Structural and Functional Bis(dithiolene)-Molybdenum/Tungsten Active Site Analogues of the Dimethylsulfoxide Reductase Enzyme Family

2000 ◽  
Vol 122 (30) ◽  
pp. 7410-7411 ◽  
Author(s):  
Booyong S. Lim ◽  
Kie-Moon Sung ◽  
R. H. Holm
Keyword(s):  
Active Site ◽  
Enzyme Family ◽  
Dimethylsulfoxide Reductase

Dimethylsulfoxide reductase: an enzyme capable of catalysis with either molybdenum or tungsten at the active site 1 1Edited by P. E. Wright

2000 ◽  
Vol 299 (3) ◽  
pp. 593-600 ◽  
Author(s):  
Lisa J Stewart ◽  
Susan Bailey ◽  
Brian Bennett ◽  
John M Charnock ◽  
C.David Garner ◽  
...  
Keyword(s):  
Active Site ◽  
Dimethylsulfoxide Reductase

Monodithiolene Molybdenum(V,VI) Complexes:  A Structural Analogue of the Oxidized Active Site of the Sulfite Oxidase Enzyme Family

2001 ◽  
Vol 123 (34) ◽  
pp. 8343-8349 ◽  
Author(s):  
Booyong S. Lim ◽  
Michael W. Willer ◽  
Mingming Miao ◽  
R. H. Holm
Keyword(s):  
Active Site ◽  
Sulfite Oxidase ◽  
Structural Analogue ◽  
Enzyme Family ◽  
Oxidase Enzyme

scholarly journals An Essential Role in Molting and Morphogenesis ofCaenorhabditis elegansfor ACN-1, a Novel Member of the Angiotensin-converting Enzyme Family That Lacks a Metallopeptidase Active Site

2003 ◽  
Vol 278 (52) ◽  
pp. 52340-52346 ◽  
Author(s):  
Darren R. Brooks ◽  
Peter J. Appleford ◽  
Lindsay Murray ◽  
R. Elwyn Isaac
Keyword(s):  
Angiotensin Converting Enzyme ◽  
Active Site ◽  
Essential Role ◽  
Converting Enzyme ◽  
Enzyme Family

Spectroscopic and Electronic Structure Studies of Symmetrized Models for Reduced Members of the Dimethylsulfoxide Reductase Enzyme Family

2008 ◽  
Vol 130 (14) ◽  
pp. 4628-4636 ◽  
Author(s):  
Rebecca L. McNaughton ◽  
Booyong S. Lim ◽  
Sushilla Z. Knottenbelt ◽  
Richard. H. Holm ◽  
Martin L. Kirk
Keyword(s):  
Electronic Structure ◽  
Enzyme Family ◽  
Dimethylsulfoxide Reductase

Inhibitory effects of anions and active site amino acid sequence of chicken liver L-2-hydroxyacid oxidase A, a member of the FMN-dependent α-hydroxyacid oxidizing enzyme family

Biochimie ◽  
1998 ◽  
Vol 80 (12) ◽  
pp. 1047-1054 ◽  
Author(s):  
Anne Ferjancic-Biagini ◽  
Liliane Dupuis ◽  
Josiane De Caro ◽  
Antoine Puigserver
Keyword(s):  
Amino Acid ◽  
Amino Acid Sequence ◽  
Active Site ◽  
Chicken Liver ◽  
Inhibitory Effects ◽  
Enzyme Family

Locating Al in the DABCO catalyst before and after Al extraction

1990 ◽  
Vol 48 (4) ◽  
pp. 265-267
Author(s):  
Kathleen B. Reuter
Keyword(s):  
Active Site ◽  
Inverse Relationship ◽  
Transverse Direction ◽  
Reaction Rate ◽  
Acid Phosphate ◽  
Fracture Surfaces ◽  
Al Content ◽  
Before And After ◽  
Relationship Of

The reaction rate and efficiency of piperazine to 1,4-diazabicyclo-octane (DABCO) depends on the Si/Al ratio of the MFI topology catalysts. The Al was shown to be the active site, however, in the Si/Al range of 30-200 the reaction rate increases as the Si/Al ratio increases. The objective of this work was to determine the location and concentration of Al to explain this inverse relationship of Al content with reaction rate.Two silicalite catalysts in the form of 1/16 inch SiO2/Al2O3 bonded extrudates were examined: catalyst A with a Si/Al of 83; and catalyst B, the acid/phosphate Al extracted form of catalyst A, with a Si/Al of 175. Five extrudates from each catalyst were fractured in the transverse direction and particles were obtained from the fracture surfaces near the center of the extrudate diameter. Particles were also obtained from the outside surfaces of five extrudates.

Structures of c-di-GMP/cGAMP degrading phosphodiesterase VcEAL: identification of a novel conformational switch and its implication

2019 ◽  
Vol 476 (21) ◽  
pp. 3333-3353 ◽  
Author(s):  
Malti Yadav ◽  
Kamalendu Pal ◽  
Udayaditya Sen
Keyword(s):  
Active Site ◽  
Metal Binding ◽  
Metal Ion ◽  
Triosephosphate Isomerase ◽  
Catalytic Mechanism ◽  
Degradation Mechanism ◽  
Structural Basis ◽  
Conserved Residues ◽  
Phosphodiester Bond ◽  
Cyclic Dinucleotides

Cyclic dinucleotides (CDNs) have emerged as the central molecules that aid bacteria to adapt and thrive in changing environmental conditions. Therefore, tight regulation of intracellular CDN concentration by counteracting the action of dinucleotide cyclases and phosphodiesterases (PDEs) is critical. Here, we demonstrate that a putative stand-alone EAL domain PDE from Vibrio cholerae (VcEAL) is capable to degrade both the second messenger c-di-GMP and hybrid 3′3′-cyclic GMP–AMP (cGAMP). To unveil their degradation mechanism, we have determined high-resolution crystal structures of VcEAL with Ca2+, c-di-GMP-Ca2+, 5′-pGpG-Ca2+ and cGAMP-Ca2+, the latter provides the first structural basis of cGAMP hydrolysis. Structural studies reveal a typical triosephosphate isomerase barrel-fold with substrate c-di-GMP/cGAMP bound in an extended conformation. Highly conserved residues specifically bind the guanine base of c-di-GMP/cGAMP in the G2 site while the semi-conserved nature of residues at the G1 site could act as a specificity determinant. Two metal ions, co-ordinated with six stubbornly conserved residues and two non-bridging scissile phosphate oxygens of c-di-GMP/cGAMP, activate a water molecule for an in-line attack on the phosphodiester bond, supporting two-metal ion-based catalytic mechanism. PDE activity and biofilm assays of several prudently designed mutants collectively demonstrate that VcEAL active site is charge and size optimized. Intriguingly, in VcEAL-5′-pGpG-Ca2+ structure, β5–α5 loop adopts a novel conformation that along with conserved E131 creates a new metal-binding site. This novel conformation along with several subtle changes in the active site designate VcEAL-5′-pGpG-Ca2+ structure quite different from other 5′-pGpG bound structures reported earlier.

Contributions of the substrate-binding arginine residues to maleate-induced closure of the active site of Escherichia coli aspartate aminotransferase

2001 ◽  
Vol 268 (6) ◽  
pp. 1640-1645
Author(s):  
Annelise Matharu ◽  
Hideyuki Hayashi ◽  
Hiroyuki Kagamiyama ◽  
Bruno Maras ◽  
Robert A. John
Keyword(s):  
Escherichia Coli ◽  
Active Site ◽  
Aspartate Aminotransferase ◽  
Substrate Binding ◽  
Arginine Residues
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