Reviewed, UniProtKB/Swiss-Prot P81440 (PHYB_ASPFI)

Names and origin

Protein names

Recommended name:
    3-phytase B
    EC=3.1.3.8
Alternative name(s):
    3 phytase B
    Myo-inositol-hexaphosphate 3-phosphohydrolase B
    Myo-inositol hexakisphosphate phosphohydrolase B

Gene names

Name:

phyB

Organism

Aspergillus ficuum

Taxonomic identifier

5058 [NCBI]

Taxonomic lineage

Eukaryota › Fungi › Dikarya › Ascomycota › Pezizomycotina › Eurotiomycetes › Eurotiomycetidae › Eurotiales › Trichocomaceae › mitosporic Trichocomaceae › Aspergillus

Protein attributes

Sequence length	28 AA.
Sequence status	Fragment.
Sequence processing	The displayed sequence is not processed.
Protein existence	Evidence at protein level.

General annotation (Comments)

Function	Catalyzes the hydrolysis of inorganic orthophosphate from phytate.
Catalytic activity	Myo-inositol hexakisphosphate + H2O = 1D-myo-inositol 1,2,4,5,6-pentakisphosphate + phosphate.
Sequence similarities	Belongs to the histidine acid phosphatase family.

Ontologies

Keywords
Molecular function	Hydrolase
Technical term	Direct protein sequencing
Gene Ontology (GO)
Molecular function	3-phytase activity Inferred from electronic annotation. Source: EC acid phosphatase activity Inferred from electronic annotation. Source: InterPro
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	‹1 – ›28	›28	3-phytase B		PRO_0000114471
Sites
	Active site	17	1	Nucleophile By similarity
Experimental info
	Non-terminal residue	1	1
	Non-terminal residue	28	1

Sequences

	Sequence		Length	Mass (Da)
	P81440-1 [UniParc]. Last modified December 15, 1998. Version 1. Checksum: 675340A707C57CD8	FASTA	28	3,114
	10 20 RDPTGCEVDQ VIMVKRHGER YPSPSAGK

References

[1]	"Identification of active-site residues in Aspergillus ficuum extracellular pH 2.5 optimum acid phosphatase." Ullah A.H., Dischinger H.C. Jr. Biochem. Biophys. Res. Commun. 192:754-759(1993) [PubMed: 8484781] [Abstract] Cited for: PROTEIN SEQUENCE.

Cross-references

Sequence databases
PIR	JN0715.
3D structure databases
HSSP	HSSP built from PDB template 1QFX based on UniProtKB P34755.
ModBase	Search...
Enzyme and pathway databases
BRENDA	3.1.3.8. 81696.
Family and domain databases
InterPro	IPR000560. Histidine_acid_Pase. [Graphical view]
Pfam	PF00328. Acid_phosphat_A. 1 hit. [Graphical view]
PROSITE	PS00616. HIS_ACID_PHOSPHAT_1. 1 hit. PS00778. HIS_ACID_PHOSPHAT_2. Partial match. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

PHYB_ASPFI

Accession

Primary (citable) accession number: P81440

Entry history

Integrated into UniProtKB/Swiss-Prot:	December 15, 1998
Last sequence update:	December 15, 1998
Last modified:	January 20, 2009
This is version 39 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

FPAP (Fungal Proteome Annotation Project)