Reviewed, UniProtKB/Swiss-Prot Q08305 (PPOC_SOLLC)

Names and origin

Protein names	Recommended name:     Polyphenol oxidase C, chloroplastic       Short name=PPO     EC=1.10.3.1 Alternative name(s):     Catechol oxidase
Organism	Solanum lycopersicum (Tomato) (Lycopersicon esculentum)
Taxonomic identifier	4081 [NCBI]
Taxonomic lineage	Eukaryota › Viridiplantae › Streptophyta › Embryophyta › Tracheophyta › Spermatophyta › Magnoliophyta › eudicotyledons › core eudicotyledons › asterids › lamiids › Solanales › Solanaceae › Solanoideae › Solaneae › Solanum › Lycopersicon

Protein attributes

Sequence length	626 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is further processed into a mature form.
Protein existence	Inferred from homology.

General annotation (Comments)

Function	Catalyzes the oxidation of mono- and o-diphenols to o-diquinones.
Catalytic activity	2 catechol + O2 = 2 1,2-benzoquinone + 2 H2O.
Cofactor	Binds 2 copper ions per subunit By similarity.
Subcellular location	Plastid › chloroplast thylakoid lumen.
Sequence similarities	Belongs to the tyrosinase family.

Ontologies

Keywords
Cellular component	Chloroplast Plastid Thylakoid
Domain	Transit peptide
Ligand	Copper Metal-binding
Molecular function	Oxidoreductase
PTM	Disulfide bond Thioether bond
Gene Ontology (GO)
Biological process	oxidation reduction Inferred from electronic annotation. Source: UniProtKB-KW
Cellular component	chloroplast thylakoid lumen Inferred from electronic annotation. Source: UniProtKB-SubCell
Molecular function	catechol oxidase activity Inferred from electronic annotation. Source: EC copper 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
	Transit peptide	1 – 83	83	Chloroplast By similarity
	Chain	84 – 626	543	Polyphenol oxidase C, chloroplastic		PRO_0000035912
Sites
	Metal binding	176	1	Copper A By similarity
	Metal binding	194	1	Copper A By similarity
	Metal binding	203	1	Copper A By similarity
	Metal binding	324	1	Copper B By similarity
	Metal binding	328	1	Copper B By similarity
	Metal binding	366	1	Copper B By similarity
Amino acid modifications
	Disulfide bond	94 ↔ 110		By similarity
	Disulfide bond	109 ↔ 177		By similarity
	Cross-link	180 ↔ 194		2'-(S-cysteinyl)-histidine (Cys-His) By similarity

Sequences

	Sequence		Length	Mass (Da)
	Q08305-1 [UniParc]. Last modified November 1, 1995. Version 1. Checksum: 712D8F9E82E7A3DB	FASTA	626	70,333
	10 20 30 40 50 60 MASLCSNSST TSLKTPFTSL GSTPKPCQLF LHGKRNKAFK VSCKVTNTNG NQDETNSVDR 70 80 90 100 110 120 RNVLLGLGGL YGVANAIPLA ASAAPTPPPD LSSCSIARID ENQVVSYSCC APKPDDMEKV 130 140 150 160 170 180 PYYKFPSMTK LRVRQPAHEA DEEYIAKYNC AVTKMKDLDK TQPDNPIGFK QQANIHCAYC 190 200 210 220 230 240 NGGYSIDGKV LQVHNSWLFF PFHRWYLYFY ERILGSLIDD PTFGLPFWNW DHPKGMRFPP 250 260 270 280 290 300 MFDVPGTALY DERRGDQIHN GNGIDLGYFG DQVETTQLQL MTNNLTLMYR QLVTNSPCPL 310 320 330 340 350 360 MSLVDLTLFG STVEDAGTVE NIPHSPVHIW VGTRRGSVLP VGKISNGEDM GNFYSAGLDP 370 380 390 400 410 420 LFYCHHSNVD RMWNEWKATG GKRTDIQNKD WLNSEFFFYD ENGNPFKVRV RDCLDTKKMG 430 440 450 460 470 480 YDYHATATPW RNFKPKTKAS AGKVNTGSIP PESQVFPLAK LDKAISFSIN RPASSRTQQE 490 500 510 520 530 540 KNAQEEVLTF NAIKYDNRDY IRFDVFLNVD NNVNANELDK AEFAGSYTSL PHVHRVGDPK 550 560 570 580 590 600 HTATATLRLA ITELLEDIGL EDEDTIAVTL VPKKGDISIG GVEIKLAIVK LVCVVNLLTL 610 620 QLNKDRFCYD SVFVCWFVCL FFNFHV

References

[1]	"Organisation of the tomato polyphenol oxidase gene family." Newman S.M., Eannetta N.T., Yu H., Prince J.P., de Vicente M.C., Tanksley S.D., Steffens J.C. Plant Mol. Biol. 21:1035-1051(1993) [PubMed: 8098228] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA]. Strain: cv. VFNT Cherry.

Cross-references

Sequence databases
EMBL GenBank DDBJ	Z12835 Genomic DNA. Translation: CAA78297.1.
PIR	S33541.
3D structure databases
SMR	Q08305. Positions 84-431.
ModBase	Search...
Enzyme and pathway databases
BRENDA	1.10.3.1. 281054.
Family and domain databases
InterPro	IPR008922. Di-copper_centre. IPR016213. Polyphenol_Oxase_pln. IPR002227. Tyrosinase. [Graphical view]
Gene3D	G3DSA:1.10.1280.10. Di-copper_centre. 1 hit.
Pfam	PF00264. Tyrosinase. 1 hit. [Graphical view]
PIRSF	PIRSF000290. PPO_plant. 1 hit.
PRINTS	PR00092. TYROSINASE.
PROSITE	PS00497. TYROSINASE_1. 1 hit. PS00498. TYROSINASE_2. 1 hit. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

PPOC_SOLLC

Accession

Primary (citable) accession number: Q08305

Entry history

Integrated into UniProtKB/Swiss-Prot:	November 1, 1995
Last sequence update:	November 1, 1995
Last modified:	January 19, 2010
This is version 58 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

PPAP (Plant Proteome Annotation Project)