Structure and Evolution of 4-Coumarate:Coenzyme A Ligase (4CL) Gene Families
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Daniela Cukovica
Abstract
The phenylpropanoid enzyme 4-coumarate:coenzyme A ligase (4CL) plays a key role in general phenylpropanoid metabolism. 4CL is related to a larger class of prokaryotic and eukaryotic adenylateforming enzymes and shares several conserved peptide motifs with these enzymes. In order to better characterize the nature of 4CL gene families in poplar, parsley, and tobacco, we used degenerate primers to amplify 4CL sequences from these species. In each species additional, divergent 4CL genes were found. Complete cDNA clones for the two new poplar 4CL genes were obtained, allowing examination of their expression patterns and determination of the substrate utilization profile of a xylemspecific isoform. Phylogenetic analysis of these genes and gene fragments confirmed previous results showing that 4CL proteins fall into two evolutionarily ancient subgroups . A comparative phylogenetic analysis of enzymes in the adenylate forming superfamily showed that 4CLs, luciferases, and acetate CoA ligases each form distinct clades within the superfamily. According to this analysis, four Arabidopsis 4CLlike genes identified from the Arabidopsis Genome Project are only distantly related to bona fide 4CLs or are more closely related to fatty acid CoA ligases, suggesting that the three Arabidopsis 4CL genes previously characterized represent the extent of the 4CL gene family in this species.
Copyright © 2001 by Walter de Gruyter GmbH & Co. KG
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Articles in the same Issue
- Vaccine Development: from Empirical Medicine to Molecularly Designed Therapy
- Dendritic Cells for Specific Cancer Immunotherapy
- Intracellular Bacteria as Targets and Carriers for Vaccination
- Bacteria-Mediated Transfer of Eukaryotic Expression Plasmids into Mammalian Host Cells
- Revealing the Potential of DNA-Based Vaccination: Lessons Learned from the Hepatitis B Virus Surface Antigen
- Progress toward a Malaria Vaccine: Efficient Induction of Protective Anti-Malaria Immunity
- Peptide Vaccines and Peptide Libraries
- Defined Synthetic Vaccines
- Antimicrobial Peptides: Properties and Applicability
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- The Role of Heat Shock Proteins and Their Receptors in the Activation of the Immune System
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- Structure and Evolution of 4-Coumarate:Coenzyme A Ligase (4CL) Gene Families
- Inhibition of Hepatitis B Virus by Hammerhead Ribozyme Targeted to the Poly(A) Signal Sequence in Cultured Cells
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- The Cytosine N4-Methyltransferase M.PvuII Also Modifies Adenine Residues
- Expression of the Human Menkes ATPase in Xenopus laevis Oocytes
