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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 IDChain IDDescriptionTypeChain lengthFormula weightNumber of moleculesDB Name (Accession)Biological sourceDescriptive keywords
1A, AA, N
(A1, A2, A3)		Photosystem I P700 chlorophyll a apoprotein A1polymer75583267.83UniProt (P0A405)
Pfam (PF00223)		Thermosynechococcus vestitus BP-1PsaA
2B, BA, O
(B1, B2, B3)		Photosystem I P700 chlorophyll a apoprotein A2polymer74183123.63UniProt (P0A407)
Pfam (PF00223)		Thermosynechococcus vestitus BP-1PsaB
3C, CA, P
(C1, C2, C3)		Photosystem I iron-sulfur centerpolymer818809.23UniProt (P0A415)
Pfam (PF12838)		Thermosynechococcus vestitus BP-19 kDa polypeptide,PSI-C,Photosystem I subunit VII,PsaC
4D, DA, Q
(D1, D2, D3)		Photosystem I reaction center subunit IIpolymer13915389.53UniProt (P0A420)
Pfam (PF02531)		Thermosynechococcus vestitus BP-1Photosystem I 16 kDa polypeptide,PSI-D
5E, EA, R
(E1, E2, E3)		Photosystem I reaction center subunit IVpolymer768399.53UniProt (P0A423)
Pfam (PF02427)		Thermosynechococcus vestitus BP-1Photosystem I 8.1 kDa protein,p30 protein
6F, FA, S
(F1, F2, F3)		Photosystem I reaction center subunit IIIpolymer17419098.13UniProt (P0A401)
Pfam (PF02507)		Thermosynechococcus vestitus BP-1PSI-F
7G, GA, T
(I1, I2, I3)		Photosystem I reaction center subunit VIIIpolymer384297.23UniProt (P0A427)
Pfam (PF00796)		Thermosynechococcus vestitus BP-1
8H, HA, U
(J1, J2, J3)		Photosystem I reaction center subunit IXpolymer414770.73UniProt (P0A429)
Pfam (PF01701)		Thermosynechococcus vestitus BP-1
9I, IA, V
(K1, K2, K3)		Photosystem I reaction center subunit PsaKpolymer838484.03UniProt (P0A425)
Pfam (PF01241)		Thermosynechococcus vestitus BP-1Light-harvesting 8.0 kDa polypeptide,Photosystem I subunit X
10J, JA, W
(L1, L2, L3)		Photosystem I reaction center subunit XIpolymer15516261.73UniProt (Q8DGB4)
Pfam (PF02605)		Thermosynechococcus vestitus BP-1PSI subunit V,PSI-L
11K, KA, X
(M1, M2, M3)		Photosystem I reaction center subunit XIIpolymer313426.13UniProt (P0A403)
Pfam (PF07465)		Thermosynechococcus vestitus BP-1PSI-M
12L, LA, Y
(R1, R2, R3)		Ferredoxin-1polymer9810854.03UniProt (P0A3C9)
Pfam (PF00111)		Thermosynechococcus vestitus BP-1Ferredoxin I
13M, MA, Z
(X1, X2, X3)		Photosystem I 4.8K proteinpolymer394424.33UniProt (Q8DKP6)
Pfam (PF08078)		Thermosynechococcus vestitus BP-1
14GG, NA, YL
(A2, A1, A3)		CHLOROPHYLL A ISOMERnon-polymer893.53Chemie (CL0)
15AB, AC, AD, AE, AH...
(A1, B1, A2, B2, J2...)		CHLOROPHYLL Anon-polymer893.5285Chemie (CLA)
16EK, FC, LE, QN, WP...
(B2, A1, B1, A3, B3...)		PHYLLOQUINONEnon-polymer450.76Chemie (PQN)
PubChem (21896458)
PubChem (5280483)
PubChem (5284607)
PubChem (7048754)
PubChem (133612476)
PubChem (57138572)
PubChem (92436622)
PubChem (93233163)
PubChem (93971968)
PubChem (4812)
PubChem (5315258)
PubChem (7048753)
PubChem (7048755)
PubChem (9846607)
PubChem (162999945)
17GC, GQ, HQ, OK, PK...
(A1, C3, C2, A3, C1...)		IRON/SULFUR CLUSTERnon-polymer351.69Chemie (SF4)
18AF, AG, AI, AO, AQ...
(I1, M1, A2, A3, B3...)		BETA-CAROTENEnon-polymer536.972Chemie (BCR)
PubChem (21672398)
PubChem (176490061)
PubChem (177696266)
PubChem (46783370)
PubChem (46846294)
PubChem (5280489)
PubChem (92863345)
PubChem (124919640)
PubChem (54603957)
PubChem (54612003)
PubChem (146673260)
PubChem (152743364)
PubChem (160505766)
PubChem (86765360)
PubChem (91827292)
PubChem (92863346)
PubChem (92863347)
PubChem (92863348)
PubChem (100990628)
PubChem (101525094)
PubChem (101525095)
PubChem (573)
PubChem (5315709)
PubChem (5353436)
PubChem (5356616)
PubChem (124919639)
PubChem (5927371)
PubChem (6477957)
PubChem (9828626)
PubChem (10256668)
PubChem (129651951)
PubChem (12305639)
PubChem (12305640)
PubChem (12305642)
PubChem (12305644)
PubChem (12305647)
PubChem (12305652)
PubChem (132274419)
PubChem (145925599)
PubChem (159562859)
PubChem (172654026)
PubChem (172878405)
PubChem (173398668)
19EG, GI, HI, NC, NR...
(X1, A2, A1, X3, X2...)		1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLEnon-polymer723.09Chemie (LHG)
PubChem (65144)
PubChem (46936292)
PubChem (13305396)
PubChem (73416066)
PubChem (446440)
PubChem (9547104)
PubChem (11846227)
PubChem (138986743)
20BF, BG, CF, CG, CO...
(I1, M1, A3, L3, A2...)		UNKNOWN LIGANDnon-polymer40.151Chemie (UNL)
21EQ, MK, TE
(B3, B2, B1)		DIGALACTOSYL DIACYL GLYCEROL (DGDG)non-polymer949.33Chemie (DGD)
PubChem (24865462)
PubChem (24865463)
PubChem (46936671)
PubChem (447899)
PubChem (4629344)
PubChem (50904896)
PubChem (53480668)
PubChem (15991538)
PubChem (154573294)
PubChem (171123158)
PubChem (448441)
PubChem (134746152)
PubChem (140529801)
22AR, IL, PF
(L3, L2, L1)		CALCIUM IONnon-polymer40.13Chemie (CA)
PubChem (271)
23DG, MR, VL
(R1, R3, R2)		[2Ga-2S] clusternon-polymer203.63Chemie (GAK)
PubChem (91885523)
24AS, BS, CS, DS, ES...
(D2, E2, I2, L2, R2...)		waterwater18.0348Chemie (HOH)
Sequence modifications
F1, F2, F3: 1 - 164 (UniProt: P0A401)
PDBExternal DatabaseDetails
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
Sequence viewer
Contents of the asymmetric unit
PolymersNumber of chains39
Total formula weight811817.0
Non-Polymers*Number of molecules444
Total formula weight313978.2
All*Total formula weight1125795.2
*Water molecules are not included.

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PDB entries from 2026-05-20

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