1RPT

CRYSTAL STRUCTURES OF RAT ACID PHOSPHATASE COMPLEXED WITH THE TRANSITIONS STATE ANALOGS VANADATE AND MOLYBDATE: IMPLICATIONS FOR THE REACTION MECHANISM


Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Ad1rpta_ Alpha and beta proteins (a/b) Phosphoglycerate mutase-like Phosphoglycerate mutase-like Histidine acid phosphatase Prostatic acid phosphatase Norway rat (Rattus norvegicus ) [TaxId: 10116 ], SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2B SuperfamilyHistidine phosphatase-like8032234 3000781 SCOP2B (2021-05-27)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
APF00328e1rptA1 A: a/b three-layered sandwichesX: Phosphoglycerate mutase-like (From Topology)H: Phosphoglycerate mutase-like (From Topology)T: Phosphoglycerate mutase-likeF: PF00328ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A3.40.50.1240 Alpha Beta 3-Layer(aba) Sandwich Rossmann fold Phosphoglycerate mutase-likeCATH (4.2.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
PF00328Histidine phosphatase superfamily (branch 2) (His_Phos_2)Histidine phosphatase superfamily (branch 2)- Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
PROSTATIC ACID PHOSPHATASE

Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage

ChainsEnzyme NameDescriptionCatalytic Residues
high molecular weight acid phosphatase  M-CSA #454

High molecular weight acid phosphatases (HAPs) form a subclass of phosphomonoesterases which are found in locations as diverse as wheat germ, mammalian prostate tissue, and as extracellular or periplasmic enzymes in fungi and bacteria.

These proteins act as non-specific tyrosine phosphatase that dephosphorylate a diverse number of substrates under acidic conditions (pH 4-6) including alkyl, aryl, and acyl orthophosphate monoesters and phosphorylated proteins. They have also been shown to have lipid phosphatase activity. In mammals they have been shown to inactivate lysophosphatidic acid in seminal plasma. In the fungus Aspergillus ficuum the homologous phytase is essential in metabolising phytate, the major phosphorous storage form in plant seeds.

The HAPs have a distinct mechanism from other acid phosphatases; they retain the configuration of the substrate phosphorous atom while the purple acid phosphatases reverse it, and use a phospho-histidine intermediate. Evidently nature has 'discovered' multiple ways of catalysing this important reaction.

Defined by 6 residues: ARG:A-11HIS:A-12ARG:A-15ARG:A-79HIS:A-257ASP:A-258
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