Results 21 to 30 of about 391,026 (214)

Specific Heat upon Aqueous Unfolding of the Protein Interior: A Theoretical Approach [PDF]

, 2001
We study theoretically the thermodynamics, over a broad temperature range (5 C to 125 C), related to hydrated water upon protein unfolding. The hydration effect is modeled as interacting dipoles in an external field, mimicking the influence from the unfolded surfaces on the surrounding water compared to bulk water.
arxiv   +1 more source

Etoposide‐induced cancer cell death: roles of mitochondrial VDAC1 and calpain, and resistance mechanisms

Molecular Oncology, EarlyView.
The complex mode of action of the topoisomerase II inhibitor etoposide in triggering apoptosis involves several mechanisms: overexpression of the mitochondrial protein VDAC1, leading to its oligomerization and formation of a large channel that mediates the release of pro‐apoptotic protein; and overexpression of the apoptosis regulators p53, Bax, and ...
Aditya Karunanithi Nivedita, Varda Shoshan‐Barmatz   +1 more
wiley   +1 more source

TOMM20 as a driver of cancer aggressiveness via oxidative phosphorylation, maintenance of a reduced state, and resistance to apoptosis

Molecular Oncology, EarlyView.
TOMM20 increases cancer aggressiveness by maintaining a reduced state with increased NADH and NADPH levels, oxidative phosphorylation (OXPHOS), and apoptosis resistance while reducing reactive oxygen species (ROS) levels. Conversely, CRISPR‐Cas9 knockdown of TOMM20 alters these cancer‐aggressive traits.
Ranakul Islam, Megan E. Roche, Zhao Lin, Diana Whitaker‐Menezes, Victor Diaz‐Barros, Eurico Serrano, Maria Paula Martinez Cantarin, Nancy J. Philp, Atrayee Basu Mallick, Ubaldo Martinez‐Outschoorn   +9 more
wiley   +1 more source

Actinorhodin Biosynthesis Terminates with an Unprecedented Biaryl Coupling Reaction

Angewandte Chemie, Volume 135, Issue 5, January 26, 2023., 2023
The last dimerization step of actinorhodin (ACT) biosynthesis was established through biochemical studies. ActVA‐ORF4 is a unique NAD(P)H‐dependent enzyme that catalyzes the biaryl‐coupling reaction using 8‐hydroxydihydrokalafungin (DHK‐OH) as the sole substrate. ActVA‐ORF3 is a quinone‐forming enzyme that forms DHK‐OH and ACT.
Makoto Hashimoto, Susumu Watari, Takaaki Taguchi, Kazuki Ishikawa, Takuya Kumamoto, Susumu Okamoto, Koji Ichinose   +6 more
wiley   +2 more sources

Comparing self‐reported race and genetic ancestry for identifying potential differentially methylated sites in endometrial cancer: insights from African ancestry proportions using machine learning models

Molecular Oncology, EarlyView.
Integrating ancestry, differential methylation analysis, and machine learning, we identified robust epigenetic signature genes (ESGs) and Core‐ESGs in Black and White women with endometrial cancer. Core‐ESGs (namely APOBEC1 and PLEKHG5) methylation levels were significantly associated with survival, with tumors from high African ancestry (THA) showing ...
Huma Asif, J. Julie Kim
wiley   +1 more source

Critical appraisal on mitochondrial dysfunction in Alzheimer’s disease

AGING MEDICINE, Volume 5, Issue 4, Page 272-280, December 2022., 2022
Amyloid plaques deposit on neurons in case of Alzheimer's Disease. Mitochondria play a vital role in pathogenesis of Alzheimer's Disease. Mitochondrial dysfunction can lead to formation of mPTP, alteration of complexes 1,3 and 4, deficits in bioenergetics with impaired mitochondrial biogenesis. Abstract It is widely recognized that Alzheimer's disease (
Faizan Ahmad, Punya Sachdeva
wiley   +1 more source

Preparative‐Scale Biocatalytic Oxygenation of N‐Heterocycles with a Lyophilized Peroxygenase Catalyst

Angewandte Chemie, Volume 135, Issue 5, January 26, 2023., 2023
A lyophilized preparation of an unspecific peroxygenase variant from Agrocybe aegerita (rAaeUPO‐PaDa‐I‐H) is a highly effective catalyst for the oxygenation of a diverse range of N‐heterocyclic compounds. Scalable, high yielding and enantioselective biocatalytic oxygenations have been developed, including 27 preparative examples (ca.
Balázs Pogrányi, Tamara Mielke, Alba Díaz‐Rodríguez, Jared Cartwright, William P. Unsworth, Gideon Grogan   +5 more
wiley   +2 more sources

Purification and characterization of a thermophilic NAD+‐dependent lactate dehydrogenase from Moorella thermoacetica

FEBS Open Bio, EarlyView.
The thermophilic acetogenic model organism Moorella thermoacetica can utilize lactate as substrate. The formation of lactate by reduction of pyruvate is energetically favorable, but the reverse reaction, the oxidation of lactate to pyruvate with NAD+ as electron acceptor is challenging.
Florian P. Rosenbaum, Volker Müller
wiley   +1 more source

Mathematical Model for Chemical Reactions in Electrolyte Applied to Cytochrome $c$ Oxidase: an Electro-osmotic Approach [PDF]

arXiv, 2022
A mathematical model for chemical reactions in electrolytes is developed using an Energy variational method consistent with classical thermodynamics. Electrostatics and chemical reactions are included in properly defined energetic and dissipative functionals.
arxiv  

Neuroglobin protects nerve cells from apoptosis by inhibiting the intrinsic pathway of cell death [PDF]

Apoptosis 15:401-411 (2010), 2010
In the past few years, overwhelming evidence has accrued that a high level of expression of the protein neuroglobin protects neurons in vitro, in animal models, and in humans, against cell death associated with hypoxic and amyloid insult. However, until now, the exact mechanism of neuroglobin's protective action has not been determined.
arxiv   +1 more source