ISDA: 6HQB

Deposition Date 2018-09-24

Release Date 2019-01-16

Last Version Date 2025-10-01

Entry Detail

PDB ID:

6HQB

Keywords:

PHOTOSYNTHESIS

Title:

Monomeric cyanobacterial photosystem I

Biological Source:

Source Organism:

Synechocystis sp. (strain PCC 6803 / Kazusa) (Taxon ID: 1111708)

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

4.00 Å

R-Value Free:

0.29

R-Value Work:

0.25

R-Value Observed:

0.25

Space Group:

P 21 21 21

Download Validation Report

Macromolecular Entities

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Photosystem I P700 chlorophyll a apoprotein A1
Gene (Uniprot):psaA
Chain IDs:A
Chain Length:751
Number of Molecules:1
Biological Source:Synechocystis sp. (strain PCC 6803 / Kazusa)

UniProt ID:P29254 Pfam ID:PF00223 EC:1.97.1.12

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Photosystem I P700 chlorophyll a apoprotein A2
Gene (Uniprot):psaB
Chain IDs:B
Chain Length:731
Number of Molecules:1
Biological Source:Synechocystis sp. (strain PCC 6803 / Kazusa)

UniProt ID:P29255 Pfam ID:PF00223 EC:1.97.1.12

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Photosystem I iron-sulfur center
Gene (Uniprot):psaC
Chain IDs:C
Chain Length:80
Number of Molecules:1
Biological Source:Synechocystis sp. (strain PCC 6803 / Kazusa)

UniProt ID:P32422 Pfam ID:PF12838 EC:1.97.1.12

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Photosystem I reaction center subunit II
Gene (Uniprot):psaD
Chain IDs:D
Chain Length:141
Number of Molecules:1
Biological Source:Synechocystis sp. (strain PCC 6803 / Kazusa)

UniProt ID:P19569 Pfam ID:PF02531

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Photosystem I reaction center subunit IV
Gene (Uniprot):psaE
Chain IDs:E
Chain Length:69
Number of Molecules:1
Biological Source:Synechocystis sp. (strain PCC 6803 / Kazusa)

UniProt ID:P12975 Pfam ID:PF02427

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Photosystem I reaction center subunit III
Gene (Uniprot):psaF
Chain IDs:F
Chain Length:143
Number of Molecules:1
Biological Source:Synechocystis sp. (strain PCC 6803 / Kazusa)

UniProt ID:P29256 Pfam ID:PF02507

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Photosystem I reaction center subunit VIII
Gene (Uniprot):psaI
Chain IDs:G (auth: I)
Chain Length:40
Number of Molecules:1
Biological Source:Synechocystis sp. (strain PCC 6803 / Kazusa)

UniProt ID:Q55330 Pfam ID:PF00796

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Photosystem I reaction center subunit IX
Gene (Uniprot):psaJ
Chain IDs:H (auth: J)
Chain Length:40
Number of Molecules:1
Biological Source:Synechocystis sp. (strain PCC 6803 / Kazusa)

UniProt ID:Q55329 Pfam ID:PF01701

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Photosystem I reaction center subunit PsaK 2
Gene (Uniprot):psaK2
Chain IDs:I (auth: K)
Chain Length:70
Number of Molecules:1
Biological Source:Synechocystis sp. (strain PCC 6803 / Kazusa)

UniProt ID:P74564 Pfam ID:PF01241

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Photosystem I reaction center subunit XI
Gene (Uniprot):psaL
Chain IDs:J (auth: L)
Chain Length:137
Number of Molecules:1
Biological Source:Synechocystis sp. (strain PCC 6803 / Kazusa)

UniProt ID:P37277 Pfam ID:PF02605

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Photosystem I reaction center subunit XII
Gene (Uniprot):psaM
Chain IDs:K (auth: M)
Chain Length:31
Number of Molecules:1
Biological Source:Synechocystis sp. (strain PCC 6803 / Kazusa)

UniProt ID:P72986 Pfam ID:PF07465

Ligand Molecules

45D

BCR

C7Z

CLA

ECH

EQ3

LHG

LMG

LMT

PQN

SF4

SQD

Primary Citation

Crystal Structure of Photosystem I Monomer From Synechocystis PCC 6803.

Netzer-El, S.Y, Caspy, I, Nelson, N.Show

Front Plant Sci 9 1865 1865 (2018)

PMID: 30662446 DOI: 10.3389/fpls.2018.01865

Abstact

A single histidine addition to the C-terminus of PsaL of Synechocystis 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 PsaLHIS strain show no effect on PSI activity in comparison to the WT trimeric PSI. Crystal structure of the PsaLHIS 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.

Legend

Protein

Chemical

Disease

Primary Citation of related structures

Abstact

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