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Marie A, Georgescauld F, Johnson KR, Ray S, Engen JR, Ivanov AR. Native Capillary Electrophoresis-Mass Spectrometry of Near 1 MDa Non-Covalent GroEL/GroES/Substrate Protein Complexes. Adv Sci (Weinh) 2024; 11:e2306824. [PMID: 38191978 PMCID: PMC10953559 DOI: 10.1002/advs.202306824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 12/21/2023] [Indexed: 01/10/2024]
Abstract
Protein complexes are essential for proteins' folding and biological function. Currently, native analysis of large multimeric protein complexes remains challenging. Structural biology techniques are time-consuming and often cannot monitor the proteins' dynamics in solution. Here, a capillary electrophoresis-mass spectrometry (CE-MS) method is reported to characterize, under near-physiological conditions, the conformational rearrangements of ∽1 MDa GroEL upon complexation with binding partners involved in a protein folding cycle. The developed CE-MS method is fast (30 min per run), highly sensitive (low-amol level), and requires ∽10 000-fold fewer samples compared to biochemical/biophysical techniques. The method successfully separates GroEL14 (∽800 kDa), GroEL7 (∽400 kDa), GroES7 (∽73 kDa), and NanA4 (∽130 kDa) oligomers. The non-covalent binding of natural substrate proteins with GroEL14 can be detected and quantified. The technique allows monitoring of GroEL14 conformational changes upon complexation with (ATPγS)4-14 and GroES7 (∽876 kDa). Native CE-pseudo-MS3 analyses of wild-type (WT) GroEL and two GroEL mutants result in up to 60% sequence coverage and highlight subtle structural differences between WT and mutated GroEL. The presented results demonstrate the superior CE-MS performance for multimeric complexes' characterization versus direct infusion ESI-MS. This study shows the CE-MS potential to provide information on binding stoichiometry and kinetics for various protein complexes.
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Affiliation(s)
- Anne‐Lise Marie
- Barnett Institute of Chemical and Biological AnalysisDepartment of Chemistry and Chemical BiologyNortheastern University360 Huntington AvenueBostonMA02115USA
| | - Florian Georgescauld
- Barnett Institute of Chemical and Biological AnalysisDepartment of Chemistry and Chemical BiologyNortheastern University360 Huntington AvenueBostonMA02115USA
| | - Kendall R. Johnson
- Barnett Institute of Chemical and Biological AnalysisDepartment of Chemistry and Chemical BiologyNortheastern University360 Huntington AvenueBostonMA02115USA
| | - Somak Ray
- Barnett Institute of Chemical and Biological AnalysisDepartment of Chemistry and Chemical BiologyNortheastern University360 Huntington AvenueBostonMA02115USA
| | - John R. Engen
- Barnett Institute of Chemical and Biological AnalysisDepartment of Chemistry and Chemical BiologyNortheastern University360 Huntington AvenueBostonMA02115USA
| | - Alexander R. Ivanov
- Barnett Institute of Chemical and Biological AnalysisDepartment of Chemistry and Chemical BiologyNortheastern University360 Huntington AvenueBostonMA02115USA
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2
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Affiliation(s)
- John R. Engen
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02115, United States
| | - Thomas Botzanowski
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02115, United States
| | - Daniele Peterle
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02115, United States
| | - Florian Georgescauld
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02115, United States
| | - Thomas E. Wales
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02115, United States
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3
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Georgescauld F, Wales TE, Engen JR. Hydrogen deuterium exchange mass spectrometry applied to chaperones and chaperone-assisted protein folding. Expert Rev Proteomics 2019; 16:613-625. [DOI: 10.1080/14789450.2019.1633920] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Florian Georgescauld
- Sorbonne Universités, UPMC Univ. Paris 06, CNRS, Laboratoire de Biologie Moléculaire et Cellulaire des Eucaryotes, UMR8226, Institut de Biologie Physico-Chimique, Paris, France
| | - Thomas E. Wales
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA, USA
| | - John R. Engen
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA, USA
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4
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Dautant A, Henri J, Wales TE, Meyer P, Engen JR, Georgescauld F. Remodeling of the Binding Site of Nucleoside Diphosphate Kinase Revealed by X-ray Structure and H/D Exchange. Biochemistry 2019; 58:1440-1449. [PMID: 30785730 DOI: 10.1021/acs.biochem.8b01308] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
To be fully active and participate in the metabolism of phosphorylated nucleotides, most nucleoside diphosphate kinases (NDPKs) have to assemble into stable hexamers. Here we studied the role played by six intersubunit salt bridges R80-D93 in the stability of NDPK from the pathogen Mycobacterium tuberculosis ( Mt). Mutating R80 into Ala or Asn abolished the salt bridges. Unexpectedly, compensatory stabilizing mechanisms appeared for R80A and R80N mutants and we studied them by biochemical and structural methods. The R80A mutant crystallized into space group I222 that is unusual for NDPK, and its hexameric structure revealed the occurrence at the trimer interface of a stabilizing hydrophobic patch around the mutation. Functionally relevant, a trimer of the R80A hexamer showed a remodeling of the binding site. In this conformation, the cleft of the active site is more open, and then active His117 is more accessible to substrates. H/D exchange mass spectrometry analysis of the wild type and the R80A and R80N mutants showed that the remodeled region of the protein is highly solvent accessible, indicating that equilibrium between open and closed conformations is possible. We propose that such equilibrium occurs in vivo and explains how bulky substrates access the catalytic His117.
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Affiliation(s)
- Alain Dautant
- Université de Bordeaux , CNRS, Institut de Biochimie et Génétique Cellulaires, UMR5095 , 146 rue Léo Saignat , 33077 Bordeaux , France
| | - Julien Henri
- Sorbonne Universités , UPMC Univ. Paris 06, CNRS, Laboratoire de Biologie Moléculaire et Cellulaire des Eucaryotes, UMR8226, Institut de Biologie Physico-Chimique , 13 rue Pierre et Marie Curie , 75005 Paris , France
| | - Thomas E Wales
- Department of Chemistry and Chemical Biology , Northeastern University , Boston , Massachusetts 02115 , United States
| | - Philippe Meyer
- Sorbonne Universités , UPMC Univ. Paris 06, CNRS, Laboratoire de Biologie Moléculaire et Cellulaire des Eucaryotes, UMR8226, Institut de Biologie Physico-Chimique , 13 rue Pierre et Marie Curie , 75005 Paris , France
| | - John R Engen
- Department of Chemistry and Chemical Biology , Northeastern University , Boston , Massachusetts 02115 , United States
| | - Florian Georgescauld
- Sorbonne Universités , UPMC Univ. Paris 06, CNRS, Laboratoire de Biologie Moléculaire et Cellulaire des Eucaryotes, UMR8226, Institut de Biologie Physico-Chimique , 13 rue Pierre et Marie Curie , 75005 Paris , France
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Dautant A, Meyer P, Georgescauld F. Hydrogen/Deuterium Exchange Mass Spectrometry Reveals Mechanistic Details of Activation of Nucleoside Diphosphate Kinases by Oligomerization. Biochemistry 2017; 56:2886-2896. [DOI: 10.1021/acs.biochem.7b00282] [Citation(s) in RCA: 5] [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: 12/21/2022]
Affiliation(s)
- Alain Dautant
- Université
de Bordeaux, CNRS, Institut de Biochimie et Génétique
Cellulaires, UMR 5095, Bordeaux, France
| | - Philippe Meyer
- Sorbonne Universités,
UPMC Univ. Paris 06, CNRS, Laboratoire de Biologie Moléculaire
et Cellulaire des Eucaryotes, UMR 8226, Institut de Biologie Physico-Chimique, 13 rue Pierre et Marie Curie, 75005 Paris, France
| | - Florian Georgescauld
- Sorbonne Universités,
UPMC Univ. Paris 06, CNRS, Laboratoire de Biologie Moléculaire
et Cellulaire des Eucaryotes, UMR 8226, Institut de Biologie Physico-Chimique, 13 rue Pierre et Marie Curie, 75005 Paris, France
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Georgescauld F, Moynié L, Habersetzer J, Dautant A. Structure of Mycobacterium tuberculosis nucleoside diphosphate kinase R80N mutant in complex with citrate. Acta Crystallogr F Struct Biol Commun 2014; 70:40-3. [PMID: 24419614 PMCID: PMC3943099 DOI: 10.1107/s2053230x13034134] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Accepted: 12/18/2013] [Indexed: 11/10/2022] Open
Abstract
The crystal structure of the wild-type nucleoside diphosphate kinase from Mycobacterium tuberculosis at 2.6 Å resolution revealed that the intersubunit salt bridge Arg80-Asp93 contributes to the thermal stability of the hexamer (Tm = 76°C). On mutating Asp93 to Asn to break the salt bridge, the thermal stability dramatically decreased by 27.6°C. Here, on mutating Arg80 to Asn, the thermal stability also significantly decreased by 8.0°C. In the X-ray structure of the R80N mutant solved at 1.9 Å resolution the salt bridge was replaced by intersubunit hydrogen bonds that contribute to the thermal stability of the hexamer. A citrate anion from the crystallization buffer was bound at the bottom of the nucleotide-binding site via electrostatic and hydrogen-bonding interactions with six conserved residues involved in nucleotide binding. Structural analysis shows that the citrate is present at the location of the nucleotide phosphate groups.
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Affiliation(s)
- Florian Georgescauld
- Institut de Biochimie et de Génétique Cellulaires, UMR 5095, CNRS, 1 Rue Camille Saint-Saëns, 33077 Bordeaux, France
- Institut de Biochimie et de Génétique Cellulaires, UMR 5095, Bordeaux University, 1 Rue Camille Saint-Saëns, Bordeaux, France
| | - Lucile Moynié
- Institut de Biochimie et de Génétique Cellulaires, UMR 5095, CNRS, 1 Rue Camille Saint-Saëns, 33077 Bordeaux, France
- Institut de Biochimie et de Génétique Cellulaires, UMR 5095, Bordeaux University, 1 Rue Camille Saint-Saëns, Bordeaux, France
| | - Johann Habersetzer
- Institut de Biochimie et de Génétique Cellulaires, UMR 5095, CNRS, 1 Rue Camille Saint-Saëns, 33077 Bordeaux, France
- Institut de Biochimie et de Génétique Cellulaires, UMR 5095, Bordeaux University, 1 Rue Camille Saint-Saëns, Bordeaux, France
| | - Alain Dautant
- Institut de Biochimie et de Génétique Cellulaires, UMR 5095, CNRS, 1 Rue Camille Saint-Saëns, 33077 Bordeaux, France
- Institut de Biochimie et de Génétique Cellulaires, UMR 5095, Bordeaux University, 1 Rue Camille Saint-Saëns, Bordeaux, France
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Georgescauld F, Moynié L, Habersetzer J, Cervoni L, Mocan I, Borza T, Harris P, Dautant A, Lascu I. Intersubunit ionic interactions stabilize the nucleoside diphosphate kinase of Mycobacterium tuberculosis. PLoS One 2013; 8:e57867. [PMID: 23526954 PMCID: PMC3589492 DOI: 10.1371/journal.pone.0057867] [Citation(s) in RCA: 11] [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: 10/26/2012] [Accepted: 01/27/2013] [Indexed: 01/10/2023] Open
Abstract
Most nucleoside diphosphate kinases (NDPKs) are hexamers. The C-terminal tail interacting with the neighboring subunits is crucial for hexamer stability. In the NDPK from Mycobacterium tuberculosis (Mt) this tail is missing. The quaternary structure of Mt-NDPK is essential for full enzymatic activity and for protein stability to thermal and chemical denaturation. We identified the intersubunit salt bridge Arg80-Asp93 as essential for hexamer stability, compensating for the decreased intersubunit contact area. Breaking the salt bridge by the mutation D93N dramatically decreased protein thermal stability. The mutation also decreased stability to denaturation by urea and guanidinium. The D93N mutant was still hexameric and retained full activity. When exposed to low concentrations of urea it dissociated into folded monomers followed by unfolding while dissociation and unfolding of the wild type simultaneously occur at higher urea concentrations. The dissociation step was not observed in guanidine hydrochloride, suggesting that low concentration of salt may stabilize the hexamer. Indeed, guanidinium and many other salts stabilized the hexamer with a half maximum effect of about 0.1 M, increasing protein thermostability. The crystal structure of the D93N mutant has been solved.
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Affiliation(s)
- Florian Georgescauld
- IBGC, University Bordeaux, Bordeaux, France
- IBGC, CNRS UMR 5095, Bordeaux, France
| | - Lucile Moynié
- IBGC, University Bordeaux, Bordeaux, France
- IBGC, CNRS UMR 5095, Bordeaux, France
| | - Johann Habersetzer
- IBGC, University Bordeaux, Bordeaux, France
- IBGC, CNRS UMR 5095, Bordeaux, France
| | - Laura Cervoni
- Dipartimento di Scienze Biochimiche “A. Rossi Fanelli”, Università degli Studi “La Sapienza”, Roma, Italy
| | - Iulia Mocan
- IBGC, University Bordeaux, Bordeaux, France
- IBGC, CNRS UMR 5095, Bordeaux, France
| | - Tudor Borza
- Laboratoire de Chimie Structurale des Macromolécules, CNRS URA 2185, Institut Pasteur, Paris, France
| | - Pernile Harris
- Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Alain Dautant
- IBGC, University Bordeaux, Bordeaux, France
- IBGC, CNRS UMR 5095, Bordeaux, France
- * E-mail: (AD); (IL)
| | - Ioan Lascu
- IBGC, University Bordeaux, Bordeaux, France
- IBGC, CNRS UMR 5095, Bordeaux, France
- * E-mail: (AD); (IL)
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Boissier F, Georgescauld F, Moynié L, Dupuy JW, Sarger C, Podar M, Lascu I, Giraud MF, Dautant A. An intersubunit disulfide bridge stabilizes the tetrameric nucleoside diphosphate kinase of Aquifex aeolicus. Proteins 2012; 80:1658-68. [DOI: 10.1002/prot.24062] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2011] [Revised: 01/23/2012] [Accepted: 02/06/2012] [Indexed: 12/19/2022]
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Georgescauld F, Sabaté R, Espargaró A, Ventura S, Chaignepain S, Lacombe ML, Lascu I. Aggregation of the neuroblastoma-associated mutant (S120G) of the human nucleoside diphosphate kinase-A/NM23-H1 into amyloid fibrils. Naunyn Schmiedebergs Arch Pharmacol 2011; 384:373-81. [PMID: 21484438 DOI: 10.1007/s00210-011-0628-8] [Citation(s) in RCA: 5] [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] [Received: 12/26/2010] [Accepted: 03/23/2011] [Indexed: 01/25/2023]
Abstract
The human nucleoside diphosphate (NDP) kinase A, product of the NME1 gene also named NM23-H1, is known as a metastasis suppressor protein. A naturally occurring variant, S120G, identified in neuroblastomas, possesses native three-dimensional structure and enzymatic activity but displays reduced conformational stability and a folding defect with the accumulation of a "molten globule" folding intermediate during refolding in vitro. As such intermediate has been postulated to be involved in amyloid formation, NDP kinase A may serve as a model protein for studying the relationship between folding intermediates and amyloid fibrils. The NDP kinase A S120G was heated in phosphate buffer (pH 7.0). The protein precipitated as amyloid fibrils, as demonstrated by electron microscopy, Congo red, and thioflavin T binding and FTIR spectroscopy. The NDP kinase A S120G, at neutral pH and at moderate temperature experiences a transition towards amyloid fibrils. The aggregation process was faster if seeded by preformed fibrils. The fibrils presented a large proteinase K-resistant core not including residue Gly 120, as shown by mass spectrometry. This suggests that the aggregation process is triggered by the reduced stability of the S120G variant and not by a specific increase in the kinase domain intrinsic aggregation propensity at the place of mutation. This constitutes one of the few reports on a protein involved in cancer biology able to aggregate into amyloid structures under mild conditions.
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Affiliation(s)
- Florian Georgescauld
- Institut de Biochimie et Génétique Cellulaires, UMR 5095 University Bordeaux-2 and CNRS, 1 rue Camille St Saëns, 33077, Bordeaux cedex, France
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Georgescauld F, Mocan I, Lacombe ML, Lascu I. Rescue of the neuroblastoma mutant of the human nucleoside diphosphate kinase A/nm23-H1 by the natural osmolyte trimethylamine-N-oxide. FEBS Lett 2009; 583:820-4. [DOI: 10.1016/j.febslet.2009.01.043] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2008] [Revised: 01/06/2009] [Accepted: 01/22/2009] [Indexed: 11/27/2022]
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Mocan I, Georgescauld F, Gonin P, Thoraval D, Cervoni L, Giartosio A, Dabernat-Arnaud S, Crouzet M, Lacombe ML, Lascu I. Protein phosphorylation corrects the folding defect of the neuroblastoma (S120G) mutant of human nucleoside diphosphate kinase A/Nm23-H1. Biochem J 2007; 403:149-56. [PMID: 17155928 PMCID: PMC1828887 DOI: 10.1042/bj20061141] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Human nucleoside diphosphate (NDP) kinase A is a 'house-keeping' enzyme essential for the synthesis of nonadenine nucleoside (and deoxynucleoside) 5'-triphosphate. It is involved in complex cellular regulatory functions including the control of metastatic tumour dissemination. The mutation S120G has been identified in high-grade neuroblastomas. We have shown previously that this mutant has a folding defect: the urea-denatured protein could not refold in vitro. A molten globule folding intermediate accumulated, whereas the wild-type protein folded and associated into active hexamers. In the present study, we report that autophosphorylation of the protein corrected the folding defect. The phosphorylated S120G mutant NDP kinase, either autophosphorylated with ATP as donor, or chemically prosphorylated by phosphoramidate, refolded and associated quickly with high yield. Nucleotide binding had only a small effect. ADP and the non-hydrolysable ATP analogue 5'-adenyly-limido-diphosphate did not promote refolding. ATP-promoted refolding was strongly inhibited by ADP, indicating protein dephosphorylation. Our findings explain why the mutant enzyme is produced in mammalian cells and in Escherichia coli in a soluble form and is active, despite the folding defect of the S120G mutant observed in vitro. We generated an inactive mutant kinase by replacing the essential active-site histidine residue at position 118 with an asparagine residue, which abrogates the autophosphorylation. The double mutant H118N/S120G was expressed in inclusion bodies in E. coli. Its renaturation stops at a folding intermediate and cannot be reactivated by ATP in vitro. The transfection of cells with this double mutant might be a good model to study the cellular effects of folding intermediates.
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Affiliation(s)
- Iulia Mocan
- *Institut de Biochimie et Génétique Cellulaires (UMR 5095), Université Victor Segalen Bordeaux2 and CNRS, 33077 Bordeaux Cedex, France
| | - Florian Georgescauld
- *Institut de Biochimie et Génétique Cellulaires (UMR 5095), Université Victor Segalen Bordeaux2 and CNRS, 33077 Bordeaux Cedex, France
| | - Philippe Gonin
- *Institut de Biochimie et Génétique Cellulaires (UMR 5095), Université Victor Segalen Bordeaux2 and CNRS, 33077 Bordeaux Cedex, France
| | - Didier Thoraval
- *Institut de Biochimie et Génétique Cellulaires (UMR 5095), Université Victor Segalen Bordeaux2 and CNRS, 33077 Bordeaux Cedex, France
| | - Laura Cervoni
- †Dipartimento di Scienze Biochimiche ‘A. Rossi Fanelli’ and the Center of Molecular Biology of Consiglio Nazionale delle Ricerche, Università degli Studi ‘La Sapienza’, 00185 Rome, Italy
| | - Anna Giartosio
- †Dipartimento di Scienze Biochimiche ‘A. Rossi Fanelli’ and the Center of Molecular Biology of Consiglio Nazionale delle Ricerche, Università degli Studi ‘La Sapienza’, 00185 Rome, Italy
| | | | - Marc Crouzet
- *Institut de Biochimie et Génétique Cellulaires (UMR 5095), Université Victor Segalen Bordeaux2 and CNRS, 33077 Bordeaux Cedex, France
| | - Marie-Lise Lacombe
- §Unité 680 INSERM, Faculté de Médecine Pierre et Marie Curie, site Saint-Antoine, 75012 Paris, France
| | - Ioan Lascu
- *Institut de Biochimie et Génétique Cellulaires (UMR 5095), Université Victor Segalen Bordeaux2 and CNRS, 33077 Bordeaux Cedex, France
- To whom correspondence should be addressed (email )
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Moynié L, Giraud MF, Georgescauld F, Lascu I, Dautant A. The structure of the Escherichia coli nucleoside diphosphate kinase reveals a new quaternary architecture for this enzyme family. Proteins 2007; 67:755-65. [PMID: 17330300 DOI: 10.1002/prot.21316] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [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
Nucleoside diphosphate kinase (NDPK) catalyzes the transfer of gamma-phosphate from nucleoside triphosphates to nucleoside diphosphates. The subunit folding and the dimeric basic structural unit are remarkably the same for available structures but, depending on species, dimers self-associate to form hexamers or tetramers. The crystal structure of the Escherichia coli NDPK reveals a new tetrameric quaternary structure for this protein family. The two tetramers differ by the relative orientation of interacting dimers, which face either the convex or the concave side of their central sheet as in either Myxococcus xanthus (type I) or E. coli (type II), respectively. In the type II tetramer, the subunits interact by a new interface harboring a zone called the Kpn loop as in hexamers, but by the opposite face of this loop. The evolutionary conservation of the interface residues indicates that this new quaternary structure seems to be the most frequent assembly mode in bacterial tetrameric NDP kinases.
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Affiliation(s)
- Lucile Moynié
- Institut de Biochimie et Génétique Cellulaires, UMR 5095 CNRS-Université Victor Segalen Bordeaux 2, 33077 Bordeaux cedex, France
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Giraud MF, Georgescauld F, Lascu I, Dautant A. Crystal structures of S120G mutant and wild type of human nucleoside diphosphate kinase A in complex with ADP. J Bioenerg Biomembr 2006; 38:261-4. [PMID: 16944299 DOI: 10.1007/s10863-006-9043-0] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [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: 12/05/2005] [Accepted: 01/04/2006] [Indexed: 10/24/2022]
Abstract
Nm23 was the first metastasis suppressor gene identified. This gene encodes a NDP kinase that also exhibits other properties like histidine protein kinase and interactions with proteins and DNA. The S120G mutant of NDPK-A has been identified in aggressive neuroblastomas and has been found to reduce the metastasis suppressor effect of Nm23. In order to understand the differences between the wild type and the S120G mutant, we have determined the structure of both mutant and wild type NDPK-A in complex with ADP. Our results reveal that there are no significant changes between the two enzyme versions even in the surroundings of the catalytic histidine that is required for NDP kinase activity. This suggests that the S120G mutation may affect an other protein property than NDP kinase activity.
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Affiliation(s)
- Marie-France Giraud
- Institut de Biochimie et Génétique Cellulaires, UMR 5095 CNRS-Université Victor Segalen Bordeaux 2, 1 rue Camille Saint-Saëns, 33077 Bordeaux cedex, France
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