Sequence alignment between 1zrs(A) and UniProt seq Q9HTZ1 (LDC_PSEAE):

Q9HTZ1 (LDC_PSEAE): Murein tetrapeptide carboxypeptidase from Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+-------
UniProt: MTSRPSSDQTWQPIDGRVALIAPASAIATDVLEATLRQLEVHGVDYHLGRHVEARYRYLAGTVEQRLEDLHNAFDMPDITAVWCLRGGYGCGQLLPGLDWGRLQAASPRPLIGFSDISVLLSAFHRHGLPAIHGPVATGLGLSPLSAPREQQERLASLASVSRLLAGIDHELPVQHLGGHKQRVEGALIGGNLTALACMAGTLGGLHAPAGSILVLEDVGEPYYRLERSLWQLLESIDARQLGAICLGSFTDCPRKEVAHSLERIFGEYAAAIEVPLYHHLPSGHGAQNRAWPYGKTAVLEGNRLRW
         .............................X.........................................................................X......................................XXXXXXXXX............................................................................................................................................................
PDB seq: ----PSSDQTWQPIDGRVALIAPASAIATEVLEATLRQLEVHGVDYHLGRHVEARYRYLAGTVEQRLEDLHNAFDMPDITAVWCLRGGYGCGQLLPGLDWGRLEAASPRPLIGFSDISVLLSAFHRHGLPAIHGPVATGLGL---------QERLASLASVSRLLAGIDHELPVQHLGGHKQRVEGALIGGNLTALACMAGTLGGLHAPAGSILVLEDVGEPYYRLERSLWQLLESIDARQLGAICLGSFTDCPRKEVAHSLERIFGEYAAAIEVPLYHHLPSGHGAQNRAWPYGKTAVLEGNRLRW
             -----+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+--         --------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+-------
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140                 160       170       180       190       200       210       220       230       240       250       260       270       280       290       300