7F4V

Cryo-EM structure of a primordial cyanobacterial photosystem I

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Membrane Protein Annotation: OPM
Membrane Protein Annotation: mpstruc

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A [auth aA]	SCOP2 Family	Photosystem I subunits PsaA/PsaB	8107297	4002118	SCOP2 (2022-06-29)
A [auth aA]	SCOP2 Superfamily	Photosystem I subunits PsaA/PsaB	8107298	3000850	SCOP2 (2022-06-29)
K [auth bA]	SCOP2B Superfamily	Photosystem I subunits PsaA/PsaB	8107298	3000850	SCOP2B (2022-06-29)
U [auth cA]	SCOP2B Superfamily	Photosystem I subunits PsaA/PsaB	8107298	3000850	SCOP2B (2022-06-29)
B [auth aB]	SCOP2B Superfamily	Photosystem I subunits PsaA/PsaB	8107296	3000850	SCOP2B (2022-06-29)
L [auth bB]	SCOP2B Superfamily	Photosystem I subunits PsaA/PsaB	8107296	3000850	SCOP2B (2022-06-29)
V [auth cB]	SCOP2 Family	Photosystem I subunits PsaA/PsaB	8107295	4002118	SCOP2 (2022-06-29)
V [auth cB]	SCOP2 Superfamily	Photosystem I subunits PsaA/PsaB	8107296	3000850	SCOP2 (2022-06-29)
C [auth aC]	SCOP2B Superfamily	4Fe-4S ferredoxins	8107302	3000020	SCOP2B (2022-06-29)
M [auth bC]	SCOP2 Family	7-Fe ferredoxin	8107301	4001227	SCOP2 (2022-06-29)
M [auth bC]	SCOP2 Superfamily	4Fe-4S ferredoxins	8107302	3000020	SCOP2 (2022-06-29)
W [auth cC]	SCOP2B Superfamily	4Fe-4S ferredoxins	8107302	3000020	SCOP2B (2022-06-29)
D [auth aD]	SCOP2 Family	Photosystem I subunit PsaD	8107293	4003498	SCOP2 (2022-06-29)
D [auth aD]	SCOP2 Superfamily	Photosystem I subunit PsaD	8107294	3000951	SCOP2 (2022-06-29)
N [auth bD]	SCOP2B Superfamily	Photosystem I subunit PsaD	8107294	3000951	SCOP2B (2022-06-29)
X [auth cD]	SCOP2B Superfamily	Photosystem I subunit PsaD	8107294	3000951	SCOP2B (2022-06-29)
E [auth aE]	SCOP2 Family	Photosystem I accessory protein E (PsaE)	8107299	4001749	SCOP2 (2022-06-29)
E [auth aE]	SCOP2 Superfamily	Electron transport accessory proteins	8107300	3000325	SCOP2 (2022-06-29)
O [auth bE]	SCOP2B Superfamily	Electron transport accessory proteins	8107300	3000325	SCOP2B (2022-06-29)
Y [auth cE]	SCOP2B Superfamily	Electron transport accessory proteins	8107300	3000325	SCOP2B (2022-06-29)
F [auth aF]	SCOP2B Superfamily	Subunit III of photosystem I reaction centre PsaF	8107304	3000813	SCOP2B (2022-06-29)
P [auth bF]	SCOP2B Superfamily	Subunit III of photosystem I reaction centre PsaF	8107304	3000813	SCOP2B (2022-06-29)
Z [auth cF]	SCOP2 Family	Subunit III of photosystem I reaction centre PsaF	8107303	4002091	SCOP2 (2022-06-29)
Z [auth cF]	SCOP2 Superfamily	Subunit III of photosystem I reaction centre PsaF	8107304	3000813	SCOP2 (2022-06-29)
CA [auth cL]	SCOP2B Superfamily	Photosystem I reaction center subunit XI PsaL	8107306	3000870	SCOP2B (2022-06-29)
I [auth aL]	SCOP2 Family	Photosystem I reaction center subunit XI PsaL	8107305	4002135	SCOP2 (2022-06-29)
I [auth aL]	SCOP2 Superfamily	Photosystem I reaction center subunit XI PsaL	8107306	3000870	SCOP2 (2022-06-29)
S [auth bL]	SCOP2B Superfamily	Photosystem I reaction center subunit XI PsaL	8107306	3000870	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 [auth aA]	PF00223	e7f4vaA1	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: PF00223	ECOD (1.6)
A [auth aA]	PF00223	e7f4vaA2	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: PF00223	ECOD (1.6)
K [auth bA]	PF00223	e7f4vbA1	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: PF00223	ECOD (1.6)
K [auth bA]	PF00223	e7f4vbA2	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: PF00223	ECOD (1.6)
U [auth cA]	PF00223	e7f4vcA1	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: PF00223	ECOD (1.6)
U [auth cA]	PF00223	e7f4vcA2	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: PF00223	ECOD (1.6)
DA [auth cM]	PF07465	e7f4vcM1	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: PF07465	ECOD (1.6)
J [auth aM]	PF07465	e7f4vaM1	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: PF07465	ECOD (1.6)
T [auth bM]	PF07465	e7f4vbM1	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: PF07465	ECOD (1.6)
B [auth aB]	PF00223	e7f4vaB1	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: PF00223	ECOD (1.6)
B [auth aB]	PF00223	e7f4vaB2	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: PF00223	ECOD (1.6)
L [auth bB]	PF00223	e7f4vbB1	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: PF00223	ECOD (1.6)
L [auth bB]	PF00223	e7f4vbB2	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: PF00223	ECOD (1.6)
V [auth cB]	PF00223	e7f4vcB1	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: PF00223	ECOD (1.6)
V [auth cB]	PF00223	e7f4vcB2	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: PF00223	ECOD (1.6)
C [auth aC]	PF00037	e7f4vaC1	A: a+b two layers	X: 4Fe-4S ferredoxin (From Topology)	H: 4Fe-4S ferredoxin (From Topology)	T: 4Fe-4S ferredoxin	F: PF00037	ECOD (1.6)
M [auth bC]	PF00037	e7f4vbC1	A: a+b two layers	X: 4Fe-4S ferredoxin (From Topology)	H: 4Fe-4S ferredoxin (From Topology)	T: 4Fe-4S ferredoxin	F: PF00037	ECOD (1.6)
W [auth cC]	PF00037	e7f4vcC1	A: a+b two layers	X: 4Fe-4S ferredoxin (From Topology)	H: 4Fe-4S ferredoxin (From Topology)	T: 4Fe-4S ferredoxin	F: PF00037	ECOD (1.6)
D [auth aD]	PF02531	e7f4vaD1	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: PF02531	ECOD (1.6)
N [auth bD]	PF02531	e7f4vbD1	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: PF02531	ECOD (1.6)
X [auth cD]	PF02531	e7f4vcD1	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: PF02531	ECOD (1.6)
E [auth aE]	PF02427	e7f4vaE1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: PF02427	ECOD (1.6)
O [auth bE]	PF02427	e7f4vbE1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: PF02427	ECOD (1.6)
Y [auth cE]	PF02427	e7f4vcE1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: PF02427	ECOD (1.6)
F [auth aF]	PF02507	e7f4vaF1	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: PF02507	ECOD (1.6)
P [auth bF]	PF02507	e7f4vbF1	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: PF02507	ECOD (1.6)
Z [auth cF]	PF02507	e7f4vcF1	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: PF02507	ECOD (1.6)
AA [auth cI]	F_UNCLASSIFIED	e7f4vcI1	A: extended segments	X: Subunit VIII of photosystem I reaction centre, PsaI (From Topology)	H: Subunit VIII of photosystem I reaction centre, PsaI (From Topology)	T: Subunit VIII of photosystem I reaction centre, PsaI	F: F_UNCLASSIFIED	ECOD (1.6)
G [auth aI]	F_UNCLASSIFIED	e7f4vaI1	A: extended segments	X: Subunit VIII of photosystem I reaction centre, PsaI (From Topology)	H: Subunit VIII of photosystem I reaction centre, PsaI (From Topology)	T: Subunit VIII of photosystem I reaction centre, PsaI	F: F_UNCLASSIFIED	ECOD (1.6)
Q [auth bI]	F_UNCLASSIFIED	e7f4vbI1	A: extended segments	X: Subunit VIII of photosystem I reaction centre, PsaI (From Topology)	H: Subunit VIII of photosystem I reaction centre, PsaI (From Topology)	T: Subunit VIII of photosystem I reaction centre, PsaI	F: F_UNCLASSIFIED	ECOD (1.6)
CA [auth cL]	PF02605	e7f4vcL1	A: alpha bundles	X: Photosystem I reaction center subunit XI, PsaL (From Topology)	H: Photosystem I reaction center subunit XI, PsaL (From Topology)	T: Photosystem I reaction center subunit XI, PsaL	F: PF02605	ECOD (1.6)
I [auth aL]	PF02605	e7f4vaL1	A: alpha bundles	X: Photosystem I reaction center subunit XI, PsaL (From Topology)	H: Photosystem I reaction center subunit XI, PsaL (From Topology)	T: Photosystem I reaction center subunit XI, PsaL	F: PF02605	ECOD (1.6)
S [auth bL]	PF02605	e7f4vbL1	A: alpha bundles	X: Photosystem I reaction center subunit XI, PsaL (From Topology)	H: Photosystem I reaction center subunit XI, PsaL (From Topology)	T: Photosystem I reaction center subunit XI, PsaL	F: PF02605	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth aA], K [auth bA], U [auth cA]	PF00223	Photosystem I psaA/psaB protein (PsaA_PsaB)	Photosystem I psaA/psaB protein	-	Family
DA [auth cM], J [auth aM], T [auth bM]	PF07465	Photosystem I protein M (PsaM) (PsaM)	Photosystem I protein M (PsaM)	-	Family
B [auth aB], L [auth bB], V [auth cB]	PF00223	Photosystem I psaA/psaB protein (PsaA_PsaB)	Photosystem I psaA/psaB protein	-	Family
C [auth aC], M [auth bC], W [auth cC]	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 [auth aD], N [auth bD], X [auth cD]	PF02531	PsaD (PsaD)	PsaD	-	Family
E [auth aE], O [auth bE], Y [auth cE]	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 [auth aF], P [auth bF], Z [auth cF]	PF02507	Photosystem I reaction centre subunit III (PSI_PsaF)	Photosystem I reaction centre subunit III	-	Family
CA [auth cL], I [auth aL], S [auth bL]	PF02605	Photosystem I reaction centre subunit XI (PsaL)	Photosystem I reaction centre subunit XI	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth aA], K [auth bA], U [auth cA]	Photosystem I P700 chlorophyll a apoprotein A1	cation binding magnesium ion binding ion binding binding metal ion binding small molecule binding iron-sulfur cluster binding 4 iron, 4 sulfur cluster binding metal cluster binding chlorophyll binding organic cyclic compound binding tetrapyrrole binding electron transfer activity	photosynthesis cellular metabolic process metabolic process cellular process	cell periphery plasma membrane membrane cellular anatomical entity protein-containing complex photosystem intracellular anatomical structure photosystem I membrane protein complex intracellular organelle organelle intracellular non-membrane-bounded organelle photosynthetic membrane thylakoid cell periphery plasma membrane membrane cellular anatomical entity protein-containing complex photosystem intracellular anatomical structure photosystem I membrane protein complex intracellular organelle organelle intracellular non-membrane-bounded organelle photosynthetic membrane thylakoid non-membrane-bounded organelle
DA [auth cM], J [auth aM], T [auth bM]	Photosystem I reaction center subunit XII	-	photosynthesis cellular metabolic process metabolic process cellular process	cell periphery plasma membrane membrane cellular anatomical entity protein-containing complex photosystem intracellular anatomical structure photosystem I membrane protein complex intracellular organelle organelle intracellular non-membrane-bounded organelle photosynthetic membrane thylakoid cell periphery plasma membrane membrane cellular anatomical entity protein-containing complex photosystem intracellular anatomical structure photosystem I membrane protein complex intracellular organelle organelle intracellular non-membrane-bounded organelle photosynthetic membrane thylakoid non-membrane-bounded organelle
B [auth aB], L [auth bB], V [auth cB]	Photosystem I P700 chlorophyll a apoprotein A2	oxidoreductase activity catalytic activity chlorophyll binding binding organic cyclic compound binding tetrapyrrole binding iron-sulfur cluster binding 4 iron, 4 sulfur cluster binding metal cluster binding small molecule binding cation binding ion binding metal ion binding	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 thylakoid non-membrane-bounded organelle cell periphery 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 thylakoid non-membrane-bounded organelle cell periphery plasma membrane
C [auth aC], M [auth bC], W [auth cC]	Photosystem I iron-sulfur center	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 organelle intracellular anatomical structure organelle membrane intracellular non-membrane-bounded organelle photosynthetic membrane cellular anatomical entity thylakoid membrane thylakoid non-membrane-bounded organelle cell periphery plasma membrane protein-containing complex photosystem intracellular organelle intracellular anatomical structure organelle membrane intracellular non-membrane-bounded organelle photosynthetic membrane cellular anatomical entity thylakoid membrane thylakoid non-membrane-bounded organelle cell periphery plasma membrane protein-containing complex photosystem photosystem I membrane protein complex
D [auth aD], N [auth bD], X [auth cD]	Photosystem I reaction center 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 [auth aE], O [auth bE], Y [auth cE]	Photosystem I reaction center subunit IV	-	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
F [auth aF], P [auth bF], Z [auth cF]	Photosystem I reaction center 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
AA [auth cI], G [auth aI], Q [auth bI]	Photosystem I reaction center subunit Z	-	photosynthesis cellular metabolic process metabolic process cellular process	cell periphery plasma membrane membrane cellular anatomical entity protein-containing complex photosystem intracellular anatomical structure photosystem I membrane protein complex intracellular organelle organelle intracellular non-membrane-bounded organelle photosynthetic membrane thylakoid cell periphery plasma membrane membrane cellular anatomical entity protein-containing complex photosystem intracellular anatomical structure photosystem I membrane protein complex intracellular organelle organelle intracellular non-membrane-bounded organelle photosynthetic membrane thylakoid non-membrane-bounded organelle
BA [auth cJ], H [auth aJ], R [auth bJ]	Unknown protein	-	-	-
CA [auth cL], I [auth aL], S [auth bL]	Photosystem I reaction center subunit XI	-	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

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth aA], K [auth bA], U [auth cA]	IPR006243	Photosystem I PsaA	Family
A [auth aA], K [auth bA], U [auth cA]	IPR036408	Photosystem I PsaA/PsaB superfamily	Homologous Superfamily
A [auth aA], K [auth bA], U [auth cA]	IPR001280	Photosystem I PsaA/PsaB	Family
A [auth aA], K [auth bA], U [auth cA]	IPR020586	Photosystem I PsaA/PsaB, conserved site	Conserved Site
DA [auth cM], J [auth aM], T [auth bM]	IPR010010	Photosystem I PsaM, reaction centre	Family
B [auth aB], L [auth bB], V [auth cB]	IPR006664	Outer membrane protein, bacterial	Domain
B [auth aB], L [auth bB], V [auth cB]	IPR036408	Photosystem I PsaA/PsaB superfamily	Homologous Superfamily
B [auth aB], L [auth bB], V [auth cB]	IPR001280	Photosystem I PsaA/PsaB	Family
B [auth aB], L [auth bB], V [auth cB]	IPR036737	OmpA-like domain superfamily	Homologous Superfamily
B [auth aB], L [auth bB], V [auth cB]	IPR006665	OmpA-like domain	Domain
B [auth aB], L [auth bB], V [auth cB]	IPR006244	Photosystem I PsaB	Family
B [auth aB], L [auth bB], V [auth cB]	IPR020586	Photosystem I PsaA/PsaB, conserved site	Conserved Site
C [auth aC], M [auth bC], W [auth cC]	IPR017900	4Fe-4S ferredoxin, iron-sulphur binding, conserved site	Conserved Site
C [auth aC], M [auth bC], W [auth cC]	IPR017896	4Fe-4S ferredoxin-type, iron-sulphur binding domain	Domain
C [auth aC], M [auth bC], W [auth cC]	IPR017491	Photosystem I protein PsaC	Family
D [auth aD], N [auth bD], X [auth cD]	IPR003685	Photosystem I PsaD	Family
D [auth aD], N [auth bD], X [auth cD]	IPR036579	Photosystem I, reaction centre subunit PsaD superfamily	Homologous Superfamily
E [auth aE], O [auth bE], Y [auth cE]	IPR008990	Electron transport accessory-like domain superfamily	Homologous Superfamily
E [auth aE], O [auth bE], Y [auth cE]	IPR003375	Photosystem I PsaE, reaction centre subunit IV	Family
F [auth aF], P [auth bF], Z [auth cF]	IPR036577	Photosystem I PsaF, reaction centre subunit III superfamily	Homologous Superfamily
F [auth aF], P [auth bF], Z [auth cF]	IPR003666	Photosystem I PsaF, reaction centre subunit III	Family
CA [auth cL], I [auth aL], S [auth bL]	IPR003757	Photosystem I PsaL, reaction centre subunit XI	Domain
CA [auth cL], I [auth aL], S [auth bL]	IPR022980	Photosystem I, reaction centre subunit XI	Family
CA [auth cL], I [auth aL], S [auth bL]	IPR036592	Photosystem I PsaL, reaction centre subunit XI superfamily	Homologous Superfamily

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A [auth aA], AA [auth cI], B [auth aB], C [auth aC], CA [auth cL] A [auth aA], AA [auth cI], B [auth aB], C [auth aC], CA [auth cL], D [auth aD], DA [auth cM], E [auth aE], F [auth aF], G [auth aI], I [auth aL], J [auth aM], K [auth bA], L [auth bB], M [auth bC], N [auth bD], O [auth bE], P [auth bF], Q [auth bI], S [auth bL], T [auth bM], U [auth cA], V [auth cB], W [auth cC], X [auth cD], Y [auth cE], Z [auth cF]	OPM	Transmembrane	Alpha-helical polytopic	Photosystems	Photosystem I

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A [auth aA], AA [auth cI], B [auth aB], C [auth aC], CA [auth cL] A [auth aA], AA [auth cI], B [auth aB], C [auth aC], CA [auth cL], D [auth aD], DA [auth cM], E [auth aE], F [auth aF], G [auth aI], I [auth aL], J [auth aM], K [auth bA], L [auth bB], M [auth bC], N [auth bD], O [auth bE], P [auth bF], Q [auth bI], S [auth bL], T [auth bM], U [auth cA], V [auth cB], W [auth cC], X [auth cD], Y [auth cE], Z [auth cF]	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Photosystems	primordial cyanobacterial photosystem I

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7F4V

Cryo-EM structure of a primordial cyanobacterial photosystem I

External Resource: Annotation

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Domain Annotation: ECOD Classification ECOD Database Homepage

Protein Family Annotation Pfam Database Homepage

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

InterPro: Protein Family Classification InterPro Database Homepage

Membrane Protein Annotation: OPM OPM Database Homepage

Membrane Protein Annotation: mpstruc mpstruc Database Homepage