Results 71 to 80 of about 651,887 (304)

The reaction mechanism of metallo-beta-lactamases is tuned by the conformation of an active site mobile loop [PDF]

open access: yes, 2018
Carbapenems are "last resort" β-lactam antibiotics used to treat serious and life-threatening health care-associated infections caused by multidrug-resistant Gram-negative bacteria.
Alzari, Pedro M.   +10 more
core   +1 more source

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

open access: yesFEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel   +13 more
wiley   +1 more source

Effect of various processing parameters on the quality of papaya fruit tea [PDF]

open access: yes, 2005
Exotic fruits from which drinks are ma de in most tropical countries are so abundant and such in a great variety, that it would probably be impossible for people to sample all of them, but they worth a try.
Abdul Majid, Fadzilah Adibah   +2 more
core  

Enhanced lipid extraction from unbroken microalgal cells using enzymes [PDF]

open access: yes, 2015
The marine microalga Nannochloropsis sp. was chosen as a model organism to investigate the feasibility of using cell wall-degrading enzymes to enhance the recovery of intracellular lipids.
Familiari, Giuseppe   +7 more
core   +1 more source

Engineering enzyme access tunnels

open access: yesBiotechnology Advances, 2019
Enzymes are efficient and specific catalysts for many essential reactions in biotechnological and pharmaceutical industries. Many times, the natural enzymes do not display the catalytic efficiency, stability or specificity required for these industrial processes.
Kokkonen, Piia   +4 more
openaire   +3 more sources

Valosin‐containing protein counteracts ATP‐driven dissolution of FUS condensates through its ATPase activity in vitro

open access: yesFEBS Letters, EarlyView.
Biomolecular condensates formed by fused in sarcoma (FUS) are dissolved by high ATP concentrations yet persist in cells. Using a reconstituted system, we demonstrate that valosin‐containing protein (VCP), an AAA+ ATPase, counteracts ATP‐driven dissolution of FUS condensates through its D2 ATPase activity.
Hitomi Kimura   +2 more
wiley   +1 more source

A novel enzymatic approach to nanocrystalline cellulose preparation [PDF]

open access: yes, 2018
In this work, conditions for an enzymatic pretreatment prior to NCC isolation from cotton linter were assessed. Different cellulase doses and reaction times were studied within an experimental design and NCC were obtained. At optimal enzymatic conditions
Beltramino, Facundo   +3 more
core   +2 more sources

Hyperosmotic stress induces PARP1‐mediated HPF1‐dependent mono(ADP‐ribosyl)ation

open access: yesFEBS Letters, EarlyView.
Sorbitol‐induced hyperosmotic stress rapidly induces reversible mono(ADP‐ribosyl)ation (MARylation) on PARP1 without the signs of genotoxic signaling. We show that PARP1 autoMARylation is HPF1 dependent and forms hydroxylamine‐resistant O‐glycosidic linkages.
Anna Georgina Kopasz   +11 more
wiley   +1 more source

Comparative transcriptome analysis reveals key genes associated with meiotic stability and high seed setting rate in tetraploid rice

open access: yesBMC Plant Biology
Background Polyploid rice has a high yield potential and excellent nutritional quality. The development of polyploid rice remained critically limited for several decades due to low seed setting rate until the successful breeding of polyploid meiosis ...
Pincang Lv   +9 more
doaj   +1 more source

Engineering enzyme catalysis: an inverse approach [PDF]

open access: yesBioscience Reports, 2019
Abstract Enzymes’ inherent chirality confers their exquisite enantiomeric specificity and makes their use as green alternatives to chiral metal complexes or chiral organocatalysts invaluable to the fine chemical industry. The most prevalent way to alter enzyme activity in terms of regioselectivity and stereoselectivity for both industry ...
openaire   +3 more sources

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