Results 51 to 60 of about 26,570 (248)

Cobalamin-Independent Methionine Synthase from Escherichia coli:  A Zinc Metalloenzyme^†

, 2016
Cobalamin-independent methionine synthase (MetE) from Escherichia coli catalyzes the transfer of a methyl group from methyltetrahydrofolate to homocysteine.
James E. Penner-Hahn (1518652), Julio C. González (2948796), Katrina Peariso (795252), Rowena G. Matthews (2379991)   +3 more
core   +1 more source

A 17 Year Old With Developmental Delay Presenting With Increasing Confusion and Imbalance

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Methylmalonic acidemia is an autosomal recessive genetic disorder primarily caused by defects in methylmalonyl‐CoA mutase and cobalamin (vitamin B12) metabolism. These defects disrupt the tricarboxylic acid cycle and oxidative phosphorylation, leading to the abnormal accumulation of metabolic products such as methylmalonic acid, propionic acid,
Wei Zhao, Yingli Zhang, Hongliang Zheng
wiley   +1 more source

Cobalamin-binding proteins in normal and cobalamin-deficient older subjects.

, 2003
Item does not contain fulltextBACKGROUND: The causes of cobalamin (vitamin B(12)) deficiency in older people are only partly understood. We investigated the role of the cobalamin-binding proteins and tested the hypothesis that low saturated ...
Hoefnagels, W.H.L., Asselt, D.Z.B. van, Blom, H.J., Segers, M.F.G., Thomas, C.M.G., Wevers, R.A.   +5 more
core   +1 more source

H2S‐Amplified “Three‐in‐One” Antibacterial Strategy for Periodontitis Treatment Using a Photosensitive Pillararene‐Embedded COF/MOF Hybrid

Advanced Science, EarlyView.
The integration of ROS‐generating systems with H2S depletion strategies effectively overcomes the limitations imposed by endogenous antioxidant defenses on ROS‐based antimicrobial therapies. In this study, the Cu‐MOF is incorporated into pillararene‐embedded COF, achieving a “three‐in‐one” antimicrobial effect that markedly alleviated periodontal ...
Shuang Liang, Meng‐Hao Li, Liang Cheng, Tian‐Shou Zhang, Hui Hui, Yan Wang, Hong‐Pu Zhang, Bo‐Wen Liu, Lin Wang, Ying‐Wei Yang   +9 more
wiley   +1 more source

Multicolor and Attenuated Light Intensity Responses in Protein Hydrogels Arising from Photoregulated Crosslink Dynamics

Angewandte Chemie International Edition, EarlyView.
A fully protein‐based hydrogel integrated two orthogonal photoreceptors to enable reversible manipulation of stiffness with red/far‐red light and irreversible gel‐sol transitions with green light. Unexpectedly, high‐intensity red light results in attenuated stiffening and dark‐adaptation, arising from increased crosslinking dynamics in the ...
Saskia Frank, Seraphine V. Wegner
wiley   +1 more source

Evaluating Red Patches and Burning Mouth Symptoms as Oral Biomarkers in Cobalamin Deficiency: A Comparative Study

Plasmatology
Background Vitamin B12 (cobalamin) deficiency can manifest through various nonspecific oral symptoms. Early diagnosis is crucial but challenging due to subtle and progressive clinical features.
Sanjay Chikkarasinakere Jogigowda MDS, Karthikeya Patil MDS, Varusha Sharon Christopher MDS, Namrata Suresh MDS, Shilpa Padar Shastry MDS, Vidya Gowdappa Doddawad MDS   +5 more
doaj   +1 more source

Structure of full-length cobalamin-dependent methionine synthase and cofactor loading captured in crystallo

Nature Communications, 2023
Cobalamin-dependent methionine synthase (MS) is a key enzyme in methionine and folate one-carbon metabolism. MS is a large multi-domain protein capable of binding and activating three substrates: homocysteine, folate, and S-adenosylmethionine for ...
Johnny Mendoza, Meredith Purchal, Kazuhiro Yamada, Markos Koutmos   +3 more
doaj   +1 more source

Systemic Scedosporium prolificans infection in an 11-month-old Border collie with cobalamin deficiency secondary to selective cobalamin malabsorption (canine Imerslund-Gräsbeck syndrome)

, 2017
An 11-month-old Border collie presented collapsed and continued to deteriorate rapidly despite supportive treatment. The dog had a history of failure to thrive and recurring respiratory infection.
Mugford, A, K. Erles, Leeb, T, Leeb, T., Barfield, D, Erles, K, Barfield, D M, T. Leeb, Kook, P H, P. H. Kook, Kook, Peter H; https://orcid.org/, D. Barfield, A. Mugford   +12 more
core   +1 more source

Risk of venous thromboembolism after SARS‐CoV‐2 vaccination—Evidence from genome‐wide association study and population‐based observational study

British Journal of Clinical Pharmacology, EarlyView.
Aim We aimed to investigate whether genetic variation is associated with venous thromboembolism after immunization with SARS‐CoV‐2 vaccines. Methods We conducted a genome‐wide association study (GWAS) on cases of venous thromboembolism within 42 days after SARS‐CoV‐2 vaccination, recruited from reports of adverse drug reactions sent to the Swedish ...
Sofia Attelind, Niclas Eriksson, Marco Cavalli, Yiyi Xu, Fredrik Nyberg, Anders Sundström, Mia Wadelius, Pär Hallberg   +7 more
wiley   +1 more source

Rationales for the Choice of Metals for Super‐Reduced Biological Metal Centers: Cobalt in Cobalamin Versus Nickel in F430

Chemistry – A European Journal, EarlyView.
DFT calculations on porphyrin, corrin, and corphin complexes of cobalt, rhodium, iron, manganese, or nickel, and QM/MM calculations on enzyme models, explore the factors controlling the availably of super‐reduced metal(I) states. True metal(I) states are seen in corrin only for cobalt, in corphin only for nickel, and not at all in porphyrin.
Radu‐Ioan Onija, Sergiu‐Raul Cosma, Adrian M. V. Brânzanic, Radu Silaghi‐Dumitrescu   +3 more
wiley   +1 more source