TAPX thylakoidal ascorbate peroxidase [Arabidopsis thaliana (thale cress)] - Gene

Summary

Official Symbol: TAPX
Official Full Name: thylakoidal ascorbate peroxidase
Primary source: TAIR:AT1G77490
Locus tag: AT1G77490
See related: Araport:AT1G77490
Gene type: protein coding
RefSeq status: REVIEWED
Organism: Arabidopsis thaliana (ecotype: Columbia)
Lineage: Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta; Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae; rosids; malvids; Brassicales; Brassicaceae; Camelineae; Arabidopsis
Also known as: T5M16.8; T5M16_8; thylakoidal ascorbate peroxidase; THYLAKOIDAL ASCORBATE PEROXIDASE
Summary: Encodes a chloroplastic thylakoid ascorbate peroxidase tAPX. Ascorbate peroxidases are enzymes that scavenge hydrogen peroxide in plant cells. Eight types of APX have been described for Arabidopsis: three cytosolic (APX1, APX2, APX6), two chloroplastic types (stromal sAPX, thylakoid tAPX), and three microsomal (APX3, APX4, APX5) isoforms.
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Chromosome 1 - NC_003070.9 Genomic Context describing neighboring genes

Go to nucleotide: Graphics FASTA GenBank

The lack of a chloroplastic hydrogen peroxide removal enzyme triggers a specific signal in cells that results in enhanced tolerance to heat stress.
Title: Double mutants deficient in cytosolic and thylakoid ascorbate peroxidase reveal a complex mode of interaction between reactive oxygen species, plant development, and response to abiotic stresses.

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NM_001334784.1

NM_106398.3

Function	Evidence Code	Pubs
enables L-ascorbate peroxidase activity	IEA Inferred from Electronic Annotation more info
enables heme binding	IEA Inferred from Electronic Annotation more info

Process	Evidence Code	Pubs
involved_in cellular response to oxidative stress	IEA Inferred from Electronic Annotation more info
acts_upstream_of_or_within chloroplast-nucleus signaling pathway	IMP Inferred from Mutant Phenotype more info	PubMed
acts_upstream_of_or_within cold acclimation	IMP Inferred from Mutant Phenotype more info	PubMed
acts_upstream_of_or_within hydrogen peroxide mediated signaling pathway	IMP Inferred from Mutant Phenotype more info	PubMed

Component	Evidence Code	Pubs
located_in chloroplast	HDA more info	PubMed
located_in chloroplast	ISM Inferred from Sequence Model more info
located_in chloroplast thylakoid	HDA more info	PubMed
located_in chloroplast thylakoid membrane	HDA more info	PubMed
located_in mitochondrion	HDA more info	PubMed
located_in thylakoid	HDA more info	PubMed

NP_177873.1

thylakoidal ascorbate peroxidase (TAPX); FUNCTIONS IN: L-ascorbate peroxidase activity; INVOLVED IN: oxidation reduction, response to oxidative stress; LOCATED IN: thylakoid, chloroplast thylakoid membrane, chloroplast; EXPRESSED IN: 21 plant structures; EXPRESSED DURING: 13 growth stages; CONTAINS InterPro DOMAIN/s: Haem peroxidase (InterPro:IPR010255), Plant ascorbate peroxidase (InterPro:IPR002207), Peroxidases heam-ligand binding site (InterPro:IPR019793), Haem peroxidase, plant/fungal/bacterial (InterPro:IPR002016); BEST Arabidopsis thaliana protein match is: stromal ascorbate peroxidase (TAIR:AT4G08390.2); Has 7809 Blast hits to 7730 proteins in 1256 species: Archae - 55; Bacteria - 2313; Metazoa - 5; Fungi - 620; Plants - 3345; Viruses - 0; Other Eukaryotes - 1471 (source: NCBI BLink).

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