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- EMDB-32193: STRUCTURE OF PHOTOSYNTHETIC LH1-RC SUPER-COMPLEX OF RHODOBACTER S... -

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Entry
Database: EMDB / ID: EMD-32193
TitleSTRUCTURE OF PHOTOSYNTHETIC LH1-RC SUPER-COMPLEX OF RHODOBACTER SPHAEROIDES LACKING PROTEIN-U
Map data
Sample
  • Complex: Photosynthetic LH1-RC complex from the purple phototrophic bacterium Rhodobacter sphaeroides monomer lacking protein-U
    • Complex: Rhodobacter sphaeroides monomeric LH1-RC Complex lacking protein-U
      • Protein or peptide: x 6 types
  • Ligand: x 10 types
KeywordsLH1-RC COMPLEX / PHOTOSYNTHESIS / PURPLE BACTERIA
Function / homology
Function and homology information


organelle inner membrane / plasma membrane-derived chromatophore membrane / plasma membrane light-harvesting complex / bacteriochlorophyll binding / photosynthetic electron transport in photosystem II / : / photosynthesis, light reaction / membrane => GO:0016020 / metal ion binding / plasma membrane
Similarity search - Function
Intrinsic membrane protein family, PufX / Intrinsic membrane protein PufX / Antenna complex, beta subunit, conserved site / Antenna complexes beta subunits signature. / Antenna complex, alpha subunit / Antenna complex, alpha subunit conserved site / Antenna complexes alpha subunits signature. / Antenna complex, alpha/beta subunit / Light-harvesting protein B beta chain / Antenna complex, beta domain superfamily ...Intrinsic membrane protein family, PufX / Intrinsic membrane protein PufX / Antenna complex, beta subunit, conserved site / Antenna complexes beta subunits signature. / Antenna complex, alpha subunit / Antenna complex, alpha subunit conserved site / Antenna complexes alpha subunits signature. / Antenna complex, alpha/beta subunit / Light-harvesting protein B beta chain / Antenna complex, beta domain superfamily / Antenna complex alpha/beta subunit / Light-harvesting complex / Photosynthetic reaction centre, H subunit / Bacterial photosynthetic reaction centre, H-chain, C-terminal / Photosynthetic reaction centre, M subunit / Photosynthetic reaction centre, H subunit, N-terminal / PRC-barrel domain / Photosynthetic reaction centre, H subunit, N-terminal domain superfamily / Photosynthetic reaction centre, H-chain N-terminal region / PRC-barrel domain / Photosynthetic reaction centre, L subunit / PRC-barrel-like superfamily / Photosynthetic reaction centre, L/M / Photosystem II protein D1/D2 superfamily / Photosynthetic reaction centre protein / Photosynthetic reaction center proteins signature.
Similarity search - Domain/homology
Intrinsic membrane protein PufX / Reaction center protein L chain / Antenna pigment protein beta chain / Reaction center protein M chain / Photosynthetic reaction center subunit H / Antenna pigment protein alpha chain
Similarity search - Component
Biological speciesRhodobacter sphaeroides f. sp. denitrificans (bacteria)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.63 Å
AuthorsTani K / Kanno R
Funding support Japan, 6 items
OrganizationGrant numberCountry
Japan Agency for Medical Research and Development (AMED)JP21am0101118 Japan
Japan Agency for Medical Research and Development (AMED)JP21am0101116 Japan
Japan Society for the Promotion of Science (JSPS)JP16H04174 Japan
Japan Society for the Promotion of Science (JSPS)JP18H05153 Japan
Japan Society for the Promotion of Science (JSPS)20H05086 Japan
Japan Society for the Promotion of Science (JSPS)20H02856 Japan
CitationJournal: Nat Commun / Year: 2022
Title: Asymmetric structure of the native Rhodobacter sphaeroides dimeric LH1-RC complex.
Authors: Kazutoshi Tani / Ryo Kanno / Riku Kikuchi / Saki Kawamura / Kenji V P Nagashima / Malgorzata Hall / Ai Takahashi / Long-Jiang Yu / Yukihiro Kimura / Michael T Madigan / Akira Mizoguchi / ...Authors: Kazutoshi Tani / Ryo Kanno / Riku Kikuchi / Saki Kawamura / Kenji V P Nagashima / Malgorzata Hall / Ai Takahashi / Long-Jiang Yu / Yukihiro Kimura / Michael T Madigan / Akira Mizoguchi / Bruno M Humbel / Zheng-Yu Wang-Otomo /
Abstract: Rhodobacter sphaeroides is a model organism in bacterial photosynthesis, and its light-harvesting-reaction center (LH1-RC) complex contains both dimeric and monomeric forms. Here we present cryo-EM ...Rhodobacter sphaeroides is a model organism in bacterial photosynthesis, and its light-harvesting-reaction center (LH1-RC) complex contains both dimeric and monomeric forms. Here we present cryo-EM structures of the native LH1-RC dimer and an LH1-RC monomer lacking protein-U (ΔU). The native dimer reveals several asymmetric features including the arrangement of its two monomeric components, the structural integrity of protein-U, the overall organization of LH1, and rigidities of the proteins and pigments. PufX plays a critical role in connecting the two monomers in a dimer, with one PufX interacting at its N-terminus with another PufX and an LH1 β-polypeptide in the other monomer. One protein-U was only partially resolved in the dimeric structure, signaling different degrees of disorder in the two monomers. The ΔU LH1-RC monomer was half-moon-shaped and contained 11 α- and 10 β-polypeptides, indicating a critical role for protein-U in controlling the number of αβ-subunits required for dimer assembly and stabilization. These features are discussed in relation to membrane topology and an assembly model proposed for the native dimeric complex.
History
DepositionNov 13, 2021-
Header (metadata) releaseApr 27, 2022-
Map releaseApr 27, 2022-
UpdateNov 13, 2024-
Current statusNov 13, 2024Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_32193.png

Downloads & links

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Map

FileDownload / File: emd_32193.map.gz / Format: CCP4 / Size: 178 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.82 Å/pix.
x 360 pix.
= 295.2 Å		0.82 Å/pix.
x 360 pix.
= 295.2 Å		0.82 Å/pix.
x 360 pix.
= 295.2 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.82 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.03
Minimum - Maximum-0.14589596 - 0.26453406
Average (Standard dev.)0.00002458155 (±0.007955379)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions360360360
Spacing360360360
CellA=B=C: 295.2 Å
α=β=γ: 90.0 °

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Supplemental data

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Sample components

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Entire : Photosynthetic LH1-RC complex from the purple phototrophic bacter...

EntireName: Photosynthetic LH1-RC complex from the purple phototrophic bacterium Rhodobacter sphaeroides monomer lacking protein-U
Components
  • Complex: Photosynthetic LH1-RC complex from the purple phototrophic bacterium Rhodobacter sphaeroides monomer lacking protein-U
    • Complex: Rhodobacter sphaeroides monomeric LH1-RC Complex lacking protein-U
      • Protein or peptide: Photosynthetic reaction center L subunit
      • Protein or peptide: Reaction center protein M chain
      • Protein or peptide: Photosynthetic reaction center subunit H
      • Protein or peptide: Antenna pigment protein alpha chain
      • Protein or peptide: Antenna pigment protein beta chain
      • Protein or peptide: PufX
  • Ligand: BACTERIOCHLOROPHYLL A
  • Ligand: BACTERIOPHEOPHYTIN A
  • Ligand: UBIQUINONE-10
  • Ligand: (1R)-2-{[{[(2S)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL (11E)-OCTADEC-11-ENOATE
  • Ligand: LAURYL DIMETHYLAMINE-N-OXIDE
  • Ligand: DODECYL-BETA-D-MALTOSIDE
  • Ligand: FE (III) ION
  • Ligand: SPHEROIDENE
  • Ligand: CARDIOLIPIN
  • Ligand: PHOSPHATIDYLETHANOLAMINE

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Supramolecule #1: Photosynthetic LH1-RC complex from the purple phototrophic bacter...

SupramoleculeName: Photosynthetic LH1-RC complex from the purple phototrophic bacterium Rhodobacter sphaeroides monomer lacking protein-U
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#6
Source (natural)Organism: Rhodobacter sphaeroides f. sp. denitrificans (bacteria)
Strain: IL106

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Supramolecule #2: Rhodobacter sphaeroides monomeric LH1-RC Complex lacking protein-U

SupramoleculeName: Rhodobacter sphaeroides monomeric LH1-RC Complex lacking protein-U
type: complex / ID: 2 / Parent: 1 / Macromolecule list: #1-#6
Source (natural)Organism: Rhodobacter sphaeroides f. sp. denitrificans (bacteria)
Strain: IL106

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Macromolecule #1: Photosynthetic reaction center L subunit

MacromoleculeName: Photosynthetic reaction center L subunit / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Rhodobacter sphaeroides f. sp. denitrificans (bacteria)
Molecular weightTheoretical: 31.360416 KDa
SequenceString: ALLSFERKYR VPGGTLVGGN LFDFWVGPFY VGFFGVATFF FAALGIILIA WSAVLQGTWN PQLISVYPPA LEYGLGGAPL AKGGLWQII TICATGAFVS WALREVEICR KLGIGYHIPF AFAFAILAYL TLVLFRPVMM GAWGYAFPYG IWTHLDWVSN T GYTYGNFH ...String:
ALLSFERKYR VPGGTLVGGN LFDFWVGPFY VGFFGVATFF FAALGIILIA WSAVLQGTWN PQLISVYPPA LEYGLGGAPL AKGGLWQII TICATGAFVS WALREVEICR KLGIGYHIPF AFAFAILAYL TLVLFRPVMM GAWGYAFPYG IWTHLDWVSN T GYTYGNFH YNPAHMIAIT FFFTNALALA LHGALVLSAA NPEKGKEMRT PDHEDTFFRD LVGYSIGTLG IHRLGLLLSL SA VFFSALC MIITGTIWFD QWVDWWQWWV KLPWWANIPG GING

UniProtKB: Reaction center protein L chain

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Macromolecule #2: Reaction center protein M chain

MacromoleculeName: Reaction center protein M chain / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Rhodobacter sphaeroides f. sp. denitrificans (bacteria)
Molecular weightTheoretical: 34.412566 KDa
SequenceString: AEYQNIFTQV QVRGPADLGM TEDVNLANRS GVGPFSTLLG WFGNAQLGPI YLGSLGVLSL FSGLMWFFTI GIWFWYQAGW NPAVFLRDL FFFSLEPPAP EYGLSFAAPL KEGGLWLIAS FFMFVAVWSW WGRTYLRAQA LGMGKHTAWA FLSAIWLWMV L GFIRPILM ...String:
AEYQNIFTQV QVRGPADLGM TEDVNLANRS GVGPFSTLLG WFGNAQLGPI YLGSLGVLSL FSGLMWFFTI GIWFWYQAGW NPAVFLRDL FFFSLEPPAP EYGLSFAAPL KEGGLWLIAS FFMFVAVWSW WGRTYLRAQA LGMGKHTAWA FLSAIWLWMV L GFIRPILM GSWSEAVPYG IFSHLDWTNN FSLVHGNLFY NPFHGLSIAF LYGSALLFAM HGATILAVSR FGGERELEQI AD RGTAAER AALFWRWTMG FNATMEGIHR WAIWMAVLVT LTGGIGILLS GTVVDNWYVW GQNHGMAPLN

UniProtKB: Reaction center protein M chain

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Macromolecule #3: Photosynthetic reaction center subunit H

MacromoleculeName: Photosynthetic reaction center subunit H / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Rhodobacter sphaeroides f. sp. denitrificans (bacteria)
Molecular weightTheoretical: 28.09135 KDa
SequenceString: MVGVTAFGNF DLASLAIYSF WIFLAGLIYY LQTENMREGY PLENEDGTPA ANQGPFPLPK PKTFILPHGR GTLTVPGPES EDRPIALAR TAVSEGFPHA PTGDPMKDGV GPASWVARRD LPELDGHGHN KIKPMKAAAG FYVSAGKNPI GLPVRGCDLE I AGKVVDIW ...String:
MVGVTAFGNF DLASLAIYSF WIFLAGLIYY LQTENMREGY PLENEDGTPA ANQGPFPLPK PKTFILPHGR GTLTVPGPES EDRPIALAR TAVSEGFPHA PTGDPMKDGV GPASWVARRD LPELDGHGHN KIKPMKAAAG FYVSAGKNPI GLPVRGCDLE I AGKVVDIW VDIPEQMARF LEVELKDGST RLLPMQMVKV QSNRVHVNAL SSDLFAGIPT IKSPTEVTLL EEDKICGYVA GG LMYAAPK RKSVVAAMLA EYA

UniProtKB: Photosynthetic reaction center subunit H

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Macromolecule #4: Antenna pigment protein alpha chain

MacromoleculeName: Antenna pigment protein alpha chain / type: protein_or_peptide / ID: 4 / Number of copies: 11 / Enantiomer: LEVO
Source (natural)Organism: Rhodobacter sphaeroides f. sp. denitrificans (bacteria)
Molecular weightTheoretical: 6.47378 KDa
SequenceString:
(FME)SKFYKIWMI FDPRRVFVAQ GVFLFLLAVM IHLILLSTPS YNWLEISAAK YNRV

UniProtKB: Antenna pigment protein alpha chain

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Macromolecule #5: Antenna pigment protein beta chain

MacromoleculeName: Antenna pigment protein beta chain / type: protein_or_peptide / ID: 5 / Number of copies: 10 / Enantiomer: LEVO
Source (natural)Organism: Rhodobacter sphaeroides f. sp. denitrificans (bacteria)
Molecular weightTheoretical: 5.461166 KDa
SequenceString:
ADKSDLGYTG LTDEQAQELH SVYMSGLWLF SAVAIVAHLA VYIWRPWF

UniProtKB: Antenna pigment protein beta chain

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Macromolecule #6: PufX

MacromoleculeName: PufX / type: protein_or_peptide / ID: 6 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Rhodobacter sphaeroides f. sp. denitrificans (bacteria)
Molecular weightTheoretical: 8.886395 KDa
SequenceString:
ADKTIFNDHL NTNPKTNLRL WVAFQMMKGA GWAGGVFFGT LLLIGFFRVV GRMLPIDENP APAPNITGAL ETGIELIKHL V

UniProtKB: Intrinsic membrane protein PufX

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Macromolecule #7: BACTERIOCHLOROPHYLL A

MacromoleculeName: BACTERIOCHLOROPHYLL A / type: ligand / ID: 7 / Number of copies: 25 / Formula: BCL
Molecular weightTheoretical: 911.504 Da
Chemical component information

ChemComp-BCL:
BACTERIOCHLOROPHYLL A

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Macromolecule #8: BACTERIOPHEOPHYTIN A

MacromoleculeName: BACTERIOPHEOPHYTIN A / type: ligand / ID: 8 / Number of copies: 2 / Formula: BPH
Molecular weightTheoretical: 889.215 Da
Chemical component information

ChemComp-BPH:
BACTERIOPHEOPHYTIN A

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Macromolecule #9: UBIQUINONE-10

MacromoleculeName: UBIQUINONE-10 / type: ligand / ID: 9 / Number of copies: 4 / Formula: U10
Molecular weightTheoretical: 863.343 Da
Chemical component information

ChemComp-U10:
UBIQUINONE-10

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Macromolecule #10: (1R)-2-{[{[(2S)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-...

MacromoleculeName: (1R)-2-{[{[(2S)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL (11E)-OCTADEC-11-ENOATE
type: ligand / ID: 10 / Number of copies: 8 / Formula: PGV
Molecular weightTheoretical: 749.007 Da
Chemical component information

ChemComp-PGV:
(1R)-2-{[{[(2S)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL (11E)-OCTADEC-11-ENOATE / phospholipid*YM

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Macromolecule #11: LAURYL DIMETHYLAMINE-N-OXIDE

MacromoleculeName: LAURYL DIMETHYLAMINE-N-OXIDE / type: ligand / ID: 11 / Number of copies: 4 / Formula: LDA
Molecular weightTheoretical: 229.402 Da
Chemical component information

ChemComp-LDA:
LAURYL DIMETHYLAMINE-N-OXIDE / LDAO, detergent*YM

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Macromolecule #12: DODECYL-BETA-D-MALTOSIDE

MacromoleculeName: DODECYL-BETA-D-MALTOSIDE / type: ligand / ID: 12 / Number of copies: 17 / Formula: LMT
Molecular weightTheoretical: 510.615 Da
Chemical component information

ChemComp-LMT:
DODECYL-BETA-D-MALTOSIDE / detergent*YM

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Macromolecule #13: FE (III) ION

MacromoleculeName: FE (III) ION / type: ligand / ID: 13 / Number of copies: 1 / Formula: FE
Molecular weightTheoretical: 55.845 Da

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Macromolecule #14: SPHEROIDENE

MacromoleculeName: SPHEROIDENE / type: ligand / ID: 14 / Number of copies: 19 / Formula: SPO
Molecular weightTheoretical: 568.914 Da
Chemical component information

ChemComp-7OT:
SPHEROIDENE

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Macromolecule #15: CARDIOLIPIN

MacromoleculeName: CARDIOLIPIN / type: ligand / ID: 15 / Number of copies: 3 / Formula: CDL
Molecular weightTheoretical: 1.464043 KDa
Chemical component information

ChemComp-CDL:
CARDIOLIPIN / phospholipid*YM

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Macromolecule #16: PHOSPHATIDYLETHANOLAMINE

MacromoleculeName: PHOSPHATIDYLETHANOLAMINE / type: ligand / ID: 16 / Number of copies: 2 / Formula: PTY
Molecular weightTheoretical: 734.039 Da
Chemical component information

ChemComp-PTY:
PHOSPHATIDYLETHANOLAMINE / phospholipid*YM

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration3.0 mg/mL
BufferpH: 8
VitrificationCryogen name: ETHANE / Chamber humidity: 80 % / Chamber temperature: 277 K / Instrument: LEICA EM GP
DetailsThis sample was monodisperse.

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: FEI FALCON III (4k x 4k) / Detector mode: COUNTING / Average exposure time: 1.275 sec. / Average electron dose: 42.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: NONE
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 2.63 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3.1) / Number images used: 124589
Initial angle assignmentType: NOT APPLICABLE
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3.1)
Final 3D classificationSoftware - Name: RELION (ver. 3.1)
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial modelPDB ID:

7f0l


Chain - Source name: PDB / Chain - Initial model type: experimental model
RefinementSpace: REAL / Protocol: RIGID BODY FIT / Overall B value: 60 / Target criteria: Correlation coefficient
Output model

PDB-7vy3:
STRUCTURE OF PHOTOSYNTHETIC LH1-RC SUPER-COMPLEX OF RHODOBACTER SPHAEROIDES LACKING PROTEIN-U

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