The movements of beads pulled by several kinesin-1 (conventional kinesin) motors are studied both theoretically and experimentally. While the velocity is approximately independent of the number of motors pulling the beads, the walking distance or run-length is strongly increased when more motors are involved. Run-length distributions are measured for a wide range of motor concentrations and matched to theoretically calculated distributions using only two global fit parameters. In this way, the maximal number of motors pulling the beads is estimated to vary between two and seven motors for total kinesin concentrations between 0.1 and 2.5 microg/ml or between 0.27 and 6.7 nM. In the same concentration regime, the average number of pulling motors is found to lie between 1.1 and 3.2 motors.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2157241 | PMC |
| http://dx.doi.org/10.1529/biophysj.106.097881 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Symbolic dynamics of joint brain states during dyadic coordination.
Chaos
January 2025
Department of Cognitive Sciences, University of California, Irvine, California 92617, USA.
We propose a novel approach to investigate the brain mechanisms that support coordination of behavior between individuals. Brain states in single individuals defined by the patterns of functional connectivity between brain regions are used to create joint symbolic representations of brain states in two or more individuals to investigate symbolic dynamics that are related to interactive behaviors. We apply this approach to electroencephalographic data from pairs of subjects engaged in two different modes of finger-tapping coordination tasks (synchronization and syncopation) under different interaction conditions (uncoupled, leader-follower, and mutual) to explore the neural mechanisms of multi-person motor coordination.
View Article and Find Full Text PDFAnticipatory smooth pursuit eye movements scale with the probability of visual motion: The role of target speed and acceleration.
J Vis
January 2025
Institut de Neurosciences de la Timone, CNRS & Aix-Marseille Université, Marseille, France.
Sensory-motor systems can extract statistical regularities in dynamic uncertain environments, enabling quicker responses and anticipatory behavior for expected events. Anticipatory smooth pursuit eye movements (aSP) have been observed in primates when the temporal and kinematic properties of a forthcoming visual moving target are fully or partially predictable. To investigate the nature of the internal model of target kinematics underlying aSP, we tested the effect of varying the target kinematics and its predictability.
View Article and Find Full Text PDFDiagnosis and treatment of autonomic failure, pain and sleep disturbances in Parkinson's disease: guideline "Parkinson's disease" of the German Society of Neurology.
J Neurol
January 2025
Department of Neurology, LMU University Hospital, Ludwig-Maximilians-Universität (LMU) München, Munich, Germany.
Background And Objective: Non-motor symptoms frequently develop throughout the disease course of Parkinson's disease (PD), and pose affected individuals at risk of complications, more rapid disease progression and poorer quality of life. Addressing such symptom burden, the 2023 revised "Parkinson's disease" guideline of the German Society of Neurology aimed at providing evidence-based recommendations for managing PD non-motor symptoms, including autonomic failure, pain and sleep disturbances.
Methods: Key PICO (Patient, Intervention, Comparison, Outcome) questions were formulated by the steering committee and refined by the assigned authors.
Breaking Barriers in Huntington's Disease Therapy: Focused Ultrasound for Targeted Drug Delivery.
Neurochem Res
January 2025
Diagnostic Radiology Department, National Cancer Institute, Misrata, Libya.
Huntington's disease (HD) is a progressive neurodegenerative disease resulting from a mutation in the huntingtin (HTT) gene and characterized by progressive motor dysfunction, cognitive decline, and psychiatric disturbances. Currently, no disease-modifying treatments are available. Recent research has developed therapeutic agents that may have the potential to directly target the disease pathology, such as gene silencing or clearing the mutant protein.
View Article and Find Full Text PDFChitosan lactate improves repeated closed head injury-generated motor and neurological dysfunctions in mice by impacting microbiota gut-brain axis.
Metab Brain Dis
January 2025
Department of Biological Sciences (Pharmacology and Toxicology), National Institute of Pharmaceutical Education and Research (NIPER) Hyderabad, Balanagar, Hyderabad, 500037, Telangana, India.
The negative impact of repeated-mild traumatic brain injury (rmTBI) is profoundly seen in circadian-disrupted individuals. The unrelenting inflammation, glial activation, and gut dysbiosis are key neuropathological aberrations in the aftermath of rmTBI. In this study, we examined the impact of chitosan lactate (CL) on circadian disturbance (CD) + rmTBI-generated neurological dysfunctions and its prebiotic response on the gut-brain axis.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!