7fix

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

Method: ELECTRON MICROSCOPY

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1. Protein Identity and Related Structures Protein Identity & Related Structures

Photosystem I P700 chlorophyll a apoprotein A1

OrganismNot specified

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 39	Photosystem I P700 chlorophyll a apoprotein A2 × 3 （P0A407） Photosystem I iron-sulfur center × 3 （P0A415） Photosystem I reaction center subunit II × 3 （P0A420） Photosystem I reaction center subunit IV × 3 （P0A423） Photosystem I reaction center subunit III × 3 （P0A401） Photosystem I reaction center subunit VIII × 3 （P0A427） Photosystem I reaction center subunit IX × 3 （P0A429） Photosystem I reaction center subunit PsaK × 3 （P0A425） Photosystem I reaction center subunit XI × 3 （Q8DGB4） Photosystem I reaction center subunit XII × 3 （P0A403） Ferredoxin-1 × 3 （P0A3C9） Photosystem I 4.8K protein × 3 （Q8DKP6） CHLOROPHYLL A ISOMER × 3 CHLOROPHYLL A × 285 PHYLLOQUINONE × 6 IRON/SULFUR CLUSTER × 9 BETA-CAROTENE × 72 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE × 9 UNKNOWN LIGAND × 51 DIGALACTOSYL DIACYL GLYCEROL (DGDG) × 3 CALCIUM ION × 3 [2Ga-2S] cluster × 3 water × 24	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PSAA_THEEB
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A1； PDBConstruct 1–755； UniProt 1–755 Author chain A2； PDBConstruct 1–755； UniProt 1–755 Author chain A3； PDBConstruct 1–755； UniProt 1–755

Photosystem I P700 chlorophyll a apoprotein A2

OrganismNot specified

UniProt P0A407

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 39	Photosystem I P700 chlorophyll a apoprotein A1 × 3 （P0A405） Photosystem I iron-sulfur center × 3 （P0A415） Photosystem I reaction center subunit II × 3 （P0A420） Photosystem I reaction center subunit IV × 3 （P0A423） Photosystem I reaction center subunit III × 3 （P0A401） Photosystem I reaction center subunit VIII × 3 （P0A427） Photosystem I reaction center subunit IX × 3 （P0A429） Photosystem I reaction center subunit PsaK × 3 （P0A425） Photosystem I reaction center subunit XI × 3 （Q8DGB4） Photosystem I reaction center subunit XII × 3 （P0A403） Ferredoxin-1 × 3 （P0A3C9） Photosystem I 4.8K protein × 3 （Q8DKP6） CHLOROPHYLL A ISOMER × 3 CHLOROPHYLL A × 285 PHYLLOQUINONE × 6 IRON/SULFUR CLUSTER × 9 BETA-CAROTENE × 72 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE × 9 UNKNOWN LIGAND × 51 DIGALACTOSYL DIACYL GLYCEROL (DGDG) × 3 CALCIUM ION × 3 [2Ga-2S] cluster × 3 water × 24	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PSAB_THEEB
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain B1； PDBConstruct 1–741； UniProt 1–741 Author chain B2； PDBConstruct 1–741； UniProt 1–741 Author chain B3； PDBConstruct 1–741； UniProt 1–741

Photosystem I iron-sulfur center

OrganismNot specified

UniProt P0A415

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 39	Photosystem I P700 chlorophyll a apoprotein A1 × 3 （P0A405） Photosystem I P700 chlorophyll a apoprotein A2 × 3 （P0A407） Photosystem I reaction center subunit II × 3 （P0A420） Photosystem I reaction center subunit IV × 3 （P0A423） Photosystem I reaction center subunit III × 3 （P0A401） Photosystem I reaction center subunit VIII × 3 （P0A427） Photosystem I reaction center subunit IX × 3 （P0A429） Photosystem I reaction center subunit PsaK × 3 （P0A425） Photosystem I reaction center subunit XI × 3 （Q8DGB4） Photosystem I reaction center subunit XII × 3 （P0A403） Ferredoxin-1 × 3 （P0A3C9） Photosystem I 4.8K protein × 3 （Q8DKP6） CHLOROPHYLL A ISOMER × 3 CHLOROPHYLL A × 285 PHYLLOQUINONE × 6 IRON/SULFUR CLUSTER × 9 BETA-CAROTENE × 72 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE × 9 UNKNOWN LIGAND × 51 DIGALACTOSYL DIACYL GLYCEROL (DGDG) × 3 CALCIUM ION × 3 [2Ga-2S] cluster × 3 water × 24	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PSAC_THEEB
Isoform	—
PDB entities	3
Chains and sequence ranges	Author chain C1； PDBConstruct 1–81； UniProt 1–81 Author chain C2； PDBConstruct 1–81； UniProt 1–81 Author chain C3； PDBConstruct 1–81； UniProt 1–81

Photosystem I reaction center subunit II

OrganismNot specified

UniProt P0A420

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 39	Photosystem I P700 chlorophyll a apoprotein A1 × 3 （P0A405） Photosystem I P700 chlorophyll a apoprotein A2 × 3 （P0A407） Photosystem I iron-sulfur center × 3 （P0A415） Photosystem I reaction center subunit IV × 3 （P0A423） Photosystem I reaction center subunit III × 3 （P0A401） Photosystem I reaction center subunit VIII × 3 （P0A427） Photosystem I reaction center subunit IX × 3 （P0A429） Photosystem I reaction center subunit PsaK × 3 （P0A425） Photosystem I reaction center subunit XI × 3 （Q8DGB4） Photosystem I reaction center subunit XII × 3 （P0A403） Ferredoxin-1 × 3 （P0A3C9） Photosystem I 4.8K protein × 3 （Q8DKP6） CHLOROPHYLL A ISOMER × 3 CHLOROPHYLL A × 285 PHYLLOQUINONE × 6 IRON/SULFUR CLUSTER × 9 BETA-CAROTENE × 72 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE × 9 UNKNOWN LIGAND × 51 DIGALACTOSYL DIACYL GLYCEROL (DGDG) × 3 CALCIUM ION × 3 [2Ga-2S] cluster × 3 water × 24	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PSAD_THEEB
Isoform	—
PDB entities	4
Chains and sequence ranges	Author chain D1； PDBConstruct 1–139； UniProt 1–139 Author chain D2； PDBConstruct 1–139； UniProt 1–139 Author chain D3； PDBConstruct 1–139； UniProt 1–139

Photosystem I reaction center subunit IV

OrganismNot specified

UniProt P0A423

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 39	Photosystem I P700 chlorophyll a apoprotein A1 × 3 （P0A405） Photosystem I P700 chlorophyll a apoprotein A2 × 3 （P0A407） Photosystem I iron-sulfur center × 3 （P0A415） Photosystem I reaction center subunit II × 3 （P0A420） Photosystem I reaction center subunit III × 3 （P0A401） Photosystem I reaction center subunit VIII × 3 （P0A427） Photosystem I reaction center subunit IX × 3 （P0A429） Photosystem I reaction center subunit PsaK × 3 （P0A425） Photosystem I reaction center subunit XI × 3 （Q8DGB4） Photosystem I reaction center subunit XII × 3 （P0A403） Ferredoxin-1 × 3 （P0A3C9） Photosystem I 4.8K protein × 3 （Q8DKP6） CHLOROPHYLL A ISOMER × 3 CHLOROPHYLL A × 285 PHYLLOQUINONE × 6 IRON/SULFUR CLUSTER × 9 BETA-CAROTENE × 72 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE × 9 UNKNOWN LIGAND × 51 DIGALACTOSYL DIACYL GLYCEROL (DGDG) × 3 CALCIUM ION × 3 [2Ga-2S] cluster × 3 water × 24	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PSAE_THEEB
Isoform	—
PDB entities	5
Chains and sequence ranges	Author chain E1； PDBConstruct 1–76； UniProt 1–76 Author chain E2； PDBConstruct 1–76； UniProt 1–76 Author chain E3； PDBConstruct 1–76； UniProt 1–76

Photosystem I reaction center subunit III

Thermosynechococcus vestitus BP-1

UniProt P0A401

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 39	Photosystem I P700 chlorophyll a apoprotein A1 × 3 （P0A405） Photosystem I P700 chlorophyll a apoprotein A2 × 3 （P0A407） Photosystem I iron-sulfur center × 3 （P0A415） Photosystem I reaction center subunit II × 3 （P0A420） Photosystem I reaction center subunit IV × 3 （P0A423） Photosystem I reaction center subunit VIII × 3 （P0A427） Photosystem I reaction center subunit IX × 3 （P0A429） Photosystem I reaction center subunit PsaK × 3 （P0A425） Photosystem I reaction center subunit XI × 3 （Q8DGB4） Photosystem I reaction center subunit XII × 3 （P0A403） Ferredoxin-1 × 3 （P0A3C9） Photosystem I 4.8K protein × 3 （Q8DKP6） CHLOROPHYLL A ISOMER × 3 CHLOROPHYLL A × 285 PHYLLOQUINONE × 6 IRON/SULFUR CLUSTER × 9 BETA-CAROTENE × 72 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE × 9 UNKNOWN LIGAND × 51 DIGALACTOSYL DIACYL GLYCEROL (DGDG) × 3 CALCIUM ION × 3 [2Ga-2S] cluster × 3 water × 24	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PSAF_THEEB
Isoform	—
PDB entities	6
Chains and sequence ranges	Author chain F1； PDBConstruct 11–174； UniProt 1–164 Author chain F2； PDBConstruct 11–174； UniProt 1–164 Author chain F3； PDBConstruct 11–174； UniProt 1–164

Photosystem I reaction center subunit VIII

OrganismNot specified

UniProt P0A427

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 39	Photosystem I P700 chlorophyll a apoprotein A1 × 3 （P0A405） Photosystem I P700 chlorophyll a apoprotein A2 × 3 （P0A407） Photosystem I iron-sulfur center × 3 （P0A415） Photosystem I reaction center subunit II × 3 （P0A420） Photosystem I reaction center subunit IV × 3 （P0A423） Photosystem I reaction center subunit III × 3 （P0A401） Photosystem I reaction center subunit IX × 3 （P0A429） Photosystem I reaction center subunit PsaK × 3 （P0A425） Photosystem I reaction center subunit XI × 3 （Q8DGB4） Photosystem I reaction center subunit XII × 3 （P0A403） Ferredoxin-1 × 3 （P0A3C9） Photosystem I 4.8K protein × 3 （Q8DKP6） CHLOROPHYLL A ISOMER × 3 CHLOROPHYLL A × 285 PHYLLOQUINONE × 6 IRON/SULFUR CLUSTER × 9 BETA-CAROTENE × 72 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE × 9 UNKNOWN LIGAND × 51 DIGALACTOSYL DIACYL GLYCEROL (DGDG) × 3 CALCIUM ION × 3 [2Ga-2S] cluster × 3 water × 24	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PSAI_THEEB
Isoform	—
PDB entities	7
Chains and sequence ranges	Author chain I1； PDBConstruct 1–38； UniProt 1–38 Author chain I2； PDBConstruct 1–38； UniProt 1–38 Author chain I3； PDBConstruct 1–38； UniProt 1–38

Photosystem I reaction center subunit IX

OrganismNot specified

UniProt P0A429

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 39	Photosystem I P700 chlorophyll a apoprotein A1 × 3 （P0A405） Photosystem I P700 chlorophyll a apoprotein A2 × 3 （P0A407） Photosystem I iron-sulfur center × 3 （P0A415） Photosystem I reaction center subunit II × 3 （P0A420） Photosystem I reaction center subunit IV × 3 （P0A423） Photosystem I reaction center subunit III × 3 （P0A401） Photosystem I reaction center subunit VIII × 3 （P0A427） Photosystem I reaction center subunit PsaK × 3 （P0A425） Photosystem I reaction center subunit XI × 3 （Q8DGB4） Photosystem I reaction center subunit XII × 3 （P0A403） Ferredoxin-1 × 3 （P0A3C9） Photosystem I 4.8K protein × 3 （Q8DKP6） CHLOROPHYLL A ISOMER × 3 CHLOROPHYLL A × 285 PHYLLOQUINONE × 6 IRON/SULFUR CLUSTER × 9 BETA-CAROTENE × 72 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE × 9 UNKNOWN LIGAND × 51 DIGALACTOSYL DIACYL GLYCEROL (DGDG) × 3 CALCIUM ION × 3 [2Ga-2S] cluster × 3 water × 24	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PSAJ_THEEB
Isoform	—
PDB entities	8
Chains and sequence ranges	Author chain J1； PDBConstruct 1–41； UniProt 1–41 Author chain J2； PDBConstruct 1–41； UniProt 1–41 Author chain J3； PDBConstruct 1–41； UniProt 1–41

Photosystem I reaction center subunit PsaK

OrganismNot specified

UniProt P0A425

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 39	Photosystem I P700 chlorophyll a apoprotein A1 × 3 （P0A405） Photosystem I P700 chlorophyll a apoprotein A2 × 3 （P0A407） Photosystem I iron-sulfur center × 3 （P0A415） Photosystem I reaction center subunit II × 3 （P0A420） Photosystem I reaction center subunit IV × 3 （P0A423） Photosystem I reaction center subunit III × 3 （P0A401） Photosystem I reaction center subunit VIII × 3 （P0A427） Photosystem I reaction center subunit IX × 3 （P0A429） Photosystem I reaction center subunit XI × 3 （Q8DGB4） Photosystem I reaction center subunit XII × 3 （P0A403） Ferredoxin-1 × 3 （P0A3C9） Photosystem I 4.8K protein × 3 （Q8DKP6） CHLOROPHYLL A ISOMER × 3 CHLOROPHYLL A × 285 PHYLLOQUINONE × 6 IRON/SULFUR CLUSTER × 9 BETA-CAROTENE × 72 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE × 9 UNKNOWN LIGAND × 51 DIGALACTOSYL DIACYL GLYCEROL (DGDG) × 3 CALCIUM ION × 3 [2Ga-2S] cluster × 3 water × 24	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PSAK_THEEB
Isoform	—
PDB entities	9
Chains and sequence ranges	Author chain K1； PDBConstruct 1–83； UniProt 1–83 Author chain K2； PDBConstruct 1–83； UniProt 1–83 Author chain K3； PDBConstruct 1–83； UniProt 1–83

Photosystem I reaction center subunit XI

OrganismNot specified

UniProt Q8DGB4

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 39	Photosystem I P700 chlorophyll a apoprotein A1 × 3 （P0A405） Photosystem I P700 chlorophyll a apoprotein A2 × 3 （P0A407） Photosystem I iron-sulfur center × 3 （P0A415） Photosystem I reaction center subunit II × 3 （P0A420） Photosystem I reaction center subunit IV × 3 （P0A423） Photosystem I reaction center subunit III × 3 （P0A401） Photosystem I reaction center subunit VIII × 3 （P0A427） Photosystem I reaction center subunit IX × 3 （P0A429） Photosystem I reaction center subunit PsaK × 3 （P0A425） Photosystem I reaction center subunit XII × 3 （P0A403） Ferredoxin-1 × 3 （P0A3C9） Photosystem I 4.8K protein × 3 （Q8DKP6） CHLOROPHYLL A ISOMER × 3 CHLOROPHYLL A × 285 PHYLLOQUINONE × 6 IRON/SULFUR CLUSTER × 9 BETA-CAROTENE × 72 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE × 9 UNKNOWN LIGAND × 51 DIGALACTOSYL DIACYL GLYCEROL (DGDG) × 3 CALCIUM ION × 3 [2Ga-2S] cluster × 3 water × 24	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PSAL_THEEB
Isoform	—
PDB entities	10
Chains and sequence ranges	Author chain L1； PDBConstruct 1–155； UniProt 1–155 Author chain L2； PDBConstruct 1–155； UniProt 1–155 Author chain L3； PDBConstruct 1–155； UniProt 1–155

Photosystem I reaction center subunit XII

OrganismNot specified

UniProt P0A403

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 39	Photosystem I P700 chlorophyll a apoprotein A1 × 3 （P0A405） Photosystem I P700 chlorophyll a apoprotein A2 × 3 （P0A407） Photosystem I iron-sulfur center × 3 （P0A415） Photosystem I reaction center subunit II × 3 （P0A420） Photosystem I reaction center subunit IV × 3 （P0A423） Photosystem I reaction center subunit III × 3 （P0A401） Photosystem I reaction center subunit VIII × 3 （P0A427） Photosystem I reaction center subunit IX × 3 （P0A429） Photosystem I reaction center subunit PsaK × 3 （P0A425） Photosystem I reaction center subunit XI × 3 （Q8DGB4） Ferredoxin-1 × 3 （P0A3C9） Photosystem I 4.8K protein × 3 （Q8DKP6） CHLOROPHYLL A ISOMER × 3 CHLOROPHYLL A × 285 PHYLLOQUINONE × 6 IRON/SULFUR CLUSTER × 9 BETA-CAROTENE × 72 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE × 9 UNKNOWN LIGAND × 51 DIGALACTOSYL DIACYL GLYCEROL (DGDG) × 3 CALCIUM ION × 3 [2Ga-2S] cluster × 3 water × 24	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PSAM_THEEB
Isoform	—
PDB entities	11
Chains and sequence ranges	Author chain M1； PDBConstruct 1–31； UniProt 1–31 Author chain M2； PDBConstruct 1–31； UniProt 1–31 Author chain M3； PDBConstruct 1–31； UniProt 1–31

Ferredoxin-1

Thermosynechococcus vestitus BP-1

UniProt P0A3C9

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 39	Photosystem I P700 chlorophyll a apoprotein A1 × 3 （P0A405） Photosystem I P700 chlorophyll a apoprotein A2 × 3 （P0A407） Photosystem I iron-sulfur center × 3 （P0A415） Photosystem I reaction center subunit II × 3 （P0A420） Photosystem I reaction center subunit IV × 3 （P0A423） Photosystem I reaction center subunit III × 3 （P0A401） Photosystem I reaction center subunit VIII × 3 （P0A427） Photosystem I reaction center subunit IX × 3 （P0A429） Photosystem I reaction center subunit PsaK × 3 （P0A425） Photosystem I reaction center subunit XI × 3 （Q8DGB4） Photosystem I reaction center subunit XII × 3 （P0A403） Photosystem I 4.8K protein × 3 （Q8DKP6） CHLOROPHYLL A ISOMER × 3 CHLOROPHYLL A × 285 PHYLLOQUINONE × 6 IRON/SULFUR CLUSTER × 9 BETA-CAROTENE × 72 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE × 9 UNKNOWN LIGAND × 51 DIGALACTOSYL DIACYL GLYCEROL (DGDG) × 3 CALCIUM ION × 3 [2Ga-2S] cluster × 3 water × 24	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	FER_THEEB
Isoform	—
PDB entities	12
Chains and sequence ranges	Author chain R1； PDBConstruct 1–98； UniProt 1–98 Author chain R2； PDBConstruct 1–98； UniProt 1–98 Author chain R3； PDBConstruct 1–98； UniProt 1–98

Photosystem I 4.8K protein

Thermosynechococcus vestitus BP-1

UniProt Q8DKP6

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 39	Photosystem I P700 chlorophyll a apoprotein A1 × 3 （P0A405） Photosystem I P700 chlorophyll a apoprotein A2 × 3 （P0A407） Photosystem I iron-sulfur center × 3 （P0A415） Photosystem I reaction center subunit II × 3 （P0A420） Photosystem I reaction center subunit IV × 3 （P0A423） Photosystem I reaction center subunit III × 3 （P0A401） Photosystem I reaction center subunit VIII × 3 （P0A427） Photosystem I reaction center subunit IX × 3 （P0A429） Photosystem I reaction center subunit PsaK × 3 （P0A425） Photosystem I reaction center subunit XI × 3 （Q8DGB4） Photosystem I reaction center subunit XII × 3 （P0A403） Ferredoxin-1 × 3 （P0A3C9） CHLOROPHYLL A ISOMER × 3 CHLOROPHYLL A × 285 PHYLLOQUINONE × 6 IRON/SULFUR CLUSTER × 9 BETA-CAROTENE × 72 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE × 9 UNKNOWN LIGAND × 51 DIGALACTOSYL DIACYL GLYCEROL (DGDG) × 3 CALCIUM ION × 3 [2Ga-2S] cluster × 3 water × 24	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q8DKP6_THEEB
Isoform	—
PDB entities	13
Chains and sequence ranges	Author chain X1； PDBConstruct 1–39； UniProt 1–39 Author chain X2； PDBConstruct 1–39； UniProt 1–39 Author chain X3； PDBConstruct 1–39； UniProt 1–39

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id	7fix
Deposition date deposition_date	2021-08-01
Structure title title	Cryo-EM structure of cyanobacterial photosystem I in the presence of ferredoxin and cytochrome c6
Keywords keywords	Photosystem I, Ferredoxin, Cytochrome c6, PHOTOSYNTHESIS; PHOTOSYNTHESIS
Experimental Method method	ELECTRON MICROSCOPY

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3. Official assembly/model SAXS Official SAXS Profiles

This page reads only the latest assembly calculations. Every curve maps to an explicit PDB entry, official biological assembly and coordinate model.

7fix__assembly_1__model_1

Assembly 1 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

7fix__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

7fix__assembly_1__model_1 | P(r) · Pending

P(r) will be calculated and displayed separately for the same assembly/model.

Rg（Guinier）	69.40 Å
Rg (electron density)	68.31 Å
Total Rg	68.44 Å
Atom count	73581
Residues	7137
Excluded volume	1358700 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`7fix__assembly_1__model_1`	39-meric （39）	Success	4.1.3-1-20251215 (887e7ef)	View Download

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4. Crystallography and Experiment 4. Crystallography & Experiment

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5. Entities and Polymers Entities & Polymers (24)

Entity 1 Entity 1 polymer

Description description	Photosystem I P700 chlorophyll a apoprotein A1
Molecular weight formula_weight	83267.8 kDa
EC 编号 ec_number	1.97.1.12
Source method src_method	nat
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A1,A2,A3
Atom count atom_count	73929

MTISPPEREPKVRVVVDNDPVPTSFEKWAKPGHFDRTLARGPQTTTWIWNLHALAHDFDTHTSDLEDISRKIFSAHFGHLAVVFIWLSGMYFHGAKFSNYEAWLADPTGIKPSAQVVWPIVGQGILNGDVGGGFHGIQITSGLFQLWRASGITNEFQLYCTAIGGLVMAGLMLFAGWFHYHKRAPKLEWFQNVESMLNHHLAGLLGLGSLAWAGHQIHVSLPINKLLDAGVAAKDIPLPHEFILNPSLMAELYPKVDWGFFSGVIPFFTFNWAAYSDFLTFNGGLNPVTGGLWLSDTAHHHLAIAVLFIIAGHMYRTNWGIGHSLKEILEAHKGPFTGAGHKGLYEVLTTSWHAQLAINLAMMGSLSIIVAQHMYAMPPYPYLATDYPTQLSLFTHHMWIGGFLVVGGAAHGAIFMVRDYDPAMNQNNVLDRVLRHRDAIISHLNWVCIFLGFHSFGLYVHNDTMRAFGRPQDMFSDTGIQLQPVFAQWVQNLHTLAPGGTAPNAAATASVAFGGDVVAVGGKVAMMPIVLGTADFMVHHIHAFTIHVTVLILLKGVLFARSSRLIPDKANLGFRFPCDGPGRGGTCQVSGWDHVFLGLFWMYNCISVVIFHFSWKMQSDVWGTVAPDGTVSHITGGNFAQSAITINGWLRDFLWAQASQVIGSYGSALSAYGLLFLGAHFIWAFSLMFLFSGRGYWQELIESIVWAHNKLKVAPAIQPRALSIIQGRAVGVAHYLLGGIATTWAFFLARIISVG

Entity 2 Entity 2 polymer

Description description	Photosystem I P700 chlorophyll a apoprotein A2
Molecular weight formula_weight	83123.6 kDa
EC 编号 ec_number	1.97.1.12
Source method src_method	nat
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B1,B2,B3

MATKFPKFSQDLAQDPTTRRIWYAIAMAHDFESHDGMTEENLYQKIFASHFGHLAIIFLWVSGSLFHVAWQGNFEQWVQDPVNTRPIAHAIWDPQFGKAAVDAFTQAGASNPVDIAYSGVYHWWYTIGMRTNGDLYQGAIFLLILASLALFAGWLHLQPKFRPSLSWFKNAESRLNHHLAGLFGVSSLAWAGHLIHVAIPESRGQHVGWDNFLSTMPHPAGLAPFFTGNWGVYAQNPDTASHVFGTAQGAGTAILTFLGGFHPQTESLWLTDMAHHHLAIAVLFIVAGHMYRTQFGIGHSIKEMMDAKDFFGTKVEGPFNMPHQGIYETYNNSLHFQLGWHLACLGVITSLVAQHMYSLPPYAFIAQDHTTMAALYTHHQYIAGFLMVGAFAHGAIFLVRDYDPAQNKGNVLDRVLQHKEAIISHLSWVSLFLGFHTLGLYVHNDVVVAFGTPEKQILIEPVFAQFIQAAHGKLLYGFDTLLSNPDSIASTAWPNYGNVWLPGWLDAINSGTNSLFLTIGPGDFLVHHAIALGLHTTTLILVKGALDARGSKLMPDKKDFGYAFPCDGPGRGGTCDISAWDAFYLAMFWMLNTIGWVTFYWHWKHLGVWEGNVAQFNESSTYLMGWLRDYLWLNSSQLINGYNPFGTNNLSVWAWMFLFGHLVWATGFMFLISWRGYWQELIETLVWAHERTPLANLVRWKDKPVALSIVQARLVGLAHFSVGYILTYAAFLIASTAAKFG

Entity 3 Entity 3 polymer

Description description	Photosystem I iron-sulfur center
Molecular weight formula_weight	8809.2 kDa
EC 编号 ec_number	1.97.1.12
Source method src_method	nat
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C1,C2,C3

MAHTVKIYDTCIGCTQCVRACPTDVLEMVPWDGCKAGQIASSPRTEDCVGCKRCETACPTDFLSIRVYLGAETTRSMGLAY

Entity 4 Entity 4 polymer

Description description	Photosystem I reaction center subunit II
Molecular weight formula_weight	15389.5 kDa
Source method src_method	nat
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	D1,D2,D3

MTTLTGQPPLYGGSTGGLLSAADTEEKYAITWTSPKEQVFEMPTAGAAVMREGENLVYFARKEQCLALAAQQLRPRKINDYKIYRIFPDGETVLIHPKDGVFPEKVNKGREAVNSVPRSIGQNPNPSQLKFTGKKPYDP

Entity 5 Entity 5 polymer

Description description	Photosystem I reaction center subunit IV
Molecular weight formula_weight	8399.5 kDa
Source method src_method	nat
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	E1,E2,E3

MVQRGSKVKILRPESYWYNEVGTVASVDQTPGVKYPVIVRFDKVNYTGYSGSASGVNTNNFALHEVQEVAPPKKGK

Entity 6 Entity 6 polymer

Description description	Photosystem I reaction center subunit III
Molecular weight formula_weight	19098.1 kDa
Source method src_method	man
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	F1,F2,F3

HHHHHHHHHHMRRFLALLLVLTLWLGFTPLASADVAGLVPCKDSPAFQKRAAAAVNTTADPASGQKRFERYSQALCGEDGLPHLVVDGRLSRAGDFLIPSVLFLYIAGWIGWVGRAYLIAVRNSGEANEKEIIIDVPLAIKCMLTGFAWPLAALKELASGELTAKDNEITVSPR

Source Source

Source organism organism	Thermosynechococcus vestitus BP-1
NCBI taxonomy ID ncbi_taxonomy_id	197221
Host organism host_organism	Thermosynechococcus vestitus BP-1

Entity 7 Entity 7 polymer

Description description	Photosystem I reaction center subunit VIII
Molecular weight formula_weight	4297.2 kDa
Source method src_method	nat
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	I1,I2,I3

MMGSYAASFLPWIFIPVVCWLMPTVVMGLLFLYIEGEA

Entity 8 Entity 8 polymer

Description description	Photosystem I reaction center subunit IX
Molecular weight formula_weight	4770.7 kDa
Source method src_method	nat
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	J1,J2,J3

MKHFLTYLSTAPVLAAIWMTITAGILIEFNRFYPDLLFHPL

Entity 9 Entity 9 polymer

Description description	Photosystem I reaction center subunit PsaK
Molecular weight formula_weight	8484.0 kDa
Source method src_method	nat
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	K1,K2,K3

MVLATLPDTTWTPSVGLVVILCNLFAIALGRYAIQSRGKGPGLPIALPALFEGFGLPELLATTSFGHLLAAGVVSGLQYAGAL

Entity 10 Entity 10 polymer

Description description	Photosystem I reaction center subunit XI
Molecular weight formula_weight	16261.7 kDa
Source method src_method	nat
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	L1,L2,L3

MAEELVKPYNGDPFVGHLSTPISDSGLVKTFIGNLPAYRQGLSPILRGLEVGMAHGYFLIGPWVKLGPLRDSDVANLGGLISGIALILVATACLAAYGLVSFQKGGSSSDPLKTSEGWSQFTAGFFVGAMGSAFVAFFLLENFSVVDGIMTGLFN

Entity 11 Entity 11 polymer

Description description	Photosystem I reaction center subunit XII
Molecular weight formula_weight	3426.1 kDa
Source method src_method	nat
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	M1,M2,M3

MALTDTQVYVALVIALLPAVLAFRLSTELYK

Entity 12 Entity 12 polymer

Description description	Ferredoxin-1
Molecular weight formula_weight	10854.0 kDa
Source method src_method	man
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	R1,R2,R3

MATYKVTLVRPDGSETTIDVPEDEYILDVAEEQGLDLPFSCRAGACSTCAGKLLEGEVDQSDQSFLDDDQIEKGFVLTCVAYPRSDCKILTNQEEELY

Source Source

Source organism organism	Thermosynechococcus vestitus BP-1
NCBI taxonomy ID ncbi_taxonomy_id	197221
Host organism host_organism	Escherichia coli

Entity 13 Entity 13 polymer

Description description	Photosystem I 4.8K protein
Molecular weight formula_weight	4424.3 kDa
Source method src_method	man
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	X1,X2,X3

MSTMATKSAKPTYAFRTFWAVLLLAINFLVAAYYFGILK

Source Source

Source organism organism	Thermosynechococcus vestitus BP-1
NCBI taxonomy ID ncbi_taxonomy_id	197221
Host organism host_organism	Thermosynechococcus vestitus BP-1

Entity 14 Entity 14 non-polymer

Description description	CHLOROPHYLL A ISOMER
Molecular weight formula_weight	893.5 kDa
Source method src_method	syn
Copy count entity_count	3

Entity 15 Entity 15 non-polymer

Description description	CHLOROPHYLL A
Molecular weight formula_weight	893.5 kDa
Source method src_method	syn
Copy count entity_count	285

Entity 16 Entity 16 non-polymer

Description description	PHYLLOQUINONE
Molecular weight formula_weight	450.7 kDa
Source method src_method	syn
Copy count entity_count	6

Entity 17 Entity 17 non-polymer

Description description	IRON/SULFUR CLUSTER
Molecular weight formula_weight	351.6 kDa
Source method src_method	syn
Copy count entity_count	9

Entity 18 Entity 18 non-polymer

Description description	BETA-CAROTENE
Molecular weight formula_weight	536.9 kDa
Source method src_method	syn
Copy count entity_count	72

Entity 19 Entity 19 non-polymer

Description description	1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE
Molecular weight formula_weight	723.0 kDa
Source method src_method	syn
Copy count entity_count	9

Entity 20 Entity 20 non-polymer

Description description	UNKNOWN LIGAND
Molecular weight formula_weight	40.1 kDa
Source method src_method	syn
Copy count entity_count	51

Entity 21 Entity 21 non-polymer

Description description	DIGALACTOSYL DIACYL GLYCEROL (DGDG)
Molecular weight formula_weight	949.3 kDa
Source method src_method	syn
Copy count entity_count	3

Entity 22 Entity 22 non-polymer

Description description	CALCIUM ION
Molecular weight formula_weight	40.1 kDa
Source method src_method	syn
Copy count entity_count	3

Entity 23 Entity 23 non-polymer

Description description	[2Ga-2S] cluster
Molecular weight formula_weight	203.6 kDa
Source method src_method	syn
Copy count entity_count	3

Entity 24 Entity 24 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	348

▶

Unit-cell length a length_a	1.000 Å
Unit-cell length b length_b	1.000 Å
Unit-cell length c length_c	1.000 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	—

Space group space_group	P 1
Space-group number int_tables_number	1
Crystal system crystal_system	—

Resolution resolution	1.97 Å
Resolution测定Method resolution_method	—
颗粒数 num_particles	207142

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

1. Protein Identity and Related Structures Protein Identity & Related Structures

Photosystem I P700 chlorophyll a apoprotein A1

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Photosystem I P700 chlorophyll a apoprotein A2

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Photosystem I iron-sulfur center

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Photosystem I reaction center subunit II

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Photosystem I reaction center subunit IV

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Photosystem I reaction center subunit III

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Photosystem I reaction center subunit VIII

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Photosystem I reaction center subunit IX

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Photosystem I reaction center subunit PsaK

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Photosystem I reaction center subunit XI

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer