Protein Domain : IPR001743

Type:  Family Name:  Photosystem II PsbT
Description:  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.PSII is a multisubunit protein-pigment complex containing polypeptides both intrinsic and extrinsic to the photosynthetic membrane [, ]. Within the core of the complex, the chlorophyll and beta-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 10 kDa), and are involved in PSII assembly, stabilisation, dimerisation, and photo-protection []. This family represents the low molecular weight transmembrane protein PsbT found in PSII, which is thought to be associated with the D1 (PsbA) - D2 (PsbD) heterodimer. PsbT may be involved in the formation and/or stabilisation of dimeric PSII complexes, because in the absence of this protein dimeric PSII complexes were found to be less abundant. Furthermore, although PsbT does not confer photo-protection, it is required for the efficient recovery of photo-damaged PSII []. Short Name:  PSII_PsbT
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0 Child Features

0 Contains

3 Cross Referencess

Identifier
PF01405
PD004453
MF_00808

0 Found In

4 GO Annotations

GO Term Gene Name
GO:0015979 IPR001743
GO:0009523 IPR001743
GO:0009539 IPR001743
GO:0016020 IPR001743

4 Ontology Annotations

GO Term Gene Name
GO:0015979 IPR001743
GO:0009523 IPR001743
GO:0009539 IPR001743
GO:0016020 IPR001743

0 Parent Features

321 Proteins

DB identifier UniProt Accession Secondary Identifier Organism Name Length
ATCG00690.1 P61839 PAC:19637980 Arabidopsis thaliana 33  
Potri.011G113800.1 A0A2K1YIS1 PAC:27001212 Populus trichocarpa 33  
Gorai.004G107800.1 A0A0D2R2F0 PAC:26773297 Gossypium raimondii 35  
Gorai.005G110400.1 A0A0D2S876 PAC:26801472 Gossypium raimondii 35  
Gorai.008G093900.1 A0A0D2SRT6 PAC:26814253 Gossypium raimondii 33  
Migut.F01506.1.p PAC:28932828 Mimulus guttatus 35  
Glyma.15G262700.1.p A0A0R0GEW8 PAC:30499287 Glycine max 34  
Bostr.25219s0174.1.p PAC:30671850 Boechera stricta 32  
Bradi5g09703.1.p PAC:31145556 Brachypodium distachyon 35  
Bradi5g09698.1.p PAC:31148369 Brachypodium distachyon 35  
Spipo0G0110500 PAC:31509256 Spirodela polyrhiza 31  
Traes_7DS_CC42E56C9.2 PAC:31857688 Triticum aestivum 37  
Sevir.6G118800.1.p PAC:32642510 Setaria viridis 33  
Seita.J014100.1.p U5TU56 PAC:32706105 Setaria italica 33  
Bradi1g05739.1.p PAC:32806236 Brachypodium distachyon 35  
Bradi1g05742.1.p PAC:32793297 Brachypodium distachyon 35  
Bradi5g09704.1.p A0A0Q3H344 PAC:32811860 Brachypodium distachyon 35  
Pp3c21_5650V3.2.p PAC:32916112 Physcomitrium patens 157  
Aqcoe6G264200.1.p PAC:33063692 Aquilegia coerulea 33  
Aqcoe3G240400.1.p PAC:33094976 Aquilegia coerulea 33  
Aqcoe2G201100.1.p PAC:33057478 Aquilegia coerulea 33  
Brdisv1Per11046088m.p B3TN76 PAC:33248243 Brachypodium distachyon Per1 35  
Brdisv1Bd3-1_r1036962m.p PAC:33332242 Brachypodium distachyon Bd3-1 51  
Brdisv1BdTR7a1045697m.p B3TN76 PAC:33377799 Brachypodium distachyon BdTR7a 35  
Brdisv1Koz-11013770m.p PAC:33409684 Brachypodium distachyon Koz-1 35  
Brdisv1Koz-11046938m.p PAC:33387354 Brachypodium distachyon Koz-1 35  
Brdisv1Koz-11047152m.p PAC:33388163 Brachypodium distachyon Koz-1 35  
Brdisv1Koz-11046957m.p PAC:33387001 Brachypodium distachyon Koz-1 35  
Brdisv1Koz-11047051m.p PAC:33387498 Brachypodium distachyon Koz-1 35  
Brdisv20Bd21Ref1044865m.p PAC:33459209 Brachypodium distachyon Bd21 AnntCtrl 35  

4 Publications

First Author Title Year Journal Volume Pages PubMed ID
            12518057
            14871485
            15100025
            11451956