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Crystal structure of Rnd3/RhoE: functional implications
Dennis Fiegen1, Lars Blumenstein, Patricia Stege
1Max-Planck-Institut für molekulare Physiologie, Abteilung Strukturelle Biologie, Otto-Hahn-Strasse 11, 44227, Dortmund, Germany.
FEBS Letters
|August 7, 2002
Summary
The Rnd3/RhoE GTPase structure reveals unique features compared to RhoA, including differences in its GTPase center and interaction sites. This provides new insights into the Rnd protein subfamily.
Area of Science:
- Molecular Biology
- Structural Biology
- Biochemistry
Background:
- Rnd proteins are an unusual subfamily of Rho GTPases.
- They are characterized by extended termini and GTPase-deficiency mutations.
Purpose of the Study:
- To determine the crystal structure of the Rnd3/RhoE G-domain.
- To elucidate the structural basis for Rnd protein's unique properties and GTPase deficiency.
Main Methods:
- X-ray crystallography was used to determine the structure.
- The Rnd3/RhoE G-domain (amino acids 19-200) was crystallized at 2.0 A resolution.
Main Results:
- The crystal structure of Rnd3/RhoE G-domain was obtained.
- Key differences were identified compared to RhoA, including the GTPase center, surface charge distribution, C3-transferase binding site, and interaction interfaces.
Conclusions:
- This is the first GTP-bound structure of a Rho family member with significant deviations from RhoA.
- The findings highlight the unique structural characteristics of Rnd proteins and their distinct interactions with regulators and effectors.