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Affinity maturation generates greatly improved xyloglucan-specific carbohydrate binding modules.

Laura von Schantz1, Fredrika Gullfot, Sebastian Scheer

  • 1Dept of Immunotechnology, Lund University, Lund, Sweden. laura.von_schantz@immun.lth.se

BMC Biotechnology
|November 3, 2009
PubMed
Summary
This summary is machine-generated.

Researchers improved carbohydrate-binding modules (CBM) using random mutagenesis and phage display. This generated highly specific molecular probes for detecting plant carbohydrates like xyloglucan with enhanced affinity.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Plant Science

Background:

  • Carbohydrate-binding modules (CBM) are engineered as glycan-specific molecular probes.
  • Affinity maturation of CBM had not been previously investigated.

Purpose of the Study:

  • To investigate the possibility of affinity maturation on CBM.
  • To generate improved CBM with enhanced binding characteristics for plant carbohydrates.

Main Methods:

  • Utilized random mutagenesis and phage display technology.
  • Applied these methods to CBM derived from the CBM4-2 scaffold.

Main Results:

  • Generated two modified proteins with significantly improved affinity for xyloglucan.
  • These evolved binders target galactose-decorated xyloglucan subunits and outperform the original CBM.
  • Demonstrated specificity by distinguishing fucosylated from non-fucosylated xyloglucan in plant sections.

Conclusions:

  • Affinity maturation of CBM from the CBM4-2 scaffold is feasible.
  • This approach can yield novel analytical tools for plant carbohydrate detection.