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Protease gene families in Populus and Arabidopsis
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Kemiska institutionen.
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysiologisk botanik. Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå Plant Science Centre (UPSC).
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysiologisk botanik. Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå Plant Science Centre (UPSC).ORCID-id: 0000-0002-7906-6891
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Kemiska institutionen. Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå Plant Science Centre (UPSC).
2006 (engelsk)Inngår i: BMC Plant Biology, ISSN 1471-2229, E-ISSN 1471-2229, Vol. 6, nr 30, s. 1-24Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

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.

sted, utgiver, år, opplag, sider
2006. Vol. 6, nr 30, s. 1-24
Identifikatorer
URN: urn:nbn:se:umu:diva-10870DOI: doi:10.1186/1471-2229-6-30PubMedID: 17181860OAI: oai:DiVA.org:umu-10870DiVA, id: diva2:150541
Tilgjengelig fra: 2008-04-03 Laget: 2008-04-03 Sist oppdatert: 2018-06-09bibliografisk kontrollert
Inngår i avhandling
1. The Role of Proteases in Plant Development
Åpne denne publikasjonen i ny fane eller vindu >>The Role of Proteases in Plant Development
2007 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

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.

Systematic comparative analysis of the available sequenced genomes of two model organisms led to the identification of an increasing number of protease genes, giving insights about protein sequences that are conserved in the different species, and thus are likely to have common functions in them and the acquisition of new genes, elucidate issues concerning non-functionalization, neofunctionalization and subfunctionalization.

The involvement of proteases in senescence and PCD was investigated. While PCD in woody tissues shows the importance of vacuole proteases in the process, the senescence in leaves demonstrate to be a slower and more ordered mechanism starting in the chloroplast where the proteases there localized become important.

The light-harvesting complex of Photosystem II is very susceptible to protease attack during leaf senescence. We were able to show that a metallo-protease belonging to the FtsH family is involved on the process in vitro. Arabidopsis knockout mutants confirmed the function of FtsH6 in vivo.

sted, utgiver, år, opplag, sider
Umeå: Kemi, 2007. s. 45
Emneord
Comparative genomics, protease, PCD, leaf senescence, FtsH, Arabidopsis, Populus
HSV kategori
Identifikatorer
urn:nbn:se:umu:diva-1386 (URN)978-91-7264-422-9 (ISBN)
Disputas
2007-10-26, KB3B1, KBC-huset, Linnaeus V. 6, Umeå, 13:00 (engelsk)
Opponent
Veileder
Tilgjengelig fra: 2007-10-05 Laget: 2007-10-05 Sist oppdatert: 2009-09-08bibliografisk kontrollert

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