6kif

Structure of cyanobacterial photosystem I-IsiA-flavodoxin supercomplex

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 54	Photosystem I P700 chlorophyll a apoprotein A2 × 3 （Q31LJ1） Photosystem I iron-sulfur center × 3 （Q31QV2） Photosystem I reaction center subunit II × 3 （Q31PI7） Photosystem I reaction center subunit IV × 3 （Q31NL7） Photosystem I reaction center subunit III × 3 （Q31NT9） Photosystem I PsaI protein × 3 （P95823） Photosystem I reaction center subunit IX × 3 （Q31NU0） Photosystem I reaction center subunit PsaK × 3 （Q31PR9） Photosystem I reaction center subunit XI × 3 （P95822） PsaM × 3 Flavodoxin × 3 （P10340） Iron stress-induced chlorophyll-binding protein × 18 （P15347） CHLOROPHYLL A × 594 PHYLLOQUINONE × 6 IRON/SULFUR CLUSTER × 9 BETA-CAROTENE × 144 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE × 45 DODECYL-ALPHA-D-MALTOSIDE × 12 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE × 6 1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL × 24 FLAVIN MONONUCLEOTIDE × 3 water × 12	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PSAA_SYNE7
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–763； UniProt 1–763 Author chain G； PDBConstruct 1–763； UniProt 1–763 Author chain e； PDBConstruct 1–763； UniProt 1–763

Photosystem I P700 chlorophyll a apoprotein A2

OrganismNot specified

UniProt Q31LJ1

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 54	Photosystem I P700 chlorophyll a apoprotein A1 × 3 （Q31LJ0） Photosystem I iron-sulfur center × 3 （Q31QV2） Photosystem I reaction center subunit II × 3 （Q31PI7） Photosystem I reaction center subunit IV × 3 （Q31NL7） Photosystem I reaction center subunit III × 3 （Q31NT9） Photosystem I PsaI protein × 3 （P95823） Photosystem I reaction center subunit IX × 3 （Q31NU0） Photosystem I reaction center subunit PsaK × 3 （Q31PR9） Photosystem I reaction center subunit XI × 3 （P95822） PsaM × 3 Flavodoxin × 3 （P10340） Iron stress-induced chlorophyll-binding protein × 18 （P15347） CHLOROPHYLL A × 594 PHYLLOQUINONE × 6 IRON/SULFUR CLUSTER × 9 BETA-CAROTENE × 144 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE × 45 DODECYL-ALPHA-D-MALTOSIDE × 12 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE × 6 1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL × 24 FLAVIN MONONUCLEOTIDE × 3 water × 12	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PSAB_SYNE7
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain B； PDBConstruct 1–734； UniProt 1–734 Author chain H； PDBConstruct 1–734； UniProt 1–734 Author chain f； PDBConstruct 1–734； UniProt 1–734

Photosystem I iron-sulfur center

OrganismNot specified

UniProt Q31QV2

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 54	Photosystem I P700 chlorophyll a apoprotein A1 × 3 （Q31LJ0） Photosystem I P700 chlorophyll a apoprotein A2 × 3 （Q31LJ1） Photosystem I reaction center subunit II × 3 （Q31PI7） Photosystem I reaction center subunit IV × 3 （Q31NL7） Photosystem I reaction center subunit III × 3 （Q31NT9） Photosystem I PsaI protein × 3 （P95823） Photosystem I reaction center subunit IX × 3 （Q31NU0） Photosystem I reaction center subunit PsaK × 3 （Q31PR9） Photosystem I reaction center subunit XI × 3 （P95822） PsaM × 3 Flavodoxin × 3 （P10340） Iron stress-induced chlorophyll-binding protein × 18 （P15347） CHLOROPHYLL A × 594 PHYLLOQUINONE × 6 IRON/SULFUR CLUSTER × 9 BETA-CAROTENE × 144 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE × 45 DODECYL-ALPHA-D-MALTOSIDE × 12 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE × 6 1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL × 24 FLAVIN MONONUCLEOTIDE × 3 water × 12	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PSAC_SYNE7
Isoform	—
PDB entities	3
Chains and sequence ranges	Author chain C； PDBConstruct 1–81； UniProt 1–81 Author chain N； PDBConstruct 1–81； UniProt 1–81 Author chain g； PDBConstruct 1–81； UniProt 1–81

Photosystem I reaction center subunit II

OrganismNot specified

UniProt Q31PI7

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 54	Photosystem I P700 chlorophyll a apoprotein A1 × 3 （Q31LJ0） Photosystem I P700 chlorophyll a apoprotein A2 × 3 （Q31LJ1） Photosystem I iron-sulfur center × 3 （Q31QV2） Photosystem I reaction center subunit IV × 3 （Q31NL7） Photosystem I reaction center subunit III × 3 （Q31NT9） Photosystem I PsaI protein × 3 （P95823） Photosystem I reaction center subunit IX × 3 （Q31NU0） Photosystem I reaction center subunit PsaK × 3 （Q31PR9） Photosystem I reaction center subunit XI × 3 （P95822） PsaM × 3 Flavodoxin × 3 （P10340） Iron stress-induced chlorophyll-binding protein × 18 （P15347） CHLOROPHYLL A × 594 PHYLLOQUINONE × 6 IRON/SULFUR CLUSTER × 9 BETA-CAROTENE × 144 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE × 45 DODECYL-ALPHA-D-MALTOSIDE × 12 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE × 6 1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL × 24 FLAVIN MONONUCLEOTIDE × 3 water × 12	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q31PI7_SYNE7
Isoform	—
PDB entities	4
Chains and sequence ranges	Author chain D； PDBConstruct 1–141； UniProt 2–142 Author chain O； PDBConstruct 1–141； UniProt 2–142 Author chain h； PDBConstruct 1–141； UniProt 2–142

Photosystem I reaction center subunit IV

OrganismNot specified

UniProt Q31NL7

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 54	Photosystem I P700 chlorophyll a apoprotein A1 × 3 （Q31LJ0） Photosystem I P700 chlorophyll a apoprotein A2 × 3 （Q31LJ1） Photosystem I iron-sulfur center × 3 （Q31QV2） Photosystem I reaction center subunit II × 3 （Q31PI7） Photosystem I reaction center subunit III × 3 （Q31NT9） Photosystem I PsaI protein × 3 （P95823） Photosystem I reaction center subunit IX × 3 （Q31NU0） Photosystem I reaction center subunit PsaK × 3 （Q31PR9） Photosystem I reaction center subunit XI × 3 （P95822） PsaM × 3 Flavodoxin × 3 （P10340） Iron stress-induced chlorophyll-binding protein × 18 （P15347） CHLOROPHYLL A × 594 PHYLLOQUINONE × 6 IRON/SULFUR CLUSTER × 9 BETA-CAROTENE × 144 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE × 45 DODECYL-ALPHA-D-MALTOSIDE × 12 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE × 6 1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL × 24 FLAVIN MONONUCLEOTIDE × 3 water × 12	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PSAE_SYNE7
Isoform	—
PDB entities	5
Chains and sequence ranges	Author chain E； PDBConstruct 1–75； UniProt 1–75 Author chain Q； PDBConstruct 1–75； UniProt 1–75 Author chain i； PDBConstruct 1–75； UniProt 1–75

Photosystem I reaction center subunit III

OrganismNot specified

UniProt Q31NT9

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 54	Photosystem I P700 chlorophyll a apoprotein A1 × 3 （Q31LJ0） Photosystem I P700 chlorophyll a apoprotein A2 × 3 （Q31LJ1） Photosystem I iron-sulfur center × 3 （Q31QV2） Photosystem I reaction center subunit II × 3 （Q31PI7） Photosystem I reaction center subunit IV × 3 （Q31NL7） Photosystem I PsaI protein × 3 （P95823） Photosystem I reaction center subunit IX × 3 （Q31NU0） Photosystem I reaction center subunit PsaK × 3 （Q31PR9） Photosystem I reaction center subunit XI × 3 （P95822） PsaM × 3 Flavodoxin × 3 （P10340） Iron stress-induced chlorophyll-binding protein × 18 （P15347） CHLOROPHYLL A × 594 PHYLLOQUINONE × 6 IRON/SULFUR CLUSTER × 9 BETA-CAROTENE × 144 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE × 45 DODECYL-ALPHA-D-MALTOSIDE × 12 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE × 6 1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL × 24 FLAVIN MONONUCLEOTIDE × 3 water × 12	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q31NT9_SYNE7
Isoform	—
PDB entities	6
Chains and sequence ranges	Author chain F； PDBConstruct 1–159； UniProt 1–159 Author chain R； PDBConstruct 1–159； UniProt 1–159 Author chain j； PDBConstruct 1–159； UniProt 1–159

Photosystem I PsaI protein

OrganismNot specified

UniProt P95823

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 54	Photosystem I P700 chlorophyll a apoprotein A1 × 3 （Q31LJ0） Photosystem I P700 chlorophyll a apoprotein A2 × 3 （Q31LJ1） Photosystem I iron-sulfur center × 3 （Q31QV2） Photosystem I reaction center subunit II × 3 （Q31PI7） Photosystem I reaction center subunit IV × 3 （Q31NL7） Photosystem I reaction center subunit III × 3 （Q31NT9） Photosystem I reaction center subunit IX × 3 （Q31NU0） Photosystem I reaction center subunit PsaK × 3 （Q31PR9） Photosystem I reaction center subunit XI × 3 （P95822） PsaM × 3 Flavodoxin × 3 （P10340） Iron stress-induced chlorophyll-binding protein × 18 （P15347） CHLOROPHYLL A × 594 PHYLLOQUINONE × 6 IRON/SULFUR CLUSTER × 9 BETA-CAROTENE × 144 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE × 45 DODECYL-ALPHA-D-MALTOSIDE × 12 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE × 6 1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL × 24 FLAVIN MONONUCLEOTIDE × 3 water × 12	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	P95823_SYNE7
Isoform	—
PDB entities	7
Chains and sequence ranges	Author chain I； PDBConstruct 1–38； UniProt 1–38 Author chain S； PDBConstruct 1–38； UniProt 1–38 Author chain k； PDBConstruct 1–38； UniProt 1–38

Photosystem I reaction center subunit IX

OrganismNot specified

UniProt Q31NU0

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 54	Photosystem I P700 chlorophyll a apoprotein A1 × 3 （Q31LJ0） Photosystem I P700 chlorophyll a apoprotein A2 × 3 （Q31LJ1） Photosystem I iron-sulfur center × 3 （Q31QV2） Photosystem I reaction center subunit II × 3 （Q31PI7） Photosystem I reaction center subunit IV × 3 （Q31NL7） Photosystem I reaction center subunit III × 3 （Q31NT9） Photosystem I PsaI protein × 3 （P95823） Photosystem I reaction center subunit PsaK × 3 （Q31PR9） Photosystem I reaction center subunit XI × 3 （P95822） PsaM × 3 Flavodoxin × 3 （P10340） Iron stress-induced chlorophyll-binding protein × 18 （P15347） CHLOROPHYLL A × 594 PHYLLOQUINONE × 6 IRON/SULFUR CLUSTER × 9 BETA-CAROTENE × 144 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE × 45 DODECYL-ALPHA-D-MALTOSIDE × 12 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE × 6 1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL × 24 FLAVIN MONONUCLEOTIDE × 3 water × 12	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PSAJ_SYNE7
Isoform	—
PDB entities	8
Chains and sequence ranges	Author chain J； PDBConstruct 1–41； UniProt 1–41 Author chain T； PDBConstruct 1–41； UniProt 1–41 Author chain l； PDBConstruct 1–41； UniProt 1–41

Photosystem I reaction center subunit PsaK

OrganismNot specified

UniProt Q31PR9

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 54	Photosystem I P700 chlorophyll a apoprotein A1 × 3 （Q31LJ0） Photosystem I P700 chlorophyll a apoprotein A2 × 3 （Q31LJ1） Photosystem I iron-sulfur center × 3 （Q31QV2） Photosystem I reaction center subunit II × 3 （Q31PI7） Photosystem I reaction center subunit IV × 3 （Q31NL7） Photosystem I reaction center subunit III × 3 （Q31NT9） Photosystem I PsaI protein × 3 （P95823） Photosystem I reaction center subunit IX × 3 （Q31NU0） Photosystem I reaction center subunit XI × 3 （P95822） PsaM × 3 Flavodoxin × 3 （P10340） Iron stress-induced chlorophyll-binding protein × 18 （P15347） CHLOROPHYLL A × 594 PHYLLOQUINONE × 6 IRON/SULFUR CLUSTER × 9 BETA-CAROTENE × 144 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE × 45 DODECYL-ALPHA-D-MALTOSIDE × 12 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE × 6 1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL × 24 FLAVIN MONONUCLEOTIDE × 3 water × 12	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q31PR9_SYNE7
Isoform	—
PDB entities	9
Chains and sequence ranges	Author chain K； PDBConstruct 1–84； UniProt 1–84 Author chain U； PDBConstruct 1–84； UniProt 1–84 Author chain m； PDBConstruct 1–84； UniProt 1–84

Photosystem I reaction center subunit XI

OrganismNot specified

UniProt P95822

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 54	Photosystem I P700 chlorophyll a apoprotein A1 × 3 （Q31LJ0） Photosystem I P700 chlorophyll a apoprotein A2 × 3 （Q31LJ1） Photosystem I iron-sulfur center × 3 （Q31QV2） Photosystem I reaction center subunit II × 3 （Q31PI7） Photosystem I reaction center subunit IV × 3 （Q31NL7） Photosystem I reaction center subunit III × 3 （Q31NT9） Photosystem I PsaI protein × 3 （P95823） Photosystem I reaction center subunit IX × 3 （Q31NU0） Photosystem I reaction center subunit PsaK × 3 （Q31PR9） PsaM × 3 Flavodoxin × 3 （P10340） Iron stress-induced chlorophyll-binding protein × 18 （P15347） CHLOROPHYLL A × 594 PHYLLOQUINONE × 6 IRON/SULFUR CLUSTER × 9 BETA-CAROTENE × 144 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE × 45 DODECYL-ALPHA-D-MALTOSIDE × 12 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE × 6 1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL × 24 FLAVIN MONONUCLEOTIDE × 3 water × 12	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PSAL_SYNE7
Isoform	—
PDB entities	10
Chains and sequence ranges	Author chain L； PDBConstruct 1–166； UniProt 1–166 Author chain V； PDBConstruct 1–166； UniProt 1–166 Author chain n； PDBConstruct 1–166； UniProt 1–166

Flavodoxin

Synechococcus elongatus (strain PCC 7942)

UniProt P10340

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 54	Photosystem I P700 chlorophyll a apoprotein A1 × 3 （Q31LJ0） Photosystem I P700 chlorophyll a apoprotein A2 × 3 （Q31LJ1） Photosystem I iron-sulfur center × 3 （Q31QV2） Photosystem I reaction center subunit II × 3 （Q31PI7） Photosystem I reaction center subunit IV × 3 （Q31NL7） Photosystem I reaction center subunit III × 3 （Q31NT9） Photosystem I PsaI protein × 3 （P95823） Photosystem I reaction center subunit IX × 3 （Q31NU0） Photosystem I reaction center subunit PsaK × 3 （Q31PR9） Photosystem I reaction center subunit XI × 3 （P95822） PsaM × 3 Iron stress-induced chlorophyll-binding protein × 18 （P15347） CHLOROPHYLL A × 594 PHYLLOQUINONE × 6 IRON/SULFUR CLUSTER × 9 BETA-CAROTENE × 144 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE × 45 DODECYL-ALPHA-D-MALTOSIDE × 12 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE × 6 1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL × 24 FLAVIN MONONUCLEOTIDE × 3 water × 12	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	FLAV_SYNE7
Isoform	—
PDB entities	12
Chains and sequence ranges	Author chain P； PDBConstruct 4–172； UniProt 2–170 Author chain X； PDBConstruct 4–172； UniProt 2–170 Author chain p； PDBConstruct 4–172； UniProt 2–170

Iron stress-induced chlorophyll-binding protein

OrganismNot specified

UniProt P15347

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 54	Photosystem I P700 chlorophyll a apoprotein A1 × 3 （Q31LJ0） Photosystem I P700 chlorophyll a apoprotein A2 × 3 （Q31LJ1） Photosystem I iron-sulfur center × 3 （Q31QV2） Photosystem I reaction center subunit II × 3 （Q31PI7） Photosystem I reaction center subunit IV × 3 （Q31NL7） Photosystem I reaction center subunit III × 3 （Q31NT9） Photosystem I PsaI protein × 3 （P95823） Photosystem I reaction center subunit IX × 3 （Q31NU0） Photosystem I reaction center subunit PsaK × 3 （Q31PR9） Photosystem I reaction center subunit XI × 3 （P95822） PsaM × 3 Flavodoxin × 3 （P10340） CHLOROPHYLL A × 594 PHYLLOQUINONE × 6 IRON/SULFUR CLUSTER × 9 BETA-CAROTENE × 144 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE × 45 DODECYL-ALPHA-D-MALTOSIDE × 12 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE × 6 1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL × 24 FLAVIN MONONUCLEOTIDE × 3 water × 12	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	ISIA_SYNE7
Isoform	—
PDB entities	13
Chains and sequence ranges	Author chain 1； PDBConstruct 1–342； UniProt 1–342 Author chain 2； PDBConstruct 1–342； UniProt 1–342 Author chain 3； PDBConstruct 1–342； UniProt 1–342 Author chain 4； PDBConstruct 1–342； UniProt 1–342 Author chain 5； PDBConstruct 1–342； UniProt 1–342 Author chain 6； PDBConstruct 1–342； UniProt 1–342 Author chain Y； PDBConstruct 1–342； UniProt 1–342 Author chain Z； PDBConstruct 1–342； UniProt 1–342 Author chain a； PDBConstruct 1–342； UniProt 1–342 Author chain b； PDBConstruct 1–342； UniProt 1–342 Author chain c； PDBConstruct 1–342； UniProt 1–342 Author chain d； PDBConstruct 1–342； UniProt 1–342 Author chain q； PDBConstruct 1–342； UniProt 1–342 Author chain r； PDBConstruct 1–342； UniProt 1–342 Author chain s； PDBConstruct 1–342； UniProt 1–342 Author chain t； PDBConstruct 1–342； UniProt 1–342 Author chain u； PDBConstruct 1–342； UniProt 1–342 Author chain v； PDBConstruct 1–342； UniProt 1–342

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	6kif
Deposition date deposition_date	2019-07-18
Structure title title	Structure of cyanobacterial photosystem I-IsiA-flavodoxin supercomplex
Keywords keywords	Photosystem, Antenna, Chlorophyll-binding protein, Membrane protein, Photosynthesis, iron stress-induced protein A, Flavodoxin; 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.

6kif__assembly_1__model_1

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

Download this curve (.dat)

6kif__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

6kif__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	96.34 Å
Rg (electron density)	95.34 Å
Total Rg	94.86 Å
Atom count	144258
Residues	13395
Excluded volume	2681600 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`6kif__assembly_1__model_1`	54-meric （54）	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 (23)

Entity 1 Entity 1 polymer

Description description	Photosystem I P700 chlorophyll a apoprotein A1
Molecular weight formula_weight	83994.3 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	A,G,e
Atom count atom_count	144312

MTISPPEREAKVKATVDKNPVPTSFEKWGKPGHFDRTLAKGPKTTTWIWNLHANAHDFDSHTSDLEDISRKIFSAHFGHLAVIFIWLSGAYFHGARFSNFSGWLADPTHVKPSAQVVWPIFGQEILNGDVGGGFHGIQITSGLFQLWRASGYTNEFQLYVTAIGALVMAGLMLFAGWFHYHKAAPKLEWFQNVESMLNHHLAGLLGLGSLSWAGHQIHVSLPVNKLLDAIDAGEPLVLNGKTIASAADIPLPHEFLDVSLISQLFPGFEAGVKAFFTLNWSAYADFLTFKGGLNPVTGGLWLTDTAHHHLAIAVLFIVAGHMYRTNWGIGHSLKEILEAHKGPFTGQGHKGLYEILTTSWHAQLSINLAILGSISIIVAHHMYAMPPYPYLATDYPTMLSLFTHHIWIGGFLIVGAGAHAAIFMVRDYDPAKNVDNLLDRVLRHRDAIISHLNWVCIWLGFHSFGLYIHNDTMRALGRPQDMFSDSAIQLQPIFAQWIQNIHALAPGNTAPNALASVSQVFGGDVVAVGGKVAAAPIVLGTADFMVHHIHAFTIHVTALILLKGVLYARSSRLVPDKANLGFRFPCDGPGRGGTCQVSGWDHVFLGLFWMYNSLSIVIFHYSWKMQSDVWGSVLPDGSVAHIANGNFAQSALTINGWLRDFLWAQASQVITSYGSSTSAYGLLFLGAHFVWAFSLMFLFSGRGYWQELIESIVWAHNKLKVAPAIQPRALSIIQGRAVGVAHYLLGGIVTTWSFFLARIIAVG

Entity 2 Entity 2 polymer

Description description	Photosystem I P700 chlorophyll a apoprotein A2
Molecular weight formula_weight	81554.7 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	B,H,f

MATKFPKFSQDLAQDPTTRRIWYGIATAHDFESHDGMTEENLYQKIFASHFGHLAIIFLWVSGNLFHVAWQGNFEQWSQDPLHVRPIAHAIWDPHFGQGAIDAFTQAGASSPVNVAYSGVYHWWYTIGMRTNGDLYQGSIFLLILSALFLFAGWLHLQPKFRPSLSWFKNAESRLNHHLAGLFGFSSLAWTGHLVHVAIPEARGQHVGWDNFLSTLPHPAGLAPFFTGNWSVYAENPDTASHAFGTAEGAGTAILTFLGGFHPQTEALWLTDIAHHHLAIAVIFIIAGHMYRTNFGIGHSIKEILEAHKPPAGGLGAGHKGLYETLNNSLHFQLALALASLGVVTSLVAQHMYSMPPYAFIAKDYTTMAALYTHHQYIATFIMCGAFAHGAIFLIRDYDPEANKNNVLARVLEHKEAIISHLSWVSLFLGFHTLGLYVHNDVVVAFGTPEKQILIEPVFAQFVQAASGKALYGFNVLLANADSAATAASLGTYLPNWLDAINSGKTALFLPIGPGDFLVHHAIALGLHTTTLILVKGALDARGSKLMPDKKDFGYSFPCDGPGRGGTCDISAWDAFYLAVFWALNTVGWVTFYWHWKNLTVWQGNVAQFNESSTYLMGWLRDYLWLNSSQLINGYNPFGTNNLSVWSWMFLFGHLIWATGFMFLISWRGYWQELIETIVWAHQRTPLANIVGWKDKPVALSIVQARVVGLAHFTVGYFLTYAAFLIASTAGKFG

Entity 3 Entity 3 polymer

Description description	Photosystem I iron-sulfur center
Molecular weight formula_weight	8807.2 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	C,N,g

MSHSVKIYDTCIGCTQCVRACPLDVLEMVPWDGCKAGQIAASPRTEDCVGCKRCETACPTDFLSIRVYLGAETTRSMGLAY

Entity 4 Entity 4 polymer

Description description	Photosystem I reaction center subunit II
Molecular weight formula_weight	15536.6 kDa
Source method src_method	nat
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	D,O,h

AETLTGKTPVFGGSTGGLLKSAETEEKYAITWTSTKEQVFELPTGGAAVMHEGDNLLYFARKEQALALGTQLRTKFKPKIESYKIYRVFPGGDVEYLHPKDGVFPEKVNEGRSFAGKVDRRIGQNPNPATIKFTGKQPYTA

Entity 5 Entity 5 polymer

Description description	Photosystem I reaction center subunit IV
Molecular weight formula_weight	8147.1 kDa
Source method src_method	nat
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	E,Q,i

MAIARGDKVRILRPESYWFNEVGTVASVDQSGIKYPVVVRFEKVNYNGFSGSDGGVNTNNFAEAELQVVAAAAKK

Entity 6 Entity 6 polymer

Description description	Photosystem I reaction center subunit III
Molecular weight formula_weight	17125.7 kDa
Source method src_method	nat
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	F,R,j

MRRLFAVVLAACLWLGFAPQASADVAGLTPCSESPRFIQRAEAAATPQAKARFENYSQALCGADGLPHLIVDGRLDHAGDFIIPSLLFLYIAGWIGWVGRSYLQAIKSDKDAAGKEIVIDVPLAVKFSLTGFAWPLAAFQEFSSGKLLAKADEITVSPR

Entity 7 Entity 7 polymer

Description description	Photosystem I PsaI protein
Molecular weight formula_weight	4002.7 kDa
Source method src_method	nat
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	I,S,k

MSGDFAAAFLPTIFVPLVGLGLPAVLMSLLFTYIESEA

Entity 8 Entity 8 polymer

Description description	Photosystem I reaction center subunit IX
Molecular weight formula_weight	4713.6 kDa
Source method src_method	nat
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	J,T,l

MDGLKRYLSSAPILATIWFAITAGILIEFNRFFPDLLFHPL

Entity 9 Entity 9 polymer

Description description	Photosystem I reaction center subunit PsaK
Molecular weight formula_weight	8397.1 kDa
Source method src_method	nat
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	K,U,m

MLPVLAAIPQTVAWSPKVALVMILSNIVAIAIGKATIKIQNAGPALPSPQLFGGFGLPAVLATASFGHILGIGVILGLANIGNL

Entity 10 Entity 10 polymer

Description description	Photosystem I reaction center subunit XI
Molecular weight formula_weight	17302.7 kDa
Source method src_method	nat
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	L,V,n

MAQDVIANGGTPEIGNLATPINSSPFTRTFINALPIYRRGLSSNRRGLEIGMAHGFLLYGPFSILGPLRNTETAGSAGLLATVGLVVILTVCLSLYGNAGSGPSAAESTVTTPNPPQELFTKEGWSEFTSGFILGGLGGAFFAFYLASTPYVQPLVKIAAGVWSVH

Entity 11 Entity 11 polymer

Description description	PsaM
Molecular weight formula_weight	3239.9 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	M,W,o

MTDTQVFVALLLALVPAVLAYRLGTELYR

Entity 12 Entity 12 polymer

Description description	Flavodoxin
Molecular weight formula_weight	18938.6 kDa
Source method src_method	man
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	P,X,p

GSHAKIGLFYGTQTGVTQTIAESIQQEFGGESIVDLNDIANADASDLNAYDYLIIGCPTWNVGELQSDWEGIYDDLDSVNFQGKKVAYFGAGDQVGYSDNFQDAMGILEEKISSLGSQTVGYWPIEGYDFNESKAVRNNQFVGLAIDEDNQPDLTKNRIKTWVSQLKSEFGL

Source Source

Source organism organism	Synechococcus elongatus (strain PCC 7942)
NCBI taxonomy ID ncbi_taxonomy_id	1140
Host organism host_organism	Escherichia coli

Entity 13 Entity 13 polymer

Description description	Iron stress-induced chlorophyll-binding protein
Molecular weight formula_weight	37004.5 kDa
Source method src_method	nat
Copy count entity_count	18

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	1,2,3,4,5,6,Y,Z,a,b,c,d,q,r,s,t,u,v

MQTYNNPEVTYDWWAGNARFANLSGLFIAAHVAQAALIMFWAGAFTLYEISWLTADQSMGEQGLILLPHLATLGLGVGDGGQVTDTYPLFVVGAVHLIASAVLGAGALFHTFRAPSDLAAASGAAKRFHFDWNDPKQLGLILGHHLLFLGVGALLLVAKATTWGGLYDAASQTVRLVTEPTLNPAVIYGYQTHFASIDNLEDLVGGHVYVGVMLIAGGIWHILVPPFQWTKKVLIYSGEAILSYSLGGIALAGFVAAYFCAVNTLAYPVEFYGAPLEIKLGVTPYFADTVQLPFGAHTPRAWLSNAHFFLAFFCLQGHLWHALRAMGFDFRRVEKALSSVEA

Entity 14 Entity 14 non-polymer

Description description	CHLOROPHYLL A
Molecular weight formula_weight	893.5 kDa
Source method src_method	syn
Copy count entity_count	594

Entity 15 Entity 15 non-polymer

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

Entity 16 Entity 16 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 17 Entity 17 non-polymer

Description description	BETA-CAROTENE
Molecular weight formula_weight	536.9 kDa
Source method src_method	syn
Copy count entity_count	144

Entity 18 Entity 18 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	45

Entity 19 Entity 19 non-polymer

Description description	DODECYL-ALPHA-D-MALTOSIDE
Molecular weight formula_weight	510.6 kDa
Source method src_method	syn
Copy count entity_count	12

Entity 20 Entity 20 non-polymer

Description description	1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE
Molecular weight formula_weight	787.2 kDa
Source method src_method	syn
Copy count entity_count	6

Entity 21 Entity 21 non-polymer

Description description	1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL
Molecular weight formula_weight	795.1 kDa
Source method src_method	syn
Copy count entity_count	24

Entity 22 Entity 22 non-polymer

Description description	FLAVIN MONONUCLEOTIDE
Molecular weight formula_weight	456.3 kDa
Source method src_method	syn
Copy count entity_count	3

Entity 23 Entity 23 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	54

▶

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	3.30 Å
Resolution测定Method resolution_method	—
颗粒数 num_particles	29295

Structure of cyanobacterial photosystem I-IsiA-flavodoxin supercomplex

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 PsaI protein

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