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Pichot V, Chouchou F, Corbier C, Hupin D, Celle S, Maudoux D, Barthélémy J, Roche F. HP06: Baroreflex sensitivity is predictor of mortality in general elderly population. Clin Neurophysiol 2022. [DOI: 10.1016/j.clinph.2021.11.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Chouchou F, Pichot V, Corbier C, Mauguière F, Rheims S, Mazzola L. HP09: Cardiac reactivity to electric brain stimulations: A SEEG study. Clin Neurophysiol 2022. [DOI: 10.1016/j.clinph.2021.11.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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El Hajj A, Herzine A, Calcagno G, Désor F, Djelti F, Bombail V, Denis I, Oster T, Malaplate C, Vigier M, Kaminski S, Pauron L, Corbier C, Yen FT, Lanhers MC, Claudepierre T. Targeted Suppression of Lipoprotein Receptor LSR in Astrocytes Leads to Olfactory and Memory Deficits in Mice. Int J Mol Sci 2022; 23:ijms23042049. [PMID: 35216163 PMCID: PMC8878779 DOI: 10.3390/ijms23042049] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 02/05/2022] [Accepted: 02/11/2022] [Indexed: 12/25/2022] Open
Abstract
Perturbations of cholesterol metabolism have been linked to neurodegenerative diseases. Glia–neuron crosstalk is essential to achieve a tight regulation of brain cholesterol trafficking. Adequate cholesterol supply from glia via apolipoprotein E-containing lipoproteins ensures neuronal development and function. The lipolysis-stimulated lipoprotein receptor (LSR), plays an important role in brain cholesterol homeostasis. Aged heterozygote Lsr+/− mice show altered brain cholesterol distribution and increased susceptibility to amyloid stress. Since LSR expression is higher in astroglia as compared to neurons, we sought to determine if astroglial LSR deficiency could lead to cognitive defects similar to those of Alzheimer’s disease (AD). Cre recombinase was activated in adult Glast-CreERT/lsrfl/fl mice by tamoxifen to induce astroglial Lsr deletion. Behavioral phenotyping of young and old astroglial Lsr KO animals revealed hyperactivity during the nocturnal period, deficits in olfactory function affecting social memory and causing possible apathy, as well as visual memory and short-term working memory problems, and deficits similar to those reported in neurodegenerative diseases, such as AD. Furthermore, GFAP staining revealed astroglial activation in the olfactory bulb. Therefore, astroglial LSR is important for working, spatial, and social memory related to sensory input, and represents a novel pathway for the study of brain aging and neurodegeneration.
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Affiliation(s)
- Aseel El Hajj
- UR AFPA Laboratory, Qualivie Team, University of Lorraine, 54505 Vandoeuvre-lès-Nancy, France; (A.H.); (F.D.); (F.D.); (T.O.); (C.M.); (M.V.); (L.P.); (C.C.); (F.T.Y.); (M.-C.L.)
- Correspondence: (A.E.H.); (T.C.); Tel.: +33-(0)4-8110-6500 (A.E.H.); +33-(0)3-7274-4152 (T.C.)
| | - Ameziane Herzine
- UR AFPA Laboratory, Qualivie Team, University of Lorraine, 54505 Vandoeuvre-lès-Nancy, France; (A.H.); (F.D.); (F.D.); (T.O.); (C.M.); (M.V.); (L.P.); (C.C.); (F.T.Y.); (M.-C.L.)
| | - Gaetano Calcagno
- UR 7300, Stress Immunity Pathogens Laboratory, Faculty of Medicine, University of Lorraine, 54500 Vandœuvre-lès-Nancy, France; (G.C.); (S.K.)
| | - Frédéric Désor
- UR AFPA Laboratory, Qualivie Team, University of Lorraine, 54505 Vandoeuvre-lès-Nancy, France; (A.H.); (F.D.); (F.D.); (T.O.); (C.M.); (M.V.); (L.P.); (C.C.); (F.T.Y.); (M.-C.L.)
| | - Fathia Djelti
- UR AFPA Laboratory, Qualivie Team, University of Lorraine, 54505 Vandoeuvre-lès-Nancy, France; (A.H.); (F.D.); (F.D.); (T.O.); (C.M.); (M.V.); (L.P.); (C.C.); (F.T.Y.); (M.-C.L.)
| | - Vincent Bombail
- UMR 914, Physiology of Nutrition and Feeding Behaviour, INRAE-Agroparistech-Université Paris-Saclay, 78352 Jouy-en-Josas, France; (V.B.); (I.D.)
| | - Isabelle Denis
- UMR 914, Physiology of Nutrition and Feeding Behaviour, INRAE-Agroparistech-Université Paris-Saclay, 78352 Jouy-en-Josas, France; (V.B.); (I.D.)
| | - Thierry Oster
- UR AFPA Laboratory, Qualivie Team, University of Lorraine, 54505 Vandoeuvre-lès-Nancy, France; (A.H.); (F.D.); (F.D.); (T.O.); (C.M.); (M.V.); (L.P.); (C.C.); (F.T.Y.); (M.-C.L.)
| | - Catherine Malaplate
- UR AFPA Laboratory, Qualivie Team, University of Lorraine, 54505 Vandoeuvre-lès-Nancy, France; (A.H.); (F.D.); (F.D.); (T.O.); (C.M.); (M.V.); (L.P.); (C.C.); (F.T.Y.); (M.-C.L.)
| | - Maxime Vigier
- UR AFPA Laboratory, Qualivie Team, University of Lorraine, 54505 Vandoeuvre-lès-Nancy, France; (A.H.); (F.D.); (F.D.); (T.O.); (C.M.); (M.V.); (L.P.); (C.C.); (F.T.Y.); (M.-C.L.)
| | - Sandra Kaminski
- UR 7300, Stress Immunity Pathogens Laboratory, Faculty of Medicine, University of Lorraine, 54500 Vandœuvre-lès-Nancy, France; (G.C.); (S.K.)
| | - Lynn Pauron
- UR AFPA Laboratory, Qualivie Team, University of Lorraine, 54505 Vandoeuvre-lès-Nancy, France; (A.H.); (F.D.); (F.D.); (T.O.); (C.M.); (M.V.); (L.P.); (C.C.); (F.T.Y.); (M.-C.L.)
| | - Catherine Corbier
- UR AFPA Laboratory, Qualivie Team, University of Lorraine, 54505 Vandoeuvre-lès-Nancy, France; (A.H.); (F.D.); (F.D.); (T.O.); (C.M.); (M.V.); (L.P.); (C.C.); (F.T.Y.); (M.-C.L.)
| | - Frances T. Yen
- UR AFPA Laboratory, Qualivie Team, University of Lorraine, 54505 Vandoeuvre-lès-Nancy, France; (A.H.); (F.D.); (F.D.); (T.O.); (C.M.); (M.V.); (L.P.); (C.C.); (F.T.Y.); (M.-C.L.)
| | - Marie-Claire Lanhers
- UR AFPA Laboratory, Qualivie Team, University of Lorraine, 54505 Vandoeuvre-lès-Nancy, France; (A.H.); (F.D.); (F.D.); (T.O.); (C.M.); (M.V.); (L.P.); (C.C.); (F.T.Y.); (M.-C.L.)
| | - Thomas Claudepierre
- UR AFPA Laboratory, Qualivie Team, University of Lorraine, 54505 Vandoeuvre-lès-Nancy, France; (A.H.); (F.D.); (F.D.); (T.O.); (C.M.); (M.V.); (L.P.); (C.C.); (F.T.Y.); (M.-C.L.)
- Correspondence: (A.E.H.); (T.C.); Tel.: +33-(0)4-8110-6500 (A.E.H.); +33-(0)3-7274-4152 (T.C.)
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El Hajj A, Yen FT, Oster T, Malaplate C, Pauron L, Corbier C, Lanhers MC, Claudepierre T. Age-related changes in regiospecific expression of Lipolysis Stimulated Receptor (LSR) in mice brain. PLoS One 2019; 14:e0218812. [PMID: 31233547 PMCID: PMC6590887 DOI: 10.1371/journal.pone.0218812] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 06/10/2019] [Indexed: 11/18/2022] Open
Abstract
The regulation of cholesterol, an essential brain lipid, ensures proper neuronal development and function, as demonstrated by links between perturbations of cholesterol metabolism and neurodegenerative diseases, including Alzheimer’s disease. The central nervous system (CNS) acquires cholesterol via de novo synthesis, where glial cells provide cholesterol to neurons. Both lipoproteins and lipoprotein receptors are key elements in this intercellular transport, where the latter recognize, bind and endocytose cholesterol containing glia-produced lipoproteins. CNS lipoprotein receptors are like those in the periphery, among which include the ApoB, E binding lipolysis stimulated lipoprotein receptor (LSR). LSR is a multimeric protein complex that has multiple isoforms including α and α’, which are seen as a doublet at 68 kDa, and β at 56 kDa. While complete inactivation of murine lsr gene is embryonic lethal, studies on lsr +/- mice revealed altered brain cholesterol distribution and cognitive functions. In the present study, LSR profiling in different CNS regions revealed regiospecific expression of LSR at both RNA and protein levels. At the RNA level, the hippocampus, hypothalamus, cerebellum, and olfactory bulb, all showed high levels of total lsr compared to whole brain tissues, whereas at the protein level, only the hypothalamus, olfactory bulb, and retina showed the highest levels of total LSR. Interestingly, major regional changes in LSR expression were observed in aged mice which suggests changes in cholesterol homeostasis in specific structures in the aging brain. Immunocytostaining of primary cultures of mature murine neurons and glial cells isolated from different CNS regions showed that LSR is expressed in both neurons and glial cells. However, lsr RNA expression in the cerebellum was predominantly higher in glial cells, which was confirmed by the immunocytostaining profile of cerebellar neurons and glia. Based on this observation, we would propose that LSR in glial cells may play a key role in glia-neuron cross talk, particularly in the feedback control of cholesterol synthesis to avoid cholesterol overload in neurons and to maintain proper functioning of the brain throughout life.
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Affiliation(s)
- Aseel El Hajj
- Qualivie, UR AFPA laboratory, ENSAIA, University of Lorraine, Vandoeuvre-les-Nancy, Lorraine, France
| | - Frances T. Yen
- Qualivie, UR AFPA laboratory, ENSAIA, University of Lorraine, Vandoeuvre-les-Nancy, Lorraine, France
- * E-mail: (TC); (FTY)
| | - Thierry Oster
- Qualivie, UR AFPA laboratory, ENSAIA, University of Lorraine, Vandoeuvre-les-Nancy, Lorraine, France
| | - Catherine Malaplate
- Qualivie, UR AFPA laboratory, ENSAIA, University of Lorraine, Vandoeuvre-les-Nancy, Lorraine, France
| | - Lynn Pauron
- Qualivie, UR AFPA laboratory, ENSAIA, University of Lorraine, Vandoeuvre-les-Nancy, Lorraine, France
| | - Catherine Corbier
- Qualivie, UR AFPA laboratory, ENSAIA, University of Lorraine, Vandoeuvre-les-Nancy, Lorraine, France
| | - Marie-Claire Lanhers
- Qualivie, UR AFPA laboratory, ENSAIA, University of Lorraine, Vandoeuvre-les-Nancy, Lorraine, France
| | - Thomas Claudepierre
- Qualivie, UR AFPA laboratory, ENSAIA, University of Lorraine, Vandoeuvre-les-Nancy, Lorraine, France
- * E-mail: (TC); (FTY)
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De Haan J, Moshage Y, Kluifhooft D, Renken R, Corbier C, Blanchard H, Reyners A. Impact of taste alterations during systemic anti-tumour therapy on the liking of oral nutritional supplements with adapted flavours. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy300.054] [Citation(s) in RCA: 2] [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: 11/14/2022] Open
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Colin J, Allouche A, Chauveau F, Corbier C, Pauron-Gregory L, Lanhers MC, Claudepierre T, Yen FT, Oster T, Malaplate-Armand C. Improved Neuroprotection Provided by Drug Combination in Neurons Exposed to Cell-Derived Soluble Amyloid-β Peptide. J Alzheimers Dis 2017; 52:975-87. [PMID: 27163806 DOI: 10.3233/jad-151110] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Oligomeric amyloid-β (Aβ) peptide contributes to impaired synaptic connections and neurodegenerative processes, and as such, represents a primary therapeutic target for Alzheimer's disease (AD)-modifying approaches. However, the lack of efficacy of drugs that inhibit production of Aβ demonstrates the need for a better characterization of its toxic effects, both on synaptic and neuronal function. Here, we used conditioned medium obtained from recombinant HEK-AβPP cells expressing the human amyloid-β protein precursor (Aβ-CM), to investigate Aβ-induced neurotoxic and synaptotoxic effects. Characterization of Aβ-CM revealed that it contained picomolar amounts of cell-secreted Aβ in its soluble form. Incubation of primary cortical neurons with Aβ-CM led to significant decreases in synaptic protein levels as compared to controls. This effect was no longer observed in neurons incubated with conditioned medium obtained from HEK-AβPP cells grown in presence of the γ-secretase inhibitor, Semagacestat or LY450139 (LY-CM). However, neurotoxic and pro-apoptotic effects of Aβ-CM were only partially prevented using LY-CM, which could be explained by other deleterious compounds related to chronic oxidative stress that were released by HEK-AβPP cells. Indeed, full neuroprotection was observed in cells exposed to LY-CM by additional treatment with the antioxidant resveratrol, or with the pluripotent n-3 polyunsaturated fatty acid docosahexaenoic acid. Inhibition of Aβ production appeared necessary but insufficient to prevent neurodegenerative effects associated with AD due to other neurotoxic compounds that could exert additional deleterious effects on neuronal function and survival. Therefore, association of various types of protective agents needs to be considered when developing strategies for AD treatment.
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Affiliation(s)
- Julie Colin
- Université de Lorraine, ENSAIA, UR AFPA, EA 3998, USC INRA 0340, Nancy, France
| | - Ahmad Allouche
- Université de Lorraine, ENSAIA, UR AFPA, EA 3998, USC INRA 0340, Nancy, France
| | - Fabien Chauveau
- Université de Lyon 1, Lyon Neuroscience Research Center; CNRS UMR5292; INSERM U1028; Lyon, France
| | - Catherine Corbier
- Université de Lorraine, ENSAIA, UR AFPA, EA 3998, USC INRA 0340, Nancy, France
| | - Lynn Pauron-Gregory
- Université de Lorraine, ENSAIA, UR AFPA, EA 3998, USC INRA 0340, Nancy, France
| | | | - Thomas Claudepierre
- Université de Lorraine, ENSAIA, UR AFPA, EA 3998, USC INRA 0340, Nancy, France
| | - Frances T Yen
- Université de Lorraine, ENSAIA, UR AFPA, EA 3998, USC INRA 0340, Nancy, France
| | - Thierry Oster
- Université de Lorraine, ENSAIA, UR AFPA, EA 3998, USC INRA 0340, Nancy, France
| | - Catherine Malaplate-Armand
- Université de Lorraine, ENSAIA, UR AFPA, EA 3998, USC INRA 0340, Nancy, France.,Laboratoire de Biochimie, Hôpital Central, CHU de Nancy, CO n°34, Nancy, France
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Colin J, Thomas MH, Gregory-Pauron L, Pinçon A, Lanhers MC, Corbier C, Claudepierre T, Yen FT, Oster T, Malaplate-Armand C. Maintenance of membrane organization in the aging mouse brain as the determining factor for preventing receptor dysfunction and for improving response to anti-Alzheimer treatments. Neurobiol Aging 2017; 54:84-93. [PMID: 28347928 DOI: 10.1016/j.neurobiolaging.2017.02.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Revised: 02/17/2017] [Accepted: 02/22/2017] [Indexed: 01/01/2023]
Abstract
Although a major risk factor for Alzheimer's disease (AD), the "aging" parameter is not systematically considered in preclinical validation of anti-AD drugs. To explore how aging affects neuronal reactivity to anti-AD agents, the ciliary neurotrophic factor (CNTF)-associated pathway was chosen as a model. Comparison of the neuroprotective properties of CNTF in 6- and 18-month old mice revealed that CNTF resistance in the older animals is associated with the exclusion of the CNTF-receptor subunits from rafts and their subsequent dispersion to non-raft cortical membrane domains. This age-dependent membrane remodeling prevented both the formation of active CNTF-receptor complexes and the activation of prosurvival STAT3 and ERK1/2 pathways, demonstrating that age-altered membranes impaired the reactivity of potential therapeutic targets. CNTF-receptor distribution and CNTF signaling responses were improved in older mice receiving dietary docosahexaenoic acid, with CNTF-receptor functionality being similar to those of younger mice, pointing toward dietary intervention as a promising adjuvant strategy to maintain functional neuronal membranes, thus allowing the associated receptors to respond appropriately to anti-AD agents.
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Affiliation(s)
- Julie Colin
- UR AFPA - INRA USC 340, EA 3998, Équipe Biodisponibilité et Fonctionnalité des Lipides Alimentaires (BFLA), Université de Lorraine, Nancy, France
| | - Mélanie H Thomas
- UR AFPA - INRA USC 340, EA 3998, Équipe Biodisponibilité et Fonctionnalité des Lipides Alimentaires (BFLA), Université de Lorraine, Nancy, France
| | - Lynn Gregory-Pauron
- UR AFPA - INRA USC 340, EA 3998, Équipe Biodisponibilité et Fonctionnalité des Lipides Alimentaires (BFLA), Université de Lorraine, Nancy, France
| | - Anthony Pinçon
- UR AFPA - INRA USC 340, EA 3998, Équipe Biodisponibilité et Fonctionnalité des Lipides Alimentaires (BFLA), Université de Lorraine, Nancy, France
| | - Marie-Claire Lanhers
- UR AFPA - INRA USC 340, EA 3998, Équipe Biodisponibilité et Fonctionnalité des Lipides Alimentaires (BFLA), Université de Lorraine, Nancy, France
| | - Catherine Corbier
- UR AFPA - INRA USC 340, EA 3998, Équipe Biodisponibilité et Fonctionnalité des Lipides Alimentaires (BFLA), Université de Lorraine, Nancy, France
| | - Thomas Claudepierre
- UR AFPA - INRA USC 340, EA 3998, Équipe Biodisponibilité et Fonctionnalité des Lipides Alimentaires (BFLA), Université de Lorraine, Nancy, France
| | - Frances T Yen
- UR AFPA - INRA USC 340, EA 3998, Équipe Biodisponibilité et Fonctionnalité des Lipides Alimentaires (BFLA), Université de Lorraine, Nancy, France
| | - Thierry Oster
- UR AFPA - INRA USC 340, EA 3998, Équipe Biodisponibilité et Fonctionnalité des Lipides Alimentaires (BFLA), Université de Lorraine, Nancy, France
| | - Catherine Malaplate-Armand
- UR AFPA - INRA USC 340, EA 3998, Équipe Biodisponibilité et Fonctionnalité des Lipides Alimentaires (BFLA), Université de Lorraine, Nancy, France; Laboratoire de Biochimie et Biologie Moléculaire, UF Oncologie - Endocrinologie - Neurobiologie, Hôpital Central, Centre Hospitalier Universitaire, Nancy, France.
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Colin J, Gregory-Pauron L, Lanhers MC, Claudepierre T, Corbier C, Yen FT, Malaplate-Armand C, Oster T. Membrane raft domains and remodeling in aging brain. Biochimie 2016; 130:178-187. [DOI: 10.1016/j.biochi.2016.08.014] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Accepted: 08/31/2016] [Indexed: 12/21/2022]
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Akbar S, Pinçon A, Lanhers MC, Claudepierre T, Corbier C, Gregory-Pauron L, Malaplate-Armand C, Visvikis A, Oster T, Yen FT. Expression profile of hepatic genes related to lipid homeostasis in LSR heterozygous mice contributes to their increased response to high-fat diet. Physiol Genomics 2016; 48:928-935. [PMID: 27789735 DOI: 10.1152/physiolgenomics.00077.2016] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Accepted: 10/19/2016] [Indexed: 12/30/2022] Open
Abstract
Perturbations of lipid homeostasis manifest as dyslipidemias and obesity, which are significant risk factors for atherosclerosis and diabetes. Lipoprotein receptors in the liver are key players in the regulation of lipid homeostasis, among which the hepatic lipolysis stimulated lipoprotein receptor, LSR, was recently shown to play an important role in the removal of lipoproteins from the circulation during the postprandial phase. Since heterozygous LSR+/- mice demonstrate moderate dyslipidemia and develop higher body weight gain in response to high-fat diet compared with littermate LSR+/+ controls, we questioned if LSR heterozygosity could affect genes related to hepatic lipid metabolism. A target-specific qPCR array for 84 genes related to lipid metabolism was performed on mRNA isolated from livers of 6 mo old female LSR+/- mice and LSR+/+ littermates following a 6 wk period on a standard (STD) or high-fat diet (60% kcal, HFD). Of the 84 genes studied, 32 were significantly downregulated in STD-LSR+/- mice compared with STD-LSR+/+, a majority of which were PPARα target genes involved in lipid metabolism and transport, and insulin and adipokine-signaling pathways. Of these 32 genes, 80% were also modified in HFD-LSR+/+, suggesting that STD-LSR+/- mice demonstrated a predisposition towards a "high-fat"-like profile, which could reflect dysregulation of liver lipid homeostasis. Since similar profiles of genes were affected by either LSR heterozygosity or by high-fat diet, this would suggest that LSR is a key receptor in regulating hepatic lipid homeostasis, and whose downregulation combined with a Western-type diet may increase predisposition to diet-induced obesity.
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Affiliation(s)
- Samina Akbar
- EA3998 INRA USC 0340 UR AFPA, Université de Lorraine, Vandœuvre-lès-Nancy, France
| | - Anthony Pinçon
- EA3998 INRA USC 0340 UR AFPA, Université de Lorraine, Vandœuvre-lès-Nancy, France
| | - Marie-Claire Lanhers
- EA3998 INRA USC 0340 UR AFPA, Université de Lorraine, Vandœuvre-lès-Nancy, France
| | - Thomas Claudepierre
- EA3998 INRA USC 0340 UR AFPA, Université de Lorraine, Vandœuvre-lès-Nancy, France
| | - Catherine Corbier
- EA3998 INRA USC 0340 UR AFPA, Université de Lorraine, Vandœuvre-lès-Nancy, France
| | - Lynn Gregory-Pauron
- EA3998 INRA USC 0340 UR AFPA, Université de Lorraine, Vandœuvre-lès-Nancy, France
| | | | - Athanase Visvikis
- UMR 7365 CNRS IMOPA, Université de Lorraine, Vandœuvre-lès-Nancy, France
| | - Thierry Oster
- EA3998 INRA USC 0340 UR AFPA, Université de Lorraine, Vandœuvre-lès-Nancy, France
| | - Frances T Yen
- EA3998 INRA USC 0340 UR AFPA, Université de Lorraine, Vandœuvre-lès-Nancy, France; .,INSERM, Nancy, France; and
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Alkhatib R, Corbier C, El Badaoui M, Moslem B, Diab MO. Sensors' Ground Reaction Force behavior for both Normal and Parkinson subjects--A qualitative study. Annu Int Conf IEEE Eng Med Biol Soc 2016; 2015:4186-9. [PMID: 26737217 DOI: 10.1109/embc.2015.7319317] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Characterization of normal and abnormal Gait has been a major research field for decades, whether in fall prevention, sports biomechanics or even disease indication. In this paper, we assess time domain statistical properties of the Vertical Ground Reaction Force (VGRF) during moderate-pace walking, aiming eventually to create a reliable mathematical model of VGRF for normal and abnormal cases. For that endeavor, first order statistical analysis was performed upon signal segmentation in order to determine the degree of stationarity and base the model upon it. Furthermore, we performed curve fitting of the VGRF time series between present and past values, which led us to model the waveform with linear regression via Autoregressive Model for both Normal Walking Signals and Parkinson diseased patients' walking signals. However this is done only for one chosen sensor. However, it would be crucial to take the advantage of the array of sensors. Evaluating the cross-covariance between multi-sensor data of a given subject at different time lags capture the most important information. The seasonality in the values give a quite important indications of the behavior of data. The objective behind this analysis is to recommend a preliminary basis to create reliable mathematical model of normal walking signals versus pathological walking signals, that we will emphasize in a complementary work, in the simplest way available and creating fall prevention indicators for old patients.
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Yen F, Akbar S, Layeghkhavidaki H, Pinçon A, Lanhers M, Oster T, Gregory Pauron L, Corbier C. Role of the Lipolysis Stimulated Lipoprotein Receptor in Hepatic Lipid Homeostasis during the Postprandial Phase. FASEB J 2015. [DOI: 10.1096/fasebj.29.1_supplement.743.2] [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: 11/11/2022]
Affiliation(s)
- Frances Yen
- URAFPA BFLA team University of LorraineVandoeuvre‐lès‐NancyFrance
| | - Samina Akbar
- URAFPA BFLA team University of LorraineVandoeuvre‐lès‐NancyFrance
| | | | - Anthony Pinçon
- URAFPA BFLA team University of LorraineVandoeuvre‐lès‐NancyFrance
| | | | - Thierry Oster
- URAFPA BFLA team University of LorraineVandoeuvre‐lès‐NancyFrance
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Pinçon A, Thomas MH, Huguet M, Allouche A, Colin JC, Georges A, Derrien A, Lanhers MC, Malaplate-Armand C, Oster T, Corbier C, Pillot T, Olivier JL, Yen FT. Increased Susceptibility of Dyslipidemic LSR+/− Mice to Amyloid Stress is Associated with Changes in Cortical Cholesterol Levels. ACTA ACUST UNITED AC 2015; 45:195-204. [DOI: 10.3233/jad-142127] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Anthony Pinçon
- Université de Lorraine, UR AFPA, EA3998, Vandœuvre-lès-Nancy, Frace
- INRA, UR AFPA, USC 0340 INRA, Vandœuvre-lès-Nancy, France
| | - Mélanie H. Thomas
- Université de Lorraine, UR AFPA, EA3998, Vandœuvre-lès-Nancy, Frace
- INRA, UR AFPA, USC 0340 INRA, Vandœuvre-lès-Nancy, France
| | - Marion Huguet
- Université de Lorraine, UR AFPA, EA3998, Vandœuvre-lès-Nancy, Frace
- INRA, UR AFPA, USC 0340 INRA, Vandœuvre-lès-Nancy, France
| | - Ahmad Allouche
- Université de Lorraine, UR AFPA, EA3998, Vandœuvre-lès-Nancy, Frace
- INRA, UR AFPA, USC 0340 INRA, Vandœuvre-lès-Nancy, France
- INSERM, Vandœuvre-lès-Nancy, France
| | - Julie C. Colin
- Université de Lorraine, UR AFPA, EA3998, Vandœuvre-lès-Nancy, Frace
- INRA, UR AFPA, USC 0340 INRA, Vandœuvre-lès-Nancy, France
| | - Alain Georges
- Université de Lorraine, LARSA, IUT-NB, Vandoeuvre-lès-Nancy, France
| | - Annabelle Derrien
- Université de Lorraine, UR AFPA, EA3998, Vandœuvre-lès-Nancy, Frace
- INRA, UR AFPA, USC 0340 INRA, Vandœuvre-lès-Nancy, France
| | - Marie-Claire Lanhers
- Université de Lorraine, UR AFPA, EA3998, Vandœuvre-lès-Nancy, Frace
- INRA, UR AFPA, USC 0340 INRA, Vandœuvre-lès-Nancy, France
| | - Catherine Malaplate-Armand
- Université de Lorraine, UR AFPA, EA3998, Vandœuvre-lès-Nancy, Frace
- INRA, UR AFPA, USC 0340 INRA, Vandœuvre-lès-Nancy, France
- Biochemistry Department, CHU de Nancy, Nancy, France
| | - Thierry Oster
- Université de Lorraine, UR AFPA, EA3998, Vandœuvre-lès-Nancy, Frace
- INRA, UR AFPA, USC 0340 INRA, Vandœuvre-lès-Nancy, France
| | - Catherine Corbier
- Université de Lorraine, UR AFPA, EA3998, Vandœuvre-lès-Nancy, Frace
- INRA, UR AFPA, USC 0340 INRA, Vandœuvre-lès-Nancy, France
| | | | - Jean Luc Olivier
- Université de Lorraine, UR AFPA, EA3998, Vandœuvre-lès-Nancy, Frace
- INRA, UR AFPA, USC 0340 INRA, Vandœuvre-lès-Nancy, France
- Biochemistry Department, CHU de Nancy, Nancy, France
| | - Frances T. Yen
- Université de Lorraine, UR AFPA, EA3998, Vandœuvre-lès-Nancy, Frace
- INRA, UR AFPA, USC 0340 INRA, Vandœuvre-lès-Nancy, France
- INSERM, Vandœuvre-lès-Nancy, France
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13
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Corbier C, El Badaoui M. ARMA modelling and nonparametric probability density function of gait signal using L2-L1 estimator in patients with neurodegenerative disease. Comput Methods Biomech Biomed Engin 2014; 17 Suppl 1:178-9. [PMID: 25074223 DOI: 10.1080/10255842.2014.931666] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- C Corbier
- a Université de Lyon, F-42023 , St-Etienne , France
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14
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Layeghkhavidaki H, Lanhers MC, Akbar S, Gregory-Pauron L, Oster T, Grova N, Appenzeller B, Jasniewski J, Feidt C, Corbier C, Yen FT. Inhibitory action of benzo[α]pyrene on hepatic lipoprotein receptors in vitro and on liver lipid homeostasis in mice. PLoS One 2014; 9:e102991. [PMID: 25054229 PMCID: PMC4108373 DOI: 10.1371/journal.pone.0102991] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Accepted: 06/25/2014] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Dyslipidemia associated with obesity often manifests as increased plasma LDL and triglyceride-rich lipoprotein levels suggesting changes in hepatic lipoprotein receptor status. Persistent organic pollutants have been recently postulated to contribute to the obesity etiology by increasing adipogenesis, but little information is available on their potential effect on hepatic lipoprotein metabolism. OBJECTIVE The objective of this study was to investigate the effect of the common environmental pollutant, benzo[α]pyrene (B[α]P) on two lipoprotein receptors, the LDL-receptor and the lipolysis-stimulated lipoprotein receptor (LSR) as well as the ATP-binding cassette transporter A1 (ABCA1) using cell and animal models. RESULTS LSR, LDL-receptor as well as ABCA1 protein levels were significantly decreased by 26-48% in Hepa1-6 cells incubated (<2 h) in the presence of B[α]P (≤1 µM). Real-time PCR analysis and lactacystin studies revealed that this effect was due primarily to increased proteasome, and not lysosomal-mediated degradation rather than decreased transcription. Furthermore, ligand blots revealed that lipoproteins exposed to 1 or 5 µM B[α]P displayed markedly decreased (42-86%) binding to LSR or LDL-receptor. B[α]P-treated (0.5 mg/kg/48 h, i.p. 15 days) C57BL/6J mice displayed higher weight gain, associated with significant increases in plasma cholesterol, triglycerides, and liver cholesterol content, and decreased hepatic LDL-receptor and ABCA1 levels. Furthermore, correlational analysis revealed that B[α]P abolished the positive association observed in control mice between the LSR and LDL-receptor. Interestingly, levels of other proteins involved in liver cholesterol metabolism, ATP-binding cassette transporter G1 and scavenger receptor-BI, were decreased, while those of acyl-CoA:cholesterol acyltransferase 1 and 2 were increased in B[α]P-treated mice. CONCLUSIONS B[α]P demonstrates inhibitory action on LSR and LDL-R, as well as ABCA1, which we propose leads to modified lipid status in B[α]P-treated mice, thus providing new insight into mechanisms underlying the involvement of pollutants in the disruption of lipid homeostasis, potentially contributing to dyslipidemia associated with obesity.
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Affiliation(s)
- Hamed Layeghkhavidaki
- Unité de Recherche Animal et Fonctionnalités des Produits Animaux EA3998, Université de Lorraine, Vandœuvre-lès-Nancy, France
- Institut National de Recherche Agronomique USC 0340, Vandœuvre-lès-Nancy, France
| | - Marie-Claire Lanhers
- Unité de Recherche Animal et Fonctionnalités des Produits Animaux EA3998, Université de Lorraine, Vandœuvre-lès-Nancy, France
- Institut National de Recherche Agronomique USC 0340, Vandœuvre-lès-Nancy, France
| | - Samina Akbar
- Unité de Recherche Animal et Fonctionnalités des Produits Animaux EA3998, Université de Lorraine, Vandœuvre-lès-Nancy, France
- Institut National de Recherche Agronomique USC 0340, Vandœuvre-lès-Nancy, France
| | - Lynn Gregory-Pauron
- Unité de Recherche Animal et Fonctionnalités des Produits Animaux EA3998, Université de Lorraine, Vandœuvre-lès-Nancy, France
- Institut National de Recherche Agronomique USC 0340, Vandœuvre-lès-Nancy, France
| | - Thierry Oster
- Unité de Recherche Animal et Fonctionnalités des Produits Animaux EA3998, Université de Lorraine, Vandœuvre-lès-Nancy, France
- Institut National de Recherche Agronomique USC 0340, Vandœuvre-lès-Nancy, France
| | - Nathalie Grova
- Laboratory of Analytical Human Biomonitoring, Centre de Recherche Public de la Santé, Luxembourg, Luxembourg
| | - Brice Appenzeller
- Laboratory of Analytical Human Biomonitoring, Centre de Recherche Public de la Santé, Luxembourg, Luxembourg
| | - Jordane Jasniewski
- Laboratoire d'Ingenérie des Biomolécules, Université de Lorraine, Vandœuvre-lès-Nancy, France
| | - Cyril Feidt
- Unité de Recherche Animal et Fonctionnalités des Produits Animaux EA3998, Université de Lorraine, Vandœuvre-lès-Nancy, France
- Institut National de Recherche Agronomique USC 0340, Vandœuvre-lès-Nancy, France
| | - Catherine Corbier
- Unité de Recherche Animal et Fonctionnalités des Produits Animaux EA3998, Université de Lorraine, Vandœuvre-lès-Nancy, France
- Institut National de Recherche Agronomique USC 0340, Vandœuvre-lès-Nancy, France
| | - Frances T. Yen
- Unité de Recherche Animal et Fonctionnalités des Produits Animaux EA3998, Université de Lorraine, Vandœuvre-lès-Nancy, France
- Institut National de Recherche Agronomique USC 0340, Vandœuvre-lès-Nancy, France
- Institut National de la Santé et de la Recherche Médicale, Vandœuvre-lès-Nancy, France
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15
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Zidane F, Zeder-Lutz G, Altschuh D, Girardet JM, Miclo L, Corbier C, Cakir-Kiefer C. Surface plasmon resonance analysis of the binding mechanism of pharmacological and peptidic inhibitors to human somatic angiotensin I-converting enzyme. Biochemistry 2013; 52:8722-31. [PMID: 24168709 DOI: 10.1021/bi4006144] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Somatic angiotensin I-converting enzyme (ACE) possesses two catalytic domains and plays a major role in the regulation of blood pressure, thus representing a therapeutic target for the treatment of hypertension. We present a comprehensive surface plasmon resonance (SPR) study of the interaction of human somatic ACE with the pharmacological inhibitors captopril and lisinopril, the bradykinin potentiating peptide BPP-11b, and the food peptidic inhibitors from bovine αs2-casein, F(174)ALPQYLK(181) and F(174)ALPQY(179). SPR binding curves recorded with the high potency inhibitors captopril, lisinopril, and BPP-11b were evaluated both by regression analysis and by kinetic distribution analysis. The results indicated that captopril and lisinopril bound ACE with two K(D)'s differing by a factor 10-20 and >30, respectively (lowest K(D) = 0.1-0.3 nM for both inhibitors). This shows, for the first time in a direct binding assay with the two-domain enzyme, the existence of two binding modes of the pharmacological inhibitors, presumably with the two ACE domains. The BPP-11b-ACE binding curves were complex but showed a predominant interaction with K(D) in the nanomolar range. The caseinopeptides, known to inhibit ACE with an IC₅₀ of 4.3 μM, bound to ACE with K(D) = 3-4 μM. Mapping of the F(174)ALPQY(179) binding site on ACE by sequential binding studies using captopril or BPP-11b indicated that it bound to (or near) the two active sites of ACE, in agreement with the stoichiometry of 2 determined from data fitting. Our results provide a detailed characterization of ACE-inhibitor binding modes and validate SPR for predicting the inhibitory potential of new compounds.
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Affiliation(s)
- Faïza Zidane
- Université de Lorraine , Unité de Recherche Animal et Fonctionnalités des Produits Animaux (UR AFPA), Équipe Protéolyse et Biofonctionnalités des Protéines et des Peptides (PB2P), Faculté des Sciences et Technologies, Campus Aiguillettes, BP 70239, Vandœuvre-lès-Nancy F-54506, France
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16
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Yen FT, Layeghkhavidaki H, Lanhers M, Akbar S, Grova N, Appenzeller B, Feidt C, Corbier C. Significant weight gain in mice exposed to the pollutant benzo[a]pyrene is associated with modifications in hepatic lipoprotein receptors and lipid status. FASEB J 2013. [DOI: 10.1096/fasebj.27.1_supplement.lb118] [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: 11/11/2022]
Affiliation(s)
- Frances T Yen
- URAFPAUniversity of LorraineVandoeuvre‐les‐NancyFrance
| | | | | | - Samina Akbar
- URAFPAUniversity of LorraineVandoeuvre‐les‐NancyFrance
| | - Nathalie Grova
- Laboratory of Analytical Human BiomonitoringUniversity of LuxembourgLuxembourgLuxembourg
| | - Brice Appenzeller
- Laboratory of Analytical Human BiomonitoringUniversity of LuxembourgLuxembourgLuxembourg
| | - Cyril Feidt
- URAFPAUniversity of LorraineVandoeuvre‐les‐NancyFrance
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Ahmad N, Girardet JM, Akbar S, Lanhers MC, Paris C, Yen FT, Corbier C. Lactoferrin and its hydrolysate bind directly to the oleate-activated form of the lipolysis stimulated lipoprotein receptor. FEBS J 2012; 279:4361-73. [PMID: 23050782 DOI: 10.1111/febs.12026] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2012] [Revised: 09/14/2012] [Accepted: 10/02/2012] [Indexed: 11/29/2022]
Abstract
The hepatic removal of triglyceride-rich chylomicrons during the postprandial phase represents an important step towards determining the bioavailability of dietary lipids amongst the peripheral tissues. Indeed, elevated postprandial lipemia is often associated with obesity and increased risk of coronary heart disease. The milk protein, lactoferrin, has been shown to inhibit hepatic chylomicron remnant removal by the liver, resulting in increased postprandial lipemia. Despite numerous studies on potential targets for lactoferrin, the molecular mechanisms underlying the effect of lactoferrin remain unclear. We recently demonstrated that the lipolysis stimulated lipoprotein receptor (LSR) contributes to the removal of triglyceride-rich lipoproteins during the postprandial phase. Here, we report that while lactoferrin does not have any significant effect on LSR protein levels in mouse Hepa1-6 cells, this protein colocalizes with LSR in cells but only in the presence of oleate, which is needed to obtain LSR in its active form as lipoprotein receptor. Ligand blotting using purified LSR revealed that lactoferrin binds directly to the receptor in the presence of oleate and prevents the binding of triglyceride-rich lipoproteins. Both C- and N-lobes of lactoferrin as well as a mixture of peptides derived from its hydrolysis retained the ability to bind LSR in its active form. We propose then that the elevated postprandial lipemia observed upon lactoferrin treatment in vivo is mediated in part by its direct interaction with free fatty acid activated LSR, thus preventing clearance of chylomicrons and their remnants through the LSR pathway.
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Affiliation(s)
- Nazir Ahmad
- Université de Lorraine, Unité de Recherche Animal et Fonctionnalités des Produits Animaux, Vandœuvre-lès-Nancy Cedex, France
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18
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Castets MD, Schaerlinger B, Silvestre F, Gardeur JN, Dieu M, Corbier C, Kestemont P, Fontaine P. Combined analysis of Perca fluviatilis reproductive performance and oocyte proteomic profile. Theriogenology 2012; 78:432-42, 442.e1-13. [DOI: 10.1016/j.theriogenology.2012.02.023] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Revised: 02/17/2012] [Accepted: 02/19/2012] [Indexed: 12/16/2022]
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Zidane F, Matéos A, Cakir-Kiefer C, Miclo L, Rahuel-Clermont S, Girardet JM, Corbier C. Binding of divalent metal ions to 1–25 β-caseinophosphopeptide: An isothermal titration calorimetry study. Food Chem 2012; 132:391-8. [DOI: 10.1016/j.foodchem.2011.11.006] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2011] [Revised: 09/20/2011] [Accepted: 11/01/2011] [Indexed: 11/15/2022]
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20
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Matéos A, Girardet JM, Mollé D, Corbier C, Gaillard JL, Miclo L. Identification of phosphorylation sites of equine beta-casein isoforms. Rapid Commun Mass Spectrom 2010; 24:1533-1542. [PMID: 20486249 DOI: 10.1002/rcm.4552] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Equine beta-casein is phosphorylated at variable degrees and isoforms carrying 3 to 7 phosphate groups (3P-7P) have been found in milk, but the phosphorylated amino acid residues of each isoform are not yet identified. In the present work, the different phosphorylation variants were first isolated by ion-exchange chromatography and then hydrolysed by trypsin to generate caseinophosphopeptides (CPPs), each containing all the potential phosphorylation sites. The equine CPPs were prepared by metal oxide affinity chromatography, a method based on the affinity of phosphate groups towards titanium dioxide immobilized onto a micro-column. This method turned out to be an efficient tool to separate the CPPs Arg(1)-Lys(34) and Glu(4)-Lys(34) from non-phosphorylated peptides. Purification was achieved by reversed-phase high-performance liquid chromatography (RP-HPLC) and each CPP was hydrolyzed by endoproteinase Glu-C. Finally, the digests were analyzed by RP-HPLC/electrospray ionization mass spectrometry (RP-HPLC/ESI-MS) and identified by nano-electrospray ionization tandem mass spectrometry (nESI-MS/MS) to locate the phosphorylated sites of the beta-casein isoforms 4P-7P with accuracy. Thus, the isoform 4P was found to be phosphorylated on residues Ser(9), Ser(23), Ser(24), and Ser(25). Addition of phosphate groups on Ser(18), Thr(12), and Ser(10) led to the formation of the isoforms 5P-7P, respectively. The results indicated that the in vivo phosphorylation of the equine beta-casein follows a sequential way and is not randomly performed.
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Affiliation(s)
- Aurélie Matéos
- Unité de Recherche Animal et Fonctionnalités des Produits Animaux (UR AFPA) - Equipe Protéolyse et Biofonctionnalités des Protéines et des Peptides (PB2P), Nancy-Université, Vandoeuvre-lès-Nancy, France
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21
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Couturier J, Koh CS, Zaffagnini M, Winger AM, Gualberto JM, Corbier C, Decottignies P, Jacquot JP, Lemaire SD, Didierjean C, Rouhier N. Structure-function relationship of the chloroplastic glutaredoxin S12 with an atypical WCSYS active site. J Biol Chem 2009; 284:9299-310. [PMID: 19158074 PMCID: PMC2666582 DOI: 10.1074/jbc.m807998200] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2008] [Revised: 01/16/2009] [Indexed: 01/08/2023] Open
Abstract
Glutaredoxins (Grxs) are efficient catalysts for the reduction of mixed disulfides in glutathionylated proteins, using glutathione or thioredoxin reductases for their regeneration. Using GFP fusion, we have shown that poplar GrxS12, which possesses a monothiol (28)WCSYS(32) active site, is localized in chloroplasts. In the presence of reduced glutathione, the recombinant protein is able to reduce in vitro substrates, such as hydroxyethyldisulfide and dehydroascorbate, and to regenerate the glutathionylated glyceraldehyde-3-phosphate dehydrogenase. Although the protein possesses two conserved cysteines, it is functioning through a monothiol mechanism, the conserved C terminus cysteine (Cys(87)) being dispensable, since the C87S variant is fully active in all activity assays. Biochemical and crystallographic studies revealed that Cys(87) exhibits a certain reactivity, since its pK(a) is around 5.6. Coupled with thiol titration, fluorescence, and mass spectrometry analyses, the resolution of poplar GrxS12 x-ray crystal structure shows that the only oxidation state is a glutathionylated derivative of the active site cysteine (Cys(29)) and that the enzyme does not form inter- or intramolecular disulfides. Contrary to some plant Grxs, GrxS12 does not incorporate an iron-sulfur cluster in its wild-type form, but when the active site is mutated into YCSYS, it binds a [2Fe-2S] cluster, indicating that the single Trp residue prevents this incorporation.
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Affiliation(s)
- Jeremy Couturier
- Unité Mixte de Recherches 1136 UHP-INRA Interaction Arbres-Microorganismes, IFR 110 GEEF, Nancy Université, Faculté des Sciences, 54506 Vandoeuvre Cedex, France
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Rouhier N, Koh CS, Gelhaye E, Corbier C, Favier F, Didierjean C, Jacquot JP. Redox based anti-oxidant systems in plants: Biochemical and structural analyses. Biochim Biophys Acta Gen Subj 2008; 1780:1249-60. [DOI: 10.1016/j.bbagen.2007.12.007] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2007] [Revised: 12/11/2007] [Accepted: 12/17/2007] [Indexed: 12/18/2022]
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Korchowiec B, Corvis Y, Viitala T, Feidt C, Guiavarch Y, Corbier C, Rogalska E. Interfacial approach to polyaromatic hydrocarbon toxicity: phosphoglyceride and cholesterol monolayer response to phenantrene, anthracene, pyrene, chrysene, and benzo[a]pyrene. J Phys Chem B 2008; 112:13518-31. [PMID: 18834169 DOI: 10.1021/jp804080h] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Interactions of phenantrene, anthracene, pyrene, chrysene, and benzo[a]pyrene (polyaromatic hydrocarbons) with model phospholipid membranes were probed using the Langmuir technique. The lipid monolayers were prepared using 1,2-dipalmitoyl-sn-glycero-3-phosphocholine, 1,2-dipalmitoyl-sn-glycero-3-phosphoethanolamine, 1,2-dipalmitoyl-sn-glycero-3-phosphoglycerol, 1,2-dipalmitoyl-sn-glycero-3-phosphoserine, 1,2-myristoyl-sn-glycero-3-phosphoethanolamine, 1,2-dilauroyl-sn-glycero-3-phosphocholine, and cholesterol. Surface pressure and electrical surface potential were measured on mixed phospholipid/PAH monolayers spread on a pure water subphase. The morphology of the mixed monolayers was followed with Brewster angle microscopy. Polarization-modulation infrared reflection-absorption spectroscopy spectra obtained on DPPE/benzo[a]pyrene showed that the latter interacts with the carbonyl groups of the phospholipid. On the other hand, the activity of phospholipase A2 toward DLPC used as a probe to locate benzo[a]pyrene in the monolayers indicates that the polyaromatic hydrocarbons are not accessible to the enzyme. The results obtained show that all PAHs studied affect the properties of the pure lipid, albeit in different ways. The most notable effects, namely, film fluidization and morphology changes, were observed with benzo[a]pyrene. In contrast, the complexity of mixed lipid monolayers makes the effect of PAHs difficult to detect. It can be assumed that the differences observed between PAHs in monolayers correlate with their toxicity.
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Affiliation(s)
- Beata Korchowiec
- Department of Physical Chemistry and Electrochemistry, Faculty of Chemistry, Jagiellonian University, ul. Romana Ingardena 3, 30-060 Krakow, Poland
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24
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Koh CS, Navrot N, Didierjean C, Rouhier N, Hirasawa M, Knaff DB, Wingsle G, Samian R, Jacquot JP, Corbier C, Gelhaye E. An atypical catalytic mechanism involving three cysteines of thioredoxin. J Biol Chem 2008; 283:23062-72. [PMID: 18552403 DOI: 10.1074/jbc.m802093200] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Unlike other thioredoxins h characterized so far, a poplar thioredoxin of the h type, PtTrxh4, is reduced by glutathione and glutaredoxin (Grx) but not NADPH:thioredoxin reductase (NTR). PtTrxh4 contains three cysteines: one localized in an N-terminal extension (Cys(4)) and two (Cys(58) and Cys(61)) in the classical thioredoxin active site ((57)WCGPC(61)). The property of a mutant in which Cys(58) was replaced by serine demonstrates that it is responsible for the initial nucleophilic attack during the catalytic cycle. The observation that the C4S mutant is inactive in the presence of Grx but fully active when dithiothreitol is used as a reductant indicates that Cys(4) is required for the regeneration of PtTrxh4 by Grx. Biochemical and x-ray crystallographic studies indicate that two intramolecular disulfide bonds involving Cys(58) can be formed, linking it to either Cys(61) or Cys(4). We propose thus a four-step disulfide cascade mechanism involving the transient glutathionylation of Cys(4) to convert this atypical thioredoxin h back to its active reduced form.
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Affiliation(s)
- Cha San Koh
- Equipe Biocristallographie, UMR 7036 CNRS-Université Henri Poincaré, URAFPA, Equipe PB2P, Faculté des Sciences et Techniques, Nancy Université, BP 239, 54506 Vandoeuvre Cedex France
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25
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Moniot S, Bruno S, Vonrhein C, Didierjean C, Boschi-Muller S, Vas M, Bricogne G, Branlant G, Mozzarelli A, Corbier C. Trapping of the thioacylglyceraldehyde-3-phosphate dehydrogenase intermediate from Bacillus stearothermophilus. Direct evidence for a flip-flop mechanism. J Biol Chem 2008; 283:21693-702. [PMID: 18480053 DOI: 10.1074/jbc.m802286200] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The crystal structure of the thioacylenzyme intermediate of the phosphorylating glyceraldehyde-3-phosphate dehydrogenase (GAPDH) from Bacillus stearothermophilus has been solved at 1.8A resolution. Formation of the intermediate was obtained by diffusion of the natural substrate within the crystal of the holoenzyme in the absence of inorganic phosphate. To define the soaking conditions suitable for the isolation and accumulation of the intermediate, a microspectrophotometric characterization of the reaction of GAPDH in single crystals was carried out, following NADH formation at 340 nm. When compared with the structure of the Michaelis complex (Didierjean, C., Corbier, C., Fatih, M., Favier, F., Boschi-Muller, S., Branlant, G., and Aubry, A. (2003) J. Biol. Chem. 278, 12968-12976) the 206-210 loop is shifted and now forms part of the so-called "new P(i)" site. The locations of both the O1 atom and the C3-phosphate group of the substrate are also changed. Altogether, the results provide evidence for the flipping of the C3-phosphate group occurring concomitantly or after the redox step.
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Affiliation(s)
- Sébastien Moniot
- Laboratoire de Cristallographie et de Modélisation des Matériaux Minéraux et Biologiques, UMR CNRS-Université Henri Poincaré (UHP) 7036
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26
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D'Ambrosio K, Pailot A, Talfournier F, Didierjean C, Benedetti E, Aubry A, Branlant G, Corbier C. The First Crystal Structure of a Thioacylenzyme Intermediate in the ALDH Family: New Coenzyme Conformation and Relevance to Catalysis. Biochemistry 2007. [DOI: 10.1021/bi701283c] [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: 11/29/2022]
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Koh CS, Didierjean C, Navrot N, Panjikar S, Mulliert G, Rouhier N, Jacquot JP, Aubry A, Shawkataly O, Corbier C. Crystal Structures of a Poplar Thioredoxin Peroxidase that Exhibits the Structure of Glutathione Peroxidases: Insights into Redox-driven Conformational Changes. J Mol Biol 2007; 370:512-29. [PMID: 17531267 DOI: 10.1016/j.jmb.2007.04.031] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2007] [Revised: 04/06/2007] [Accepted: 04/09/2007] [Indexed: 01/29/2023]
Abstract
Glutathione peroxidases (GPXs) are a group of enzymes that regulate the levels of reactive oxygen species in cells and tissues, and protect them against oxidative damage. Contrary to most of their counterparts in animal cells, the higher plant GPX homologues identified so far possess cysteine instead of selenocysteine in their active site. Interestingly, the plant GPXs are not dependent on glutathione but rather on thioredoxin as their in vitro electron donor. We have determined the crystal structures of the reduced and oxidized form of Populus trichocarpaxdeltoides GPX5 (PtGPX5), using a selenomethionine derivative. PtGPX5 exhibits an overall structure similar to that of the known animal GPXs. PtGPX5 crystallized in the assumed physiological dimeric form, displaying a pseudo ten-stranded beta sheet core. Comparison of both redox structures indicates that a drastic conformational change is necessary to bring the two distant cysteine residues together to form an intramolecular disulfide bond. In addition, a computer model of a complex of PtGPX5 and its in vitro recycling partner thioredoxin h1 is proposed on the basis of the crystal packing of the oxidized form enzyme. A possible role of PtGPX5 as a heavy-metal sink is also discussed.
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Affiliation(s)
- Cha San Koh
- LCM3B, Equipe Biocristallographie, UMR 7036 CNRS-UHP, Faculté des Sciences et Techniques, Nancy Université, BP 239, 54506 Vandoeuvre-lès-Nancy, France
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Pailot A, D'Ambrosio K, Corbier C, Talfournier F, Branlant G. Invariant Thr244 is essential for the efficient acylation step of the non-phosphorylating glyceraldehyde-3-phosphate dehydrogenase from Streptococcus mutans. Biochem J 2006; 400:521-30. [PMID: 16958622 PMCID: PMC1698602 DOI: 10.1042/bj20060843] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [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: 11/17/2022]
Abstract
One of the most striking features of several X-ray structures of CoA-independent ALDHs (aldehyde dehydrogenases) in complex with NAD(P) is the conformational flexibility of the NMN moiety. However, the fact that the rate of the acylation step is high in GAPN (non-phosphorylating glyceraldehyde-3-phosphate dehydrogenase) from Streptococcus mutans implies an optimal positioning of the nicotinamide ring relative to the hemithioacetal intermediate within the ternary GAPN complex to allow an efficient and stereospecific hydride transfer. Substitutions of serine for invariant Thr244 and alanine for Lys178 result in a drastic decrease of the efficiency of hydride transfer which becomes rate-limiting. The crystal structure of the binary complex T244S GAPN-NADP shows that the absence of the beta-methyl group leads to a well-defined conformation of the NMN part, including the nicotinamide ring, clearly different from that depicted to be suitable for an efficient hydride transfer in the wild-type. The approximately 0.6-unit increase in pK(app) of the catalytic Cys302 observed in the ternary complex for both mutated GAPNs is likely to be due to a slight difference in positioning of the nicotinamide ring relative to Cys302 with respect to the wild-type ternary complex. Taken together, the data support a critical role of the Thr244 beta-methyl group, held in position through a hydrogen-bond interaction between the Thr244 beta-hydroxy group and the epsilon-amino group of Lys178, in permitting the nicotinamide ring to adopt a conformation suitable for an efficient hydride transfer during the acylation step for all the members of the CoA-independent ALDH family.
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Affiliation(s)
- Arnaud Pailot
- *MAEM, UMR 7567 Nancy-Université, CNRS, Faculté des Sciences, 54506 Vandoeuvre Cedex, France
| | - Katia D'Ambrosio
- †LCM3B, Groupe Biocristallographie, UMR 7036 Nancy-Université, CNRS, Faculté des Sciences, 54506 Vandoeuvre Cedex, France
- ‡Istituto di Biostrutture e Bioimmagini, CNR, 80134 Napoli, Italy
| | - Catherine Corbier
- †LCM3B, Groupe Biocristallographie, UMR 7036 Nancy-Université, CNRS, Faculté des Sciences, 54506 Vandoeuvre Cedex, France
| | - François Talfournier
- *MAEM, UMR 7567 Nancy-Université, CNRS, Faculté des Sciences, 54506 Vandoeuvre Cedex, France
- Correspondence may be addressed to either of these authors (email or )
| | - Guy Branlant
- *MAEM, UMR 7567 Nancy-Université, CNRS, Faculté des Sciences, 54506 Vandoeuvre Cedex, France
- Correspondence may be addressed to either of these authors (email or )
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29
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D'Ambrosio K, Pailot A, Talfournier F, Didierjean C, Benedetti E, Aubry A, Branlant G, Corbier C. The first crystal structure of a thioacylenzyme intermediate in the ALDH family: new coenzyme conformation and relevance to catalysis. Biochemistry 2006; 45:2978-86. [PMID: 16503652 DOI: 10.1021/bi0515117] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.1] [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: 11/30/2022]
Abstract
Crystal structures of several members of the nonphosphorylating CoA-independent aldehyde dehydrogenase (ALDH) family have shown that the peculiar binding mode of the cofactor to the Rossmann fold results in a conformational flexibility for the nicotinamide moiety of the cofactor. This has been hypothesized to constitute an essential feature of the catalytic mechanism because the conformation of the cofactor required for the acylation step is not appropriate for the deacylation step. In the present study, the structure of a reaction intermediate of the E268A-glyceraldehyde 3-phosphate dehydrogenase (GAPN) from Streptococcus mutans, obtained by soaking the crystals of the enzyme/NADP complex with the natural substrate, is reported. The substrate is bound covalently in the four monomers and presents the geometric characteristics expected for a thioacylenzyme intermediate. Control experiments assessed that reduction of the coenzyme has occurred within the crystal. The structure reveals that reduction of the cofactor upon acylation leads to an extensive motion of the nicotinamide moiety with a flip of the reduced pyridinium ring away from the active site without significant changes of the protein structure. This event positions the reduced nicotinamide moiety in a pocket that likely constitutes the exit door for NADPH. Arguments are provided that the structure reported here constitutes a reasonable picture of the first thioacylenzyme intermediate characterized thus far in the ALDH family and that the position of the reduced nicotinamide moiety observed in GAPN is the one suitable for the deacylation step within all of the nonphosphorylating CoA-independent ALDH family.
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Affiliation(s)
- Katia D'Ambrosio
- LCM3B, Groupe Biocristallographie, UMR 7036, CNRS-UHP, Faculté des Sciences, 54506 Vandoeuvre Cedex, France
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30
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Echalier A, Trivelli X, Corbier C, Rouhier N, Walker O, Tsan P, Jacquot JP, Aubry A, Krimm I, Lancelin JM. Crystal structure and solution NMR dynamics of a D (type II) peroxiredoxin glutaredoxin and thioredoxin dependent: a new insight into the peroxiredoxin oligomerism. Biochemistry 2005; 44:1755-67. [PMID: 15697201 DOI: 10.1021/bi048226s] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [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: 11/29/2022]
Abstract
Peroxiredoxins (Prxs) constitute a family of thiol peroxidases that reduce hydrogen peroxide, peroxinitrite, and hydroperoxides using a strictly conserved cysteine. Very abundant in all organisms, Prxs are produced as diverse isoforms characterized by different catalytic mechanisms and various thiol-containing reducing agents. The oligomeric state of Prxs and the link with their functionality is a subject of intensive research. We present here a combined X-ray and nuclear magnetic resonance (NMR) study of a plant Prx that belongs to the D-Prx (type II) subfamily. The Populus trichocarpa Prx is the first Prx shown to be regenerated in vitro by both the glutaredoxin and thioredoxin systems. The crystal structure and solution NMR provide evidence that the reduced protein is a specific noncovalent homodimer both in the crystal and in solution. The dimer interface is roughly perpendicular to the plane of the central beta sheet and differs from the interface of A- and B-Prx dimers, where proteins associate in the plane parallel to the beta sheet. The homodimer interface involves residues strongly conserved in the D (type II) Prxs, suggesting that all Prxs of this family can homodimerize. The study provides a new insight into the Prx oligomerism and the basis for protein-protein and enzyme-substrate interaction studies by NMR.
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Affiliation(s)
- Aude Echalier
- LCM3B, Groupe Biocristallographie, Université Henri Poincaré-Nancy1, UMR CNRS 7036, 54506 Vandoeuvre, France
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31
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Rossi F, Zanotti G, Saviano M, Iacovino R, Palladino P, Saviano G, Amodeo P, Tancredi T, Laccetti P, Corbier C, Benedetti E. New antitumour cyclic astin analogues: synthesis, conformation and bioactivity. J Pept Sci 2004; 10:92-102. [PMID: 14994987 DOI: 10.1002/psc.506] [Citation(s) in RCA: 13] [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: 11/11/2022]
Abstract
Astins, antitumour cyclic pentapeptides, were isolated from the Aster tataricus. Their chemical structures, consist of a 16-membered ring system containing a unique beta,gamma-dichlorinated proline [Pro(Cl)2], other non-coded amino acid residues and a cis conformation in one of the peptide bonds. The astin backbone conformation, along with the cis peptide bond in which the beta,gamma-dichlorinated proline residue is involved, was considered to play an important role in their antineoplastic activities on sarcoma 180A and P388 lymphocytic leukaemia in mice, but the scope and potential applications of this activity remain unclear. With the aim at improving our knowledge of the conformational properties influencing the bioactivity in this class of compounds, new astin-related cyclopeptides were synthesized differing from the natural products by the presence of some non-proteinogenic amino acid residues: Aib, Abu, -(S)beta3-hPhe and a peptide bond surrogate (-SO2-NH-). The analogues prepared c(-Pro-Thr-Aib-beta3-Phe-Abu-), c[Pro-Thr-Aib-(S)beta3-hPhe-Abu], c[Pro-Abu-Ser-(S)beta3-hPhe psi(CH2-SO2-NH)-Abu] and c[Pro-Thr-Aib-(S)beta3-hPhe psi(CH2-SO2-NH)-Abu] were synthesized by classical methods in solution and tested for their antitumour effect. These molecules were studied by crystal-state x-ray diffraction analysis and/or solution NMR and MD techniques.
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Affiliation(s)
- Filomena Rossi
- Dipartimento di Chimica Biologica, Università di Napoli Federico II, 80134 Napoli, Italy.
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32
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Rouhier N, Gelhaye E, Corbier C, Jacquot JP. Active site mutagenesis and phospholipid hydroperoxide reductase activity of poplar type II peroxiredoxin. Physiol Plant 2004; 120:57-62. [PMID: 15032877 DOI: 10.1111/j.0031-9317.2004.0203.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
The nature of the active site and the substrate specificity of poplar type II peroxiredoxin, an enzyme which preferentially uses glutaredoxin as an electron donor, were investigated in this study. The type II peroxiredoxin is able to use phospholipid hydroperoxide nearly as efficiently as hydrogen peroxide. Two of the hyper-conserved amino acid residues in peroxiredoxins have been altered, by site-directed mutagenesis, generating the mutants T48V and R129Q. The two mutant proteins are inactive with hydrogen peroxide or tertiary butyl hydroperoxide as substrates. On the other hand, the mutant enzymes catalyse the degradation of cumene hydroperoxide with low efficiency. This suggests that the thiol-dependent regeneration process of the catalytic cysteine is not affected by the mutations and that all substrates are not accommodated identically in the active site.
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Affiliation(s)
- Nicolas Rouhier
- UMR 1136 Interaction Arbres Microorganismes INRA-UHP. Université Henri Poincaré, Faculté des Sciences BP 239, 54506 Vandoeuvre Cedex France LCM3B, Groupe Biocristallographie, UMR 7036, UHP, Faculté des Sciences, 54506 Vandoeuvre Cedex, France
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33
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Formaggio F, Crisma M, Toniolo C, Broxterman QB, Kaptein B, Corbier C, Saviano M, Palladino P, Benedetti E. Cα-Methyl, Cα-n-Propylglycine Homo-oligomers. Macromolecules 2003. [DOI: 10.1021/ma030327v] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | | | - Catherine Corbier
- Laboratory of Crystallography, ESA 7036, Université Henry Poincaré−Nancy I, 54506 Vandoeuvre-lès-Nancy, France
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34
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D'Ambrosio K, Kauffmann B, Rouhier N, Benedetti E, Jacquot JP, Aubry A, Corbier C. Crystallization and preliminary X-ray studies of the glutaredoxin from poplar in complex with glutathione. Acta Crystallogr D Biol Crystallogr 2003; 59:1043-5. [PMID: 12777768 DOI: 10.1107/s0907444903006814] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2002] [Accepted: 03/24/2003] [Indexed: 03/02/2023]
Abstract
A monocysteinic mutant of poplar glutaredoxin (C30S) has been overproduced and purified. The protein has been crystallized in complex with glutathione using the hanging-drop vapour-diffusion technique in the presence of PEG 4000 as a precipitating agent. A native data set was collected at 1.55 A resolution. The crystals belong to space group P2(1)2(1)2(1), with unit-cell parameters a = 45.7, b = 49.1, c = 104.8 A. Isomorphous crystals of a selenomethionine derivative were grown under the same conditions. Three data sets were collected at 1.73 A using the FIP synchrotron beamline at the ESRF. The positions of the Se atoms were determined and model rebuilding and refinement are in progress.
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Affiliation(s)
- Katia D'Ambrosio
- LCM3B, Groupe Biocristallographie, UMR CNRS 7036, UHP-Nancy 1, Faculté des Sciences, BP 239, 54506 Vandoeuvre-lès-Nancy CEDEX, France
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35
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Vanderesse R, Thevenet L, Marraud M, Boggetto N, Reboud M, Corbier C. Alpha-aminoxy acids as building blocks for the oxime and hydroxylamine pseudopeptide links. Application to the synthesis of human elastase inhibitors. J Pept Sci 2003; 9:282-99. [PMID: 12803495 DOI: 10.1002/psc.452] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [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: 11/12/2022]
Abstract
The aminoxy acids NH2-O-C(alpha)HR-CO2H are much more easily obtained in the enantiomerically pure form than the analogous hydrazino acids NH2-NH-C(alpha)HR-CO2H, and it has been shown that the isosteric amidoxy psi[CO-NH-O] and hydrazide psi[CO-NH-NH] amide surrogates Induce two quite similar gamma-like folded structures. An aminoxy acid can also be N-coupled to a peptide aldehyde to give the aldoxime psi[CH = N-O] link or to a peptide ketone to form the ketoxime psi[CR= N-O] link. The former can be further reduced into the hydroxylamine psi[CH2-NH-O] link which gives rise to reduced amidoxy peptides. The structural properties Induced by these amide surrogates were studied, using IR and NMR spectroscopy, paying particular attention to the Z/E-isomerism of the oxime link. In order to investigate their inhibitory potency, the three amide surrogates were introduced in the Pro3-Val4 and Val4-Ala5 position of Z-Ala1-Ala2-Pro3-Val4-Ala5-Ala6-NHiPr, a substrate which is cleaved in the Val4-Ala5 position by human leukocyte elastase (HLE). The [Val4psi[CO-NH-O]Ala5] analogue was still a substrate, while the [Pro3psi[CO-NH-O]Val4] and [Val4psi[CH = N-O]Ala5] pseudopeptides acted as HLE competitive inhibitors.
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Affiliation(s)
- Regis Vanderesse
- LCPM, UMR CNRS-INPL 7568, ENSIC-INPL BP 451, 54001 Nancy, France.
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36
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Didierjean C, Corbier C, Fatih M, Favier F, Boschi-Muller S, Branlant G, Aubry A. Crystal structure of two ternary complexes of phosphorylating glyceraldehyde-3-phosphate dehydrogenase from Bacillus stearothermophilus with NAD and D-glyceraldehyde 3-phosphate. J Biol Chem 2003; 278:12968-76. [PMID: 12569100 DOI: 10.1074/jbc.m211040200] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.4] [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: 11/06/2022] Open
Abstract
The crystal structure of the phosphorylating glyceraldehyde-3-phosphate dehydrogenase (GAPDH) from Bacillus stearothermophilus was solved in complex with its cofactor, NAD, and its physiological substrate, D-glyceraldehyde 3-phosphate (D-G3P). To isolate a stable ternary complex, the nucleophilic residue of the active site, Cys(149), was substituted with alanine or serine. The C149A and C149S GAPDH ternary complexes were obtained by soaking the crystals of the corresponding binary complexes (enzyme.NAD) in a solution containing G3P. The structures of the two binary and the two ternary complexes are presented. The D-G3P adopts the same conformation in the two ternary complexes. It is bound in a non-covalent way, in the free aldehyde form, its C-3 phosphate group being positioned in the P(s) site and not in the P(i) site. Its C-1 carbonyl oxygen points toward the essential His(176), which supports the role proposed for this residue along the two steps of the catalytic pathway. Arguments are provided that the structures reported here are representative of a productive enzyme.NAD.D-G3P complex in the ground state (Michaelis complex).
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Affiliation(s)
- Claude Didierjean
- Laboratoire de Cristallographie et de Modélisation des Matériaux Minéraux et Biologiques, Groupe Biocristallographie, UMR 7036, CNRS-Université Henri Poincaré, Faculté des Sciences, 54506 Vandoeuvre Cedex, France
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37
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Jacquot JP, Gelhaye E, Rouhier N, Corbier C, Didierjean C, Aubry A. Thioredoxins and related proteins in photosynthetic organisms: molecular basis for thiol dependent regulation. Biochem Pharmacol 2002; 64:1065-9. [PMID: 12213606 DOI: 10.1016/s0006-2952(02)01177-2] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.2] [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: 10/27/2022]
Abstract
Thioredoxins are small molecular weight disulfide oxidoreductases specialized in the reduction of disulfide bonds on other proteins. Generally, the enzymes which are selectively and reversibly reduced by these proteins oscillate between an oxidized and inactive conformation and a reduced and active conformation. Thioredoxin constitutes the archetype of a family of protein disulfide oxidoreductases which comprises glutaredoxin and protein disulfide isomerase. Thioredoxin and glutaredoxin serve many roles in the cell, including the redox regulation of target enzymes and transcription factors. They can also serve as hydrogen donors to peroxiredoxins, recently discovered heme free peroxidases, the function of which is to get rid of hydroperoxides in the cell. This review describes the molecular basis for the functioning and interaction between these enzymes in photosynthetic organisms.
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Affiliation(s)
- Jean-Pierre Jacquot
- UMR INRA UHP Interaction Arbres Microorganismes, Université Henri Poincaré, Vandoeuvre, France.
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38
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Echalier A, Corbier C, Rouhier N, Jacquot JP, Aubry A. Crystallization and preliminary X-ray data of a bifunctional peroxiredoxin from poplar. Acta Crystallogr D Biol Crystallogr 2002; 58:1501-3. [PMID: 12198315 DOI: 10.1107/s0907444902011782] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2002] [Accepted: 07/03/2002] [Indexed: 11/10/2022]
Abstract
Two variants (wild type and V152C mutant) of a bifunctional poplar peroxiredoxin have been overexpressed in Escherichia coli cells. The two recombinant enzymes were purified and crystallized using the hanging-drop vapour-diffusion technique. Data sets were collected to 1.62 and 2.48 A resolution using X-ray synchrotron-source radiation from two crystal forms of wild-type peroxiredoxin which belonged to the monoclinic space group P2(1) (with unit-cell parameters a = 59.26, b = 68.80, c = 75.71 A, beta = 93.45 degrees ) and to the orthorhombic space group P2(1)2(1)2 (with unit-cell parameters a = 64.70, b = 130.73, c = 35.59 A), respectively. Data were also collected to 2.17 A resolution using a home X-ray source from a V152C peroxiredoxin crystal which belongs to the triclinic space group (P1), with unit-cell parameters a = 36.65, b = 41.53, c = 58.06 A, alpha = 70.52, beta = 93.45, gamma = 64.31 degrees. Phases have been obtained using molecular replacement with the structure of human peroxiredoxin V (PDB code 1hd2) as a search model. Refinement of the structures is in progress.
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Affiliation(s)
- Aude Echalier
- LCM3B, Groupe Biocristallographie, UMR 7036, UHP, Faculté des Sciences, 54506 Vandoeuvre CEDEX, France
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Mandelman D, Gonzalo P, Lavergne JP, Corbier C, Reboud JP, Haser R. Crystallization and preliminary X-ray study of an N-terminal fragment of rat liver ribosomal P2 protein. Acta Crystallogr D Biol Crystallogr 2002; 58:668-71. [PMID: 11914492 DOI: 10.1107/s0907444902002007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2001] [Accepted: 01/30/2002] [Indexed: 11/10/2022]
Abstract
Ribosomal P proteins have been shown to be involved in the binding of elongation factors and participate in factor-dependent GTP hydrolysis. The P proteins form the pentamer (P1/P2)(2)-P0 constituting the lateral flexible stalk of the 60S ribosomal subunit. The highly soluble domain (1-65) of rat liver P2 has been overexpressed in Escherichia coli as an N-terminal poly-His-tagged protein and crystallized. To reduce nucleation and improve crystal morphology and diffraction power, the crystals were grown in a gel matrix and an oil barrier was added between the reservoir and the drop to reduce the rate of vapour diffusion. This dramatically reduced the nucleation in the drops and yielded diffraction-quality crystals. Data were collected to 2.4 A resolution at beamline ID 14-1, ESRF. The crystals belong to the orthorhombic space group P2(1)2(1)2, with unit-cell parameters a = 37.7, b = 96.7, c = 135.0 A.
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Affiliation(s)
- David Mandelman
- Laboratoire de Bio-Cristallographie, Institut de Biologie et Chimie des Protéines, CNRS et Université Claude Bernard Lyon I-UMR 5086, 69367 Lyon CEDEX 07, France
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40
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Menchise V, Corbier C, Didierjean C, Jacquot JP, Benedetti E, Saviano M, Aubry A. Crystal structure of the W35A mutant thioredoxin h from Chlamydomonas reinhardtii: the substitution of the conserved active site Trp leads to modifications in the environment of the two catalytic cysteines. Biopolymers 2002; 56:1-7. [PMID: 11582571 DOI: 10.1002/1097-0282(2000)56:1<1::aid-bip1036>3.0.co;2-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [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: 11/08/2022]
Abstract
The conformational analysis of W35A thioredoxin h from the eukaryotic green alga Chlamydomonas reinhardtii in the solid state has been carried out by x-ray diffraction, with the aim to clarify the role of Trp in the catalysis. Comparative analysis of W35A mutant with wild-type (WT) thioredoxin shows that, even if the structural motif of thioredoxin is not perturbed, the substitution of Trp35 by an Ala leads to significant changes in protein conformation near the active site. This rearrangement increases its solvent exposure and explains the change of the pKa values of the catalytic cysteines. The substitution of the Trp residue also influences the crystal packing as well as the recognition ability of thioredoxin. The solid state analysis suggests that the Trp residue has a structural function both to force the active site in the bioactive conformation, and to mediate the protein-protein recognition.
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Affiliation(s)
- V Menchise
- LCM3B, groupe Biocristallographie, ESA CNRS 7036, Université Henri Poincaré, Nancy 1, Faculté des Sciences, BP 239, 54506 Vandoeuvre-lès-Nancy Cedex, France
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41
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Menchise V, Corbier C, Didierjean C, Saviano M, Benedetti E, Jacquot JP, Aubry A. Crystal structure of the wild-type and D30A mutant thioredoxin h of Chlamydomonas reinhardtii and implications for the catalytic mechanism. Biochem J 2001; 359:65-75. [PMID: 11563970 PMCID: PMC1222122 DOI: 10.1042/0264-6021:3590065] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Thioredoxins are ubiquitous proteins which catalyse the reduction of disulphide bridges on target proteins. The catalytic mechanism proceeds via a mixed disulphide intermediate whose breakdown should be enhanced by the involvement of a conserved buried residue, Asp-30, as a base catalyst towards residue Cys-39. We report here the crystal structure of wild-type and D30A mutant thioredoxin h from Chlamydomonas reinhardtii, which constitutes the first crystal structure of a cytosolic thioredoxin isolated from a eukaryotic plant organism. The role of residue Asp-30 in catalysis has been revisited since the distance between the carboxylate OD1 of Asp-30 and the sulphur SG of Cys-39 is too great to support the hypothesis of direct proton transfer. A careful analysis of all available crystal structures reveals that the relative positioning of residues Asp-30 and Cys-39 as well as hydrophobic contacts in the vicinity of residue Asp-30 do not allow a conformational change sufficient to bring the two residues close enough for a direct proton transfer. This suggests that protonation/deprotonation of Cys-39 should be mediated by a water molecule. Molecular-dynamics simulations, carried out either in vacuo or in water, as well as proton-inventory experiments, support this hypothesis. The results are discussed with respect to biochemical and structural data.
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Affiliation(s)
- V Menchise
- Laboratoire de Cristallographie et Modélisation des Matériaux Minéraux et Biologiques, Groupe Biocristallographie, ESA 7036, Université Henri Poincaré-Nancy I, BP 239, 54506 Vandoeuvre-lès-Nancy Cedex, France
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Corbier C, Krier F, Mulliert G, Vitoux B, Revol-Junelles AM. Biological activities and structural properties of the atypical bacteriocins mesenterocin 52b and leucocin b-ta33a. Appl Environ Microbiol 2001; 67:1418-22. [PMID: 11282585 PMCID: PMC92749 DOI: 10.1128/aem.67.4.1418-1422.2001] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [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 antibacterial spectra and modes of action of synthetic peptides corresponding to mesenterocin 52B and leucocin B-TA33a greatly differ despite their high sequence homology. Circular dichroism experiments establish the capacity of each of these two peptides to partly fold into an amphiphilic helix that might be crucial for their adsorption at lipophilic-hydrophilic interfaces.
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Affiliation(s)
- C Corbier
- Laboratoire de Cristallographie et Modélisation des Matériaux Minéraux et Biologiques, Groupe Biocristallographie, UPRESA CNRS 7036, Université Henri Poincaré-Nancy I, 54506 Vandoeuvre-lès-Nancy cedex, France
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Menchise V, Corbier C, Didierjean C, Saviano M, Benedetti E, Jacquot JP, Aubry A. Crystal structures of Wild-Type and D30A thioredoxin hfrom Chlamydomonas reinhardtiienlighten the role of water molecule in catalysis. Acta Crystallogr A 2000. [DOI: 10.1107/s0108767300025575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Fatih M, Didierjean C, Corbier C, Boschi-Muller S, Branlant G, Aubry A. The X-ray structure of the ternary complex GAPDH/NAD/G3P enlightens the role of two anion binding sites during the catalysis. Acta Crystallogr A 2000. [DOI: 10.1107/s0108767300025599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Boschi-Muller S, Azza S, Pollastro D, Corbier C, Branlant G. Comparative enzymatic properties of GapB-encoded erythrose-4-phosphate dehydrogenase of Escherichia coli and phosphorylating glyceraldehyde-3-phosphate dehydrogenase. J Biol Chem 1997; 272:15106-12. [PMID: 9182530 DOI: 10.1074/jbc.272.24.15106] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.3] [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: 02/04/2023] Open
Abstract
GapB-encoded protein of Escherichia coli and glyceraldehyde-3-phosphate dehydrogenase (GAPDH) share more than 40% amino acid identity. Most of the amino acids involved in the binding of cofactor and substrates to GAPDH are conserved in GapB-encoded protein. This enzyme shows an efficient non-phosphorylating erythrose-4-phosphate dehydrogenase activity (Zhao, G., Pease, A. J., Bharani, N., and Winkler, M. E. (1995) J. Bacteriol. 177, 2804-2812) but a low phosphorylating glyceraldehyde-3-phosphate dehydrogenase activity, whereas GAPDH shows a high efficient phosphorylating glyceraldehyde-3-phosphate dehydrogenase activity and a low phosphorylating erythrose-4-phosphate dehydrogenase activity. To identify the structural factors responsible for these differences, comparative kinetic and binding studies have been carried out on both GapB-encoded protein of Escherichia coli and GAPDH of Bacillus stearothermophilus. The KD constant of GapB-encoded protein for NAD is 800-fold higher than that of GAPDH. The chemical mechanism of erythrose 4-phosphate oxidation by GapB-encoded protein is shown to proceed through a two-step mechanism involving covalent intermediates with Cys-149, with rates associated to the acylation and deacylation processes of 280 s-1 and 20 s-1, respectively. No isotopic solvent effect is observed suggesting that the rate-limiting step is not hydrolysis. The rate of oxidation of glyceraldehyde 3-phosphate is 0.12 s-1 and is hydride transfer limiting, at least 2000-fold less efficient compared with that of erythrose 4-phosphate. Thus, it can be concluded that it is only the structure of the substrates that prevails in forming a ternary complex enzyme-NAD-thiohemiacetal productive (or not) for hydride transfer in the acylation step. This conclusion is reinforced by the fact that the rate of oxidation for erythrose 4-phosphate by GAPDH is 0.1 s-1 and is limited by the acylation step, whereas glyceraldehyde 3-phosphate acylation is efficient and is not rate-determining (>/=800 s-1). Substituting Asn for His-176 on GapB-encoded protein, a residue postulated to facilitate hydride transfer as a base catalyst, decreases 40-fold the kcat of glyceraldehyde 3-phosphate oxidation. This suggests that the non-efficient positioning of the C-1 atom of glyceraldehyde 3-phosphate relative to the pyridinium of the cofactor within the ternary complex is responsible for the low catalytic efficiency. No phosphorylating activity on erythrose 4-phosphate with GapB-encoded protein is observed although the Pi site is operative as proven by the oxidative phosphorylation of glyceraldehyde 3-phosphate. Thus the binding of inorganic phosphate to the Pi site likely is not productive for attacking efficiently the thioacyl intermediate formed with erythrose 4-phosphate, whereas a water molecule is an efficient nucleophile for the hydrolysis of the thioacyl intermediate. Compared with glyceraldehyde-3-phosphate dehydrogenase activity, this corresponds to an activation of the deacylation step by >/=4.5 kcal.mol-1. Altogether these results suggest subtle structural differences between the active sites of GAPDH and GapB-encoded protein that could be revealed and/or modulated by the structure of the substrate bound. This also indicates that a protein engineering approach could be used to convert a phosphorylating aldehyde dehydrogenase into an efficient non-phosphorylating one and vice versa.
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Affiliation(s)
- S Boschi-Muller
- Laboratoire d'Enzymologie et de Génie Génétique, Université de Nancy I, URA CNRS 457, B.P. 239, 54506 Vandoeuvre-les-Nancy Cédex, France
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Duée E, Olivier-Deyris L, Fanchon E, Corbier C, Branlant G, Dideberg O. Comparison of the structures of wild-type and a N313T mutant of Escherichia coli glyceraldehyde 3-phosphate dehydrogenases: implication for NAD binding and cooperativity. J Mol Biol 1996; 257:814-38. [PMID: 8636984 DOI: 10.1006/jmbi.1996.0204] [Citation(s) in RCA: 75] [Impact Index Per Article: 2.7] [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: 02/01/2023]
Abstract
The crystal structure of wild-type and N313T mutant glyceraldehyde 3-phosphate dehydrogenases from Escherichia coli was determined in the presence of NAD at 1.8 angstrom and 2.17 angstrom, respectively. The structure of the monomer and of the tetramer are similar to those observed for other GAPDHs. An exhaustive analysis of the hydrophobic clusters and the hydrogen bond networks explain the high degree of sequence conservation in GAPDHs. The structural effect of the N313T mutation is a change in the (phi,psi) angles of nearby residues Asn236 and Val237, while the structure around the mutated residue remains unchanged. A detailed comparison of the wild-type and N313T mutant E. coli GAPDH with the apo and holo forms of Bacillus stearothermophilus GAPDH is carried out in relation to the apo --> holo transition. An unbiased set of about 60 residues, whose C(alpha) atoms remain in the same relative position in the different forms of the tetramer, is defined as the tetramer "core" which acts as a fixed scaffold around which structural rearrangements occur during the apo --> holo transition. This core essentially includes beta-strands from the beta-sheets forming the O-P and Q-R interfaces, in particular strand beta1 which bears catalytic residue His176. During the apo --> holo transition, dimer O-P rotates around the molecular P-axis by about +1 degrees, and dimer O-R by about -1 degrees. Further rotations of the NAD binding domain relative to the catalytic domain are discussed in relation to the molecular symmetry. The possible effect on NAD binding cooperativity of mutations around the tetramer core is exemplified by residue 252. The presence of a conserved hydrophilic patch embedded in the hydrophobic O-P interface is highlighted. A mechanism for substrate binding, different from those currently proposed, is described where the hydroxyl group of the substrate C(2) atom is hydrogen bonded to Cys149N.
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Affiliation(s)
- E Duée
- Laboratoire de Cristallographie Macromoléculaire, Institut de Biologie Structurale Jean-Pierre EBEL, Grenoble, France
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Vignais ML, Corbier C, Mulliert G, Branlant C, Branlant G. Circular permutation within the coenzyme binding domain of the tetrameric glyceraldehyde-3-phosphate dehydrogenase from Bacillus stearothermophilus. Protein Sci 1995; 4:994-1000. [PMID: 7663355 PMCID: PMC2143130 DOI: 10.1002/pro.5560040519] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [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: 01/26/2023]
Abstract
A circularly permuted (cp) variant of the phosphorylating NAD-dependent glyceraldehyde-3-phosphate dehydrogenase (GAPDH) from Bacillus stearothermophilus has been constructed with N- and C-termini created within the coenzyme binding domain. The cp variant has a kcat value equal to 40% of the wild-type value, whereas Km and KD values for NAD show a threefold decrease compared to wild type. These results indicate that the folding process and the conformational changes that accompany NAD binding during the catalytic event occur efficiently in the permuted variant and that NAD binding is tighter. Reversible denaturation experiments show that the stability of the variant is only reduced by 0.7 kcal/mol compared to the wild-type enzyme. These experiments confirm and extend results obtained recently on other permuted proteins. For multimeric proteins, such as GAPDH, which harbor subunits with two structural domains, the natural location of the N- and C-termini is not a prerequisite for optimal folding and biological activity.
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Affiliation(s)
- M L Vignais
- Laboratoire d'Enzymologie et de Génie Génétique, URA CNRS 457, Vandoeuvre-lès-Nancy, France
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Olivier L, Buisson G, Fanchon E, Corbier C, Branlant G, Dideberg O. Crystallization and preliminary X-ray diffraction studies of Escherichia coli glyceraldehyde-3-phosphate dehydrogenase. Acta Crystallogr D Biol Crystallogr 1995; 51:245-7. [PMID: 15299328 DOI: 10.1107/s090744499401173x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Phosphorylating glyceraldehyde-3-phosphate dehydrogenase (GAPDH) is a key enzyme in glycolysis. Single crystals of NAD-dependent GAPDH from Escherichia coli have been obtained by vapour diffusion at room temperature using trisodium citrate as precipitant. In almost the same crystallization conditions, two kinds of crystals were found to be suitable for X-ray diffraction. The crystals with only one half of a tetramer in the asymmetric unit were chosen for high- resolution analysis. They belonged to space group C222(1), with cell dimensions a = 79.1, b = 189.6 and c = 122.2 A. These crystals diffracted to 1.8 A resolution.
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Affiliation(s)
- L Olivier
- Laboratoire de Cristallographie Macromoléculaire, Institut de Biologie Structurale, Grenoble, France
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Eyschen J, Corbier C, Vitoux B, Branlant G, Thong Cung M. TR-NOE NMR STUDY OF THE E. COLI WILD-TYPE GAPDH AND ITS THR313 MUTANT I NAD+ COMPLEX. Protein Pept Lett 1994. [DOI: 10.2174/0929866501666220421001443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
10 and 20 TR-NOE and molecular dynamics simulations were used to determine the conformation of NAD+
bound to the E. coliwild-type GAPDH or to its Asn313Thr mutant. The results were consistent with syn and
anti conformations of the nicotinamide-ribose and adenine-ribose bonds, respectively, in agreement with
crystallographic data. Different koff dissociation rate constants were observed for these two complexes.
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Affiliation(s)
- Jacqueline Eyschen
- L.E.G.G., URA CNRS 457, Universite Nancy I, BP 239, 54506 Vandoeuvre ls Nancy, France
| | - Catherine Corbier
- L.E.G.G., URA CNRS 457, Universite Nancy I, BP 239, 54506 Vandoeuvre ls Nancy, France
| | - Bernard Vitoux
- L.E.G.G., URA CNRS 457, Universite Nancy I, BP 239, 54506 Vandoeuvre ls Nancy, France
| | - Guy Branlant
- L.E.G.G., URA CNRS 457, Universite Nancy I, BP 239, 54506 Vandoeuvre ls Nancy, France
| | - Manh Thong Cung
- L.C.P.M., URA CNRS 494, ENSIC-INPL, BP 451, 1 rue Grandville, 54001 Nancy, France
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Corbier C, Michels S, Wonacott AJ, Branlant G. Characterization of the two anion-recognition sites of glyceraldehyde-3-phosphate dehydrogenase from Bacillus stearothermophilus by site-directed mutagenesis and chemical modification. Biochemistry 1994; 33:3260-5. [PMID: 8136361 DOI: 10.1021/bi00177a017] [Citation(s) in RCA: 21] [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: 01/29/2023]
Abstract
The active site of the glycolytic glyceraldehyde-3-phosphate dehydrogenase (GAPDH) contains two anion recognition sites which have been attributed to the phosphate binding of the substrates, namely, glyceraldehyde 3-phosphate (Ps site) and inorganic phosphate (Pi site) [Moras et al. (1975) J. Biol. Chem. 250, 9137-9162]. In order to probe the role of both sites during the catalytic event, Arg 195 from the Pi site and Arg 231 from the Ps site of the Bacillus stearothermophilus enzyme have been changed to Leu and Gly, respectively, by site-directed mutagenesis. A comparative study of the chemical reactivity of the mutants and wild type toward 2,3-butanedione revealed a similarly high reactivity only for the R195L mutant and wild type, suggesting that only Arg 231 is chemically reactive toward 2,3-butanedione and that its reactivity is not influenced by the presence of the residue Arg 195, which is only 4 A distant. The kinetic consequences of the mutations were also analyzed for the consecutive steps in the forward catalytic reaction. The replacement of Arg 195 by Leu leads to a marked decrease of the rate of the first steps of the reaction which lead to the acylenzyme formation, in particular, the rate of enzyme-substrate association, while these steps occur at a similar or higher rate when Arg 231 is replaced by Gly. Furthermore, the mutations R195L and R231G also result in a 550-fold and 16,400-fold decrease in the second-order rate constant of phosphorolysis. This step becomes rate-determining for the R195L mutant.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- C Corbier
- Laboratoire d'Enzymologie et de Génie Génétique, Université de Nancy I, URA CNRS 457, Vandoeuvre-les-Nancy, France
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