A detailed cartoon model (revised, 2020) of the Z-scheme, legends:
Short form:
A detailed cartoon model of the Z-scheme including structural information on the organisation of the protein complexes involved in electron (e-) and proton (H+) transport within the thylakoid membrane of green plants (eukaryotes).
Relevant 3D information has been represented in 2D as reasonably as possible i.e. Subunit-subunit positioning, relative spatial positioning of co-factors. The electron transport scheme is based on a wide range of known literature, including reviews and text book figures, as well as numerous valuable discussions with many colleagues in the field.
Courtesy of Jon Nield, https://jonnield.com, UK;
freely available from this page.
https://www.jonnield.com/showcase/showcase.html
or
https://www.jonnield.com/showcase/showcase.html
Long form:
Cartoon model depicting the molecular machinery involved in the Z-scheme of oxygenic photosynthesis.
Structural information from e.g. Guskov et al., (2009; PSII); Stroebel et al., (2003; Cyt b6f); Jordan, et al., (2001; PSI); Amunts et al., (2007; LHCI-PSI).
Abbreviations: Lhca/b proteins: Light (hv) is captured and channelled to the P680 reaction centre of PSII, or the P700 reaction centre of PSI. PSII: In caps= psb gene products; P680= primary donor; Phe= pheophytin; QA,QB= secondary plastoquinone acceptors; PQ= plastoquinone. Cyt b6f: Caps= pet gene products; Cyt bH= high potential; Cyt bL= low potential; ISP= a ‘mobile’ Rieske Iron-Sulphur binding Protein, able to share its intrinsic/extrinsic domains across each monomer in the dimer, hence a/b; Note: total of 4 haem centres per monomer (Fe), including a new ‘haem ci’= possible link for cyclic e- transport; Q= quinone, Car= carotenoid, Chla= Chlorophyll a molecule. PSI: In caps= psa gene products; P700= primary donor; PC= plastocyanin; A0 (Chla), A1 (phylloquinone)= primary and intermediate e- acceptors; FA, FB and FX= bound FeS centres; Fd= ferredoxin. A, A' accessory chls are not shown. ATP synthase: oscp (oligomycin sensitivity conferring polypeptide).
Courtesy of Jon Nield, https://jonnield.com, UK; freely available from https://www.jonnield.com/showcase/showcase.html
Short form:
A detailed cartoon model of the Z-scheme including structural information on the organisation of the protein complexes involved in electron (e-) and proton (H+) transport within the thylakoid membrane of green plants (eukaryotes).
Relevant 3D information has been represented in 2D as reasonably as possible i.e. Subunit-subunit positioning, relative spatial positioning of co-factors. The electron transport scheme is based on a wide range of known literature, including reviews and text book figures, as well as numerous valuable discussions with many colleagues in the field.
Courtesy of Jon Nield, https://jonnield.com, UK;
freely available from this page.
https://www.jonnield.com/showcase/showcase.html
or
https://www.jonnield.com/showcase/showcase.html
Long form:
Cartoon model depicting the molecular machinery involved in the Z-scheme of oxygenic photosynthesis.
Structural information from e.g. Guskov et al., (2009; PSII); Stroebel et al., (2003; Cyt b6f); Jordan, et al., (2001; PSI); Amunts et al., (2007; LHCI-PSI).
Abbreviations: Lhca/b proteins: Light (hv) is captured and channelled to the P680 reaction centre of PSII, or the P700 reaction centre of PSI. PSII: In caps= psb gene products; P680= primary donor; Phe= pheophytin; QA,QB= secondary plastoquinone acceptors; PQ= plastoquinone. Cyt b6f: Caps= pet gene products; Cyt bH= high potential; Cyt bL= low potential; ISP= a ‘mobile’ Rieske Iron-Sulphur binding Protein, able to share its intrinsic/extrinsic domains across each monomer in the dimer, hence a/b; Note: total of 4 haem centres per monomer (Fe), including a new ‘haem ci’= possible link for cyclic e- transport; Q= quinone, Car= carotenoid, Chla= Chlorophyll a molecule. PSI: In caps= psa gene products; P700= primary donor; PC= plastocyanin; A0 (Chla), A1 (phylloquinone)= primary and intermediate e- acceptors; FA, FB and FX= bound FeS centres; Fd= ferredoxin. A, A' accessory chls are not shown. ATP synthase: oscp (oligomycin sensitivity conferring polypeptide).
Courtesy of Jon Nield, https://jonnield.com, UK; freely available from https://www.jonnield.com/showcase/showcase.html