NCBI Home Page NCBI Site Search page NCBI Guide that lists and describes the NCBI resources
Conserved domains on  [gi|375127462|gb|AFA36133|]
View 

PsbA, partial (chloroplast) [Cordia collococca]

Protein Classification

Graphical summary

 Zoom to residue level

show extra options »

Show site features     Horizontal zoom: ×

List of domain hits

Name Accession Description Interval E-value
Photo_RC super family cl08220
D1, D2 subunits of photosystem II (PSII); M, L subunits of bacterial photosynthetic reaction ...
2-24 7.43e-06

D1, D2 subunits of photosystem II (PSII); M, L subunits of bacterial photosynthetic reaction center; This protein superfamily contains the D1, D2 subunits of the photosystem II (PS II) and the M, L subunits of the bacterial photosynthetic reaction center (RC). These four proteins are highly homologous and share a common fold. PS II is a multi-subunit protein found in the photosynthetic membranes of plants, algae, and cyanobacteria. It utilizes light-induced electron transfer and water-splitting reactions to produce protons, electrons, and molecular oxygen. The protons generated are instrumental in ATP formation. Bacterial photosynthetic reaction center (RC) complex is found in photosynthetic bacteria, such as purple bacteria and other proteobacteria species. It couples light-induced electron transfer to proton pumping across the membrane by reactions of a quinone molecule (QB) that binds two electrons and two protons at the active site. Protons are translocated from the bacterial cytoplasm to the periplasmic space, generating an electrochemical gradient of protons (the protonmotive force) that can be used to power reactions such as the synthesis of ATP.


The actual alignment was detected with superfamily member PLN00056:

Pssm-ID: 447584  Cd Length: 353  Bit Score: 38.96  E-value: 7.43e-06
                         10        20
                 ....*....|....*....|...
gi 375127462   2 MHESNAHNFPLDLAAIEAPSTNG 24
Cdd:PLN00056 331 MHERNAHNFPLDLAAVEAPSTNG 353
 
Name Accession Description Interval E-value
PLN00056 PLN00056
photosystem Q(B) protein; Provisional
2-24 7.43e-06

photosystem Q(B) protein; Provisional


Pssm-ID: 177687  Cd Length: 353  Bit Score: 38.96  E-value: 7.43e-06
                         10        20
                 ....*....|....*....|...
gi 375127462   2 MHESNAHNFPLDLAAIEAPSTNG 24
Cdd:PLN00056 331 MHERNAHNFPLDLAAVEAPSTNG 353
Photosystem-II_D1 cd09289
D1 subunit of photosystem II (PS II); Photosystem II (PS II), D2 subunit. PS II is a ...
2-15 3.97e-04

D1 subunit of photosystem II (PS II); Photosystem II (PS II), D2 subunit. PS II is a multi-subunit protein found in the photosynthetic membranes of plants, algae, and cyanobacteria. It utilizes light-induced electron transfer and water-splitting reactions to produce protons, electrons, and molecular oxygen. The protons generated are instrumental in ATP formation. Molecular dioxygen is released as a by-product. PS II can be described as containing two parts: the photochemical part and the catalytic part. The photochemical portion promotes the fast, efficient light-induced charge separation and stabilization that occur when light is absorbed by chlorophyll. The catalytic portion, where water is oxidized, involves a cluster of Mn ions close to a redox-active tyrosine residue. The Mn cluster and its ligands form a functional unit called the oxygen-evolving complex (OEC) or the water-oxidizing complex (WOC). The D1 and D2 subunits are a pair of interwined polypeptides. They contain all the cofactors involved directly in water oxidation and plastoquinone reduction. The D1 subunit contains the Mn cluster that constitutes the site of water oxidation. D1 and D2 are highly homologous and are also similar to the L and M proteins in bacterial photosynthetic reaction centers.


Pssm-ID: 187747  Cd Length: 338  Bit Score: 34.09  E-value: 3.97e-04
                         10
                 ....*....|....
gi 375127462   2 MHESNAHNFPLDLA 15
Cdd:cd09289  325 MHERNAHNFPLDLA 338
 
Name Accession Description Interval E-value
PLN00056 PLN00056
photosystem Q(B) protein; Provisional
2-24 7.43e-06

photosystem Q(B) protein; Provisional


Pssm-ID: 177687  Cd Length: 353  Bit Score: 38.96  E-value: 7.43e-06
                         10        20
                 ....*....|....*....|...
gi 375127462   2 MHESNAHNFPLDLAAIEAPSTNG 24
Cdd:PLN00056 331 MHERNAHNFPLDLAAVEAPSTNG 353
Photosystem-II_D1 cd09289
D1 subunit of photosystem II (PS II); Photosystem II (PS II), D2 subunit. PS II is a ...
2-15 3.97e-04

D1 subunit of photosystem II (PS II); Photosystem II (PS II), D2 subunit. PS II is a multi-subunit protein found in the photosynthetic membranes of plants, algae, and cyanobacteria. It utilizes light-induced electron transfer and water-splitting reactions to produce protons, electrons, and molecular oxygen. The protons generated are instrumental in ATP formation. Molecular dioxygen is released as a by-product. PS II can be described as containing two parts: the photochemical part and the catalytic part. The photochemical portion promotes the fast, efficient light-induced charge separation and stabilization that occur when light is absorbed by chlorophyll. The catalytic portion, where water is oxidized, involves a cluster of Mn ions close to a redox-active tyrosine residue. The Mn cluster and its ligands form a functional unit called the oxygen-evolving complex (OEC) or the water-oxidizing complex (WOC). The D1 and D2 subunits are a pair of interwined polypeptides. They contain all the cofactors involved directly in water oxidation and plastoquinone reduction. The D1 subunit contains the Mn cluster that constitutes the site of water oxidation. D1 and D2 are highly homologous and are also similar to the L and M proteins in bacterial photosynthetic reaction centers.


Pssm-ID: 187747  Cd Length: 338  Bit Score: 34.09  E-value: 3.97e-04
                         10
                 ....*....|....
gi 375127462   2 MHESNAHNFPLDLA 15
Cdd:cd09289  325 MHERNAHNFPLDLA 338
 
Blast search parameters
Data Source: Precalculated data, version = cdd.v.3.21
Preset Options:Database: CDSEARCH/cdd   Low complexity filter: no  Composition Based Adjustment: yes   E-value threshold: 0.01

References:

  • Wang J et al. (2023), "The conserved domain database in 2023", Nucleic Acids Res.51(D)384-8.
  • Lu S et al. (2020), "The conserved domain database in 2020", Nucleic Acids Res.48(D)265-8.
  • Marchler-Bauer A et al. (2017), "CDD/SPARCLE: functional classification of proteins via subfamily domain architectures.", Nucleic Acids Res.45(D)200-3.
Help | Disclaimer | Write to the Help Desk
NCBI | NLM | NIH