6HQB

Monomeric cyanobacterial photosystem I

Summary for 6HQB

• Entry DOI: 10.2210/pdb6hqb/pdb
• Descriptor: Photosystem I P700 chlorophyll a apoprotein A1, Photosystem I reaction center subunit XI, Photosystem I reaction center subunit XII, ... (25 entities in total)
• Functional Keywords: crystal structure; cyanobacteria; membrane complexes; photosynthesis; photosystem i; synechocystis, photosynthesis
• Biological source: Synechocystis sp. (strain PCC 6803 / Kazusa); More
• Total number of polymer chains: 11
• Total formula weight: 349063.06

Authors

Netzer-El, S.Y.,Nelson, N.,Caspy, I. (deposition date: 2018-09-24, release date: 2019-01-16, Last modification date: 2025-04-09)

Primary citation

Netzer-El, S.Y.,Caspy, I.,Nelson, N.
Crystal Structure of Photosystem I Monomer From Synechocystis PCC 6803.
Front Plant Sci, 9:1865-1865, 2018

PubMed Abstract: A single histidine addition to the C-terminus of PsaL of sp. PCC 6803 was previously reported by our lab to shift the trimer-to-monomer ratio of PSI in favor of the monomeric form. P700 re-reduction and NADP photo-reduction measurements of the PsaL strain show no effect on PSI activity in comparison to the WT trimeric PSI. Crystal structure of the PsaL monomeric PSI reveals several alterations that occurred in the trimerisation site of PSI, primarily a deformation of the C-terminus of PsaL and loss of chlorophyll a and β-carotene molecules.

PubMed: 30662446
DOI: 10.3389/fpls.2018.01865

Experimental method

X-RAY DIFFRACTION (4 Å)