MetaCyc Reaction:

Superclasses: Reactions Classified By Conversion TypeSimple ReactionsChemical ReactionsComposite ReactionsElectron-Transfer-Reactions
Reactions Classified By Conversion TypeSimple ReactionsChemical Reactions
Reactions Classified By SubstrateSmall-Molecule Reactions

EC Number:

Enzymes and Genes:

Arabidopsis thaliana col: photosystem IIInferred from experiment: psbS, psbQ, PPD1, PPD2, PPD3, PPD4, PPD5, PPD6, psbI, psbH, psbE, psbC, psbB, psbO, psbR, psbY, psbX, psbW, psbD, psbA
Chlamydomonas reinhardtii: photosystem IITraceable author statement to experimental support: LHCBM9, LHCBM8, LHCBM7, LHCBM6, LHCBM5, LHCBM4, LHCBM3, LHCBM2, LHCBM1, LHCB5, LHCB4, PSBO, PSBP1, PSBQ, psbT, PsbR, psbM, psbL, psbJ, psbH, psbA, psbD, psbE, psbB, psbC, psbK, PSBW, psbZ
Synechococcus elongatus PCC 7942: photosystem IITraceable author statement to experimental support: psbA1, psbD1, psbE, psbF, psbB, psbC, psbH, psbM, psbN, psbO, psbT, psbU, psbI, psbJ, psbK, psbL, psbV, psbW, psbX
Synechocystis sp. PCC 6803: photosystem IIInferred from experiment: psbX, psbW, psbV, psbU, psbT, psbO, psbN, psbM, psbL, psbK, psbJ, psbI, psbH, psbE, psbF, psbC, psbB, psbA1, psbD

In Pathway: photosynthesis light reactions

Transport reaction diagram

Reaction Locations: chloroplast thylakoid membrane

The direction shown, i.e. which substrates are on the left and right sides, is in accordance with the Enzyme Commission system.

Most BioCyc compounds have been protonated to a reference pH value of 7.3. Please see the PGDB Concepts Guide for more information.

Mass balance status: Balanced.

Enzyme Commission Primary Name: photosystem II

Enzyme Commission Summary:
Contains chlorophyll a, β-carotene, pheophytin, plastoquinone, a Mn4Ca cluster, heme and non-heme iron. Four successive photoreactions, resulting in a storage of four positive charges, are required to oxidize two water molecules to one oxygen molecule.

Citations: [Guskov09, Knaff77]

Gene-Reaction Schematic

Gene-Reaction Schematic

Unification Links: Rhea:30250

Relationship Links: BRENDA:EC:, ENZYME:EC:, IUBMB-ExplorEnz:EC:

Revised 01-Feb-2011 by Caspi R, SRI International


Guskov09: Guskov A, Kern J, Gabdulkhakov A, Broser M, Zouni A, Saenger W (2009). "Cyanobacterial photosystem II at 2.9-A resolution and the role of quinones, lipids, channels and chloride." Nat Struct Mol Biol 16(3);334-42. PMID: 19219048

Knaff77: Knaff DB, Malkin R, Myron JC, Stoller M (1977). "The role of plastoquinone and beta-carotene in the primary reaction of plant photosystem II." Biochim Biophys Acta 459(3);402-11. PMID: 849432

Report Errors or Provide Feedback
Please cite the following article in publications resulting from the use of MetaCyc: Caspi et al, Nucleic Acids Research 42:D459-D471 2014
Page generated by Pathway Tools version 20.0 (software by SRI International) on Fri May 6, 2016, BIOCYC14.