Cited by 14Biochemical and Molecular ResearchEnzyme Structure and FunctionProtein Structure and Dynamics

The DOI matches its Crossref record; 59 of the 60 references it cites were found in a registry or an index.

Central Cavity of Fructose-1,6-bisphosphatase and the Evolution of AMP/Fructose 2,6-bisphosphate Synergism in Eukaryotic Organisms

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Gao, Yang, Shen, Lu, Honzatko, Richard B.·2014·Journal of Biological Chemistry

Abstract

The effects of AMP and fructose 2,6-bisphosphate (Fru-2,6-P2) on porcine fructose-1,6-bisphosphatase (pFBPase) and Escherichia coli FBPase (eFBPase) differ in three respects. AMP/Fru-2,6-P2 synergism in pFBPase is absent in eFBPase. Fru-2,6-P2 induces a 13° subunit pair rotation in pFBPase but no rotation in eFBPase. Hydrophilic side chains in eFBPase occupy what otherwise would be a central aqueous cavity observed in pFBPase. Explored here is the linkage of AMP/Fru-2,6-P2 synergism to the central cavity and the evolution of synergism in FBPases. The single mutation Ser(45) → His substantially fills the central cavity of pFBPase, and the triple mutation Ser(45) → His, Thr(46) → Arg, and Leu(186) → Tyr replaces porcine with E. coli type side chains. Both single and triple mutations significantly reduce synergism while retaining other wild-type kinetic properties. Similar to the effect of Fru-2,6-P2 on eFBPase, the triple mutant of pFBPase with bound Fru-2,6-P2 exhibits only a 2° subunit pair rotation as opposed to the 13° rotation exhibited by the Fru-2,6-P2 complex of wild-type pFBPase. The side chain at position 45 is small in all available eukaryotic FBPases but large and hydrophilic in bacterial FBPases, similar to eFBPase. Sequence information indicates the likelihood of synergism in the FBPase from Leptospira interrogans (lFBPase), and indeed recombinant lFBPase exhibits AMP/Fru-2,6-P2 synergism. Unexpectedly, however, AMP also enhances Fru-6-P binding to lFBPase. Taken together, these observations suggest the evolution of AMP/Fru-2,6-P2 synergism in eukaryotic FBPases from an ancestral FBPase having a central aqueous cavity and exhibiting synergistic feedback inhibition by AMP and Fru-6-P.

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Authors
Gao, Y., Shen, L., & Honzatko, R. B.
Affiliations
Iowa State University (US)
Corresponding author
Honzatko, Richard B.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2014-03
Volume
289
Issue
12
Pages
8450-8461
ISSN
0021-9258 (ISSN-L)
OpenAlex
W1994053210
Cited by
11
References
60
Citations by year
2023: 1 · 2021: 1 · 2020: 2 · 2019: 1 · 2018: 1 · 2017: 1 · 2016: 2 · 2015: 2
FWCI
0.68
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institutes of Health (NS 10546)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Biochemical and Molecular Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Structural Biology › Enzyme Structure and Function
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
Keywords
fructose-1,6-bisphosphatase, central cavity, enzyme evolution, product inhibition, allosteric regulation
MeSH terms
Adenosine Monophosphate, Amino Acid Sequence, Animals, Binding Sites, Fructosediphosphates, Fructose-Bisphosphatase, Kinetics, Models, Molecular, Molecular Sequence Data, Protein Conformation, Swine, Mutagenesis, Site-Directed, Evolution, Molecular

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