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2.4-Å structure of the double-ring Gemmatimonas phototrophica photosystem.
<div class='caption-title'>Cryo-EM structure of the RC-dLH complex from G. phototrophica.</div>
<div class='caption-title'>Protein-protein interactions between the LH1 and RC complexes.</div>
Qian P, Gardiner AT, Šímová I, Naydenova K, Croll TI, Jackson PJ, Kloz M, Čubáková P, Kuzma M, Zeng Y, Castro-Hartmann P, van Knippenberg B, Goldie KN, Kaftan D, Hrouzek P, Hájek J, Agirre J, Siebert CA, Bína D, Sader K, Stahlberg H, Sobotka R, Russo CJ, Polívka T, Hunter CN, Koblížek M
OpenAccess logo Sci Adv 8 eabk3139 (2022)
Related entries: 7o0v, 7o0w, 7o0x

Cited: 9 times
EuropePMC logo PMID: 35171663

Abstract

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 Gemmatimonas phototrophica 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 G. phototrophica has independently evolved its own compact, robust, and highly effective architecture for harvesting and trapping solar energy.

Articles - 7o0u mentioned but not cited (2)

  1. research-article De novo design of energy transfer proteins housing excitonically coupled chlorophyll special pairs. Ennist N, Wang S, Kennedy M, Curti M, Sutherland G, Vasilev C, Redler R, Maffeis V, Shareef S, Sica A, Hua A, Deshmukh A, Moyer A, Hicks D, Swartz A, Cacho R, Novy N, Bera A, Kang A, Sankaran B, Johnson M, Reppert M, Ekiert D, Bhabha G, Stewart L, Caram J, Stoddard B, Romero E, Hunter CN, Baker D. Res Sq rs.3.rs-2736786 (2023)
  2. Carotenoid assembly regulates quinone diffusion and the Roseiflexus castenholzii reaction center-light harvesting complex architecture. Xin J, Shi Y, Zhang X, Yuan X, Xin Y, He H, Shen J, Blankenship RE, Xu X. Elife 12 e88951 (2023)


Articles citing this publication (7)

  1. The structure and assembly of reaction centre-light-harvesting 1 complexes in photosynthetic bacteria. Swainsbury DJK, Qian P, Hitchcock A, Hunter CN. Biosci Rep 43 BSR20220089 (2023)
  2. Multi-environment ecogenomics analysis of the cosmopolitan phylum Gemmatimonadota. Mujakić I, Cabello-Yeves PJ, Villena-Alemany C, Piwosz K, Rodriguez-Valera F, Picazo A, Camacho A, Koblížek M. Microbiol Spectr e0111223 (2023)
  3. The Influence of Calcium on the Growth, Morphology and Gene Regulation in Gemmatimonas phototrophica. Shivaramu S, Tomasch J, Kopejtka K, Nupur, Saini MK, Bokhari SNH, Küpper H, Koblížek M. Microorganisms 11 27 (2022)
  4. New insights on the photocomplex of Roseiflexus castenholzii revealed from comparisons of native and carotenoid-depleted complexes. Qi CH, Wang GL, Wang FF, Xin Y, Zou MJ, Madigan MT, Wang-Otomo ZY, Ma F, Yu LJ. J Biol Chem 299 105057 (2023)
  5. A photoheterotrophic bacterium from Iceland has adapted its photosynthetic machinery to the long days of polar summer. Tomasch J, Kopejtka K, Bílý T, Gardiner AT, Gardian Z, Shivaramu S, Koblížek M, Kaftan D. mSystems 9 e0131123 (2024)
  6. De novo design of proteins housing excitonically coupled chlorophyll special pairs. Ennist NM, Wang S, Kennedy MA, Curti M, Sutherland GA, Vasilev C, Redler RL, Maffeis V, Shareef S, Sica AV, Hua AS, Deshmukh AP, Moyer AP, Hicks DR, Swartz AZ, Cacho RA, Novy N, Bera AK, Kang A, Sankaran B, Johnson MP, Phadkule A, Reppert M, Ekiert D, Bhabha G, Stewart L, Caram JR, Stoddard BL, Romero E, Hunter CN, Baker D. Nat Chem Biol 20 906-915 (2024)
  7. Minimal transcriptional regulation of horizontally transferred photosynthesis genes in phototrophic bacterium Gemmatimonas phototrophica. Kopejtka K, Tomasch J, Shivaramu S, Saini MK, Kaftan D, Koblížek M. mSystems 9 e0070624 (2024)


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