7OY8 | pdb_00007oy8

Cryo-EM structure of the Rhodospirillum rubrum RC-LH1 complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.50 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Starting Models: experimental
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wwPDB Validation 3D Report Full Report

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This is version 1.1 of the entry. See complete history

Literature

Cryo-EM structure of the Rhodospirillum rubrum RC-LH1 complex at 2.5 angstrom.

Qian, P.Croll, T.I.Swainsbury, D.J.K.Castro-Hartmann, P.Moriarty, N.W.Sader, K.Hunter, C.N.

(2021) Biochem J 478: 3253-3263

  • DOI: https://doi.org/10.1042/BCJ20210511
  • Primary Citation Related Structures: 
    7OY8

  • PubMed Abstract: 

    The reaction centre light-harvesting 1 (RC-LH1) complex is the core functional component of bacterial photosynthesis. We determined the cryo-electron microscopy (cryo-EM) structure of the RC-LH1 complex from Rhodospirillum rubrum at 2.5 Å resolution, which reveals a unique monomeric bacteriochlorophyll with a phospholipid ligand in the gap between the RC and LH1 complexes. The LH1 complex comprises a circular array of 16 αβ-polypeptide subunits that completely surrounds the RC, with a preferential binding site for a quinone, designated QP, on the inner face of the encircling LH1 complex. Quinols, initially generated at the RC QB site, are proposed to transiently occupy the QP site prior to traversing the LH1 barrier and diffusing to the cytochrome bc1 complex. Thus, the QP site, which is analogous to other such sites in recent cryo-EM structures of RC-LH1 complexes, likely reflects a general mechanism for exporting quinols from the RC-LH1 complex.


  • Organizational Affiliation
    • Materials and Structural Analysis, Thermo Fisher Scientific, Achtseweg Noord 5, 5651 GG Eindhoven, Netherlands.

Macromolecule Content 

  • Total Structure Weight: 339.53 kDa 
  • Atom Count: 22,902 
  • Modeled Residue Count: 2,293 
  • Deposited Residue Count: 2,515 
  • Unique protein chains: 6

Macromolecules

Find similar proteins by:|  3D Structure
Entity ID: 1
MoleculeChains  Sequence LengthOrganismDetailsImage
Light-harvesting protein B-870 beta chain54Rhodospirillum rubrum ATCC 11170Mutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for Q2RQ23 (Rhodospirillum rubrum (strain ATCC 11170 / ATH 1.1.1 / DSM 467 / LMG 4362 / NCIMB 8255 / S1))
Explore Q2RQ23 
Go to UniProtKB:  Q2RQ23
Entity Groups
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ2RQ23
Sequence Annotations
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Reference Sequence
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Entity ID: 2
MoleculeChains  Sequence LengthOrganismDetailsImage
Antenna complex, alpha/beta subunit50Rhodospirillum rubrum ATCC 11170Mutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for Q2RQ24 (Rhodospirillum rubrum (strain ATCC 11170 / ATH 1.1.1 / DSM 467 / LMG 4362 / NCIMB 8255 / S1))
Explore Q2RQ24 
Go to UniProtKB:  Q2RQ24
Entity Groups
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ2RQ24
Sequence Annotations
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Reference Sequence
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Entity ID: 3
MoleculeChains  Sequence LengthOrganismDetailsImage
Photosynthetic reaction center, H-chainO [auth H]257Rhodospirillum rubrum ATCC 11170Mutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for Q2RWS4 (Rhodospirillum rubrum (strain ATCC 11170 / ATH 1.1.1 / DSM 467 / LMG 4362 / NCIMB 8255 / S1))
Explore Q2RWS4 
Go to UniProtKB:  Q2RWS4
Entity Groups
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ2RWS4
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Reference Sequence
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Entity ID: 4
MoleculeChains  Sequence LengthOrganismDetailsImage
Photosynthetic reaction center L subunitS [auth L]276Rhodospirillum rubrum ATCC 11170Mutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for Q2RQ25 (Rhodospirillum rubrum (strain ATCC 11170 / ATH 1.1.1 / DSM 467 / LMG 4362 / NCIMB 8255 / S1))
Explore Q2RQ25 
Go to UniProtKB:  Q2RQ25
Entity Groups
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ2RQ25
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Reference Sequence
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Entity ID: 5
MoleculeChains  Sequence LengthOrganismDetailsImage
Reaction center protein M chainT [auth M]306Rhodospirillum rubrum ATCC 11170Mutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for Q2RQ26 (Rhodospirillum rubrum (strain ATCC 11170 / ATH 1.1.1 / DSM 467 / LMG 4362 / NCIMB 8255 / S1))
Explore Q2RQ26 
Go to UniProtKB:  Q2RQ26
Entity Groups
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ2RQ26
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Reference Sequence
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Entity ID: 6
MoleculeChains  Sequence LengthOrganismDetailsImage
Antenna complex, alpha/beta subunitX [auth R]62Rhodospirillum rubrum ATCC 11170Mutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for Q2RQ24 (Rhodospirillum rubrum (strain ATCC 11170 / ATH 1.1.1 / DSM 467 / LMG 4362 / NCIMB 8255 / S1))
Explore Q2RQ24 
Go to UniProtKB:  Q2RQ24
Entity Groups
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ2RQ24
Sequence Annotations
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Reference Sequence

Small Molecules

Ligands 11 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
CD4

Query on CD4



Download:Ideal Coordinates CCD File
FB [auth H],
YB [auth M]
(2R,5R,11R,14R)-5,8,11-trihydroxy-5,11-dioxido-17-oxo-2,14-bis(tetradecanoyloxy)-4,6,10,12,16-pentaoxa-5,11-diphosphatriacont-1-yl tetradecanoate
C65 H126 O17 P2
SDCJNZZAOLRVCP-GTOSQJSUSA-N
07D
(Subject of Investigation/LOI)

Query on 07D



Download:Ideal Coordinates CCD File
AB [auth F]
BB [auth G]
CB [auth H]
CC [auth N]
EC [auth O]
AB [auth F],
BB [auth G],
CB [auth H],
CC [auth N],
EC [auth O],
GC [auth Q],
HB [auth I],
HC [auth R],
IB [auth J],
JA [auth 1],
KC [auth S],
LA [auth 2],
LB [auth K],
LC [auth T],
MC [auth U],
NA [auth 3],
NC [auth V],
OA [auth 4],
OC [auth W],
PB [auth L],
PC [auth X],
QA [auth 5],
QB [auth L],
RA [auth 6],
RC [auth Y],
SC [auth Z],
TA [auth 7],
UA [auth 8],
UC [auth d],
VB [auth M],
WA [auth 9],
WB [auth M],
WC [auth m],
XA [auth A],
YA [auth D],
YC [auth n],
ZA [auth E]
Trans-Geranyl BACTERIOCHLOROPHYLL A
C55 H64 Mg N4 O6
ZBSZXIUSELHDGQ-POZHEDQMSA-M
BPH
(Subject of Investigation/LOI)

Query on BPH



Download:Ideal Coordinates CCD File
MB [auth L],
TB [auth M]
BACTERIOPHEOPHYTIN A
C55 H76 N4 O6
KWOZSBGNAHVCKG-SZQBJALDSA-N
U10
(Subject of Investigation/LOI)

Query on U10



Download:Ideal Coordinates CCD File
OB [auth L],
RB [auth L],
UB [auth M]
UBIQUINONE-10
C59 H90 O4
ACTIUHUUMQJHFO-UPTCCGCDSA-N
RQ0
(Subject of Investigation/LOI)

Query on RQ0



Download:Ideal Coordinates CCD File
NB [auth L]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
C58 H85 N O3
WXESXKLCRFKYIR-NBYUNPNPSA-N
PGW

Query on PGW



Download:Ideal Coordinates CCD File
DB [auth H],
EB [auth H]
(1R)-2-{[(S)-{[(2S)-2,3-dihydroxypropyl]oxy}(hydroxy)phosphoryl]oxy}-1-[(hexadecanoyloxy)methyl]ethyl (9Z)-octadec-9-enoate
C40 H77 O10 P
PAZGBAOHGQRCBP-HGWHEPCSSA-N
CRT

Query on CRT



Download:Ideal Coordinates CCD File
BC [auth N]
DC [auth O]
FC [auth Q]
GB [auth I]
JB [auth J]
BC [auth N],
DC [auth O],
FC [auth Q],
GB [auth I],
JB [auth J],
JC [auth S],
KA [auth 1],
KB [auth K],
MA [auth 3],
PA [auth 5],
QC [auth Y],
SA [auth 7],
TC [auth d],
VA [auth 9],
VC [auth m],
XB [auth M],
XC [auth n]
SPIRILLOXANTHIN
C42 H60 O2
VAZQBTJCYODOSV-RISZBRKMSA-N
LMT

Query on LMT



Download:Ideal Coordinates CCD File
IC [auth R]DODECYL-BETA-D-MALTOSIDE
C24 H46 O11
NLEBIOOXCVAHBD-QKMCSOCLSA-N
PO4

Query on PO4



Download:Ideal Coordinates CCD File
AC [auth M]PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
FE

Query on FE



Download:Ideal Coordinates CCD File
SB [auth M]FE (III) ION
Fe
VTLYFUHAOXGGBS-UHFFFAOYSA-N
CL

Query on CL



Download:Ideal Coordinates CCD File
ZB [auth M]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
FME
Query on FME
B [auth 2]
BA [auth V]
D [auth 4]
DA [auth X]
F [auth 6]
B [auth 2],
BA [auth V],
D [auth 4],
DA [auth X],
F [auth 6],
FA [auth Z],
H [auth 8],
J [auth A],
K [auth D],
L [auth E],
M [auth F],
N [auth G],
Q [auth J],
U [auth N],
Z [auth T]
L-PEPTIDE LINKINGC6 H11 N O3 SMET

Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.50 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONRELION3.1
MODEL REFINEMENTPHENIX

Structure Validation

View Full Validation Report



Entry History 

& Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Biotechnology and Biological Sciences Research Council (BBSRC)United KingdomBB/M000265/1
European Research Council (ERC)European UnionSynergy Award 854126
Wellcome TrustUnited Kingdom209407/Z/17/Z

Revision History  (Full details and data files)

  • Version 1.0: 2021-09-22
    Type: Initial release
  • Version 1.1: 2024-11-13
    Changes: Data collection, Refinement description, Structure summary