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Annotation rule MF_00433
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General rule information [?]

Accession MF_00433
Dates 1-JUN-2001 (Created)
11-JAN-2021 (Last updated, Version 40)
Name Cytb6_f_PetL
Scope
Bacteria; Cyanobacteria
Plastid
Templates P50369 (PETL_CHLRE); P83795 (PETL_MASLA): [Recover all]
Triggered by

Propagated annotation [?]


Identifier, protein and gene names [?]

Identifier
PETL
Protein name
RecName: Full=Cytochrome b6-f complex subunit 6;
AltName: Full=Cytochrome b6-f complex subunit VI;
AltName: Full=Cytochrome b6-f complex subunit PetL;
Gene name
petL

Comments [?]

Function Component of the cytochrome b6-f complex, which mediates electron transfer between photosystem II (PSII) and photosystem I (PSI), cyclic electron flow around PSI, and state transitions. PetL is important for photoautotrophic growth as well as for electron transfer efficiency and stability of the cytochrome b6-f complex.
Subunit The 4 large subunits of the cytochrome b6-f complex are cytochrome b6, subunit IV (17 kDa polypeptide, PetD), cytochrome f and the Rieske protein, while the 4 small subunits are PetG, PetL, PetM and PetN. The complex functions as a dimer.
case <OG:Chloroplast>
Subcellular location Plastid, chloroplast thylakoid membrane; Single-pass membrane protein.
else case <OC:Gloeobacter>
Subcellular location Cell inner membrane; Single-pass membrane protein.
else
Subcellular location Cellular thylakoid membrane; Single-pass membrane protein.
end case
Similarity Belongs to the PetL family.

Keywords [?]

Transport
Photosynthesis
Electron transport
Membrane
Transmembrane
case <OC:Gloeobacter>
Cell membrane
Cell inner membrane
else
Thylakoid
end case
Transmembrane helix

Gene Ontology [?]

GO:0045158; Molecular function: electron transporter, transferring electrons within cytochrome b6/f complex of photosystem II activity.
case <OG:Chloroplast>
GO:0009535; Cellular component: chloroplast thylakoid membrane.
else case <OC:Gloeobacter>
GO:0005886; Cellular component: plasma membrane.
else
GO:0042651; Cellular component: thylakoid membrane.
end case

Cross-references [?]

Pfam PF05115; PetL; 1;

Computed features [?]

General Transmembrane; -; 1; trigger=yes;

Additional information [?]

Size range 28-43 amino acids
Related rules None
Fusion None
Comments Subject to RNA editing in many seed plants; the start and stop codons are created by RNA editing in all conifers examined so far. Is essential in C. reinhardtii, but not required for photosynthesis in N. tabacum. Additionally, some cyanobacteria, for example Synechocystis, do not have this protein.


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