Functional and structural properties of a novel cellulosome-like multienzyme complex: efficient glycoside hydrolysis of water-insoluble 7-xylosyl-10-deacetylpaclitaxel

Sci Rep. 2015 Sep 8:5:13768. doi: 10.1038/srep13768.

Abstract

Cellulosome is a kind of multienzyme complex that displays high activity, selectivity, and stability. Here, we report a novel, non-cellulolytic, cellulosome-like multienzyme complex that produced by the Cellulosimicrobium cellulans wild-type strain F16 isolated from soil microflora. This multienzyme complex, with excellent catalytic efficiency of kcat 13.2 s(-1) to remove the C-7 xylosyl group from 7-xylosyl-10-deacetylpaclitaxel (10-DAXP), has an outstanding tolerance against organic solvents and an excellent general stability, with the long half-life of 214 hours. This cellulosome-like multienzyme complex has a novel structure distinct from the well-documented ones. The key catalytic subunit responsible for the β-xylosidase activity against 10-DAXP is identified to be a novel protein, indicating a new glycoside hydrolase (GH) family. The pioneering work described here offers a novel nanoscale biocatalyst for the production of biofuels and chemicals from renewable plant-based natural resources.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acid Sequence
  • Catalysis
  • Cellulosomes / metabolism*
  • Enzyme Activation
  • Enzyme Stability
  • Genome, Bacterial
  • Genomics
  • Glycosides / metabolism
  • High-Throughput Nucleotide Sequencing
  • Hydrolysis
  • Kinetics
  • Molecular Sequence Data
  • Multienzyme Complexes / chemistry*
  • Multienzyme Complexes / genetics
  • Multienzyme Complexes / isolation & purification
  • Multienzyme Complexes / metabolism*
  • Paclitaxel / analogs & derivatives
  • Paclitaxel / metabolism
  • Protein Structure, Secondary
  • Protein Subunits
  • Sequence Alignment
  • Structure-Activity Relationship
  • Substrate Specificity

Substances

  • 7-xylosyl-10-deacetylpaclitaxel
  • Glycosides
  • Multienzyme Complexes
  • Protein Subunits
  • Paclitaxel