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

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Ad1smla_ Alpha and beta proteins (a+b) Metallo-hydrolase/oxidoreductase Metallo-hydrolase/oxidoreductase Zn metallo-beta-lactamase Zn metallo-beta-lactamase (Stenotrophomonas maltophilia ) [TaxId: 40324 ], SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2B SuperfamilyMetallo-hydrolase/oxidoreductase 8037062 3001057 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
ALactamase_B_6e1smlA1 A: a+b four layersX: Metallo-hydrolase/oxidoreductase (From Topology)H: Metallo-hydrolase/oxidoreductase (From Topology)T: Metallo-hydrolase/oxidoreductaseF: Lactamase_B_6ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A3.60.15.10 Alpha Beta 4-Layer Sandwich Metallo-beta-lactamase Chain ACATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
PF00753Metallo-beta-lactamase superfamily (Lactamase_B)Metallo-beta-lactamase superfamily- Domain

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

ChainsEnzyme NameDescriptionCatalytic Residues
beta-lactamase (Class B1)  M-CSA #258

The L1 metallo-beta-lactamase from Stenotrophomonas maltophilia is unique among beta-lactamases in that it is tetrameric. S. maltophilia has emerged as a significant hospital-derived pathogen of immunocompromised hosts such as cancer, cystic fibrosis and transplant patients. L1 is localised to the periplasm and hydrolyses carbapenem drugs, conferring antibiotic resistance.

L1 is a Class B1 metallo-beta-lactamases as it binds two Zn(II) ions for the hydrolytic reaction, but its Zn2 binding site is different to most B1 type enzymes (it is also known as an L1 type 3 beta-lactamse).

Defined by 7 residues: HIS:A-84HIS:A-86ASP:A-88HIS:A-89HIS:A-160TYR:A-191HIS:A-225
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