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Published on: April 22, 2011

Human TMEM174 that is highly expressed in kidney tissue activates AP-1 and promotes cell proliferation

Pingzhang Wang1, Bo Sun, Dongxia Hao

  • 1Chinese National Human Genome Center, #3-707 North YongChang Road BDA, Beijing 100191, PR China.

Biochemical and Biophysical Research Communications
|March 25, 2010
PubMed

Insights

A novel protein, TMEM174, enhances activator protein-1 (AP-1) activity and cell proliferation, particularly in kidney tissue. Its transmembrane regions are crucial for these functions, suggesting a role in renal physiology.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Renal Physiology

Background:

  • Mitogen-activated protein kinase (MAPK) cascades regulate activator protein-1 (AP-1) activity via substrate phosphorylation.
  • Understanding novel regulators of AP-1 is crucial for cellular function.

Purpose of the Study:

  • To identify and characterize a novel protein, TMEM174, and elucidate its role in AP-1 regulation and cell proliferation.
  • To investigate the functional significance of TMEM174's transmembrane domains.

Main Methods:

  • Identification of TMEM174 through RNA transcript expression analysis in human kidney tissue.
  • Over-expression studies of wild-type TMEM174 and a truncated mutant (TMEM174DeltaTM).
  • Assessment of AP-1 transcriptional activity and cell proliferation rates.

Main Results:

  • TMEM174 RNA transcripts are highly expressed in human kidney.
  • Over-expression of TMEM174 enhanced AP-1 transcriptional activity and promoted cell proliferation.
  • TMEM174's transmembrane regions are essential for its function, as the TMEM174DeltaTM mutant lacked these effects.

Conclusions:

  • TMEM174 is a novel transmembrane protein influencing AP-1 activity and cell proliferation.
  • The transmembrane helices of TMEM174 are critical for its biological functions.
  • TMEM174 may play a significant role in renal development and physiological processes.

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