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IPR002683 is a PsbP, C-terminal.
<p>In PSII, the oxygen-evolving complex (OEC) is responsible for catalysing the splitting of water to O(2) and 4H+. The OEC is composed of a cluster of manganese, calcium and chloride ions bound to extrinsic proteins. In cyanobacteria there are five extrinsic proteins in OEC (PsbO, PsbP-like, PsbQ-like, PsbU and PsbV), while in plants there are only three (PsbO, PsbP and PsbQ), PsbU and PsbV having been lost during the evolution of green plants [[cite:PUB00015369]].</p> <p>This entry represents the C-terminal domain found in PSII OEC protein PsbP. Both PsbP and PsbQ ([interpro:IPR008797]) are regulators that are necessary for the biogenesis of optically active PSII. PsbP increases the affinity of the water oxidation site for chloride ions and provides the conditions required for high affinity binding of calcium ions [[cite:PUB00001121], [cite:PUB00002976]]. The crystal structure of PsbP from Nicotiana tabacum (Common tobacco) revealed a two-domain structure, where domain 1 may play a role in the ion retention activity in PSII, the N-terminal residues being essential for calcium and chloride ion retention activity [[cite:PUB00015371]]. PsbP is encoded in the nuclear genome in plants.</p> <p>PSII is a multisubunit protein-pigment complex containing polypeptides both intrinsic and extrinsic to the photosynthetic membrane [[cite:PUB00152828], [cite:PUB00015357], [cite:PUB00015358], [cite:PUB00097583]]. Within the core of the complex, the chlorophyll and β-carotene pigments are mainly bound to the antenna proteins CP43 (PsbC) and CP47 (PsbB), which pass the excitation energy on to the reaction centre proteins D1 (Qb, PsbA) and D2 (Qa, PsbD) that bind all the redox-active cofactors involved in the energy conversion process. The PSII oxygen-evolving complex (OEC) oxidises water to provide protons for use by PSI, and consists of OEE1 (PsbO), OEE2 (PsbP) and OEE3 (PsbQ). The remaining subunits in PSII are of low molecular weight (less than 10kDa), and are involved in PSII assembly, stabilisation, dimerisation, and photo-protection [[cite:PUB00015359]].</p> <p>Oxygenic photosynthesis uses two multi-subunit photosystems (I and II) located in the cell membranes of cyanobacteria and in the thylakoid membranes of chloroplasts in plants and algae. Photosystem II (PSII) has a P680 reaction centre containing chlorophyll 'a' that uses light energy to carry out the oxidation (splitting) of water molecules, and to produce ATP via a proton pump. Photosystem I (PSI) has a P700 reaction centre containing chlorophyll that takes the electron and associated hydrogen donated from PSII to reduce NADP+ to NADPH. Both ATP and NADPH are subsequently used in the light-independent reactions to convert carbon dioxide to glucose using the hydrogen atom extracted from water by PSII, releasing oxygen as a by-product [[cite:PUB00152828]].</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 |
|---|---|---|---|---|
| Molecular function | Calcium ion binding | Interacting selectively and non-covalently with calcium ions (Ca2+). | ||
| Cellular component | Photosystem II | A photosystem that contains a pheophytin-quinone reaction center with associated accessory pigments and electron carriers. In cyanobacteria and chloroplasts, in the presence of light, PSII functions as a water-plastoquinone oxidoreductase, transferring electrons from water to plastoquinone, whereas other photosynthetic bacteria carry out anoxygenic photosynthesis and oxidize other compounds to re-reduce the photoreaction center. | ||
| Cellular component | Photosystem II oxygen evolving complex | A complex, composed of a cluster of manganese, calcium and chloride ions bound to extrinsic proteins, that catalyzes the splitting of water to O2 and 4 H+. In cyanobacteria there are five extrinsic proteins in OEC (PsbO, PsbP-like, PsbQ-like, PsbU and PsbV), while in plants there are only three (PsbO, PsbP and PsbQ). | ||
| 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 | Extrinsic component of membrane | The component of a membrane consisting of gene products and protein complexes that are loosely bound to one of its surfaces, but not integrated into the hydrophobic region. |
| Transcript | Name | Description | Predicted domains | Domain count |
|---|---|---|---|---|
| – | PREDICTED: psbP-like protein 2, chloroplastic-like [Cicer arietinum] gi|502121406|ref|XP_004497306.1| | 8 | ||
| – | PREDICTED: psbP-like protein 2, chloroplastic-like [Glycine max] gi|356536494|ref|XP_003536772.1| | 7 | ||
| – | PREDICTED: psbP domain-containing protein 5, chloroplastic-like [Glycine max] gi|356515500|ref|XP_003526438.1| | 7 | ||
| – | PREDICTED: thylakoid lumenal 19 kDa protein, chloroplastic-like [Glycine max] gi|356557150|ref|XP_003546881.1| | 8 | ||
| – | PREDICTED: psbP-like protein 1, chloroplastic-like [Glycine max] gi|356499671|ref|XP_003518660.1| | 8 | ||
| – | PREDICTED: psbP-like protein 1, chloroplastic-like isoform X2 [Cicer arietinum] gi|502102481|ref|XP_004492089.1| | 7 | ||
| – | PREDICTED: psbP domain-containing protein 3, chloroplastic-like [Glycine max] gi|356508481|ref|XP_003522985.1| | 7 | ||
| – | PsbP domain-containing protein [Medicago truncatula] gi|357509231|ref|XP_003624904.1| | 7 | ||
| – | PREDICTED: oxygen-evolving enhancer protein 2, chloroplastic-like [Glycine max] gi|356526942|ref|XP_003532074.1| | 7 | ||
| – | PREDICTED: psbP domain-containing protein 1, chloroplastic-like [Glycine max] gi|356505763|ref|XP_003521659.1| | 7 | ||
| – | PREDICTED: LOW QUALITY PROTEIN: psbP domain-containing protein 1, chloroplastic-like [Glycine max] gi|356571066|ref|XP_003553702.1| | 13 | ||
| – | Oxygen-evolving enhancer protein 2-1, chloroplastic; TAIR: AT1G06680.1 photosystem II subunit P-1; Swiss-Prot: sp|Q7DM39|PSBP1_TOBAC Oxygen-evolving enhancer protein 2-1, chloroplastic; TrEMBL-Plants: tr|A0A151U238|A0A151U238_CAJCA Uncharacterized protein; Found in the gene: LotjaGi1g1v0046600 | 7 | ||
| – | Oxygen-evolving enhancer protein 2-1, chloroplastic; TAIR: AT1G06680.1 photosystem II subunit P-1; Swiss-Prot: sp|P16059|PSBP_PEA Oxygen-evolving enhancer protein 2, chloroplastic; TrEMBL-Plants: tr|A0A0L9UVJ1|A0A0L9UVJ1_PHAAN Uncharacterized protein; Found in the gene: LotjaGi1g1v0046600 | 7 | ||
| – | Photosystem II reaction center PsbP family protein; TAIR: AT1G77090.1 thylakoid lumenal protein (Mog1/PsbP/DUF1795-like photosystem II reaction center PsbP family protein); Swiss-Prot: sp|O49292|PPD4_ARATH PsbP domain-containing protein 4, chloroplastic; TrEMBL-Plants: tr|A0A151TSA0|A0A151TSA0_CAJCA Uncharacterized protein; Found in the gene: LotjaGi1g1v0272900 | 7 | ||
| – | Photosystem II reaction center PsbP family protein; TAIR: AT5G11450.2 PsbP domain protein (Mog1/PsbP/DUF1795-like photosystem II reaction center PsbP family protein); Swiss-Prot: sp|P82715|PPD5_ARATH PsbP domain-containing protein 5, chloroplastic; TrEMBL-Plants: tr|I3T9M5|I3T9M5_LOTJA Uncharacterized protein; Found in the gene: LotjaGi1g1v0389800 | 7 | ||
| – | Lumenal PsbP-like protein; TAIR: AT3G63540.1 thylakoid lumenal protein (Mog1/PsbP/DUF1795-like photosystem II reaction center PsbP family protein); Swiss-Prot: sp|P82658|TL19_ARATH Thylakoid lumenal 19 kDa protein, chloroplastic; TrEMBL-Plants: tr|I1KTL9|I1KTL9_SOYBN Uncharacterized protein; Found in the gene: LotjaGi1g1v0517700 | 8 | ||
| – | PsbP-like protein 1; TAIR: AT3G55330.1 PsbP-like protein 1; Swiss-Prot: sp|P82538|PPL1_ARATH PsbP-like protein 1, chloroplastic; TrEMBL-Plants: tr|I3S322|I3S322_LOTJA Uncharacterized protein; Found in the gene: LotjaGi1g1v0533900 | 8 | ||
| – | PsbP-like protein 1; TAIR: AT3G55330.1 PsbP-like protein 1; Swiss-Prot: sp|P82538|PPL1_ARATH PsbP-like protein 1, chloroplastic; TrEMBL-Plants: tr|I3S322|I3S322_LOTJA Uncharacterized protein; Found in the gene: LotjaGi1g1v0533900 | 7 | ||
| – | Photosystem II reaction center PsbP family protein; TAIR: AT1G76450.1 Photosystem II reaction center PsbP family protein; Swiss-Prot: sp|Q9S720|PPD3_ARATH PsbP domain-containing protein 3, chloroplastic; TrEMBL-Plants: tr|I3T8K8|I3T8K8_LOTJA Uncharacterized protein; Found in the gene: LotjaGi1g1v0569700 | 7 | ||
| – | Photosystem II reaction center PsbP family protein; TAIR: AT3G56650.1 thylakoid lumenal protein (Mog1/PsbP/DUF1795-like photosystem II reaction center PsbP family protein); Swiss-Prot: sp|Q9LXX5|PPD6_ARATH PsbP domain-containing protein 6, chloroplastic; TrEMBL-Plants: tr|A0A1J7HRX1|A0A1J7HRX1_LUPAN Uncharacterized protein; Found in the gene: LotjaGi1g1v0658600 | 8 | ||
| – | PsbP-domain protein 1; TAIR: AT4G15510.1 Photosystem II reaction center PsbP family protein; Swiss-Prot: sp|O23403|PPD1_ARATH PsbP domain-containing protein 1, chloroplastic; TrEMBL-Plants: tr|I3SFZ1|I3SFZ1_LOTJA Uncharacterized protein; Found in the gene: LotjaGi2g1v0222700 | 8 | ||
| – | PsbP-like protein 1; TAIR: AT4G15510.1 Photosystem II reaction center PsbP family protein; Swiss-Prot: sp|O23403|PPD1_ARATH PsbP domain-containing protein 1, chloroplastic; TrEMBL-Plants: tr|I3SFZ1|I3SFZ1_LOTJA Uncharacterized protein; Found in the gene: LotjaGi2g1v0222700 | 14 | ||
| – | PsbP-domain protein 1; TAIR: AT4G15510.1 Photosystem II reaction center PsbP family protein; Swiss-Prot: sp|O23403|PPD1_ARATH PsbP domain-containing protein 1, chloroplastic; TrEMBL-Plants: tr|I3SFZ1|I3SFZ1_LOTJA Uncharacterized protein; Found in the gene: LotjaGi2g1v0222700 | 7 | ||
| – | PsbP family protein, expressed; TAIR: AT3G05410.2 Photosystem II reaction center PsbP family protein; Swiss-Prot: sp|F4J7A7|PPD7_ARATH PsbP domain-containing protein 7, chloroplastic; TrEMBL-Plants: tr|A0A151U4S5|A0A151U4S5_CAJCA Uncharacterized protein; Found in the gene: LotjaGi5g1v0222100 | 11 | ||
| – | Photosystem II reaction center PsbP family protein; TAIR: AT3G05410.2 Photosystem II reaction center PsbP family protein; Swiss-Prot: sp|F4J7A7|PPD7_ARATH PsbP domain-containing protein 7, chloroplastic; TrEMBL-Plants: tr|A0A151U4S5|A0A151U4S5_CAJCA Uncharacterized protein; Found in the gene: LotjaGi5g1v0222100 | 11 | ||
| – | PsbP-like protein 2; TAIR: AT2G39470.1 PsbP-like protein 2; Swiss-Prot: sp|O80634|PNSL1_ARATH Photosynthetic NDH subunit of lumenal location 1, chloroplastic; TrEMBL-Plants: tr|I3SJS5|I3SJS5_LOTJA Uncharacterized protein; Found in the gene: LotjaGi5g1v0357400 | 8 | ||
| – | Oxygen-evolving enhancer 2-1, chloroplastic; TAIR: AT1G06680.1 photosystem II subunit P-1; Swiss-Prot: sp|P16059|PSBP_PEA Oxygen-evolving enhancer protein 2, chloroplastic; TrEMBL-Plants: tr|I3T637|I3T637_LOTJA Uncharacterized protein; Found in the gene: LotjaGi6g1v0184900 | 7 |
A list of co-occurring predicted domains within the L. japonicus gene space:
| Predicted domain | Source | Observations | Saturation (%) |
|---|---|---|---|
| SSF55724 | SUPERFAMILY | 1 | 3.70 |