Results 71 to 80 of about 196,005 (260)

O2 Activation at an Enzymatic Diiron Site: Bridging Ligand Substitutions Alter Diferric‐(Hydro)peroxo States

open access: yesAngewandte Chemie International Edition, Volume 65, Issue 5, 28 January 2026.
Substituting the bridging carboxylates in diFe sulerythrin shifts the bridging ligand coordination from 1,3‐carboxylate to 1,1‐carboxylate, yielding all three diferrous bridging motifs in one protein. This shortens the Fe–Fe distance and increases reactivity with O2.
Jae‐Hun Jeoung   +6 more
wiley   +1 more source

A Ferredoxin Disulfide Reductase Delivers Electrons to the Methanosarcina barkeri Class III Ribonucleotide Reductase

open access: yesBiochemistry, 2015
Two subtypes of class III anaerobic ribonucleotide reductases (RNRs) studied so far couple the reduction of ribonucleotides to the oxidation of formate, or the oxidation of NADPH via thioredoxin and thioredoxin reductase.
Yifeng Wei   +5 more
semanticscholar   +1 more source

DNA methyltransferase inhibitors in hematological malignancies and solid tumors

open access: yesInternational Journal of Cancer, Volume 158, Issue 2, Page 433-461, 15 January 2026.
Abstract Epigenetic modifications such as DNA methylation play a fundamental role in oncogenesis and the progression of neoplasms neoplasias. DNA methyltransferase inhibitors (DNMTi) constitute a family of therapeutic agents that impede the methylation at the 5‐position on cytosine nucleotides, thereby modulating the epigenetic regulation of tumor ...
Valentin Wenger   +3 more
wiley   +1 more source

Ribonucleotide reductase M2 (RRM2): Regulation, function and targeting strategy in human cancer

open access: yesGenes and Diseases, 2022
Zanwen Zuo   +6 more
semanticscholar   +1 more source

CSN6 Promotes Pancreatic Cancer Progression and Gemcitabine Resistance via Antagonizing DCAF1‐Mediated Ubiquitination of NPM1

open access: yesAdvanced Science, Volume 13, Issue 1, 5 January 2026.
COP9 signalosome subunit 6 (CSN6) promotes the auto‐ubiquitination and degradation of DDB1‐CUL4 associated factor 1 (DCAF1), thereby antagonizing DCAF1‐mediated ubiquitination of Nucleophosmin (NPM1). This stabilization of NPM1 enhances the ribosome biogenesis process and the translation of specific gemcitabine‐resistance proteins, ultimately driving ...
Yijing Zhang   +14 more
wiley   +1 more source

Thioredoxin and glutaredoxin-mediated redox regulation of ribonucleotide reductase.

open access: yesWorld Journal of Biological Chemsitry, 2014
Ribonucleotide reductase (RNR), the rate-limiting enzyme in DNA synthesis, catalyzes reduction of the different ribonucleotides to their corresponding deoxyribonucleotides.
R. Sengupta, A. Holmgren
semanticscholar   +1 more source

Metabolism‐Regulating Nanomedicines for Cancer Therapy

open access: yesAdvanced NanoBiomed Research, Volume 6, Issue 1, January 2026.
This review highlights metabolism‐regulating nanomedicines designed to target glycolytic, lipid, amino acid, and nucleotide pathways in tumors. By incorporating metabolism‐regulating agents into versatile nanocarriers such as liposomes, micelles, dendrimers, and engineered bacteria, these platforms achieve targeted delivery, controlled release ...
Xiao Wu, Shiyi Geng, Jian Yang
wiley   +1 more source

Electronic and Structural Heterogeneity in the Diiron Center of Sulerythrin: Insights From Hybrid QM/MM Calculations

open access: yesChemPhysChem, Volume 27, Issue 2, January 2026.
QM/MM modeling of Sulerythrin (SulE) identifies three electronic states of its diiron center, differing in protonation and bridging ligands. The results reconcile crystallographic heterogeneity and reveal how subtle electronic and structural changes govern non‐heme diiron enzyme reactivity.
Samah Moubarak, Maria Andrea Mroginski
wiley   +1 more source

XRCC2 Regulates Replication Fork Progression during dNTP Alterations

open access: yesCell Reports, 2018
Summary: RAD51 paralogs are essential for maintenance of genomic integrity through protection of stalled replication forks and homology-directed repair (HDR) of double-strand breaks.
Sneha Saxena   +2 more
doaj   +1 more source

Unveiling the Connection: Viral Infections and Genes in dNTP Metabolism

open access: yesViruses
Deoxynucleoside triphosphates (dNTPs) are crucial for the replication and maintenance of genomic information within cells. The balance of the dNTP pool involves several cellular enzymes, including dihydrofolate reductase (DHFR), ribonucleotide reductase (
Shih-Yen Lo   +3 more
doaj   +1 more source

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