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IPR001280 is a Photosystem I PsaA/PsaB.
<p>Photosystem I (PSI) [[cite:PUB00000583]] is an integral membrane protein complex that uses light energy to mediate electron transfer from plastocyanin to ferredoxin. PSI is found in the chloroplast of plants and cyanobacteria. The electron transfer components of the reaction centre of PSI are a primary electron donor P-700 (chlorophyll dimer) and five electron acceptors: A0 (chlorophyll), A1 (a phylloquinone) and three 4Fe-4S iron-sulphur centres: Fx, Fa, and Fb.</p> <p>PsaA and psaB, two closely related proteins, are involved in the binding of P700, A0, A1, and Fx. psaA and psaB are both integral membrane proteins of 730 to 750 amino acids that seem to contain 11 transmembrane segments. The Fx 4Fe-4S iron-sulphur centre is bound by four cysteines; two of these cysteines are provided by the psaA protein and the two others by psaB. The two cysteines in both proteins are proximal and located in a loop between the ninth and tenth transmembrane segments. A leucine zipper motif seems to be present [[cite:PUB00001586]] downstream of the cysteines and could contribute to dimerisation of psaA/psaB.</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 |
|---|---|---|---|---|
| Cellular component | Thylakoid | A membranous cellular structure that bears the photosynthetic pigments in plants, algae, and cyanobacteria. In cyanobacteria thylakoids are of various shapes and are attached to, or continuous with, the plasma membrane. In eukaryotes they are flattened, membrane-bounded disk-like structures located in the chloroplasts; in the chloroplasts of higher plants the thylakoids form dense stacks called grana. Isolated thylakoid preparations can carry out photosynthetic electron transport and the associated phosphorylation. | ||
| Biological process | Photosynthesis | The synthesis by organisms of organic chemical compounds, especially carbohydrates, from carbon dioxide (CO2) using energy obtained from light rather than from the oxidation of chemical compounds. | ||
| Cellular component | Integral component of membrane | The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane. |
| Transcript | Name | Description | Predicted domains | Domain count |
|---|---|---|---|---|
| – | Photosystem I P700 chlorophyll a apoprotein A2 [Lotus japonicus] gi|13518429|ref|NP_084789.1| | 17 | ||
| – | Photosystem I P700 chlorophyll a apoprotein A1 [Lotus japonicus] gi|13518428|ref|NP_084788.1| | 6 | ||
| – | Photosystem I P700 apoprotein A1, partial (chloroplast) [Camellia sinensis] gi|403065237|gb|AFR13040.1| | 5 | ||
| – | Photosystem I P700 chlorophyll a apoprotein A2 [Lotus japonicus] gi|13518429|ref|NP_084789.1| | 20 | ||
| – | PREDICTED: transcription initiation factor IIF subunit alpha-like [Glycine max] gi|356555722|ref|XP_003546179.1| | 11 | ||
| – | PREDICTED: transcription initiation factor IIF subunit alpha-like [Glycine max] gi|356555722|ref|XP_003546179.1| | 11 | ||
| – | PREDICTED: transcription initiation factor IIF subunit alpha-like [Glycine max] gi|356555722|ref|XP_003546179.1| | 11 | ||
| – | PREDICTED: transcription initiation factor IIF subunit alpha-like isoform X1 [Cicer arietinum] gi|502079291|ref|XP_004486214.1| | 8 | ||
| – | Photosystem I P700 chlorophyll a apoprotein A1 [Lotus japonicus] gi|13518428|ref|NP_084788.1| | 13 | ||
| – | Photosystem I P700 chlorophyll a apoprotein A2; TAIR: ATCG00340.1 Photosystem I, PsaA/PsaB protein (ChrC); Swiss-Prot: sp|P58385|PSAB_LOTJA Photosystem I P700 chlorophyll a apoprotein A2; TrEMBL-Plants: tr|A0A178W009|A0A178W009_ARATH PSAB; Found in the gene: LotjaGi3g1v0022000 | 21 | ||
| – | Photosystem I P700 chlorophyll a apoprotein A2; TAIR: ATCG00340.1 Photosystem I, PsaA/PsaB protein (ChrC); Swiss-Prot: sp|P58385|PSAB_LOTJA Photosystem I P700 chlorophyll a apoprotein A2; TrEMBL-Plants: tr|A0A178W009|A0A178W009_ARATH PSAB; Found in the gene: LotjaGi3g1v0022000 | 21 | ||
| – | Photosystem I P700 chlorophyll a apoprotein A2; TAIR: ATCG00340.1 Photosystem I, PsaA/PsaB protein (ChrC); Swiss-Prot: sp|P58385|PSAB_LOTJA Photosystem I P700 chlorophyll a apoprotein A2; TrEMBL-Plants: tr|A0A178W009|A0A178W009_ARATH PSAB; Found in the gene: LotjaGi3g1v0022000 | 21 | ||
| – | Photosystem I P700 chlorophyll a apoprotein A2; TAIR: ATCG00340.1 Photosystem I, PsaA/PsaB protein (ChrC); Swiss-Prot: sp|P58385|PSAB_LOTJA Photosystem I P700 chlorophyll a apoprotein A2; TrEMBL-Plants: tr|A0A0K0LWC0|A0A0K0LWC0_9FABA Photosystem I P700 chlorophyll a apoprotein A2; Found in the gene: LotjaGi3g1v0022000 | 16 |
A list of co-occurring predicted domains within the L. japonicus gene space:
| Predicted domain | Source | Observations | Saturation (%) |
|---|---|---|---|
| TRANSMEMBRANE | Phobius | 1 | 7.69 |