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9kzh

Cryo-EM structure of the RC complex from Rhodospirillum rubrum

Method: ELECTRON MICROSCOPY
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1. Protein Identity and Related Structures Protein Identity & Related Structures

Reaction center protein L chain

OrganismNot specified

UniProt P10717

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 3 Reaction center protein M chain × 1 （P10718） Photoreaction center protein H × 1 （Q7M149） Trans-Geranyl BACTERIOCHLOROPHYLL A × 4 Trans-Geranyl BACTERIOPHEOPHYTIN A × 2 UBIQUINONE-10 × 2 (1R)-2-{[{[(2S)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL (11E)-OCTADEC-11-ENOATE × 20 DODECYL-BETA-D-MALTOSIDE × 1 Octadecane × 7 DI-PALMITOYL-3-SN-PHOSPHATIDYLETHANOLAMINE × 5 FE (III) ION × 1 SPIRILLOXANTHIN × 1 ;2-azanyl-5-[(2~{E},6~{E},8~{E},10~{E},12~{E},14~{E},18~{E},22~{E},26~{E},30~{E},34~{E})-3,7,11,15,19,23,27,31,35,39-decamethyltetraconta-2,6,8,10,12,14,18,22,26,30,34,38-dodecaenyl]-3-methoxy-6-methyl-cyclohexa-2,5-diene-1,4-dione ; × 1 CARDIOLIPIN × 1 Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
7eqd 9k3q 9kzh

3 assemblies

View Construct and Data Evidence
UniProt name RCEL_RHORU
Isoform —
PDB entities 1
Chains and sequence ranges Author chain L； PDBConstruct 1–276； UniProt 1–276

Reaction center protein M chain

OrganismNot specified

UniProt P10718

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 3 Reaction center protein L chain × 1 （P10717） Photoreaction center protein H × 1 （Q7M149） Trans-Geranyl BACTERIOCHLOROPHYLL A × 4 Trans-Geranyl BACTERIOPHEOPHYTIN A × 2 UBIQUINONE-10 × 2 (1R)-2-{[{[(2S)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL (11E)-OCTADEC-11-ENOATE × 20 DODECYL-BETA-D-MALTOSIDE × 1 Octadecane × 7 DI-PALMITOYL-3-SN-PHOSPHATIDYLETHANOLAMINE × 5 FE (III) ION × 1 SPIRILLOXANTHIN × 1 ;2-azanyl-5-[(2~{E},6~{E},8~{E},10~{E},12~{E},14~{E},18~{E},22~{E},26~{E},30~{E},34~{E})-3,7,11,15,19,23,27,31,35,39-decamethyltetraconta-2,6,8,10,12,14,18,22,26,30,34,38-dodecaenyl]-3-methoxy-6-methyl-cyclohexa-2,5-diene-1,4-dione ; × 1 CARDIOLIPIN × 1 Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
9kzh

1 assemblies

View Construct and Data Evidence
UniProt name RCEM_RHORU
Isoform —
PDB entities 2
Chains and sequence ranges Author chain M； PDBConstruct 1–306； UniProt 1–306

Photoreaction center protein H

OrganismNot specified

UniProt Q7M149

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 3 Reaction center protein L chain × 1 （P10717） Reaction center protein M chain × 1 （P10718） Trans-Geranyl BACTERIOCHLOROPHYLL A × 4 Trans-Geranyl BACTERIOPHEOPHYTIN A × 2 UBIQUINONE-10 × 2 (1R)-2-{[{[(2S)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL (11E)-OCTADEC-11-ENOATE × 20 DODECYL-BETA-D-MALTOSIDE × 1 Octadecane × 7 DI-PALMITOYL-3-SN-PHOSPHATIDYLETHANOLAMINE × 5 FE (III) ION × 1 SPIRILLOXANTHIN × 1 ;2-azanyl-5-[(2~{E},6~{E},8~{E},10~{E},12~{E},14~{E},18~{E},22~{E},26~{E},30~{E},34~{E})-3,7,11,15,19,23,27,31,35,39-decamethyltetraconta-2,6,8,10,12,14,18,22,26,30,34,38-dodecaenyl]-3-methoxy-6-methyl-cyclohexa-2,5-diene-1,4-dione ; × 1 CARDIOLIPIN × 1 Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
7eqd 9k3q 9kzh

3 assemblies

View Construct and Data Evidence
UniProt name Q7M149_RHORU
Isoform —
PDB entities 3
Chains and sequence ranges Author chain H； PDBConstruct 1–257； UniProt 1–257

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_id9kzh
Deposition date deposition_date2024-12-10
Structure title titleCryo-EM structure of the RC complex from Rhodospirillum rubrum
Keywords keywordslight harvesting, photosynthesis, gene heterologous expression, Rhodospirillum rubrum, STRUCTURAL PROTEIN; STRUCTURAL PROTEIN
Experimental Method methodELECTRON 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.

9kzh__assembly_1__model_1

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

Download this curve (.dat)

9kzh__assembly_1__model_1 | I(q)

10-2 10-1 106 107 108 q (1/Angstrom) I(q)
100 plotted points; both axes use logarithmic scales.

9kzh__assembly_1__model_1 | P(r) · Pending

The new assembly/model P(r) has not been calculated yet This placeholder does not display legacy data r (Angstrom) P(r)
P(r) will be calculated and displayed separately for the same assembly/model.
Rg（Guinier）30.46 Å
Rg (electron density)29.28 Å
Total Rg30.67 Å
Atom count8317
Residues836
Excluded volume154160 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 9kzh__assembly_1__model_1 trimeric （3） 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 (14)

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7. Citations (1)