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Human spot 14 protein interacts physically and functionally with the thyroid receptor.

Wei-Yuan Chou¹, Yi-Shan Cheng, Ching-Liang Ho

¹Department of Biochemistry, National Defense Medical Center, Taipei 114, Taiwan, ROC.

Biochemical and Biophysical Research Communications

|April 10, 2007

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Spot 14 (S14) protein may form homodimers and interact with the thyroid hormone receptor (TR). This interaction suggests S14 acts as a cofactor in TR-mediated gene regulation, potentially impacting lipogenesis in cancer.

Area of Science:

Biochemistry
Molecular Biology
Cancer Research

Background:

Spot 14 (S14) is an acidic protein with unknown function.
Human S14 (hS14) is found in the nucleus and amplified in some cancers, suggesting a role in tumorigenesis.
hS14 may regulate lipogenic enzymes.

Purpose of the Study:

To elucidate the biochemical function and interactions of human S14 (hS14).
To investigate the potential role of hS14 in cancer and gene regulation.

Main Methods:

Purification of untagged hS14 protein.
Analytical ultracentrifugation to assess protein dimerization.
Biochemical assays to identify interactions with thyroid hormone receptor (TR).

Main Results:

Related Experiment Videos

hS14 was purified and shown to potentially form homodimers.
Evidence suggests physical and functional interactions between hS14 and TR.
hS14 exhibits cell-type-dependent functions, acting as a cofactor for TR.

Conclusions:

hS14 may function as a cofactor for the thyroid hormone receptor (TR).
hS14 regulates malic enzyme gene expression in a TR-dependent manner.
These findings provide a molecular basis for hS14's role in TR-mediated gene transcription.