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The human testis determining factor SRY binds a nuclear factor containing PDZ protein interaction domains
F Poulat1, P de Santa Barbara, M Desclozeaux
1Centre de Recherches de Biochimie Macromoléculaire, ERS155 CNRS, INSERM U.249, route de Mende, BP 5051, 34033 Montpellier Cedex, France.
The Journal of Biological Chemistry
|March 14, 1997
Summary
Scientists discovered a new protein interaction involving the human testis-determining gene SRY. This finding reveals a potential mechanism for SRY
Area of Science:
- Genetics
- Molecular Biology
- Developmental Biology
Background:
- The SRY gene is crucial for male sex determination.
- The function of SRY protein regions outside its DNA-binding domain is largely unknown.
Purpose of the Study:
- To identify proteins interacting with human SRY.
- To elucidate the functional significance of SRY interactions.
Main Methods:
- Yeast two-hybrid screening
- In vitro biochemical analysis
- Immunoprecipitation
- Expression analysis in human embryonic testis
Main Results:
- A PDZ protein, SIP-1, was identified as an interacting partner of human SRY.
- The interaction was confirmed through multiple experimental approaches.
- Interaction domains were mapped to the C-terminus of SRY and PDZ domains of SIP-1.
Conclusions:
- SIP-1 interacts with the SRY protein.
- This interaction may provide SRY with a missing trans-regulation domain, potentially linking it to other transcription factors.
- SIP-1 may play a role in SRY-mediated male sex determination.