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IPR005870 is a Cytochrome b6/f complex, subunit IV.
<p>This entry describes subunit IV of the cytochrome b6/f complex. The cyt b6/f complex is central to the functions of oxygenic photosynthetic electron transport in cyanobacteria and its equivalents in algae and higher plants, mediating electron transfer between photosystem II (PSII) and photosystem I (PSI) reaction centre complexes. The cyt b6f complex consists of a cytochrome b core, in addition to cytochrome f, Rieske 2Fe-2S, and subunits IV, V, VI, VII. The complex has a central quinone exchange cavity, which is defined by two monomers that resemble the respiratory cytochrome bc1 complex [[cite:PUB00034763]]. Cyt b6f has three prosthetic groups not found in cytbc1: chlorophyll-a, beta-carotene and a structurally unique covalently bound haem. The haem is thought to function in cyclic electron transport via anionic ferredoxin. Each monomer of the complex contains a molecule of chlorophyll-a and beta-carotene. Subunit IV is one of the principal subunits for the binding of the redox prosthetic groups.</p>
This description is obtained from EB-eye REST.
GO predictions are based solely on the InterPro-to-GO mappings published by EMBL-EBI, which are in turn based on the mapping of predicted domains to the InterPro dataset. The InterPro-to-GO mapping was last updated on , while the GO metadata was last updated on .
| GO term | Namespace | Name | Definition | Relationships |
|---|---|---|---|---|
| Biological process | Photosynthetic electron transport chain | A process, occurring as part of photosynthesis, in which light provides the energy for a series of electron carriers to operate together to transfer electrons and generate a transmembrane electrochemical gradient. | ||
| Cellular component | Thylakoid membrane | The pigmented membrane of any thylakoid. | ||
| Molecular function | Electron transporter, transferring electrons within the cyclic electron transport pathway of photosynthesis activity | Enables the directed movement of electrons within the cyclic electron transport pathway of photosynthesis. |
| Transcript | Name | Description | Predicted domains | Domain count |
|---|---|---|---|---|
| – | Cytochrome b6/f complex subunit IV (chloroplast) [Tectona grandis] gi|442742993|ref|YP_007353945.1| | 16 | ||
| – | Cytochrome b6/f complex subunit IV [Lotus japonicus] gi|13518469|ref|NP_084828.1| | 16 | ||
| – | Cytochrome b6-f complex subunit 4; TAIR: ATCG00730.1 photosynthetic electron transfer D (ChrC); Swiss-Prot: sp|Q9BBQ5|PETD_LOTJA Cytochrome b6-f complex subunit 4; TrEMBL-Plants: tr|A0A1D8R9R1|A0A1D8R9R1_9MAGN Cytochrome b6-f complex subunit 4; Found in the gene: LotjaGi5g1v0223700 | 18 | ||
| – | Cytochrome b6-f complex subunit 4; TAIR: ATCG00730.1 photosynthetic electron transfer D (ChrC); Swiss-Prot: sp|Q9BBQ5|PETD_LOTJA Cytochrome b6-f complex subunit 4; TrEMBL-Plants: tr|A0A1B1FK37|A0A1B1FK37_POGCB Cytochrome b6-f complex subunit 4; Found in the gene: LotjaGi5g1v0223700 | 17 |
A list of co-occurring predicted domains within the L. japonicus gene space:
| Predicted domain | Source | Observations | Saturation (%) |
|---|---|---|---|
| cd00290 | CDD | 1 | 25.00 |