Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2B SuperfamilyPAZ domain 8053659 3001750 SCOP2B (2022-06-29)
ASCOP2B SuperfamilyRibonuclease H-like 8053661 3000143 SCOP2B (2022-06-29)
ASCOP2B SuperfamilyMid domain of argonaute 8053594 3002210 SCOP2B (2022-06-29)
ASCOP2B SuperfamilyRNA-binding domain, RBD 8053657 3000110 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
APAZe5weaA2 A: beta barrelsX: SH3H: SH3T: SH3F: PAZECOD (1.6)
AArgoNe5weaA5 A: a+b two layersX: Alpha-beta plaitsH: Argonaute, N-terminal domain (From Topology)T: Argonaute, N-terminal domainF: ArgoNECOD (1.6)
AArgoL1e5weaA4 A: a+b two layersX: Alpha-beta plaitsH: Argonaute, N-terminal domain (From Topology)T: Argonaute, N-terminal domainF: ArgoL1ECOD (1.6)
APiwi_N_1e5weaA1 A: a/b three-layered sandwichesX: Middle domain in Argonaute homologs (From Topology)H: Middle domain in Argonaute homologs (From Topology)T: Middle domain in Argonaute homologsF: Piwi_N_1ECOD (1.6)
APiwi_Ce5weaA3 A: mixed a+b and a/bX: Ribonuclease H-likeH: Ribonuclease H-like (From Topology)T: Ribonuclease H-likeF: Piwi_CECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A2.170.260.10 Mainly Beta Beta Complex paz domain paz domainCATH (4.3.0)
A3.40.50.2300 Alpha Beta 3-Layer(aba) Sandwich Rossmann fold Response regulatorCATH (4.3.0)
A3.30.420.10 Alpha Beta 2-Layer Sandwich Nucleotidyltransferase domain 5CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
PF02171Piwi domain (Piwi)Piwi domain- Family
PF16486N-terminal domain of argonaute (ArgoN)N-terminal domain of argonauteArgoN is the N-terminal domain of argonaute proteins in eukaryotes. ArgoN is composed of an antiparallel four-stranded beta sheet core that has two alpha helices positioned along one face of the sheet and an extended beta strand towards its N-terminu ...ArgoN is the N-terminal domain of argonaute proteins in eukaryotes. ArgoN is composed of an antiparallel four-stranded beta sheet core that has two alpha helices positioned along one face of the sheet and an extended beta strand towards its N-terminus. The core fold of the N domain most closely resembles the catalytic domain of replication-initiator protein Rep. The N domain is linked to the PAZ domain via linker 1 region, and together these three regions are designated the PAZ-containing lobe of argonaute.
Domain
PF16488Argonaute linker 2 domain (ArgoL2)Argonaute linker 2 domain- Family
PF16487Mid domain of argonaute (ArgoMid)Mid domain of argonauteThe ArgoMid domain is found to be part of the Piwi-lobe of the argonaute proteins. It is composed of a parallel four-stranded beta-sheet core surrounded by four alpha-helices and two additional short alpha-helices. It most closely resembles the amino ...The ArgoMid domain is found to be part of the Piwi-lobe of the argonaute proteins. It is composed of a parallel four-stranded beta-sheet core surrounded by four alpha-helices and two additional short alpha-helices. It most closely resembles the amino terminal tryptic core of the E.coli lactose repressor. There is an extensive interface between the Mid and the Piwi domains. The conserved C-terminal half or the Mid has extensive interactions with Piwi, with a deep basic pocket on the surface of the `Mid adjacent to the interface with Piwi. The Mid carries a binding pocket for the 5' phosphate overhang of the guide strand of DNA [1]. The N, Mid, and Piwi domains form a base upon which the PAZ domain sits, resembling a duck. The 5' phosphate and the U1 base are held in place by a conserved network of interactions from protein residues of the Mid and Piwi domains in order to place the guide uniquely in the proper position observed in all Argonaute-RNA complexes [2].
Domain
PF08699Argonaute linker 1 domain (ArgoL1)Argonaute linker 1 domainArgoL1 is a region found in argonaute [1] proteins. It normally co-occurs with Pfam:PF02179 and Pfam:PF02171. It is a linker region between the N-terminal and the PAZ domains. It contains an alpha-helix packed against a three-stranded antiparallel be ...ArgoL1 is a region found in argonaute [1] proteins. It normally co-occurs with Pfam:PF02179 and Pfam:PF02171. It is a linker region between the N-terminal and the PAZ domains. It contains an alpha-helix packed against a three-stranded antiparallel beta-sheet with two long beta-strands (beta8 and beta9) of the sheet spanning one face of the adjacent N and PAZ domains. L1 together with linker 2, L2, PAZ and ArgoN forms a compact global fold [2].
Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
Protein argonaute-2
RNA (5'-R(P*AP*AP*AP*AP*AP*AP*AP*U)-3')---