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A recruited protease is involved in catabolism of pyrimidines.

Andersen, Birgit LU ; Lundgren, Stina; Dobritzsch, Doreen and Piskur, Jure LU (2008) In Journal of Molecular Biology 379(2). p.243-250
Abstract
In nature, the same biochemical reaction can be catalyzed by enzymes having fundamentally different folds, reaction mechanisms and origins. For example, the third step of the reductive catabolism of pyrimidines, the conversion of N-carbamyl-beta-alanine to beta-alanine, is catalyzed by two beta-alanine synthase (beta ASase, EC 3.5.1.6) subfamilies. We show that the "prototype" eukaryote beta ASases, such as those from Drosophila melanogaster and Arabidopsis thaliana, are relatively efficient in the conversion of N-carbamyl-beta A compared with a representative of fungal beta ASases, the yeast Saccharomyces kluyveri beta ASase, which has a high K(m) value (71 mM). S. kluyveri beta ASase is specifically inhibited by dipeptides and... (More)
In nature, the same biochemical reaction can be catalyzed by enzymes having fundamentally different folds, reaction mechanisms and origins. For example, the third step of the reductive catabolism of pyrimidines, the conversion of N-carbamyl-beta-alanine to beta-alanine, is catalyzed by two beta-alanine synthase (beta ASase, EC 3.5.1.6) subfamilies. We show that the "prototype" eukaryote beta ASases, such as those from Drosophila melanogaster and Arabidopsis thaliana, are relatively efficient in the conversion of N-carbamyl-beta A compared with a representative of fungal beta ASases, the yeast Saccharomyces kluyveri beta ASase, which has a high K(m) value (71 mM). S. kluyveri beta ASase is specifically inhibited by dipeptides and tripeptides, and the apparent K(i) value of glycyl-glycine is in the same range as the substrate K(m). We show that this inhibitor binds to the enzyme active center in a similar way as the substrate. The observed structural similarities and inhibition behavior, as well as the phylogenetic relationship, suggest that the ancestor of the fungal beta ASase was a protease that had modified its profession and become involved in the metabolism of nucleic acid precursors. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
nucleic acid precursors, β-alanine synthase, protease, structure– function relationship, protein evolution
in
Journal of Molecular Biology
volume
379
issue
2
pages
243 - 250
publisher
Elsevier
external identifiers
  • wos:000256328300004
  • scopus:43049092581
ISSN
1089-8638
DOI
10.1016/j.jmb.2008.03.073
language
English
LU publication?
yes
id
ed766a3e-09f7-42fa-8945-95c6344c60b7 (old id 1154636)
date added to LUP
2008-10-22 15:18:58
date last changed
2017-01-01 06:05:32
@article{ed766a3e-09f7-42fa-8945-95c6344c60b7,
  abstract     = {In nature, the same biochemical reaction can be catalyzed by enzymes having fundamentally different folds, reaction mechanisms and origins. For example, the third step of the reductive catabolism of pyrimidines, the conversion of N-carbamyl-beta-alanine to beta-alanine, is catalyzed by two beta-alanine synthase (beta ASase, EC 3.5.1.6) subfamilies. We show that the "prototype" eukaryote beta ASases, such as those from Drosophila melanogaster and Arabidopsis thaliana, are relatively efficient in the conversion of N-carbamyl-beta A compared with a representative of fungal beta ASases, the yeast Saccharomyces kluyveri beta ASase, which has a high K(m) value (71 mM). S. kluyveri beta ASase is specifically inhibited by dipeptides and tripeptides, and the apparent K(i) value of glycyl-glycine is in the same range as the substrate K(m). We show that this inhibitor binds to the enzyme active center in a similar way as the substrate. The observed structural similarities and inhibition behavior, as well as the phylogenetic relationship, suggest that the ancestor of the fungal beta ASase was a protease that had modified its profession and become involved in the metabolism of nucleic acid precursors.},
  author       = {Andersen, Birgit and Lundgren, Stina and Dobritzsch, Doreen and Piskur, Jure},
  issn         = {1089-8638},
  keyword      = {nucleic acid precursors,β-alanine synthase,protease,structure–
function relationship,protein evolution},
  language     = {eng},
  number       = {2},
  pages        = {243--250},
  publisher    = {Elsevier},
  series       = {Journal of Molecular Biology},
  title        = {A recruited protease is involved in catabolism of pyrimidines.},
  url          = {http://dx.doi.org/10.1016/j.jmb.2008.03.073},
  volume       = {379},
  year         = {2008},
}