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  1. Article ; Online: Structural insights into functional properties of the oxidized form of cytochrome c oxidase.

    Ishigami, Izumi / Sierra, Raymond G / Su, Zhen / Peck, Ariana / Wang, Cong / Poitevin, Frederic / Lisova, Stella / Hayes, Brandon / Moss, Frank R / Boutet, Sébastien / Sublett, Robert E / Yoon, Chun Hong / Yeh, Syun-Ru / Rousseau, Denis L

    Nature communications

    2023  Volume 14, Issue 1, Page(s) 5752

    Abstract: Cytochrome c oxidase (CcO) is an essential enzyme in mitochondrial and bacterial respiration ...

    Abstract Cytochrome c oxidase (CcO) is an essential enzyme in mitochondrial and bacterial respiration. It catalyzes the four-electron reduction of molecular oxygen to water and harnesses the chemical energy to translocate four protons across biological membranes. The turnover of the CcO reaction involves an oxidative phase, in which the reduced enzyme (R) is oxidized to the metastable O
    MeSH term(s) Electron Transport Complex IV ; Protons ; Cell Membrane ; Crystallography, X-Ray ; Oxygen
    Chemical Substances Electron Transport Complex IV (EC 1.9.3.1) ; Protons ; Oxygen (S88TT14065)
    Language English
    Publishing date 2023-09-16
    Publishing country England
    Document type Journal Article ; Research Support, U.S. Gov't, Non-P.H.S. ; Research Support, N.I.H., Extramural ; 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/s41467-023-41533-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: cMyBP-C ablation in human engineered cardiac tissue causes progressive Ca2+-handling abnormalities.

    De Lange, Willem J / Farrell, Emily T / Hernandez, Jonathan J / Stempien, Alana / Kreitzer, Caroline R / Jacobs, Derek R / Petty, Dominique L / Moss, Richard L / Crone, Wendy C / Ralphe, J Carter

    The Journal of general physiology

    2023  Volume 155, Issue 4

    Abstract: Truncation mutations in cardiac myosin binding protein C (cMyBP-C) are common causes ... cMyBP-C+/-) and homozygous (cMyBP-C-/-) frame-shift mutations into MYBPC3 in human iPSCs. Cardiomyocytes ... sensitivity. While heterozygous frame shifts did not alter cMyBP-C protein levels in 2-D cardiomyocytes, cMyBP ...

    Abstract Truncation mutations in cardiac myosin binding protein C (cMyBP-C) are common causes of hypertrophic cardiomyopathy (HCM). Heterozygous carriers present with classical HCM, while homozygous carriers present with early onset HCM that rapidly progress to heart failure. We used CRISPR-Cas9 to introduce heterozygous (cMyBP-C+/-) and homozygous (cMyBP-C-/-) frame-shift mutations into MYBPC3 in human iPSCs. Cardiomyocytes derived from these isogenic lines were used to generate cardiac micropatterns and engineered cardiac tissue constructs (ECTs) that were characterized for contractile function, Ca2+-handling, and Ca2+-sensitivity. While heterozygous frame shifts did not alter cMyBP-C protein levels in 2-D cardiomyocytes, cMyBP-C+/- ECTs were haploinsufficient. cMyBP-C-/- cardiac micropatterns produced increased strain with normal Ca2+-handling. After 2 wk of culture in ECT, contractile function was similar between the three genotypes; however, Ca2+-release was slower in the setting of reduced or absent cMyBP-C. At 6 wk in ECT culture, the Ca2+-handling abnormalities became more pronounced in both cMyBP-C+/- and cMyBP-C-/- ECTs, and force production became severely depressed in cMyBP-C-/- ECTs. RNA-seq analysis revealed enrichment of differentially expressed hypertrophic, sarcomeric, Ca2+-handling, and metabolic genes in cMyBP-C+/- and cMyBP-C-/- ECTs. Our data suggest a progressive phenotype caused by cMyBP-C haploinsufficiency and ablation that initially is hypercontractile, but progresses to hypocontractility with impaired relaxation. The severity of the phenotype correlates with the amount of cMyBP-C present, with more severe earlier phenotypes observed in cMyBP-C-/- than cMyBP-C+/- ECTs. We propose that while the primary effect of cMyBP-C haploinsufficiency or ablation may relate to myosin crossbridge orientation, the observed contractile phenotype is Ca2+-mediated.
    MeSH term(s) Humans ; Calcium/metabolism ; Tissue Engineering ; Myocardial Contraction ; Carrier Proteins/genetics ; Carrier Proteins/metabolism ; Myocytes, Cardiac/metabolism ; Cardiomyopathy, Hypertrophic ; Mutation
    Chemical Substances Calcium (SY7Q814VUP) ; Carrier Proteins
    Language English
    Publishing date 2023-03-09
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 3118-5
    ISSN 1540-7748 ; 0022-1295
    ISSN (online) 1540-7748
    ISSN 0022-1295
    DOI 10.1085/jgp.202213204
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Discovery and Optimization of the First ATP Competitive Type-III c-MET Inhibitor.

    Michaelides, Iacovos N / Collie, Gavin W / Börjesson, Ulf / Vasalou, Christina / Alkhatib, Omar / Barlind, Louise / Cheung, Tony / Dale, Ian L / Embrey, Kevin J / Hennessy, Edward J / Khurana, Puneet / Koh, Cheryl M / Lamb, Michelle L / Liu, Jianming / Moss, Thomas A / O'Neill, Daniel J / Phillips, Christopher / Shaw, Joseph / Snijder, Arjan /
    Storer, R Ian / Stubbs, Christopher J / Han, Fujin / Li, Chengzhi / Qiao, Jingchuan / Sun, Dong-Qing / Wang, Jingwen / Wang, Peng / Yang, Wenzhen

    Journal of medicinal chemistry

    2023  Volume 66, Issue 13, Page(s) 8782–8807

    Abstract: ... of c-MET kinase for the treatment of cancer. We report herein a novel chemical series of ATP ... competitive type-III inhibitors of WT and D1228V mutant c-MET. Using a combination of structure-based ...

    Abstract Recent clinical reports have highlighted the need for wild-type (WT) and mutant dual inhibitors of c-MET kinase for the treatment of cancer. We report herein a novel chemical series of ATP competitive type-III inhibitors of WT and D1228V mutant c-MET. Using a combination of structure-based drug design and computational analyses, ligand
    MeSH term(s) Rats ; Animals ; Protein Kinase Inhibitors/pharmacology ; Proto-Oncogene Proteins c-met ; Neoplasms ; Drug Design ; Adenosine Triphosphate ; Antineoplastic Agents/pharmacology
    Chemical Substances Protein Kinase Inhibitors ; Proto-Oncogene Proteins c-met (EC 2.7.10.1) ; Adenosine Triphosphate (8L70Q75FXE) ; Antineoplastic Agents
    Language English
    Publishing date 2023-06-21
    Publishing country United States
    Document type Journal Article
    ZDB-ID 218133-2
    ISSN 1520-4804 ; 0022-2623
    ISSN (online) 1520-4804
    ISSN 0022-2623
    DOI 10.1021/acs.jmedchem.3c00401
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  4. Article ; Online: Computational, Mechanistic, and Experimental Insights into Regioselective Catalytic C-C Bond Activation in Linear 1-Aza-[3]triphenylene.

    Ulč, Jan / Asanuma, Yuya / Moss, Robert / Manca, Gabriele / Císařová, Ivana / Kotora, Martin

    ACS omega

    2022  Volume 7, Issue 10, Page(s) 8665–8674

    Abstract: C-C bond activation by transition metal complexes in ring-strained compounds followed by annulation ... However, the site of catalytic C-C bond activation is difficult to predict in unsymmetrically substituted polycyclic systems ... Here, we report a study on the (regio)selective catalytic cleavage of selected C-C bonds in 1-aza-[3 ...

    Abstract C-C bond activation by transition metal complexes in ring-strained compounds followed by annulation with unsaturated compounds is an efficient approach to generate structurally more complex compounds. However, the site of catalytic C-C bond activation is difficult to predict in unsymmetrically substituted polycyclic systems. Here, we report a study on the (regio)selective catalytic cleavage of selected C-C bonds in 1-aza-[3]triphenylene, followed by annulation with alkynes, forming products with extended π-conjugated frameworks. Based on density functional theory (DFT) calculations, we established the stability of possible transition metal intermediates formed by oxidative addition to the C-C bond and thus identified the likely site of C-C bond activation. The computationally predicted selectivity was confirmed by the following experimental tests for the corresponding Ir-catalyzed C-C cleavage reaction followed by an alkyne insertion that yielded mixtures of two mono-insertion products isolated with yields of 34-36%, due to the close reactivity of two bonds during the first C-C bond activation. Similar results were obtained for twofold Ir- or Rh-catalyzed insertion reactions, with higher yields of 72-77%. In a broader context, by combining DFT calculations, which provided insights into the relative reactivity of individual C-C bonds, with experimental results, our approach allows us to synthesize previously unknown pentacyclic azaaromatic compounds.
    Language English
    Publishing date 2022-03-04
    Publishing country United States
    Document type Journal Article
    ISSN 2470-1343
    ISSN (online) 2470-1343
    DOI 10.1021/acsomega.1c06664
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Lung Protection by Cathepsin C Inhibition

    Korkmaz, Brice / Lesner, Adam / Marchand-Adam, Sylvain / Moss, Celia / Jenne, Dieter E.

    Journal of Medicinal Chemistry ; ISSN 0022-2623 1520-4804

    A New Hope for COVID-19 and ARDS? ; Miniperspective

    2020  

    Keywords Molecular Medicine ; Drug Discovery ; covid19
    Language English
    Publisher American Chemical Society (ACS)
    Publishing country us
    Document type Article ; Online
    DOI 10.1021/acs.jmedchem.0c00776
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Online: Seasonality, C:N ratio and plant species influence on denitrification and plant nitrogen uptake in treatment wetlands

    Allen, C.R. / Burr, M.D. / Camper, A.K. / Moss, J.J. / Stein, O.R.

    Ecological Engineering. , p.106946-

    2023  , Page(s) 106946–

    Abstract: ... NH₄-N and 54 NO₃-N) and three organic carbon‑nitrogen (C:N) ratios (0, 1.2, 2.4) was batch-loaded ... and C:N ratio. Strong interactions between independent variables influence interpretation. At a C:N ... microcosms. However, unplanted microcosms showed nearly complete TDN removal at the highest C:N ratio and ...

    Abstract Synthetic wastewater with an average total dissolved nitrogen (TDN) concentration of 72 mg l⁻¹ (18 NH₄-N and 54 NO₃-N) and three organic carbon‑nitrogen (C:N) ratios (0, 1.2, 2.4) was batch-loaded to 72 microcosms planted in monocultures of five plant species or left unplanted. Water quality was measured at 0, 1, 3, 6, 9, and 15 days during 15-day incubations at eight temperature settings ranging from 4 to 24 °C. This allowed for comparisons of TDN removal as influenced by plant species, temperature, and C:N ratio. Strong interactions between independent variables influence interpretation. At a C:N ratio of zero, all plant species significantly increased TDN removal compared to the unplanted microcosms. However, unplanted microcosms showed nearly complete TDN removal at the highest C:N ratio and warm temperatures; removal decreased with decreasing temperature and C:N ratio. TDN removal in Deschampsia cespitosa and Typha latifolia was better but responded similarly to unplanted with respect to temperature and C:N ratio. Conversely, microcosms of Phragmites australis and Schoneoplectus acutus had complete and rapid removal of all applied TDN (177 g N m⁻² yr⁻¹) under all C:N ratios and temperatures. Complete TDN removal was observed in Carex utriculata for all C:N ratios and temperatures except for the coldest temperature (4 °C). However, increasing the C:N ratio at this temperature increased TDN removal. Higher C:N ratios increase TDN removal, likely by increased denitrification, but simultaneously reduce plant biomass and plant uptake of nitrogen. Overall, removal of nitrate was enhanced with organic carbon addition and warm temperature, but specific plant species promoted complete removal even without organic carbon and in winter.
    Keywords Carex utriculata ; Deschampsia cespitosa ; Phragmites australis ; Typha latifolia ; carbon nitrogen ratio ; denitrification ; nitrates ; nitrogen ; organic carbon ; phytomass ; plant nitrogen content ; temperature ; wastewater ; water quality ; winter ; Ammonium ; Carex ; Constructed wetland ; Deschampsia ; Nitrate ; Nitrification ; Phragmites ; Schoenoplectus ; Typha
    Language English
    Publishing place Elsevier B.V.
    Document type Article ; Online
    Note Pre-press version
    ZDB-ID 1127407-4
    ISSN 0925-8574
    ISSN 0925-8574
    DOI 10.1016/j.ecoleng.2023.106946
    Database NAL-Catalogue (AGRICOLA)

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  7. Article ; Online: cMyBP-C phosphorylation modulates the time-dependent slowing of unloaded shortening in murine skinned myocardium.

    Giles, Jasmine / Fitzsimons, Daniel P / Patel, Jitandrakumar R / Knudtsen, Chloe / Neuville, Alexander / Moss, Richard L

    The Journal of general physiology

    2021  Volume 153, Issue 3

    Abstract: In myocardium, phosphorylation of cardiac myosin-binding protein-C (cMyBP-C) is thought to modulate ... Vmax) at saturating Ca2+. To test the idea that cMyBP-C phosphorylation contributes to the activation ... trabecula isolated from mice expressing either wild-type cMyBP-C (tWT), nonphosphorylatable cMyBP-C (t3SA ...

    Abstract In myocardium, phosphorylation of cardiac myosin-binding protein-C (cMyBP-C) is thought to modulate the cooperative activation of the thin filament by binding to myosin and/or actin, thereby regulating the probability of cross-bridge binding to actin. At low levels of Ca2+ activation, unloaded shortening velocity (Vo) in permeabilized cardiac muscle is comprised of an initial high-velocity phase and a subsequent low-velocity phase. The velocities in these phases scale with the level of activation, culminating in a single high-velocity phase (Vmax) at saturating Ca2+. To test the idea that cMyBP-C phosphorylation contributes to the activation dependence of Vo, we measured Vo before and following treatment with protein kinase A (PKA) in skinned trabecula isolated from mice expressing either wild-type cMyBP-C (tWT), nonphosphorylatable cMyBP-C (t3SA), or phosphomimetic cMyBP-C (t3SD). During maximal Ca2+ activation, Vmax was monophasic and not significantly different between the three groups. Although biphasic shortening was observed in all three groups at half-maximal activation under control conditions, the high- and low-velocity phases were faster in the t3SD myocardium compared with values obtained in either tWT or t3SA myocardium. Treatment with PKA significantly accelerated both the high- and low-velocity phases in tWT myocardium but had no effect on Vo in either the t3SD or t3SA myocardium. These results can be explained in terms of a model in which the level of cMyBP-C phosphorylation modulates the extent and rate of cooperative spread of myosin binding to actin.
    MeSH term(s) Animals ; Carrier Proteins/metabolism ; Mice ; Mice, Knockout ; Myocardial Contraction ; Myocardium/metabolism ; Phosphorylation
    Chemical Substances Carrier Proteins
    Language English
    Publishing date 2021-02-18
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 3118-5
    ISSN 1540-7748 ; 0022-1295
    ISSN (online) 1540-7748
    ISSN 0022-1295
    DOI 10.1085/jgp.202012782
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Highly Coupled Heterobicycle-Fused Porphyrin Dimers: Excitonic Coupling and Charge Separation with Coordinated Fullerene, C

    Moss, Austen / Jang, Youngwoo / Arvidson, Jacob / Wang, Hong / D'Souza, Francis

    ChemSusChem

    2023  Volume 16, Issue 8, Page(s) e202202289

    Abstract: Porphyrin dimers have been widely explored and studied owing to their importance in photosynthetic systems. A vast variety of dimers linked by different groups and at different angles have been synthesized and studied; however, the means by which to ... ...

    Abstract Porphyrin dimers have been widely explored and studied owing to their importance in photosynthetic systems. A vast variety of dimers linked by different groups and at different angles have been synthesized and studied; however, the means by which to synthesize rigidly fused porphyrins with direct conjugation of the chromophores remains limited. Such a class of porphyrins may possess interesting properties that unconjugated or stacked dimers may not exhibit. In this study, bisbenzimidazole-fused porphyrin dimers and their mono- and bis-zinc derivatives are synthesized and characterized. As a consequence of excitonic coupling, these dimers exhibit a split Soret band irrespective of the metal ion in the porphyrin cavity. Steady-state fluorescence and excitation spectra followed by femtosecond transient absorption spectral studies of the heterometallated dimer, (free-base and zinc porphyrin) reveals the occurrence of efficient singlet-singlet energy transfer (>95 % efficiency and rate constant >10
    Language English
    Publishing date 2023-03-13
    Publishing country Germany
    Document type Journal Article
    ISSN 1864-564X
    ISSN (online) 1864-564X
    DOI 10.1002/cssc.202202289
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Therapeutic targeting of cathepsin C: from pathophysiology to treatment.

    Korkmaz, Brice / Caughey, George H / Chapple, Iain / Gauthier, Francis / Hirschfeld, Josefine / Jenne, Dieter E / Kettritz, Ralph / Lalmanach, Gilles / Lamort, Anne-Sophie / Lauritzen, Conni / Łȩgowska, Monika / Lesner, Adam / Marchand-Adam, Sylvain / McKaig, Sarah J / Moss, Celia / Pedersen, John / Roberts, Helen / Schreiber, Adrian / Seren, Seda /
    Thakker, Nalin S

    Pharmacology & therapeutics

    2018  Volume 190, Page(s) 202–236

    Abstract: Cathepsin C (CatC) is a highly conserved tetrameric lysosomal cysteine dipeptidyl aminopeptidase ...

    Abstract Cathepsin C (CatC) is a highly conserved tetrameric lysosomal cysteine dipeptidyl aminopeptidase. The best characterized physiological function of CatC is the activation of pro-inflammatory granule-associated serine proteases. These proteases are synthesized as inactive zymogens containing an N-terminal pro-dipeptide, which maintains the zymogen in its inactive conformation and prevents premature activation, which is potentially toxic to the cell. The activation of serine protease zymogens occurs through cleavage of the N-terminal dipeptide by CatC during cell maturation in the bone marrow. In vivo data suggest that pharmacological inhibition of pro-inflammatory serine proteases would suppress or attenuate deleterious effects mediated by these proteases in inflammatory/auto-immune disorders. The pathological deficiency in CatC is associated with Papillon-Lefèvre syndrome (PLS). The patients however do not present marked immunodeficiency despite the absence of active serine proteases in immune defense cells. Hence, the transitory pharmacological blockade of CatC activity in the precursor cells of the bone marrow may represent an attractive therapeutic strategy to regulate activity of serine proteases in inflammatory and immunologic conditions. A variety of CatC inhibitors have been developed both by pharmaceutical companies and academic investigators, some of which are currently being employed and evaluated in preclinical/clinical trials.
    MeSH term(s) Animals ; Autoimmune Diseases/drug therapy ; Autoimmune Diseases/physiopathology ; Cathepsin C/antagonists & inhibitors ; Cathepsin C/metabolism ; Drug Development/methods ; Humans ; Inflammation/drug therapy ; Inflammation/physiopathology ; Papillon-Lefevre Disease/drug therapy ; Papillon-Lefevre Disease/physiopathology ; Serine Proteases/metabolism
    Chemical Substances Serine Proteases (EC 3.4.-) ; Cathepsin C (EC 3.4.14.1)
    Language English
    Publishing date 2018-05-26
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 194735-7
    ISSN 1879-016X ; 0163-7258
    ISSN (online) 1879-016X
    ISSN 0163-7258
    DOI 10.1016/j.pharmthera.2018.05.011
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: α-synuclein aggregates induce c-Abl activation and dopaminergic neuronal loss by a feed-forward redox stress mechanism.

    Ghosh, Soumitra / Won, Seok Joon / Wang, Jiejie / Fong, Rebecca / Butler, Nicholas J M / Moss, Arianna / Wong, Candance / Pan, June / Sanchez, Jennifer / Huynh, Annie / Wu, Long / Manfredsson, Fredric P / Swanson, Raymond A

    Progress in neurobiology

    2021  Volume 202, Page(s) 102070

    Abstract: ... and the protein kinase c-Abl provides a potential amplifying link between these pathogenic factors ... aggregation in neuronal cultures. Exposure to PFFs induced oxidative stress and c-Abl activation in wild-type ... to exhibit either oxidative stress or c-Abl activation. N-acetyl cysteine, a thiol repletion agent ...

    Abstract Oxidative stress and α-synuclein aggregation both drive neurodegeneration in Parkinson's disease, and the protein kinase c-Abl provides a potential amplifying link between these pathogenic factors. Suppressing interactions between these factors may thus be a viable therapeutic approach for this disorder. To evaluate this possibility, pre-formed α-synuclein fibrils (PFFs) were used to induce α-synuclein aggregation in neuronal cultures. Exposure to PFFs induced oxidative stress and c-Abl activation in wild-type neurons. By contrast, α-synuclein - deficient neurons, which cannot form α-synuclein aggregates, failed to exhibit either oxidative stress or c-Abl activation. N-acetyl cysteine, a thiol repletion agent that supports neuronal glutathione metabolism, suppressed the PFF - induced redox stress and c-Abl activation in the wild-type neurons, and likewise suppressed α-synuclein aggregation. Parallel findings were observed in mouse brain: PFF-induced α-synuclein aggregation in the substantia nigra was associated with redox stress, c-Abl activation, and dopaminergic neuronal loss, along with microglial activation and motor impairment, all of which were attenuated with oral N-acetyl cysteine. Similar results were obtained using AAV-mediated α-synuclein overexpression as an alternative means of driving α-synuclein aggregation in vivo. These findings show that α-synuclein aggregates induce c-Abl activation by a redox stress mechanism. c-Abl activation in turn promotes α-synuclein aggregation, in a feed-forward interaction. The capacity of N-acetyl cysteine to interrupt this interaction adds mechanistic support its consideration as a therapeutic in Parkinson's disease.
    MeSH term(s) Animals ; Cysteine ; Dopamine ; Dopaminergic Neurons/metabolism ; Mice ; Oxidation-Reduction ; Parkinson Disease/drug therapy ; Substantia Nigra/metabolism ; alpha-Synuclein/metabolism
    Chemical Substances alpha-Synuclein ; Cysteine (K848JZ4886) ; Dopamine (VTD58H1Z2X)
    Language English
    Publishing date 2021-05-02
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 185535-9
    ISSN 1873-5118 ; 0301-0082
    ISSN (online) 1873-5118
    ISSN 0301-0082
    DOI 10.1016/j.pneurobio.2021.102070
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