Results 51 to 60 of about 304,542 (327)

Characterisation of multiple substrate-specific (d)ITP/(d)XTPase and modelling of deaminated purine nucleotide metabolism [PDF]

open access: yes, 2011
To be viable, organisms possess a number of (deoxy)nucleotide phosphohydrolases, which hydrolyze these nucleotides removing them from the active NTP and dNTP pools. Deamination of purine bases can result in accumulation of such nucleotides as ITP, dITP,
Davies, Oluwafemi   +3 more
core   +2 more sources

Unified prebiotically plausible synthesis of pyrimidine and purine RNA ribonucleotides

open access: yesScience, 2019
Conditions right for making nucleosides In the absence of biological catalysts and metabolism, can atmospheric and geochemical processes provide the substrates and conditions required for production of biological molecules? Becker et al.
S. Becker   +9 more
semanticscholar   +1 more source

Expanding a fluorescent RNA alphabet: synthesis, photophysics and utility of isothiazole-derived purine nucleoside surrogates. [PDF]

open access: yes, 2017
A series of emissive ribonucleoside purine mimics, all comprised of an isothiazolo[4,3-d]pyrimidine core, was prepared using a divergent pathway involving a key Thorpe-Ziegler cyclization.
Fin, Andrea   +2 more
core   +1 more source

Purine Metabolites in Tumor-Derived Exosomes May Facilitate Immune Escape of Head and Neck Squamous Cell Carcinoma

open access: yesCancers, 2020
Body fluids of patients with head and neck squamous cell carcinoma (HNSCC) are enriched in exosomes that reflect properties of the tumor. The aim of this study was to determine whether purine metabolites are carried by exosomes and evaluate their role as
N. Ludwig   +4 more
semanticscholar   +1 more source

Electron transport chain inhibition increases cellular dependence on purine transport and salvage

open access: yesCell Metabolism
SUMMARY Mitochondria house many metabolic pathways required for homeostasis and growth. To explore how human cells respond to mitochondrial dysfunction, we performed metabolomics in fibroblasts from patients with various mitochondrial disorders and ...
Zheng Wu   +25 more
semanticscholar   +1 more source

Regulation of Microglial Functions by Purinergic Mechanisms in the Healthy and Diseased CNS

open access: yesCells, 2020
Microglial cells, the resident macrophages of the central nervous system (CNS), exist in a process-bearing, ramified/surveying phenotype under resting conditions.
Peter Illes   +4 more
doaj   +1 more source

ERK2 Phosphorylates PFAS to Mediate Posttranslational Control of De Novo Purine Synthesis.

open access: yesMolecules and Cells, 2020
The RAS-ERK/MAPK (RAS-extracellular signal-regulated kinase/mitogen-activated protein kinase) pathway integrates growth-promoting signals to stimulate cell growth and proliferation, at least in part, through alterations in metabolic gene expression ...
Eunus S. Ali   +8 more
semanticscholar   +1 more source

Role of HIV RNA structure in recombination and speciation: romping in purine A, keeps HTLV away

open access: yes, 2013
Extreme enrichment of the human immunodeficiency virus (HIV-1) RNA genome for the purine A parallels the mild purine-loading of the RNAs of most organisms.
Forsdyke, Donald R.
core   +1 more source

FAMIN Is a Multifunctional Purine Enzyme Enabling the Purine Nucleotide Cycle

open access: yesCell, 2020
M. Zaeem Cader1,2,8, Rodrigo Pereira de Almeida Rodrigues1,2,8, James A. West1,2,3,8, Gavin W. Sewell1,2, Muhammad N. Md-Ibrahim1,2, Stephanie Reikine1,4, Giuseppe Sirago1,2, Lukas W.
M. Z. Cader   +21 more
semanticscholar   +1 more source

Profiles of Streptococcus thermophilus MN‐ZLW‐002 nutrient requirements in controlled pH batch fermentations

open access: yesMicrobiologyOpen, 2019
This study aimed to evaluate the profiles of Streptococcus thermophilus nutrient requirements to guide the design of media for high cell density culturing. The growth kinetics, physiological state, and nutrient requirement profiles of S.
Gefei Liu   +8 more
doaj   +1 more source

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