Format

Send to:

Choose Destination
See comment in PubMed Commons below
BMC Plant Biol. 2006 Dec 20;6:30.

Protease gene families in Populus and Arabidopsis.

Author information

  • 1Umeå Plant Science Centre, Department of Biochemistry, Umeå University, S - 90187 Umeå, Sweden. maribel.garcia@chem.umu.se <maribel.garcia@chem.umu.se>

Abstract

BACKGROUND:

Proteases play key roles in plants, maintaining strict protein quality control and degrading specific sets of proteins in response to diverse environmental and developmental stimuli. Similarities and differences between the proteases expressed in different species may give valuable insights into their physiological roles and evolution.

RESULTS:

We have performed a comparative analysis of protease genes in the two sequenced dicot genomes, Arabidopsis thaliana and Populus trichocarpa by using genes coding for proteases in the MEROPS database 1 for Arabidopsis to identify homologous sequences in Populus. A multigene-based phylogenetic analysis was performed. Most protease families were found to be larger in Populus than in Arabidopsis, reflecting recent genome duplication. Detailed studies on e.g. the DegP, Clp, FtsH, Lon, rhomboid and papain-Like protease families showed the pattern of gene family expansion and gene loss was complex. We finally show that different Populus tissues express unique suites of protease genes and that the mRNA levels of different classes of proteases change along a developmental gradient.

CONCLUSION:

Recent gene family expansion and contractions have made the Arabidopsis and Populus complements of proteases different and this, together with expression patterns, gives indications about the roles of the individual gene products or groups of proteases.

PMID:
17181860
[PubMed - indexed for MEDLINE]
PMCID:
PMC1780054
Free PMC Article
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for BioMed Central Icon for PubMed Central
    Loading ...
    Write to the Help Desk