Sequence alignment between 2j4l(H) and UniProt seq Q97ZE2 (PYRH_SULSO):

Q97ZE2 (PYRH_SULSO): Uridylate kinase from Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2)
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+-------
UniProt: MMNIILKISGKFFDEDNVDNLIVLRQSIKELADNGFRVGIVTGGGSTARRYIKLAREIGIGEAYLDLLGIWASRLNAYLVMFSLQDLAYMHVPQSLEEFIQDWSHGKVVVTGGFQPGQSTAAVAALVAEASSSKTLVVATNVDGVYEKDPRIYADVKLIPHLTTQDLRKILEGSQSVQAGTYELLDPLAIKIVERSKIRVIVMNYRKLNRIIDILKGEEVSSIIEPV
         ...............XXXXXXXXXXXXXXXXXXXXXX............................................................................................................XXXXXXXXXXXXX....XXXXXXXXXXXXXXXXXXXX.............................................
PDB seq: -MNIILKISGKFFDE----------------------VGIVTGGGSTARRYIKLAREIGIGEAYLDLLGIWASRLNAYLVMFSLQDLAYMHVPQSLEEFIQDWSHGKVVVTGGFQPGQSTAAVAALVAEASSSKTLVVATNVDGV-------------IPHL--------------------ELLDPLAIKIVERSKIRVIVMNYRKLNRIIDILKGEEVSSIIEPV
          ---------+----                      ---+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+----             --+-                    --------+---------+---------+---------+------
                  10                            40        50        60        70        80        90       100       110       120       130       140                 160                           190       200       210       220