Reviewed, UniProtKB/Swiss-Prot P81833 (APX4_SPIOL)

Names and origin

Protein names	Recommended name:     Putative L-ascorbate peroxidase, chloroplastic     EC=1.11.1.11 Alternative name(s):     Thylakoid lumenal 29 kDa protein       Short name=TL29     P29
Organism	Spinacia oleracea (Spinach)
Taxonomic identifier	3562 [NCBI]
Taxonomic lineage	Eukaryota › Viridiplantae › Streptophyta › Embryophyta › Tracheophyta › Spermatophyta › Magnoliophyta › eudicotyledons › core eudicotyledons › Caryophyllales › Amaranthaceae › Spinacia

Protein attributes

Sequence length	30 AA.
Sequence status	Fragment.
Sequence processing	The displayed sequence is not processed.
Protein existence	Evidence at protein level.

General annotation (Comments)

Function	Plays a key role in hydrogen peroxide removal By similarity.
Catalytic activity	L-ascorbate + H2O2 = dehydroascorbate + 2 H2O.
Subcellular location	Plastid › chloroplast thylakoid lumen.
Sequence similarities	Belongs to the peroxidase family. Ascorbate peroxidase subfamily.

Ontologies

Keywords
Biological process	Hydrogen peroxide
Cellular component	Chloroplast Plastid Thylakoid
Molecular function	Oxidoreductase Peroxidase
Technical term	Direct protein sequencing
Gene Ontology (GO)
Biological process	hydrogen peroxide catabolic process Inferred from electronic annotation. Source: UniProtKB-KW oxidation reduction Inferred from electronic annotation. Source: UniProtKB-KW
Cellular component	chloroplast thylakoid lumen Inferred from electronic annotation. Source: UniProtKB-SubCell
Molecular function	L-ascorbate peroxidase activity Inferred from electronic annotation. Source: EC
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – ›30	›30	Putative L-ascorbate peroxidase, chloroplastic		PRO_0000055598
Experimental info
	Non-terminal residue	30	1

Sequences

	Sequence		Length	Mass (Da)
	P81833-1 [UniParc]. Last modified May 30, 2000. Version 1. Checksum: 62CFECD847A3FA52	FASTA	30	3,546
	10 20 30 ADLIQRRQRS EFQSDIKGIL YTVIKKNPDL

References

[1]	"The thylakoid lumen of chloroplasts. Isolation and characterization." Kieselbach T., Hagman A., Andersson B., Schroeder W.P. J. Biol. Chem. 273:6710-6716(1998) [PubMed: 9506969] [Abstract] Cited for: PROTEIN SEQUENCE. Tissue: Leaf.

Cross-references

3D structure databases
ModBase	Search...
Enzyme and pathway databases
BRENDA	1.11.1.11. 286.
Family and domain databases
ProtoNet	Search...

Entry information

Entry name

APX4_SPIOL

Accession

Primary (citable) accession number: P81833

Entry history

Integrated into UniProtKB/Swiss-Prot:	May 30, 2000
Last sequence update:	May 30, 2000
Last modified:	June 16, 2009
This is version 33 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

PPAP (Plant Proteome Annotation Project)