The Substrate Specificity of Exonuclease A5

The substrate specificity of fumarase.

The substrate specificity of fumarase has been studied by measuring the ability of the enzyme to hydrate or dehydrate derivatives of fumarate and L-malate. Fumarase was observed to hydrate fumarate and its derivatives in the order, fluorofumarate > fumarate > chlorofumarate > bromofumarate > acetylenedicarboxylate > iodofumarate > mesaconate. With the exception of fluorofumarate, water was adde...

The Role of Highly Conserved Tryptophan in the Sixth Conserved Region at Substrate Specificity of α- amylase

Early in this study, an α-Amylase from Bacillus megaterium WHO (BMW) was isolated from hot springs of Ramsar (North of Iran), and its gene was cloned in E.coli. Based on its conserved sequence regions and substrate specificity, it was classified as intermediary group enzymes with the specificity of oligo-1,6-glucosidase and neopullulanase subfamilies. In the sixth conserved re...

Substrate Specificity of MMPs

3'-->5' exonuclease in Drosophila mitochondrial DNA polymerase. Substrate specificity and functional coordination of nucleotide polymerization and mispair hydrolysis.

A mispair-specific 3'-->5' exonuclease copurifies quantitatively with the near-homogeneous Drosophila gamma polymerase (Kaguni, L.S., and Olson, M.W. (1989) Proc. Natl. Acad. Sci. U.S.A. 86, 6469-6473). The exonuclease and polymerase exhibit similar reaction requirements and optima, suggesting functional coordination of their activities. Under nonpolymerization conditions, the 3'-->5' exonuclea...

Glutamyl Endopeptidases: The Puzzle of Substrate Specificity

Glutamyl endopeptidases (GEPases) are chymotrypsin-like enzymes that preferentially cleave the peptide bonds of the α-carboxyl groups of glutamic acid. Despite the many years of research, the structural determinants underlying the strong substrate specificity of GEPases still remain unclear. In this review, data concerning the molecular mechanisms that determine the substrate preference of GEPa...