1KEI

Thermolysin (substrate-free)

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	d1keia_	Alpha and beta proteins (a+b)	Zincin-like	Metalloproteases ('zincins'), catalytic domain	Thermolysin-like	Thermolysin	(Bacillus thermoproteolyticus ) [TaxId: 1427 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Metalloproteases (zincins), catalytic domain	8042780	3001975	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	Peptidase_M4_C	e1keiA1	A: mixed a+b and a/b	X: Zincin-like	H: Metalloproteases (zincins) catalytic domain (From Topology)	T: Metalloproteases (zincins) catalytic domain	F: Peptidase_M4_C	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.10.170.10	Alpha Beta	Roll	Elastase	domain 1	CATH (4.3.0)
A	1.10.390.10	Mainly Alpha	Orthogonal Bundle	Neutral Protease	domain 2	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF01447	Thermolysin metallopeptidase, catalytic domain (Peptidase_M4)	Thermolysin metallopeptidase, catalytic domain	-	Domain
A	PF02868	Thermolysin metallopeptidase, alpha-helical domain (Peptidase_M4_C)	Thermolysin metallopeptidase, alpha-helical domain	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Thermolysin	cation binding ion binding binding metal ion binding small molecule binding peptidase activity catalytic activity, acting on a protein metalloendopeptidase activity hydrolase activity metallopeptidase activity catalytic activity endopeptidase activity	proteolysis metabolic process primary metabolic process protein metabolic process macromolecule metabolic process	extracellular region cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR001570	Peptidase M4, C-terminal	Domain
A	IPR013856	Peptidase M4 domain	Domain
A	IPR027268	Peptidase M4/M1, CTD superfamily	Homologous Superfamily
A	IPR050728	Extracellular Zinc Metalloprotease M4	Family
A	IPR011096	FTP domain	Domain
A	IPR025711	PepSY domain	Domain
A	IPR023612	Peptidase M4	Family

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

Chains	Enzyme Name	Description	Catalytic Residues
A	thermolysin M-CSA #176	This entry covers the metalloproteinase family M4, which contains thermolysin (EC3.4.24.27), bacillolysins (EC 3.4.24.28), pseudolysins (EC 3.4.24.26), Vibriolysin (EC3.4.24.25) and several other proteases which do not have EC numbers. Family M4 are the only members of clan MA to have structures within the PDB. The active site lies between the two domains and contains a catalytic zinc ion.	Defined by 7 residues: HIS:A-142GLU:A-143HIS:A-146TYR:A-157GLU:A-166ASP:A-226HIS:A-231 \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 3.4.24.27 (PDB Primary Data) Search M-CSA Motif + EC 3.4.24.27

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.