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Okabayashi R, Ohta Y, Yokozawa T. Control of Molecular Weight and End-Functional Groups of Polyester from A2 + B2 Polycondensation via Cross-Metathesis of Cyclic Unsaturated Polyester with Difunctional Olefin. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b02089] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ryouichi Okabayashi
- Department of Materials and Life Chemistry, Kanagawa University,
Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - Yoshihiro Ohta
- Department of Materials and Life Chemistry, Kanagawa University,
Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - Tsutomu Yokozawa
- Department of Materials and Life Chemistry, Kanagawa University,
Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
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2
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Okoth R, Basu A. End-labeled amino terminated monotelechelic glycopolymers generated by ROMP and Cu(I)-catalyzed azide-alkyne cycloaddition. Beilstein J Org Chem 2013; 9:608-12. [PMID: 23616802 PMCID: PMC3628285 DOI: 10.3762/bjoc.9.66] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2012] [Accepted: 03/06/2013] [Indexed: 11/23/2022] Open
Abstract
Functionalizable monotelechelic polymers are useful materials for chemical biology and materials science. We report here the synthesis of a capping agent that can be used to terminate polymers prepared by ring-opening metathesis polymerization of norbornenes bearing an activated ester. The terminating agent is a cis-butene derivative bearing a Teoc (2-trimethylsilylethyl carbamate) protected primary amine. Post-polymerization modification of the polymer was accomplished by amidation with an azido-amine linker followed by Cu(I)-catalyzed azide–alkyne cycloaddition with propargyl sugars. Subsequent Teoc deprotection and conjugation with pyrenyl isothiocyanates afforded well-defined end-labeled glycopolymers.
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Affiliation(s)
- Ronald Okoth
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, USA
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3
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Iguchi H, Takaishi S, Breedlove BK, Yamashita M, Matsuzaki H, Okamoto H. Controlling the electronic states and physical properties of MMX-type diplatinum-iodide chain complexes via binary countercations. Inorg Chem 2012; 51:9967-77. [PMID: 22946488 DOI: 10.1021/ic301469u] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
MMX-type quasi-one-dimensional iodide-bridged dinuclear Pt complexes (MMX chains) with binary countercations show a new alternating charge-polarization + charge-density-wave (ACP+CDW) electronic state and reversible switching of the electronic states and physical properties upon dehydration and rehydration process. By comparing several MMX chains with various binary countercations with previous chains, we found that the short backbone of the aliphatic diammonium ion was indispensable for realizing the ACP+CDW state because it induces a 2-fold periodicity along the chain axis via twisting of the ligands. Moreover, the reversibility of the changes in the structure and electrical conductivity upon dehydration and rehydration depend on the length of aliphatic diammonium ion. Short diammonium ions support a robust framework, which undergoes reversible structural changes. On the other hand, long and bent aliphatic diammonium ions weaken the framework, which causes partial degradation of the crystal and a decrease in the electrical conductivity when the structure changes. However, the decrease in the activation energy of the electrical conductivity after the dehydration process is independent of the robustness of the complex, indicating that the orbital overlap in MMX chains with binary countercations increases upon dehydration. Controllable electronic states and physical properties provide a platform for designing the multifunctional materials based on MMX chains.
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Affiliation(s)
- Hiroaki Iguchi
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aza-aoba, Aramaki, Sendai 980-8578, Japan.
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Nau WM, Ghale G, Hennig A, Bakirci H, Bailey DM. Substrate-Selective Supramolecular Tandem Assays: Monitoring Enzyme Inhibition of Arginase and Diamine Oxidase by Fluorescent Dye Displacement from Calixarene and Cucurbituril Macrocycles. J Am Chem Soc 2009; 131:11558-70. [DOI: 10.1021/ja904165c] [Citation(s) in RCA: 184] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Werner M. Nau
- School of Engineering and Science, Jacobs University Bremen, Campus Ring 1, D-28759 Bremen, Germany
| | - Garima Ghale
- School of Engineering and Science, Jacobs University Bremen, Campus Ring 1, D-28759 Bremen, Germany
| | - Andreas Hennig
- School of Engineering and Science, Jacobs University Bremen, Campus Ring 1, D-28759 Bremen, Germany
| | - Hüseyin Bakirci
- School of Engineering and Science, Jacobs University Bremen, Campus Ring 1, D-28759 Bremen, Germany
| | - David M. Bailey
- School of Engineering and Science, Jacobs University Bremen, Campus Ring 1, D-28759 Bremen, Germany
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5
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Yraola F, Zorzano A, Albericio F, Royo M. Structure-activity relationships of SSAO/VAP-1 arylalkylamine-based substrates. ChemMedChem 2009; 4:495-503. [PMID: 19266512 DOI: 10.1002/cmdc.200800393] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Semicarbazide-sensitive amine oxidase/vascular adhesion protein-1 (SSAO/VAP-1) substrates show insulin-mimetic effects and are therefore potentially valuable molecules for the treatment of diabetes mellitus. Herein we review several structural and electronic aspects of SSAO arylalkylamine-based substrates. Two main modifications directly affect amine oxidase (AO) activity: 1) variation in ring substitution modulates the biological activity of the arylalkylamine ligand by converting a substrate into a substrate-like inhibitor, and 2) variation in the number of methylene units between the aromatic ring and the ammonium groups of the arylalkylamine substrates dramatically alters the oxidation rate between species. Furthermore, we review relevant information about mammalian SSAO/VAP-1 substrate selectivity and specificity over monoamine oxidases (MAOs).
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6
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Mura A, Anedda R, Pintus F, Casu M, Padiglia A, Floris G, Medda R. An important lysine residue in copper/quinone-containing amine oxidases. FEBS J 2007; 274:2585-95. [PMID: 17433047 DOI: 10.1111/j.1742-4658.2007.05793.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The interaction of xenon with copper/6-hydroxydopa (2,4,5-trihydroxyphenethylamine) quinone (TPQ) amine oxidases from the plant pulses lentil (Lens esculenta) and pea (Pisum sativum) (seedlings), the perennial Mediterranean shrub Euphorbia characias (latex), and the mammals cattle (serum) and pigs (kidney), were investigated by NMR and optical spectroscopy of the aqueous solutions of the enzymes. (129)Xe chemical shift provided evidence of xenon binding to one or more cavities of all these enzymes, and optical spectroscopy showed that under 10 atm of xenon gas, and in the absence of a substrate, the plant enzyme cofactor (TPQ), is converted into its reduced semiquinolamine radical. The kinetic parameters of the analyzed plant amine oxidases showed that the k(c) value of the xenon-treated enzymes was reduced by 40%. Moreover, whereas the measured K(m) value for oxygen and for the aromatic monoamine benzylamine was shown to be unchanged, the K(m) value for the diamine putrescine increased remarkably after the addition of xenon. Under the same experimental conditions, the TPQ of bovine serum amine oxidase maintained its oxidized form, whereas in pig kidney, the reduced aminoquinol species was formed without the radical species. Moreover the k(c) value of the xenon-treated pig enzyme in the presence of both benzylamine and cadaverine was shown to be dramatically reduced. It is proposed that the lysine residue at the active site of amine oxidase could be involved both in the formation of the reduced TPQ and in controlling catalytic activity.
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Affiliation(s)
- Anna Mura
- Department of Applied Sciences in Biosystems, University of Cagliari, Monserrato, CA, Italy
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7
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Sebela M, Tylichová M, Pec P. Inhibition of diamine oxidases and polyamine oxidases by diamine-based compounds. J Neural Transm (Vienna) 2007; 114:793-8. [PMID: 17385064 DOI: 10.1007/s00702-007-0690-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2006] [Accepted: 11/20/2006] [Indexed: 11/25/2022]
Abstract
This review reports on inhibitors of copper-containing amine oxidases and flavoprotein polyamine oxidases, which are structurally based on diamines. In the introduction, basic characteristics and classification of amine oxidases are described together with the significance of their synthetic inhibitors. The following text is divided into several chapters, which deal with diaminoketones, aza-diamines, unsaturated diamine analogs and diamines with heterocyclic substituents. Then it continues with diamine- and agmatine-based inhibitors of polyamine oxidases. Each chapter gives detailed information on the inhibition mode, potency and structural relationships. The conclusion points out possible roles of mechanism-based inhibitors of amine oxidases in physiological and medicinal research.
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Affiliation(s)
- M Sebela
- Department of Biochemistry, Faculty of Science, Palacký University, Olomouc, Czech Republic
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Scherman OA, Ligthart GBWL, Ohkawa H, Sijbesma RP, Meijer EW. Olefin metathesis and quadruple hydrogen bonding: a powerful combination in multistep supramolecular synthesis. Proc Natl Acad Sci U S A 2006; 103:11850-5. [PMID: 16877543 PMCID: PMC1832257 DOI: 10.1073/pnas.0602413103] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
We show that combining concepts generally used in covalent organic synthesis such as retrosynthetic analysis and the use of protecting groups, and applying them to the self-assembly of polymeric building blocks in multiple steps, results in a powerful strategy for the self-assembly of dynamic materials with a high level of architectural control. We present a highly efficient synthesis of bifunctional telechelic polymers by ring-opening metathesis polymerization (ROMP) with complementary quadruple hydrogen-bonding motifs. Because the degree of functionality for the polymers is 2.0, the formation of alternating, blocky copolymers was demonstrated in both solution and the bulk leading to stable, microphase-separated copolymer morphologies.
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Affiliation(s)
- Oren A. Scherman
- Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - G. B. W. L. Ligthart
- Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Haruki Ohkawa
- Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Rint P. Sijbesma
- Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
- *To whom correspondence may be addressed. E-mail:
or
| | - E. W. Meijer
- Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
- *To whom correspondence may be addressed. E-mail:
or
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9
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Lamplot Z, Sebela M, Frycák P, Longu S, Padiglia A, Medda R, Floris G, Pec P. Reactions of plant copper/topaquinone amine oxidases with N6-aminoalkyl derivatives of adenine. J Enzyme Inhib Med Chem 2005; 20:143-51. [PMID: 15968819 DOI: 10.1080/14756360400021866] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
Plant copper/topaquinone-containing amine oxidases (CAOs, EC 1.4.3.6) are enzymes oxidising various amines. Here we report a study on the reactions of CAOs from grass pea (Lathyrus sativus), lentil (Lens esculenta) and Euphorbia characias, a Mediterranean shrub, with N6-aminoalkyl adenines representing combined analogues of cytokinins and polyamines. The following compounds were synthesised: N6-(3-aminopropyl)adenine, N6-(4-aminobutyl)adenine, N6-(4-amino-trans-but-2-enyl) adenine, N6-(4-amino-cis-but-2-enyl) adenine and N6-(4-aminobut-2-ynyl) adenine. From these, N6-(4-aminobutyl) adenine and N6-(4-amino-trans-but-2-enyl)adenine were found to be substrates for all three enzymes (Km approximately 10(-4)M). Absorption spectroscopy demonstrated such an interaction with the cofactor topaquinone, which is typical for common diamine substrates. However, only the former compound provided a regular reaction stoichiometry. Anaerobic absorption spectra of N6-(3-aminopropyl)adenine, N6-(4-amino-cis-but-2-enyl)adenine and N6-(4-aminobut-2-ynyl)adenine reactions revealed a similar kind of initial interaction, although the compounds finally inhibited the enzymes. Kinetic measurements allowed the determination of both inhibition type and strength; N6-(3-aminopropyl)adenine and N6-(4-amino-cis-but-2-enyl)adenine produced reversible inhibition (Ki approximately 10(-5) - 10(-4) M) whereas, N6-(4-aminobut-2-ynyl)adenine could be considered a powerful inactivator.
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Affiliation(s)
- Zbynĕk Lamplot
- Department of Biochemistry, Faculty of Science, Palacký University, Slechtitelu 11, CZ-783 71 Olomouc, Czech Republic
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10
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Jeon HB, Lee Y, Qiao C, Huang H, Sayre LM. Inhibition of bovine plasma amine oxidase by 1,4-diamino-2-butenes and -2-butynes. Bioorg Med Chem 2003; 11:4631-41. [PMID: 14527560 DOI: 10.1016/s0968-0896(03)00521-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Bovine plasma amine oxidase (BPAO) was previously shown to be irreversibly inhibited by propargylamine and 2-chloroallylamine. 1,4-Diamine versions of these two compounds are here shown to be highly potent inactivators, with IC50 values near 20 microM. Mono-N-alkylation or N,N-dialkylation greatly lowered the inactivation potency in every case, whereas the mono-N-acyl derivatives were also weaker inhibitors and enzyme activity was recoverable. The finding that the bis-primary amines 1,4-diamino-2-butyne (a known potent inhibitor of diamine oxidases) and Z-2-chloro-1,4-diamino-2-butene are potent inactivators of BPAO is suggestive of unexpected similarities between plasma amine oxidase and the diamine oxidases and implies that it may be unwise to attempt to develop selective inhibitors of diamine oxidase using a diamine construct.
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Affiliation(s)
- Heung-Bae Jeon
- Department of Chemistry, Case Western Reserve University, Cleveland, OH 44106, USA
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11
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Martin B, Possémé F, Le Barbier C, Carreaux F, Carboni B, Seiler N, Moulinoux JP, Delcros JG. (Z)-1,4-diamino-2-butene as a vector of boron, fluorine, or iodine for cancer therapy and imaging: synthesis and biological evaluation. Bioorg Med Chem 2002; 10:2863-71. [PMID: 12110306 DOI: 10.1016/s0968-0896(02)00147-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Polyamine vectors are attractive for tumor targeting. We envisaged (Z)-1,4-diamino-2-butene (Z-DAB), an unsaturated analogue of putrescine as vector of (10)B, (18)F and (131)I for boron neutron capture therapy (BNCT), and tumor imaging by positron emission tomography or scintigraphy respectively. In the present work, the synthesis and characterization of new derivatives of Z-DAB were reported. Z-DAB was actively transported in cells via the polyamine transport system and converted into the spermidine analogue.(E)-2-iodo-1,4-diamino-2-butene (E-I-DAB) was not taken up by the polyamine transport system and may not be suitable for tumor imaging. In contrast, (Z)-2-[4-(5,5-dimethyl-dioxaborinan-2-yl)phenyl]methyl-1,4-diamino-2-butene (Z-4-Bbz-DAB) was a substrate of the transport system and allowed significant boron accumulation in 3LL cells. Its potential in BNCT will be evaluated.
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Affiliation(s)
- Bénédicte Martin
- Groupe de Recherche en Thérapeutiques Anticancéreuses, CNRS FRE 2261, Faculté de Médecine, 2, Avenue du Pr. Léon Bernard, F35043 cedex, Rennes, France
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12
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Copper/topa quinone-containing amine oxidases — Recent research developments. ACTA ACUST UNITED AC 2002. [DOI: 10.1016/s1572-5995(02)80028-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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13
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Sebela M, Frébort I, Lemr K, Brauner F, Pec P. A study on the reactions of plant copper amine oxidase with C3 and C4 aliphatic diamines. Arch Biochem Biophys 2000; 384:88-99. [PMID: 11147840 DOI: 10.1006/abbi.2000.2081] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The paper reports a study on the reactions of grass pea (Lathyrus sativus) amine oxidase (GPAO) with several aliphatic diamines. The influence of the chain length and of unsaturations in the molecules was examined. Kinetic measurements confirmed that trans-, i.e., (E)-2-butene-1,4-diamine (TDABE) and cis-, i.e., (Z)-2-butene-1,4-diamine (CDABE) could be classified as good substrates. Propane-1,3-diamine (DAP) and propene-1,3-diamine (DAPE) were only weakly oxidized, whereas 1,3-diamino-2-propanol (DAPL) was not utilized as a substrate. Contrary to the inactivator 2-butyne-1,4-diamine (DABI), DAPE was shown to be only a competitive inhibitor. DAP itself did not inhibit the catalytic activity. Irreversible inhibition of the activity occurred only after the incubation of GPAO with DABI; other diamines were without this effect. Differential pulse polarography and chromatofocusing confirmed that the aminoaldehyde product of DABI oxidation binds to the enzyme. Activity assay of pea aminoaldehyde dehydrogenase enabled us to detect the products of the oxidation of TDABE, CDABE, and DAP by GPAO. As the product of DAP oxidation, 3-amino-propanal (APAL) was detected by mass spectrometry and confirmed to be a potent noncompetitive inhibitor of GPAO. The absorption changes that occurred in the course of the reaction of GPAO with the diamines were investigated using rapid-scanning spectrophotometry. DABI, TDABE, CDABE, DAP, and DAPE reacted with GPAO providing characteristic maxima of the Cu(I)-semiquinolamine species that is formed in the catalytic cycle. The results presented here confirm that with the exception of DAPL, all the studied diamines could be classified as GPAO substrates, but only DABI can be considered as a mechanism-based inhibitor.
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Affiliation(s)
- M Sebela
- Department of Biochemistry, Faculty of Science, Palacký University, Olomouc, Czech Republic.
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Morita T, Maughon BR, Bielawski CW, Grubbs RH. A Ring-Opening Metathesis Polymerization (ROMP) Approach to Carboxyl- and Amino-Terminated Telechelic Poly(butadiene)s. Macromolecules 2000. [DOI: 10.1021/ma000013x] [Citation(s) in RCA: 115] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Takeharu Morita
- Arnold and Mabel Beckman Laboratories of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125
| | - Bob R. Maughon
- Arnold and Mabel Beckman Laboratories of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125
| | - Christopher W. Bielawski
- Arnold and Mabel Beckman Laboratories of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125
| | - Robert H. Grubbs
- Arnold and Mabel Beckman Laboratories of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125
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Sebela M, Brauner F, Radová A, Jacobsen S, Havlis J, Galuszka P, Pec P. Characterisation of a homogeneous plant aminoaldehyde dehydrogenase. BIOCHIMICA ET BIOPHYSICA ACTA 2000; 1480:329-41. [PMID: 11004571 DOI: 10.1016/s0167-4838(00)00086-8] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
According to our knowledge, this is the first purification method developed, enabling isolation of a homogeneous aminoaldehyde dehydrogenase (AMADH) from etiolated pea seedlings. The procedure involved initial purification with precipitants followed by three low pressure chromatographic steps. Partially purified enzyme was further subjected to fast protein liquid chromatography on a Mono Q column and to affinity-interaction chromatography on 5'-AMP Sepharose. Purity of the final enzyme preparation was checked by sodium dodecyl sulfate-polyacrylamide gel electrophoresis and chromatofocusing. Pea AMADH exists as a tetramer of 230 kDa in the native state, a molecular mass of one subunit was determined as 57 kDa. The enzyme was found to be an acidic protein with pI 5.4. AMADH showed a broad substrate specificity utilising various aminoaldehydes (C3-C6) as substrates. The best substrate of pea AMADH was 3-aminopropionaldehyde, the enzyme also efficiently oxidised 4-aminobutyraldehyde and omega-guanidinoanalogues of the aminoaldehydes. Pea AMADH was inhibited by SH reagents, several elementary aldehydes and metal-binding agents. Although AMADH did not oxidise betaine aldehyde at all, the N-terminal amino acid sequence of the enzyme shows a high degree of homology with those of plant betaine aldehyde dehydrogenases (BADHs) of spinach, sugar beet and amaranth. Several conserved amino acids were found in comparison with BADH from cod liver of known crystal structure.
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Affiliation(s)
- M Sebela
- Department of Biochemistry, Faculty of Science, Palacky University, Olomouc, Czech Republic.
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