Biomedical subjects

Shaomin Wang

Publications and source records attributed to Shaomin Wang.

4 recordsLinked to original sources

PubMed2006

OsEIL1, a rice homolog of the Arabidopsis EIN3 regulates the ethylene response as a positive component.

The plant gaseous hormone ethylene regulates many aspects of plant growth, development and responses to the environment. ETHYLENE INSENSITIVE3 (EIN3) is a transcription factor involved in the ethylene signal transduction pathway in Arabidopsis. To gain a better understanding of the ethylene signal transduction pathway in rice, six EIN3-like genes (designated OsEIL1-6) were identified. OsEIL1, which showed highest similarity with EIN3, was isolated and functionally characterized. Ectopic expression of OsEIL1 in Arabidopsis can partially complement the ein3-1 mutant. The transgenic rice plants with overexpression of OsEIL1 exhibit short root, coiled primary root and slightly short shoot phenotype and elevated response to exogenous ethylene. OsEBP89, an ethylene responsive element binding protein (EREBP) and OsACO1, an ACC (1-aminocyclopropane-1-carboxylic acid) oxidase gene were enhanced in the OsEIL1 overexpressing transgenic plants. These results indicate that OsEIL1 is involved in ethylene signal transduction pathway and acts as a positive regulator of ethylene response in rice.

Amino Acid Oxidoreductases↗

PubMed2005

A novel short-root gene encodes a glucosamine-6-phosphate acetyltransferase required for maintaining normal root cell shape in rice.

Glycosylation is a posttranslational modification occurring in many secreted and membrane-associated proteins in eukaryotes. It plays important roles in both physiological and pathological processes. Most of these protein modifications depend on UDP-N-acetylglucosamine. In this study, a T-DNA insertional rice (Oryza sativa) mutant exhibiting a temperature-sensitive defect in root elongation was isolated. Genetic and molecular analysis indicated that the mutated phenotype was caused by loss of function of a gene encoding a glucosamine-6-P acetyltransferase (designated OsGNA1), which is involved in de novo UDP-N-acetylglucosamine biosynthesis. The aberrant root morphology of the gna1 mutant includes shortening of roots, disruption of microtubules, and shrinkage of cells in the root elongation zone. Our observations support the idea that protein glycosylation plays a key role in cell metabolism, microtubule stabilization, and cell shape in rice roots.

Acetyltransferases↗

PubMed2004

Mode properties produced by a corner-cube cavity.

The laser mode properties of a corner-cube resonator, in which the corner cube is the key element and a flat mirror is used as the output mirror, are analyzed by a numerical simulating method. Examples of numerical calculations are given to illustrate mode propagation through an optical system. The simulated results agree with the experimental ones.

Journal Article↗

PubMed2003

Stereoselective synthesis of 2-amino-2-deoxysugars: N-alkyl-D-allosamines.

Stereoselective synthesis of N-alkyl-D-allosamines, designed for the preparation of N-alkyl derivatives of allosamidin (a chitinase inhibitor), is achieved by a 'carbonyl group transfer' reaction followed by stereoselective reduction and this method represents the first example of N-alkyl-D-allosamines synthesized from a 2-oxosugar.

Acetylglucosamine↗