Protein Domain : IPR006217

Type:  Family Name:  Photosystem II cytochrome b559, alpha subunit
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 alpha subunit (PsbE) of cytochrome b559, which forms a haem-binding heterodimer with the beta subunit (PsbF) () within the reaction centre core of PSII. Both PsbE and PsbF are essential components for PSII assembly, and are probably involved in secondary electron transport mechanisms that help to protect PSII from photo-damage []. Short Name:  PSII_cyt_b559_asu
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0 Child Features

3 Contains

DB identifier Type Name
IPR013081 Domain Photosystem II cytochrome b559, N-terminal
IPR013082 Domain Photosystem II cytochrome b559, alpha subunit, lumenal region
IPR006216 Conserved_site Photosystem II cytochrome b559, conserved site

3 Cross Referencess

Identifier
PIRSF000036
TIGR01332
MF_00642

0 Found In

5 GO Annotations

GO Term Gene Name
GO:0020037 IPR006217
GO:0009767 IPR006217
GO:0015979 IPR006217
GO:0019684 IPR006217
GO:0009523 IPR006217

5 Ontology Annotations

GO Term Gene Name
GO:0020037 IPR006217
GO:0009767 IPR006217
GO:0015979 IPR006217
GO:0019684 IPR006217
GO:0009523 IPR006217

0 Parent Features

546 Proteins

DB identifier UniProt Accession Secondary Identifier Organism Name Length
137822 C7B2G7 PAC:15422911 Selaginella moellendorffii 83  
evm.TU.contig_44335.1 PAC:16432002 Carica papaya 82  
ATCG00580.1 PAC:19637986 Arabidopsis thaliana 83  
Thhalv10011089m V4LQ54 PAC:20207390 Eutrema salsugineum 94  
Potri.011G095300.1 A0A2K1YHW4 PAC:27002862 Populus trichocarpa 83  
Gorai.004G103400.1 A0A0D2R2A2 PAC:26775885 Gossypium raimondii 192  
Gorai.004G154900.1 A0A0D2QY91 PAC:26775282 Gossypium raimondii 114  
21090 PAC:27390905 Coccomyxa subellipsoidea C-169 83  
Migut.M00619.1.p A0A022RYB3 PAC:28948824 Mimulus guttatus 85  
Glyma.12G232700.1.p K7LWI6 PAC:30548962 Glycine max 142  
Glyma.15G238700.1.p A0A0R0G5G5 PAC:30497913 Glycine max 83  
Medtr4g050850.1 G7JFY7 PAC:31115005 Medicago truncatula 136  
Medtr5g055290.1 G7JZF9 PAC:31090303 Medicago truncatula 83  
Medtr0002s0700.1 A0A072TW22 PAC:31084728 Medicago truncatula 83  
evm_27.model.AmTr_v1.0_scaffold00334.2 W1P5D5 PAC:31549304 Amborella trichopoda 162  
Traes_1AL_C66F70A34.1 PAC:31823976 Triticum aestivum 83  
Traes_1AL_08A2F5FA4.1 PAC:32014375 Triticum aestivum 83  
Traes_1AL_655726D7B.1 PAC:31984843 Triticum aestivum 83  
Traes_1AL_9A9B26465.1 PAC:31738594 Triticum aestivum 83  
Traes_1AS_5320E59A6.1 PAC:31957292 Triticum aestivum 83  
Traes_1BL_5320E59A6.1 PAC:31754638 Triticum aestivum 83  
Traes_1BS_5320E59A6.1 PAC:31773667 Triticum aestivum 83  
Traes_1BS_9A9B26465.1 PAC:31972398 Triticum aestivum 83  
Traes_1DL_E50A6EE94.1 PAC:31852319 Triticum aestivum 59  
Traes_1DL_77FB40598.1 PAC:32011268 Triticum aestivum 45  
Traes_1DS_9A9B264651.1 PAC:31870343 Triticum aestivum 83  
Traes_1DS_5320E59A6.1 PAC:31964249 Triticum aestivum 83  
Traes_1DS_9A9B26465.1 PAC:31744625 Triticum aestivum 83  
Traes_2AL_5320E59A6.1 PAC:32009231 Triticum aestivum 83  
Traes_2AL_9A9B26465.1 PAC:31911207 Triticum aestivum 83  

4 Publications

First Author Title Year Journal Volume Pages PubMed ID
            12518057
            14871485
            15100025
            12560096