Articles tagged with Eukaryotic Cells
A new study supports the idea that hydrogen played a crucial role in the emergence of eukaryotes, the first nucleated cells. The research suggests that the Lokiarchaeota, an enigmatic group of microorganisms, use hydrogen for metabolism, providing evidence for the 'hydrogen hypothesis' of eukaryote evolution.
Researchers discovered eight SDHI pesticide molecules harming earthworms, bees, and human cells by blocking succinate dehydrogenase activity. The study found these pesticides induce oxidative stress in human cells, leading to cell death, threatening human health.
A new study by Yale scientists identifies ancient prokaryotes with compartmentalized nuclei, shedding light on the origin of eukaryotic cells. They found ribosomal proteins in Archaea with NLS-motifs similar to those in eukaryotic species, suggesting a transitional phase.
A study published in The Plant Journal has provided new insights into the dynamics of metabolic processes in eukaryotic cells. By quantifying the subcellular distribution of proteins and metabolites, researchers have identified key regulatory mechanisms controlling plant metabolism.
Researchers at Karlsruhe Institute of Technology (KIT) have created a platform that combines chemical synthesis with biological high-throughput screening on a single chip, called chemBIOS. This allows for the simultaneous performance of 75 parallel reactions, reducing costs and increasing efficiency.
Researchers discovered asymmetrical nuclear pore complex outer ring structures in fission yeast, comprising only two types of Nups, with essential roles in normal cell growth. The findings challenge the long-held assumption that these structures are identical across eukaryotic cells.
Researchers have developed a new label-free imaging technique that reveals the dynamic movement of chromatin in eukaryotic cells just before cell death. The study found that cells experience a 'burst' of activity, known as cellular paroxysm, which is thought to play a role in the earliest stages of cell death.
Scientists at ASRC have created a new class of molecules showing potent anti-Zika activity and low toxicity towards animal cells. These compounds may become the basis for a Zika-specific therapeutic, with potential applications in treating other viruses and bacterial infections.
Scientists studying archaeal microorganisms discovered essential genes critical for their growth, which may hold clues to the origin of eukaryotic cells. The research also found that archaea have unique surface structures that provide protection, contradicting previous beliefs.
Researchers discovered genetic retroelements copying into and harming bacterial genomes, indicating a potential role in eukaryotic cell emergence. The study suggests an interplay between DNA repair mechanisms and retroelements may have driven evolutionary pressures.
Researchers identify new position of mitochondria by analyzing environmental sequencing data and reconstructed genomes of alphaproteobacteria. The findings suggest that mitochondria evolved from an ancestor that later gave rise to all recognized Alphaproteobacteria groups, contradicting previous theories.
Researchers found that tungsten oxide nanoparticles selectively target cancer cells while being harmless to healthy cells, opening up new therapeutic possibilities. The particles also exhibit strong antibacterial properties, making them a potential solution for wastewater purification.
Researchers have discovered a fluorescent dye that allows them to observe the life cycle of bacteria in real time, enabling the study of microorganisms in their natural environment. This method will help locate halophiles, ancient salt-loving organisms that thrive in extreme conditions and may hold clues to the origin of life on Earth.
A team of researchers at Colorado State University has found striking parallels between how archaeal and eukaryotic cells package and store their genetic material. The breakthrough study revealed that archaea and eukaryotes share a common mechanism to compact, organize and structure their genomes.
Researchers develop synthetic genes that function like NOR gates in electronics, allowing for large-scale digital information processing in living cells. This enables targeted therapies and efficient biofuel production.
A new study from Uppsala University identifies a group of microorganisms, Asgard archaea, that provide insights into the evolutionary transition from simple to complex cells. The discovery sheds light on how eukaryotic cells evolved their complexity and suggests a possible mechanism for this process.
Scientists found evidence that a metabolic oscillator acts as regulator of cell division, contradicting textbook description of cyclin-dependent kinase complex. The oscillator oscillates in synchrony with the cell cycle but can also occur independently.
Researchers discovered that cyanobacteria form compacted DNA structures transiently before cell division, similar to eukaryotes. The compacted DNA includes polyphosphate bodies that may regulate phosphate supply for DNA synthesis.
Researchers propose that eukaryotic life arose through a gradual transfer of molecular machinery from archaea to bacteria. The discovery of Lokiarchaeum's genome reveals a complex organization, sparking debate about the earliest stages of eukaryogenesis.
Entamoeba histolytica is a parasitic infection causing 50 million cases of amoebic dysentery each year and killing 50,000-100,000. Researchers aim to accelerate understanding of the parasite's metabolism by studying unusual enzymes that enable its survival.
Researchers discovered a eukaryote that lacks mitochondria and uses a cytosolic sulfur mobilization system to function. The organism, Monocercomonoides, is related to human pathogens and lives in low-oxygen environments.
A region of specific proteins called SPX domain signals the phosphate status to cells, regulating phosphate uptake. InsP signaling molecules interact with SPX domains to control phosphate homeostasis in various organisms.
Georgia State University biologist Ming-Hui Zou has received a four-year, $1.9 million NIH grant to study the role of AMPK in cellular energy balance and its relation to cardiovascular disease. His research aims to unravel the interplay between mitochondrial structure and function in the initiation of cardiovascular disease.
Researchers at the Centre for Genomic Regulation in Barcelona, Spain, have shed new light on the evolution of eukaryotic cells by studying mitochondrial acquisition. The study found that acquiring mitochondria occurred late in cell evolution, suggesting a crucial milestone in life's complexity.
Researchers found that if groups of targeted cells are large enough, the bacterial superweapon T6S can be thwarted. This allows protected interior cells to multiply quickly and replenish the group's numbers, making it impossible for the bacteria to take over. The study provides insight into how cells withstand powerful aggressors.
Researchers at Indiana University have calculated the lifetime energy requirements of multiple cell types and genes, revealing a linear relationship between energy consumption and cell volume. This study challenges existing theories on the role of mitochondria in driving genome complexity and evolution.
Researchers at The Wistar Institute have discovered how a specific variant of the condensin protein complex plays a crucial role in regulating DNA structure and promoting cellular senescence. This finding provides valuable insights into the anti-cancer activity of cells and could lead to the development of new therapies
A new study by Uppsala University researchers reveals a missing link in the evolution of complex life, identifying a new group of microorganisms called Lokiarchaeota. This discovery provides insights into how complex cell types emerged from simple microbes, challenging long-standing scientific questions.
Researchers have found evidence of a potential sixth DNA base, methyl-adenine (mA), in complex organisms including humans, algae and worms. This discovery could have significant implications for our understanding of epigenetics and gene regulation.
Scientists have identified a new chaperone protein, Acl4, that helps assemble ribosomal protein L4 into a developing ribosome. This discovery provides insights into the stepwise process of ribosome assembly and has potential applications in antifungal agents and disease research.
Researchers have successfully developed an atomic force microscopy system that can image structural dynamics of living neurons with high spatial and temporal resolution. The new system enables analysis of cell morphology changes with a resolution ~20-100 fold better than that of a standard light microscope.
A new theory suggests that eukaryotic cells arose from external bacterial infections, where blebs trapped mitochondria-like bacteria, leading to the formation of complex cell structures. This alternative view challenges the current theory and offers a radical rethinking of how complex life came to be.
The Baums' theory proposes that eukaryotic cells evolved through a process where internal structures formed outside the ancestral cell, eventually giving rise to the nucleus and other membrane compartments. This gradual path challenges existing theories and offers a new perspective on complex life evolution.
Guillardia theta's unique phycobiliproteins have distinct biosynthesis and assembly processes compared to cyanobacteria and red algae. Researchers gained insight into the complex transport mechanism of these pigments using docking enzyme GtCPES.
Researchers at Rockefeller University developed the first model system to understand the DNA 'replication fork' process in eukaryotic cells. This breakthrough enables scientists to study the molecular tools involved in cell division and may have significant implications for human disease research, particularly cancer.
Researchers have developed a novel technique to detect cell toxicity in real-time during drug screening, using DNA-binding fluorescent dyes. Four dyes were identified as safe and impermeable to cells, enabling the detection of cell death during high-throughput screening.
Researchers observed cyanobacteria assembling carboxysomes, vital cellular machinery for photosynthesis and carbon fixation, from the inside out. The findings illuminate bacterial physiology and may influence nanotechnology development.
A UCSF scientist suggests that complex gene expression mechanisms in humans may have evolved to counter viral infections, rather than for overall organism development. This idea challenges conventional wisdom about the evolution of eukaryotic cells.
Researchers identify unique properties of K11-linked polyubiquitin chains, suggesting new cellular processes involved in disease maintenance. These findings may lead to novel treatments for diseases like cancer and diabetes.
A Danish-British research team discovered a previously unknown third position in the calcium pump's on-off switch, enabling it to function at full speed when activated. This discovery improves our understanding of biological mechanisms and may lead to better treatment of diseases related to calcium balance.
Researchers at Brookhaven Lab used cryo-electron microscopy to visualize how protein machines bind to DNA strands, setting up for duplication. This study may lead to new ways to attack cancers by targeting the basic process of cell division.
Researchers successfully synthesized a large DNA molecule and applied a method to scramble its genetic code, yielding insights into DNA structure and trait expression. The achievement represents a significant step towards synthesizing entire eukaryote genomes.
Researchers at Caltech have obtained high-resolution images of a cell with a nucleus undergoing cell division, revealing a surprising twist in the process. The observations suggest that chromosomes may link together to form a bundle that can be segregated by a smaller number of microtubules.
Researchers at Max Planck Institute discovered a mechanism that allows cells to coordinate respiratory activity and degrade toxic oxygen radicals. This discovery may have significant implications for cancer research, as it could be used to target nutrition deficiency in tumour cells and render them more vulnerable.
Scientists discovered remarkably preserved remains of ancient organisms in Scottish lochs that lived a billion years ago. These fossils show complex algal cells with nucleus, mitochondria, and chloroplasts, indicating early evolution of photosynthesis and sexual reproduction.
Mitochondria power stations are crucial for complex cell evolution and innovation, enabling eukaryotes to accumulate more genes than bacteria. The tiny mitochondrial genome is essential for cell respiration, allowing cells to support a vast number of genes and proteins.
Scientists have obtained the closest look yet at how a gargantuan molecular machine breaks down unwanted proteins in cells, a critical housekeeping chore that helps prevent diseases such as cancer. The research provides valuable clues on how the enzyme, tripeptidyl peptidase II, keeps cells tidy and disease-free.
Five young Portuguese researchers have been awarded starting grants from the European Research Council to study the processes underlying cell division, ageing and adaptation. Their work has implications for understanding cancer, age-related syndromes and infertility.
Researchers found bacteria developed into complex cells earlier than thought, with mitochondria evolving around 2000 million years ago. The discovery transforms our understanding of cell evolution and the emergence of more complex life forms.
A new report reveals that a prion-like protein called CPEB may participate in memory in higher eukaryotes, including sea slugs. The protein's ability to switch between distinct conformational states suggests it could maintain stable states with unstable biological molecules.
Scientists at EMBL discovered membrane-coat proteins in bacteria from the PVC superphylum, which could aid in understanding eukaryotic cell evolution and structure. These findings provide molecular evidence that coat proteins shape eukaryotic endomembrane systems in prokaryotes.
Two studies suggest the nuclear envelope's permeability barrier reopens briefly after mitosis, allowing large proteins to enter the nucleus by passive diffusion. This dynamic process has important implications for cellular compartmentalization and genetic material regulation.
Prokaryotes can exchange genes and merge without losing their cell membranes, a process called endosymbiosis. UCLA molecular biologist James A. Lake discovered the first exclusively prokaryote endosymbiosis, which led to the evolution of double-membrane prokaryotes that produced oxygen through photosynthesis.
Researchers discover adenylylation, a unique post-translational modification, regulates cell signaling by inactivating key proteins. This discovery opens new avenues for exploring bacterial pathogenesis and potential therapeutic targets.
A Stanford researcher has quantified the enormous size jumps of life on Earth, finding two major leaps: one 1.6 billion years ago and another 600 million years ago. These increases were triggered by significant boosts in atmospheric oxygen levels, which enabled eukaryotic cells to develop and multi-cellularity to emerge.
Researchers at Yale University have discovered that the Legionella pneumophila bacterium uses Ank proteins to evade the immune system, allowing it to survive and cause disease. By understanding this mechanism, scientists hope to develop a vaccine targeting specific elements of the protein.
UC San Diego researchers have identified a novel protein called Atg30 that controls peroxisome degradation, a process linked to cell growth, aging, and homeostasis. The discovery allows scientists to control this aspect of cellular autophagy, potentially leading to new insights into aging, immunity, neurodegeneration, and cancer.
Researchers have identified the proteins forming the structure of carboxysome microcompartments, a key step in understanding their role in bacterial protection. The discovery may lead to new strategies for targeting these structures, potentially rendering bacteria harmless.
Researchers reveal an alternative transcriptional core promoter complex directs cell-type specific differentiation during myogenesis. This new level of control has significant implications for multi-cellular differentiation mechanisms.
Jan Löwe's groundbreaking research elucidated the structure and function of proteins involved in bacterial cell division, showcasing the complexity and sophistication of bacterial cells. His work highlights the importance of structural biology in understanding fundamental biological mechanisms.