Reviewed, UniProtKB/Swiss-Prot Q01MI9 (APX3_ORYSI)

Names and origin

Protein names

Recommended name:
    Probable L-ascorbate peroxidase 3
    EC=1.11.1.11
Alternative name(s):
    OsAPx03

Gene names

Name:	APX3
ORF Names:	H0515C11.2, OsI_014375

Organism

Oryza sativa subsp. indica (Rice)

Taxonomic identifier

39946 [NCBI]

Taxonomic lineage

Eukaryota › Viridiplantae › Streptophyta › Embryophyta › Tracheophyta › Spermatophyta › Magnoliophyta › Liliopsida › Poales › Poaceae › BEP clade › Ehrhartoideae › Oryzeae › Oryza

Protein attributes

Sequence length	291 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is not processed.
Protein existence	Evidence at transcript level.

General annotation (Comments)

Function	Plays a key role in hydrogen peroxide removal By similarity.
Catalytic activity	L-ascorbate + H(2)O(2) = dehydroascorbate + 2 H(2)O.
Cofactor	Binds 1 heme B (iron-protoporphyrin IX) group By similarity. Binds 1 potassium or calcium ion per subunit By similarity.
Subcellular location	Membrane; Single-pass membrane proteinPotential.
Sequence similarities	Belongs to the peroxidase family. Ascorbate peroxidase subfamily.
Caution	According to Ref.1, it may be peroxisomal. There is however no experimental evidence to prove this.

Ontologies

Keywords
Biological process	Hydrogen peroxide
Cellular component	Membrane
Domain	Transmembrane
Ligand	Calcium Heme Iron Metal-binding Potassium
Molecular function	Oxidoreductase Peroxidase
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	integral to membrane Inferred from electronic annotation. Source: UniProtKB-KW
Molecular function	L-ascorbate peroxidase activity Inferred from electronic annotation. Source: EC calcium ion binding Inferred from electronic annotation. Source: UniProtKB-KW heme binding Inferred from electronic annotation. Source: InterPro iron ion binding Inferred from electronic annotation. Source: UniProtKB-KW potassium ion binding Inferred from electronic annotation. Source: UniProtKB-KW
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 291	291	Probable L-ascorbate peroxidase 3		PRO_0000300258
Regions
	Transmembrane	263 – 283	21	Potential
Sites
	Active site	41	1	Proton acceptor By similarity
	Metal binding	161	1	Iron (heme axial ligand) By similarity
	Metal binding	162	1	Potassium or calcium By similarity
	Metal binding	178	1	Potassium or calcium By similarity
	Metal binding	185	1	Potassium or calcium By similarity
	Site	37	1	Transition state stabilizer By similarity

Sequences

	Sequence		Length	Mass (Da)
	Q01MI9-1 [UniParc]. Last modified November 14, 2006. Version 1. Checksum: 9D2E57C3DBC277F6	FASTA	291	32,076
	10 20 30 40 50 60 MSAAPVVDAE YMAEVERARR DLRALIASKS CAPIMLRLAW HDAGTYDKAT KTGGPNGSIR 70 80 90 100 110 120 FPQEYSHAAN AGIKIAIDLL EPMKQRHPKI TYADLYQLAG VVAVEVTGGP TIDYVPGRRD 130 140 150 160 170 180 SSDSPEEGRL PDAKKGAAHL REVFYRMGLS DKDIVALSGG HTLGKARPER SGFDGAWTKD 190 200 210 220 230 240 PLKFDNSYFI ELLKENSEGL LKLPTDKALV EDPTFRRYVE LYAKDEDAFF RDYAESHKKL 250 260 270 280 290 SELGFTPPRS AFIYKSCQKP KSLLMQTAAG VAVAAAVVAW AYLCESNKRL G

References

	« Hide 'large scale' referencesShow 'large scale' references »
[1]	"Analysis of the molecular evolutionary history of the ascorbate peroxidase gene family: inferences from the rice genome." Teixeira F.K., Menezes-Benavente L., Margis R., Margis-Pinheiro M. J. Mol. Evol. 59:761-770(2004) [PubMed: 15599508] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA], NOMENCLATURE.
[2]	"Sequence and analysis of rice chromosome 4." Feng Q., Zhang Y., Hao P., Wang S., Fu G., Huang Y., Li Y., Zhu J., Liu Y., Hu X., Jia P., Zhang Y., Zhao Q., Ying K., Yu S., Tang Y., Weng Q., Zhang L. , Lu Y., Mu J., Lu Y., Zhang L.S., Yu Z., Fan D., Liu X., Lu T., Li C., Wu Y., Sun T., Lei H., Li T., Hu H., Guan J., Wu M., Zhang R., Zhou B., Chen Z., Chen L., Jin Z., Wang R., Yin H., Cai Z., Ren S., Lv G., Gu W., Zhu G., Tu Y., Jia J., Zhang Y., Chen J., Kang H., Chen X., Shao C., Sun Y., Hu Q., Zhang X., Zhang W., Wang L., Ding C., Sheng H., Gu J., Chen S., Ni L., Zhu F., Chen W., Lan L., Lai Y., Cheng Z., Gu M., Jiang J., Li J., Hong G., Xue Y., Han B. Nature 420:316-320(2002) [PubMed: 12447439] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: cv. Guang-Lu-Ai No.4.
[3]	"The genomes of Oryza sativa: a history of duplications." Yu J., Wang J., Lin W., Li S., Li H., Zhou J., Ni P., Dong W., Hu S., Zeng C., Zhang J., Zhang Y., Li R., Xu Z., Li S., Li X., Zheng H., Cong L. , Lin L., Yin J., Geng J., Li G., Shi J., Liu J., Lv H., Li J., Wang J., Deng Y., Ran L., Shi X., Wang X., Wu Q., Li C., Ren X., Wang J., Wang X., Li D., Liu D., Zhang X., Ji Z., Zhao W., Sun Y., Zhang Z., Bao J., Han Y., Dong L., Ji J., Chen P., Wu S., Liu J., Xiao Y., Bu D., Tan J., Yang L., Ye C., Zhang J., Xu J., Zhou Y., Yu Y., Zhang B., Zhuang S., Wei H., Liu B., Lei M., Yu H., Li Y., Xu H., Wei S., He X., Fang L., Zhang Z., Zhang Y., Huang X., Su Z., Tong W., Li J., Tong Z., Li S., Ye J., Wang L., Fang L., Lei T., Chen C.-S., Chen H.-C., Xu Z., Li H., Huang H., Zhang F., Xu H., Li N., Zhao C., Li S., Dong L., Huang Y., Li L., Xi Y., Qi Q., Li W., Zhang B., Hu W., Zhang Y., Tian X., Jiao Y., Liang X., Jin J., Gao L., Zheng W., Hao B., Liu S.-M., Wang W., Yuan L., Cao M., McDermott J., Samudrala R., Wang J., Wong G.K.-S., Yang H. PLoS Biol. 3:266-281(2005) [PubMed: 15685292] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: cv. 93-11.

Cross-references

Sequence databases
EMBLGenBankDDBJ	AY382617 mRNA. Translation: AAQ88105.1. CR855043 Genomic DNA. Translation: CAH66026.1. CM000129 Genomic DNA. Translation: EAY93142.1.
3D structure databases
HSSP	HSSP built from PDB template 1APX based on UniProtKB P48534.
ModBase	Search...
Organism-specific databases
Gramene	Q6TY83.
Family and domain databases
InterPro	IPR002207. Asc_perxdse. IPR002016. Haem_peroxidase_pln/fun/bac. [Graphical view]
Pfam	PF00141. peroxidase. 1 hit. [Graphical view]
PRINTS	PR00459. ASPEROXIDASE. PR00458. PEROXIDASE.
PROSITE	PS00435. PEROXIDASE_1. 1 hit. PS00436. PEROXIDASE_2. 1 hit. PS50873. PEROXIDASE_4. 1 hit. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

APX3_ORYSI

Accession

Primary (citable) accession number: Q01MI9
Secondary accession number(s): A2XQN2, Q6TY83, Q7XWZ7

Entry history

Integrated into UniProtKB/Swiss-Prot:	September 11, 2007
Last sequence update:	November 14, 2006
Last modified:	November 25, 2008
This is version 13 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

PPAP (Plant Proteome Annotation Project)