian cells. In contrast, the C-terminal WD-40 repeats had an inhibitory effect on transcription activation. We performed molecular swapping experiments by substituting the WD-40 repeats of SG2NA with those of yeast Met30 and Cdc4 and showed that the WD-40 regions from either Met30 or Cdc4 were capable of reproducing transcription repression function. The SG2NA WD-40 repeats were also able to repress basal level transcription and transactivation function of a GAL4–VP16 chimera. These observations suggest that some WD-40 repeats may have, as one of their functions, a negative regulatory role in the biological activities of their own and perhaps other proteins.
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影响因子:
3.7
作者:
Sadaie,MR;Mathews,MB
通讯作者:
Mathews,MB
DOI:
10.1002/j.1460-2075.1995.tb00104.x
发表时间:
1995
期刊:
The EMBO Journal
影响因子:
--
作者:
T. Gutjahr;Erich Frei;C. Spicer;Stefan Baumgartner;R. A. White;Markus Noll
通讯作者:
Markus Noll
影响因子:
3.7
作者:
Vogt,PK;Li,J;Freyaldenhoven,BS
通讯作者:
Freyaldenhoven,BS
影响因子:
3.3
作者:
DeSilva,H;Lee,K;Osley,MA
通讯作者:
Osley,MA
DOI:
10.1006/bbrc.1995.1288
发表时间:
1995-02-27
影响因子:
3.1
作者:
MURO, Y;CHAN, EKL;TAN, EM
通讯作者:
TAN, EM