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  1. Article ; Online: Probing the E1o-E2o and E1a-E2o Interactions in Binary Subcomplexes of the Human 2-Oxoglutarate Dehydrogenase and 2-Oxoadipate Dehydrogenase Complexes by Chemical Cross-Linking Mass Spectrometry and Molecular Dynamics Simulation.

    Ozohanics, Oliver / Zhang, Xu / Nemeria, Natalia S / Ambrus, Attila / Jordan, Frank

    International journal of molecular sciences

    2023  Volume 24, Issue 5

    Abstract: The human 2-oxoglutarate dehydrogenase complex (hOGDHc) is a key enzyme in the tricarboxylic acid cycle and is one of the main regulators of mitochondrial metabolism through NADH and reactive oxygen species levels. Evidence was obtained for formation of ... ...

    Abstract The human 2-oxoglutarate dehydrogenase complex (hOGDHc) is a key enzyme in the tricarboxylic acid cycle and is one of the main regulators of mitochondrial metabolism through NADH and reactive oxygen species levels. Evidence was obtained for formation of a hybrid complex between the hOGDHc and its homologue the 2-oxoadipate dehydrogenase complex (hOADHc) in the L-lysine metabolic pathway, suggesting a crosstalk between the two distinct pathways. Findings raised fundamental questions about the assembly of hE1a (2-oxoadipate-dependent E1 component) and hE1o (2-oxoglutarate-dependent E1) to the common hE2o core component. Here we report chemical cross-linking mass spectrometry (CL-MS) and molecular dynamics (MD) simulation analyses to understand assembly in binary subcomplexes. The CL-MS studies revealed the most prominent
    MeSH term(s) Humans ; Ketoglutarate Dehydrogenase Complex/metabolism ; Molecular Dynamics Simulation ; Reactive Oxygen Species/metabolism ; Citric Acid Cycle ; Mass Spectrometry
    Chemical Substances Ketoglutarate Dehydrogenase Complex (EC 1.2.4.2) ; Reactive Oxygen Species
    Language English
    Publishing date 2023-02-25
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2019364-6
    ISSN 1422-0067 ; 1422-0067 ; 1661-6596
    ISSN (online) 1422-0067
    ISSN 1422-0067 ; 1661-6596
    DOI 10.3390/ijms24054555
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  2. Article ; Online: Probing the E1o-E2o and E1a-E2o Interactions in Binary Subcomplexes of the Human 2-Oxoglutarate Dehydrogenase and 2-Oxoadipate Dehydrogenase Complexes by Chemical Cross-Linking Mass Spectrometry and Molecular Dynamics Simulation

    Oliver Ozohanics / Xu Zhang / Natalia S. Nemeria / Attila Ambrus / Frank Jordan

    International Journal of Molecular Sciences, Vol 24, Iss 4555, p

    2023  Volume 4555

    Abstract: The human 2-oxoglutarate dehydrogenase complex (hOGDHc) is a key enzyme in the tricarboxylic acid cycle and is one of the main regulators of mitochondrial metabolism through NADH and reactive oxygen species levels. Evidence was obtained for formation of ... ...

    Abstract The human 2-oxoglutarate dehydrogenase complex (hOGDHc) is a key enzyme in the tricarboxylic acid cycle and is one of the main regulators of mitochondrial metabolism through NADH and reactive oxygen species levels. Evidence was obtained for formation of a hybrid complex between the hOGDHc and its homologue the 2-oxoadipate dehydrogenase complex (hOADHc) in the L-lysine metabolic pathway, suggesting a crosstalk between the two distinct pathways. Findings raised fundamental questions about the assembly of hE1a (2-oxoadipate-dependent E1 component) and hE1o (2-oxoglutarate-dependent E1) to the common hE2o core component. Here we report chemical cross-linking mass spectrometry (CL-MS) and molecular dynamics (MD) simulation analyses to understand assembly in binary subcomplexes. The CL-MS studies revealed the most prominent loci for hE1o-hE2o and hE1a-hE2o interactions and suggested different binding modes. The MD simulation studies led to the following conclusions: (i) The N-terminal regions in E1s are shielded by, but do not interact directly with hE2o. (ii) The hE2o linker region exhibits the highest number of H-bonds with the N-terminus and α/β1 helix of hE1o, yet with the interdomain linker and α/β1 helix of hE1a. (iii) The C-termini are involved in dynamic interactions in complexes, suggesting the presence of at least two conformations in solution.
    Keywords 2-oxoglutarate dehydrogenase ; 2-oxoadipate dehydrogenase ; dihydrolipoyl succinyltransferase ; protein–protein interactions ; chemical cross-linking mass spectrometry ; molecular dynamics simulations ; Biology (General) ; QH301-705.5 ; Chemistry ; QD1-999
    Subject code 540
    Language English
    Publishing date 2023-02-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Functional Versatility of the Human 2-Oxoadipate Dehydrogenase in the L-Lysine Degradation Pathway toward Its Non-Cognate Substrate 2-Oxopimelic Acid.

    Nemeria, Natalia S / Nagy, Balint / Sanchez, Roberto / Zhang, Xu / Leandro, João / Ambrus, Attila / Houten, Sander M / Jordan, Frank

    International journal of molecular sciences

    2022  Volume 23, Issue 15

    Abstract: The human 2-oxoadipate dehydrogenase complex (OADHc) in L-lysine catabolism is involved in the oxidative decarboxylation of 2-oxoadipate (OA) to glutaryl-CoA and NADH (+ ... ...

    Abstract The human 2-oxoadipate dehydrogenase complex (OADHc) in L-lysine catabolism is involved in the oxidative decarboxylation of 2-oxoadipate (OA) to glutaryl-CoA and NADH (+H
    MeSH term(s) Amino Acid Metabolism, Inborn Errors/metabolism ; Humans ; Ketoglutarate Dehydrogenase Complex/metabolism ; Lysine/metabolism ; NAD/metabolism ; Oxidation-Reduction
    Chemical Substances NAD (0U46U6E8UK) ; DHTKD1 protein, human (EC 1.2.4.2) ; Ketoglutarate Dehydrogenase Complex (EC 1.2.4.2) ; Lysine (K3Z4F929H6)
    Language English
    Publishing date 2022-07-26
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2019364-6
    ISSN 1422-0067 ; 1422-0067 ; 1661-6596
    ISSN (online) 1422-0067
    ISSN 1422-0067 ; 1661-6596
    DOI 10.3390/ijms23158213
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  4. Article: Toward an Understanding of the Structural and Mechanistic Aspects of Protein-Protein Interactions in 2-Oxoacid Dehydrogenase Complexes.

    Nemeria, Natalia S / Zhang, Xu / Leandro, Joao / Zhou, Jieyu / Yang, Luying / Houten, Sander M / Jordan, Frank

    Life (Basel, Switzerland)

    2021  Volume 11, Issue 5

    Abstract: The 2-oxoglutarate dehydrogenase complex (OGDHc) is a key enzyme in the tricarboxylic acid (TCA) cycle and represents one of the major regulators of mitochondrial metabolism through NADH and reactive oxygen species levels. The OGDHc impacts cell ... ...

    Abstract The 2-oxoglutarate dehydrogenase complex (OGDHc) is a key enzyme in the tricarboxylic acid (TCA) cycle and represents one of the major regulators of mitochondrial metabolism through NADH and reactive oxygen species levels. The OGDHc impacts cell metabolic and cell signaling pathways through the coupling of 2-oxoglutarate metabolism to gene transcription related to tumor cell proliferation and aging.
    Language English
    Publishing date 2021-04-29
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2662250-6
    ISSN 2075-1729
    ISSN 2075-1729
    DOI 10.3390/life11050407
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Catalysis of transthiolacylation in the active centers of dihydrolipoamide acyltransacetylase components of 2-oxo acid dehydrogenase complexes.

    Chakraborty, Joydeep / Nemeria, Natalia S / Farinas, Edgardo / Jordan, Frank

    FEBS open bio

    2018  Volume 8, Issue 6, Page(s) 880–896

    Abstract: The : Enzymes: 2-oxoglutarate dehydrogenase (http://www.chem.qmul.ac.uk/iubmb/enzyme/EC1/2/4/2.html); dihydrolipoamide succinyltransferase (http://www.chem.qmul.ac.uk/iubmb/enzyme/EC2/3/1/61.html); dihydrolipoamide dehydrogenase (http://www.chem.qmul ... ...

    Abstract The
    Enzymes: 2-oxoglutarate dehydrogenase (http://www.chem.qmul.ac.uk/iubmb/enzyme/EC1/2/4/2.html); dihydrolipoamide succinyltransferase (http://www.chem.qmul.ac.uk/iubmb/enzyme/EC2/3/1/61.html); dihydrolipoamide dehydrogenase (http://www.chem.qmul.ac.uk/iubmb/enzyme/EC1/8/1/4.html); pyruvate dehydrogenase (http://www.chem.qmul.ac.uk/iubmb/enzyme/EC1/2/4/1.html); dihydrolipoamide acetyltransferase (http://www.chem.qmul.ac.uk/iubmb/enzyme/EC2/3/1/12.html).
    Language English
    Publishing date 2018-06-04
    Publishing country England
    Document type Journal Article
    ZDB-ID 2651702-4
    ISSN 2211-5463
    ISSN 2211-5463
    DOI 10.1002/2211-5463.12431
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  6. Article ; Online: Progress in the experimental observation of thiamin diphosphate-bound intermediates on enzymes and mechanistic information derived from these observations.

    Jordan, Frank / Nemeria, Natalia S

    Bioorganic chemistry

    2014  Volume 57, Page(s) 251–262

    Abstract: Thiamin diphosphate (ThDP), the vitamin B1 coenzyme is an excellent representative of coenzymes, which carry out electrophilic catalysis by forming a covalent complex with their substrates. The function of ThDP is to greatly increase the acidity of two ... ...

    Abstract Thiamin diphosphate (ThDP), the vitamin B1 coenzyme is an excellent representative of coenzymes, which carry out electrophilic catalysis by forming a covalent complex with their substrates. The function of ThDP is to greatly increase the acidity of two carbon acids by stabilizing their conjugate bases, the ylide/carbene/C2-carbanion of the thiazolium ring and the C2α-carbanion/enamine, once the substrate binds to ThDP. In recent years, several ThDP-bound intermediates on such pathways have been characterized by both solution and solid-state methods. Prominent among these advances are X-ray crystallographic results identifying both oxidative and non-oxidative intermediates, rapid chemical quench followed by NMR detection of several intermediates which are stable under acidic conditions, solid-state NMR and circular dichroism detection of the states of ionization and tautomerization of the 4'-aminopyrimidine moiety of ThDP in some of the intermediates. These methods also enabled in some cases determination of the rate-limiting step in the complex series of steps. This review is an update of a review with the same title published by the authors in 2005 in this Journal. Much progress has been made in the intervening decade in the identification of the intermediates and their application to gain additional mechanistic insight.
    MeSH term(s) Animals ; Biocatalysis ; Coenzymes/chemistry ; Coenzymes/metabolism ; Humans ; Models, Molecular ; Substrate Specificity ; Thiamine Pyrophosphate/chemistry ; Thiamine Pyrophosphate/metabolism
    Chemical Substances Coenzymes ; Thiamine Pyrophosphate (Q57971654Y)
    Language English
    Publishing date 2014-09-03
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Review
    ZDB-ID 120080-x
    ISSN 1090-2120 ; 0045-2068
    ISSN (online) 1090-2120
    ISSN 0045-2068
    DOI 10.1016/j.bioorg.2014.08.002
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  7. Article ; Online: Functional Versatility of the Human 2-Oxoadipate Dehydrogenase in the L-Lysine Degradation Pathway toward Its Non-Cognate Substrate 2-Oxopimelic Acid

    Natalia S. Nemeria / Balint Nagy / Roberto Sanchez / Xu Zhang / João Leandro / Attila Ambrus / Sander M. Houten / Frank Jordan

    International Journal of Molecular Sciences, Vol 23, Iss 8213, p

    2022  Volume 8213

    Abstract: The human 2-oxoadipate dehydrogenase complex (OADHc) in L-lysine catabolism is involved in the oxidative decarboxylation of 2-oxoadipate (OA) to glutaryl-CoA and NADH (+H + ). Genetic findings have linked the DHTKD1 encoding 2-oxoadipate dehydrogenase ( ... ...

    Abstract The human 2-oxoadipate dehydrogenase complex (OADHc) in L-lysine catabolism is involved in the oxidative decarboxylation of 2-oxoadipate (OA) to glutaryl-CoA and NADH (+H + ). Genetic findings have linked the DHTKD1 encoding 2-oxoadipate dehydrogenase (E1a), the first component of the OADHc, to pathogenesis of AMOXAD, eosinophilic esophagitis (EoE), and several neurodegenerative diseases. A multipronged approach, including circular dichroism spectroscopy, Fourier Transform Mass Spectrometry, and computational approaches, was applied to provide novel insight into the mechanism and functional versatility of the OADHc. The results demonstrate that E1a oxidizes a non-cognate substrate 2-oxopimelate (OP) as well as OA through the decarboxylation step, but the OADHc was 100-times less effective in reactions producing adipoyl-CoA and NADH from the dihydrolipoamide succinyltransferase (E2o) and dihydrolipoamide dehydrogenase (E3). The results revealed that the E2o is capable of producing succinyl-CoA, glutaryl-CoA, and adipoyl-CoA. The important conclusions are the identification of: (i) the functional promiscuity of E1a and (ii) the ability of the E2o to form acyl-CoA products derived from homologous 2-oxo acids with five, six, and even seven carbon atoms. The findings add to our understanding of both the OADHc function in the L-lysine degradative pathway and of the molecular mechanisms leading to the pathogenesis associated with DHTKD1 variants.
    Keywords 2-oxoadipate dehydrogenase ; L-lysine degradation pathway ; 2-oxopimelate substrate ; 2-oxoadipate dehydrogenase complex ; E1a promiscuity ; H 2 O 2 production ; Biology (General) ; QH301-705.5 ; Chemistry ; QD1-999
    Language English
    Publishing date 2022-07-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article ; Online: Exclusive neuronal detection of KGDHC-specific subunits in the adult human brain cortex despite pancellular protein lysine succinylation.

    Dobolyi, Arpad / Bago, Attila / Palkovits, Miklos / Nemeria, Natalia S / Jordan, Frank / Doczi, Judit / Ambrus, Attila / Adam-Vizi, Vera / Chinopoulos, Christos

    Brain structure & function

    2020  Volume 225, Issue 2, Page(s) 639–667

    Abstract: The ketoglutarate dehydrogenase complex (KGDHC) consists of three different subunits encoded by OGDH (or OGDHL), DLST, and DLD, combined in different stoichiometries. DLD subunit is shared between KGDHC and pyruvate dehydrogenase complex, branched-chain ... ...

    Abstract The ketoglutarate dehydrogenase complex (KGDHC) consists of three different subunits encoded by OGDH (or OGDHL), DLST, and DLD, combined in different stoichiometries. DLD subunit is shared between KGDHC and pyruvate dehydrogenase complex, branched-chain alpha-keto acid dehydrogenase complex, and the glycine cleavage system. Despite KGDHC's implication in neurodegenerative diseases, cell-specific localization of its subunits in the adult human brain has never been investigated. Here, we show that immunoreactivity of all known isoforms of OGDHL, OGDH, and DLST was detected exclusively in neurons of surgical human cortical tissue samples identified by their morphology and visualized by double labeling with fluorescent Nissl, while being absent from glia expressing GFAP, Aldhl1, myelin basic protein, Olig2, or IBA1. In contrast, DLD immunoreactivity was evident in both neurons and glia. Specificity of anti-KGDHC subunits antisera was verified by a decrease in staining of siRNA-treated human cancer cell lines directed against the respective coding gene products; furthermore, immunoreactivity of KGDHC subunits in human fibroblasts co-localized > 99% with mitotracker orange, while western blotting of 63 post-mortem brain samples and purified recombinant proteins afforded further assurance regarding antisera monospecificity. KGDHC subunit immunoreactivity correlated with data from the Human Protein Atlas as well as RNA-Seq data from the Allen Brain Atlas corresponding to genes coding for KGDHC components. Protein lysine succinylation, however, was immunohistochemically evident in all cortical cells; this was unexpected, because this posttranslational modification requires succinyl-CoA, the product of KGDHC. In view of the fact that glia of the human brain cortex lack succinate-CoA ligase, an enzyme producing succinyl-CoA when operating in reverse, protein lysine succinylation in these cells must exclusively rely on propionate and/or ketone body metabolism or some other yet to be discovered pathway encompassing succinyl-CoA.
    MeSH term(s) Acyl Coenzyme A/analysis ; Cells, Cultured ; Cerebral Cortex/chemistry ; Female ; Humans ; Ketoglutarate Dehydrogenase Complex/analysis ; Lysine/analysis ; Male ; Neuroglia/metabolism ; Neurons/chemistry ; Protein Isoforms/analysis ; Protein Subunits/analysis
    Chemical Substances Acyl Coenzyme A ; Protein Isoforms ; Protein Subunits ; succinyl-coenzyme A (BSI27HW5EQ) ; Ketoglutarate Dehydrogenase Complex (EC 1.2.4.2) ; Lysine (K3Z4F929H6)
    Language English
    Publishing date 2020-01-25
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2273162-3
    ISSN 1863-2661 ; 1863-2653
    ISSN (online) 1863-2661
    ISSN 1863-2653
    DOI 10.1007/s00429-020-02026-5
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  9. Article ; Online: Toward an Understanding of the Structural and Mechanistic Aspects of Protein-Protein Interactions in 2-Oxoacid Dehydrogenase Complexes

    Natalia S. Nemeria / Xu Zhang / Joao Leandro / Jieyu Zhou / Luying Yang / Sander M. Houten / Frank Jordan

    Life, Vol 11, Iss 407, p

    2021  Volume 407

    Abstract: The 2-oxoglutarate dehydrogenase complex (OGDHc) is a key enzyme in the tricarboxylic acid (TCA) cycle and represents one of the major regulators of mitochondrial metabolism through NADH and reactive oxygen species levels. The OGDHc impacts cell ... ...

    Abstract The 2-oxoglutarate dehydrogenase complex (OGDHc) is a key enzyme in the tricarboxylic acid (TCA) cycle and represents one of the major regulators of mitochondrial metabolism through NADH and reactive oxygen species levels. The OGDHc impacts cell metabolic and cell signaling pathways through the coupling of 2-oxoglutarate metabolism to gene transcription related to tumor cell proliferation and aging. DHTKD1 is a gene encoding 2-oxoadipate dehydrogenase (E1a), which functions in the L-lysine degradation pathway. The potentially damaging variants in DHTKD1 have been associated to the (neuro) pathogenesis of several diseases. Evidence was obtained for the formation of a hybrid complex between the OGDHc and E1a, suggesting a potential cross talk between the two metabolic pathways and raising fundamental questions about their assembly. Here we reviewed the recent findings and advances in understanding of protein-protein interactions in OGDHc and 2-oxoadipate dehydrogenase complex (OADHc), an understanding that will create a scaffold to help design approaches to mitigate the effects of diseases associated with dysfunction of the TCA cycle or lysine degradation. A combination of biochemical, biophysical and structural approaches such as chemical cross-linking MS and cryo-EM appears particularly promising to provide vital information for the assembly of 2-oxoacid dehydrogenase complexes, their function and regulation.
    Keywords neurodegeneration ; glucose metabolism ; enzyme catalysis ; protein-protein interaction ; hydrogen exchange mass spectrometry ; protein cross-linking ; Science ; Q
    Subject code 570
    Language English
    Publishing date 2021-04-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article: Evidence for functional and regulatory cross-talk between the tricarboxylic acid cycle 2-oxoglutarate dehydrogenase complex and 2-oxoadipate dehydrogenase on the l-lysine, l-hydroxylysine and l-tryptophan degradation pathways from studies in vitro.

    Nemeria, Natalia S / Gerfen, Gary / Yang, Luying / Zhang, Xu / Jordan, Frank

    Biochimica et biophysica acta. Bioenergetics

    2018  Volume 1859, Issue 9, Page(s) 932–939

    Abstract: Herein are reported findings in vitro suggesting both functional and regulatory cross-talk between the human 2-oxoglutarate dehydrogenase complex (hOGDHc), a key regulatory enzyme within the tricarboxylic acid cycle (TCA cycle), and a novel 2-oxoadipate ... ...

    Abstract Herein are reported findings in vitro suggesting both functional and regulatory cross-talk between the human 2-oxoglutarate dehydrogenase complex (hOGDHc), a key regulatory enzyme within the tricarboxylic acid cycle (TCA cycle), and a novel 2-oxoadipate dehydrogenase complex (hOADHc) from the final degradation pathway of l-lysine, l-hydroxylysine and l-tryptophan. The following could be concluded from our studies by using hOGDHc and hOADHc assembled from their individually expressed components in vitro: (i) Different substrate preferences (k
    MeSH term(s) Adipates/metabolism ; Citric Acid Cycle ; Humans ; Hydroxylysine/metabolism ; In Vitro Techniques ; Ketoglutarate Dehydrogenase Complex/metabolism ; Ketoglutaric Acids/metabolism ; Lysine/metabolism ; Tryptophan/metabolism
    Chemical Substances Adipates ; Ketoglutaric Acids ; Hydroxylysine (2GQB349IUB) ; Tryptophan (8DUH1N11BX) ; alpha-ketoglutaric acid (8ID597Z82X) ; alpha-ketoadipic acid (BB72FKL1M2) ; Ketoglutarate Dehydrogenase Complex (EC 1.2.4.2) ; Lysine (K3Z4F929H6)
    Language English
    Publishing date 2018-05-09
    Publishing country Netherlands
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 60-7
    ISSN 1879-2596 ; 1879-260X ; 1872-8006 ; 1879-2642 ; 1879-2618 ; 1879-2650 ; 0005-2728 ; 0006-3002 ; 0005-2736 ; 0304-4165 ; 0167-4838 ; 1388-1981 ; 0167-4889 ; 0167-4781 ; 0304-419X ; 1570-9639 ; 0925-4439 ; 1874-9399
    ISSN (online) 1879-2596 ; 1879-260X ; 1872-8006 ; 1879-2642 ; 1879-2618 ; 1879-2650
    ISSN 0005-2728 ; 0006-3002 ; 0005-2736 ; 0304-4165 ; 0167-4838 ; 1388-1981 ; 0167-4889 ; 0167-4781 ; 0304-419X ; 1570-9639 ; 0925-4439 ; 1874-9399
    DOI 10.1016/j.bbabio.2018.05.001
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