Annotations: 9IV3

Crystal structure of CcmS-CcmK1 complex from Synechocystis sp. PCC 6803

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	CcmK-like	8081348	3001326	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	CcmK-like	8081348	3001326	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	CcmK-like	8081348	3001326	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	CcmK-like	8081348	3001326	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	CcmK-like	8081348	3001326	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	CcmK-like	8081348	3001326	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)
B	Beta-Casp	e9iv3B1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: Beta-Casp	ECOD (v294.2)
C	Beta-Casp	e9iv3C1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: Beta-Casp	ECOD (v294.2)
D	Beta-Casp	e9iv3D1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: Beta-Casp	ECOD (v294.2)
E	Beta-Casp	e9iv3E1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: Beta-Casp	ECOD (v294.2)
F	Beta-Casp	e9iv3F1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: Beta-Casp	ECOD (v294.2)
A	FLIC_barrel	e9iv3A01	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: FLIC_barrel	ECOD (v294.2)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
G, H	PF26619	Chaperone protein CcmS (CcmS)	Chaperone protein CcmS	This entry represents the chaperone protein CcmS, which is involved in beta-carboxysome assembly and interacts with beta-carboxysome proteins. CcmS specifically interacts with the C-terminal extension of the carboxysome shell protein CcmK1 [1,2]. Upo ...	This entry represents the chaperone protein CcmS, which is involved in beta-carboxysome assembly and interacts with beta-carboxysome proteins. CcmS specifically interacts with the C-terminal extension of the carboxysome shell protein CcmK1 [1,2]. Upon binding to CcmS, this C-terminal segment of CcmK1 folds into an amphipathic alpha-helix protruding outward and likely functions as a hinge to crosslink adjacent CcmK1-4 hexamers, thereby facilitating precise assembly of the beta-carboxysome shell [2].	Domain
A, B, C, D, E A, B, C, D, E, F	PF00936	BMC domain (BMC)	BMC domain	Bacterial microcompartments are primitive organelles composed entirely of protein subunits. The prototypical bacterial microcompartment is the carboxysome, a protein shell for sequestering carbon fixation reactions. These proteins for hexameric struc ...	Bacterial microcompartments are primitive organelles composed entirely of protein subunits. The prototypical bacterial microcompartment is the carboxysome, a protein shell for sequestering carbon fixation reactions. These proteins for hexameric structure [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
G, H	Slr1911 protein	-	-	-
A, B, C, D, E A, B, C, D, E, F	Carboxysome shell protein CcmK1	structural molecule activity structural constituent of carboxysome shell	photosynthesis metabolic process cellular process carbon fixation	intracellular organelle bacterial microcompartment cellular anatomical structure intracellular anatomical structure organelle carboxysome membraneless organelle intracellular membraneless organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
G, H	IPR058587	Chaperone protein CcmS	Domain
A, B, C, D, E A, B, C, D, E, F	IPR020808	Bacterial microcompartments protein, conserved site	Conserved Site
A, B, C, D, E A, B, C, D, E, F	IPR046380	Carboxysome shell protein CcmK	Family
A, B, C, D, E A, B, C, D, E, F	IPR000249	Bacterial microcompartment domain	Domain
A, B, C, D, E A, B, C, D, E, F	IPR050575	Bacterial microcompartment shell	Family
A, B, C, D, E A, B, C, D, E, F	IPR044872	CcmK/CsoS1, bacterial microcompartment domain	Domain
A, B, C, D, E A, B, C, D, E, F	IPR037233	CcmK-like superfamily	Homologous Superfamily

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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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.