Annotations: 5FSH

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Cas_Csm6 helical domain-like	8045375	4004432	SCOP2 (2021-05-27)
A	SCOP2 Family	Tth_Csm6 N-terminal domain-like	8090357	4004444	SCOP2 (2021-05-27)
A	SCOP2 Superfamily	TPR-like	8090355	3001345	SCOP2 (2021-05-27)
A	SCOP2 Superfamily	HEPN domain-like	8090356	3000904	SCOP2 (2021-05-27)
A	SCOP2 Superfamily	PIN domain-like	8090358	3001041	SCOP2 (2021-05-27)
B	SCOP2B Superfamily	PIN domain-like	8090358	3001041	SCOP2B (2021-05-27)
B	SCOP2B Superfamily	HEPN domain-like	8090356	3000904	SCOP2B (2021-05-27)
B	SCOP2B Superfamily	TPR-like	8090355	3001345	SCOP2B (2021-05-27)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF09670	e5fshA3	A: alpha bundles	X: Four-helical up-and-down bundle	H: HEPN	T: Nucleotidyltransferase substrate binding subunit/domain	F: PF09670	ECOD (1.6)
A	PF22205	e5fshA2	A: alpha bundles	X: CRISPR/Cas system-associated protein Csm6 6H domain (From Topology)	H: CRISPR/Cas system-associated protein Csm6 6H domain (From Topology)	T: CRISPR/Cas system-associated protein Csm6 6H domain	F: PF22205	ECOD (1.6)
A	F_UNCLASSIFIED	e5fshA1	A: a/b three-layered sandwiches	X: CARF (CRISPR-associated Rossmann fold) domains (From Topology)	H: CARF (CRISPR-associated Rossmann fold) domains (From Topology)	T: CARF (CRISPR-associated Rossmann fold) domains	F: F_UNCLASSIFIED	ECOD (1.6)
B	PF09670	e5fshB2	A: alpha bundles	X: Four-helical up-and-down bundle	H: HEPN	T: Nucleotidyltransferase substrate binding subunit/domain	F: PF09670	ECOD (1.6)
B	PF22205	e5fshB1	A: alpha bundles	X: CRISPR/Cas system-associated protein Csm6 6H domain (From Topology)	H: CRISPR/Cas system-associated protein Csm6 6H domain (From Topology)	T: CRISPR/Cas system-associated protein Csm6 6H domain	F: PF22205	ECOD (1.6)
B	F_UNCLASSIFIED	e5fshB3	A: a/b three-layered sandwiches	X: CARF (CRISPR-associated Rossmann fold) domains (From Topology)	H: CARF (CRISPR-associated Rossmann fold) domains (From Topology)	T: CARF (CRISPR-associated Rossmann fold) domains	F: F_UNCLASSIFIED	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF09670	Csm6 HEPN domain (Cas_Cas02710)	Csm6 HEPN domain	Members of this entry are found, exclusively in the vicinity of CRISPR repeats and other CRISPR-associated (cas) genes, in Methanothermobacter thermautotrophicus (Methanobacterium thermoformicicum), Thermus thermophilus (Deinococcus-Thermus), Chlorof ...	Members of this entry are found, exclusively in the vicinity of CRISPR repeats and other CRISPR-associated (cas) genes, in Methanothermobacter thermautotrophicus (Methanobacterium thermoformicicum), Thermus thermophilus (Deinococcus-Thermus), Chloroflexus aurantiacus (Chloroflexi), and Thermomicrobium roseum (Thermomicrobia). Among its members is Csm6 from Thermus thermophilus, a ssRNA-specific endoribonuclease that provides an auxiliary RNA-targeting interference mechanism in type III-A CRISPR-Cas systems, working together with the RNA- and DNA-targeting endonuclease activities of the Csm effector complex. Csm6 consists of a CARF domain at the N-terminal, a six-helix (6H) central domain and the HEPN domain at the C-terminal, which is represented in this entry [1-3]. This domain forms a dimer that constitutes a composite ribonuclease active site.	Domain
A, B	PF22205	Csm6 6H domain (Csm6_6H)	Csm6 6H domain	This entry represents the six-helix domain (6H) of Csm6 from Thermus termophilus and relates sequences [1]. Csm6 is a ssRNA-specific endoribonuclease that provides an auxiliary RNA-targeting interference mechanism in type III-A CRISPR-Cas systems, wo ...	This entry represents the six-helix domain (6H) of Csm6 from Thermus termophilus and relates sequences [1]. Csm6 is a ssRNA-specific endoribonuclease that provides an auxiliary RNA-targeting interference mechanism in type III-A CRISPR-Cas systems, working together with the RNA- and DNA-targeting endonuclease activities of the Csm effector complex. Csm6 consists of a CARF domain at the N-terminal, a 6H central domain and the HEPN domain (Pfam:PF09670) at the C-terminal [1-3].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	CSM6	endonuclease activity nuclease activity hydrolase activity, acting on ester bonds hydrolase activity catalytic activity	biological process involved in interspecies interaction between organisms response to stimulus response to other organism defense response defense response to symbiont response to external stimulus response to biotic stimulus defense response to virus defense response to other organism response to stress response to external biotic stimulus response to virus	-

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 R01GM133198.