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Sivasankar S, Sheldrick B, Rothstein SJ. Expression of allene oxide synthase determines defense gene activation in tomato. Plant Physiol 2000; 122:1335-42. [PMID: 10759530 PMCID: PMC58969 DOI: 10.1104/pp.122.4.1335] [Citation(s) in RCA: 123] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/1999] [Accepted: 12/23/1999] [Indexed: 05/19/2023]
Abstract
Allene oxide synthase (AOS; hydroperoxide dehydratase; EC 4.2.1.92) catalyzes the first step in the biosynthesis of jasmonic acid from lipoxygenase-derived hydroperoxides of free fatty acids. Using the AOS cDNA from tomato (Lycopersicon esculentum), in which the role of jasmonic acid in wound-induced defense gene activation has been best described, we examined the kinetics of AOS induction in response to wounding and elicitors, in parallel with that of the wound-inducible PIN II (proteinase inhibitor II) gene. AOS was induced in leaves by wounding, systemin, 12-oxophytodienoic acid, and methyl jasmonate. The levels of AOS mRNA started declining by 4 h after induction, whereas the levels of PIN II mRNA continued to increase up to 20 h after induction. Salicylic acid inhibited AOS and PIN II expression, and the addition of 12-oxophytodienoic acid or methyl jasmonate did not prevent the inhibition of PIN II expression in the presence of salicylic acid. Ethylene induced the expression of AOS, but the presence of ethylene alone did not produce an optimal induction of PIN II. The addition of silver thiosulfate, an ethylene action inhibitor, prevented the wound-induced expression of both AOS and PIN II. Products of hydroperoxide lyase affected neither AOS nor PIN II, but induced expression of prosystemin. Based on these results, we propose an updated model for defense gene activation in tomato.
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Affiliation(s)
- S Sivasankar
- Department of Molecular Biology and Genetics, University of Guelph, Guelph, Ontario, Canada N1G 2W1.
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Agianian B, Perrakis A, Kanellopoulos PN, Sheldrick B, Hamodrakas SJ. p-Nitrophenyl α-D-Mannopyranoside Ethanol Solvate. Acta Crystallogr C 1997. [DOI: 10.1107/s0108270196015776] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Lamba D, Glover S, Mackie W, Rashid A, Sheldrick B, Pérez S. Insights into stereochemical features of sulphated carbohydrates: X-ray crystallographic and modelling investigations. Glycobiology 1994; 4:151-63. [PMID: 8054715 DOI: 10.1093/glycob/4.2.151] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
The three-dimensional structures of the 2-, 3-, 4- and 6-monosulphates of methyl alpha-D-galactopyranoside have been determined by X-ray crystallography; the first two as the sodium salt, the third as both the sodium and potassium salts, and the fourth as a potassium salt. These represent the principal sulphated monomers of the carrageenan polysaccharides. The results extend our knowledge of the stereochemical features, such as ring conformation, sulphate geometry, hydrogen bonding and cation co-ordination, which characterize sulphated monosaccharides. The stereochemical data have been used to derive a mean geometry of the O-sulphate group and a set of force constants for use in molecular mechanics calculations on sulphated monosaccharides. These may be used in an extrapolation of the populations of stable conformers of related oligo- and polysaccharides.
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Affiliation(s)
- D Lamba
- Istituto di Strutturistica Chimica Giordano Giacomello, Area della Ricerca di Roma, CNR, Italy
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Eliopoulos E, Sheldrick B, Hamodrakas S. 4,5-Dimethoxy-2-[3-(1,4-oxazinan-4-yl)-3-oxopropyl]-N-(2-pyridyl)benzenesulfonamide methanol solvate. Acta Crystallogr C 1991. [DOI: 10.1107/s0108270190010174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Ghosh M, Basak AK, Mazumdar SK, Sheldrick B. Structure and conformation of the 1:1 molecular complex sulfaproxyline–caffeine. Acta Crystallogr C 1991. [DOI: 10.1107/s0108270190006576] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Lamba D, Segre AL, Glover S, Mackie W, Sheldrick B, Pérez S. Molecular structure of 3-O-(3,6-anhydro-alpha-D-galactopyranosyl)-beta-D-galactopyranose (neocarrabiose) in the solid state and in solution: an investigation by X-ray crystallography, n.m.r. spectroscopy, and molecular mechanics calculations. Carbohydr Res 1990; 208:215-30. [PMID: 2085809 DOI: 10.1016/0008-6215(90)80101-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The crystal structure of neocarrabiose monohydrate, 3-O-(3,6-anhydro-alpha-D-galactopyranosyl)-beta-D-galactopyranose (C12H20O10.H2O) belongs to the monoclinic space group P2(1), and has a unit cell of dimensions a = 6.351(1), b = 7.675(2), c = 15.096(8) A, and beta = 91.11(1) degree. The reducing unit is in the 4C1 conformation, the non-reducing residue is 1C4, with the 3,6-anhydro bridge in an E conformation, and HO-6 is in a gauche-trans conformation. The orientation about the (1----3) linkage is defined by phi = 94.5 degrees and psi = 141.9 degrees. There is an intramolecular hydrogen bond (O-5'...O-2 = 2.777A). The conformation of the pyranose rings in solution, derived from 3JH.H values, were not significantly different from those in the crystal, but the 3,6-anhydro bridge assumed a half-chair conformation. All these features have been rationalised through molecular modelling and computation of potential energy surfaces.
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Affiliation(s)
- D Lamba
- Istituto di Strutturistica Chimica Girodano Giacomello, Roma, Italy
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Sheldrick B, Mackie W, Akrigg D. The structures of barium D-galactarate monohydrate and calcium D-galactarate tetrahydrate. Acta Crystallogr C 1989. [DOI: 10.1107/s0108270188011746] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Johnson O, Jones DW, Hazell RG, Sheldrick B. Structure of 1,4-dihydroxy-2-(1-hydroxy-2,3:4,5-di-O-isopropylidene-D-arabinityl)-9,10-anthraquinone. Acta Crystallogr C 1989. [DOI: 10.1107/s0108270188010509] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Sheldrick B, Mackie W, Akrigg D. Structure of 1,2:5,6-di-O-isopropylidene-α-D-gulofuranose. Acta Crystallogr C 1988. [DOI: 10.1107/s0108270187011971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Ghosh M, Basak AK, Mazumdar SK, Sheldrick B. Crystal and molecular structure of N4-acetyl- N1-( p-nitrophenyl)sulphanilamide. Acta Crystallogr A 1987. [DOI: 10.1107/s0108767387083922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Ghosh M, Basak AK, Roy PN, Mazumdar SK, Sheldrick B. Structure of 4-phthalimido-N-(1,3-thiazol-2-yl)benzenesulfonamide. Acta Crystallogr C 1987. [DOI: 10.1107/s0108270187094320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
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Sheldrick B, Akrigg D, Page MI, Cox G. Structures of carbocyclic analogues of penicillin. 2. N-(3,4-Dihydroxy-7-oxobicyclo[3.2.0]hept-6-yl)succinimide. Acta Crystallogr C 1987. [DOI: 10.1107/s0108270187094897] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Sheldrick B, Akrigg D, Page MI, Cox G. Structures of carbocyclic analogues of penicillin. 3. N-(Bicyclo[3.2.0]hept-2-ene-6-spiro-2'-dioxolane-7-yl)phthalimide. Acta Crystallogr C 1987. [DOI: 10.1107/s0108270187094885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Sheldrick B, Akrigg D, Page MI, Agathocleous D. Structure of a carbocyclic oxapenam analogue. Acta Crystallogr C 1985. [DOI: 10.1107/s010827018500957x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Sheldrick B, Akrigg D, Page MI, Agathocleous D. Structure of a carbocyclic analogue of penicillin. Acta Crystallogr C 1985. [DOI: 10.1107/s0108270185006114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Sheldrick B, Mackie W, Akrigg D. X-ray structure determination of o-β- D-mannopyranosyl(1→4)- o-β- D-mannopyranosyl(1→4)- o-α- D-mannopyranose·3H 2O (mannotriose). Acta Crystallogr A 1984. [DOI: 10.1107/s010876738409200x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Sheldrick B, Akrigg D, Page MI, Agathocleous D. N-{(1R*,5S*,7R*)-6-Oxobicyclo[3.2.0]hept-2-en-7-yl}phthalimide, C15H11NO3. Acta Crystallogr C 1984. [DOI: 10.1107/s0108270184007393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Eliopoulos E, Sheldrick B, Hamodrakas S. Ethyl 3-[4,5-dimethoxy-2-(3-methyl-2-pyridylsulphamoyl)phenyl]propionate, C19H24N2O6S. Acta Crystallogr C 1983. [DOI: 10.1107/s0108270183009786] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Eliopoulos E, Sheldrick B, Hamodrakas S. Ethyl 3-[4,5-dimethoxy-2-(4-methyl-2-pyridylsulphamoyl)phenyl]propionate, C19H24O6S. Acta Crystallogr C 1983. [DOI: 10.1107/s0108270183006150] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Graham AJ, Akrigg D, Sheldrick B. (η-Allyl)bromodicarbonyl(N,N'-di-tert-butylethanediimine)molybdenum(II), MoBr(C3H5)(C10H20N2)(CO)2. Acta Crystallogr C 1983. [DOI: 10.1107/s0108270183004084] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Geddes AJ, Sheldrick B, Akrigg D. (−)-2( R)-[2,3-Dihydro-2( R)-isopropyl-4-oxo-4 H-1-benzopyran-6-yl]- N-[1( R)-phenylethyl]propionamide: a chromanone amide with three chiral centres. Acta Crystallogr Sect B 1980. [DOI: 10.1107/s0567740880011284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Sheldrick B. The crystal structure of methyl β- D-galactopyranoside: erratum. Acta Crystallogr Sect B 1978. [DOI: 10.1107/s0567740878012455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Hamodrakas S, Akrigg D, Sheldrick B, Camoutsis C. Ethyl 3-[4,5-dimethoxy-2-(5-methyl-2-pyridylsulfamoyl)phenyl]propionate. Acta Crystallogr B Struct Sci 1978. [DOI: 10.1107/s056774087801119x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Khalil S, Sheldrick B, Soares A, Sykes A. Crystal structure of the barium salt of the binuclear tungsten (V) complex di-μ-oxo-μ(N,N′)ethylene-diaminetetra-acetato-bis[oxotungstate(V)], Ba [W204-(C10H12O8N2]3.5H2O. Inorganica Chim Acta 1977. [DOI: 10.1016/s0020-1693(00)95655-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Sheldrick B. Tetrapotassium di-μ-oxo-bis{μ-hydroxo-μ-oxo-μ-N,N'-ethylenediaminetetraacetate-bis[molybdate(III,IV)]}.16.4H2O. ACTA ACUST UNITED AC 1976. [DOI: 10.1107/s0567740876009114] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Abstract
Abstract
X-ray crystallographic studies have been made on the anti-asthmatic drug disodium cromoglycate. Interesting features of the structure are the non-coplanarity of the chromone (benzopyrone) rings, an apparent disorder in the position of one of the sodium atoms, and the occurrence of water-filled ‘channels’ in the crystal lattice.
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