Sequence alignment between 3a4l(A) and UniProt seq Q58933 (PSTK_METJA):

Q58933 (PSTK_METJA): L-seryl-tRNA(Sec) kinase from Methanocaldococcus jannaschii (strain ATCC 43067 / DSM 2661 / JAL-1 / JCM 10045 / NBRC 100440) 
                   10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240        
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+--------
UniProt: --MLIILTGLPGVGKSTFSKNLAKILSKNNIDVIVLGSDLIRESFPVWKEKYEEFIKKSTYRLIDSALKNYWVIVDDTNYYNSMRRDLINIAKKYNKNYAIIYLKASLDVLIRRNIERGEKIPNEVIKKMYEKFDEPGKKYKWDEPFLIIDTTKDIDFNEIAKKLIEKSKEIPKFYVLEENKNKNNNISDKIDKETRKIVSEYIKSKKLDKDKIKEVVELRKEFLKKIKKMEEVDADRVLKEFKDLLNSY
         ...............................................................................................................................................................................XXXXXXXXXXX............................................XXX.................
PDB seq: DIMLIILTGLPGVGKSTFSKNLAKILSKNNIDVIVLGSDLIRESFPVWKEKYEEFIKKSTYRLIDSALKNYWVIVDDTNYYNSMRRDLINIAKKYNKNYAIIYLKASLDVLIRRNIERGEKIPNEVIKKMYEKFDEPGKKYKWDEPFLIIDTTKDIDFNEIAKKLIEKSKEIPKF-----------NISDKIDKETRKIVSEYIKSKKLDKDKIKEVVELRKEFLKKIKK---VDADRVLKEFKDLLNSY
         -------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+-------           -+---------+---------+---------+---------+--   ----+---------+--
               10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170                 190       200       210       220       230       240       250