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Flechner A, Butschak G, Löffler A, Rühmann J, Nishimura SI, Dölling R, Purfürst B, Goletz S, Danielczyk A, Karsten U. Erratum to "Cluster binding studies with two anti-Thomsen-Friedenreich (anti-core-1, CD176) antibodies: Evidence for a quadruple epitope" [Int. Immunopharmacol. 72 (2019) 186-194]. Int Immunopharmacol 2021; 93:107401. [PMID: 33517225 DOI: 10.1016/j.intimp.2021.107401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- A Flechner
- Glycotope GmbH, 13125 Berlin-Buch, Germany
| | | | - A Löffler
- Glycotope GmbH, 13125 Berlin-Buch, Germany
| | - J Rühmann
- Glycotope GmbH, 13125 Berlin-Buch, Germany
| | - S-I Nishimura
- Faculty of Advanced Life Science, Hokkaido University, Sapporo, Japan
| | - R Dölling
- BIOSYNTAN GmbH, 13125 Berlin-Buch, Germany
| | - B Purfürst
- Max Delbrück Center for Molecular Medicine, Core Facility Electron Microscopy, 13125 Berlin-Buch, Germany
| | - S Goletz
- Glycotope GmbH, 13125 Berlin-Buch, Germany
| | | | - U Karsten
- Glycotope GmbH, 13125 Berlin-Buch, Germany.
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Reggiani D, Blau B, Dölling R, Duperrex PA, Kiselev D, Talanov V, Welte J, Wohlmuther M. Improving beam simulations as well as machine and target protection in the SINQ beam line at PSI-HIPA. JNR 2020. [DOI: 10.3233/jnr-200162] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
With a nominal beam power of nearly 1.4 MW, the PSI High Intensity Proton Accelerator (HIPA) is currently at the forefront of the high intensity frontier of particle accelerators. Key issues of this facility are minimization of beam losses as well as safe operation of the SINQ spallation source. Particular attention is being recently paid towards an improved understanding of the properties of the SINQ beam line by both enhancing the beam transport simulations and developing new diagnostic elements which can also, in some cases, preserve the target integrity by preventing too large beam current density, inaccurate beam steering or improper beam delivery. Moreover, part of the SINQ beam diagnostic concept is being rethought in order to include important missing devices like BPMs. On the simulation side, newly developed composite calculations involving general purpose particle transport programs like MCNPX and BDSIM will deliver insights about beam losses and transmission through collimators. All recent and planned developments of the SINQ beam line will be discussed in this contribution.
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Affiliation(s)
- Davide Reggiani
- Paul Scherrer Institut, CH-5412 Villigen-PSI, Switzerland. E-mail:
| | - Bertrand Blau
- Paul Scherrer Institut, CH-5412 Villigen-PSI, Switzerland. E-mail:
| | - Rudolf Dölling
- Paul Scherrer Institut, CH-5412 Villigen-PSI, Switzerland. E-mail:
| | | | - Daniela Kiselev
- Paul Scherrer Institut, CH-5412 Villigen-PSI, Switzerland. E-mail:
| | - Vadim Talanov
- Paul Scherrer Institut, CH-5412 Villigen-PSI, Switzerland. E-mail:
| | - Jörg Welte
- Paul Scherrer Institut, CH-5412 Villigen-PSI, Switzerland. E-mail:
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Mendelski MN, Dölling R, Feller FM, Hoffmann D, Ramos Fangmeier L, Ludwig KC, Yücel O, Mährlein A, Paul RJ, Philipp B. Steroids originating from bacterial bile acid degradation affect Caenorhabditis elegans and indicate potential risks for the fauna of manured soils. Sci Rep 2019; 9:11120. [PMID: 31366938 PMCID: PMC6668416 DOI: 10.1038/s41598-019-47476-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Accepted: 07/15/2019] [Indexed: 02/08/2023] Open
Abstract
Bile acids are steroid compounds from the digestive tracts of vertebrates that enter agricultural environments in unusual high amounts with manure. Bacteria degrading bile acids can readily be isolated from soils and waters including agricultural areas. Under laboratory conditions, these bacteria transiently release steroid compounds as degradation intermediates into the environment. These compounds include androstadienediones (ADDs), which are C19-steroids with potential hormonal effects. Experiments with Caenorhabditis elegans showed that ADDs derived from bacterial bile acid degradation had effects on its tactile response, reproduction rate, and developmental speed. Additional experiments with a deletion mutant as well as transcriptomic analyses indicated that these effects might be conveyed by the putative testosterone receptor NHR-69. Soil microcosms showed that the natural microflora of agricultural soil is readily induced for bile acid degradation accompanied by the transient release of steroid intermediates. Establishment of a model system with a Pseudomonas strain and C. elegans in sand microcosms indicated transient release of ADDs during the course of bile acid degradation and negative effects on the reproduction rate of the nematode. This proof-of-principle study points at bacterial degradation of manure-derived bile acids as a potential and so-far overlooked risk for invertebrates in agricultural soils.
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Affiliation(s)
- M N Mendelski
- Institute of Zoophysiology, University of Münster (WWU), Münster, Germany
| | - R Dölling
- Institute of Zoophysiology, University of Münster (WWU), Münster, Germany
| | - F M Feller
- Institute of Molecular Microbiology and Biotechnology, University of Münster (WWU), Münster, Germany
| | - D Hoffmann
- Institute of Zoophysiology, University of Münster (WWU), Münster, Germany
| | - L Ramos Fangmeier
- Institute of Zoophysiology, University of Münster (WWU), Münster, Germany
| | - K C Ludwig
- Institute of Molecular Microbiology and Biotechnology, University of Münster (WWU), Münster, Germany.,Institute for Pharmaceutical Microbiology, University Hospital Bonn, University of Bonn, Bonn, Germany
| | - O Yücel
- Institute of Molecular Microbiology and Biotechnology, University of Münster (WWU), Münster, Germany
| | - A Mährlein
- Institute of Molecular Microbiology and Biotechnology, University of Münster (WWU), Münster, Germany
| | - R J Paul
- Institute of Zoophysiology, University of Münster (WWU), Münster, Germany
| | - B Philipp
- Institute of Molecular Microbiology and Biotechnology, University of Münster (WWU), Münster, Germany.
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Affiliation(s)
- Tillmann Michels
- Department of Nuclear Medicine, University Hospital Heidelberg, INF 400, 69120 Heidelberg, Germany, and BIOSYNTAN GmbH, Robert-Rössle-Strasse 10, 13125 Berlin, Germany
| | - Rudolf Dölling
- Department of Nuclear Medicine, University Hospital Heidelberg, INF 400, 69120 Heidelberg, Germany, and BIOSYNTAN GmbH, Robert-Rössle-Strasse 10, 13125 Berlin, Germany
| | - Uwe Haberkorn
- Department of Nuclear Medicine, University Hospital Heidelberg, INF 400, 69120 Heidelberg, Germany, and BIOSYNTAN GmbH, Robert-Rössle-Strasse 10, 13125 Berlin, Germany
| | - Walter Mier
- Department of Nuclear Medicine, University Hospital Heidelberg, INF 400, 69120 Heidelberg, Germany, and BIOSYNTAN GmbH, Robert-Rössle-Strasse 10, 13125 Berlin, Germany
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Junkes C, Harvey RD, Bruce KD, Dölling R, Bagheri M, Dathe M. Cyclic antimicrobial R-, W-rich peptides: the role of peptide structure and E. coli outer and inner membranes in activity and the mode of action. Eur Biophys J 2011; 40:515-28. [PMID: 21286704 DOI: 10.1007/s00249-011-0671-x] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2010] [Revised: 12/07/2010] [Accepted: 01/03/2011] [Indexed: 11/25/2022]
Abstract
This study compares the effect of cyclic R-, W-rich peptides with variations in amino acid sequences and sizes from 5 to 12 residues upon Gram negative and Gram positive bacteria as well as outer membrane-deficient and LPS mutant Escherichia coli (E. coli) strains to analyze the structural determinants of peptide activity. Cyclo-RRRWFW (c-WFW) was the most active and E. coli-selective sequence and bactericidal at the minimal inhibitory concentration (MIC). Removal of the outer membrane distinctly reduced peptide activity and the complete smooth LPS was required for maximal activity. c-WFW efficiently permeabilised the outer membrane of E. coli and promoted outer membrane substrate transport. Isothermal titration calorimetric studies with lipid A-, rough-LPS (r-LPS)- and smooth-LPS (s-LPS)-doped POPC liposomes demonstrated the decisive role of O-antigen and outer core polysaccharides for peptide binding and partitioning. Peptide activity against the inner E. coli membrane (IM) was very low. Even at a peptide to lipid ratio of 8/1, c-WFW was not able to permeabilise a phosphatidylglycerol/phosphatidylethanolamine (POPG/POPE) bilayer. Low influx of propidium iodide (PI) into bacteria confirmed a low permeabilising ability of c-WFW against PE-rich membranes at the MIC. Whilst the peptide effect upon eukaryotic cells correlated with the amphipathicity and permeabilisation of neutral phosphatidylcholine bilayers, suggesting a membrane disturbing mode of action, membrane permeabilisation does not seem to be the dominating antimicrobial mechanism of c-WFW. Peptide interactions with the LPS sugar moieties certainly modulate the transport across the outer membrane and are the basis of the E. coli selectivity of this type of peptides.
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Affiliation(s)
- Christof Junkes
- Leibniz Institute of Molecular Pharmacology (FMP), Robert-Roessle-Str. 10, 13125 Berlin, Germany
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Kaufmann KD, Kunzek H, Dölling R, Halatsch WR, Nieke EM, Rose KB, Bauschke S, Schönherr C. Synthese einer geschützten (Ala12)-Schafinsulin-A-Kette mit präformiertem 6,11-Disulfidring. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/zfch.19800200309] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Coin I, Dölling R, Krause E, Bienert M, Beyermann M, Sferdean CD, Carpino LA. Depsipeptide Methodology for Solid-Phase Peptide Synthesis: Circumventing Side Reactions and Development of an Automated Technique via Depsidipeptide Units,. J Org Chem 2006; 71:6171-7. [PMID: 16872202 DOI: 10.1021/jo060914p] [Citation(s) in RCA: 99] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The depsipeptide technique is a recently developed method for peptide synthesis which is applicable to difficult sequences when the synthetic difficulty arises because of aggregation phenomena. In the present work, application of the depsipeptide method to extremely difficult sequences has been demonstrated and a serious side reaction involving diketopiperazine formation uncovered and subsequently avoided by the appropriate use of the Bsmoc protecting group. Many other aspects of the technique have been investigated, such as the stability of the depsi units during assembly and workup procedures, the completeness of the O-acylation step, the occurrence of epimerization of the amino acid activated during O-acylation, and the nature of side products formed. In addition, the method was modified so as to allow for completely automated syntheses of long-chain depsipeptides without the need for any interruption by manual esterification procedures. Finally, the synthesis efficiency of the new depsipeptide technique was shown to be comparable to that of the well-known pseudoproline technique.
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Affiliation(s)
- Irene Coin
- Leibniz-Institut fuer Molekulare Pharmakologie and Biosyntan GmbH, Robert-Roessle-Str. 10, 13125 Berlin, Germany
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Kaufmann KD, Dölling R. Ein Vergleich verschiedener Kupplungsmethoden bei der Darstellung des N-terminalen Nonapeptides der Schafinsulin-A-Kette durch Fragmentkondensation am polymeren Träger. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/prac.19783200515] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Wieske M, Benndorf R, Behlke J, Dölling R, Grelle G, Bielka H, Lutsch G. Defined sequence segments of the small heat shock proteins HSP25 and alphaB-crystallin inhibit actin polymerization. Eur J Biochem 2001; 268:2083-90. [PMID: 11277931 DOI: 10.1046/j.1432-1327.2001.02082.x] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The interaction of small heat shock proteins (sHSPs) with the actin cytoskeleton has been described and some members of this family, e.g. chicken and murine HSP25 (HSP27), inhibit the polymerization of actin in vitro. To analyse the molecular basis of this interaction, we synthesized a set of overlapping peptides covering the complete sequence of murine HSP25 and tested the effect of these peptides on actin polymerization in vitro by fluorescence spectroscopy and electron microscopy. Two peptides comprising the sequences W43 to R57 (peptide 6) and I92 to N106 (peptide 11) of HSP25 were found to be potent inhibitors of actin polymerization. Phosphorylation of N-terminally extended peptide 11 at serine residues known to be phosphorylated in vivo resulted in decline of their inhibitory activity. Interestingly, peptides derived from the homologous peptide 11 sequence of murine alphaB-crystallin showed the same behaviour. The results suggest that both HSP25 and alphaB-crystallin have the potential to inhibit actin polymerization and that this activity is regulated by phosphorylation.
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Affiliation(s)
- M Wieske
- Max Delbrück Center of Molecular Medicine, Berlin, Germany
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Liebermann H, Mentel R, Bauer U, Pring-Akerblom P, Dölling R, Modrow S, Seidel W. Receptor binding sites and antigenic epitopes on the fiber knob of human adenovirus serotype 3. J Virol 1998; 72:9121-30. [PMID: 9765458 PMCID: PMC110330 DOI: 10.1128/jvi.72.11.9121-9130.1998] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The adenovirus fiber knob causes the first step in the interaction of adenovirus with cell membrane receptors. To obtain information on the receptor binding site(s), the interaction of labeled cell membrane proteins to synthetic peptides covering the adenovirus type 3 (Ad3) fiber knob was studied. Peptide P6 (amino acids [aa] 187 to 200), to a lesser extent P14 (aa 281 to 294), and probably P11 (aa 244 to 256) interacted specifically with cell membrane proteins, indicating that these peptides present cell receptor binding sites. Peptides P6, P11, and P14 span the D, G, and I beta-strands of the R-sheet, respectively. The other reactive peptides, P2 (aa 142 to 156), P3 (aa 153 to 167), and P16 (aa 300 to 319), probably do not present real receptor binding sites. The binding to these six peptides was inhibited by Ad3 virion and was independent of divalent cations. We have also screened the antigenic epitopes on the knob with recombinant Ad3 fiber, recombinant Ad3 fiber knob, and Ad3 virion-specific antisera by enzyme-linked immunosorbent assay. The main antigenic epitopes were presented by P3, P6, P12 (aa 254 to 269), P14, and especially the C-terminal P16. Peptides P14 and P16 of the Ad3 fiber knob were able to inhibit Ad3 infection of cells.
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Affiliation(s)
- H Liebermann
- Institut für Medizinische Mikrobiologie, Ernst-Moritz-Arndt-Universität Greifswald, D-17487 Greifswald, Germany
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Bayrak S, Holmdahl R, Travers P, Lauster R, Hesse M, Dölling R, Mitchison NA. T cell response of I-Aq mice to self type II collagen: meshing of the binding motif of the I-Aq molecule with repetitive sequences results in autoreactivity to multiple epitopes. Int Immunol 1997; 9:1687-99. [PMID: 9418130 DOI: 10.1093/intimm/9.11.1687] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Type II collagen (CII) is of immunological interest because of its repetitive structure and properties as an autoantigen. The mouse gene has recently been cloned, thus enabling T cell-defined epitopes to be identified. Multiple novel epitopes on mouse CII are here detected in the autoreactive T cell response. The major response is directed to an epitope with residues 707-721 located on the CB10 fragment. Some 25 other epitopes are also recognized, including the autologous homologue of the 256-270 epitope which dominates in the response to foreign collagen. The cells reactive with mouse collagen peptides were of Th1 type, as judged by release of IFN-gamma. No significant reactivity was detected to mouse CII peptides during ongoing disease. Alignment of the mouse epitopes revealed a sequence motif with characteristic side chains at residues P1, P4 and P7, and to a lesser extent at P5, within a nonamer core sequence. Binding of these epitopes was simulated in a computer model of the I-Aq molecule, where peptides with anchor residues at P1, P4 and P7 were indeed found to fit the binding groove best. The spacing of pockets and the fine structure of the binding surface of the I-Aq molecule meshes with the repetitive structure of the collagen (X-Y-Gly), thus providing a likely explanation for the occurrence of multiple epitopes. Comparison with human DR binding motifs showed that the I-Aq motif resembles most closely that of the DR4 subtypes which predispose for rheumatoid arthritis.
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Affiliation(s)
- S Bayrak
- Deutsches Rheuma-Forschungszentrum Berlin, Germany
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Reidelbach K, Groβ P, Pozimski J, Jakob A, Dölling R, Klein H. Investigation of space-charge-compensated ion beams with a time-resolving ion energy spectrometer. Fusion Engineering and Design 1996. [DOI: 10.1016/s0920-3796(96)00468-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Dölling R, Beyermann M, Haenel J, Kernchen F, Krause E, Franke P, Brudel M, Bienert M. Piperidine-mediated side product formation for Asp(OBut)-containing peptides. ACTA ACUST UNITED AC 1994. [DOI: 10.1039/c39940000853] [Citation(s) in RCA: 78] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Liebermann H, Dölling R, Schmidt D, Thalmann G. RGD-containing peptides of VP1 of foot-and-mouth disease virus (FMDV) prevent virus infection in vitro. Acta Virol 1991; 35:90-3. [PMID: 1683122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
RGD-containing peptides from the immunodominant region of VP1 between amino acids 135-160 from foot-and-mouth disease virus (FMDV) type O1 Kaufbeuren (O1K) prevented virus adsorption to piglet kidney (PK) cells. The highly conserved amino acid RGD sequence (Arg.-Gly.-Asp.) was a prerequisite of this effect. To prevent infection with 100-200 TCID50 in 10(6) PK cells, 20-250 micrograms of each peptide should have been added.
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Affiliation(s)
- H Liebermann
- Friedrich-Loeffler-Institut, Inself Riems, Fed. Rep. Germany
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Dölling R, Jeschke P, Otto A, Eichler J. An efficient mild acidolytic deprotection procedure for Boc/Bzl-based solid phase peptide synthesis. ACTA ACUST UNITED AC 1990. [DOI: 10.1135/cccc19901792] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Using the mild acidolytic deprotecting reagents 0.1M MSA or 0.1M TMSOTf in TFA in combination with PMB, which simultaneously accelerates the cleavage and acts as irreversible scavenger, the rate of cleavage of a model dipeptide from the appropriate Nα-Fmoc-dipeptidyl resin (polymer-bound benzyl ester, p-MBHA and BHA resin, respectively) was studied. The new deprotecting method was successfully applied to the synthesis of three Nα-halogenoacetyl modified octapeptides (I, II) and a 16-residue peptide (III). In all cases, the crude products were of the same quality as peptides obtained via the HF/10% anisole technique.
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