U.S. Department of Energy Office of Biological and Environmental Research

BER Research Highlights

Thousands of Proteins from Developing Xylem Cells in Poplar Are Identified
Published: July 29, 2010
Posted: October 01, 2010

Woody biomass in trees primarily consists of the secondary cell walls of dead xylem tissue, so developing xylem cells are useful models for investigating secondary cell-wall formation. To provide subcellular context for identified protein functions and to enhance the detection of low-abundance proteins, subcellular fractionation techniques were used to obtain crude (soluble protein), pellet (insoluble protein), and nuclear protein fractions for analysis. Applying an automated approach known as MudPIT (Multidimensional Protein Identification Technology), BESC researchers successfully isolated and identified 6,000 different proteins from developing xylem cells in the stems of poplar plants. Results from this project greatly expanded the number of proteins that had been identified in previous poplar proteome studies. The protein products of several cell-wall synthesis genes (e.g., cellulose synthase, sucrose synthase, and polygalacturonase) were found to be associated with cellular membranes, and numerous new candidate genes for cell-wall synthesis were discovered - many are promising targets for further functional genomic analysis. Measuring differences in the whole proteomes of different poplar variations will increase understanding of the fundamental properties that underlie the recalcitrance of woody biomass to degradation.

Reference: This research was reported in Kalluri, U. C., et al. 2009. "Shotgun Proteome Profile of Populus Developing Xylem," Proteomics 9, 4871-80.

Contact: John Houghton, SC-23.2, (301) 903-8288
Topic Areas:

  • Research Area: Genomic Analysis and Systems Biology
  • Research Area: Plant Systems and Feedstocks, Plant-Microbe Interactions
  • Research Area: Sustainable Biofuels and Bioproducts
  • Research Area: DOE Bioenergy Research Centers (BRC)
  • Research Area: Research Technologies and Methodologies

Division: SC-23.2 Biological Systems Science Division, BER


BER supports basic research and scientific user facilities to advance DOE missions in energy and environment. More about BER

Recent Highlights

May 10, 2019
Quantifying Decision Uncertainty in Water Management via a Coupled Agent-Based Model
Considering risk perception can improve the representation of human decision-making processes in age [more...]

May 09, 2019
Projecting Global Urban Area Growth Through 2100 Based on Historical Time Series Data and Future Scenarios
Study provides country-specific urban area growth models and the first dataset on country-level urba [more...]

May 05, 2019
Calibrating Building Energy Demand Models to Refine Long-Term Energy Planning
A new, flexible calibration approach improved model accuracy in capturing year-to-year changes in bu [more...]

May 03, 2019
Calibration and Uncertainty Analysis of Demeter for Better Downscaling of Global Land Use and Land Cover Projections
Researchers improved the Demeter model’s performance by calibrating key parameters and establi [more...]

Apr 22, 2019
Representation of U.S. Warm Temperature Extremes in Global Climate Model Ensembles
Representation of warm temperature events varies considerably among global climate models, which has [more...]

List all highlights (possible long download time)