What question did this study set out to answer?

The study aims to improve the purification and nucleotide loading process for small GTPases to facilitate structure-function analyses.

May 20, 2026Protein ScienceOpen Access

Use of tandem‐affinity chromatography to incorporate nucleotide loading of small GTPases during their purification

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Randomized trial demonstrates expedited purification and nucleotide loading of small GTPases, suggesting enhanced structural studies.

The study aims to improve the purification and nucleotide loading process for small GTPases to facilitate structure-function analyses.
Developed a tandem-affinity purification protocol using split-intein based technology.
Used K-Ras4B and H-Ras to validate effectiveness of the purification method in generating high-quality proteins.
Achieved crystallizable grade protein loading in under 36 hours.
Generated significant quantities of pure, homogenously loaded small GTPases like K-Ras4B and H-Ras.
Successfully loaded proteins with GDP or the non-hydrolysable GTP analogue GppNHp.
Demonstrated rapid purification process in less than 36 hours.

Oladimeji et al. (2026) studied this question.

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