Articles tagged with Nuclear Pores
Researchers discovered that the nuclear pore complex is a dynamic system with a ring-shaped scaffold surrounded by flexible FG domains. The complex's architecture and crowded environment work together to selectably allow transport receptors and their cargo to pass through.
Researchers unveiled an integrative experimental and computational map of macromolecular transport through nuclear pore complexes. The model identifies key design features that ensure NPC efficiency and resilience, revealing new avenues for medical innovation. It also provides insight into diseases like cancer, Alzheimer's, and ALS.
Cells dynamically adjust nuclear pore complexes like a retail store opening more checkout lines to regulate genome access. Research findings suggest that protein creation and disposal systems control the amount of NPCs in cells.
Researchers have discovered how a protein linked to the human immune system wards off HIV-1 and herpes simplex virus-1 by assembling structures in the cell that lure in viruses and trap them. This discovery offers new avenues for antiviral therapies and could be used to devise strategies to combat these viruses.
Researchers developed a high-speed modulation system combining digital display with super-resolution imaging, significantly improving lateral and axial resolution. This enables detailed study of subcellular structures in animal cells and plant ultrastructures, paving the way for future biological discoveries.
Researchers discover HIV uses its capsid to bypass cellular defenses and transport genetic material into the cell nucleus. The 'smart' FG phase of the nuclear envelope allows the capsid to slide through, concealing the genomic payload from anti-viral sensors.
Researchers at Kanazawa University found a link between nuclear pore complex alterations and glioblastoma. They demonstrated that NUP107 proteins overexpression degrades the function of p53, a crucial cancer-preventing protein. Further studies are needed to uncover the molecular pathways at play.
Researchers have discovered that nuclear pore IDPs form a dynamic barrier that allows essential cellular factors to pass while blocking viruses and pathogens. The team used synthetic biology, multidimensional fluorescence microscopy, and computer-based simulations to study IDPs in living cells.
Researchers found that adult heart cells have fewer communication pathways called nuclear pores, which may protect against harmful signals but prevent regeneration. This discovery sheds light on why adult hearts do not regenerate like newborn mice and human hearts.
Researchers have uncovered a unique mechanism by which the SV40 virus infects cells by exploiting the nuclear pore complex and LINC protein. This finding may provide insights into the mechanisms underlying cancer-causing pathogens and shed light on basic cell biology.
A new mechanism has been discovered for the passive transport of biomolecules through the nuclear pore complex, with implications for human diseases. The research team used supercomputing simulations on Frontera and Stampede2 systems to study the kinetics of the nuclear pore transport.
Using nearly two decades of research and ultrabright X-ray beams, scientists have created a detailed structural map of the nuclear pore complex (NPC), a key regulator of cellular operations. The results provide significant implications for understanding disease mechanisms and developing new treatments.
Researchers at the Kosinski Group used a combination of cryo-electron tomography, single particle cryo-EM, and integrative modelling to create the most complete model of the human NPC to date, covering over 90% of its core. This breakthrough enables scientists to understand the NPC's structure and function in greater detail.
A study has found that shuttle proteins form an escape-proof mechanism to fortify the nuclear pore and regulate transport of substances. The number of shuttle proteins occupying the pore depends on their concentrations, allowing cells to compensate for one protein's loss with another.
A new study reveals the sophisticated mechanism by which adenoviruses infect human cells and transfer foreign DNA into their nucleus. Protein V plays a crucial role in increasing the virus particle's stability and preventing premature DNA release, which triggers an anti-viral alarm system.
A study published in Science Translational Medicine identified a common cellular defect in ALS that can be treated with an antisense oligonucleotide drug. Researchers found that the accumulation of CHMP7 protein in the nucleus leads to nuclear pore injury and TDP-43 mislocalization, ultimately causing cell death.
ETH Zurich researchers use a novel method called KARMA to analyze protein complex assembly, revealing a hierarchical principle and durable scaffold. The technique allows for the reconstruction of precise assembly sequences, opening up new avenues for studying biological processes.
Researchers at Sanford Burnham Prebys Medical Discovery Institute have discovered a way to selectively kill aggressive cancer cells by blocking the construction of nuclear pore complexes. This breakthrough could lead to new treatments for deadly tumors such as melanoma, leukemia, and colorectal cancer.
Scientists study FG-NUPs in normal and colorectal cancer cells, finding altered conformational dynamics in cancer cells. The structure of the central plug is smaller, hindering filamentous features in cancer cells.
Researchers at the University of Basel have developed biocompatible polymer vesicles that can enter the cell nucleus, allowing for targeted drug delivery. The nanocontainers can be designed to transport therapeutic agents directly to the cell's control center.
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.
Mutations in the NUP160 gene are associated with steroid-resistant nephrotic syndrome, a kidney disease that does not respond to steroids. The study identified new genetic mutations and developed a functional study system to analyze human genes.
A study published in PLOS Pathogens reveals how the human myxovirus resistance 2 (MX2) protein blocks HIV-1 infection by inhibiting nuclear import of viral DNA. The findings suggest that TNPO1 and nucleoporins facilitate MX2 positioning at the nuclear envelope.
Salk researchers discover that manipulating nuclear pores can increase their numbers in healthy cells, mimicking those found in cancer cells. This breakthrough could lead to a new way to fight cancer by targeting nuclear pores.
Researchers have found that tau protein interferes with the nucleus's ability to communicate with the cell, disrupting the function of the nuclear pore complex. This alteration accelerates tau aggregation and neurofibrillary tangle formation, leading to neural dysfunction and death in Alzheimer's disease.
A new study by Sanford Burnham Prebys Medical Discovery Institute (SBP) researchers describes how nuclear pore component Nup210 is critical for the survival of circulating CD4+ T cells. The findings identify a new node of T cell receptor signaling and could pave the way for the development of future immunotherapies.
Researchers discovered a unique mechanism involving intrinsically disordered polypeptides in nuclear pore complexes that enable rapid recognition and binding of transport factors. This 'fuzzy' interaction allows for specific and speedy cell signaling, preventing DNA data breaches by viruses or faulty functioning.
A cellular traffic jam affects neurons in most ALS forms, with TDP-43 causing transport defects and disrupting protein import. A drug, KPT-335, may compensate for these disruptions, showing promise for treatment.
Researchers from the University of Seville have discovered that genes located near nuclear pores contribute to maintaining genome stability. The study found that anchoring DNA to the pore during transcription prevents DNA-RNA hybrids, a natural source of genome instability.
Scientists at the University of Basel report that shuttling proteins, known as importins, control nuclear pore function, rather than the other way around. Importin alpha and beta cooperate to open and close the pore like a revolving door.
Researchers at Kanazawa University have successfully imaged the dynamics of nuclear pores in colon cancer cells, revealing a new 'nano dying code' that could lead to novel treatments. The study uses high-speed Atomic Force Microscopy (HS-AFM) to visualize the structure and dynamics of nuclear membrane pores at the nanoscale.
A planctomycete bacterium has been found to contain internal membranes with nuclear pore-like structures, which share protein domains with eukaryotic nuclear pore complexes. This discovery may provide insight into the evolution of the cell nucleus and its membrane envelope.
For the first time, researchers have filmed 'living' nuclear pore complexes in action using an ultra-fast atomic force microscope. The study reveals the dynamic behavior of molecular 'tentacles' inside the pore, which regulate the transport of molecules into and out of the cell nucleus.
Researchers at EMBL have determined the structure of the nuclear pore complex's inner ring, a crucial component in controlling molecular traffic to the cell's nucleus. The discovery brings the nuclear pore into focus and holds potential implications for understanding its role in cancer and aging.
A research team has mapped the structure of a unique nuclear pore complex found in trypanosomes, an ancient parasite species diverged from yeast and humans. The study reveals that the architecture of the inner ring is similar across different eukaryotes, while the outer ring exhibits distinct features, suggesting an ancient origin.
Berkeley Lab scientists discovered specific amino acid arrangements in FG Nups proteins enable efficient transport of molecular cargo into and out of the nucleus. These findings have implications for understanding diseases like cancer and infectious disorders.
Researchers found that the most common genetic defect in ALS causes nuclear pore dysfunction, leading to cell death. This discovery empowers the search for genetic causes of sporadic ALS and offers new hope for treatment options.
Researchers found that treating astrocyte nucleus with TGF-beta frees p75NTR protein, allowing critical molecules to enter the nucleus and enabling reactive state. This discovery highlights the importance of nuclear pore complex in brain health and raises possibilities for treating neurological disorders.
Researchers have developed a new method to display the spatial structure of nuclear pores in high resolution. This has led to a better understanding of how certain molecules are transported into or out of the nucleus. The discovery sheds light on various diseases, including cancer, that involve defective transport through nuclear pores.
Rockefeller University scientists have uncovered crucial steps in the nuclear pore complex's dilation and constriction mechanism. Transport factor karyopherin initiates ring dilation by stabilizing Nup58, allowing larger molecules to pass through.
A UCL-led team of scientists has uncovered the structure of pores found in cell nuclei, revealing how they selectively block certain molecules from entering to protect genetic material and normal cell functions. The discovery could lead to the development of new antiviral drugs and better delivery mechanisms for gene therapy.
Scientists at the University of Basel have discovered that proteins within nuclear pores function like a 'velcro', enabling controlled and selective transport of particles. This discovery has potential applications in lab-on-a-chip technology, where it could be used to miniaturize complex pump and valve systems.
Researchers at the Stowers Institute discovered that Ndc1, a conserved nuclear envelope protein, works with Mps3 to regulate insertion sites into the nuclear membrane. The team found that Mps3 helps shuttle Ndc1 to specific locations in the nucleus, controlling the distribution of critical structures.
Nuclear pores serve as transcription factories for genes, regulating their production speed. The discovery reveals a new role for these microscopic structures in the cell nucleus.
Researchers at EMBL used super-resolution microscopy to determine the arrangement of Y-shaped molecules in the nuclear pore complex, resolving a decade-old controversy. The study found that the Ys lie in an orderly circle around the opening, with all arms pointing towards the centre.
New evidence published in Cell reveals a novel budding mechanism capable of exporting large ribonucleoprotein particles from the nucleus to the cytoplasm, fundamentally changing our understanding of mRNA export from the nucleus. This study has implications for diseases such as muscular dystrophies and herpes-type infections.
Viruses, such as adenovirus, exploit host cell mechanisms to smuggle their DNA into the nucleus for reproduction. The viral DNA is transported into the nucleus using the kinesin motor protein and a gatekeeper molecule, allowing it to reproduce easily.
Scientists have determined the 3D structure of a key cellular component using a heat-loving fungus. By analyzing the genome and proteome of Chaetomium thermophilum, researchers were able to identify the proteins that make up the innermost ring of the nuclear pore, a channel that controls what enters and exits a cell's nucleus.
A team of researchers has developed a biomimetic nanopore that selectively transports individual proteins across its surface, mirroring the behavior of natural nuclear pores. The study uses functionalized key proteins to create a synthetic pore that can be used as a testing platform for drug delivery into a cell's nucleus.
Rockefeller scientists have developed a new polarized microscopy technique that can help deduce the orientation of specific proteins within cells. By harnessing the unique properties of polarized light, researchers have filled in the gaps left by other techniques and made important new discoveries about protein complexes.
Researchers at Albert Einstein College of Medicine have developed a microscope apparatus that achieves unprecedented resolution in living cells, allowing them to visualize the dynamic mechanism by which messenger RNA molecules pass through nuclear pores. This breakthrough could lead to treatments for disorders such as myotonic dystrophy.
Researchers identified two distinct mechanisms for nuclear pore complex assembly during interphase and post-mitotic stages, shedding light on cell cycle-dependent differences in nuclear membrane topology. The findings have implications for conditions such as cancer, developmental defects, and sudden cardiac arrest.
Researchers at Salk Institute found that nucleoporins, proteins in nuclear pore complexes, act as transcription factors regulating genes during early development. They also offer new insights into cancer mechanisms and potential markers for causes of cancer.
Researchers have for the first time visualized the three-dimensional structure of a crucial subcomplex of the nuclear pore complex (NPC), a fundamental innovation in multicellular life. The findings support a common architecture between NPCs and coated vesicles, revealing an ancient evolutionary connection.
The Salk Institute researchers created a cell-free system to study the insertion of nuclear pore complexes into the nuclear membrane. Using advanced imaging tools, they observed the formation of nuclear membranes and pores within an hour.