7C9R | pdb_00007c9r

STRUCTURE OF PHOTOSYNTHETIC LH1-RC SUPER-COMPLEX OF THIORHODOVIBRIO STRAIN 970


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.82 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Starting Model: experimental
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This is version 1.3 of the entry. See complete history

Literature

Cryo-EM structure of a Ca 2+ -bound photosynthetic LH1-RC complex containing multiple alpha beta-polypeptides.

Tani, K.Kanno, R.Makino, Y.Hall, M.Takenouchi, M.Imanishi, M.Yu, L.J.Overmann, J.Madigan, M.T.Kimura, Y.Mizoguchi, A.Humbel, B.M.Wang-Otomo, Z.Y.

(2020) Nat Commun 11: 4955-4955

  • DOI: https://doi.org/10.1038/s41467-020-18748-3
  • Primary Citation Related Structures: 
    7C9R

  • PubMed Abstract: 

    The light-harvesting-reaction center complex (LH1-RC) from the purple phototrophic bacterium Thiorhodovibrio strain 970 exhibits an LH1 absorption maximum at 960 nm, the most red-shifted absorption for any bacteriochlorophyll (BChl) a-containing species. Here we present a cryo-EM structure of the strain 970 LH1-RC complex at 2.82 Å resolution. The LH1 forms a closed ring structure composed of sixteen pairs of the αβ-polypeptides. Sixteen Ca ions are present in the LH1 C-terminal domain and are coordinated by residues from the αβ-polypeptides that are hydrogen-bonded to BChl a. The Ca 2+ -facilitated hydrogen-bonding network forms the structural basis of the unusual LH1 redshift. The structure also revealed the arrangement of multiple forms of α- and β-polypeptides in an individual LH1 ring. Such organization indicates a mechanism of interplay between the expression and assembly of the LH1 complex that is regulated through interactions with the RC subunits inside.


  • Organizational Affiliation
    • Graduate School of Medicine, Mie University, Tsu, 514-8507, Japan. ktani@doc.medic.mie-u.ac.jp.

Macromolecule Content 

  • Total Structure Weight: 442.27 kDa 
  • Atom Count: 29,228 
  • Modeled Residue Count: 3,009 
  • Deposited Residue Count: 3,208 
  • Unique protein chains: 10

Macromolecules

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Entity ID: 1
MoleculeChains  Sequence LengthOrganismDetailsImage
Photosynthetic reaction center cytochrome c subunitA [auth C]396Thiorhodovibrio frisiusMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for H8Z3S2 (Thiorhodovibrio frisius)
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Entity Groups
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UniProt GroupH8Z3S2
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Reference Sequence
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Entity ID: 2
MoleculeChains  Sequence LengthOrganismDetailsImage
L subunit of the reaction centerB [auth L]273Thiorhodovibrio frisiusMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for G1BIY6 (Thiorhodovibrio frisius)
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Entity Groups
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UniProt GroupG1BIY6
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Reference Sequence
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Entity ID: 3
MoleculeChains  Sequence LengthOrganismDetailsImage
Reaction center protein M chainC [auth M]324Thiorhodovibrio frisiusMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for G1BIY7 (Thiorhodovibrio frisius)
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Entity Groups
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UniProt GroupG1BIY7
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Reference Sequence
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Entity ID: 4
MoleculeChains  Sequence LengthOrganismDetailsImage
Photosynthetic reaction center, subunit H, bacterialD [auth H]258Thiorhodovibrio frisiusMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for H8Z0X5 (Thiorhodovibrio frisius)
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UniProt GroupH8Z0X5
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Reference Sequence
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Entity ID: 5
MoleculeChains  Sequence LengthOrganismDetailsImage
Alpha subunit 1 of light-harvesting 1 complex73Thiorhodovibrio frisiusMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for G1BIY5 (Thiorhodovibrio frisius)
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UniProt GroupG1BIY5
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Reference Sequence
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Entity ID: 6
MoleculeChains  Sequence LengthOrganismDetailsImage
Antenna complex alpha/beta subunitDA [auth 4],
F [auth B],
P
46Thiorhodovibrio frisiusMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for G1BIY9 (Thiorhodovibrio frisius)
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UniProt GroupG1BIY9
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Reference Sequence
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Entity ID: 7
MoleculeChains  Sequence LengthOrganismDetailsImage
Antenna complex alpha/beta subunit46Thiorhodovibrio frisiusMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for G1BIY4 (Thiorhodovibrio frisius)
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UniProt GroupG1BIY4
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Reference Sequence
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Entity ID: 8
MoleculeChains  Sequence LengthOrganismDetailsImage
Antenna complex alpha/beta subunit81Thiorhodovibrio frisiusMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for H8Z3S4 (Thiorhodovibrio frisius)
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UniProt GroupH8Z3S4
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Reference Sequence
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Entity ID: 9
MoleculeChains  Sequence LengthOrganismDetailsImage
LHC domain-containing protein77Thiorhodovibrio frisiusMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for H8Z3R9 (Thiorhodovibrio frisius)
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UniProt GroupH8Z3R9
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Reference Sequence
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Entity ID: 10
MoleculeChains  Sequence LengthOrganismDetailsImage
Alpha subunit 2 of light-harvesting 1 complexIA [auth 9]86Thiorhodovibrio frisiusMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for G1BIZ0 (Thiorhodovibrio frisius)
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UniProt GroupG1BIZ0
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Reference Sequence

Small Molecules

Ligands 14 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
CDL

Query on CDL



Download:Ideal Coordinates CCD File
DD [auth S],
GB [auth H],
UD [auth Y]
CARDIOLIPIN
C81 H156 O17 P2
XVTUQDWPJJBEHJ-KZCWQMDCSA-L
BCL

Query on BCL



Download:Ideal Coordinates CCD File
AB [auth M]
AD [auth Q]
AE [auth 1]
BB [auth M]
BF [auth 9]
AB [auth M],
AD [auth Q],
AE [auth 1],
BB [auth M],
BF [auth 9],
CC [auth I],
CF [auth 9],
DE [auth 2],
EC [auth J],
FD [auth S],
GD [auth T],
HE [auth 3],
IB [auth A],
IE [auth 3],
JD [auth U],
KC [auth K],
KD [auth U],
MB [auth B],
NC [auth K],
NE [auth 5],
OE [auth 5],
PD [auth W],
QB [auth D],
QD [auth X],
RB [auth D],
SA [auth L],
SC [auth O],
TC [auth O],
TD [auth Y],
UE [auth 7],
VA [auth L],
VD [auth Y],
VE [auth 7],
WB [auth F],
YB [auth F],
ZC [auth Q]
BACTERIOCHLOROPHYLL A
C55 H74 Mg N4 O6
DSJXIQQMORJERS-AGGZHOMASA-M
BPH

Query on BPH



Download:Ideal Coordinates CCD File
CB [auth M],
TA [auth L]
BACTERIOPHEOPHYTIN A
C55 H76 N4 O6
KWOZSBGNAHVCKG-SZQBJALDSA-N
PGV

Query on PGV



Download:Ideal Coordinates CCD File
BE [auth 1]
DC [auth I]
EB [auth M]
FB [auth H]
FE [auth 3]
BE [auth 1],
DC [auth I],
EB [auth M],
FB [auth H],
FE [auth 3],
GC [auth K],
HB [auth A],
HC [auth K],
LC [auth K],
LE [auth 5],
OB [auth D],
QC [auth O],
RA [auth C],
UB [auth F],
WA [auth L],
WD [auth Y],
XB [auth F],
XC [auth Q],
ZE [auth 9]
(1R)-2-{[{[(2S)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL (11E)-OCTADEC-11-ENOATE
C40 H77 O10 P
ADYWCMPUNIVOEA-GPJPVTGXSA-N
UQ8

Query on UQ8



Download:Ideal Coordinates CCD File
UA [auth L],
XA [auth L]
Ubiquinone-8
C49 H74 O4
ICFIZJQGJAJRSU-SGHXUWJISA-N
MQ8

Query on MQ8



Download:Ideal Coordinates CCD File
DB [auth M]MENAQUINONE 8
C51 H72 O2
LXKDFTDVRVLXFY-ACMRXAIVSA-N
DGA

Query on DGA



Download:Ideal Coordinates CCD File
QA [auth C]DIACYL GLYCEROL
C39 H76 O5
UHUSDOQQWJGJQS-QNGWXLTQSA-N
HEM

Query on HEM



Download:Ideal Coordinates CCD File
KA [auth C],
LA [auth C],
MA [auth C],
NA [auth C]
PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
H4X

Query on H4X



Download:Ideal Coordinates CCD File
BD [auth Q]
CE [auth 2]
IC [auth K]
JE [auth 4]
KB [auth B]
BD [auth Q],
CE [auth 2],
IC [auth K],
JE [auth 4],
KB [auth B],
LD [auth U],
MC [auth K],
MD [auth V],
PC [auth O],
PE [auth 5],
RE [auth 6],
SB [auth E],
UC [auth O],
VC [auth P],
WE [auth 7],
XD [auth Z],
ZB [auth G]
(6~{E},8~{E},10~{E},12~{E},14~{E},16~{E},18~{E},20~{E},22~{E},24~{E},26~{E})-2,31-dimethoxy-2,6,10,14,19,23,27,31-octamethyl-dotriaconta-6,8,10,12,14,16,18,20,22,24,26-undecaene
C42 H64 O2
LCTIOHZQWXQPIB-VYCPWLLESA-N
LMT

Query on LMT



Download:Ideal Coordinates CCD File
AC [auth G]
CD [auth R]
DF [auth 0]
EE [auth 2]
FC [auth J]
AC [auth G],
CD [auth R],
DF [auth 0],
EE [auth 2],
FC [auth J],
HD [auth T],
KE [auth 4],
LB [auth B],
NB [auth B],
ND [auth V],
OC [auth N],
RD [auth X],
SE [auth 6],
TB [auth E],
WC [auth P],
XE [auth 8],
YD [auth Z],
YE [auth 8]
DODECYL-BETA-D-MALTOSIDE
C24 H46 O11
NLEBIOOXCVAHBD-QKMCSOCLSA-N
8K6

Query on 8K6



Download:Ideal Coordinates CCD File
QE [auth 5],
YA [auth L]
Octadecane
C18 H38
RZJRJXONCZWCBN-UHFFFAOYSA-N
FE

Query on FE



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

Query on CA



Download:Ideal Coordinates CCD File
AF [auth 9]
BC [auth I]
ED [auth S]
GE [auth 3]
ID [auth U]
AF [auth 9],
BC [auth I],
ED [auth S],
GE [auth 3],
ID [auth U],
JB [auth A],
JC [auth K],
ME [auth 5],
OD [auth W],
PA [auth C],
PB [auth D],
RC [auth O],
SD [auth Y],
TE [auth 7],
VB [auth F],
YC [auth Q],
ZD [auth 1]
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
MG

Query on MG



Download:Ideal Coordinates CCD File
OA [auth C]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.82 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
MODEL REFINEMENTPHENIX
MODEL REFINEMENTREFMAC
RECONSTRUCTIONRELION

Structure Validation

View Full Validation Report



Entry History 

& Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Japan Agency for Medical Research and Development (AMED)JapanJP20am0101118
Japan Agency for Medical Research and Development (AMED)JapanJP20am0101116
Japan Society for the Promotion of Science (JSPS)JapanJP16H04174
Japan Society for the Promotion of Science (JSPS)JapanJP18H05153
Japan Society for the Promotion of Science (JSPS)Japan20H05086
Japan Society for the Promotion of Science (JSPS)Japan20H02856

Revision History  (Full details and data files)

  • Version 1.0: 2020-10-07
    Type: Initial release
  • Version 1.1: 2020-10-14
    Changes: Database references
  • Version 1.2: 2025-04-09
    Changes: Data collection, Database references, Refinement description, Structure summary
  • Version 1.3: 2025-09-17
    Changes: Advisory, Data collection, Derived calculations