Biochemistry & Molecular Biology

Article Biochemical Research Methods

A transmembrane scaffold from CD20 helps recombinant expression of a chimeric claudin 18.2 in an in vitro coupled transcription and translation system

Yao Wang, Shaoting Weng, Yajie Tang, Sen Lin, Xiayue Liu, Wenhui Zhang, Gang Liu, Boomi Pandi, Yinrong Wu, Lei Ma, Lin Wang

Summary: In this study, a high yield of recombinant CD20 and claudin 18.2 proteins was achieved using an in vitro coupled transcription-translation system. The results showed that rituximab has a high affinity with CD20 protein. This study provides a novel concept for promoting the expression of multi-pass transmembrane proteins and lays the foundation for large-scale industrial production of membrane-associated drug targets.

PROTEIN EXPRESSION AND PURIFICATION (2024)

Article Biochemistry & Molecular Biology

Genomic insights and prognostic significance of novel biomarkers in pancreatic ductal adenocarcinoma: A comprehensive analysis

Yuling Chen, Anle Huang, Yuanjie Bi, Wei Wei, Yongsheng Huang, Yuanchun Ye

Summary: This study screens genes associated with prognosis in pancreatic cancer and constructs a scoring system. Six genes strongly associated with pancreatic cancer prognosis are identified, and the diagnostic value of the scoring system is evaluated. Functional enrichment analysis reveals significant differences in immune-related functions between high- and low-risk groups. Single-cell RNA sequencing analysis further enriches our understanding of pancreatic cancer.

BIOCHEMISTRY AND BIOPHYSICS REPORTS (2024)

Article Biochemistry & Molecular Biology

Comparative transcriptome analysis reveals growth and molecular pathway of body color regulation in turbot (Scophthalmus maximus) exposed to different light spectrum

Lele Wu, Wen Sun, Jiale Zhou, Yaolin Li, Jun Li, Zongcheng Song, Changbin Song, Shihong Xu, Xinlu Yue, Xian Li

Summary: The study finds that red light induces dichromatic skin pigmentation in turbot juveniles, with some individuals displaying black coloration and others displaying lighter skin. The upregulated gene expressions related to melanin synthesis and the involvement of the nervous system in spectral environment-driven color regulation are both crucial factors.

COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY D-GENOMICS & PROTEOMICS (2024)

Article Biochemistry & Molecular Biology

Host proteins Alpha-2-Macroglobulin and LRP1 associate with Chandipura virus

Dhritiman Dey, Adhiraj Dasgupta, Dipanjan Ghosh, Oindrila Bhattacharjee, Abhrajyoti Ghosh, Ayae Honda, Dhrubajyoti Chattopadhyay

Summary: This study successfully identified host factors that interact with Chandipura Virus (CHPV) and play a critical role in infection, including A2M, LRP1, and GRP78. Knocking out A2M has a severe effect on viral infection, indicating the potential role of these host proteins in viral entry into host cells.

BIOCHIMIE (2024)

Article Biochemistry & Molecular Biology

A poly-histidine motif of HOXA1 is involved in regulatory interactions with cysteine-rich proteins

Damien Marchese, Florent Guislain, Tamara Pringels, Laure Bridoux

Summary: Homopolymeric amino acid repeats are common in human proteins, particularly in transcription factors and kinases. This study focuses on homopolymeric histidine repeats (polyH) and their role in regulating embryonic development. Through bioinformatic analysis, the study identifies that polyH-containing proteins interact with cysteine-rich proteins and proteins containing cysteine repeats. The study further investigates the HOXA1 protein, a transcription factor with a long polyH motif, and finds that the polyH motif is necessary for its interaction with cysteine-rich proteins. Additionally, the study discovers that metal ions are required for the HOXA1-MDFI interaction and identifies three polyH interactors that down-regulate the transcriptional activity of HOXA1.

BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS (2024)

Article Biochemical Research Methods

Three-state dynamics of zinc(II) complexes yielding significant antidiabetic targets

Nousheen Parvaiz, Asma Abro, Syed Sikander Azam

Summary: Protein Tyrosine Phosphatase 1B (PTP1B) is a negative regulator of insulin signaling pathways and has potential as a medicinal target. This study explores the binding and conformational orientation of zinc(II) complexes in PTP1B using advanced computational methods. The findings suggest that zinc(II) complexes can bind to important residues in the enzyme and inhibit its activity.

JOURNAL OF MOLECULAR GRAPHICS & MODELLING (2024)

Article Biochemistry & Molecular Biology

Transcriptional regulation of the Japanese flounder Cu,Zn-SOD (Jfsod1) gene in RAW264.7 cells during oxidative stress caused by causative bacteria of edwardsiellosis

Xiao-Mi Sun, Asami Yoshida, Takuya Ishii, Yan-Rong Jiang, Yi-Li Gao, Mikinori Ueno, Katsuya Hirasaka, Kiyoshi Osatomi

Summary: This study found that infection with the causative bacteria of edwardsiellosis, Edwardsiella tarda NUF251, leads to the production of superoxide radicals, causing oxidative stress. The research on the Jfsod1 gene suggests that the transcription factor NF-IL6 plays a significant role in upregulating the transcriptional activity of the gene in response to oxidative stress induced by NUF251 infection.

BIOCHIMIE (2024)

Article Biochemistry & Molecular Biology

Functional involvement of a conserved motif in the middle region of the human ribosomal protein eL42 in translation

Konstantin N. Bulygin, Alexey A. Malygin, Dmitri M. Graifer

Summary: This study reveals that specific amino acid residues of ribosomal protein eL42 play a critical role in the translation process of human cells, particularly in the step of deacylated tRNA dissociation from the E site.

BIOCHIMIE (2024)

Article Biochemical Research Methods

Fragment databases from screened ligands for drug discovery (FDSL-DD)

Jerica Wilson, Bahrad A. Sokhansanj, Wei Chuen Chong, Rohan Chandraghatgi, Gail L. Rosen, Hai-Feng Ji

Summary: Fragment-based drug design is a computer-aided drug discovery method, however, it has limitations in processing time and success rate. In this study, a new method called Fragment Databases from Screened Ligands Drug Design (FDSL-DD) was proposed, which intelligently incorporates fragment characteristics into the drug design process to improve the binding affinity between drugs and protein targets.

JOURNAL OF MOLECULAR GRAPHICS & MODELLING (2024)

Article Biochemistry & Molecular Biology

Gastrointestinal dysbiosis induced by Nocardia sp. infection in tilapia

Diana Medina-Felix, Francisco Vargas-Albores, Estefania Garibay-Valdez, Luis Rafael Martinez-Cordova, Marcel Martinez-Porchas

Summary: In this research, the effects of Nocardia infection on fish gastrointestinal microbiota were analyzed. It was found that the infection led to decreased survival rate, severe damage to the stomach microbiota, and a significant increase in Proteobacteria. A negative correlation network between Proteobacteria and other important phyla was observed. Therefore, Nocardia sp. is an emerging pathogen capable of inducing dysbiosis and causing significant mortalities.

COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY D-GENOMICS & PROTEOMICS (2024)

Article Biochemical Research Methods

α-Conotoxin recombinant protein ImI-AFP3 efficiently inhibits the growth and migration of lung cancer cells

Xiaobing Chen, Zijuan Zou, Wei Li, Xu Dong, Yi Chen, Yan Lu, Mingyue Zhu, Mengsen Li, Bo Lin

Summary: In this study, the fusion protein ImI-AFP3, composed of alpha-Conotoxin ImI and human alpha fetoprotein domain 3 (AFP3), was found to inhibit the growth and migration of lung cancer cells and showed synergistic effects with the drug gefitinib. These findings suggest that ImI-AFP3 is a promising candidate for the development of anticancer drugs.

PROTEIN EXPRESSION AND PURIFICATION (2024)

Article Biochemical Research Methods

Cytoplasmic production of Fabs in chemically defined media in fed-batch fermentation

Angel Castillo-Corujo, Mirva J. Saaranen, Lloyd W. Ruddock

Summary: This study successfully expressed two Fabs antibodies in the cytoplasm of E. coli using the CyDisCo system, achieving high yields and biological activity under industrially relevant fermentation conditions.

PROTEIN EXPRESSION AND PURIFICATION (2024)

Article Biochemical Research Methods

Multiscale modeling of nanoindentation and nanoscratching by generalized particle method

M. Chamani, G. H. Farrahi

Summary: This paper employs the Generalized Particle (GP) method to simulate nanoindentation and nanoscratching, showing that this method maintains consistent atomic properties across different scales and achieves results consistent with full atomic simulations.

JOURNAL OF MOLECULAR GRAPHICS & MODELLING (2024)

Article Biochemistry & Molecular Biology

Human muscle cells sensitivity to chikungunya virus infection relies on their glycolysis activity and differentiation stage

M. Jaquet, M. Bengue, K. Lambert, G. Carnac, D. Misse, C. Bisbal

Summary: Changes to our environment have led to the emergence of human pathogens such as chikungunya virus, which is now a major public health concern. In this study, the interconnection between skeletal muscle cells metabolism, their differentiation stage, and the infectivity of chikungunya virus was investigated. The results showed that chikungunya virus infectivity is dependent on cell differentiation and metabolism and that the virus interferes with cellular metabolism.

BIOCHIMIE (2024)

Article Biochemistry & Molecular Biology

Antiplatelet mechanism of a subtilisin-like serine protease from Solanum tuberosum (StSBTc-3)

Alfonso Pepe, Florencia Rocio Tito, Maria Gabriela Guevara

Summary: The study aims to characterize the antiplatelet activity of StSBTc-3 and provide insights into its mechanism of action. The results demonstrate that StSBTc-3 inhibits platelet aggregation and clot retraction, possibly through its binding to a2b133 integrin.

BIOCHIMIE (2024)

Article Biochemistry & Molecular Biology

The amyloid-β peptide: Guilty as charged?

M. Paul Murphy, Valeria A. Buzinova, Carrie E. Johnson

Summary: Progress has been made in the treatment of Alzheimer's disease through the development of anti-A beta therapeutics, which have shown modest efficacy in slowing the progression of the disease. However, the puzzling issue remains as to why completely removing A beta does not fully stop the disease.

BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR BASIS OF DISEASE (2024)

Article Biochemistry & Molecular Biology

Protective effects of SSRI, Citalopram in mutant APP and mutant Tau expressed dorsal raphe neurons in Alzheimer's disease

Neha Sawant, Sudhir Kshirsagar, P. Hemachandra Reddy, Arubala P. Reddy

Summary: Depression is a common neuropsychiatric comorbidity in Alzheimer's disease (AD) and other Tauopathies. Selective serotonin reuptake inhibitor (SSRI) treatment, such as Citalopram, not only has anti-depressive and anxiolytic effects, but also helps improve neurogenesis, reduce amyloid burden & Tau pathologies, and neuroinflammation in AD. In this study, Citalopram was found to reduce pathologically pTau level, increase synaptic gene expression and cytoskeletal structure, as well as improve cell survival, mitochondrial respiration, and mitochondrial morphology in cells expressing mutant APP and Tau. These findings suggest that Citalopram could be a promising therapeutic drug for treating depression and AD.

BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR BASIS OF DISEASE (2024)

Article Biochemistry & Molecular Biology

Unraveling the kinetics and pharmacology of human PepT1 using solid supported membrane-based electrophysiology

Alexander Koerner, Andre Bazzone, Maximilian Wichert, Maria Barthmes, Srujan Kumar Dondapati, Niels Fertig, Stefan Kubick

Summary: In this study, the human Peptide Transporter 1 (hPepT1) and its interactions with various substrates were comprehensively studied using solid supported membrane-based electrophysiology (SSME). The pH dependence of hPepT1 activity was observed, and the K-M and relative V-max values of different substrates were determined. Specific inhibition of hPepT1 by various inhibitors was also evaluated in a high throughput format.

BIOELECTROCHEMISTRY (2024)

Article Biochemistry & Molecular Biology

Angiogenesis inhibitor or aggressiveness marker? The function of endostatin in cancer through electrochemical biosensing

Sandra Tejerina-Miranda, Maria Pedrero, Marina Blazquez-Garcia, Veronica Serafin, Ana Montero-Calle, Maria Garranzo-Asensio, A. Julio Reviejo, Jose M. Pingarron, Rodrigo Barderas, Susana Campuzano

Summary: This study developed the first electrochemical bioplatform for determining human endostatin, which shows high sensitivity and selectivity for diagnosing tumors and identifying patients in different stages.

BIOELECTROCHEMISTRY (2024)

Article Biochemistry & Molecular Biology

Kinetic modeling of 2e-/1H+and 2e-/2H+bidirectional catalytic cycles

Andrea Fasano, Vincent Fourmond, Christophe Leger

Summary: This article focuses on the electrochemical response when a redox enzyme or synthetic catalyst is interfaced with an electrode, and the relation to the catalytic cycle and properties of the catalytic intermediates. The concept of catalytic pKa is introduced, and understanding and tuning catalytic potentials are crucial for the design of reversible catalysts that operate at a fast rate in response to even a small overpotential.

BIOELECTROCHEMISTRY (2024)