1CI8

ESTERASE ESTB FROM BURKHOLDERIA GLADIOLI: AN ESTERASE WITH (BETA)-LACTAMASE FOLD.

External Resource: Annotation


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

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Ad1ci8a_ Multi-domain proteins (alpha and beta) beta-lactamase/transpeptidase-like beta-lactamase/transpeptidase-like beta-Lactamase/D-ala carboxypeptidase Esterase EstB (Burkholderia gladioli ) [TaxId: 28095 ], SCOPe (2.08)
Bd1ci8b_ Multi-domain proteins (alpha and beta) beta-lactamase/transpeptidase-like beta-lactamase/transpeptidase-like beta-Lactamase/D-ala carboxypeptidase Esterase EstB (Burkholderia gladioli ) [TaxId: 28095 ], SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2B Superfamilybeta-lactamase/transpeptidase-like8035501 3001604 SCOP2B (2022-06-29)
BSCOP2B Superfamilybeta-lactamase/transpeptidase-like8035501 3001604 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
ABeta-lactamase_1ste1ci8A1 A: alpha complex topologyX: alpha-helical domain in beta-lactamase/transpeptidase-like proteins (From Topology)H: alpha-helical domain in beta-lactamase/transpeptidase-like proteins (From Topology)T: alpha-helical domain in beta-lactamase/transpeptidase-like proteinsF: Beta-lactamase_1stECOD (1.6)
ABeta-lactamase_2nd_1e1ci8A2 A: a+b three layersX: Profilin-likeH: a+b domain in beta-lactamase/transpeptidase-like proteins (From Topology)T: a+b domain in beta-lactamase/transpeptidase-like proteinsF: Beta-lactamase_2nd_1ECOD (1.6)
BBeta-lactamase_1ste1ci8B1 A: alpha complex topologyX: alpha-helical domain in beta-lactamase/transpeptidase-like proteins (From Topology)H: alpha-helical domain in beta-lactamase/transpeptidase-like proteins (From Topology)T: alpha-helical domain in beta-lactamase/transpeptidase-like proteinsF: Beta-lactamase_1stECOD (1.6)
BBeta-lactamase_2nd_1e1ci8B2 A: a+b three layersX: Profilin-likeH: a+b domain in beta-lactamase/transpeptidase-like proteins (From Topology)T: a+b domain in beta-lactamase/transpeptidase-like proteinsF: Beta-lactamase_2nd_1ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A3.40.710.10 Alpha Beta 3-Layer(aba) Sandwich Beta-lactamase DD-peptidase/beta-lactamase superfamilyCATH (4.3.0)
B3.40.710.10 Alpha Beta 3-Layer(aba) Sandwich Beta-lactamase DD-peptidase/beta-lactamase superfamilyCATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
A, B
PF00144Beta-lactamase (Beta-lactamase)Beta-lactamaseThis family appears to be distantly related to Pfam:PF00905 and PF00768 D-alanyl-D-alanine carboxypeptidase.Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
A, B
PROTEIN (CARBOXYLESTERASE) -

InterPro: Protein Family Classification InterPro Database Homepage

ChainsAccessionNameType
A, B
IPR001466Beta-lactamase-relatedDomain
A, B
IPR012338Beta-lactamase/transpeptidase-likeHomologous Superfamily
A, B
IPR023650Beta-lactamase, class-A active siteActive Site

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

ChainsEnzyme NameDescriptionCatalytic Residues
fusarinine-C ornithinesterase  M-CSA #466

EstB is an esterase from Burkholderia gladioli whose physiological function is the hydrolysis of an N5-acyl-L-ornithine ester with moderate S-enantioselectivity.

It is also known to act on short-chain (C4-C6) fatty acid esters and triglycerides, including tertiary alcohol esters (e.g. linalyl acetate). It also shows activity on p-nitrophenyl esters is generally higher than on o-nitrophenyl esters. The Burkholderia gladioli protein is known to be strongly inhibited by eserin, NaF, HgCl2, SDS and Triton X-100.

The primary structure exhibits homology to esterases from family VIII, which are related to class C beta-lactamases. However, catalytic activity is located within the 'beta-lactamase' motif and not the 'esterase' motif. Despite structural similarity with peptidases and class C beta-lactamases, EstB shows no activity with peptides or beta-lactamases.

Defined by 10 residues: SER:A-75LYS:A-78TYR:A-133LEU:A-135ILE:A-152TYR:A-181ASP:A-186HIS:A-253TRP:A-348VAL:A-351
 | 
 
Explore in 3D: M-CSA Motif Definition
Search M-CSA Motif
EC: 3.1.1.1 (PDB Primary Data)