Annotations: 2A18

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d2a18a_	Alpha and beta proteins (a+b)	Ferredoxin-like	CcmK-like	CcmK-like	Carboxysome shell protein CcmK4	(Synechocystis sp. PCC 6803 ) [TaxId: 1148 ],	SCOPe (2.08)
B	d2a18b_	Alpha and beta proteins (a+b)	Ferredoxin-like	CcmK-like	CcmK-like	Carboxysome shell protein CcmK4	(Synechocystis sp. PCC 6803 ) [TaxId: 1148 ],	SCOPe (2.08)
C	d2a18c_	Alpha and beta proteins (a+b)	Ferredoxin-like	CcmK-like	CcmK-like	Carboxysome shell protein CcmK4	(Synechocystis sp. PCC 6803 ) [TaxId: 1148 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	CcmK-like	8036519	3001326	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	CcmK-like	8036519	3001326	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	CcmK-like	8036519	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)
A	PF00936	e2a18A1	A: a+b two layers	X: Alpha-beta plaits	H: CcmK-like (From Topology)	T: CcmK-like	F: PF00936	ECOD (1.6)
B	PF00936	e2a18B1	A: a+b two layers	X: Alpha-beta plaits	H: CcmK-like (From Topology)	T: CcmK-like	F: PF00936	ECOD (1.6)
C	PF00936	e2a18C1	A: a+b two layers	X: Alpha-beta plaits	H: CcmK-like (From Topology)	T: CcmK-like	F: PF00936	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.30.70.1710	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits	BMC (bacterial microcompartment) domain	CATH (4.3.0)
B	3.30.70.1710	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits	BMC (bacterial microcompartment) domain	CATH (4.3.0)
C	3.30.70.1710	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits	BMC (bacterial microcompartment) domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C	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
A, B, C	Carbon dioxide concentrating mechanism protein ccmK homolog 4	structural molecule activity structural constituent of carboxysome shell	photosynthesis cellular metabolic process metabolic process cellular process organic substance metabolic process carbon fixation	intracellular organelle bacterial microcompartment intracellular anatomical structure organelle carboxysome intracellular non-membrane-bounded organelle cellular anatomical entity non-membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C	IPR020808	Bacterial microcompartments protein, conserved site	Conserved Site
A, B, C	IPR046380	Carboxysome shell protein CcmK	Family
A, B, C	IPR000249	Bacterial microcompartment domain	Domain
A, B, C	IPR044872	CcmK/CsoS1, bacterial microcompartment domain	Domain
A, B, C	IPR037233	CcmK-like superfamily	Homologous Superfamily

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.