Characterization of an endo-beta-1,4-glucanase gene induced by auxin in elongating pea epicotyls.
AUTOR(ES)
Wu, S C
RESUMO
A gene (EGL1) encoding an endo-beta-1,4-D-glucanase (EGase, EC 3.2.1.4) of pea (Pisum sativum) has been cloned and characterized. EGL1 encodes a 486-amino acid polypeptide, including a 24-mer putative signal peptide. The mature protein has a calculated molecular mass of 51.3 kD and an isoelectric point of 9.1. This pea EGase shares significant similarity with EGases from other plant species, but it appears to be distinct from the EGases associated with abscission and fruit ripening. Although EGL1 transcripts are detected in all parts of pea plants, they are relatively abundant in flowers and young pods undergoing rapid growth and most abundant in elongating epicotyls of etiolated seedlings. When epicotyl segments (6 mm long, 4 mm from the apical hook) are incubated in a 5 microM solution of the synthetic auxin analog 2,4-dichlorophenoxyacetic acid, the concentration of EGL1 mRNA increases about 10-fold when the segments elongate most rapidly.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=157705Documentos Relacionados
- Endo-beta-1,4-glucanase gene of Bacillus subtilis DLG.
- Extracellular endo-beta-1,4-glucanase in Cellvibrio vulgaris.
- Structure of a Bacillus subtilis endo-beta-1,4-glucanase gene.
- Immunodetection and characterization of tomato endo-beta-1,4-glucanase Cel1 protein in flower abscission zones.
- Molecular cloning, expression, and characterization of endo-beta-1,4-glucanase genes from Bacillus polymyxa and Bacillus circulans.
