Results 71 to 80 of about 10,749 (205)

Extending Cofactor‐Tethered Nanomachines to Complex Multienzyme Redox Cascades in Continuous Flow

ChemSusChem, Volume 19, Issue 15, 14 August 2026.
Engineered enzyme fusions bearing covalently tethered PEG–nicotinamide cofactors enable intramolecular cofactor retention and recycling within self‐sufficient biocatalytic nanomachines. These nanomachines support cofactor‐autonomous operation of complex redox multienzyme cascades under continuous‐flow conditions, as demonstrated in a 10‐step glucose‐to‐
Zinnia Dsouza, Jan‐Simon Jeshua Friedrichs, Okke Melse, Gerhard Schenk, Volker Sieber   +4 more
wiley   +1 more source

A Novel Polyphosphate‐Degrading Enzyme Confers Growth on Exogenous Polyphosphate in the Archaeon Haloferax volcanii

Environmental Microbiology, Volume 28, Issue 7, July 2026.
A novel polyP‐degrading enzyme with an activity differing from those currently known was found in Haloferax volcanii, conferring the ability for this microbe to grow on extracellular polyP. These findings further our understanding of the potential ecological roles of polyP and how archaea metabolise this essential biopolymer.
Jack W. F. Nicholls, Vincent O'Flaherty, Timothy M. Lenton, John W. McGrath, Jason P. Chin   +4 more
wiley   +1 more source

Is a Malleable Active Site Loop the Key to High Substrate Promiscuity? Hybrid, Biocatalytic Route to Structurally Diverse Taxoid Side Chains with Remarkable Dual Stereocontrol

Angewandte Chemie, Volume 137, Issue 36, September 1, 2025.
A highly stereoselective, dynamic reductive kinetic resolution (DYRKR) entry into myriad Taxotere‐like side chains with Clostridium acetobutylicum alcohol dehydrogenase (CaADH) enzyme is reported. Follow‐on cross couplings expand the structural diversity of the library (36 total examples).
Gaurav P. Kudalkar, Florian Leidner, Nivesh Kumar, Jared L. Hass, Peter Madzelan, Douglas R. Powell, Victor W. Day, Pierre Le Magueres, Joseph D. Ferrara, Lee M. Daniels, Akihito Yamano, Sho Ito, Wei Niu, Helmut Grubmüller, Mark A. Wilson, David B. Berkowitz   +15 more
wiley   +2 more sources

Crystal structure of the S. solfataricus archaeal exosome reveals conformational flexibility in the RNA-binding ring. [PDF]

PLoS ONE, 2010
The exosome complex is an essential RNA 3'-end processing and degradation machinery. In archaeal organisms, the exosome consists of a catalytic ring and an RNA-binding ring, both of which were previously reported to assume three-fold symmetry.Here we ...
Changrui Lu, Fang Ding, Ailong Ke
doaj   +1 more source

An AGT-based protein-tag system for the labelling and surface immobilization of enzymes on E. coli outer membrane

Journal of Enzyme Inhibition and Medicinal Chemistry, 2019
The use of natural systems, such as outer membrane protein A (OmpA), phosphoporin E (PhoE), ice nucleation protein (INP), etc., has been proved very useful for the surface exposure of proteins on the outer membrane of Gram-negative bacteria.
Rosa Merlo, Sonia Del Prete, Anna Valenti, Rosanna Mattossovich, Vincenzo Carginale, Claudiu T. Supuran, Clemente Capasso, Giuseppe Perugino   +7 more
doaj   +1 more source

Activation of SsoPK4, an Archaeal eIF2α Kinase Homolog, by Oxidized CoA

Proteomes, 2015
The eukaryotic protein kinase (ePK) paradigm provides integral components for signal transduction cascades throughout nature. However, while so-called typical ePKs permeate the Eucarya and Bacteria, atypical ePKs dominate the kinomes of the Archaea ...
William K. Ray, Mark B. Potters, January D. Haile, Peter J. Kennelly   +3 more
doaj   +1 more source

The dynamic interplay of host and viral enzymes in type III CRISPR-mediated cyclic nucleotide signalling

eLife, 2020
Cyclic nucleotide second messengers are increasingly implicated in prokaryotic anti-viral defence systems. Type III CRISPR systems synthesise cyclic oligoadenylate (cOA) upon detecting foreign RNA, activating ancillary nucleases that can be toxic to ...
Januka S Athukoralage, Shirley Graham, Christophe Rouillon, Sabine Grüschow, Clarissa M Czekster, Malcolm F White   +5 more
doaj   +1 more source

Snapshots of Motion: A Novel Structural Intermediate Reveals Conserved Dynamics in Archaeal DNA Ligases

Proteins: Structure, Function, and Bioinformatics, Volume 94, Issue 6, Page 1245-1258, June 2026.
ABSTRACT We present the first x‐ray crystallographic structural evidence of an archaeal DNA ligase showing the AMP covalent adduct together with further cofactor hydrolysis, capturing a transient intermediary in the first step of the ligation reaction, triggered by the pyrophosphate hydrolysis.
A. X. Quintana‐Armas, E. Flores‐Hernández, C. Cardona‐Félix, E. Rudiño‐Piñera   +3 more
wiley   +1 more source

Binding dynamics of a monomeric SSB protein to DNA : a single-molecule multi-process approach [PDF]

, 2015
People Programme of the European Union’s Seventh Framework Programme [REA 334496 to B.E.B.]; Leonardo da Vinci European Union Programme (to M.F.G.); Wellcome Trust [099149/Z/12/Z, 091825/Z/10/Z]. Funding for open access charge: Wellcome Trust; University
J. Carlos Penedo, Maria Figueira-gonzalez, White, Malcolm F, Ackermann, Katrin, Katrin Ackermann, Penedo, Carlos, Peregrina, Jose Ramon, Bode, Bela Ernest, Michael J. Morten, Figueira-Gonzalez, Maria, Malcolm F. White, Bela E. Bode, Morten, Michael John, Jose R. Peregrina, Bode, Bela Ernest; id_orcid, White, Malcolm F; id_orcid, Penedo, Carlos; id_orcid, Ackermann, Katrin; id_orcid   +17 more
core   +1 more source

Alterations of the transcriptome of Sulfolobus acidocaldarius by exoribonuclease aCPSF2.

PLoS ONE, 2013
Recent studies identified a 5´ to 3´ exoribonuclease termed Sso-RNase J in the crenarchaeon Sulfolobus solfataricus (Sso), which has been reclassified to the aCPSF2 (archaeal cleavage and polyadenylation specificity factor 2) group of β-CASP proteins. In
Birgit Märtens, Fabian Amman, Salim Manoharadas, Lukas Zeichen, Alvaro Orell, Sonja-Verena Albers, Ivo Hofacker, Udo Bläsi   +7 more
doaj   +1 more source