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Compatibility of detergents with the microbatch-under-oil crystallization method.
Patrick J Loll1, Anna Tretiakova, Erik Soderblom
1Department of Biochemistry, Drexel University College of Medicine, Philadelphia, PA 19102-1192, USA. pat.loll@drexel.edu
Summary
Detergents used for protein crystallization show minimal loss into oils during microbatch-under-oil techniques. Gentle mixing, typical in experiments, results in negligible detergent partitioning, ensuring compatibility for membrane protein crystallization.
Area of Science:
- Biochemistry
- Structural Biology
- Crystallography
Background:
- Integral membrane proteins require detergents for solubilization and crystallization.
- The microbatch-under-oil crystallization technique utilizes oils, raising concerns about detergent compatibility.
- Potential partitioning of detergents into the oil phase could affect crystallization outcomes.
Purpose of the Study:
- To investigate the partitioning behavior of detergents into oils used in microbatch crystallization.
- To assess the compatibility of common detergents with the microbatch-under-oil technique.
Main Methods:
- Examined the partitioning of n-octyl-beta-d-glucopyranoside and Fos-Choline-12 into two different oils.
- Utilized microbatch crystallization conditions with varying mixing intensities and incubation times.
Main Results:
- Vigorous mixing and prolonged incubation led to minor detergent losses (approx. 5%).
- Gentle mixing, representative of crystallization experiments, resulted in negligible detergent loss.
- Detergents n-octyl-beta-d-glucopyranoside and Fos-Choline-12 demonstrate compatibility with microbatch-under-oil crystallization.
Conclusions:
- The microbatch-under-oil crystallization technique is compatible with common detergents.
- Minimal detergent partitioning occurs under typical experimental conditions, supporting its use for membrane protein crystallization.