Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
B [auth A]SCOP2B SuperfamilySubtilisin-like8069727 3000226 SCOP2B (2022-06-29)
C [auth E]SCOP2B SuperfamilyEGF/Laminin-like8056609 3000412 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
A [auth P]Inhibitor_I9e3bpsP2 A: a+b two layersX: Alpha-beta plaitsH: Protease propeptides/inhibitors (From Topology)T: Protease propeptides/inhibitorsF: Inhibitor_I9ECOD (1.6)
B [auth A]PCSK9_C-CRD_1ste3bpsA3 A: beta duplicates or obligate multimersX: Resistin (From Topology)H: Resistin (From Topology)T: ResistinF: PCSK9_C-CRD_1stECOD (1.6)
B [auth A]PCSK9_C-CRD_3rde3bpsA4 A: beta duplicates or obligate multimersX: Resistin (From Topology)H: Resistin (From Topology)T: ResistinF: PCSK9_C-CRD_3rdECOD (1.6)
B [auth A]Peptidase_S8e3bpsA1 A: a/b three-layered sandwichesX: Subtilisin-likeH: Subtilisin-like (From Topology)T: Subtilisin-likeF: Peptidase_S8ECOD (1.6)
C [auth E]FXa_inhibitione3bpsE1 A: few secondary structure elementsX: EGF-likeH: EGF-relatedT: EGF/LamininF: FXa_inhibitionECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
A [auth P]PF05922Peptidase inhibitor I9 (Inhibitor_I9)Peptidase inhibitor I9This family includes the proteinase B inhibitor from Saccharomyces cerevisiae and the activation peptides from peptidases of the subtilisin family. The subtilisin propeptides are known to function as molecular chaperones, assisting in the folding of ...This family includes the proteinase B inhibitor from Saccharomyces cerevisiae and the activation peptides from peptidases of the subtilisin family. The subtilisin propeptides are known to function as molecular chaperones, assisting in the folding of the mature peptidase [1], but have also been shown to act as 'temporary inhibitors' [2].
Domain
B [auth A]PF00082Subtilase family (Peptidase_S8)Subtilase familySubtilases are a family of serine proteases. They appear to have independently and convergently evolved an Asp/Ser/His catalytic triad, like that found in the trypsin serine proteases (see Pfam:PF00089). Structure is an alpha/beta fold containing a 7 ...Subtilases are a family of serine proteases. They appear to have independently and convergently evolved an Asp/Ser/His catalytic triad, like that found in the trypsin serine proteases (see Pfam:PF00089). Structure is an alpha/beta fold containing a 7-stranded parallel beta sheet, order 2314567.
Domain
B [auth A]PF18463Proprotein convertase subtilisin-like/kexin type 9 C-terminal domain (PCSK9_C3)Proprotein convertase subtilisin-like/kexin type 9 C-terminal domainThis entry represents a subdomain found in the C-terminal cysteine/histidine-rich domain (CRD) of PCSK9 (also known as neural apoptosis-regulated convertase, NARC-1) [1]. PCSK9 has been shown to regulate circulating LDL-R levels by controlling LDL-R ...This entry represents a subdomain found in the C-terminal cysteine/histidine-rich domain (CRD) of PCSK9 (also known as neural apoptosis-regulated convertase, NARC-1) [1]. PCSK9 has been shown to regulate circulating LDL-R levels by controlling LDL-R degradation. Furthermore, numerous mutations in the PCSK9 gene have been identified and associated with hypercholesterolemia (gain of function) or hypocholesterolemia (loss of function) [2]. The fully folded CRD, shows structural similarity to the resistin homotrimer, a small cytokine associated with obesity and diabetes. The C-terminal domain from PCSK9 consists of three, three-stranded beta-subdomains arranged in a pseudothreefold, and each of the subdomains in the CRD of PCSK9 consists of three structurally conserved disulfide bonds [1].
Domain
B [auth A]PF18459Proprotein convertase subtilisin-like/kexin type 9 C-terminal domain (PCSK9_C1)Proprotein convertase subtilisin-like/kexin type 9 C-terminal domainThis entry represents a subdomain found in the C-terminal cysteine/histidine-rich domain (CRD) of PCSK9 (also known as neural apoptosis-regulated convertase, NARC-1) [1]. PCSK9 has been shown to regulate circulating LDL-R levels by controlling LDL-R ...This entry represents a subdomain found in the C-terminal cysteine/histidine-rich domain (CRD) of PCSK9 (also known as neural apoptosis-regulated convertase, NARC-1) [1]. PCSK9 has been shown to regulate circulating LDL-R levels by controlling LDL-R degradation. Furthermore, numerous mutations in the PCSK9 gene have been identified and associated with hypercholesterolemia (gain of function) or hypocholesterolemia (loss of function) [2]. The fully folded CRD, shows structural similarity to the resistin homotrimer, a small cytokine associated with obesity and diabetes. The C-terminal domain from PCSK9 consists of three, three-stranded beta-subdomains arranged in a pseudothreefold, and each of the subdomains in the CRD of PCSK9 consists of three structurally conserved disulfide bonds [1].
Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
A [auth P]Proprotein convertase subtilisin/kexin type 9
B [auth A]Proprotein convertase subtilisin/kexin type 9
C [auth E]Low-density lipoprotein receptor

InterPro: Protein Family Classification InterPro Database Homepage

ChainsAccessionNameType
A [auth P]IPR041052Proprotein convertase subtilisin/kexin type 9, C-terminal domain 2Domain
A [auth P]IPR037045Peptidase S8 propeptide/proteinase inhibitor I9 superfamilyHomologous Superfamily
A [auth P]IPR010259Peptidase S8 propeptide/proteinase inhibitor I9Domain
A [auth P]IPR000209Peptidase S8/S53 domainDomain
A [auth P]IPR015500Peptidase S8, subtilisin-relatedFamily
A [auth P]IPR041051Proprotein convertase subtilisin/kexin type 9, C-terminal domain 3Domain
A [auth P]IPR034193Proteinase K-like catalytic domainDomain
A [auth P]IPR041254Proprotein convertase subtilisin/kexin type 9, C-terminal domain 1Domain
A [auth P]IPR036852Peptidase S8/S53 domain superfamilyHomologous Superfamily
B [auth A]IPR041052Proprotein convertase subtilisin/kexin type 9, C-terminal domain 2Domain
B [auth A]IPR037045Peptidase S8 propeptide/proteinase inhibitor I9 superfamilyHomologous Superfamily
B [auth A]IPR010259Peptidase S8 propeptide/proteinase inhibitor I9Domain
B [auth A]IPR000209Peptidase S8/S53 domainDomain
B [auth A]IPR015500Peptidase S8, subtilisin-relatedFamily
B [auth A]IPR041051Proprotein convertase subtilisin/kexin type 9, C-terminal domain 3Domain
B [auth A]IPR034193Proteinase K-like catalytic domainDomain
B [auth A]IPR041254Proprotein convertase subtilisin/kexin type 9, C-terminal domain 1Domain
B [auth A]IPR036852Peptidase S8/S53 domain superfamilyHomologous Superfamily
C [auth E]IPR018097EGF-like calcium-binding, conserved siteConserved Site
C [auth E]IPR036055LDL receptor-like superfamilyHomologous Superfamily
C [auth E]IPR000033LDLR class B repeatRepeat
C [auth E]IPR001881EGF-like calcium-binding domainDomain
C [auth E]IPR023415Low-density lipoprotein (LDL) receptor class A, conserved siteConserved Site
C [auth E]IPR011042Six-bladed beta-propeller, TolB-likeHomologous Superfamily
C [auth E]IPR002172Low-density lipoprotein (LDL) receptor class A repeatRepeat
C [auth E]IPR000742EGF-like domainDomain
C [auth E]IPR009030Growth factor receptor cysteine-rich domain superfamilyHomologous Superfamily
C [auth E]IPR000152EGF-type aspartate/asparagine hydroxylation sitePTM

Pharos: Disease Associations Pharos Homepage Annotation

ChainsDrug Target  Associated Disease
A [auth P]PharosQ8NBP7
B [auth A]PharosQ8NBP7
C [auth E]PharosP01130