6MUU

Cryo-EM structure of Csm-crRNA binary complex in type III-A CRISPR-Cas system

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
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)
B	SCOP2B Superfamily	Type III-A Csm2-like	8089564	3002163	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	CRISPR-associated proteins	8085899	3001554	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	CRISPR-associated proteins	8085899	3001554	SCOP2B (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	EUF08083	e6muuA4	A: alpha bundles	X: CRISPR RNA silencing complex Cmr2 subunit second helical domain (From Topology)	H: CRISPR RNA silencing complex Cmr2 subunit second helical domain (From Topology)	T: CRISPR RNA silencing complex Cmr2 subunit second helical domain	F: EUF08083	ECOD (1.6)
A	HD	e6muuA5	A: alpha complex topology	X: PDEase-like	H: HD-domain/PDEase-like (From Topology)	T: HD-domain/PDEase-like	F: HD	ECOD (1.6)
A	Cas10_III_2nd	e6muuA3	A: a+b two layers	X: Alpha-beta plaits	H: Adenylyl and guanylyl cyclase catalytic domain-like	T: Adenylyl and guanylyl cyclase catalytic domain-like	F: Cas10_III_2nd	ECOD (1.6)
A	Cas10_III_1st	e6muuA1	A: a+b two layers	X: Alpha-beta plaits	H: Adenylyl and guanylyl cyclase catalytic domain-like	T: Adenylyl and guanylyl cyclase catalytic domain-like	F: Cas10_III_1st	ECOD (1.6)
A	EUF08476	e6muuA2	A: a+b two layers	X: Csm1 ferredoxin-like domain (From Topology)	H: Csm1 ferredoxin-like domain (From Topology)	T: Csm1 ferredoxin-like domain	F: EUF08476	ECOD (1.6)
B	Csm2_III-A	e6muuB1	A: alpha duplicates or obligate multimers	X: Crispr-associated protein Csm2 (From Topology)	H: Crispr-associated protein Csm2 (From Topology)	T: Crispr-associated protein Csm2	F: Csm2_III-A	ECOD (1.6)
C	RAMPs	e6muuC1	A: a+b two layers	X: Alpha-beta plaits	H: Cas7-related	T: CRISPR-associated protein Cas7/Csa2-related	F: RAMPs	ECOD (1.6)
D	RAMPs	e6muuD1	A: a+b two layers	X: Alpha-beta plaits	H: Cas7-related	T: CRISPR-associated protein Cas7/Csa2-related	F: RAMPs	ECOD (1.6)
E	UNK_F_TYPE	e6muuE1	A: a+b two layers	X: Alpha-beta plaits	H: CRISPR transcript (pre-crRNA) processing endoribonuclease-related (From Topology)	T: CRISPR transcript (pre-crRNA) processing endoribonuclease-related	F: UNK_F_TYPE	ECOD (1.6)
F	RAMPs	e6muuF1	A: a+b two layers	X: Alpha-beta plaits	H: CRISPR transcript (pre-crRNA) processing endoribonuclease-related (From Topology)	T: CRISPR transcript (pre-crRNA) processing endoribonuclease-related	F: RAMPs	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF22335	Cas10/Cmr2, second palm domain (Cas10-Cmr2_palm2)	Cas10/Cmr2, second palm domain	This entry represents the second palm domain of Cas10 subunit (named Csm1 in Type III-A and Cmr2 in III-B systems) from type III CRISPR-Cas systems [6]. This domain contains a conserved GGDD motif that is important for DNA polymerase activity [1-5].	Domain
A	PF01966	HD domain (HD)	HD domain	-	Family
A	PF18211	Csm1 subunit domain B (Csm1_B)	Csm1 subunit domain B	This domain is found in the Csm1 subunit of the Csm complex found in Thermococcus onnurineus. Csm is a type III-A CRISPR-Cas system, which is an RNA-guided immune defense mechanism that detects and destroys foreign DNA or RNA. This domain is known as ...	This domain is found in the Csm1 subunit of the Csm complex found in Thermococcus onnurineus. Csm is a type III-A CRISPR-Cas system, which is an RNA-guided immune defense mechanism that detects and destroys foreign DNA or RNA. This domain is known as domain A and is positioned side by side with domain C. Both domain A and domain C adopt the BABBA topology. Domain A interacts primarily with domain B [1].	Domain
B	PF03750	Csm2 Type III-A (Csm2_III-A)	Csm2 Type III-A	-	Family
C, D	PF03787	RAMP superfamily (RAMPs)	RAMP superfamily	-	Family
F	PF03787	RAMP superfamily (RAMPs)	RAMP superfamily	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Uncharacterized protein Csm1	nuclease activity hydrolase activity, acting on ester bonds hydrolase activity exonuclease activity catalytic activity binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding nuclease activity hydrolase activity, acting on ester bonds hydrolase activity exonuclease activity catalytic activity binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding endonuclease activity transferase activity identical protein binding protein binding	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	-
B	Uncharacterized protein Csm2	RNA binding binding organic cyclic compound binding nucleic acid binding	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	-
C, D	Uncharacterized protein Csm3	endonuclease activity nuclease activity hydrolase activity, acting on ester bonds hydrolase activity catalytic activity RNA binding binding organic cyclic compound binding nucleic acid binding	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	-
E	Uncharacterized protein Csm4	RNA binding binding organic cyclic compound binding nucleic acid binding	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	-
F	Uncharacterized protein Csm5	RNA binding binding organic cyclic compound binding nucleic acid binding	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	-
G	RNA (25-MER)	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR000160	GGDEF domain	Domain
A	IPR013408	CRISPR system single-strand-specific deoxyribonuclease Cas10/Csm1	Family
A	IPR052117	CRISPR-associated Cas10/Csm1 subtype III-A protein	Family
A	IPR041062	Csm1, subunit domain B	Domain
A	IPR043128	Reverse transcriptase/Diguanylate cyclase domain	Homologous Superfamily
A	IPR006674	HD domain	Domain
B	IPR010149	CRISPR-associated protein, Csm2 Type III-A	Family
C, D	IPR052216	CRISPR-associated Csm3 endoribonuclease	Family
C, D	IPR005537	CRISPR type III-associated protein	Family
C, D	IPR013412	CRISPR-associated RAMP Csm3	Family
E	IPR005510	CRISPR type III-associated RAMP protein Csm4	Family
F	IPR005537	CRISPR type III-associated protein	Family
F	IPR010173	CRISPR-associated protein Csm5	Family

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 R01GM157729.