ISDA

Entry Detail

PDB ID:

6ZI4

Keywords:

ELECTRON TRANSPORT

Title:

Ultrafast Structural Response to Charge Redistribution Within a Photosynthetic Reaction Centre - 5 ps (a) structure

Biological Source:

Source Organism:

Blastochloris viridis

PDB Version:

Deposition Date:

2020-06-24

Release Date:

2020-12-09

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.80 Å

R-Value Free:

0.20

R-Value Work:

0.17

R-Value Observed:

0.17

Space Group:

P 43 21 2

Download Validation Report

Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:Photosynthetic reaction center cytochrome c subunit
Chain IDs:A (auth: C)
Chain Length:336
Number of Molecules:1
Biological Source:Blastochloris viridis

UniProt ID:P07173 Pfam ID:PF02276

Protein Blast

Polymer Type:polypeptide(L)
Description:Reaction center protein H chain
Chain IDs:B (auth: H)
Chain Length:258
Number of Molecules:1
Biological Source:Blastochloris viridis

UniProt ID:P06008 Pfam ID:PF03967, PF05239

Protein Blast

Polymer Type:polypeptide(L)
Description:Reaction center protein L chain
Chain IDs:C (auth: L)
Chain Length:273
Number of Molecules:1
Biological Source:Blastochloris viridis

UniProt ID:P06009 Pfam ID:PF00124

Protein Blast

Polymer Type:polypeptide(L)
Description:Reaction center protein M chain
Chain IDs:D (auth: M)
Chain Length:323
Number of Molecules:1
Biological Source:Blastochloris viridis

UniProt ID:P06010 Pfam ID:PF00124

Modified Residue

Compound ID	Chain ID	Parent Comp ID	Details	2D Image
FME	B	MET	modified residue

Ligand Molecules

BCB

BPB

DGA

HEC

HTO

LDA

MQ7

NS5

SO4

Primary Citation

Ultrafast structural changes within a photosynthetic reaction centre.

Dods, R, Bath, P, Morozov, D, Gagner, V.A, Arnlund, D, Luk, H.L, Kubel, J, Maj, M, Vallejos, A, Wickstrand, C, Bosman, R, Beyerlein, K.R, Nelson, G, Liang, M, Milathianaki, D, Robinson, J, Harimoorthy, R, Berntsen, P, Malmerberg, E, Johansson, L, Andersson, R, Carbajo, S, Claesson, E, Conrad, C.E, Dahl, P, Hammarin, G, Hunter, M.S, Li, C, Lisova, S, Royant, A, Safari, C, Sharma, A, Williams, G.J, Yefanov, O, Westenhoff, S, Davidsson, J, DePonte, D.P, Boutet, S, Barty, A, Katona, G, Groenhof, G, Branden, G, Neutze, R.Show

Nature 589 310 314 (2021)

PMID: 33268896 DOI: 10.1038/s41586-020-3000-7

Abstact

Photosynthetic reaction centres harvest the energy content of sunlight by transporting electrons across an energy-transducing biological membrane. Here we use time-resolved serial femtosecond crystallography1 using an X-ray free-electron laser2 to observe light-induced structural changes in the photosynthetic reaction centre of Blastochloris viridis on a timescale of picoseconds. Structural perturbations first occur at the special pair of chlorophyll molecules of the photosynthetic reaction centre that are photo-oxidized by light. Electron transfer to the menaquinone acceptor on the opposite side of the membrane induces a movement of this cofactor together with lower amplitude protein rearrangements. These observations reveal how proteins use conformational dynamics to stabilize the charge-separation steps of electron-transfer reactions.

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Primary Citation of related structures