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Ralf A, van Wersch B, Montiel González D, Kayser M. Male Pedigree Toolbox: A Versatile Software for Y-STR Data Analyses. Genes (Basel) 2024; 15:227. [PMID: 38397216 PMCID: PMC10887500 DOI: 10.3390/genes15020227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 02/06/2024] [Accepted: 02/08/2024] [Indexed: 02/25/2024] Open
Abstract
Y-chromosomal short tandem repeats (Y-STRs) are widely used in forensic, genealogical, and population genetics. With the recent increase in the number of rapidly mutating (RM) Y-STRs, an unprecedented level of male differentiation can be achieved, widening and improving the applications of Y-STRs in various fields, including forensics. The growing complexity of Y-STR data increases the need for automated data analyses, but dedicated software tools are scarce. To address this, we present the Male Pedigree Toolbox (MPT), a software tool for the automated analysis of Y-STR data in the context of patrilineal genealogical relationships. The MPT can estimate mutation rates and male relative differentiation rates from input Y-STR pedigree data. It can aid in determining ancestral haplotypes within a pedigree and visualize the genetic variation within pedigrees in all branches of family trees. Additionally, it can provide probabilistic classifications using machine learning, helping to establish or prove the structure of the pedigree and the level of relatedness between males, even for closely related individuals with highly similar haplotypes. The tool is flexible and easy to use and can be adjusted to any set of Y-STR markers by modifying the intuitive input file formats. We introduce the MPT software tool v1.0 and make it publicly available with the goal of encouraging and supporting forensic, genealogical, and other geneticists in utilizing the full potential of Y-STRs for both research purposes and practical applications, including criminal casework.
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Affiliation(s)
- Arwin Ralf
- Department of Genetic Identification, Erasmus MC, University Medical Center Rotterdam, 3015 CN Rotterdam, The Netherlands
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Zheng J, Yang J, Zhao F, Peng B, Wang Y, Fang M. CIL-ExPMRM: An Ultrasensitive Chemical Isotope Labeling Assisted Pseudo-MRM Platform to Accelerate Exposomic Suspect Screening. Environ Sci Technol 2023; 57:10962-10973. [PMID: 37469223 DOI: 10.1021/acs.est.3c01830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/21/2023]
Abstract
Exposome is the future of next-generation environmental health to establish the association between environmental exposure and diseases. However, due to low concentrations of exposure chemicals, exposome has been hampered by lacking an effective analytical platform to characterize its composition. In this study, by combining the benefit of chemical isotope labeling and pseudo-multiple reaction monitoring (CIL-pseudo-MRM), we have developed one highly sensitive and high-throughput platform (CIL-ExPMRM) by isotope labeling urinary exposure biomarkers. Dansyl chloride (DnsCl), N-methylphenylethylamine (MPEA), and their isotope-labeled forms were used to derivatize polar hydroxyl and carboxyl compounds, respectively. We have programmed a series of scripts to optimize MRM transition parameters, curate the MRM database (>70,000 compounds), predict accurate retention time (RT), and automize dynamic MRMs. This was followed by an automated MRM peak assignment, peak alignment, and statistical analysis. A computational pipeline was eventually incorporated into a user-friendly website interface, named CIL-ExPMRM (http://www.exposomemrm.com/). The performance of this platform has been validated with a relatively low false positive rate (10.7%) across instrumental platforms. CIL-ExPMRM has systematically overcome key bottlenecks of exposome studies to some extent and outperforms previous methods due to its independence of MS/MS availability, accurate RT prediction, and collision energy optimization, as well as the ultrasensitivity and automated robust intensity-based quantification. Overall, CIL-ExPMRM has great potential to advance the exposomic studies based on urinary biomarkers.
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Affiliation(s)
- Jie Zheng
- Singapore Phenome Center, Lee Kong Chian School of Medicine, Nanyang Technological University, 639798 Singapore
| | - Junjie Yang
- School of Civil and Environmental Engineering, Nanyang Technological University, 639798 Singapore
| | - Fanrong Zhao
- School of Civil and Environmental Engineering, Nanyang Technological University, 639798 Singapore
| | - Bo Peng
- School of Civil and Environmental Engineering, Nanyang Technological University, 639798 Singapore
| | - Yulan Wang
- Singapore Phenome Center, Lee Kong Chian School of Medicine, Nanyang Technological University, 639798 Singapore
| | - Mingliang Fang
- School of Civil and Environmental Engineering, Nanyang Technological University, 639798 Singapore
- Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China
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Bloom J, Triantafyllidis A, Quaglieri A, Burton Ngov P, Infusini G, Webb A. Mass Dynamics 1.0: A Streamlined, Web-Based Environment for Analyzing, Sharing, and Integrating Label-Free Data. J Proteome Res 2021; 20:5180-5188. [PMID: 34647461 DOI: 10.1021/acs.jproteome.1c00683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Label-free quantification (LFQ) of shotgun proteomics data is a popular and robust method for the characterization of relative protein abundance between samples. Many analytical pipelines exist for the automation of this analysis, and some tools exist for the subsequent representation and inspection of the results of these pipelines. Mass Dynamics 1.0 (MD 1.0) is a web-based analysis environment that can analyze and visualize LFQ data produced by software such as MaxQuant. Unlike other tools, MD 1.0 utilizes a cloud-based architecture to enable researchers to store their data, enabling researchers to not only automatically process and visualize their LFQ data but also annotate and share their findings with collaborators and, if chosen, to easily publish results to the community. With a view toward increased reproducibility and standardization in proteomics data analysis and streamlining collaboration between researchers, MD 1.0 requires minimal parameter choices and automatically generates quality control reports to verify experiment integrity. Here, we demonstrate that MD 1.0 provides reliable results for protein expression quantification, emulating Perseus on benchmark datasets over a wide dynamic range. The MD 1.0 platform is available globally via: https://app.massdynamics.com/.
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Affiliation(s)
- Joseph Bloom
- Mass Dynamics, C/O Hub Southern Cross, Level 2, 696 Bourke Street, Melbourne, Victoria 3000, Australia
| | - Aaron Triantafyllidis
- Mass Dynamics, C/O Hub Southern Cross, Level 2, 696 Bourke Street, Melbourne, Victoria 3000, Australia
| | - Anna Quaglieri
- Mass Dynamics, C/O Hub Southern Cross, Level 2, 696 Bourke Street, Melbourne, Victoria 3000, Australia
| | - Paula Burton Ngov
- Mass Dynamics, C/O Hub Southern Cross, Level 2, 696 Bourke Street, Melbourne, Victoria 3000, Australia
| | - Giuseppe Infusini
- Mass Dynamics, C/O Hub Southern Cross, Level 2, 696 Bourke Street, Melbourne, Victoria 3000, Australia.,The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria 3052, Australia.,Department of Medical Biology, University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Andrew Webb
- Mass Dynamics, C/O Hub Southern Cross, Level 2, 696 Bourke Street, Melbourne, Victoria 3000, Australia.,The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria 3052, Australia.,Department of Medical Biology, University of Melbourne, Melbourne, Victoria 3010, Australia
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Baldassano SN, Roberson SW, Balu R, Scheid B, Bernabei JM, Pathmanathan J, Oommen B, Leri D, Echauz J, Gelfand M, Bhalla PK, Hill CE, Christini A, Wagenaar JB, Litt B. IRIS: A Modular Platform for Continuous Monitoring and Caretaker Notification in the Intensive Care Unit. IEEE J Biomed Health Inform 2020; 24:2389-2397. [PMID: 31940568 PMCID: PMC7485608 DOI: 10.1109/jbhi.2020.2965858] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
OBJECTIVE New approaches are needed to interpret large amounts of physiologic data continuously recorded in the ICU. We developed and prospectively validated a versatile platform (IRIS) for real-time ICU physiologic monitoring, clinical decision making, and caretaker notification. METHODS IRIS was implemented in the neurointensive care unit to stream multimodal time series data, including EEG, intracranial pressure (ICP), and brain tissue oxygenation (PbtO2), from ICU monitors to an analysis server. IRIS was applied for 364 patients undergoing continuous EEG, 26 patients undergoing burst suppression monitoring, and four patients undergoing intracranial pressure and brain tissue oxygen monitoring. Custom algorithms were used to identify periods of elevated ICP, compute burst suppression ratios (BSRs), and detect faulty or disconnected EEG electrodes. Hospital staff were notified of clinically relevant events using our secure API to route alerts through a password-protected smartphone application. RESULTS Sustained increases in ICP and concordant decreases in PbtO2 were reliably detected using user-defined thresholds and alert throttling. BSR trends computed by the platform correlated highly with manual neurologist markings (r2 0.633-0.781; p < 0.0001). The platform identified EEG electrodes with poor signal quality with 95% positive predictive value, and reduced latency of technician response by 93%. CONCLUSION This study validates a flexible real-time platform for monitoring and interpreting ICU data and notifying caretakers of actionable results, with potential to reduce the manual burden of continuous monitoring services on care providers. SIGNIFICANCE This work represents an important step toward facilitating translational medical data analytics to improve patient care and reduce health care costs.
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Shah AD, Goode RJA, Huang C, Powell DR, Schittenhelm RB. LFQ-Analyst: An Easy-To-Use Interactive Web Platform To Analyze and Visualize Label-Free Proteomics Data Preprocessed with MaxQuant. J Proteome Res 2019; 19:204-211. [PMID: 31657565 DOI: 10.1021/acs.jproteome.9b00496] [Citation(s) in RCA: 82] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Relative label-free quantification (LFQ) of shotgun proteomics data using precursor (MS1) signal intensities is one of the most commonly used applications to comprehensively and globally quantify proteins across biological samples and conditions. Due to the popularity of this technique, several software packages, such as the popular software suite MaxQuant, have been developed to extract, analyze, and compare spectral features and to report quantitative information of peptides, proteins, and even post-translationally modified sites. However, there is still a lack of accessible tools for the interpretation and downstream statistical analysis of these complex data sets, in particular for researchers and biologists with no or only limited experience in proteomics, bioinformatics, and statistics. We have therefore created LFQ-Analyst, which is an easy-to-use, interactive web application developed to perform differential expression analysis with "one click" and to visualize label-free quantitative proteomic data sets preprocessed with MaxQuant. LFQ-Analyst provides a wealth of user-analytic features and offers numerous publication-quality result graphics to facilitate statistical and exploratory analysis of label-free quantitative data sets. LFQ-Analyst, including an in-depth user manual, is freely available at https://bioinformatics.erc.monash.edu/apps/LFQ-Analyst .
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Mendes Coelho VC, Morita ME, Amorim BJ, Ramos CD, Yasuda CL, Tedeschi H, Ghizoni E, Cendes F. Automated Online Quantification Method for 18F-FDG Positron Emission Tomography/CT Improves Detection of the Epileptogenic Zone in Patients with Pharmacoresistant Epilepsy. Front Neurol 2017; 8:453. [PMID: 28919879 PMCID: PMC5585153 DOI: 10.3389/fneur.2017.00453] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Accepted: 08/15/2017] [Indexed: 12/02/2022] Open
Abstract
Aims To assess the validity of an online method to quantitatively evaluate cerebral hypometabolism in patients with pharmacoresistant focal epilepsy as a complement to the visual analysis of the 18F-FDG positron emission tomography (PET)/CT exam. Methods A total of 39 patients with pharmacoresistant epilepsy and probable focal cortical dysplasia [22 patients with frontal lobe epilepsy (FLE) and 17 with temporal lobe epilepsy (TLE)] underwent a presurgical evaluation including EEG, video-EEG, MRI, and 18F-FDG PET/CT. We conducted the automated quantification of their 18F-FDG PET/CT data and compared the results with those of the visual-PET analysis conducted by experienced nuclear medicine physicians. For each patient group, we calculated Cohen’s Kappa coefficient for the visual and quantitative analyses, as well as each method’s sensitivity, specificity, and positive and negative predictive values. Results For the TLE group, both the visual and quantitative analyses showed high agreement. Thus, although the quantitative analysis could be used as a complement, the visual analysis on its own was consistent and precise. For the FLE group, on the other hand, the visual analysis categorized almost half of the cases as normal, revealing very low agreement. For those patients, the quantitative analysis proved critical to identify the focal hypometabolism characteristic of the epileptogenic zone. Our results suggest that the quantitative analysis of 18F-FDG PET/CT data is critical for patients with extratemporal epilepsies, and especially those with subtle MRI findings. Furthermore, it can easily be used during the routine clinical evaluation of 18F-FDG PET/CT exams. Significance Our results show that quantification of 18F-FDG PET is an informative complementary method that can be added to the routine visual evaluation of patients with subtle lesions, particularly those in the frontal lobes.
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Affiliation(s)
| | - Marcia E Morita
- Neurology/Epilepsy, Unicamp - University of Campinas, Campinas, Brazil
| | - Barbara J Amorim
- Nuclear Medicine Department, Unicamp - University of Campinas, Campinas, Brazil
| | - Celso Darío Ramos
- Nuclear Medicine Department, Unicamp - University of Campinas, Campinas, Brazil
| | - Clarissa L Yasuda
- Neurology/Epilepsy, Unicamp - University of Campinas, Campinas, Brazil
| | - Helder Tedeschi
- Neurosurgery/Epilepsy, Unicamp - University of Campinas, Campinas, Brazil
| | - Enrico Ghizoni
- Neurosurgery/Epilepsy, Unicamp - University of Campinas, Campinas, Brazil
| | - Fernando Cendes
- Neurology/Epilepsy, Unicamp - University of Campinas, Campinas, Brazil
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Kellner-Weldon F, Stippich C, Wiest R, Lehmann V, Meier R, Beck J, Schucht P, Raabe A, Reyes M, Bink A. Comparison of perioperative automated versus manual two-dimensional tumor analysis in glioblastoma patients. Eur J Radiol 2017; 95:75-81. [PMID: 28987701 DOI: 10.1016/j.ejrad.2017.07.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Revised: 07/21/2017] [Accepted: 07/31/2017] [Indexed: 11/26/2022]
Abstract
OBJECTIVES Current recommendations for the measurement of tumor size in glioblastoma continue to employ manually measured 2D product diameters of enhancing tumor. To overcome the rater dependent variability, this study aimed to evaluate the potential of automated 2D tumor analysis (ATA) compared to highly experienced rater teams in the workup of pre- and postoperative image interpretation in a routine clinical setting. MATERIALS AND METHODS From 92 patients with newly diagnosed GB and performed surgery, manual rating of the sum product diameter (SPD) of enhancing tumor on magnetic resonance imaging (MRI) contrast enhanced T1w was compared to automated machine learning-based tumor analysis using FLAIR, T1w, T2w and contrast enhanced T1w. RESULTS Preoperative correlation of SPD between two rater teams (1 and 2) was r=0.921 (p<0.0001). Difference among the rater teams and ATA (p=0.567) was not statistically significant. Correlation between team 1 vs. automated tumor analysis and team 2 vs. automated tumor analysis was r=0.922 and r=0.897, respectively (p<0.0001 for both). For postoperative evaluation interrater agreement between team 1 and 2 was moderate (Kappa 0.53). Manual consensus classified 46 patients as completely resected enhancing tumor. Automated tumor analysis agreed in 13/46 (28%) due to overestimation caused by hemorrhage and choroid plexus enhancement. CONCLUSIONS Automated 2D measurements can be promisingly translated into clinical trials in the preoperative evaluation. Immediate postoperative SPD evaluation for extent of resection is mainly influenced by postoperative blood depositions and poses challenges for human raters and ATA alike.
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Affiliation(s)
- Frauke Kellner-Weldon
- Support Center for Advanced Neuroimaging - Institute for Diagnostic and Interventional Neuroradiology, University Hospital Inselspital and University of Bern, Bern, Switzerland.
| | - Christoph Stippich
- Department of Radiology, Division of Diagnostic and Interventional Neuroradiology, University Hospital, Basel, Switzerland
| | - Roland Wiest
- Support Center for Advanced Neuroimaging - Institute for Diagnostic and Interventional Neuroradiology, University Hospital Inselspital and University of Bern, Bern, Switzerland
| | - Vera Lehmann
- Support Center for Advanced Neuroimaging - Institute for Diagnostic and Interventional Neuroradiology, University Hospital Inselspital and University of Bern, Bern, Switzerland
| | - Raphael Meier
- Institute of Surgical Technology and Biomechanics, University of Bern, Bern, Switzerland
| | - Jürgen Beck
- Department of Neurosurgery, University Hospital Inselspital and University of Bern, Bern, Switzerland
| | - Philippe Schucht
- Department of Neurosurgery, University Hospital Inselspital and University of Bern, Bern, Switzerland
| | - Andreas Raabe
- Department of Neurosurgery, University Hospital Inselspital and University of Bern, Bern, Switzerland
| | - Mauricio Reyes
- Institute of Surgical Technology and Biomechanics, University of Bern, Bern, Switzerland
| | - Andrea Bink
- Department of Radiology, Division of Diagnostic and Interventional Neuroradiology, University Hospital, Basel, Switzerland
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Didenko T, Proudfoot A, Dutta SK, Serrano P, Wüthrich K. Non-Uniform Sampling and J-UNIO Automation for Efficient Protein NMR Structure Determination. Chemistry 2015; 21:12363-9. [PMID: 26227870 PMCID: PMC4576834 DOI: 10.1002/chem.201502544] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Indexed: 11/10/2022]
Abstract
High-resolution structure determination of small proteins in solution is one of the big assets of NMR spectroscopy in structural biology. Improvements in the efficiency of NMR structure determination by advances in NMR experiments and automation of data handling therefore attracts continued interest. Here, non-uniform sampling (NUS) of 3D heteronuclear-resolved [(1)H,(1)H]-NOESY data yielded two- to three-fold savings of instrument time for structure determinations of soluble proteins. With the 152-residue protein NP_372339.1 from Staphylococcus aureus and the 71-residue protein NP_346341.1 from Streptococcus pneumonia we show that high-quality structures can be obtained with NUS NMR data, which are equally well amenable to robust automated analysis as the corresponding uniformly sampled data.
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Affiliation(s)
- Tatiana Didenko
- Department of Integrative Structural and Computational Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037 (USA) http://www.jcsg.org
- Joint Center for Structural Genomics, La Jolla, CA 92037 (USA), Fax: (+1) 858-784-8014
- GPCR-Network, 3430 S. Vermont Ave., TRF 105, Los Angeles, CA 90089-3301 (USA), Fax: (+1) 858-784-8014 http://gpcr.usc.edu
| | - Andrew Proudfoot
- Department of Integrative Structural and Computational Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037 (USA) http://www.jcsg.org
- Joint Center for Structural Genomics, La Jolla, CA 92037 (USA), Fax: (+1) 858-784-8014
| | - Samit Kumar Dutta
- Department of Integrative Structural and Computational Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037 (USA) http://www.jcsg.org
- Joint Center for Structural Genomics, La Jolla, CA 92037 (USA), Fax: (+1) 858-784-8014
| | - Pedro Serrano
- Department of Integrative Structural and Computational Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037 (USA) http://www.jcsg.org
- Joint Center for Structural Genomics, La Jolla, CA 92037 (USA), Fax: (+1) 858-784-8014
| | - Kurt Wüthrich
- Department of Integrative Structural and Computational Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037 (USA) http://www.jcsg.org. , ,
- Joint Center for Structural Genomics, La Jolla, CA 92037 (USA), Fax: (+1) 858-784-8014. , ,
- GPCR-Network, 3430 S. Vermont Ave., TRF 105, Los Angeles, CA 90089-3301 (USA), Fax: (+1) 858-784-8014 http://gpcr.usc.edu. , ,
- Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037 (USA), Fax: (+1) 858-784-8014. , ,
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Dutta SK, Serrano P, Proudfoot A, Geralt M, Pedrini B, Herrmann T, Wüthrich K. APSY-NMR for protein backbone assignment in high-throughput structural biology. J Biomol NMR 2015; 61:47-53. [PMID: 25428764 PMCID: PMC4305044 DOI: 10.1007/s10858-014-9881-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Accepted: 11/18/2014] [Indexed: 05/12/2023]
Abstract
A standard set of three APSY-NMR experiments has been used in daily practice to obtain polypeptide backbone NMR assignments in globular proteins with sizes up to about 150 residues, which had been identified as targets for structure determination by the Joint Center for Structural Genomics (JCSG) under the auspices of the Protein Structure Initiative (PSI). In a representative sample of 30 proteins, initial fully automated data analysis with the software UNIO-MATCH-2014 yielded complete or partial assignments for over 90 % of the residues. For most proteins the APSY data acquisition was completed in less than 30 h. The results of the automated procedure provided a basis for efficient interactive validation and extension to near-completion of the assignments by reference to the same 3D heteronuclear-resolved [(1)H,(1)H]-NOESY spectra that were subsequently used for the collection of conformational constraints. High-quality structures were obtained for all 30 proteins, using the J-UNIO protocol, which includes extensive automation of NMR structure determination.
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Affiliation(s)
- Samit Kumar Dutta
- Department of Integrative Structural and Computational Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA, and Joint Center for Structural Genomics (http://www.jcsg.org.), La Jolla, CA 92037, USA
| | - Pedro Serrano
- Department of Integrative Structural and Computational Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA, and Joint Center for Structural Genomics (http://www.jcsg.org.), La Jolla, CA 92037, USA
| | - Andrew Proudfoot
- Department of Integrative Structural and Computational Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA, and Joint Center for Structural Genomics (http://www.jcsg.org.), La Jolla, CA 92037, USA
| | - Michael Geralt
- Department of Integrative Structural and Computational Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA, and Joint Center for Structural Genomics (http://www.jcsg.org.), La Jolla, CA 92037, USA
| | - Bill Pedrini
- Department of Integrative Structural and Computational Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA, and Joint Center for Structural Genomics (http://www.jcsg.org.), La Jolla, CA 92037, USA
- Institute of Molecular Biology and Biophysics, ETH Zürich, CH-8093 Zürich, Switzerland
| | - Torsten Herrmann
- Institut des Sciences Analytiques, Centre de RMN à Très Hauts Champs, Université de Lyon, UMR 5280 CNRS, ENS Lyon, UCB Lyon 1, 5 rue de la Doua, 69100 Villeurbanne, France
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Russo G, Spinella S, Sciacca E, Bonfante P, Genre A. Automated analysis of calcium spiking profiles with CaSA software: two case studies from root-microbe symbioses. BMC Plant Biol 2013; 13:224. [PMID: 24369773 PMCID: PMC3880239 DOI: 10.1186/1471-2229-13-224] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Accepted: 12/11/2013] [Indexed: 05/03/2023]
Abstract
BACKGROUND Repeated oscillations in intracellular calcium (Ca2+) concentration, known as Ca2+ spiking signals, have been described in plants for a limited number of cellular responses to biotic or abiotic stimuli and most notably the common symbiotic signaling pathway (CSSP) which mediates the recognition by their plant hosts of two endosymbiotic microbes, arbuscular mycorrhizal (AM) fungi and nitrogen fixing rhizobia. The detailed analysis of the complexity and variability of the Ca2+ spiking patterns which have been revealed in recent studies requires both extensive datasets and sophisticated statistical tools. RESULTS As a contribution, we have developed automated Ca2+ spiking analysis (CaSA) software that performs i) automated peak detection, ii) statistical analyses based on the detected peaks, iii) autocorrelation analysis of peak-to-peak intervals to highlight major traits in the spiking pattern.We have evaluated CaSA in two experimental studies. In the first, CaSA highlighted unpredicted differences in the spiking patterns induced in Medicago truncatula root epidermal cells by exudates of the AM fungus Gigaspora margarita as a function of the phosphate concentration in the growth medium of both host and fungus. In the second study we compared the spiking patterns triggered by either AM fungal or rhizobial symbiotic signals. CaSA revealed the existence of different patterns in signal periodicity, which are thought to contribute to the so-called Ca2+ signature. CONCLUSIONS We therefore propose CaSA as a useful tool for characterizing oscillatory biological phenomena such as Ca2+ spiking.
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Affiliation(s)
- Giulia Russo
- Dipartimento di Scienze della Vita e Biologia dei Sistemi, Università di Torino, Viale P.A. Mattioli 25, 10125 Torino, Italy
| | - Salvatore Spinella
- Dipartimento di Informatica, Università di Torino, C.So Svizzera, 185, 10149 Torino, Italy
| | - Eva Sciacca
- Dipartimento di Informatica, Università di Torino, C.So Svizzera, 185, 10149 Torino, Italy
| | - Paola Bonfante
- Dipartimento di Scienze della Vita e Biologia dei Sistemi, Università di Torino, Viale P.A. Mattioli 25, 10125 Torino, Italy
| | - Andrea Genre
- Dipartimento di Scienze della Vita e Biologia dei Sistemi, Università di Torino, Viale P.A. Mattioli 25, 10125 Torino, Italy
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