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  1. Article ; Online: Spike D614G - A Candidate Vaccine Antigen Against Covid-19.

    Koenig, Paul-Albert / Schmidt, Florian I

    The New England journal of medicine

    2021  Volume 384, Issue 24, Page(s) 2349–2351

    MeSH term(s) COVID-19 ; Humans ; SARS-CoV-2 ; Spike Glycoprotein, Coronavirus ; Vaccines
    Chemical Substances Spike Glycoprotein, Coronavirus ; Vaccines ; spike protein, SARS-CoV-2
    Language English
    Publishing date 2021-06-11
    Publishing country United States
    Document type Journal Article ; Comment
    ZDB-ID 207154-x
    ISSN 1533-4406 ; 0028-4793
    ISSN (online) 1533-4406
    ISSN 0028-4793
    DOI 10.1056/NEJMcibr2106054
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Protein quality control in the endoplasmic reticulum.

    Koenig, Paul-Albert / Ploegh, Hidde L

    F1000prime reports

    2014  Volume 6, Page(s) 49

    Abstract: THE TOPOLOGICAL BARRIERS DEFINED BY BIOLOGICAL MEMBRANES ARE NOT IMPERMEABLE: from small solutes to intact proteins, specialized transport and translocation mechanisms adjust to the cell's needs. Here, we review the removal of unwanted proteins from the ... ...

    Abstract THE TOPOLOGICAL BARRIERS DEFINED BY BIOLOGICAL MEMBRANES ARE NOT IMPERMEABLE: from small solutes to intact proteins, specialized transport and translocation mechanisms adjust to the cell's needs. Here, we review the removal of unwanted proteins from the endoplasmic reticulum (ER) and emphasize the need to extend observations from tissue culture models and simple eukaryotes to studies in whole animals. The variation in protein production and composition that characterizes different cell types and tissues requires tailor-made solutions to exert proper control over both protein synthesis and breakdown. The ER is an organelle essential to achieve and maintain such homeostasis.
    Language English
    Publishing date 2014-07-08
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 2709303-7
    ISSN 2051-7599
    ISSN 2051-7599
    DOI 10.12703/P6-49
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Structural and mechanistic analysis of a tripartite ATP-independent periplasmic TRAP transporter

    Martin F. Peter / Jan A. Ruland / Peer Depping / Niels Schneberger / Emmanuele Severi / Jonas Moecking / Karl Gatterdam / Sarah Tindall / Alexandre Durand / Veronika Heinz / Jan Peter Siebrasse / Paul-Albert Koenig / Matthias Geyer / Christine Ziegler / Ulrich Kubitscheck / Gavin H. Thomas / Gregor Hagelueken

    Nature Communications, Vol 13, Iss 1, Pp 1-

    2022  Volume 15

    Abstract: Tripartite ATP-independent periplasmic (TRAP) transporters are widespread in bacteria and archaea. Here, the authors used cryo-EM and a range of biophysical techniques to study the structure of function of the sialic acid TRAP transporter HiSiaQM. ...

    Abstract Tripartite ATP-independent periplasmic (TRAP) transporters are widespread in bacteria and archaea. Here, the authors used cryo-EM and a range of biophysical techniques to study the structure of function of the sialic acid TRAP transporter HiSiaQM.
    Keywords Science ; Q
    Language English
    Publishing date 2022-08-01T00:00:00Z
    Publisher Nature Portfolio
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: Posttranscriptional Regulation of Glycoprotein Quality Control in the Endoplasmic Reticulum Is Controlled by the E2 Ub-Conjugating Enzyme UBC6e.

    Hagiwara, Masatoshi / Ling, Jingjing / Koenig, Paul-Albert / Ploegh, Hidde L

    Molecular cell

    2016  Volume 63, Issue 5, Page(s) 753–767

    Abstract: ER-associated degradation (ERAD) is essential for protein quality control in the ER, not only when the ER is stressed, but also at steady state. We report a new layer of homeostatic control, in which ERAD activity itself is regulated ... ...

    Abstract ER-associated degradation (ERAD) is essential for protein quality control in the ER, not only when the ER is stressed, but also at steady state. We report a new layer of homeostatic control, in which ERAD activity itself is regulated posttranscriptionally and independently of the unfolded protein response by adjusting the endogenous levels of EDEM1, OS-9, and SEL1L (ERAD enhancers). Functional UBC6e requires its precise location in the ER to form a supramolecular complex with Derlin2. This complex targets ERAD enhancers for degradation, a function that depends on UBC6e's enzymatic activity. Ablation of UBC6e causes upregulation of active ERAD enhancers and so increases clearance not only of terminally misfolded substrates, but also of wild-type glycoproteins that fold comparatively slowly in vitro and in vivo. The levels of proteins that comprise the ERAD machinery are thus carefully tuned and adjusted to prevailing needs.
    MeSH term(s) Animals ; Endoplasmic Reticulum/metabolism ; Endoplasmic Reticulum-Associated Degradation ; Fibroblasts/cytology ; Fibroblasts/metabolism ; Genetic Vectors/chemistry ; Genetic Vectors/metabolism ; Glycosylation ; HEK293 Cells ; Humans ; Lectins/genetics ; Lectins/metabolism ; Lentivirus/genetics ; Lentivirus/metabolism ; Membrane Proteins/genetics ; Membrane Proteins/metabolism ; Mice ; Neoplasm Proteins/genetics ; Neoplasm Proteins/metabolism ; Protein Processing, Post-Translational ; Proteins/genetics ; Proteins/metabolism ; Proteolysis ; Ubiquitin-Conjugating Enzymes/deficiency ; Ubiquitin-Conjugating Enzymes/genetics ; Unfolded Protein Response
    Chemical Substances DERL2 protein, human ; EDEM1 protein, human ; Lectins ; Membrane Proteins ; Neoplasm Proteins ; OS9 protein, human ; Proteins ; SEL1L protein, human ; UBE2J1 protein, human (EC 2.3.2.23) ; Ubiquitin-Conjugating Enzymes (EC 2.3.2.23)
    Language English
    Publishing date 2016-09-01
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1415236-8
    ISSN 1097-4164 ; 1097-2765
    ISSN (online) 1097-4164
    ISSN 1097-2765
    DOI 10.1016/j.molcel.2016.07.014
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Structural and mechanistic analysis of a tripartite ATP-independent periplasmic TRAP transporter.

    Peter, Martin F / Ruland, Jan A / Depping, Peer / Schneberger, Niels / Severi, Emmanuele / Moecking, Jonas / Gatterdam, Karl / Tindall, Sarah / Durand, Alexandre / Heinz, Veronika / Siebrasse, Jan Peter / Koenig, Paul-Albert / Geyer, Matthias / Ziegler, Christine / Kubitscheck, Ulrich / Thomas, Gavin H / Hagelueken, Gregor

    Nature communications

    2022  Volume 13, Issue 1, Page(s) 4471

    Abstract: Tripartite ATP-independent periplasmic (TRAP) transporters are found widely in bacteria and archaea and consist of three structural domains, a soluble substrate-binding protein (P-domain), and two transmembrane domains (Q- and M-domains). HiSiaPQM and ... ...

    Abstract Tripartite ATP-independent periplasmic (TRAP) transporters are found widely in bacteria and archaea and consist of three structural domains, a soluble substrate-binding protein (P-domain), and two transmembrane domains (Q- and M-domains). HiSiaPQM and its homologs are TRAP transporters for sialic acid and are essential for host colonization by pathogenic bacteria. Here, we reconstitute HiSiaQM into lipid nanodiscs and use cryo-EM to reveal the structure of a TRAP transporter. It is composed of 16 transmembrane helices that are unexpectedly structurally related to multimeric elevator-type transporters. The idiosyncratic Q-domain of TRAP transporters enables the formation of a monomeric elevator architecture. A model of the tripartite PQM complex is experimentally validated and reveals the coupling of the substrate-binding protein to the transporter domains. We use single-molecule total internal reflection fluorescence (TIRF) microscopy in solid-supported lipid bilayers and surface plasmon resonance to study the formation of the tripartite complex and to investigate the impact of interface mutants. Furthermore, we characterize high-affinity single variable domains on heavy chain (VHH) antibodies that bind to the periplasmic side of HiSiaQM and inhibit sialic acid uptake, providing insight into how TRAP transporter function might be inhibited in vivo.
    MeSH term(s) Adenosine Triphosphate/metabolism ; Archaea/metabolism ; Bacteria/metabolism ; Bacterial Proteins/metabolism ; Carrier Proteins/metabolism ; Membrane Transport Proteins/metabolism ; N-Acetylneuraminic Acid/metabolism
    Chemical Substances Bacterial Proteins ; Carrier Proteins ; Membrane Transport Proteins ; Adenosine Triphosphate (8L70Q75FXE) ; N-Acetylneuraminic Acid (GZP2782OP0)
    Language English
    Publishing date 2022-08-04
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-022-31907-y
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Posttranscriptional Regulation of Glycoprotein Quality Control in the Endoplasmic Reticulum Is Controlled by the E2 Ub-Conjugating Enzyme UBC6e

    Hagiwara, Masatoshi / Hidde L. Ploegh / Jingjing Ling / Paul-Albert Koenig

    Molecular cell. 2016 Sept. 01, v. 63, no. 5

    2016  

    Abstract: ER-associated degradation (ERAD) is essential for protein quality control in the ER, not only when the ER is stressed, but also at steady state. We report a new layer of homeostatic control, in which ERAD activity itself is regulated ... ...

    Abstract ER-associated degradation (ERAD) is essential for protein quality control in the ER, not only when the ER is stressed, but also at steady state. We report a new layer of homeostatic control, in which ERAD activity itself is regulated posttranscriptionally and independently of the unfolded protein response by adjusting the endogenous levels of EDEM1, OS-9, and SEL1L (ERAD enhancers). Functional UBC6e requires its precise location in the ER to form a supramolecular complex with Derlin2. This complex targets ERAD enhancers for degradation, a function that depends on UBC6e’s enzymatic activity. Ablation of UBC6e causes upregulation of active ERAD enhancers and so increases clearance not only of terminally misfolded substrates, but also of wild-type glycoproteins that fold comparatively slowly in vitro and in vivo. The levels of proteins that comprise the ERAD machinery are thus carefully tuned and adjusted to prevailing needs.
    Keywords endoplasmic reticulum ; enzyme activity ; glycoproteins ; quality control ; unfolded protein response
    Language English
    Dates of publication 2016-0901
    Size p. 753-767.
    Publishing place Elsevier Inc.
    Document type Article
    ZDB-ID 1415236-8
    ISSN 1097-4164 ; 1097-2765
    ISSN (online) 1097-4164
    ISSN 1097-2765
    DOI 10.1016/j.molcel.2016.07.014
    Database NAL-Catalogue (AGRICOLA)

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  7. Article ; Online: The fungal peptide toxin Candidalysin activates the NLRP3 inflammasome and causes cytolysis in mononuclear phagocytes

    Lydia Kasper / Annika König / Paul-Albert Koenig / Mark S. Gresnigt / Johannes Westman / Rebecca A. Drummond / Michail S. Lionakis / Olaf Groß / Jürgen Ruland / Julian R. Naglik / Bernhard Hube

    Nature Communications, Vol 9, Iss 1, Pp 1-

    2018  Volume 20

    Abstract: Phagocytic cells of the innate immune system play critical roles in defence against invading pathogens including the opportunistic pathogen Candida albicans. Here the authors show that C. albicans derived Candidalysin in addition to being a cell-damaging ...

    Abstract Phagocytic cells of the innate immune system play critical roles in defence against invading pathogens including the opportunistic pathogen Candida albicans. Here the authors show that C. albicans derived Candidalysin in addition to being a cell-damaging toxin to mononuclear phagocytes is a trigger of NLRP3 inflammasome activation in these cells.
    Keywords Science ; Q
    Language English
    Publishing date 2018-10-01T00:00:00Z
    Publisher Nature Portfolio
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article ; Online: The fungal peptide toxin Candidalysin activates the NLRP3 inflammasome and causes cytolysis in mononuclear phagocytes.

    Kasper, Lydia / König, Annika / Koenig, Paul-Albert / Gresnigt, Mark S / Westman, Johannes / Drummond, Rebecca A / Lionakis, Michail S / Groß, Olaf / Ruland, Jürgen / Naglik, Julian R / Hube, Bernhard

    Nature communications

    2018  Volume 9, Issue 1, Page(s) 4260

    Abstract: Clearance of invading microbes requires phagocytes of the innate immune system. However, successful pathogens have evolved sophisticated strategies to evade immune killing. The opportunistic human fungal pathogen Candida albicans is efficiently ... ...

    Abstract Clearance of invading microbes requires phagocytes of the innate immune system. However, successful pathogens have evolved sophisticated strategies to evade immune killing. The opportunistic human fungal pathogen Candida albicans is efficiently phagocytosed by macrophages, but causes inflammasome activation, host cytolysis, and escapes after hypha formation. Previous studies suggest that macrophage lysis by C. albicans results from early inflammasome-dependent cell death (pyroptosis), late damage due to glucose depletion and membrane piercing by growing hyphae. Here we show that Candidalysin, a cytolytic peptide toxin encoded by the hypha-associated gene ECE1, is both a central trigger for NLRP3 inflammasome-dependent caspase-1 activation via potassium efflux and a key driver of inflammasome-independent cytolysis of macrophages and dendritic cells upon infection with C. albicans. This suggests that Candidalysin-induced cell damage is a third mechanism of C. albicans-mediated mononuclear phagocyte cell death in addition to damage caused by pyroptosis and the growth of glucose-consuming hyphae.
    MeSH term(s) Actins/metabolism ; Animals ; Bone Marrow Cells/drug effects ; Bone Marrow Cells/metabolism ; Caspase 1/metabolism ; Cell Death/drug effects ; Dendritic Cells/drug effects ; Dendritic Cells/metabolism ; Female ; Fungal Proteins/toxicity ; Humans ; Inflammasomes/metabolism ; Inflammation/pathology ; Interleukin-1beta/metabolism ; Leukocytes, Mononuclear/cytology ; Leukocytes, Mononuclear/drug effects ; Leukocytes, Mononuclear/metabolism ; Macrophages/drug effects ; Macrophages/metabolism ; Mice, Inbred C57BL ; Mycotoxins/toxicity ; NLR Family, Pyrin Domain-Containing 3 Protein/metabolism ; Necrosis ; Phagocytes/cytology ; Phagocytes/drug effects ; Phagocytes/metabolism ; Phagosomes/drug effects ; Phagosomes/metabolism ; Potassium/pharmacology
    Chemical Substances Actins ; ECE1 protein, Candida albicans ; Fungal Proteins ; Inflammasomes ; Interleukin-1beta ; Mycotoxins ; NLR Family, Pyrin Domain-Containing 3 Protein ; Caspase 1 (EC 3.4.22.36) ; Potassium (RWP5GA015D)
    Language English
    Publishing date 2018-10-15
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-018-06607-1
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Amino acid copolymers that alleviate experimental autoimmune encephalomyelitis in vivo interact with heparan sulfates and glycoprotein 96 in APCs.

    Koenig, Paul-Albert / Spooner, Eric / Kawamoto, Norio / Strominger, Jack L / Ploegh, Hidde L

    Journal of immunology (Baltimore, Md. : 1950)

    2013  Volume 191, Issue 1, Page(s) 208–216

    Abstract: Multiple sclerosis (MS) is an autoimmune disease that affects the CNS. One approved treatment for relapsing forms of MS is YEAK, a random copolymer of the amino acids tyrosine, glutamic acid, alanine, and lysine. YFAK, a second-generation copolymer ... ...

    Abstract Multiple sclerosis (MS) is an autoimmune disease that affects the CNS. One approved treatment for relapsing forms of MS is YEAK, a random copolymer of the amino acids tyrosine, glutamic acid, alanine, and lysine. YFAK, a second-generation copolymer composed of tyrosine, phenylalanine, alanine, and lysine, is more successful in treating experimental autoimmune encephalomyelitis, a mouse model of MS. Although originally designed and optimized based on the autoantigen myelin basic protein (MBP) and the MBP-derived peptide MBP85-99 presented to the MS-associated class II MHC molecule HLA-DR2, YEAK and YFAK also stimulate cytokine and chemokine production in APCs that lack class II MHC products. How YEAK and YFAK copolymers interact with APCs remains enigmatic. We used biotinylated YFAK to affinity-purify YFAK-interacting proteins from RAW264.7 cells and tested APCs from mice deficient in several of the newly identified interactors for their capacity to secrete CCL22 in response to YEAK and YFAK. We propose that initial contact of YFAK with cells is mediated mainly by electrostatic interactions, and find that interaction of YFAK with host proteins is strongly dependent on ionic strength. Cells deficient in enzymes involved in sulfation of proteins and proteoglycans showed strongly reduced binding of biotinylated YFAK. Lastly, cells stimulated with YFAK in the presence of heparin, structurally similar to heparan sulfates, failed to produce CCL22. We conclude that charge-dependent interactions of copolymers that alleviate MS/experimental autoimmune encephalomyelitis are critical for their effects exerted on APCs and may well be the main initial mediators of these therapeutically active copolymers.
    MeSH term(s) Amino Acids/chemistry ; Amino Acids/metabolism ; Amino Acids/pharmacology ; Animals ; Antigen-Presenting Cells/chemistry ; Antigen-Presenting Cells/immunology ; Antigen-Presenting Cells/metabolism ; Biopolymers/chemistry ; Biopolymers/metabolism ; Biopolymers/pharmacology ; Biotinylation ; Cell Line ; Encephalomyelitis, Autoimmune, Experimental/immunology ; Encephalomyelitis, Autoimmune, Experimental/metabolism ; Encephalomyelitis, Autoimmune, Experimental/prevention & control ; Endoplasmic Reticulum/genetics ; Endoplasmic Reticulum/immunology ; Endoplasmic Reticulum/metabolism ; Heparitin Sulfate/metabolism ; Membrane Glycoproteins/deficiency ; Membrane Glycoproteins/metabolism ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Oligopeptides/chemistry ; Oligopeptides/metabolism ; Oligopeptides/pharmacology ; Primary Cell Culture ; Protein Interaction Mapping/methods ; Random Allocation
    Chemical Substances Amino Acids ; Biopolymers ; Membrane Glycoproteins ; Oligopeptides ; endoplasmin ; Heparitin Sulfate (9050-30-0)
    Language English
    Publishing date 2013-06-05
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 3056-9
    ISSN 1550-6606 ; 0022-1767 ; 1048-3233 ; 1047-7381
    ISSN (online) 1550-6606
    ISSN 0022-1767 ; 1048-3233 ; 1047-7381
    DOI 10.4049/jimmunol.1300345
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: A catalytically inactive mutant of the deubiquitylase YOD-1 enhances antigen cross-presentation.

    Sehrawat, Sharvan / Koenig, Paul-Albert / Kirak, Oktay / Schlieker, Christian / Fankhauser, Manuel / Ploegh, Hidde L

    Blood

    2012  Volume 121, Issue 7, Page(s) 1145–1156

    Abstract: Antigen presenting cells (APCs) that express a catalytically inactive version of the deubiquitylase YOD1 (YOD1-C160S) present exogenous antigens more efficiently to CD8(+) T cells, both in vitro and in vivo. Compared with controls, immunization of YOD1- ... ...

    Abstract Antigen presenting cells (APCs) that express a catalytically inactive version of the deubiquitylase YOD1 (YOD1-C160S) present exogenous antigens more efficiently to CD8(+) T cells, both in vitro and in vivo. Compared with controls, immunization of YOD1-C160S mice led to greater expansion of specific CD8(+) T cells and showed improved control of infection with a recombinant -herpes virus, MHV-68, engineered to express SIINFEKL peptide, the ligand for the ovalbumin-specific TCR transgenic OT-I cells. Enhanced expansion of specific CD8(+) T cells was likewise observed on infection of YOD1-C160S mice with a recombinant influenza A virus expressing SIINFEKL. YOD1-C160S APCs retained antigen longer than did control APCs. Enhanced crosspresentation by YOD1-C160S APCs was transporter associated with antigen processing (TAP1)-independent but sensitive to inclusion of inhibitors of acidification and of the proteasome. The activity of deubiquitylating enzymes may thus help control antigenspecific CD8(+) T-cell responses during immunization.
    MeSH term(s) ATP Binding Cassette Transporter, Subfamily B, Member 2 ; ATP-Binding Cassette Transporters/deficiency ; ATP-Binding Cassette Transporters/genetics ; ATP-Binding Cassette Transporters/immunology ; Adoptive Transfer ; Animals ; Antigen-Presenting Cells/enzymology ; Antigen-Presenting Cells/immunology ; Brefeldin A/pharmacology ; CD8-Positive T-Lymphocytes/immunology ; Cross-Priming/drug effects ; Cross-Priming/genetics ; Female ; Hydrogen-Ion Concentration ; Immunization ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Mice, Transgenic ; Mutation, Missense ; Ovalbumin/immunology ; Peptide Fragments/immunology ; Rhadinovirus/immunology ; Rhadinovirus/pathogenicity ; Ubiquitin Thiolesterase/genetics ; Ubiquitin Thiolesterase/immunology ; Ubiquitin Thiolesterase/metabolism
    Chemical Substances ATP Binding Cassette Transporter, Subfamily B, Member 2 ; ATP-Binding Cassette Transporters ; OVA-8 ; Peptide Fragments ; Tap1 protein, mouse ; Brefeldin A (20350-15-6) ; Ovalbumin (9006-59-1) ; Ubiquitin Thiolesterase (EC 3.4.19.12)
    Language English
    Publishing date 2012-12-13
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 80069-7
    ISSN 1528-0020 ; 0006-4971
    ISSN (online) 1528-0020
    ISSN 0006-4971
    DOI 10.1182/blood-2012-08-447409
    Database MEDical Literature Analysis and Retrieval System OnLINE

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