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Structure paper

Title2.4-Å structure of the double-ring photosystem.
Journal, issue, pagesSci Adv, Vol. 8, Issue 7, Page eabk3139, Year 2022
Publish dateFeb 18, 2022
AuthorsPu Qian / Alastair T Gardiner / Ivana Šímová / Katerina Naydenova / Tristan I Croll / Philip J Jackson / Nupur / Miroslav Kloz / Petra Čubáková / Marek Kuzma / Yonghui Zeng / Pablo Castro-Hartmann / Bart van Knippenberg / Kenneth N Goldie / David Kaftan / Pavel Hrouzek / Jan Hájek / Jon Agirre / C Alistair Siebert / David Bína / Kasim Sader / Henning Stahlberg / Roman Sobotka / Christopher J Russo / Tomáš Polívka / C Neil Hunter / Michal Koblížek /
PubMed AbstractPhototrophic Gemmatimonadetes evolved the ability to use solar energy following horizontal transfer of photosynthesis-related genes from an ancient phototrophic proteobacterium. The electron cryo- ...Phototrophic Gemmatimonadetes evolved the ability to use solar energy following horizontal transfer of photosynthesis-related genes from an ancient phototrophic proteobacterium. The electron cryo-microscopy structure of the photosystem at 2.4 Å reveals a unique, double-ring complex. Two unique membrane-extrinsic polypeptides, RC-S and RC-U, hold the central type 2 reaction center (RC) within an inner 16-subunit light-harvesting 1 (LH1) ring, which is encircled by an outer 24-subunit antenna ring (LHh) that adds light-gathering capacity. Femtosecond kinetics reveal the flow of energy within the RC-dLH complex, from the outer LHh ring to LH1 and then to the RC. This structural and functional study shows that has independently evolved its own compact, robust, and highly effective architecture for harvesting and trapping solar energy.
External linksSci Adv / PubMed:35171663 / PubMed Central
MethodsEM (single particle)
Resolution2.35 - 2.5 Å
Structure data

12679

7o0u

EMDB-12679, PDB-7o0u:
Cryo-EM structure (model_1a) of the RC-dLH complex from Gemmatimonas phototrophica at 2.4 A
Method: EM (single particle) / Resolution: 2.35 Å

12680

7o0v

EMDB-12680, PDB-7o0v:
Cryo-EM structure (model_2a) of the RC-dLH complex from Gemmatimonas phototrophica at 2.5 A
Method: EM (single particle) / Resolution: 2.5 Å

12681

7o0w

EMDB-12681, PDB-7o0w:
Cryo-EM structure of the RC-dLH complex (model_1b) from Gemmatimonas phototrophica at 2.47 A
Method: EM (single particle) / Resolution: 2.47 Å

12682

7o0x

EMDB-12682, PDB-7o0x:
Cryo-EM structure (model_2b) of the RC-dLH complex from Gemmatimonas phototrophica at 2.44 A
Method: EM (single particle) / Resolution: 2.44 Å

Chemicals

ChemComp-BCL:
BACTERIOCHLOROPHYLL A / Bacteriochlorophyll

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

ChemComp-V7N:
(2~{E},4~{E},6~{E},10~{E},12~{E},14~{E},16~{E},18~{E},20~{E},22~{Z},24~{E},26~{E},28~{E})-23-methanoyl-31-methoxy-2,6,10,14,19,27,31-heptamethyl-dotriaconta-2,4,6,10,12,14,16,18,20,22,24,26,28-tridecaenoic acid

ChemComp-0V9:
(19R,22S)-25-amino-22-hydroxy-22-oxido-16-oxo-17,21,23-trioxa-22lambda~5~-phosphapentacosan-19-yl (9Z)-hexadec-9-enoate

ChemComp-HEC:
HEME C / Heme C

ChemComp-NDG:
2-acetamido-2-deoxy-alpha-D-glucopyranose / N-Acetylglucosamine

ChemComp-V75:
(2~{S},3~{S},4~{S},5~{S})-4,5-diacetyloxy-3-oxidanyl-oxane-2-carboxylic acid

ChemComp-CD4:
(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

ChemComp-PGW:
(1R)-2-{[(S)-{[(2S)-2,3-dihydroxypropyl]oxy}(hydroxy)phosphoryl]oxy}-1-[(hexadecanoyloxy)methyl]ethyl / phospholipid*YM / Phosphatidylglycerol

ChemComp-MQ8:
MENAQUINONE 8 / Vitamin K2

ChemComp-BPH:
BACTERIOPHEOPHYTIN A / Pheophytin

ChemComp-FE:
Unknown entry / Iron

ChemComp-CRT:
SPIRILLOXANTHIN

ChemComp-V7B:
[(2~{S})-3-[(2~{R},3~{R},4~{R},5~{S},6~{R})-6-(hydroxymethyl)-5-[(2~{R},3~{R},4~{S},5~{S},6~{R})-6-(hydroxymethyl)-3,4,5-tris(oxidanyl)oxan-2-yl]oxy-3,4-bis(oxidanyl)oxan-2-yl]oxy-2-(12-methyltridecanoyloxy)propyl] 12-methyltridecanoate

ChemComp-UYH:
[(2~{S})-3-[(2~{R},3~{R},4~{S},5~{S},6~{R})-6-(hydroxymethyl)-3,4,5-tris(oxidanyl)oxan-2-yl]oxy-2-octadecanoyloxy-propyl] octadecanoate

ChemComp-HOH:
WATER / Water

Source
  • gemmatimonas phototrophica (bacteria)
KeywordsMEMBRANE PROTEIN / Photosynthesis / reaction centre light harvesting complex / RC-dLH / RC-LH1 / carotenoid / quinone / bacteriochlorophyll a / Gemmatimonas phototrophica

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