An evolutionarily conserved protein binding sequence upstream of a plant light-regulated gene.
- 1 October 1988
- journal article
- research article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences
- Vol. 85 (19) , 7089-7093
- https://doi.org/10.1073/pnas.85.19.7089
Abstract
A protein factor, identified in nuclear extracts obtained from tomato (Lycopersicon esculentum, Solanaceae) and Arabidopsis thaliana (Brassicaceae) seedlings, specifically binds upstream sequences from the plant light-regulated gene family encoding the small subunit of ribulose 1,5-bisphosphate carboxylase/oxygenase (RBCS). RBCS upstream sequences from tomato, pea (Pisum sativum, Leguminosae), and Arabidopsis are recognized by the factor. The factor recognition occurs via a short conserved sequence (G box) whose consensus sequence is 5''-TCTTACACGTGGCAYY-3 (where Y is pyrimidine). This sequence is distinct from the GT motif described previously in RBCS promoters. Two other conserved sequences, showing a lesser degree of evolutionary conservation, are found upstream of the G box but do not bind to the G box binding factor (GBF). Twelve nucleotides within the G box are sufficient for the formation of a stable DNA-GBF complex. GBF is found in both light-grown and dark-adapted tomato leaf extracts, but it is present in greatly reduced amounts in root extracts.This publication has 29 references indexed in Scilit:
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