PSII is a complicated complex comprising outer light-harvesting complex (LHCII), core antenna complex (including CP43 and CP47), reactive center complex (RC) and Manganese cluster, and its components are so located and assigned as to ensure the quick and efficient energy and electron transfers.
In 2004, Liu et al (LIU et al., 2004) first reported the X-ray structure of spinach LHCII in icosahedral proteoliposome assembly at 2.72 A resolution, and the chlorophyll (Chl) arrangement of trimeric LHCII is as shown in Fig.
It is generally believed that the core antenna complex CP43 and CP47 receive energy from outer LHCII system and assistant antennas, and then transfer the energy to RC complex to complete the energy transfer.
The LHCII family of polypeptides is closely related to LHCI, performing similar functions in photosystem II to those performed by LHCI in PSI.
Of the LHCII components, CP24, CP26, and CP29 contain the most sequence similarities to the LHCIs (Green and Durnford, 1996) and have molecular weights, 25-30 kDa (Wollman et al., 1999), that roughly correspond to those of the three largest polypeptides identified in our anti-LHCI immunoblots of E.
The most abundant membrane protein in chloroplasts, where photosynthesis occurs, LHCII
binds about half of all chlorophyll, the researchers say.
PSII inactivation by heat may go together with the combination and subsequent dissociation of the LHCII
(Li, Cheng et al., 2009)
Color of illumination during growth affects LHCII
chiral macroaggregates in pea plant leaves.