3ISY

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF12690	e3isyA1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PF12690	ECOD (1.6)

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.60.40.2360	Mainly Beta	Sandwich	Immunoglobulin-like	Intracellular proteinase inhibitor BsuPI	CATH (4.3.0)

Chains	Accession	Name	Description	Comments	Source
A	PF12690	Intracellular proteinase inhibitor (BsuPI)	Intracellular proteinase inhibitor	This is a bacterial domain which has been named BsuPI in Bacillus subtilis. This domain is found in Swiss:P39804, where it has been suggested to regulate the major intracellular proteinase (ISP-1) activity in vivo [1]. The structure of proteins in ...	This is a bacterial domain which has been named BsuPI in Bacillus subtilis. This domain is found in Swiss:P39804, where it has been suggested to regulate the major intracellular proteinase (ISP-1) activity in vivo [1]. The structure of proteins in this family adopt an Ig-like fold [2].	Domain

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Intracellular proteinase inhibitor	enzyme regulator activity molecular function inhibitor activity peptidase regulator activity serine-type endopeptidase inhibitor activity molecular function regulator activity enzyme inhibitor activity peptidase inhibitor activity endopeptidase regulator activity endopeptidase inhibitor activity	-	intracellular anatomical structure cytoplasm cellular anatomical entity