1SML

METALLO BETA LACTAMASE L1 FROM STENOTROPHOMONAS MALTOPHILIA

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Structure Motif: Primary M-CSA Annotation

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1smla_	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

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Metallo-hydrolase/oxidoreductase	8037062	3001057	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Lactamase_B_6	e1smlA1	A: a+b four layers	X: Metallo-hydrolase/oxidoreductase (From Topology)	H: Metallo-hydrolase/oxidoreductase (From Topology)	T: Metallo-hydrolase/oxidoreductase	F: Lactamase_B_6	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.60.15.10	Alpha Beta	4-Layer Sandwich	Metallo-beta-lactamase	Chain A	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00753	Metallo-beta-lactamase superfamily (Lactamase_B)	Metallo-beta-lactamase superfamily		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	PROTEIN (PENICILLINASE)	beta-lactamase activity hydrolase activity hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds, in cyclic amides catalytic activity hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds cation binding transition metal ion binding zinc ion binding ion binding binding metal ion binding small molecule binding	antibiotic metabolic process catabolic process metabolic process cellular process antibiotic catabolic process response to stimulus response to chemical response to antibiotic	cellular anatomical structure periplasmic space

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR001018	Beta-lactamase, class-B, conserved site	Conserved Site
A	IPR036866	Ribonuclease Z/Hydroxyacylglutathione hydrolase-like	Homologous Superfamily
A	IPR001279	Metallo-beta-lactamase	Domain
A	IPR050855	Metallo-beta-lactamase type 2-like	Family

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

Chains	Enzyme Name	Description	Catalytic Residues
A	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 \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 3.5.2.6 (PDB Primary Data) Search M-CSA Motif + EC 3.5.2.6

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.