Summary: Photosynthetic reaction centre, H-chain N-terminal region
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Photosynthetic reaction centre, H-chain N-terminal region Provide feedback
The family corresponds the N-terminal cytoplasmic domain.
Lancaster CR, Michel H; , J Mol Biol 1999;286:883-898.: Refined crystal structures of reaction centres from Rhodopseudomonas viridis in complexes with the herbicide atrazine and two chiral atrazine derivatives also lead to a new model of the bound carotenoid. PUBMED:10024457 EPMC:10024457
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This tab holds annotation information from the InterPro database.
InterPro entry IPR015810
The photosynthetic apparatus in non-oxygenic bacteria consists of light-harvesting (LH) protein-pigment complexes LH1 and LH2, which use carotenoid and bacteriochlorophyll as primary donors [PUBMED:11005826]. LH1 acts as the energy collection hub, temporarily storing it before its transfer to the photosynthetic reaction centre (RC) [PUBMED:15329728]. Electrons are transferred from the primary donor via an intermediate acceptor (bacteriopheophytin) to the primary acceptor (quinine Qa), and finally to the secondary acceptor (quinone Qb), resulting in the formation of ubiquinol QbH2. RC uses the excitation energy to shuffle electrons across the membrane, transferring them via ubiquinol to the cytochrome bc1 complex in order to establish a proton gradient across the membrane, which is used by ATP synthetase to form ATP [PUBMED:16931113, PUBMED:12872158, PUBMED:2676514].
The core complex is anchored in the cell membrane, consisting of one unit of RC surrounded by LH1; in some species there may be additional subunits [PUBMED:11095707]. RC consists of three subunits: L (light), M (medium), and H (heavy). Subunits L and M provide the scaffolding for the chromophore, while subunit H contains a cytoplasmic domain [PUBMED:8027023]. In Rhodopseudomonas viridis, there is also a non-membranous tetrahaem cytochrome (4Hcyt) subunit on the periplasmic surface.
This entry represents the N-terminal domain of the photosynthetic reaction centre H subunit, which includes the transmembrane domain and part of the cytoplasmic domain [PUBMED:10611277].
The mapping between Pfam and Gene Ontology is provided by InterPro. If you use this data please cite InterPro.
|Cellular component||plasma membrane light-harvesting complex (GO:0030077)|
|Molecular function||electron transporter, transferring electrons within the cyclic electron transport pathway of photosynthesis activity (GO:0045156)|
|Biological process||photosynthesis, light reaction (GO:0019684)|
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|Author:||Finn RD, Bateman A|
|Number in seed:||26|
|Number in full:||120|
|Average length of the domain:||133.60 aa|
|Average identity of full alignment:||45 %|
|Average coverage of the sequence by the domain:||51.83 %|
|HMM build commands:||
build method: hmmbuild -o /dev/null HMM SEED
search method: hmmsearch -Z 80369284 -E 1000 --cpu 4 HMM pfamseq
|Family (HMM) version:||9|
|Download:||download the raw HMM for this family|
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