Editorial Material
Cell Biology
Yoseop Yoon, Yongsheng Shi
Summary: In this article, two independent studies successfully reconstituted the processing of human pre-mRNA 3' ends using defined components in vitro. These studies are of great importance for understanding the nature and essential components of this biological process.
GENES & DEVELOPMENT
(2022)
Article
Plant Sciences
Zhu Zhang, Wen-qing Chen, Shi-qing Zhang, Jing-xuan Bai, Bin Liu, Ken Kin-Lam Yung, Joshua Ka-Shun Ko
Summary: The study revealed that isoliquiritigenin (ISL) inhibited the progression of pancreatic cancer by blocking autophagy through the p38 MAPK signaling pathway.
Article
Cell Biology
Moritz Schmidt, Florian Kluge, Felix Sandmeir, Uwe Kuehn, Peter Schaefer, Christian Tueting, Christian Ihling, Elena Conti, Elmar Wahle
Summary: In this study, the endonucleolytic cleavage of eukaryotic mRNA 3' ends followed by polyadenylation was reconstituted using overproduced and purified proteins. A minimal list of 14 essential polypeptides and 2 stimulatory polypeptides for RNA processing were identified. Key findings include the stimulation of cleavage by cleavage factor I and the essential requirement of RBBP6 in contacting and activating the endonuclease CPSF73.
GENES & DEVELOPMENT
(2022)
Article
Biochemistry & Molecular Biology
Ming-Fang Wu, Yen-Hsiang Huang, Ling-Yen Chiu, Shur-Hueih Cherng, Gwo-Tarng Sheu, Tsung-Ying Yang
Summary: Curcumin induces apoptosis in chemoresistant lung cancer cells through generation of ROS, and p38 MAPK is identified as a crucial signaling pathway for this process.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Cell Biology
Vytaute Boreikaite, Thomas S. Elliott, Jason W. Chin, Lori A. Passmore
Summary: In this study, the researchers reconstituted the 3' endonuclease activity of human CPSF and identified the protein factors required for this activity. They found that the activation and site-specific pre-mRNA cleavage by CPSF are tightly controlled. The results suggest that fidelity in mRNA processing is maintained through precise regulation of CPSF activity.
GENES & DEVELOPMENT
(2022)
Article
Cell Biology
Ananthanarayanan Kumar, Conny W. H. Yu, Juan B. Rodriguez-Molina, Xiao-Han Li, Stefan M. V. Freund, Lori A. Passmore
Summary: The translation provided describes a detailed study of the essential subunit Fip1 in the CPF/CPSF multiprotein complex, revealing the importance of its dynamics in coordinating cleavage and polyadenylation processes at the 3' end.
GENES & DEVELOPMENT
(2021)
Article
Multidisciplinary Sciences
Nehemiah Cox, Lucile Crozet, Inge R. Holtman, Pierre-Louis Loyher, Tomi Lazarov, Jessica B. White, Elvira Mass, E. Richard Stanley, Olivier Elemento, Christopher K. Glass, Frederic Geissmann
Summary: This study identified a macrophage-dependent mechanism involving the PDGFcc ortholog that controls lipid storage in adipose tissues of mice. Production of PDGFcc is regulated by diet and blocking PDGFcc leads to redirection of excess lipids toward thermogenesis in brown fat.
Article
Biochemistry & Molecular Biology
Rym Sfaxi, Biswendu Biswas, Galina Boldina, Mandy Cadix, Nicolas Servant, Huimin Chen, Daniel R. Larson, Martin Dutertre, Caroline Robert, Stephan Vagner
Summary: The recognition of polyadenylation signals (PAS) in eukaryotic pre-mRNAs is usually coupled to transcription termination, occurring while pre-mRNA is chromatin-bound. However, for some pre-mRNAs, this 3'-end processing occurs post-transcriptionally, i.e., through a co-transcriptional cleavage (CoTC) event downstream of the PAS, leading to chromatin release and subsequent PAS cleavage in the nucleoplasm. These findings indicate that CoTC-type cleavage of pre-mRNAs, followed by PAS cleavage in the nucleoplasm, allows certain pre-mRNAs to escape 3'-end processing inhibition in response to UV-induced DNA damage.
Article
Biochemistry & Molecular Biology
Olivia Molinar-Inglis, Jacob M. Wozniak, Neil J. Grimsey, Lennis B. Orduna-Castillo, Norton Cheng, Ying Lin, Monica L. Gonzalez Ramirez, Cierra A. Birch, John D. Lapek, David J. Gonzalez, JoAnn Trejo
Summary: This study identified candidate proteins regulated by PAR1-p38 signaling that may play important roles in endothelial dysfunction, by analyzing the global phosphoproteome in human cultured endothelial cells.
JOURNAL OF BIOLOGICAL CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Daniel Heller-Trulli, Huiyun Liu, Srimoyee Mukherjee, Claire L. L. Moore
Summary: This study reveals the important role of Ube3d in cellular differentiation and its effect on mRNA processing. Knockout of Ube3d inhibits the differentiation of 3T3-L1 cells into mature adipocytes and leads to global changes in mRNA levels. Overexpression of UBE3D or CPSF73 can rescue the differentiation defect and partially restore protein levels.
MOLECULAR AND CELLULAR BIOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Yin Shi, Shengfeng Xu, Natalie Y. L. Ngoi, Qi Zeng, Zu Ye
Summary: Hypoxia in the tumor microenvironment, causing excessive ROS and genomic instability, is a hallmark of cancer contributing to self-renewal, metastasis, and therapy resistance. PRL-3, an oncoprotein, has been found to regulate apoptosis resistance by negatively affecting p38 MAPK activity in response to hypoxia stress.
FREE RADICAL BIOLOGY AND MEDICINE
(2021)
Article
Immunology
Sara Francisco, Alicia Arranz, Javier Merino, Carmen Punzon, Rosario Perona, Manuel Fresno
Summary: The study found that TLR2 ligands activate MAPKs p38 and ERK earlier in macrophages, leading to higher levels of IL-10/IL-12 and IL-10/TNF-alpha ratios compared to TLR4 ligand LPS. Early TLR2-mediated p38 induction contributes to high IL-10 production, likely suppressing host Th1 response against certain pathogens.
FRONTIERS IN IMMUNOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Juan B. Rodriguez-Molina, Francis J. O'Reilly, Holly Fagarasan, Eleanor Sheekey, Sarah Maslen, J. Mark Skehel, Juri Rappsilber, Lori A. Passmore
Summary: In this study, it was found that the Mpe1 subunit directly interacts with the polyadenylation signal sequence and promotes the activity of CPF, controlling polyadenylation. The Cft2 subunit of CPF antagonizes the stable configuration of Mpe1. The depletion or mutation of Mpe1 leads to widespread transcription termination defects and interference with neighboring genes.
Article
Pharmacology & Pharmacy
Wei Yang, Jiaqi Su, Mingjing Li, Tiantian Li, Xu Wang, Mingdong Zhao, Xuemei Hu
Summary: Myricetin inhibits the proliferation of HCC cells by downregulating MARCH1 and affecting the p38 MAPK and Stat3 signaling pathways, ultimately suppressing HCC growth. This natural flavonol also induces autophagy and cell cycle arrest in HCC cells, demonstrating its anticancer properties.
FRONTIERS IN PHARMACOLOGY
(2021)
Article
Cell Biology
Zhangming Chen, Zhe Jiang, Lei Meng, Ye Wang, Minggui Lin, Zhijian Wei, Wenxiu Han, Songcheng Ying, Aman Xu
Summary: SAMHD1 inhibits the proliferation of gastric cancer cells by negatively regulating the activation of MAPK p38 signaling pathway, and is upregulated by KLF4.
Review
Genetics & Heredity
Fatima Gebauer, Thomas Schwarzl, Juan Valcarcel, Matthias W. Hentze
Summary: RNA-binding proteins (RBPs) are key effectors of gene expression, and their malfunction leads to various diseases. RBPs play important roles in human genetic disorders, with emerging therapeutic interventions targeting RBPs.
NATURE REVIEWS GENETICS
(2021)
Article
Cell Biology
Eva Riechert, Vivien Kmietczyk, Frank Stein, Thomas Schwarzl, Thileepan Sekaran, Lonny Juergensen, Verena Kamuf-Schenk, Eshita Varma, Christoph Hofmann, Mandy Rettel, Kira Guer, Julie Oelschlaeger, Friederike Kuehl, Judit Martin, Marta Ramirez-Pedraza, Mercedes Fernandez, Shirin Doroudgar, Raul Mendez, Hugo A. Katus, Matthias W. Hentze, Mirko Voelkers
Summary: RNA-binding proteins (RBPs) play a critical role in controlling cardiomyocyte function, and the cytoplasmic polyadenylation element-binding protein 4 (Cpeb4) is identified as a key regulator of cardiac growth and remodeling by differential binding to specific mRNAs. This study reveals a system-wide view of active RBPs in cardiomyocytes during growth response, shedding light on their role in regulating cardiomyocyte function.
Article
Immunology
Benjamin W. Dorschner, Ralf Wiedemuth, Ann-Christin Funke, Marc Gentzel, Mary-Louise Rogers, Sebastian Brenner, Sebastian Thieme
Summary: This study introduces a comprehensive workflow and an optimized IP protocol for investigating neurotrophin receptor p75NTR at endogenous, low abundance levels, providing detailed instructions from lysate preparation to successful detection of protein-protein interactions.By utilizing human melanoma cell line A375 and human leukemic plasmacytoid dendritic cell line PMDC05, specific antibodies and IP conditions were validated, revealing 14-3-3 epsilon:p75NTR interactions.
FRONTIERS IN IMMUNOLOGY
(2021)
Article
Genetics & Heredity
Sabine Muth, Annekatrin Klaric, Markus Radsak, Hansjoerg Schild, Hans Christian Probst
Summary: Treg-expressed CD27 maintains DC tolerogenic in steady state and limits anti-tumor immunity; Ablation of Treg-expressed CD27 synergizes with PD-1 blockade to improve CTL-mediated tumor control.
JOURNAL OF MOLECULAR MEDICINE-JMM
(2022)
Article
Hematology
Lena Muckenthaler, Oriana Marques, Silvia Colucci, Joachim Kunz, Piotr Fabrowski, Thomas Bast, Sandro Altamura, Britta Hochsmann, Hubert Schrezenmeier, Monika Langlotz, Paulina Richter-Pechanska, Tobias Rausch, Nicole Hofmeister-Mielke, Nikolas Gunkel, Matthias W. Hentze, Andreas E. Kulozik, Martina U. Muckenthaler
Article
Plant Sciences
Alastair W. Skeffington, Marc Gentzel, Andre Ohara, Alexander Milentyev, Christoph Heintze, Lorenz Boettcher, Stefan Goerlich, Andrej Shevchenko, Nicole Poulsen, Nils Kroeger
Summary: This study extracted silica proteins from three diatom species and found that there were no common proteins among them, and most proteins showed low similarity in sequence alignments. Bioinformatic analysis grouped these proteins into different classes based on unconventional sequence motifs, but their functions are still unclear. In vivo localization results of selected proteins suggest that proteins lacking sequence homology but sharing unconventional sequence motifs may have similar functions in diatom silica cell wall morphogenesis.
Article
Biochemistry & Molecular Biology
Magdalena Buescher, Rastislav Horos, Ina Huppertz, Kevin Haubrich, Nikolay Dobrev, Florence Baudin, Janosch Hennig, Matthias W. Hentze
Summary: This study reveals the mechanism by which vault RNA1-1 inhibits the oligomerization of p62 through biochemical and functional experiments. The PB1 domain and adjacent linker region of p62 (aa 1-122) are identified as critical for specific binding with vault RNA1-1, and lysine 7 and arginine 21 are identified as key hinges for p62 riboregulation. Additionally, chemical structure probing of vault RNA1-1 identifies a central flexible loop that is required for the specific interaction with p62.
Article
Biochemistry & Molecular Biology
Ina Huppertz, Joel I. Perez-Perri, Panagiotis Mantas, Thileepan Sekaran, Thomas Schwarzl, Francesco Russo, Dunja Ferring-Appel, Zuzana Koskova, Lyudmila Dimitrova-Paternoga, Eleni Kafkia, Janosch Hennig, Pierre A. Neveu, Kiran Patil, Matthias W. Hentze
Summary: The study reveals acetylation-driven riboregulation of ENO1 as a physiological mechanism of glycolytic control and stem cell differentiation regulation, providing new insights into the differentiation of stem cell metabolism and fate trajectories.
Article
Dermatology
Cinthia Silva-Vilches, Vanessa Bolduan, Mohamad Alabdullah, Kerstin Steinbrink, Hans Christian Probst, Alexander Enk, Karsten Mahnke
Summary: Ado receptor agonists applied topically to the skin can reduce swelling and activation of T cells during contact hypersensitivity reactions. In lymph nodes, the treatment with CGS leads to increased numbers of T cells expressing anergic markers. After sensitization, the Ado receptor agonists also reduce the production of proinflammatory cytokines and chemokines in ear tissue, as well as the infiltration of neutrophils.
JOURNAL OF INVESTIGATIVE DERMATOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Claudio Asencio, Thomas Schwarzl, Sudeep Sahadevan, Matthias W. Hentze
Summary: Small noncoding RNAs play important roles in cellular and organismal biology, working with RNA-binding proteins (RBPs). In order to specifically identify RBPs binding to small noncoding RNAs, a method called small noncoding RNA interactome capture (snRIC(2C)) was developed. Through this method, nearly 300 proteins that specifically bind to RNAs smaller than 200 nt in length (snRBPs) were identified, revealing differences from the total RNA-binding proteome. Further analysis showed that most glycolytic enzymes from yeast are snRBPs, and tRNA engagement of the glycolytic enzyme GAPDH is carbon source-dependent and regulated by the RNA polymerase III repressor Maf1, suggesting a regulatory interaction between glycolysis and RNA polymerase III activity. This study demonstrates the effectiveness of snRIC(2C) and other 2C-derived methods in studying RBPs and uncovering previously unrecognized interactions.
Article
Multidisciplinary Sciences
Joel I. Perez-Perri, Dunja Ferring-Appel, Ina Huppertz, Thomas Schwarzl, Sudeep Sahadevan, Frank Stein, Mandy Rettel, Bruno Galy, Matthias W. Hentze
Summary: The eRIC method was used to characterize the RNA-bound proteomes of three different mouse organs, revealing over 1300 active RNA-binding proteins, with nearly a quarter being previously unknown. Systematic differences in RNA binding were also observed between organs and cultured cells.
NATURE COMMUNICATIONS
(2023)
Article
Cardiac & Cardiovascular Systems
Eshita Varma, Jana Burghaus, Thomas Schwarzl, Thileepan Sekaran, Parul Gupta, Agnieszka A. Gorska, Christoph Hofmann, Claudia Stroh, Lonny Juergensen, Verena Kamuf-Schenk, Xue Li, Rebekka Medert, Florian Leuschner, Vivien Kmietczyk, Marc Freichel, Hugo A. Katus, Matthias W. Hentze, Norbert Frey, Mirko Voelkers
Summary: RNA-protein interactions are important for cardiac function, but the regulation of individual RNA-binding proteins through signaling cascades during heart failure development is not well understood. The study found that mTOR signaling is linked to the upregulation of the RNA-binding protein Ybx1, which is involved in cardiac hypertrophy by regulating protein synthesis. The depletion of Ybx1 preserved heart function during pathological cardiac hypertrophy.
BASIC RESEARCH IN CARDIOLOGY
(2023)
Article
Biochemical Research Methods
Sudeep Sahadevan, Thileepan Sekaran, Nadia Ashaf, Marko Fritz, Matthias W. Hentze, Wolfgang Huber, Thomas Schwarzl
Summary: Transcriptome-wide detection of binding sites of RNA-binding proteins can be achieved using Individual-nucleotide crosslinking and immunoprecipitation (iCLIP) and its derivative enhanced CLIP (eCLIP) sequencing methods. The python package htseq-clip is introduced for preprocessing, extracting, and summarizing crosslink site counts from i/eCLIP experimental data. The package provides crosslink site count matrices and other metrics for filtering and downstream analyses, such as the identification of differential binding sites.
Article
Biochemistry & Molecular Biology
Thomas Schwarzl, Sudeep Sahadevan, Benjamin Lang, Milad Miladi, Rolf Backofen, Wolfgang Huber, Matthias W. Hentze, Gian Gaetano Tartaglia
Summary: Enhanced crosslinking and immunoprecipitation sequencing (eCLIP-seq) is a method for detecting RNA-binding protein binding sites. However, current analysis strategies have low replication and high false positive rates. DEWSeq, a R/Bioconductor package, improves the detection of binding regions by utilizing replicate information and size-matched input controls. It has been shown to significantly increase the number and quality of binding sites.
NUCLEIC ACIDS RESEARCH
(2023)
Letter
Hematology
Silvia Colucci, Sandro Altamura, Oriana Marques, Katja Muedder, Anand R. Agarvas, Matthias W. Hentze, Martina U. Muckenthaler