Abstract:
:Plant S-adenosyl-L-methionine-dependent methyltransferases (SAM-Mtases) are the key enzymes in phenylpropanoid, flavonoid and many other metabolic pathways of biotechnological importance. Here we compiled the amino acid sequences of 56 SAM-Mtases from different plants and performed a computer analysis for the conserved sequence motifs that could possibly act as SAM-binding domains. To date, genes or cDNAs encoding at least ten distinct groups of SAM-Mtases that utilize SAM and a variety of substrates have been reported from higher plants. Three amino acid sequence motifs are conserved in most of these SAM-Mtases. In addition, many conserved domains have been discovered in each group of O-methyltransferases (OMTs) that methylate specific substrates and may act as sites for substrate specificity in each enzyme. Finally, a diagrammatic representation of the relationship between different OMTs is presented. These SAM-Mtase sequence signatures will be useful in the identification of SAM-Mtase motifs in the hitherto unidentified proteins as well as for designing primers in the isolation of new SAM-Mtases from plants.
journal_name
Plant Mol Bioljournal_title
Plant molecular biologyauthors
Joshi CP,Chiang VLdoi
10.1023/a:1006035210889subject
Has Abstractpub_date
1998-07-01 00:00:00pages
663-74issue
4eissn
0167-4412issn
1573-5028journal_volume
37pub_type
杂志文章abstract::Using RNA from developing cotyledons and leaves of bean two products were synthesizedin vitro, with Mr 31000 and 31500 which are antigenically related to the subunit of phytoferritin (Mr 26500). The relative abundance of the two products is dependent on the type of tissue from which the RNA was derived. Evidence is pr...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF01578592
更新日期:1983-11-01 00:00:00
abstract::We have previously shown that mRNA and protein encoded by the Pvlea-18 gene from Phaseolus vulgaris L., a member of a new family of late embryogenesis-abundant (LEA) proteins, accumulate in dark-grown bean seedlings not only in response to water deficit but also during optimal irrigation. In this work, we studied Pvle...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1023/a:1010607223533
更新日期:2001-03-01 00:00:00
abstract::A combined chemical, biochemical and molecular study was conducted to understand the differential accumulation of volatile sesquiterpenes in melon fruits. Sesquiterpenes were present mainly in the rinds of climacteric varieties, and a great diversity in their composition was found among varieties. Sesquiterpenes were ...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-008-9296-6
更新日期:2008-04-01 00:00:00
abstract::Telomeres, the complex nucleoprotein structures at the ends of linear eukaryotic chromosomes, along with telomerase, the enzyme that synthesizes telomeric DNA, are required to maintain a stable genome. Together, the enzyme and substrate perform this essential service by protecting chromosomes from exonucleolytic degra...
journal_title:Plant molecular biology
pub_type: 杂志文章,评审
doi:10.1023/a:1014091032750
更新日期:2002-03-01 00:00:00
abstract::We have sequenced a plastid gene cluster from the unicellular red alga Cyanidium caldarium which is located downstream from the psbA gene and contains, in the following order, genes for a beta-allophycocyanin-like protein (apcB'), a putative 9.5 kDa allophycocyanin linker protein (apcL9.5) and a putative 29 kDa phycoc...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00014494
更新日期:1992-10-01 00:00:00
abstract::Elicitins are 10 kDa holoproteins secreted by Phytophthora fungi, that elicit an incompatible hypersensitive reaction, leading to resistance against fungal and bacterial plant pathogens. Comparison of primary sequences of alpha-elicitins and beta-elicitins indicated several potential necrotic activity-determining resi...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00019323
更新日期:1995-02-01 00:00:00
abstract::The suppression of plant defence reactions plays a crucial role in causing plant diseases. In this report, we show that inducible plant defences are repressed during the development of Cercospora leaf spot disease. In the early phase of infection of sugar beet (Beta vulgaris L.) leaves with the phytopathogenic fungus ...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-004-2141-7
更新日期:2004-08-01 00:00:00
abstract::We isolated and characterized different classes of transposable DNA elements in oil palm (Elaeis guineensis) plants grown from seed, and plants regenerated from tissue culture that show mantling, an abnormality leading to flower abortion. Using PCR assays, reverse transcriptase fragments belonging to LINE-like and gyp...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1023/a:1023942309092
更新日期:2003-05-01 00:00:00
abstract::Plants, algae, cyanobacteria and many other bacteria synthesize the tetrapyrrole precursor, delta-aminolevulinic acid (ALA), from glutamate by means of a tRNAGlu-mediated pathway. The enzyme glutamyl-tRNA reductase (GTR) catalyzes the first committed step in this pathway, which is the reduction of tRNA-bound glutamate...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-005-6803-x
更新日期:2005-07-01 00:00:00
abstract::Plants that utilize the highly efficient C4 photosynthetic pathway possess two types of specialized leaf cells, the mesophyll and bundle sheath. In mature leaves of amaranth, a dicotyledonous C4 plant, ribulose 1,5-bisphosphate carboxylase (Rubisco) is localized specifically to the chloroplasts of bundle sheath cells,...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00015971
更新日期:1993-06-01 00:00:00
abstract::Pathogenesis related-10 (PR-10) proteins are present as multigene family in most of the higher plants. The role of PR-10 proteins in plant is poorly understood. A sequence analysis revealed that a large number of PR-10 proteins possess conserved motifs found in aldo/keto reductases (AKRs) of yeast and fungi. We took t...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-015-0405-z
更新日期:2016-01-01 00:00:00
abstract::A vector has been designed that contains a truncated CaMV (cauliflower mosaic virus) 35S promoter fused to a receptor gene encoding beta-glucuronidase (GUS), placed adjacent to the left border sequence of an Agrobacterium vector. In potato plants transformed with this vector, different patterns of transcription were d...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00020557
更新日期:1991-02-01 00:00:00
abstract::Osmium tetroxide (OsO4) reacts with the thymine residues of double-stranded DNA, but thymines that are unpaired or under torsional stress are hyperreactive. Although OsO4 hyperreactivity has been primarily utilized to identify Z-DNA structures in supercoiled plasmids, OsO4 will also identify other torsional perturbati...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00028983
更新日期:1993-09-01 00:00:00
abstract::Nicotiana tabacum Togt encodes a scopoletin glucosyltransferase (UDPglucose:scopoletin O -beta-D-glucosyltrans- ferase, EC 2.4.1.128) known to act in vitro on many different substrates including the 6-methoxy-7-hydroxy- coumarin scopoletin. This phenolic compound accumulates in vast amounts, essentially in its glucosy...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1023/B:PLAN.0000028775.58537.fe
更新日期:2004-01-01 00:00:00
abstract:KEY MESSAGE:Degradation of nitrogen-rich purines is tightly and oppositely regulated under drought and low nitrogen supply in bread wheat. Allantoin is a key target metabolite for improving nitrogen homeostasis under stress. The metabolite allantoin is an intermediate of the catabolism of purines (components of nucleot...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-019-00831-z
更新日期:2019-03-01 00:00:00
abstract::Salicylic acid (SA) is known to play an important role in the interaction between plant and micro-organisms, both symbiotic and pathogen. In particular, high levels of SA block nodule formation and mycorrhizal colonization in plants. A mutant of Lotus japonicus, named Ljsym4-2, was characterized as unable to establish...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-009-9585-8
更新日期:2010-03-01 00:00:00
abstract::A gene encoding the large subunit of ribulose-1,5-bisphosphate carboxylase (Rubisco) was identified on a circular 73 kb DNA from the colourless euglenoid flagellate Astasia longa. The rbcL gene of Astasia extends over 3968 bp. It is a split gene interrupted by seven introns as compared to nine intervening sequences in...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00016515
更新日期:1990-05-01 00:00:00
abstract::The amounts of a 1.9 kb mitochondrial plasmid relative to sequences in another mitochondrial DNA replicon and also to nuclear ribosomal DNA sequences have been compared in maize leaves and anthers. Similar comparisons have been made between plants with the same nuclear genotype but containing normal, S, or T cytoplasm...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF02418241
更新日期:1985-07-01 00:00:00
abstract::Wood is the most abundant biological resource on earth and it is also an important raw material for a major global industry with rapidly increasing demand. The genus Eucalyptus includes the most widely used tree species for industrial plantation, mainly for making pulp and paper. With the aim of identifying major gene...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-004-0621-4
更新日期:2004-05-01 00:00:00
abstract::The pea lectin (Psl) gene encodes an abundant seed protein. Its seed-specific expression pattern is conserved in transgenic tobacco plants. Progressive 5' promoter deletions resulted in a gradual decrease of transcriptional activity in tobacco seed. A fragment of 115 bp still conferred seed-specific expression albeit ...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00019103
更新日期:1996-11-01 00:00:00
abstract::The immunoscreening method was used to isolate cDNAs of 1323 bp (ClOCT1) and 1433 bp (ClOCT2) encoding two ornithine carbamoyltransferases (OCT, EC 2.1.3.3) from the cDNA expression library of Canavalia lineata leaves constructed in a lambdaZAP Express vector. ClOCT1 and ClOCT2 encode 359 and 369 amino acids, respecti...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1023/a:1011632927541
更新日期:2001-08-01 00:00:00
abstract::Repair of the ubiquitous mutagenic lesion 7,8-dihydro-8-oxoguanine (8-oxoG) is initiated in eukaryotes by DNA glycosylases/lyases, such as yeast Ogg1, that do not share significant sequence identity with their prokaryotic counterparts, typified by Escherichia coli MutM (Fpg) protein. The unexpected presence of a funct...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1023/a:1013644026132
更新日期:2001-12-01 00:00:00
abstract::Brachypodium distachyon (Brachypodium) has been recently recognized as an emerging model system for both comparative and functional genomics in grass species. In this study, 55,221 repeat masked Brachypodium BAC end sequences (BES) were used for comparative analysis against the 12 rice pseudomolecules. The analysis re...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-009-9456-3
更新日期:2009-05-01 00:00:00
abstract::The expression of the mat-r locus (mat-r-nad1e-nad5III) was studied in wheat mitochondria. Transcription initiation sites were mapped by S1 protection, primer extension and capping experiments. Two different transcription initiation sites were found. One, non-canonical promoter of low expression level generates a tran...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1023/a:1006296422485
更新日期:1999-08-01 00:00:00
abstract::Approximately two-thirds of the 55 to 60 plastid ribosomal proteins are encoded in the nucleus. Since the protein products of each of these genes are needed in equal amounts for ribosome assembly, their expression may be coordinately regulated by common mechanisms. To begin to understand how the expression of these ge...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00019207
更新日期:1992-03-01 00:00:00
abstract::The barley cysteine proteinase B (EPB) is the main protease responsible for the degradation of endosperm storage proteins providing nitrogenous nutrients to support the growth of young seedlings. The expression of this enzyme is induced in the germinating seeds by the phytohormone, gibberellin, and suppressed by anoth...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00021787
更新日期:1996-05-01 00:00:00
abstract::Pyruvate orthophosphate dikinase (PPDK) is a critical enzyme for C(4) photosynthesis, providing the primary acceptor for fixation of bicarbonate in mesophyll cells. Although first isolated in C(4) plants, it is also present in C(3) species. We report that the single gene encoding PPDK in Arabidopsis thaliana possesses...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-006-9023-0
更新日期:2006-10-01 00:00:00
abstract::The root endophytic fungus Piriformospora indica enhances plant adaptation to environmental stress based on general and non-specific plant species mechanisms. In the present study, we integrated the ionomics, metabolomics, and transcriptomics data to identify the genes and metabolic regulatory networks conferring salt...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-016-0461-z
更新日期:2016-04-01 00:00:00
abstract::We have identified two single-copy genes from the model legume. Medicago truncatula (MtENOD16 and 20) whose expression can be correlated with early stages of root nodulation and whose predicted coding sequences are partially homologous to both pea/vetch ENOD5 and soybean N315/ENOD55. Database searching and sequence al...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1023/a:1005916821224
更新日期:1998-03-01 00:00:00
abstract::Transcription of plastid genes in higher plants is driven by two RNA polymerases. One is encoded in the chloroplast, the other is encoded in the nucleus. RNA synthesis in ribosome-deficient plastids is performed exclusively by the nuclear-encoded enzyme. In vitro capping was used to identify the transcriptional start ...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1023/a:1005924502336
更新日期:1998-02-01 00:00:00