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Article

SPA1: a new genetic locus involved in phytochrome A-specific signal transduction.

The Plant cell - 1 Jan 1998

Hoecker U, Xu Y, Quail P H

Abstract excerpt

To identify mutants potentially defective in signaling intermediates specific to phytochrome A (phyA), we screened for extragenic mutations that suppress the morphological phenotype exhibited by a weak phyA mutant (phyA-105) of Arabidopsis. A new recessive mutant, designated spa1 (for suppressor of phyA-105), was isolated and mapped to the bottom of chromosome 2. spa1 phyA-105 double mutants exhibit restoration...

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Identifiers

PMID: 9477570
DOI: 10.1105/tpc.10.1.19
PMCID: PMC143933

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PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 6 Sept 2026. Manifest publication-graph-cohort-2026-09-06.1.

Source receipt: pubmed, retrieved 6 Sept 2026.

Related research

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Click a neighbor to travelStep 1 · 12 closest

SPA1: a new genetic locus involved in phytochrome A-specific signal transduction.PMID 9477570Read ↗

The SPA1-like proteins SPA3 and SPA4 repress photomorphogenesis in the light.Semantic proximity Read ↗

SPA1, a WD-repeat protein specific to phytochrome A signal transduction.Semantic proximity Read ↗

SPA1, a component of phytochrome A signal transduction, regulates the light signaling current.Semantic proximity Read ↗

The negatively acting factors EID1 and SPA1 have distinct functions in phytochrome A-specific light signaling.Semantic proximity Read ↗

The Arabidopsis SPA1 gene is required for circadian clock function and photoperiodic flowering.Semantic proximity Read ↗

Arabidopsis phytochrome B promotes SPA1 nuclear accumulation to repress photomorphogenesis under far-red light.Semantic proximity Read ↗

A novel high-throughput in vivo molecular screen for shade avoidance mutants identifies a novel phyA mutation.Semantic proximity Read ↗

The phytochrome A-specific signaling intermediate SPA1 interacts directly with COP1, a constitutive repressor of light signaling in Arabidopsis.Semantic proximity Read ↗

Characterization of a strong dominant phytochrome A mutation unique to phytochrome A signal propagation.Semantic proximity Read ↗

Missense mutation in the PAS2 domain of phytochrome A impairs subnuclear localization and a subset of responses.Semantic proximity Read ↗

The SPA quartet: a family of WD-repeat proteins with a central role in suppression of photomorphogenesis in arabidopsis.Semantic proximity Read ↗

A dominant mutation in the pea PHYA gene confers enhanced responses to light and impairs the light-dependent degradation of phytochrome A.Semantic proximity Read ↗

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