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https://hdl.handle.net/2440/13557
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dc.contributor.author | Bewley, J. | - |
dc.contributor.author | Burton, R. | - |
dc.contributor.author | Morohashi, Y. | - |
dc.contributor.author | Fincher, G. | - |
dc.date.issued | 1997 | - |
dc.identifier.citation | Planta: an international journal of plant biology, 1997; 203(4):454-459 | - |
dc.identifier.issn | 0032-0935 | - |
dc.identifier.issn | 1432-2048 | - |
dc.identifier.uri | http://hdl.handle.net/2440/13557 | - |
dc.description.abstract | Mannose-containing polysaccharides are widely distributed in cell walls of higher plants. During endosperm mobilization in germinated tomato seeds (1-->4)-beta-mannan endohydrolases (EC 3.2.1.78) participate in the enzymic depolymerization of these cell wall polysaccharides. A cDNA encoding a (1-->4)-beta-mannanase from the endosperm of germinated tomato (Lycopersicon esculentum Mill.) seeds has been isolated and characterized. The amino acid sequence deduced from the 5'-region of the cDNA exactly matches the sequence of the 65 NH2-terminal amino acids determined directly from the purified enzyme. The mature enzyme consists of 346 amino acid residues, it has a calculated M(r) of 38,950 and an isoelectric point of 5.3. Overall, the enzyme exhibits only 28-30% sequence identity with fungal (1-->4)-beta-mannanases, but more highly conserved regions, which may represent catalytic and substrate-binding domains, can be identified. Based on classification of the tomato (1-->4)-beta-mannanase as a member of the family 5 group of glycosyl hydrolases, Glu-148 and Glu-265 would be expected to be the catalytic acid and the catalytic nucleophile, respectively. Southern hybridization analyses indicate that the enzyme is derived from a family of about four genes. Expression of the genes, as determined by the presence of mRNA transcripts in Northern hybridization analyses, occurs in the endosperm of germinated seeds; no transcripts are detected in hypocotyls, cotyledons, roots or leaves. | - |
dc.description.statementofresponsibility | J. Derek Bewley, Rachel A. Burton, Yukio Morohashi, Geoffrey B. Fincher | - |
dc.language.iso | en | - |
dc.publisher | SPRINGER | - |
dc.rights | © Springer-Verlag 1997 | - |
dc.source.uri | http://dx.doi.org/10.1007/s004250050214 | - |
dc.subject | Cell wall | - |
dc.subject | endosperm mobilization | - |
dc.subject | gene expression patterns | - |
dc.subject | lycopersicon | - |
dc.subject | (1→4)-β-Mannan endohydrolase (primary structure) | - |
dc.subject | polysaccharide | - |
dc.title | Molecular cloning of a cDNA encoding a (1→4)-β-mannan endohydrolase from the seeds of germinated tomato (Lycopersicon esculentum) | - |
dc.title.alternative | Molecular cloning of a cDNA encoding a (1->4)-beta-mannan endohydrolase from the seeds of germinated tomato (Lycopersicon esculentum) | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1007/s004250050214 | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Burton, R. [0000-0002-0638-4709] | - |
Appears in Collections: | Agriculture, Food and Wine publications Aurora harvest 2 |
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