6kaf

Structural highlights

Function

[PSBB_CHLRE] One of the components of the core complex of photosystem II (PSII). It binds chlorophyll and helps catalyze the primary light-induced photochemical processes of PSII. PSII is a light-driven water:plastoquinone oxidoreductase, using light energy to abstract electrons from H(2)O, generating O(2) and a proton gradient subsequently used for ATP formation. [PSBE_CHLRE] This b-type cytochrome is tightly associated with the reaction center of photosystem II (PSII). PSII is a light-driven water:plastoquinone oxidoreductase that uses light energy to abstract electrons from H(2)O, generating O(2) and a proton gradient subsequently used for ATP formation. It consists of a core antenna complex that captures photons, and an electron transfer chain that converts photonic excitation into a charge separation.[HAMAP-Rule:MF_00642] [PSBA_CHLRE] This is one of the two reaction center proteins of photosystem II. Photosystem II (PSII) is a light-driven water:plastoquinone oxidoreductase that uses light energy to abstract electrons from H(2)O, generating O(2) and a proton gradient subsequently used for ATP formation. It consists of a core antenna complex that captures photons, and an electron transfer chain that converts photonic excitation into a charge separation. The D1/D2 (PsbA/PsbA) reaction center heterodimer binds P680, the primary electron donor of PSII as well as several subsequent electron acceptors.[HAMAP-Rule:MF_01379] [CB29_CHLRE] The light-harvesting complex (LHC) functions as a light receptor, it captures and delivers excitation energy to photosystems with which it is closely associated. CP29 facilitates the State 1 to State 2 transition, where State I is induced by excess photosystem I (PSI) light and State 2 is induced by excess photosystem II (PSII) light.^[1] [Q93WL4_CHLRE] The light-harvesting complex (LHC) functions as a light receptor, it captures and delivers excitation energy to photosystems with which it is closely associated.[RuleBase:RU363080] [PSBW_CHLRE] Stabilizes dimeric photosystem II (PSII). In its absence there is a reduction of monomeric PSII (By similarity).[UniProtKB:Q39194] [PSBI_CHLRE] One of the components of the core complex of photosystem II (PSII), required for its stability and/or assembly (PubMed:7721898). PSII is a light-driven water:plastoquinone oxidoreductase that uses light energy to abstract electrons from H(2)O, generating O(2) and a proton gradient subsequently used for ATP formation. It consists of a core antenna complex that captures photons, and an electron transfer chain that converts photonic excitation into a charge separation.[HAMAP-Rule:MF_01316]^[2] [PSBD_CHLRE] Photosystem II (PSII) is a light-driven water:plastoquinone oxidoreductase that uses light energy to abstract electrons from H(2)O, generating O(2) and a proton gradient subsequently used for ATP formation. It consists of a core antenna complex that captures photons, and an electron transfer chain that converts photonic excitation into a charge separation. The D1/D2 (PsbA/PsbA) reaction center heterodimer binds P680, the primary electron donor of PSII as well as several subsequent electron acceptors. D2 is needed for assembly of a stable PSII complex.[HAMAP-Rule:MF_01383] [PSBL_CHLRE] One of the components of the core complex of photosystem II (PSII). PSII is a light-driven water:plastoquinone oxidoreductase that uses light energy to abstract electrons from H(2)O, generating O(2) and a proton gradient subsequently used for ATP formation. It consists of a core antenna complex that captures photons, and an electron transfer chain that converts photonic excitation into a charge separation. This subunit is found at the monomer-monomer interface and is required for correct PSII assembly and/or dimerization.[HAMAP-Rule:MF_01317] [PSBT_CHLRE] Seems to play a role in the dimerization of PSII (By similarity). Essential to maintain photosynthetic activity under adverse growth conditions. [PSBC_CHLRE] One of the components of the core complex of photosystem II (PSII). It binds chlorophyll and helps catalyze the primary light-induced photochemical processes of PSII. PSII is a light-driven water:plastoquinone oxidoreductase, using light energy to abstract electrons from H(2)O, generating O(2) and a proton gradient subsequently used for ATP formation.[HAMAP-Rule:MF_01496] [PSBZ_CHLRE] Controls the interaction of photosystem II (PSII) cores with the light-harvesting antenna. [PSBK_CHLRE] One of the components of the core complex of photosystem II (PSII). PSII is a light-driven water:plastoquinone oxidoreductase that uses light energy to abstract electrons from H(2)O, generating O(2) and a proton gradient subsequently used for ATP formation. It consists of a core antenna complex that captures photons, and an electron transfer chain that converts photonic excitation into a charge separation. Required for assembly and/or stability of PSII (PubMed:12939265, PubMed:8193302).[HAMAP-Rule:MF_00441]^{[3] [4]} [PSBF_CHLRE] This b-type cytochrome is tightly associated with the reaction center of photosystem II (PSII). PSII is a light-driven water:plastoquinone oxidoreductase that uses light energy to abstract electrons from H(2)O, generating O(2) and a proton gradient subsequently used for ATP formation. It consists of a core antenna complex that captures photons, and an electron transfer chain that converts photonic excitation into a charge separation.[HAMAP-Rule:MF_00643] [Q9FEK6_CHLRE] The light-harvesting complex (LHC) functions as a light receptor, it captures and delivers excitation energy to photosystems with which it is closely associated.[RuleBase:RU363080] [PSBM_CHLRE] One of the components of the core complex of photosystem II (PSII). PSII is a light-driven water:plastoquinone oxidoreductase that uses light energy to abstract electrons from H(2)O, generating O(2) and a proton gradient subsequently used for ATP formation. It consists of a core antenna complex that captures photons, and an electron transfer chain that converts photonic excitation into a charge separation. This subunit is found at the monomer-monomer interface. [PSBH_CHLRE] One of the components of the core complex of photosystem II (PSII), required for its stability and/or assembly, possibly playing a role in dimerization (PubMed:9112780, PubMed:9554956). PSII is a light-driven water:plastoquinone oxidoreductase that uses light energy to abstract electrons from H(2)O, generating O(2) and a proton gradient subsequently used for ATP formation. It consists of a core antenna complex that captures photons, and an electron transfer chain that converts photonic excitation into a charge separation.[HAMAP-Rule:MF_00752]^{[5] [6]}

References

1. ↑ Kargul J, Turkina MV, Nield J, Benson S, Vener AV, Barber J. Light-harvesting complex II protein CP29 binds to photosystem I of Chlamydomonas reinhardtii under State 2 conditions. FEBS J. 2005 Sep;272(18):4797-806. PMID:16156798 doi:http://dx.doi.org/EJB4894
2. ↑ Kunstner P, Guardiola A, Takahashi Y, Rochaix JD. A mutant strain of Chlamydomonas reinhardtii lacking the chloroplast photosystem II psbI gene grows photoautotrophically. J Biol Chem. 1995 Apr 21;270(16):9651-4. doi: 10.1074/jbc.270.16.9651. PMID:7721898 doi:http://dx.doi.org/10.1074/jbc.270.16.9651
3. ↑ Sugimoto I, Takahashi Y. Evidence that the PsbK polypeptide is associated with the photosystem II core antenna complex CP43. J Biol Chem. 2003 Nov 7;278(45):45004-10. doi: 10.1074/jbc.M307537200. Epub 2003 , Aug 25. PMID:12939265 doi:http://dx.doi.org/10.1074/jbc.M307537200
4. ↑ Takahashi Y, Matsumoto H, Goldschmidt-Clermont M, Rochaix JD. Directed disruption of the Chlamydomonas chloroplast psbK gene destabilizes the photosystem II reaction center complex. Plant Mol Biol. 1994 Mar;24(5):779-88. doi: 10.1007/bf00029859. PMID:8193302 doi:http://dx.doi.org/10.1007/bf00029859
5. ↑ Summer EJ, Schmid VH, Bruns BU, Schmidt GW. Requirement for the H phosphoprotein in photosystem II of Chlamydomonas reinhardtii. Plant Physiol. 1997 Apr;113(4):1359-68. doi: 10.1104/pp.113.4.1359. PMID:9112780 doi:http://dx.doi.org/10.1104/pp.113.4.1359
6. ↑ O'Connor HE, Ruffle SV, Cain AJ, Deak Z, Vass I, Nugent JH, Purton S. The 9-kDa phosphoprotein of photosystem II. Generation and characterisation of Chlamydomonas mutants lacking PSII-H and a site-directed mutant lacking the phosphorylation site. Biochim Biophys Acta. 1998 Apr 14;1364(1):63-72. doi:, 10.1016/s0005-2728(98)00013-9. PMID:9554956 doi:http://dx.doi.org/10.1016/s0005-2728(98)00013-9
7. ↑ Shen L, Huang Z, Chang S, Wang W, Wang J, Kuang T, Han G, Shen JR, Zhang X. Structure of a C2S2M2N2-type PSII-LHCII supercomplex from the green alga Chlamydomonas reinhardtii. Proc Natl Acad Sci U S A. 2019 Oct 15;116(42):21246-21255. doi:, 10.1073/pnas.1912462116. Epub 2019 Sep 30. PMID:31570614 doi:http://dx.doi.org/10.1073/pnas.1912462116