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Abbehausen C, de Paiva REF, Bjornsson R, Gomes SQ, Du Z, Corbi PP, Lima FA, Farrell N. X-ray Absorption Spectroscopy Combined with Time-Dependent Density Functional Theory Elucidates Differential Substitution Pathways of Au(I) and Au(III) with Zinc Fingers. Inorg Chem 2017; 57:218-230. [DOI: 10.1021/acs.inorgchem.7b02406] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Camilla Abbehausen
- Institute of Chemistry, University of Campinas—UNICAMP, P.O. Box 6154, CEP, 13083-970 Campinas, São Paulo, Brazil
| | | | - Ragnar Bjornsson
- Science Institute, University of Iceland, Dunhagi 3,
IS-107 Reykjavik, Iceland
| | - Saulo Quintana Gomes
- Institute of Chemistry, University of Campinas—UNICAMP, P.O. Box 6154, CEP, 13083-970 Campinas, São Paulo, Brazil
| | - Zhifeng Du
- Department of Chemistry, Virginia Commonwealth University, 1001 W. Main Street, Richmond, Virginia 23284-2006, United States
| | - Pedro Paulo Corbi
- Institute of Chemistry, University of Campinas—UNICAMP, P.O. Box 6154, CEP, 13083-970 Campinas, São Paulo, Brazil
| | - Frederico Alves Lima
- Centro Nacional de Pesquisa em Energia
e Materiais, Brazilian Synchrotron Light Laboratory—LNLS, CP 6192, 13084-971 Campinas, São Paulo, Brazil
| | - Nicholas Farrell
- Department of Chemistry, Virginia Commonwealth University, 1001 W. Main Street, Richmond, Virginia 23284-2006, United States
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2
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de Paiva REF, Du Z, Peterson EJ, Corbi PP, Farrell NP. Probing the HIV-1 NCp7 Nucleocapsid Protein with Site-Specific Gold(I)–Phosphine Complexes. Inorg Chem 2017; 56:12308-12318. [DOI: 10.1021/acs.inorgchem.7b01762] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Raphael E. F. de Paiva
- Institute of Chemistry, University of Campinas − UNICAMP, P.O. Box 6154, 13083-970 Campinas-SP, Brazil
- Department of Chemistry, Virginia Commonwealth University, 1001 West Main Street, Richmond, Virginia 23284-2006, United States
| | - Zhifeng Du
- Institute of Chemistry, University of Campinas − UNICAMP, P.O. Box 6154, 13083-970 Campinas-SP, Brazil
| | - Erica J. Peterson
- Institute of Chemistry, University of Campinas − UNICAMP, P.O. Box 6154, 13083-970 Campinas-SP, Brazil
| | - Pedro P. Corbi
- Department of Chemistry, Virginia Commonwealth University, 1001 West Main Street, Richmond, Virginia 23284-2006, United States
| | - Nicholas P. Farrell
- Institute of Chemistry, University of Campinas − UNICAMP, P.O. Box 6154, 13083-970 Campinas-SP, Brazil
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3
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Villalta-Romero F, Borro L, Mandic B, Escalante T, Rucavado A, Gutiérrez JM, Neshich G, Tasic L. Discovery of small molecule inhibitors for the snake venom metalloprotease BaP1 using in silico and in vitro tests. Bioorg Med Chem Lett 2017; 27:2018-2022. [PMID: 28347665 DOI: 10.1016/j.bmcl.2017.03.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 03/02/2017] [Accepted: 03/03/2017] [Indexed: 11/19/2022]
Abstract
Snakebites represent an important public health problem, with a great number of victims with permanent sequelae or fatal outcomes, particularly in rural, agriculturally active areas. The snake venom metalloproteases (SVMPs) are the principal proteins responsible for some clinically-relevant effects, such as local and systemic hemorrhage, dermonecrosis, and myonecrosis. Because of the difficulties in neutralizing them rapidly and locally by antivenoms, the search and design of small molecules as inhibitors of SVMPs are proposed. The Bothrops asper metalloprotease P1 (BaP1) is hereby used as a target protein and by High Throughput Virtual Screening (HTVS) approach, the free access virtual libraries: ZINC, PubChem and ChEMBL, were searched for potent small molecule inhibitors. Results from the aforementioned approaches provided strong evidences on the structural requirements for the efficient BaP1 inhibition such as the presence of the pyrimidine-2,4,6-trione moiety. The two proposed compounds have also shown excellent results in performed in vitro interaction studies against BaP1.
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Affiliation(s)
- Fabian Villalta-Romero
- Chemical Biology Laboratory, Organic Chemistry Department, Institute of Chemistry, UNICAMP, Campinas, SP, Brazil
| | - Luiz Borro
- Institute of Biology, UNICAMP, Campinas, SP, Brazil
| | - Boris Mandic
- Chemical Biology Laboratory, Organic Chemistry Department, Institute of Chemistry, UNICAMP, Campinas, SP, Brazil; Faculty of Chemistry, University of Belgrade, Belgrade, Serbia
| | - Teresa Escalante
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica
| | - Alexandra Rucavado
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica
| | - Jose María Gutiérrez
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica
| | - Goran Neshich
- Brazilian Agricultural Research Corporation (EMBRAPA), National Center for Agricultural Informatics, Computational Biology Research Group, Campinas, SP, Brazil
| | - Ljubica Tasic
- Chemical Biology Laboratory, Organic Chemistry Department, Institute of Chemistry, UNICAMP, Campinas, SP, Brazil.
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4
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Du Z, de Paiva REF, Qu Y, Farrell N. Tuning the reactivity of Sp1 zinc fingers with platinum complexes. Dalton Trans 2016; 45:8712-6. [PMID: 27171123 DOI: 10.1039/c6dt01128d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2023]
Abstract
cis-DDP presents reactivity towards the transcription factor Sp1-F3, as opposed to previous observations for Sp1-F2. Replacing the ammine ligands with the chelating ethylenediamine increases the reactivity giving a unique dinuclear {Pt(en)}2-bis(cysteine)-bridged product, confirmed by study of the binding sequence ACPECP.
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Affiliation(s)
- Zhifeng Du
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA 23284-2006, USA.
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5
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Campeiro JD, Neshich IP, Sant’Anna OA, Lopes R, Ianzer D, Assakura MT, Neshich G, Hayashi MA. Identification of snake bradykinin-potentiating peptides (BPPs)-simile sequences in rat brain – Potential BPP-like precursor protein? Biochem Pharmacol 2015; 96:202-15. [DOI: 10.1016/j.bcp.2015.05.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Accepted: 05/26/2015] [Indexed: 10/23/2022]
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6
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A combined MPI-CUDA parallel solution of linear and nonlinear Poisson-Boltzmann equation. BIOMED RESEARCH INTERNATIONAL 2014; 2014:560987. [PMID: 25013789 PMCID: PMC4074970 DOI: 10.1155/2014/560987] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Revised: 05/16/2014] [Accepted: 05/18/2014] [Indexed: 11/17/2022]
Abstract
The Poisson-Boltzmann equation models the electrostatic potential generated by fixed charges on a polarizable solute immersed in an ionic solution. This approach is often used in computational structural biology to estimate the electrostatic energetic component of the assembly of molecular biological systems. In the last decades, the amount of data concerning proteins and other biological macromolecules has remarkably increased. To fruitfully exploit these data, a huge computational power is needed as well as software tools capable of exploiting it. It is therefore necessary to move towards high performance computing and to develop proper parallel implementations of already existing and of novel algorithms. Nowadays, workstations can provide an amazing computational power: up to 10 TFLOPS on a single machine equipped with multiple CPUs and accelerators such as Intel Xeon Phi or GPU devices. The actual obstacle to the full exploitation of modern heterogeneous resources is efficient parallel coding and porting of software on such architectures. In this paper, we propose the implementation of a full Poisson-Boltzmann solver based on a finite-difference scheme using different and combined parallel schemes and in particular a mixed MPI-CUDA implementation. Results show great speedups when using the two schemes, achieving an 18.9x speedup using three GPUs.
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7
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Identification of new sphingomyelinases D in pathogenic fungi and other pathogenic organisms. PLoS One 2013; 8:e79240. [PMID: 24223912 PMCID: PMC3815110 DOI: 10.1371/journal.pone.0079240] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Accepted: 09/27/2013] [Indexed: 02/06/2023] Open
Abstract
Sphingomyelinases D (SMases D) or dermonecrotic toxins are well characterized in Loxosceles spider venoms and have been described in some strains of pathogenic microorganisms, such as Corynebacterium sp. After spider bites, the SMase D molecules cause skin necrosis and occasional severe systemic manifestations, such as acute renal failure. In this paper, we identified new SMase D amino acid sequences from various organisms belonging to 24 distinct genera, of which, 19 are new. These SMases D share a conserved active site and a C-terminal motif. We suggest that the C-terminal tail is responsible for stabilizing the entire internal structure of the SMase D Tim barrel and that it can be considered an SMase D hallmark in combination with the amino acid residues from the active site. Most of these enzyme sequences were discovered from fungi and the SMase D activity was experimentally confirmed in the fungus Aspergillus flavus. Because most of these novel SMases D are from organisms that are endowed with pathogenic properties similar to those evoked by these enzymes alone, they might be associated with their pathogenic mechanisms.
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Braghini CA, Neshich IAP, Neshich G, Soardi FC, de Mello MP, Costa VP, de Vasconcellos JPC, de Melo MB. New mutation in the myocilin gene segregates with juvenile-onset open-angle glaucoma in a Brazilian family. Gene 2013; 523:50-7. [PMID: 23566828 DOI: 10.1016/j.gene.2013.02.054] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Revised: 02/14/2013] [Accepted: 02/24/2013] [Indexed: 11/28/2022]
Abstract
Mutations in the myocilin gene (MYOC) account for most cases of autosomal dominant juvenile-onset open-angle glaucoma (JOAG), an earlier and more severe form of POAG. We accessed seven members of a Brazilian JOAG family by clinical and molecular investigation. Four out of seven family members were diagnosed with JOAG. All of these patients presented high intraocular pressure and two of them were bilaterally blind. The disease onset varied from 20 to 30years old. There was a nine-year-old family member who had not yet manifested the disease, although he was also a carrier of the mutation. Ophthalmologic examination included: evaluation of the visual field and optic disc, intraocular pressure measurement, and gonioscopy. The three exons and intron/exon junctions of the MYOC gene were screened for mutations through direct sequencing of PCR-amplified DNA fragments. Mutation screening revealed an in-frame mutation in the third exon of the MYOC gene: an insertion of six nucleotides between the cDNA positions 1187 and 1188 (c.1187_1188insCCCAGA, p.D395_E396insDP). This mutation presented an autosomal dominant pattern of inheritance, segregating with the disease in four family members for three generations, and it was absent in 60 normal controls. We also performed a computational structure modeling of olfactomedin-like domain of myocilin protein and conducted in silico analysis to predict the structural changes in the myocilin protein due to the presence of the mutation. These findings may be important for future diagnosis of other presymptomatic family members, as well as for the increase of the panel of MYOC mutations and their effects on phenotype.
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Affiliation(s)
- Carolina Ayumi Braghini
- Centro de Biologia Molecular e Engenharia Genética (CBMEG), Universidade Estadual de Campinas, Avenida Cândido Rondon 400, Cidade Universitária Zeferino Vaz, Distrito de Barão Geraldo, P.O. Box 6010, 13083-875, Campinas, SP, Brazil.
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9
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Evans G, Schuldt L, Griffin MDW, Devenish SRA, Grant Pearce F, Perugini MA, Dobson RCJ, Jameson GB, Weiss MS, Gerrard JA. A tetrameric structure is not essential for activity in dihydrodipicolinate synthase (DHDPS) from Mycobacterium tuberculosis. Arch Biochem Biophys 2011; 512:154-9. [PMID: 21672512 DOI: 10.1016/j.abb.2011.05.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2011] [Revised: 05/19/2011] [Accepted: 05/20/2011] [Indexed: 11/19/2022]
Abstract
Dihydrodipicolinate synthase (DHDPS) is a validated antibiotic target for which a new approach to inhibitor design has been proposed: disrupting native tetramer formation by targeting the dimer-dimer interface. In this study, rational design afforded a variant of Mycobacterium tuberculosis, Mtb-DHDPS-A204R, with disrupted quaternary structure. X-ray crystallography (at a resolution of 2.1Å) revealed a dimeric protein with an identical fold and active-site structure to the tetrameric wild-type enzyme. Analytical ultracentrifugation confirmed the dimeric structure in solution, yet the dimeric mutant has similar activity to the wild-type enzyme. Although the affinity for both substrates was somewhat decreased, the high catalytic competency of the enzyme was surprising in the light of previous results showing that dimeric variants of the Escherichia coli and Bacillus anthracis DHDPS enzymes have dramatically reduced activity compared to their wild-type tetrameric counterparts. These results suggest that Mtb-DHDPS-A204R is similar to the natively dimeric enzyme from Staphylococcus aureus, and highlight our incomplete understanding of the role played by oligomerisation in relating protein structure and function.
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Affiliation(s)
- Genevieve Evans
- Biomolecular Interaction Centre and School of Biological Sciences, University of Canterbury, Christchurch, New Zealand
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10
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Devenish SR, Gerrard JA. The quaternary structure of Escherichia coli N-acetylneuraminate lyase is essential for functional expression. Biochem Biophys Res Commun 2009; 388:107-11. [DOI: 10.1016/j.bbrc.2009.07.128] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2009] [Accepted: 07/24/2009] [Indexed: 12/19/2022]
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11
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Crystal structure and kinetic study of dihydrodipicolinate synthase from Mycobacterium tuberculosis. Biochem J 2008; 411:351-60. [PMID: 18062777 DOI: 10.1042/bj20071360] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The three-dimensional structure of the enzyme dihydrodipicolinate synthase (KEGG entry Rv2753c, EC 4.2.1.52) from Mycobacterium tuberculosis (Mtb-DHDPS) was determined and refined at 2.28 A (1 A=0.1 nm) resolution. The asymmetric unit of the crystal contains two tetramers, each of which we propose to be the functional enzyme unit. This is supported by analytical ultracentrifugation studies, which show the enzyme to be tetrameric in solution. The structure of each subunit consists of an N-terminal (beta/alpha)(8)-barrel followed by a C-terminal alpha-helical domain. The active site comprises residues from two adjacent subunits, across an interface, and is located at the C-terminal side of the (beta/alpha)(8)-barrel domain. A comparison with the other known DHDPS structures shows that the overall architecture of the active site is largely conserved, albeit the proton relay motif comprising Tyr(143), Thr(54) and Tyr(117) appears to be disrupted. The kinetic parameters of the enzyme are reported: K(M)(ASA)=0.43+/-0.02 mM, K(M)(pyruvate)=0.17+/-0.01 mM and V(max)=4.42+/-0.08 micromol x s(-1) x mg(-1). Interestingly, the V(max) of Mtb-DHDPS is 6-fold higher than the corresponding value for Escherichia coli DHDPS, and the enzyme is insensitive to feedback inhibition by (S)-lysine. This can be explained by the three-dimensional structure, which shows that the (S)-lysine-binding site is not conserved in Mtb-DHDPS, when compared with DHDPS enzymes that are known to be inhibited by (S)-lysine. A selection of metabolites from the aspartate family of amino acids do not inhibit this enzyme. A comprehensive understanding of the structure and function of this important enzyme from the (S)-lysine biosynthesis pathway may provide the key for the design of new antibiotics to combat tuberculosis.
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Joshi SB, Kamerzell TJ, McNown C, Middaugh CR. The Interaction of Heparin/polyanions with Bovine, Porcine, and Human Growth Hormone**Sangeeta B. Joshi and Tim J. Kamerzell contributed equally to this work. J Pharm Sci 2008; 97:1368-85. [PMID: 17705152 DOI: 10.1002/jps.21056] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The interaction of polyanions with proteins is of potential pharmaceutical and cellular significance. A partial thermodynamic description of the interaction of four representative polyanions with human, bovine, and porcine growth hormone is described. A heparin bead-binding assay confirms all growth hormones bind to heparin but to varying extents. Moderate-binding constants and high ratios of bound protein to the more extended polyanions, heparin, and dextran sulfate were measured by isothermal titration calorimetry and dynamic light scattering. The binding constants and ratio of protein bound to ligand were significantly smaller for the low molecular weight polyanions phytic acid and sucrose octasulfate (SOS). The effect of polyanion binding on the bovine, porcine, and human growth hormone's (hGH) structural and colloidal stability was also explored. Heparin and dextran sulfate inhibit porcine somatotropin (pST) and bovine somatotropin (bST) aggregation to the greatest extent, as compared to phytic acid and SOS, while decreasing secondary and tertiary structural stability as measured by the temperature dependence of their circular dichroism and intrinsic fluorescence. Somewhat surprisingly, the polyanions do not appear to affect the structure or stability of hGH. The potential biological significance of growth hormone polyanion interactions is discussed.
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Affiliation(s)
- Sangeeta B Joshi
- Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, Kansas 66047, USA
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13
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Simões M, Bahia D, Zerlotini A, Torres K, Artiguenave F, Neshich G, Kuser P, Oliveira G. Single nucleotide polymorphisms identification in expressed genes of Schistosoma mansoni. Mol Biochem Parasitol 2007; 154:134-40. [PMID: 17568698 PMCID: PMC1986741 DOI: 10.1016/j.molbiopara.2007.04.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2007] [Revised: 03/30/2007] [Accepted: 04/07/2007] [Indexed: 11/16/2022]
Abstract
Single nucleotide polymorphism (SNP) markers have been shown to be useful in genetic investigations of medically important parasites and their hosts. In this paper, we describe the prediction and validation of SNPs in ESTs of Schistosoma mansoni. We used 107,417 public sequences of S. mansoni and identified 15,614 high-quality candidate SNPs in 12,184 contigs. The presence of predicted SNPs was observed in well characterized antigens and vaccine candidates such as those coding for myosin; Sm14 and Sm23; cathepsin B and triosephosphate isomerase (TPI). Additionally, SNPs were experimentally validated for the cathepsin B. A comparative model of the S. mansoni cathepsin B was built for predicting the possible consequences of amino acid substitutions on the protein structure. An analysis of the substitutions indicated that the amino acids were mostly located on the surface of the molecule, and we found no evidence for a significant conformational change of the enzyme. However, at least one of the substitutions could result in a structural modification of an epitope.
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Affiliation(s)
- Mariana Simões
- Laboratory of Cellular and Molecular Parasitology, Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Av. Augusto de Lima 1715, Belo Horizonte 30190-002, MG, Brazil
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Pearce F, Perugini M, Mckerchar H, Gerrard J. Dihydrodipicolinate synthase from Thermotoga maritima. Biochem J 2006; 400:359-66. [PMID: 16872276 PMCID: PMC1652817 DOI: 10.1042/bj20060771] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
DHDPS (dihydrodipicolinate synthase) catalyses the branch point in lysine biosynthesis in bacteria and plants and is feedback inhibited by lysine. DHDPS from the thermophilic bacterium Thermotoga maritima shows a high level of heat and chemical stability. When incubated at 90 degrees C or in 8 M urea, the enzyme showed little or no loss of activity, unlike the Escherichia coli enzyme. The active site is very similar to that of the E. coli enzyme, and at mesophilic temperatures the two enzymes have similar kinetic constants. Like other forms of the enzyme, T. maritima DHDPS is a tetramer in solution, with a sedimentation coefficient of 7.2 S and molar mass of 133 kDa. However, the residues involved in the interface between different subunits in the tetramer differ from those of E. coli and include two cysteine residues poised to form a disulfide bond. Thus the increased heat and chemical stability of the T. maritima DHDPS enzyme is, at least in part, explained by an increased number of inter-subunit contacts. Unlike the plant or E. coli enzyme, the thermophilic DHDPS enzyme is not inhibited by (S)-lysine, suggesting that feedback control of the lysine biosynthetic pathway evolved later in the bacterial lineage.
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Affiliation(s)
- F. Grant Pearce
- *School of Biological Sciences, University of Canterbury, Private Bag 4800, Christchurch 8020, New Zealand
- Correspondence may be addressed to either of the authors (email and )
| | - Matthew A. Perugini
- †Bio21 Molecular Science and Biotechnology Institute, and the Department of Biochemistry and Molecular Biology, The University of Melbourne, Melbourne, VIC 3010, Australia
| | - Hannah J. Mckerchar
- *School of Biological Sciences, University of Canterbury, Private Bag 4800, Christchurch 8020, New Zealand
| | - Juliet A. Gerrard
- *School of Biological Sciences, University of Canterbury, Private Bag 4800, Christchurch 8020, New Zealand
- Correspondence may be addressed to either of the authors (email and )
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Neshich G, Borro LC, Higa RH, Kuser PR, Yamagishi MEB, Franco EH, Krauchenco JN, Fileto R, Ribeiro AA, Bezerra GBP, Velludo TM, Jimenez TS, Furukawa N, Teshima H, Kitajima K, Bava A, Sarai A, Togawa RC, Mancini AL. The Diamond STING server. Nucleic Acids Res 2005; 33:W29-35. [PMID: 15980473 PMCID: PMC1160158 DOI: 10.1093/nar/gki397] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2005] [Revised: 03/14/2005] [Accepted: 03/14/2005] [Indexed: 11/21/2022] Open
Abstract
Diamond STING is a new version of the STING suite of programs for a comprehensive analysis of a relationship between protein sequence, structure, function and stability. We have added a number of new functionalities by both providing more structure parameters to the STING Database and by improving/expanding the interface for enhanced data handling. The integration among the STING components has also been improved. A new key feature is the ability of the STING server to handle local files containing protein structures (either modeled or not yet deposited to the Protein Data Bank) so that they can be used by the principal STING components: (Java)Protein Dossier ((J)PD) and STING Report. The current capabilities of the new STING version and a couple of biologically relevant applications are described here. We have provided an example where Diamond STING identifies the active site amino acids and folding essential amino acids (both previously determined by experiments) by filtering out all but those residues by selecting the numerical values/ranges for a set of corresponding parameters. This is the fundamental step toward a more interesting endeavor-the prediction of such residues. Diamond STING is freely accessible at http://sms.cbi.cnptia.embrapa.br and http://trantor.bioc.columbia.edu/SMS.
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Affiliation(s)
- Goran Neshich
- Núcleo de Bioinformática Estrutural, Embrapa/Informática Agropecuária Campinas, Brazil.
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16
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Neshich G, Mancini AL, Yamagishi MEB, Kuser PR, Fileto R, Pinto IP, Palandrani JF, Krauchenco JN, Baudet C, Montagner AJ, Higa RH. STING Report: convenient web-based application for graphic and tabular presentations of protein sequence, structure and function descriptors from the STING database. Nucleic Acids Res 2005; 33:D269-74. [PMID: 15608194 PMCID: PMC540065 DOI: 10.1093/nar/gki111] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2004] [Revised: 10/18/2004] [Accepted: 10/18/2004] [Indexed: 11/25/2022] Open
Abstract
The Sting Report is a versatile web-based application for extraction and presentation of detailed information about any individual amino acid of a protein structure stored in the STING Database. The extracted information is presented as a series of GIF images and tables, containing the values of up to 125 sequence/structure/function descriptors/parameters. The GIF images are generated by the Gold STING modules. The HTML page resulting from the STING Report query can be printed and, most importantly, it can be composed and visualized on a computer platform with an elementary configuration. Using the STING Report, a user can generate a collection of customized reports for amino acids of specific interest. Such a collection comes as an ideal match for a demand for the rapid and detailed consultation and documentation of data about structure/function. The inclusion of information generated with STING Report in a research report or even a textbook, allows for the increased density of its contents. STING Report is freely accessible within the Gold STING Suite at http://www.cbi.cnptia.embrapa.br, http://www.es.embnet.org/SMS/, http://gibk26.bse.kyutech.ac.jp/SMS/ and http://trantor.bioc.columbia.edu/SMS (option: STING Report).
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Affiliation(s)
- Goran Neshich
- Núcleo de Bioinformática Estrutural, Embrapa/Informática Agropecuária, 13083-886 Campinas, Brazil.
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