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1.97.1.12: photosystem I

This is an abbreviated version!
For detailed information about photosystem I, go to the full flat file.

Word Map on EC 1.97.1.12

Reaction

reduced plastocyanin
+
oxidized ferredoxin
+
hnu
=
oxidized plastocyanin
+
reduced ferredoxin

Synonyms

OsCRR6, photosystem I P700 chlorophyll a apoprotein A2, PS I, PS-I, PS-I complex, PsaB, PsaF, PSI, PSI core complex

ECTree

     1 Oxidoreductases
         1.97 Other oxidoreductases
             1.97.1 Sole sub-subclass for oxidoreductases that do not belong in the other subclasses
                1.97.1.12 photosystem I

Subunits

Subunits on EC 1.97.1.12 - photosystem I

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SUBUNIT
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
?
-
21000-22000 Da, photosystem 1 subunit PsaF that is involved in the docking of the electron-donor proteins plastocyanin and cytochrome c6, SDS-PAGE
dimer
in strain TS-821 PSI forms tetrameric, dimeric, and monomeric species, a tetrameric PSI has two PSI dimers associated together with interdimer gaps, while the PSI dimer is composed of two tightly tethered PSI monomers, subunit organization, structure comparisons, overview
heterotetramer
two-dimensional maps obtained by single particle electron microscopy clearly show that the tetramer lacks four-fold symmetry and is actually composed of a dimer of dimers with C2 symmetry, cryo-electron microscopy is used for 3D reconstruction of the PSI tetramer complex and a 3D model at 11.5 A resolution is obtained. A 2D map within the membrane plane of about 6.1 A is used for modeling, structure model comparison with the PSI structure of Thermosynechococcus elongatus at 2.5 A, PDB ID 1JB0, overview. The PsaL subunit of strain TS-821 is modeled using PsaL subunit of Pisum sativum as a template, PDB ID 4Y28L. The modeled PsaL subunit of TS-821 is used to substitute the existing PsaL subunit in crystal structure of Thermosynechococcus elongatus and most of the subunits from the crystal structure of Thermosynechococcus elongatus are fitted separately into the 3D volumemap of TS-821. Comparison of trimeric interface of Thermosynechococcus elongatus with interface type 1 of TS-821
monomer
tetramer
in strain TS-821 PSI forms tetrameric, dimeric, and monomeric species, a tetrameric PSI has two PSI dimers associated together with interdimer gaps, while the PSI dimer is composed of two tightly tethered PSI monomers, subunit organization, structure comparisons, overview
trimer
additional information