EC Number   |
General Information |
Reference |
|---|
   2.1.1.273 | evolution |
differences in scent emission between Antirrhinum majus and Antirrhinum linkianum may be traced back to single genes involved in discrete biosynthetic reactions such as benzoic acid methylation. Thus, natural variation of this complex trait may be the result of combinations of wild-type, and loss of function alleles in different genes involved in discrete VOCs biosynthesis. The presence of active transposable elements in the genus may account for rapid evolution and instability, raising the possibility of adaptation to local pollinators. Genetic analysis of scent emission spanning three generations following a cross of Antirrhinum majus and Antirrhinum linkianum. Both species differ in the production of four volatile organic compounds (VOCS): methyl benzoate, beta-ocimene, methylcinnamate, and acetophenone. These compounds display mendelian segregations typical for a single gene or two loci in the F2 population. Loss of function allele of benzoic acid carboxymethyl transferase (BAMT), a gene involved in methylbenzoate synthesis in higher plants. The null allele is the result of a genomic insertion in the promoter region that is likely mediated by an IDLE MITE transposable element |
-, 756825 |
| 2.1.1.273 | evolution |
the enzyme belongs to SABATH family, a class of O-methyltransferases and N-methyltransferases |
736189 |
| 2.1.1.273 | evolution |
the enzyme belongs to the SABATH family, phylogenetic analysis and tree, detailed overview. Twenty-eight Populus SABATH genes are divided into three classes with distinct divergences in their gene structure, expression responses to abiotic stressors and enzymatic properties of encoded proteins. Populus class I SABATH proteins convert indole-3-acetic acid (IAA) to methyl-IAA, class II SABATH proteins convert benzoic acid (BA) and salicylic acid (SA) to methyl-BA and methyl-SA, while class III SABATH proteins convert farnesoic acid (FA) to methyl-FA. For Populus class II SABATH proteins, both forward and reverse mutagenesis studies show that a single amino acid switch between PtSABATH4 and PtSABATH24 results in substrate switch. Of the Populus SABATH class II proteins, PtSABATH4 and 24 show the highest activity towards SA and BA, respectively |
757984 |
| 2.1.1.273 | malfunction |
AtBSMT1-overexpressing plants are not more susceptible than wild-type to either Plasmodiophora brassicae or Albugo candida. Transgenic Arabidopsis thaliana and Nicotiana tabacum plants overexpressing PbBSMT exhibit increased susceptibility to virulent Pseudomonas syringae pv. tomato DC3000 and virulent Pseudomonas syringae pv. tabaci, respectively. Gene-mediated resistance to DC3000/AvrRpt2 and tobacco mosaic virus (TMV) is also compromised in Arabidopsis thaliana and Nicotiana tabacum cv. Xanthi-nc plants overexpressing PbBSMT, respectively. Transient expression of PbBSMT or AtBSMT1 in lower leaves of Nicotiana tabacum Xanthi-nc results in systemic acquired resistance (SAR)-like enhanced resistance to TMV in the distal systemic leaves. The development of a PbBSMT-mediated SAR-like phenotype is also dependent on the MeSA esterase activity of NtSABP2 in the systemic leaves. Phenotypes, overview |
-, 757709 |
| 2.1.1.273 | malfunction |
basal salicylic acid (SA) levels in Arabidopsis thaliana plants that constitutively overexpress PbBSMT compared with those in Arabidopsis wild-type Col-0 are reduced approximately 80% versus only a 50% reduction in plants overexpressing AtBSMT1. PbBSMT-overexpressing plants are more susceptible to Plasmodiophora brassicae than wild-type plants, they also are partially compromised in nonhost resistance to Albugo candida. In contrast, AtBSMT1-overexpressing plants are not more susceptible than wild-type to either Plasmodiophora brassicae or Albugo candida. Furthermore, transgenic Arabidopsis thaliana and Nicotiana tabacum plants overexpressing PbBSMT exhibit increased susceptibility to virulent Pseudomonas syringae pv. tomato DC3000 and virulent Pseudomonas syringae pv. tabaci, respectively. Gene-mediated resistance to DC3000/AvrRpt2 and tobacco mosaic virus (TMV) is also compromised in Arabidopsis thaliana and Nicotiana tabacum cv. Xanthi-nc plants overexpressing PbBSMT, respectively. Transient expression of PbBSMT or AtBSMT1 in lower leaves of Nicotiana tabacum cv. Xanthi-nc results in systemic acquired resistance (SAR)-like enhanced resistance to TMV in the distal systemic leaves. The development of a PbBSMT-mediated SAR-like phenotype is also dependent on the MeSA esterase activity of NtSABP2 in the systemic leaves. Phenotypes, overview |
757709 |
| 2.1.1.273 | malfunction |
for Populus class II SABATH proteins, both forward and reverse mutagenesis studies show that a single amino acid switch between PtSABATH4 and PtSABATH24 results in substrate switch. Mutation of His157 of PtSABATH24 to a methionine residue also results in a switch from a preference for BA over SA in wild-type PtSABATH24 to a preference for SA over BA in the H157M mutant. The mutation M156H in PtSBATH4 (EC 2.1.1.274) results in a switch from a preference for salicylic acid (SA) over benzoic acid (BA) in wild-type PtSABATH4 to a preference for BA over SA in the M156H mutant |
757984 |
| 2.1.1.273 | malfunction |
recombinant BSMT enzyme expression in Arabidopsis thaliana under the control of a dexamethasone-inducible promoter leads to chlorosis and altered host susceptibility. Transcription of PbBSMT is associated with: (1) strong leaf phenotypes from anthocyanin accumulation and chlorosis followed by browning, (2) increased plant susceptibility after infection with Plasmodiophora brassicae that is manifested as more yellow leaves and reduced growth of upper plant parts, and (3) induced transgenic plants are not able to support large galls and had a brownish appearance of some clubs. Microarray data indicate that chlorophyll loss is accompanied by reduced transcription of genes involved in photosynthesis, while genes encoding glucose metabolism, mitochondrial functions and cell wall synthesis are upregulated. Phenotype overview |
757953 |
| 2.1.1.273 | metabolism |
expression patterns of Populus SABATH genes under normal growth conditions and abiotic stress, overview |
757984 |
| 2.1.1.273 | metabolism |
final enzyme in the biosynthesis of methyl benzoate |
726156 |
| 2.1.1.273 | metabolism |
the enzyme is involved in the secondary metabolic pathways leading to the formation of scent volatiles in Jasminum sambac flower, overview. Developmental pattern of emission of sent volatiles in Jasminum sambac flower on a time-course basis, and concentrations of the above benzenoids and terpenes in the flowers with respect to spatial and temporal regulation |
749017 |
