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Cytosolic HSP90 Cochaperones HOP and FKBP Interact with Freshly Synthesized Chloroplast Preproteins of Arabidopsis

molecular Plant 2011年第6期4卷 1133-1145页

作者： Christine Fellerer Regina Schweiger katharina Schongruber Jurgen Soil Serena Schwenker Department of Biology 1 Botany Ludwig-Maximilians-Universitat Munchen Grobhaderner Strasse 2-4 D-82152 Planegg-Martinsried Germany munich Center for Integrated Protein Science CiPSm Ludwig-Maximilians-Universitut Munchen Feodor-Lynen-Strasse 25 D-81377 Munich Germany

most chloroplast and mitochondrial proteins are synthesized in the cytosol of the plant cell and have to be imported into the organelles post-translationally. molecular chaperones play an important role in preventing protein aggregation of freshly translated preproteins and assist in maintaining the preproteins in an import competent state. Pre- proteins can associate with HSP70, HSP90, and 14-3-3 proteins in the cytosol. In this study, we analyzed a large set of wheat germ-translated chloroplast preproteins with respect to their chaperone binding. Our results demonstrate that the formation of distinct 14-3-3 or HSP90 containing preprotein complexes is a common feature in post-translational protein transport in addition to preproteins that seem to interact solely with HSP70. We were able to identify a diverse and extensive class of preproteins as HSP90 substrates, thus providing a tool for the investigation of HSP90 client protein association. The analyses of chimeric HSP90 and 14-3-3 binding preproteins with exchanged transit peptides indicate an involvement of both the transit peptide and the mature part of the proteins, in HSP90 binding. We identified two partner components of the HSP90 cycle, which were present in the preprotein containing high-molecular-weight complexes, the HSP70/HSP90 organizing protein HOP, as well as the immunophilin FKBP73. The results establish chloroplast preproteins as a general class of HSP90 client proteins in plants using HOP and FKBP as novel cochaperones.

关键词： Wheat germ in vitro translation chloroplast import chaperone.

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Evolution of C4 Phosphoenolpyruvate Carboxylase： Enhanced Feedback Inhibitor Tolerance Is Determined by a Single Residue

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molecular Plant 2013年第6期6卷 1996-1999页

作者： Judith katharina Paulus, Christian Niehus Georg Groth Cluster of Excellence on Plant Sciences (CEPLAS) Institute of Biochemical Plant Physiology Heinrich Heine University Düsseldorf Germany

Dear Editor, Phosphoenolpyruvate carboxylase （PEPC） is the essential enzyme for initial carbon fixation in C4 photosynthesis. The C4-PEPC evolved from a non-photosynthetic C3 ancestor by subtle sequence changes resulting in distinctly different kinetic and regulatory characteristics （Svensson et al., 1997）. malate and aspartate, which are formed from the carboxyla- tion product of PEPC, serve as feedback inhibitors of the PEPC （Wedding et al., 1990）. Higher malate or aspartate concen- trations during C4 photosynthesis require a reduced sensitiv- ity towards the feedback inhibitors of the C4-PEPC （Jacobs et al., 2008）.

关键词： Phosphoenolpyruvate carboxylase (PEPC) Inhibitor

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Sexual dimorphism in the alpine butterflies Boloria pales and Boloria napaea:differences in movement and foraging behavior (Lepidoptera:Nymphalidae)

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Insect Science 2018年第6期25卷 1089-1101页

作者： Stefan Ehl katharina Hostert Jana Korsch Patrick Gros Thomas Schmitt Department of Biogeography University of TrierTrierGermany Haus der Natur Salzburg Work group EntomologySalzburgAustria Senckenberg German Entomological Institute MünchebergGermany Entomology Department of ZoologyInstitute of Biology Martin Luther University Halle-WittenbergHalle (Saale)Germany

Sexual dimorphism is a widespread phenomenon in *** is reflected in differences in life history,behavior and *** of differences in behavior are mostly difficult and time-consuming,especially in high mountain *** enhance our knowledge on sexual dimorphisms of alpine butterflies,we performed a mark-release-recapture study on 2 species common in the Alps:Boloriapales and Boloria *** analysed movement and foraging behavior to investigate differences between *** sexes were mostly sedentary and the movement distances of males and females ***,obvious differences in dispersal behavior between the sexes were found in the movement *** different patterns were *** males showed intensive flight activity,but mostly flew only in a limited part of the entire habitat (i.e.,their individual home range)searching for females,whereas females were less flight active and flew only to find places for oviposition or *** third pattern,where individuals flew larger distances,was only observed in a small number of males,which always returned to their home *** all feeding was observed on ***,males preferred the genera Leontodon and Crepis,while females preferred Leontodon and *** from this sexual difference in foraging,individuals of both sexes were found to be more or less specialised on nectar *** activity was generally greater in males than ***,we think that sex-specific requirements in nectar ingredients exist,that is,sugar for the intensive flight activity of males and amino acids for egg production of females.

关键词： foraging behavior mark-release-recapture movement patterns nectar source specialization sexual dimorphism

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medical foods in Alzheimer’s disease

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Food Science and Human Wellness 2019年第1期8卷 1-7页

作者： Klaus W.Lange Jianjun Guo Shigehiko Kanaya katharina m.Lange Yukiko Nakamura Shiming Li Department of Experimental Psychology University of Regensburg93040 RegensburgGermany China Institute of Sport Science BeijingChina Graduate School of Information Science Nara Institute of Science and TechnologyIkomaJapan Department of Psychology University of WinchesterWinchesterUnited Kingdom Department of Food Science Rutgers UniversityNew BrunswickNJUSA

Alzheimer’s disease(AD)is the most prevalent cause of dementia *** achieving a marked improvement in symptoms or preventing or delaying the progression of the disease are not *** diet-related risk factors for AD have been *** for a protective effect of the mediterranean diet on AD risk is *** foods are designed to meet specific dietary needs for certain *** in symptomatology and regional brain atrophy in AD have been claimed for several medical foods,for example,those providing ketone bodies as alternative energy supply to neurons,those containing precursors believed to improve synaptic function,and those addressing oxidative stress related to memory *** methodological shortcomings render the interpretation of the available findings of medical food trials in AD *** results of medical foods in AD may be expected when administered in presymptomatic or early stages of the *** requires the reliable identification of minimal neuropathological changes related to *** outcome measures currently used may not be able to detect subtle changes in cognition and function in early ***-scale clinical studies using valid,sensitive,and reliable assessment tools are needed to establish the efficacy of medical foods in AD.

关键词： Alzheimer’s disease Ketogenic diet medical foods mediterranean diet Nutrition

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Evaluating Emissions of Nitrous Oxide from Cropland Soils Under Different Rotations in mato Grosso, Brazil:A Scenario Simulation Study

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Pedosphere 2019年第4期29卷 432-443页

作者： katharina H. E. mEURER Eric BOENECKE Uwe FRANKO Department of Ecology Swedish University of Agricultural Sciences Uppsala 75007 (Sweden) Department of Soil System Science Helmholtz Center for Environmental Research (UFZ) Halle (Saale) 06120 (Germany)

Expansion of cropland involves immense land use changes, and the resulting intensified management practices have a strong influence on the functioning of the underlying soil. For instance, increased application of nitrogen(N) fertilizer is known to enhance fluxes of nitrous oxide(N2O) from the soil to the atmosphere. The emission factor(EF) proposed by the Intergovernmental Panel on Climate Change(IPCC) assumes a linear relationship between added N and N2O-N fluxes, but it does not account for environmental factors, such as soil properties or climate. Due to the high spatial and temporal variability of N2O-N fluxes, mechanistic models are preferable in terms of extrapolation to larger scales. In this study, we evaluated simulated N2O-N fluxes from soils under agricultural use in the Brazilian state, mato Grosso, using the CANDY(Carbon and Nitrogen Dynamics) model. A control tool was developed in order to enable the simulation of 1 650 scenarios covering different sites(soil + climate) and management regimes(crop rotation +amount of applied fertilizer + sowing and harvesting dates). Results suggested that the sites had a very strong influence on calculated emissions, which is not accounted for by static EF. Furthermore, most fertilizer-induced N2O-N fluxes derived from the scenario simulations were best described by a non-linear function. For sounder budgeting on the federal and national scale, there is still a strong need for long-term observations of continuous crop rotations and spatial distribution of soil types and their specific characteristics. The presented results provide a valuable starting point for developing further scenario simulations and adapting experimental campaigns for N2O emission study.

关键词： agricultural systems Carbon and Nitrogen Dynamics CANDY model climate emission factor management soil property soil types

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Cortisol levels in skimmed milk during the first 22 weeks of lactation and response to short-term metabolic stress and lameness in dairy cows

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Journal of Animal Science and Biotechnology 2015年第4期6卷 485-491页

作者： katharina Gellrich Tanja Sigl Heinrich H.D.meyer Steffi Wiedemann Physiology Weihenstephan Technische Universitaet Muenchen Animal Health Institute of Animal Breeding and HusbandryKiel University

Background： Cortisol is secreted into blood in reaction to acute stress, but also in phases of diminished feed intake and changed animal behavior. As cows do not always show clear signs of discomfort, reliable diagnostic markers could be used to provide information regarding individual cows＇ distress. The objective of this study was to establish an ether free immunoassay for the detection of cortisol and to determine values during the first 22 weeks of lactation. Furthermore, the response in milk cortisol levels was assessed during times of metabolic stress and pain associated symptoms of lameness. methods： milk yield and composition, blood serum glucose, NEFA and BHBA as well as milk cortisol were determined in 24 multiparous Holstein-Friesian cows over the course of the first 22 weeks of lactation. Animals were further checked for signs of clinical diseases on a daily basis. Two feed restrictions over three days （FR; 70 % of precious ad libitum intake） were performed during the 4th wk and the 21st wk, respectively. An ELISA for cortisol measurement in easily accessible bovine skimmed milk was established and applied. Results： On the last day of FR in early lactation, a reduction in milk yield and changes in serum metabolites compared to respective previous values were detected. The FR in mid-lactation resulted in no changes in milk production and serum metabolites. milk cortisol was highest during first wk of lactation and remained on comparable levels thereafter. milk yield and composition were not influenced by FR. Lameness resulted in enhanced milk cortisol levels. Conclusion： milk cortisol could be used as an indicator of painful symptoms such as lameness. Higher values of milk cortisol levels during first wk of lactation should be taken into account for interpretation.

关键词： Cortisol Dairy cow ELISA Feed restriction milk

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Living kidney donor assessment:Kidney length vs differential function

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World Journal of Transplantation 2020年第6期10卷 173-182页

作者： Jacob A Akoh katharina J Schumacher Department of Surgery Derriford HospitalUniversity Hospitals Plymouth NHS TrustPlymouth PL68DHDevonUnited Kingdom South West Transplant Centre Derriford HospitalUniversity Hospitals Plymouth NHS TrustPlymouth PL68DHDevonUnited Kingdom

BACKGROUND The key question in living kidney donor assessment is how best to determine the contribution of each kidney to overall renal function and guide selection of which kidney to donate,ensuring safety of procedure and good outcome for both recipient and *** is thought that a length difference>2 cm may indicate significant difference in function and therefore need for measurement of differential *** To determine the effect of using kidney length to decide which kidney to donate in a retrospective cohort of potential *** All 333 potential living kidney donors between January 2009 and August 2018 who completed assessment were retrospectively *** assessment was performed as per United Kingdom *** included age,sex,kidney length(cranio-caudal)obtained by computed tomography/ultrasonography,51-chromium ethylenediamine tetraacetatic acid measured glomerular filtration rate,mercapto acetyl tri glycine split function and vascular *** were 48 exclusions due to inadequate data or incomplete *** analysis was performed using Excel pivot tables and GraphPad *** between kidney length and differential function was determined with Pearson’s correlation *** Of 285 potential donors included in the study,there were 144 males(mean age 49.9±14.75)and 141 females(mean age 51.2±11.23).Overall,the Pearson’s correlation between differences in length and divided function of kidney pairs was 0.1630,P=*** 73 with significant difference(>10%)in divided function,18(24.7%)had no difference in kidney length;54(74%)had a difference ofm and only one of>2 *** a length difference of>1 cm would only predict significant difference in divided function in 8/34(23.5%)of *** a difference of>2 cm as cut off for performing split function would lead to false reassurance in 72 patients(6 had>20%difference in divided function whereas 66 had 10%-20%difference).CONCLUSION Lengt

关键词： Kidney transplantation Living kidney donor assessment Kidney length Kidney volume Differential function Glomerular filtration rate

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Consensus views on competencies and teaching methods for an interprofessional curriculum on complementary and integrative medicine:A Delphi study

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Journal of Integrative medicine 2021年第3期19卷 282-290页

作者： Angelika Homberg Katja Krug Nadja Klafke katharina Glassen Cornelia mahler Svetla Loukanova Department of General Practice and Health Services Research University Hospital HeidelbergHeidelberg69120 HeidelbergGermany Department of Nursing Science University Hospital Tübingen72076 TubingenGermany

Objective:A collaborative team is necessary to help patients achieve their healthcare goals using complementary *** present,healthcare professionals do not feel sufficiently qualified to provide this *** study sought to identify competencies and teaching methods for interprofessional training on complementary and integrative medicine at medical ***:Sixty-five German-speaking experts with various professional backgrounds were invited to take part in a three-round Delphi *** the first round,predefined competencies were assessed on a seven-point Likert scale,and participants were invited to propose additional competencies that would be evaluated in the subsequent *** competencies were ranked based on the participant assessments and were assigned to four relevance *** the second and third rounds,suitable teaching methods were identified using free-text fields and multiple-choice *** a final workshop,participants synthesized the outcomes of the previous sessions and derived key competencies that would be a benefit to undergraduate interprofessional training in complementary and integrative medicine at medical ***:The three rounds plus final worksop were attended by 50,40,36 and 11 *** competencies that these experts determined to be highly relevant to teaching complementary and integrative medicine emphasized,in particular,the respectful treatment of patients and the importance of taking a medical *** these highly relevant competencies,three key targets were agreed upon in the final workshop:students are able to 1)classify and assess complementary medical terms and methods;2)work collaboratively and integrate patients into the interprofessional team;3)involve patients and their relatives respectfully and empathetically in all healthcare *** achieve these competency goals,the following teaching methods were highlighted:students discuss therapy options based on authentic patient c

关键词： Undergraduate education Interprofessional education Complementary medicine Delphi study Curriculum Competency

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A Toolbox for the Analysis of Peptide Signa Biogenesis

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molecular Plant 2017年第8期10卷 1023-1025页

作者： Nils Stuhrvvohldt katharina Schardon Annick Stintzi Andreas Schaller Institute of Plant Physiology and Biotechnology University of Hohenheim 70593 Stuttgart Germany

Peptides are emerging as a novel class of extracellular signaling molecules for ceil-to-cell communication in plants. As peptide hormones, they contribute to the control of plant growth and development, and to the interaction of plants with their biotic and abiotic environment. many new signaling peptides have been identified in recent years and considerable progress has been made with respect to the characterization of signal perception and transduction mechanisms culminating in crystal structures for several peptide receptor complexes. However,

关键词： CELL-DEATH PROTEASE ARABIDOPSIS

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Non-linear affine processes with jumps

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Probability, Uncertainty and Quantitative Risk 2023年第2期8卷 235-266页

作者： Francesca Biagini Georg Bollweg katharina Oberpriller Workgroup Financial and Insurance mathematics Department of MathematicsLudwig-Maximilians-Universität MünchenTheresienstrasse 3980333 MunichGermany University of Freiburg Ernst-Zermelo-Strasse 179104 FreiburgGermany

We present a probabilistic construction of R^(d)-valued non-linear affine processes with *** a setΘof affine parameters,we define a family of sublinear expectations on the Skorokhod space under which the canonical process X is a(sublinear)markov process with a non-linear *** yields a tractable model for Knightian uncertainty for which the sublinear expectation of a markovian functional can be calculated via a partial integro-differential equation.

关键词： Sublinear expectation Non-linear affine processes Dynamic programming PIDE

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