Sequence alignment between 4xkb(A) and UniProt seq P72583 (YC53L_SYNY3):

P72583 (YC53L_SYNY3): Ycf53-like protein from Synechocystis sp. (strain ATCC 27184 / PCC 6803 / Kazusa)
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230   
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---
UniProt: MSDNLTELSQQLHDASEKKQLTAIAALAEMGEGGQGILLDYLAKNVPLEKPVLAVGNVYQTLRNLEQETITTQLQRNYPTGIFPLQSAQGIDYLPLQEALGSQDFETADEITRDKLCELAGPGASQRQWLYFTEVEKFPALDLHTINALWWLHSNGNFGFSVQRRLWLASGKEFTKLWPKIGWKSGNVWTRWPKGFTWDLSAPQGHLPLLNQLRGVRVAESLYRHPVWSQYGW
         ............XXXXXX.......................................................................................................................................................................................................................
PDB seq: --DNLTELSQQL------KQLTAIAALAEMGEGGQGILLDYLAKNVPLEKPVLAVGNVYQTLRNLEQETITTQLQRNYPTGIFPLQSAQGIDYLPLQEALGSQDFETADEITRDKLCELAGPGASQRQWLYFTEVEKFPALDLHTINALWWLHSNGNFGFSVQRRLWLASGKEFTKLWPKIGWKSGNVWTRWPKGFTWDLSAPQGHLPLLNQLRGVRVAESLYRHPVWSQYGW
           -------+--      -+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230