4KT0

Crystal structure of a virus like photosystem I from the cyanobacterium Synechocystis PCC 6803

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d4kt0a_	Membrane and cell surface proteins and peptides	Photosystem I subunits PsaA/PsaB	Photosystem I subunits PsaA/PsaB	Photosystem I subunits PsaA/PsaB	automated matches	(Synechocystis sp. PCC 6803 ) [TaxId: 1148 ],	SCOPe (2.08)
B	d4kt0b_	Membrane and cell surface proteins and peptides	Photosystem I subunits PsaA/PsaB	Photosystem I subunits PsaA/PsaB	Photosystem I subunits PsaA/PsaB	automated matches	(Synechocystis sp. PCC 6803 ) [TaxId: 1148 ],	SCOPe (2.08)
C	d4kt0c_	Alpha and beta proteins (a+b)	Ferredoxin-like	4Fe-4S ferredoxins	7-Fe ferredoxin	automated matches	(Synechocystis sp. PCC 6803 ) [TaxId: 1148 ],	SCOPe (2.08)
D	d4kt0d_	Alpha and beta proteins (a+b)	Photosystem I subunit PsaD	Photosystem I subunit PsaD	Photosystem I subunit PsaD	automated matches	(Synechocystis sp. PCC 6803 ) [TaxId: 1148 ],	SCOPe (2.08)
E	d4kt0e_	All beta proteins	SH3-like barrel	Electron transport accessory proteins	Photosystem I accessory protein E (PsaE)	Photosystem I accessory protein E (PsaE)	(Synechocystis sp. PCC 6803 ) [TaxId: 1148 ],	SCOPe (2.08)
F	d4kt0f_	Membrane and cell surface proteins and peptides	Single transmembrane helix	Subunit III of photosystem I reaction centre, PsaF	Subunit III of photosystem I reaction centre, PsaF	automated matches	(Synechocystis sp. PCC 6803 ) [TaxId: 1148 ],	SCOPe (2.08)
G [auth J]	d4kt0j_	Membrane and cell surface proteins and peptides	Single transmembrane helix	Subunit IX of photosystem I reaction centre, PsaJ	Subunit IX of photosystem I reaction centre, PsaJ	automated matches	(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	Photosystem I subunits PsaA/PsaB	8074454	3000850	SCOP2B (2022-06-29)
B	SCOP2 Family	Photosystem I subunits PsaA/PsaB	8074461	4002118	SCOP2 (2022-06-29)
B	SCOP2 Superfamily	Photosystem I subunits PsaA/PsaB	8074462	3000850	SCOP2 (2022-06-29)
D	SCOP2B Superfamily	Photosystem I subunit PsaD	8074480	3000951	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	Electron transport accessory proteins	8044474	3000325	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	Subunit III of photosystem I reaction centre, PsaF	8074438	3000813	SCOP2B (2022-06-29)
G [auth J]	SCOP2 Family	Subunit IX of photosystem I reaction centre, PsaJ	8074511	4002101	SCOP2 (2022-06-29)
G [auth J]	SCOP2 Superfamily	Subunit IX of photosystem I reaction centre, PsaJ	8074512	3000824	SCOP2 (2022-06-29)
I [auth M]	SCOP2B Superfamily	Subunit XII of photosystem I reaction centre, PsaM	8074450	3000829	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	PsaA_PsaB_C	e4kt0A1	A: alpha bundles	X: Bacterial photosystem II reaction centre L and M subunits-like (From Topology)	H: Bacterial photosystem II reaction centre L and M subunits-like (From Topology)	T: Bacterial photosystem II reaction centre L and M subunits-like	F: PsaA_PsaB_C	ECOD (1.6)
A	PsaA_PsaB_N	e4kt0A2	A: alpha bundles	X: Photosystem II antenna protein-like (From Topology)	H: Photosystem II antenna protein-like (From Topology)	T: Photosystem II antenna protein-like	F: PsaA_PsaB_N	ECOD (1.6)
B	PsaA_PsaB_C	e4kt0B1	A: alpha bundles	X: Bacterial photosystem II reaction centre L and M subunits-like (From Topology)	H: Bacterial photosystem II reaction centre L and M subunits-like (From Topology)	T: Bacterial photosystem II reaction centre L and M subunits-like	F: PsaA_PsaB_C	ECOD (1.6)
B	PsaA_PsaB_N	e4kt0B2	A: alpha bundles	X: Photosystem II antenna protein-like (From Topology)	H: Photosystem II antenna protein-like (From Topology)	T: Photosystem II antenna protein-like	F: PsaA_PsaB_N	ECOD (1.6)
C	Fer4_21_1	e4kt0C1	A: a+b two layers	X: 4Fe-4S ferredoxin (From Topology)	H: 4Fe-4S ferredoxin (From Topology)	T: 4Fe-4S ferredoxin	F: Fer4_21_1	ECOD (1.6)
D	PsaD	e4kt0D1	A: a+b two layers	X: Photosystem I subunit PsaD (From Topology)	H: Photosystem I subunit PsaD (From Topology)	T: Photosystem I subunit PsaD	F: PsaD	ECOD (1.6)
E	PSI_PsaE	e4kt0E1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: PSI_PsaE	ECOD (1.6)
F	PSI_PsaF	e4kt0F1	A: extended segments	X: Subunit III of photosystem I reaction centre, PsaF (From Topology)	H: Subunit III of photosystem I reaction centre, PsaF (From Topology)	T: Subunit III of photosystem I reaction centre, PsaF	F: PSI_PsaF	ECOD (1.6)
G [auth J]	PSI_PsaJ	e4kt0J1	A: extended segments	X: Subunit IX of photosystem I reaction centre, PsaJ (From Topology)	H: Subunit IX of photosystem I reaction centre, PsaJ (From Topology)	T: Subunit IX of photosystem I reaction centre, PsaJ	F: PSI_PsaJ	ECOD (1.6)
H [auth K]	PSI_PSAK	e4kt0K1	A: alpha bundles	X: Photosystem I reaction center subunit X, PsaK (From Topology)	H: Photosystem I reaction center subunit X, PsaK (From Topology)	T: Photosystem I reaction center subunit X, PsaK	F: PSI_PSAK	ECOD (1.6)
I [auth M]	PsaM	e4kt0M1	A: extended segments	X: Subunit XII of photosystem I reaction centre, PsaM (From Topology)	H: Subunit XII of photosystem I reaction centre, PsaM (From Topology)	T: Subunit XII of photosystem I reaction centre, PsaM	F: PsaM	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.20.1130.10	Mainly Alpha	Up-down Bundle	Photosystem I p700 chlorophyll A apoprotein A1	Photosystem I PsaA/PsaB	CATH (4.3.0)
B	1.20.1130.10	Mainly Alpha	Up-down Bundle	Photosystem I p700 chlorophyll A apoprotein A1	Photosystem I PsaA/PsaB	CATH (4.3.0)
C	3.30.70.20	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits		CATH (4.3.0)
D	3.30.1470.10	Alpha Beta	2-Layer Sandwich	Photosystem 1 Reaction Centre Subunit Ii	Chain: D	CATH (4.3.0)
E	2.30.30.50	Mainly Beta	Roll	SH3 type barrels.		CATH (4.3.0)
F	1.10.8.110	Mainly Alpha	Orthogonal Bundle	Helicase, Ruva Protein	domain 3	CATH (4.3.0)
G [auth J]	1.20.5.510	Mainly Alpha	Up-down Bundle	Single alpha-helices involved in coiled-coils or other helix-helix interfaces	Single helix bin	CATH (4.3.0)
H [auth K]	1.20.860.20	Mainly Alpha	Up-down Bundle	Alpha-t-alpha	Photosystem I PsaK, reaction centre	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00223	Photosystem I psaA/psaB protein (PsaA_PsaB)	Photosystem I psaA/psaB protein	-	Family
B	PF00223	Photosystem I psaA/psaB protein (PsaA_PsaB)	Photosystem I psaA/psaB protein	-	Family
C	PF12838	4Fe-4S dicluster domain (Fer4_7)	4Fe-4S dicluster domain	Superfamily includes proteins containing domains which bind to iron-sulfur clusters. Members include bacterial ferredoxins, various dehydrogenases, and various reductases. Structure of the domain is an alpha-antiparallel beta sandwich. Domain contai ...	Superfamily includes proteins containing domains which bind to iron-sulfur clusters. Members include bacterial ferredoxins, various dehydrogenases, and various reductases. Structure of the domain is an alpha-antiparallel beta sandwich. Domain contains two 4Fe4S clusters.	Domain
D	PF02531	PsaD (PsaD)	PsaD	-	Family
E	PF02427	Photosystem I reaction centre subunit IV / PsaE (PSI_PsaE)	Photosystem I reaction centre subunit IV / PsaE	PsaE is a 69 amino acid polypeptide from photosystem I present on the stromal side of the thylakoid membrane [1]. The structure is comprised of a well-defined five-stranded beta-sheet similar to SH3 domains [1].	Domain
F	PF02507	Photosystem I reaction centre subunit III (PSI_PsaF)	Photosystem I reaction centre subunit III	-	Family
G [auth J]	PF01701	Photosystem I reaction centre subunit IX / PsaJ (PSI_PsaJ)	Photosystem I reaction centre subunit IX / PsaJ	-	Family
H [auth K]	PF01241	Photosystem I psaG / psaK (PSI_PSAK)	Photosystem I psaG / psaK	-	Family
I [auth M]	PF07465	Photosystem I protein M (PsaM) (PsaM)	Photosystem I protein M (PsaM)	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Photosystem I P700 chlorophyll a apoprotein A1	cation binding magnesium ion binding ion binding binding metal ion binding small molecule binding oxidoreductase activity catalytic activity chlorophyll binding organic cyclic compound binding tetrapyrrole binding iron-sulfur cluster binding 4 iron, 4 sulfur cluster binding metal cluster binding cation binding magnesium ion binding ion binding binding metal ion binding small molecule binding oxidoreductase activity catalytic activity chlorophyll binding organic cyclic compound binding tetrapyrrole binding iron-sulfur cluster binding 4 iron, 4 sulfur cluster binding metal cluster binding electron transfer activity	photosynthesis cellular metabolic process metabolic process cellular process	intracellular anatomical structure plasma membrane-derived chromatophore membrane membrane plasma membrane plasma membrane-derived chromatophore cellular anatomical entity thylakoid membrane intracellular organelle cell periphery plasma membrane-derived thylakoid membrane organelle intracellular non-membrane-bounded organelle plasma membrane region bacterial thylakoid intracellular anatomical structure plasma membrane-derived chromatophore membrane membrane plasma membrane plasma membrane-derived chromatophore cellular anatomical entity thylakoid membrane intracellular organelle cell periphery plasma membrane-derived thylakoid membrane organelle intracellular non-membrane-bounded organelle plasma membrane region bacterial thylakoid cytoplasm photosynthetic membrane thylakoid non-membrane-bounded organelle protein-containing complex photosystem photosystem I membrane protein complex
B	Photosystem I P700 chlorophyll a apoprotein A2	cation binding magnesium ion binding ion binding binding metal ion binding small molecule binding oxidoreductase activity catalytic activity chlorophyll binding organic cyclic compound binding tetrapyrrole binding iron-sulfur cluster binding 4 iron, 4 sulfur cluster binding metal cluster binding cation binding magnesium ion binding ion binding binding metal ion binding small molecule binding oxidoreductase activity catalytic activity chlorophyll binding organic cyclic compound binding tetrapyrrole binding iron-sulfur cluster binding 4 iron, 4 sulfur cluster binding metal cluster binding electron transfer activity	photosynthesis cellular metabolic process metabolic process cellular process	intracellular anatomical structure plasma membrane-derived chromatophore membrane membrane plasma membrane plasma membrane-derived chromatophore cellular anatomical entity thylakoid membrane intracellular organelle cell periphery plasma membrane-derived thylakoid membrane organelle intracellular non-membrane-bounded organelle plasma membrane region bacterial thylakoid intracellular anatomical structure plasma membrane-derived chromatophore membrane membrane plasma membrane plasma membrane-derived chromatophore cellular anatomical entity thylakoid membrane intracellular organelle cell periphery plasma membrane-derived thylakoid membrane organelle intracellular non-membrane-bounded organelle plasma membrane region bacterial thylakoid cytoplasm photosynthetic membrane thylakoid non-membrane-bounded organelle protein-containing complex photosystem photosystem I membrane protein complex
C	Photosystem I iron-sulfur center	oxidoreductase activity catalytic activity iron-sulfur cluster binding binding 4 iron, 4 sulfur cluster binding metal cluster binding small molecule binding electron transfer activity cation binding ion binding metal ion binding	photosynthesis photosynthesis, light reaction photosynthetic electron transport chain cellular metabolic process electron transport chain metabolic process cellular process generation of precursor metabolites and energy photosynthetic electron transport in photosystem I	intracellular anatomical structure plasma membrane-derived chromatophore membrane membrane plasma membrane plasma membrane-derived chromatophore cellular anatomical entity thylakoid membrane intracellular organelle cell periphery plasma membrane-derived thylakoid membrane organelle intracellular non-membrane-bounded organelle plasma membrane region bacterial thylakoid intracellular anatomical structure plasma membrane-derived chromatophore membrane membrane plasma membrane plasma membrane-derived chromatophore cellular anatomical entity thylakoid membrane intracellular organelle cell periphery plasma membrane-derived thylakoid membrane organelle intracellular non-membrane-bounded organelle plasma membrane region bacterial thylakoid cytoplasm photosynthetic membrane thylakoid non-membrane-bounded organelle protein-containing complex photosystem photosystem I membrane protein complex
D	Photosystem I subunit II	-	photosynthesis cellular metabolic process metabolic process cellular process	protein-containing complex photosystem intracellular anatomical structure photosystem I membrane membrane protein complex cellular anatomical entity intracellular organelle organelle intracellular non-membrane-bounded organelle photosynthetic membrane photosystem I reaction center thylakoid non-membrane-bounded organelle protein-containing complex photosystem intracellular anatomical structure photosystem I membrane membrane protein complex cellular anatomical entity intracellular organelle organelle intracellular non-membrane-bounded organelle photosynthetic membrane photosystem I reaction center thylakoid non-membrane-bounded organelle cell periphery plasma membrane
E	Photosystem I reaction center subunit IV	-	photosynthesis cellular metabolic process metabolic process cellular process	intracellular anatomical structure plasma membrane-derived chromatophore membrane membrane plasma membrane plasma membrane-derived chromatophore cellular anatomical entity thylakoid membrane intracellular organelle cell periphery plasma membrane-derived thylakoid membrane organelle intracellular non-membrane-bounded organelle plasma membrane region bacterial thylakoid intracellular anatomical structure plasma membrane-derived chromatophore membrane membrane plasma membrane plasma membrane-derived chromatophore cellular anatomical entity thylakoid membrane intracellular organelle cell periphery plasma membrane-derived thylakoid membrane organelle intracellular non-membrane-bounded organelle plasma membrane region bacterial thylakoid cytoplasm photosynthetic membrane thylakoid non-membrane-bounded organelle protein-containing complex photosystem photosystem I membrane protein complex photosystem I reaction center
F	Photosystem I subunit III	-	photosynthesis cellular metabolic process metabolic process cellular process	protein-containing complex photosystem intracellular anatomical structure photosystem I membrane membrane protein complex cellular anatomical entity intracellular organelle organelle intracellular non-membrane-bounded organelle photosynthetic membrane photosystem I reaction center thylakoid non-membrane-bounded organelle protein-containing complex photosystem intracellular anatomical structure photosystem I membrane membrane protein complex cellular anatomical entity intracellular organelle organelle intracellular non-membrane-bounded organelle photosynthetic membrane photosystem I reaction center thylakoid non-membrane-bounded organelle cell periphery plasma membrane
G [auth J]	Photosystem I reaction center subunit IX	-	photosynthesis cellular metabolic process metabolic process cellular process	intracellular anatomical structure plasma membrane-derived chromatophore membrane membrane plasma membrane plasma membrane-derived chromatophore cellular anatomical entity thylakoid membrane intracellular organelle cell periphery plasma membrane-derived thylakoid membrane organelle intracellular non-membrane-bounded organelle plasma membrane region bacterial thylakoid intracellular anatomical structure plasma membrane-derived chromatophore membrane membrane plasma membrane plasma membrane-derived chromatophore cellular anatomical entity thylakoid membrane intracellular organelle cell periphery plasma membrane-derived thylakoid membrane organelle intracellular non-membrane-bounded organelle plasma membrane region bacterial thylakoid cytoplasm photosynthetic membrane thylakoid non-membrane-bounded organelle protein-containing complex photosystem photosystem I membrane protein complex
H [auth K]	Photosystem I reaction center subunit PsaK	-	photosynthesis cellular metabolic process metabolic process cellular process	intracellular anatomical structure plasma membrane-derived chromatophore membrane membrane plasma membrane plasma membrane-derived chromatophore cellular anatomical entity thylakoid membrane intracellular organelle cell periphery plasma membrane-derived thylakoid membrane organelle intracellular non-membrane-bounded organelle plasma membrane region bacterial thylakoid intracellular anatomical structure plasma membrane-derived chromatophore membrane membrane plasma membrane plasma membrane-derived chromatophore cellular anatomical entity thylakoid membrane intracellular organelle cell periphery plasma membrane-derived thylakoid membrane organelle intracellular non-membrane-bounded organelle plasma membrane region bacterial thylakoid cytoplasm photosynthetic membrane thylakoid non-membrane-bounded organelle protein-containing complex photosystem photosystem I membrane protein complex
I [auth M]	Photosystem I reaction center subunit XII	-	photosynthesis cellular metabolic process metabolic process cellular process	intracellular anatomical structure plasma membrane-derived chromatophore membrane membrane plasma membrane plasma membrane-derived chromatophore cellular anatomical entity thylakoid membrane intracellular organelle cell periphery plasma membrane-derived thylakoid membrane organelle intracellular non-membrane-bounded organelle plasma membrane region bacterial thylakoid intracellular anatomical structure plasma membrane-derived chromatophore membrane membrane plasma membrane plasma membrane-derived chromatophore cellular anatomical entity thylakoid membrane intracellular organelle cell periphery plasma membrane-derived thylakoid membrane organelle intracellular non-membrane-bounded organelle plasma membrane region bacterial thylakoid cytoplasm photosynthetic membrane thylakoid non-membrane-bounded organelle protein-containing complex photosystem photosystem I membrane protein complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR036408	Photosystem I PsaA/PsaB superfamily	Homologous Superfamily
A	IPR001280	Photosystem I PsaA/PsaB	Family
A	IPR006243	Photosystem I PsaA	Family
A	IPR020586	Photosystem I PsaA/PsaB, conserved site	Conserved Site
B	IPR036408	Photosystem I PsaA/PsaB superfamily	Homologous Superfamily
B	IPR001280	Photosystem I PsaA/PsaB	Family
B	IPR006244	Photosystem I PsaB	Family
B	IPR020586	Photosystem I PsaA/PsaB, conserved site	Conserved Site
C	IPR017900	4Fe-4S ferredoxin, iron-sulphur binding, conserved site	Conserved Site
C	IPR050157	Photosystem I iron-sulfur center	Family
C	IPR017896	4Fe-4S ferredoxin-type, iron-sulphur binding domain	Domain
C	IPR017491	Photosystem I protein PsaC	Family
D	IPR003685	Photosystem I PsaD	Family
D	IPR036579	Photosystem I, reaction centre subunit PsaD superfamily	Homologous Superfamily
E	IPR008990	Electron transport accessory-like domain superfamily	Homologous Superfamily
E	IPR003375	Photosystem I PsaE, reaction centre subunit IV	Family
F	IPR036577	Photosystem I PsaF, reaction centre subunit III superfamily	Homologous Superfamily
F	IPR003666	Photosystem I PsaF, reaction centre subunit III	Family
G [auth J]	IPR002615	Photosystem I PsaJ, reaction centre subunit IX	Family
G [auth J]	IPR036062	Photosystem I PsaJ, reaction centre subunit IX superfamily	Homologous Superfamily
H [auth K]	IPR037101	Photosystem I reaction centre subunit PsaK	Homologous Superfamily
H [auth K]	IPR000549	Photosystem I reaction center subunit V/PsaK	Family
H [auth K]	IPR035982	Photosystem I reaction centre subunit PsaK superfamily	Homologous Superfamily
H [auth K]	IPR017492	Photosystem I reaction center subunit PsaK	Family
I [auth M]	IPR010010	Photosystem I PsaM, reaction centre	Family
I [auth M]	IPR037279	Photosystem I PsaM, reaction centre superfamily	Homologous Superfamily