7FIX

Cryo-EM structure of cyanobacterial photosystem I in the presence of ferredoxin and cytochrome c6

This is a non-PDB format compatible entry.

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A1, A2, A3	Photosystem I P700 chlorophyll a apoprotein A1	polymer	755	83267.8	3	UniProt (P0A405) Pfam (PF00223) In PDB	Thermosynechococcus vestitus BP-1	PsaA
2	B1, B2, B3	Photosystem I P700 chlorophyll a apoprotein A2	polymer	741	83123.6	3	UniProt (P0A407) Pfam (PF00223) In PDB	Thermosynechococcus vestitus BP-1	PsaB
3	C1, C2, C3	Photosystem I iron-sulfur center	polymer	81	8809.2	3	UniProt (P0A415) Pfam (PF12838) In PDB	Thermosynechococcus vestitus BP-1	9 kDa polypeptide,PSI-C,Photosystem I subunit VII,PsaC
4	D1, D2, D3	Photosystem I reaction center subunit II	polymer	139	15389.5	3	UniProt (P0A420) Pfam (PF02531) In PDB	Thermosynechococcus vestitus BP-1	Photosystem I 16 kDa polypeptide,PSI-D
5	E1, E2, E3	Photosystem I reaction center subunit IV	polymer	76	8399.5	3	UniProt (P0A423) Pfam (PF02427) In PDB	Thermosynechococcus vestitus BP-1	Photosystem I 8.1 kDa protein,p30 protein
6	F1, F2, F3	Photosystem I reaction center subunit III	polymer	174	19098.1	3	UniProt (P0A401) Pfam (PF02507) In PDB	Thermosynechococcus vestitus BP-1	PSI-F
7	I1, I2, I3	Photosystem I reaction center subunit VIII	polymer	38	4297.2	3	UniProt (P0A427) Pfam (PF00796) In PDB	Thermosynechococcus vestitus BP-1
8	J1, J2, J3	Photosystem I reaction center subunit IX	polymer	41	4770.7	3	UniProt (P0A429) Pfam (PF01701) In PDB	Thermosynechococcus vestitus BP-1
9	K1, K2, K3	Photosystem I reaction center subunit PsaK	polymer	83	8484.0	3	UniProt (P0A425) Pfam (PF01241) In PDB	Thermosynechococcus vestitus BP-1	Light-harvesting 8.0 kDa polypeptide,Photosystem I subunit X
10	L1, L2, L3	Photosystem I reaction center subunit XI	polymer	155	16261.7	3	UniProt (Q8DGB4) Pfam (PF02605) In PDB	Thermosynechococcus vestitus BP-1	PSI subunit V,PSI-L
11	M1, M2, M3	Photosystem I reaction center subunit XII	polymer	31	3426.1	3	UniProt (P0A403) Pfam (PF07465) In PDB	Thermosynechococcus vestitus BP-1	PSI-M
12	R1, R2, R3	Ferredoxin-1	polymer	98	10854.0	3	UniProt (P0A3C9) Pfam (PF00111) In PDB	Thermosynechococcus vestitus BP-1	Ferredoxin I
13	X1, X2, X3	Photosystem I 4.8K protein	polymer	39	4424.3	3	UniProt (Q8DKP6) Pfam (PF08078) In PDB	Thermosynechococcus vestitus BP-1
14	A2, A1, A3	CHLOROPHYLL A ISOMER	non-polymer		893.5	3	Chemie (CL0)
15	A1, B1, A2, B2, J2...	CHLOROPHYLL A	non-polymer		893.5	285	Chemie (CLA)
16	B2, A1, B1, A3, B3...	PHYLLOQUINONE	non-polymer		450.7	6	Chemie (PQN)
17	A1, C3, C2, A3, C1...	IRON/SULFUR CLUSTER	non-polymer		351.6	9	Chemie (SF4)
18	I1, M1, A2, A3, B3...	BETA-CAROTENE	non-polymer		536.9	72	Chemie (BCR)
19	X1, A2, A1, X3, X2...	1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE	non-polymer		723.0	9	Chemie (LHG)
20	I1, M1, A3, L3, A2...	UNKNOWN LIGAND	non-polymer		40.1	51	Chemie (UNL)
21	B3, B2, B1	DIGALACTOSYL DIACYL GLYCEROL (DGDG)	non-polymer		949.3	3	Chemie (DGD)
22	L3, L2, L1	CALCIUM ION	non-polymer		40.1	3	Chemie (CA)
23	R1, R3, R2	[2Ga-2S] cluster	non-polymer		203.6	3	Chemie (GAK)
24		water	water		18.0	348	Chemie (HOH)

Sequence modifications

F1, F2, F3: 1 - 164 (UniProt: P0A401)

PDB	External Database	Details
His -9	-	expression tag
His -8	-	expression tag
His -7	-	expression tag
His -6	-	expression tag
His -5	-	expression tag
His -4	-	expression tag
His -3	-	expression tag
His -2	-	expression tag
His -1	-	expression tag
His 0	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	39
	Total formula weight	811817.0
Non-Polymers*	Number of molecules	444
	Total formula weight	313978.2
All*	Total formula weight	1125795.2

*Water molecules are not included.