AUTHOR=Chang Weidong , Li Chenggang , Cui Zheng , Li Wei , Song Haifeng , Chang Han , Fu Weihan , Wang Chunyu , Huang Ting , Luo Yixin , Shan Yelin , Wang Yuhua , Wang Fei , Xu Min , Fu Aigen TITLE=Diverged Early From CtpB and CtpC, CtpA Has Evolved to Process D1 Precursor in Oxygenic Photosynthetic Organisms JOURNAL=Frontiers in Plant Science VOLUME=12 YEAR=2021 URL=https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2021.676036 DOI=10.3389/fpls.2021.676036 ISSN=1664-462X ABSTRACT=
C-terminal peptidase (Ctp) cleaves the C-terminal extension of the D1 precursor (pD1) to form mature D1. Among the three homologs CtpA, CtpB, and CtpC in photosynthetic organisms only the first is capable of processing pD1 while the roles of CtpB and CtpC remain elusive. Phylogenetic analysis of Ctps from photosynthetic organisms revealed that CtpA has diverged early from CtpB and CtpC during evolution implying distinct roles for the Ctps. Analysis of Arabidopsis Ctp-deficient mutants revealed that pD1 processing was not affected in