Results 41 to 50 of about 10,455 (304)

A dedicated haem lyase is required for the maturation of a novel bacterial cytochrome c with unconventional covalent haem binding [PDF]

, 2007
In bacterial c-type cytochromes, the haem cofactor is covalently attached via two cysteine residues organized in a haem c-binding motif. Here, a novel octa-haem c protein, MccA, is described that contains only seven conventional haem c-binding motifs ...
Allen J.W.A., Allen J.W.A., Allen J.W.A., Allen J.W.A., Beliaev A.S., de Vitry C., Dobbin P.S., Hartshorne S., Kroger A., Lorenzen J.P., Mileni M., Moore G.R., Mowat C.G., Scott R.A., Thony-Meyer L., Walker F.A., Wood P.M., Yang F.   +17 more
core   +1 more source

NITRIFYING AND PATHOGENIC BACTERIAL FLUCTUATION DURING NITROGEN REMOVAL FROM WASTEWATER IN ZAKHO CITY/IRAQ

Science Journal of University of Zakho, 2023
The high concentration of nitrogen (N) compounds in wastewater was found to be creating a reason of eutrophication, effect the biodiversity of aquatic ecosystems and human health.
Khawla A. Mohammed, Mustafa I. Umer , Yasir M. Alyazichi   +2 more
doaj   +1 more source

Highly diverse nirK genes comprise two major clades that harbour ammonium-producing denitrifiers [PDF]

, 2016
Background: Copper dependent nitrite reductase, NirK, catalyses the key step in denitrification, i.e. nitrite reduction to nitric oxide. Distinct structural NirK classes and phylogenetic clades of NirK-type denitrifiers have previously been observed ...
Decleyre, Helen, Heylen, Kim, Tytgat, Bjorn, Willems, Anne   +3 more
core   +3 more sources

Microbial characteristics, carbon and nitrogen content in cambisols and luvisols

Plant, Soil and Environment, 2004
Tested soils (1991-2002) were defined by chemical, textural and microbial characteristics. From the tests which describe cambisols, the following parameters have to be stressed.
L. Růžek, K. Voříšek, S. Strnadová, M. Nováková, W. Barabasz   +4 more
doaj   +1 more source

Soil biological activity of mulching and cut/harvested land set aside

Plant, Soil and Environment, 2008
Formerly arable luvic chernozem set aside for ten years (1997-2006) with different herbaceous cover (grass, legumes and their mixtures) and agronomical practices (mulching and cut/harvesting) was studied.
M. Růžková, L. Růžek, K. Voříšek
doaj   +1 more source

Structural instability impairs function of the UDP‐xylose synthase 1 Ile181Asn variant associated with short‐stature genetic syndrome in humans

FEBS Letters, EarlyView.
The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li, Pedro A. Sánchez‐Murcia, Bernd Nidetzky   +2 more
wiley   +1 more source

Effects of Silvopasture Establishment on Aqueous and Gaseous Soil N Losses at the University of New Hampshire Organic Dairy Research Farm [PDF]

, 2017
The expansion of local agriculture in the New England region is putting increased pressure on farmers to expand their arable land base. While clear-cutting is a traditional method of converting forested land to agriculture, it is known for having ...
Slebodnik, Kathryn Ann
core   +1 more source

Tau acetylation at K331 has limited impact on tau pathology in vivo

FEBS Letters, EarlyView.
We mapped tau post‐translational modifications in humanized MAPT knock‐in mice and in amyloid‐bearing double knock‐in mice. Acetylation within the repeat domain, particularly around K331, showed modest increases under amyloid pathology. To test functional relevance, we generated MAPTK331Q knock‐in mice.
Shoko Hashimoto, Yukio Matsuba, Mika Takahashi, Takaomi C. Saido   +3 more
wiley   +1 more source

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

FEBS 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, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Soil Nitrogen Transformation Process Influenced by Litterfall Manipulation in Two Subtropical Forest Types

Frontiers in Plant Science, 2022
Nitrogen (N) is often recognized as the primary limiting nutrient element for the growth and production of forests worldwide. Litterfall represents a significant pathway for returning nutrients from aboveground parts of trees to the soils and plays an ...
Wende Yan, Wende Yan, Wende Yan, Wende Yan, Taimoor Hassan Farooq, Taimoor Hassan Farooq, Yi Chen, Yi Chen, Wancai Wang, Wancai Wang, Rubab Shabbir, Uttam Kumar, Muhammad Umair Riaz, Saqer S. Alotaibi, Yuanying Peng, Xiaoyong Chen, Xiaoyong Chen   +16 more
doaj   +1 more source