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Updated: Aug 13, 2026
07:38
Measuring In Vitro ATPase Activity for Enzymatic Characterization
Published on: August 23, 2016
The evolution of ATPase activity in SMC proteins
Neville Cobbe1, Margarete M S Heck
1Wellcome Trust Centre for Cell Biology, University of Edinburgh, Michael Swann Building, King's Buildings, Edinburgh, United Kingdom. Neville.Cobbe@ed.ac.uk
Proteins
|January 27, 2006
Summary
Structural maintenance of chromosomes (SMC) proteins are vital for heredity. This study reveals varying ATP hydrolysis requirements for SMC proteins, like cohesin and condensin, impacting their function.
Area of Science:
- Molecular Biology
- Genetics
- Biochemistry
Background:
- Structural maintenance of chromosomes (SMC) proteins are conserved ATPases essential for hereditary material transmission.
- The precise role of ATP hydrolysis in SMC protein function remains debated.
Purpose of the Study:
- To investigate the functional significance of ATP binding and hydrolysis in eukaryotic SMC proteins.
- To compare ATPase activity requirements across different SMC protein families, including cohesin and condensin.
Main Methods:
- Comparative analysis of conserved ATPase motifs within SMC proteins.
- Exploration of potential coevolution between associated protein domains.
- Investigation of interactions between SMC and non-SMC components of the condensin complex.
Main Results:
- Identified a reduced requirement for ATPase activity in cohesin's SMC3 protein.
- Demonstrated greater conservation requirements for ATPase activity in condensin SMC proteins.
- Uncovered potential modulatory roles of non-SMC components on condensin ATPase activity.
Conclusions:
- ATP binding and hydrolysis requirements vary significantly among eukaryotic SMC proteins.
- Cohesin and condensin exhibit distinct dependencies on ATPase activity for their functions.
- Interactions with non-SMC factors are crucial for full condensin activity and ATPase modulation.
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