1k6l Summary

pdbe.org/1k6l
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Photosynethetic Reaction Center from Rhodobacter sphaeroides

The structure was published by Pokkuluri, P.R., Laible, P.D., Deng, Y.L., Wong, T.N., Hanson, D.K., and Schiffer, M., in 2002 in a paper entitled "The structure of a mutant photosynthetic reaction center shows unexpected changes in main chain orientations and quinone position." (abstract).

This crystal structure was determined using X-ray diffraction at a resolution of 3.1 Å and deposited in 2001.

The experimental data on which the structure is based was also deposited.

This PDB entry contains a complex of 3 biomacromolecules, namely PHOTOSYNTHETIC REACTION CENTER L SUBUNIT, PHOTOSYNTHETIC REACTION CENTER M SUBUNIT, and PHOTOSYNTHETIC REACTION CENTER H SUBUNIT.

It also contains one or more heterogenic compounds (e.g., ligands, co-factors, ions, modified amino acids, etc.); see here for a complete list.

The molecule most likely forms heterotrimers.

The following tables show cross-reference information to other databases (to obtain a list of all PDB entries sharing the same property or classification, click on the magnifying glass icon):


Chain Name UniProt Name of source organism % of UniProt sequence present in the sample Residues in the sample molecules % of residues observed
L PHOTOSYNTHETIC REACTION CENTER L SUBUNIT P0C0Y8 (2-282) (RCEL_RHOSH)search Rhodobacter sphaeroidessearch 94% 281 100%
M PHOTOSYNTHETIC REACTION CENTER M SUBUNIT P0C0Y9 (2-308) (RCEM_RHOSH)search Rhodobacter sphaeroidessearch 96% 314 96%
H PHOTOSYNTHETIC REACTION CENTER H SUBUNIT P0C0Y7 (1-260) (RCEH_RHOSH)search Rhodobacter sphaeroidessearch 91% 260 92%


This entry contains 3 unique UniProt proteins:

UniProt accession Name Organism PDB
P0C0Y8 (2 - 282) PHOTOSYNTHETIC REACTION CENTER L SUBUNIT Rhodobacter sphaeroides
P0C0Y9 (2 - 308) PHOTOSYNTHETIC REACTION CENTER M SUBUNIT Rhodobacter sphaeroides
P0C0Y7 (1 - 260) PHOTOSYNTHETIC REACTION CENTER H SUBUNIT Rhodobacter sphaeroides

Chain Structural classification (SCOP) Structural classification (CATH) Sequence family (Pfam)
L (P0C0Y8) Bacterial photosystem II reaction centre, L and M subunitssearch Membrane spanning alpha-helix pairssearch PF00124: Photosynthetic reaction centre proteinsearch
M (P0C0Y9) Bacterial photosystem II reaction centre, L and M subunitssearch Membrane spanning alpha-helix pairssearch PF00124: Photosynthetic reaction centre proteinsearch
H (P0C0Y7) Photosynthetic reaction centre, H-chain, cytoplasmic domainsearch, Photosystem II reaction centre subunit H, transmembrane regionsearch Photosynthetic Reaction Center, subunit H, domain 1search, Photosynthetic Reaction Center, subunit H, domain 2search PF03967: Photosynthetic reaction centre, H-chain N-terminal regionsearch, PF05239: PRC-barrel domainsearch

Chain ID Biological process (GO) Molecular function (GO) Cellular component (GO)
L (P0C0Y8) photosynthesissearch photosynthetic electron transport in photosystem IIsearch photosynthesis, light reactionsearch protein-chromophore linkagesearch oxidation-reduction processsearch bacteriochlorophyll bindingsearch metal ion bindingsearch electron transporter, transferring electrons within the cyclic electron transport pathway of photosynthesis activitysearch chlorophyll bindingsearch membranesearch plasma membrane-derived chromatophore membranesearch plasma membrane light-harvesting complexsearch integral component of membranesearch
M (P0C0Y9) oxidation-reduction processsearch protein-chromophore linkagesearch photosynthetic electron transport in photosystem IIsearch photosynthesis, light reactionsearch photosynthesissearch electron transporter, transferring electrons within the cyclic electron transport pathway of photosynthesis activitysearch chlorophyll bindingsearch metal ion bindingsearch bacteriochlorophyll bindingsearch plasma membrane-derived chromatophore membranesearch plasma membrane light-harvesting complexsearch integral component of membranesearch membranesearch
H (P0C0Y7) photosynthesis, light reactionsearch oxidation-reduction processsearch protein-chromophore linkagesearch photosynthesissearch electron transporter, transferring electrons within the cyclic electron transport pathway of photosynthesis activitysearch bacteriochlorophyll bindingsearch chlorophyll bindingsearch plasma membrane light-harvesting complexsearch integral component of membranesearch membranesearch plasma membrane-derived chromatophore membranesearch

Chain InterPro annotation
L Photosynthetic reaction centre, L/Msearch Photosynthetic reaction centre, L subunitsearch
M Photosynthetic reaction centre, L/Msearch Photosynthetic reaction centre, M subunitsearch
H Photosynthetic reaction centre, H subunitsearch PRC-barrel-likesearch Bacterial photosynthetic reaction centre, H-chain, C-terminalsearch Photosynthetic reaction centre, H subunit, N-terminalsearch PRC-barrel domainsearch