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  • 1.
    Andersson, Annika
    et al.
    KTH, Centra, Science for Life Laboratory, SciLifeLab. KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap.
    Remnestål, Julia
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap, Affinity Proteomics. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Nellgård, B.
    Vunk, Helian
    KTH, Centra, Science for Life Laboratory, SciLifeLab. KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap.
    Kotol, David
    KTH, Centra, Science for Life Laboratory, SciLifeLab. KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap.
    Edfors, Fredrik
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Uhlén, Mathias
    KTH, Centra, Science for Life Laboratory, SciLifeLab. KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap.
    Schwenk, Jochen M.
    KTH, Centra, Science for Life Laboratory, SciLifeLab. KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap.
    Ilag, L. L.
    Zetterberg, H.
    Blennow, K.
    Månberg, Anna
    KTH, Centra, Science for Life Laboratory, SciLifeLab. KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap.
    Nilsson, Peter
    KTH, Centra, Science for Life Laboratory, SciLifeLab. KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap.
    Fredolini, Claudia
    KTH, Centra, Science for Life Laboratory, SciLifeLab. KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap, Affinity Proteomics.
    Development of parallel reaction monitoring assays for cerebrospinal fluid proteins associated with Alzheimer's disease2019Inngår i: Clinica Chimica Acta, ISSN 0009-8981, E-ISSN 1873-3492, Vol. 494, s. 79-93Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Detailed knowledge of protein changes in cerebrospinal fluid (CSF) across healthy and diseased individuals would provide a better understanding of the onset and progression of neurodegenerative disorders. In this study, we selected 20 brain-enriched proteins previously identified in CSF by antibody suspension bead arrays (SBA) to be potentially biomarkers for Alzheimer's disease (AD) and verified these using an orthogonal approach. We examined the same set of 94 CSF samples from patients affected by AD (including preclinical and prodromal), mild cognitive impairment (MCI), non-AD dementia and healthy individuals, which had previously been analyzed by SBA. Twenty-eight parallel reaction monitoring (PRM) assays were developed and 13 of them could be validated for protein quantification. Antibody profiles were verified by PRM. For seven proteins, the antibody profiles were highly correlated with the PRM results (r > 0.7) and GAP43, VCAM1 and PSAP were identified as potential markers of preclinical AD. In conclusion, we demonstrate the usefulness of targeted mass spectrometry as a tool for the orthogonal verification of antibody profiling data, suggesting that these complementary methods can be successfully applied for comprehensive exploration of CSF protein levels in neurodegenerative disorders.

  • 2.
    Edfors, Fredrik
    et al.
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap, Systembiologi. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Forsström, Björn
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap, Systembiologi. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Vunk, Helian
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap, Systembiologi. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Kotol, David
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap, Systembiologi. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Fredolini, Claudia
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap, Affinity Proteomics. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Maddalo, Gianluca
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap, Systembiologi. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Svensson, Anne-Sophie
    KTH.
    Boström, Tove
    KTH.
    Tegel, Hanna
    KTH.
    Nilsson, Peter
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap, Affinity Proteomics. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Schwenk, Jochen M.
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap, Affinity Proteomics. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Uhlén, Mathias
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap, Systembiologi. KTH, Centra, Science for Life Laboratory, SciLifeLab. Karolinska Inst, Dept Neurosci, SE-17165 Solna, Sweden.;Tech Univ Denmark, Novo Nordisk Fdn Ctr Biosustainabil, DK-2970 Horsholm, Denmark..
    Screening a Resource of Recombinant Protein Fragments for Targeted Proteomics2019Inngår i: Journal of Proteome Research, ISSN 1535-3893, E-ISSN 1535-3907, Vol. 18, nr 7, s. 2706-2718Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The availability of proteomics resources hosting protein and peptide standards, as well as the data describing their analytical performances, will continue to enhance our current capabilities to develop targeted proteomics methods for quantitative biology. This study describes the analysis of a resource of 26,840 individually purified recombinant protein fragments corresponding to more than 16,000 human protein-coding genes. The resource was screened to identify proteotypic peptides suitable for targeted proteomics efforts, and we report LC-MS/MS assay coordinates for more than 25,000 proteotypic peptides, corresponding to more than 10,000 unique proteins. Additionally, peptide formation and digestion kinetics were, for a subset of the standards, monitored using a time-course protocol involving parallel digestion of isotope-labeled recombinant protein standards and endogenous human plasma proteins. We show that the strategy by adding isotope-labeled recombinant proteins before trypsin digestion enables short digestion protocols (<= 60 min) with robust quantitative precision. In a proof-of-concept study, we quantified 23 proteins in human plasma using assay parameters defined in our study and used the standards to describe distinct clusters of individuals linked to different levels of LPA, APOE, SERPINAS, and TFRC. In summary, we describe the use and utility of a resource of recombinant proteins to identify proteotypic peptides useful for targeted proteomics assay development.

  • 3.
    Edfors, Fredrik
    et al.
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Hober, Andreas
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Linderbäck, Klas
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Maddalo, Gianluca
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Azimi, Alireza
    Karolinska Inst, Karolinska Univ Hosp, Dept Oncol Pathol, SE-17177 Stockholm, Sweden..
    Sivertsson, Åsa
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Tegel, Hanna
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Hober, Sophia
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Al-Khalili Szigyarto, Cristina
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Fagerberg, Linn
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    von Feilitzen, Kalle
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Oksvold, Per
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Lindskog, Cecilia
    Uppsala Univ, Dept Immunol Genet & Pathol, SE-75185 Uppsala, Sweden..
    Forsström, Björn
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Uhlén, Mathias
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap. KTH, Centra, Science for Life Laboratory, SciLifeLab. Biosustainabil, DK-2970 Horsholm, Denmark..
    Enhanced validation of antibodies for research applications2018Inngår i: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 9, artikkel-id 4130Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    There is a need for standardized validation methods for antibody specificity and selectivity. Recently, five alternative validation pillars were proposed to explore the specificity of research antibodies using methods with no need for prior knowledge about the protein target. Here, we show that these principles can be used in a streamlined manner for enhanced validation of research antibodies in Western blot applications. More than 6,000 antibodies were validated with at least one of these strategies involving orthogonal methods, genetic knockdown, recombinant expression, independent antibodies, and capture mass spectrometry analysis. The results show a path forward for efforts to validate antibodies in an application-specific manner suitable for both providers and users.

  • 4.
    Jahn, Michael
    et al.
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap, Systembiologi. KTH, Centra, Science for Life Laboratory, SciLifeLab. K.
    Vialas, Vital
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH). KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Karlsen, Jan
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap, Systembiologi. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Maddalo, Gianluca
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH). KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Edfors, Fredrik
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Forsström, Björn
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap, Systembiologi. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Uhlén, Mathias
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap, Systembiologi. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Käll, Lukas
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Genteknologi. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Hudson, Elton P.
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap, Systembiologi. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Growth of Cyanobacteria Is Constrained by the Abundance of Light and Carbon Assimilation Proteins2018Inngår i: Cell reports, ISSN 2211-1247, E-ISSN 2211-1247, Vol. 25, nr 2, s. 478-+Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Cyanobacteria must balance separate demands for energy generation, carbon assimilation, and biomass synthesis. We used shotgun proteomics to investigate proteome allocation strategies in the model cyanobacterium Synechocystis sp. PCC 6803 as it adapted to light and inorganic carbon (C-i) limitation. When partitioning the proteome into seven functional sectors, we find that sector sizes change linearly with growth rate. The sector encompassing ribosomes is significantly smaller than in E. coli, which may explain the lower maximum growth rate in Synechocystis. Limitation of light dramatically affects multiple proteome sectors, whereas the effect of C-i limitation is weak. Carbon assimilation proteins respond more strongly to changes in light intensity than to C-i. A coarse-grained cell economy model generally explains proteome trends. However, deviations from model predictions suggest that the large proteome sectors for carbon and light assimilation are not optimally utilized under some growth conditions and may constrain the proteome space available to ribosomes.

1 - 4 of 4
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