2B9L

Crystal structure of prophenoloxidase activating factor-II from the beetle Holotrichia diomphalia

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Clip domain	8104047	4005461	SCOP2 (2022-06-29)
A	SCOP2 Family	Eukaryotic proteases	8104055	4000286	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Clip domain	8104051	3002812	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Trypsin-like serine proteases	8104056	3000114	SCOP2 (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	PF00089	e2b9lA2	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: FMN-binding split barrel 2	F: PF00089	ECOD (1.6)
A	PF18322	e2b9lA1	A: few secondary structure elements	X: CLIP domain (From Topology)	H: CLIP domain (From Topology)	T: CLIP domain	F: PF18322	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.40.10.10	Mainly Beta	Beta Barrel	Thrombin, subunit H	Trypsin-like serine proteases	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF18322	Serine protease Clip domain PPAF-2 (CLIP_1)	Serine protease Clip domain PPAF-2	This domain is found in Prophenoloxidase-activating factor (PPAF)-II present in the beetle Holotrichia diomphalia. PPAF-II is indispensable for the generation of the active phenoloxidase leading to melanization, a major defense mechanism of insects. ...	This domain is found in Prophenoloxidase-activating factor (PPAF)-II present in the beetle Holotrichia diomphalia. PPAF-II is indispensable for the generation of the active phenoloxidase leading to melanization, a major defense mechanism of insects. This domain is the clip domain and it is thought to tightly associate with regions I-III of the serine protease-like (SPL) domain. The clip domain is a protein-interaction module that plays an essential role in the binding and activation of PO76s via its central cleft [1].	Domain
A	PF00089	Trypsin (Trypsin)	Trypsin	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	prophenoloxidase activating factor	peptidase activity catalytic activity, acting on a protein serine hydrolase activity serine-type peptidase activity hydrolase activity serine-type endopeptidase activity catalytic activity endopeptidase activity cation binding ion binding binding metal ion binding small molecule binding	biological process involved in interspecies interaction between organisms response to stimulus immune response response to other organism defense response defense response to symbiont response to external stimulus response to biotic stimulus immune system process defense response to other organism response to stress innate immune response response to external biotic stimulus organic substance metabolic process biological process involved in interspecies interaction between organisms response to stimulus immune response response to other organism defense response defense response to symbiont response to external stimulus response to biotic stimulus immune system process defense response to other organism response to stress innate immune response response to external biotic stimulus organic substance metabolic process organonitrogen compound metabolic process proteolysis metabolic process primary metabolic process protein metabolic process macromolecule metabolic process defense response to bacterium response to bacterium	extracellular region cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR001254	Serine proteases, trypsin domain	Domain
A	IPR009003	Peptidase S1, PA clan	Homologous Superfamily
A	IPR022700	Proteinase, regulatory CLIP domain	Domain
A	IPR043504	Peptidase S1, PA clan, chymotrypsin-like fold	Homologous Superfamily
A	IPR041515	PPAF-2-like, Clip domain	Domain
A	IPR001314	Peptidase S1A, chymotrypsin family	Family

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.