Articles tagged with Ribosomes
Researchers at TSRI have determined the structure of Ltn1, a 'quality-control' protein that ensures protein-making machinery works smoothly. The study suggests Ltn1 may be relevant to human neurodegenerative diseases such as ALS.
The machine, inspired by natural ribosomes, can synthesize complex molecules in a synthetic process, with potential applications in pharmaceuticals and other industries. While still inefficient compared to natural ribosomes, the machine's development marks an important step towards more efficient manufacturing processes.
Researchers discovered a ribosomal protein, rpL40, that regulates viral protein synthesis and could represent a target for antiviral treatments. This finding reveals the ribosome's active role in regulating protein translation and offers new insights into combating fatal viral infections such as rabies.
Researchers discovered that RfaH protein can unfold and reform into a completely new structure, granting it an additional function. This remarkable ability has significant implications for gene expression control and protein structure studies.
Researchers have found that blocking a fundamental process deep within cancer cells can selectively kill them and spare normal cells. This discovery reveals that accelerated reading of ribosomal genes is responsible for causing abnormal nucleoli and is necessary for the survival of cancer cells.
Researchers have identified a crucial quality control mechanism in cell growth, ensuring proteins are produced correctly. The study sheds light on the assembly of ribosomes, complex machines inside cells responsible for producing proteins.
A new study reveals how cells exploit gene sequences to survive toxic attacks by rapidly producing proteins that counteract the harm. The research found that toxic stresses reprogram the tRNA modifications to divert the cell's protein-building machinery away from routine activities to emergency action.
Researchers develop new approach to designing antibiotics that target bacterial ribosomes without damaging hair cells, addressing ototoxicity. Apramycin shows promise against drug-resistant TB and other 'superbugs' without causing hearing loss.
Scientists at IDIBELL have found a new checkpoint in cell cycle control through the joint action of two proteins, RPL11 and RPL5, which disrupts ribosomal biogenesis. This leads to the activation of p53 protein and cell cycle arrest.
Researchers at UCSF find hidden genetic code layer influencing protein synthesis rates, even in 'silent' mutations. The discovery challenges long-held assumptions and may accelerate industrial protein production for biofuels and medicines.
Researchers at Hebrew University and University of Vienna reveal stress-induced protein synthesis machinery that induces bacterial cell death in E. coli. This discovery may lead to the design of improved, novel antibiotics effective against pathogenic bacteria.
Scientists from Scripps Research Institute have defined the structure of one of the cell's most basic engines required for cell growth. The study reveals a series of redundant mechanisms that assure production of critical cellular building blocks while avoiding missteps, which could lead to disease.
Researchers found that the lack of structure on messenger RNA facilitates protein synthesis, even without a Shine-Dalgarno sequence. The absence of secondary structures on these mRNAs makes it easier for ribosomes to access and identify the start codon.
Scientists at Berkeley Lab derived atomic-scale resolution structures of the ribosome, a protein-making machine. The high-resolution structures reveal molecular-scale compression springs and torsion springs made of RNA, keeping the subunits tethered together during large-scale motions.
A team of scientists at Karolinska Institutet has identified a key component in mitochondria's function, which combines with another protein to control ribosome formation and energy production. The discovery sheds light on the regulation mechanisms involved in inherited and age-related diseases.
Researchers at UCSF have discovered a novel way genes are expressed in different tissues throughout life, using a mutant mouse with extra ribs. This finding has broad implications for understanding developmental diseases and may lead to new cancer therapies.
Two studies provide the first detailed view of the chemical and mechanical interactions between the ribosome and membrane proteins. The researchers used cryo-electron microscopy to image the insertion process, revealing a
Researchers at the University of Illinois Chicago have discovered a signaling mechanism in the bacterial ribosome that detects proteins activating genes for antibiotic resistance. This mechanism may lead to the development of more effective antibiotics by understanding how signals are generated and transmitted within the ribosome.
A Scripps Research Institute scientist has discovered a molecular switch controlling protein synthesis in ribosomes, which could lead to potential treatments for cancer and other diseases. The study suggests that regulating this process may help prevent disease states such as Alzheimer's and diabetes.
Scientists at Einstein College of Medicine discovered that genes involved in building protein complexes are activated randomly, not coordinately. This unexpected finding may change the way scientists think about cellular processes and synchronization.
Researchers used the Encanto supercomputer to create molecular snapshots of the ribosomal subunits during protein synthesis. The study showed that head swivel motion plays a crucial role in facilitating translocation via intra-subunit tRNA hybrid sites, and a dynamic catalyst acts as a pawl in the ribosomal machinery.
A Scripps Research team has successfully imaged the formation of cells' protein factories using a novel technique. The breakthrough could lead to new antibiotic development and treatments for diseases tied to ribosome errors. The study offers insights into cellular processes and may uncover new targets for therapeutic interventions.
Scientists have characterized a general mechanism that controls transcription elongation in bacteria, revealing the active ribosome's role in adjusting transcriptional yield. This finding could lead to novel ways to interfere with bacterial gene expression and develop new antimicrobial therapies.
Researchers at the Salk Institute found that direct interactions between amino acids and nucleotide triplet anticodons helped establish matching pairs, leading to the modern genetic code. The study provides the first in vivo data shedding light on the origin and evolution of the genetic code.
Researchers found that lankacidin and lankamycin, two antibiotics produced by streptomyces, are more effective when used together against MRSA and other pathogens. The combination prevents protein assembly and inhibits bacterial growth, offering a new strategy for fighting antibiotic-resistant infections.
Researchers at Uppsala University shed light on ribosome function by detailing chemical reaction mechanisms, identifying key role of water molecules in catalysis. The findings suggest a few components induce the catalytic effect, with surrounding structure holding them in place.
The studies used molecular dynamics flexible fitting (MDFF) to examine the interaction of the ribosome with EF-Tu and SecY, respectively. The researchers found structural evidence that when the ribosome recognizes the correct tRNA, it induces a change in the shape of EF-Tu, allowing chemical interactions to lead to protein assembly.
Researchers at the University of Texas Medical Branch (UTMB) have identified a viral protein called nsp1 as a major contributor to SARS virus virulence. The protein interferes with host cell defenses by targeting ribosomes, which are responsible for producing proteins crucial for immune defense.
Researchers have visualized the ribosome's assembly line gears, capturing the intricate interactions between elongation factor G and the ribosome. The study reveals new insights into how EF-G moves the assembly line forward, paving the way for understanding viral hijacking and antibiotic resistance.
A genomic study has identified a plausible cause of colony collapse disorder in honey bees. The research found that the loss of ribosomal function, caused by viral infections and other stressors, contributes to the mysterious disappearance of American honey bees.
A study by Jeff Coller and his team reveals that messenger RNA (mRNA) is predominantly degraded on ribosomes, altering the common dogma of how gene expression is controlled within cells. This finding has significant implications for understanding genetic diseases linked to mRNA degradation.
Scientists have captured nanoscale movements of ribosomes, revealing a complex four-step ratcheting mechanism that interacts with mRNA and tRNA. This breakthrough could lead to more effective antibiotics and new treatments against devastating diseases like hepatitis C.
A team of researchers has uncovered the first step in the recycling of a crucial molecular tag that ensures correct gene expression. This mechanism, called nonsense-mediated decay (NMD), helps protect against genetic diseases such as thalassaemia and Duchenne's muscular dystrophy.
A team of scientists led by Dr. Michael Walter discovered that WDR36 gene variations affect cell function only when combined with changes in another gene, STI1. This finding explains why some people with WDR36 gene variations get glaucoma while others don't.
A new theory proposes that a universal molecular machine, the ribosome, self-assembled based on basic chemical principles. This breakthrough explains how such complex structures emerge in nature, shedding light on the origins of life on Earth.
Researchers developed a mathematical model to evaluate the efficiency of bacterial protein production, finding that optimal efficiency requires seven genes for ribosome production. The model accurately predicted how E. coli adapts to disruptions in production workflow.
Scientists at Johns Hopkins Medicine found that the ribosome recognizes and corrects errors during protein synthesis. The discovery reveals a critical 'proofreading step' in protein production, showcasing the cell's strict adherence to high-fidelity synthesis.
Researchers at Rockefeller University have developed a new method for identifying proteins that give a cell type its unique identity, offering a breakthrough in cellular analysis. This technique, translating ribosome affinity purification (TRAP), can distinguish between any type of cell in any tissue, with applications for research int...
A new ribosome study sheds light on the oldest branches of evolutionary life, suggesting that differences in ribosomal structure between bacteria and archaea are molecular fossils of early evolution. The research confirms and extends Carl Woese's early work on finding signs of evolution in the ribosome.
A team of researchers has observed the dynamic, ratchet-like movements of single ribosomal molecules in protein building, revealing a key mechanism for cell survival. The spontaneous back-and-forth rotation between subunits allows the ribosome to advance along messenger RNA as proteins are built.
Researchers have linked ribosomes and Gcn4 to the pathways related to dietary response and aging. The study found that mutations to the large ribosomal subunit led to increased lifespan, and treating cells with a drug specifically targeting the large subunits made them live longer.
Researchers at the University of Maryland have defined the difference between near-cognate and non-cognate codons in messenger RNA, enabling more accurate design of drug therapies. This discovery could lead to improved treatment options for diseases caused by mutations in genes.
Researchers at the University of Illinois Chicago have discovered how antibiotic linezolid inhibits bacterial growth. By binding to ribosomes, linezolid kills bacteria and disrupts protein synthesis. The study provides new insights into the mechanism of action and potential improvements for the drug.
Thomas Steitz received the 2007 Gairdner International Award for his work on the structure and function of the large subunit of the ribosome, which has led to a better understanding of human disease and the development of new antibiotics. His research has also highlighted the importance of basic discoveries in medical science.
Danish researchers have shed light on how viruses, like HIV and bird flu, trick human cells into producing proteins needed for replication. They developed optical tweezers to investigate the mechanical unfolding of pseudoknots, a crucial step in virus replication.
Researchers at the University of Illinois developed MultiSeq, a free software that analyzes sequence and structure data to investigate changes in proteins and nucleic acids. This allows scientists to gain insight into fundamental questions like the origin of life and develop resistance to antibiotics.
Recent breakthroughs have enabled researchers to construct an atom-by-atom model of the ribosome, a complex molecular machine responsible for synthesizing proteins. The high-resolution images reveal detailed interactions between the ribosome, messenger RNA, and transfer RNAs, providing new insights into protein synthesis.
The signal recognition particle (SRP) complex plays a crucial role in sorting secretory and membrane proteins, determining their final destination within or outside the cell. By understanding its structure, researchers can uncover key events during protein sorting, essential for expressing these proteins correctly.
A study led by Jennifer Doudna and Eva Nogales used cryo-EM to create a 3D model of the eIF3 protein complex, showing its structural mechanics in loading human or viral RNA onto ribosomes. This understanding could lead to new therapies for viral infections.
Scientists have captured high-resolution snapshots of the bacterial ribosome, allowing them to build more detailed models and gain insights into how specific antibiotics work. The new data reveals the ribosome's structure and function during protein manufacturing, including its ability to withstand stress and neutralize negative charge.
Researchers have discovered additional sites on ribosomes that could be targeted by antibiotics to combat bacterial resistance. The study provides new potential targets for pharmaceutical companies to create novel antibiotics, keeping pace with the evolving threat of antibiotic resistance.
A recent study has uncovered a natural quality control mechanism in cells that identifies and eliminates faulty messenger RNAs (mRNAs) containing premature stop codons, known as nonsense mutations. The mRNA-binding protein CBP80 plays a critical role in this process, allowing for the development of drug-based gene therapies to combat d...
Researchers found that the SXL protein blocks the synthesis of MSL-2 proteins in females by acting on two separate steps. This discovery reveals an entirely new mechanism for controlling protein dosages at the level of RNA, which could have implications for understanding diseases and animal development.
North and South American researchers have identified unusual structural features in the ribosome of Trypanosoma cruzi, a parasite responsible for Chagas disease. The discovery may lead to the development of targeted therapies without harming infected organisms.
Researchers challenge traditional model of mRNA translation with discovery of EF-G's binding to GDP and its role as a GTP exchange factor. The ribosome plays a dual role in guanine-nucleotide exchange and GTPase-activation, leading to partial translocation of the mRNA.
Scientists have made significant progress in understanding how bacteria develop resistance to antibiotics, including macrolides and lincosamides. The study revealed new details about the structural basis of drug resistance and identified potential targets for developing new hybrid antibiotics.
Scientists visualize bacterial ribosome recycling factor (RRF) structure using three-dimensional cryo-electron microscope, shedding light on its role in protein synthesis. RRF is a promising target for designing new antibiotics as it differs between eukaryotes and prokaryotes.
Researchers discovered a crucial protein, S14, that regulates ribosome assembly in yeast. The findings offer a potential target for designing drugs to interfere with the process.
Scientists have discovered that ribosomes' universally conserved nucleotides are not crucial for building proteins but instead aid in their release. The findings challenge long-held ideas about protein synthesis, suggesting a new model for the ribosome's function.
Ribosomes, critical sites of protein synthesis, speed up chemical transformation through entropic origin, not lowering energy barrier like conventional enzymes. This discovery helps scientists understand ribosome function and design inhibitors for protein synthesis.