Results 51 to 60 of about 277 (144)

Hydrogen bonding to the cysteine ligand of superoxide reductase: acid--base control of the reaction intermediates [PDF]

Journal of biological inorganic chemistry : JBIC : a publication of the Society of Biological Inorganic Chemistry, 2013, 18, pp.815 - 830, 2015
Superoxide reductase SOR is a non-heme iron metalloenzyme that detoxifies superoxide radical in microorganisms. Its active site consists of an unusual non-heme Fe2+ center in a [His4 Cys1] square pyramidal pentacoordination, with the axial cysteine ligand proposed to be an essential feature in catalysis.
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

Interactions of aqueous amino acids and proteins with the (110) surface of ZnS in molecular dynamics simulations [PDF]

J. Chem. Phys. 140, 095101 (2014), 2014
The growing usage of nanoparticles of zinc sulfide as quantum dots and biosensors calls for a theoretical assessment of interactions of ZnS with biomolecules. We employ the molecular-dynamics-based umbrella sampling method to determine potentials of mean force for 20 single amino acids near the ZnS (110) surface in aqueous solutions.
arxiv   +1 more source

Determination of ADP/ATP translocase isoform ratios in malignancy and cellular senescence

Molecular Oncology, EarlyView.
The individual functions of three isoforms exchanging ADP and ATP (ADP/ATP translocases; ANTs) on the mitochondrial membrane remain unclear. We developed a method for quantitatively differentiating highly similar human ANT1, ANT2, and ANT3 using parallel reaction monitoring. This method allowed us to assess changes in translocase levels during cellular
Zuzana Liblova, Dominika Maurencova, Barbora Salovska, Marek Kratky, Tomas Mracek, Zuzana Korandova, Alena Pecinova, Pavla Vasicova, David Rysanek, Ladislav Andera, Ivo Fabrik, Rudolf Kupcik, Pavel Kashmel, Pinky Sultana, Vojtech Tambor, Jiri Bartek, Josef Novak, Marie Vajrychova, Zdenek Hodny   +18 more
wiley   +1 more source

CHANGES IN LEVELS OF ACTIVITY OF SERINE PROTEASES ACCOMPANY THE EXPOSURE OF COMMON BEAN (PHASEOLUS VULGARIS L.) TO WATER DEFICIT [PDF]

Poljoprivreda, 2008
A wide variety of proteolytic enzymes exist in plants. On their levels depends protein turnover, a fundamental component in plant development and adaptation to environmental conditions. Cysteine proteases have frequently been reported to be influenced by
M. Budič, M. Šoštarič, B. Cigić, M. Kidrič, V. Meglič   +4 more
doaj  

Neuronal C/EBPβ Shortens the Lifespan via Inactivating NAMPT

Advanced Science, EarlyView.
Schematic diagram illustrating the mechanism of shortened lifespan in Thy 1‐C/EBPβ transgenic mice and intervention strategies. Briefly, C/EBPβ/AEP escalation in the aging brain triggers NAMPT fragmentation and NAD+ depletion. Knockout of AEP from Thy 1‐C/EBPβ Tg/Tg mice ameliorates cognitive impairments and elongates the lifespan.
Bowei Li, Zhongyun Xie, Mengmeng Wang, Shuke Nie, Zhengjiang Qian, Xin Meng, Xia Liu, Seong Su Kang, Keqiang Ye   +8 more
wiley   +1 more source

Efficient Cysteine Conformer Search with Bayesian Optimization [PDF]

arXiv, 2020
Finding low-energy molecular conformers is challenging due to the high dimensionality of the search space and the computational cost of accurate quantum chemical methods for determining conformer structures and energies. Here, we combine active-learning Bayesian optimization (BO) algorithms with quantum chemistry methods to address this challenge ...
arxiv  

Deciphering the Metabolic Impact and Clinical Relevance of N‐Glycosylation in Colorectal Cancer through Comprehensive Glycoproteomic Profiling

Advanced Science, EarlyView.
The comprehensive proteomic and N‐glycoproteomic analyses of 45 colorectal cancer tissues with matched normal adjacent tissues identified 7125 intact N‐glycopeptides from 704 glycoproteins. A glycosylation site‐protein function network revealing metabolic dysregulation is constructed and a model differentiating tumors from normal tissues is developed ...
Guobin Liu, Lu Chen, Jingxiang Zhao, Yue Jiang, Yarong Guo, Xiang Mao, Xuelian Ren, Kun Liu, Qi Mei, Qunyi Li, He Huang   +10 more
wiley   +1 more source

Funastrain c II: A Cysteine Endopeptidase Purified from the Latex of Funastrum clausum [PDF]

The Protein Journal, 2004
A cysteine endopeptidase, named funastrain c II, was isolated and characterized from the latex of Funastrum clausum (Asclepiadaceae). The molecular mass (mass spectrometry) of the protease was 23.636 kDa. The analysis of funastrain c II by SDS-PAGE revealed a single polypeptide chain.
Morcelle del Valle, Susana Raquel, Trejo, Sebastián Alejandro, Canals, Francesc, Avilés, Francesc X., Priolo de Lufrano, Nora Silvia   +4 more
openaire   +3 more sources

The tau isoform 1N4R confers vulnerability of MAPT knockout human iPSC‐derived neurons to amyloid beta and phosphorylated tau‐induced neuronal dysfunction

Alzheimer's &Dementia, EarlyView.
Abstract INTRODUCTION Human tau protein, composed of six brain‐specific isoforms, is a major driver of Alzheimer's disease (AD). The role of its isoforms however remains unclear and human AD models are scarce. METHODS We generated human MAPT– (tau–) knockout (KO) induced pluripotent stem cells (iPSC) using CRISPR/Cas9, differentiated these into ...
Sarah Buchholz, Mohamed Aghyad Al Kabbani, Michael Bell‐Simons, Lena Kluge, Cagla Cagmak, Jennifer Klimek, Natja Haag, Lukas C. Iohan, Audrey Coulon, Marcos R. Costa, Devrim Kilinc, Hans Zempel   +11 more
wiley   +1 more source