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Article

Opaque-2 is a transcriptional activator that recognizes a specific target site in 22-kD zein genes.

The Plant cell - 1 Jun 1992

Schmidt R J, Ketudat M, Aukerman M J, Hoschek G

Abstract excerpt

opaque-2 (o2) is a regulatory locus in maize that plays an essential role in controlling the expression of genes encoding the 22-kD zein proteins. Through DNase I footprinting and DNA binding analyses, we have identified the binding site for the O2 protein (O2) in the promoter of 22-kD zein genes. The sequence in the 22-kD zein gene promoter that is recognized by O2 is similar to the target site recognized by...

Topics

Base Sequence
Binding Sites
DNA
DNA-Binding Proteins
Molecular Sequence Data
Mutation
Plant Proteins
Promoter Regions, Genetic
Saccharomyces cerevisiae
Trans-Activators
Transcription Factors

Methodology Data sources Editorial policy Privacy About Contact Helena Bioinformatics

Transcription, Genetic

Zea mays

Zein

Source

Open in PubMed Open full text

Identifiers

PMID: 1392590
DOI: 10.1105/tpc.4.6.689
PMCID: PMC160165

Provenance

PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 29 Aug 2026. Prepared record publication-1392590-2026-08-29.1. Manifest publication-graph-cohort-2026-08-29.1.

Source receipt: PubMed via Helena Literature Corpus, retrieved 29 Aug 2026.

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Opaque-2 is a transcriptional activator that recognizes a specific target site in 22-kD zein genes.PMID 1392590Read ↗

OHP1: a maize basic domain/leucine zipper protein that interacts with opaque2.Semantic proximity Read ↗

An arginine to lysine substitution in the bZIP domain of an opaque-2 mutant in maize abolishes specific DNA binding.Semantic proximity Read ↗

Mutations of the 22- and 27-kD zein promoters affect transactivation by the Opaque-2 protein.Semantic proximity Read ↗

Genome-wide characterization of cis-acting DNA targets reveals the transcriptional regulatory framework of opaque2 in maize.Semantic proximity Read ↗

Phosphorylation of Opaque2 changes diurnally and impacts its DNA binding activity.Semantic proximity Read ↗

Wild-type opaque2 and defective opaque2 polypeptides form complexes in maize endosperm cells and bind the opaque2-zein target site.Semantic proximity Read ↗

Regulation of maize kernel development via divergent activation of α-zein genes by transcription factors O11, O2, and PBF1.Semantic proximity Read ↗

Molecular analysis of wild-type and mutant alleles at the Opaque-2 regulatory locus of maize reveals different mutations and types of O2 products.Semantic proximity Read ↗

opaque2 modifiers act post-transcriptionally and in a polar manner on gamma-zein gene expression in maize endosperm.Semantic proximity Read ↗

Characterization of novel proteins affected by the o2 mutation and expressed during maize endosperm development.Semantic proximity Read ↗

A 168 bp derivative of Suppressor-mutator/Enhancer is responsible for the maize o2-23 mutation.Semantic proximity Read ↗

Compositional and transcriptional analyses of reduced zein kernels derived from the opaque2 mutation and RNAi suppression.Semantic proximity Read ↗

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