Sequence alignment between 1sd6(A) and UniProt seq P68262 (MECI_STAAU):

P68262 (MECI_STAAU): Methicillin resistance regulatory protein MecI from Staphylococcus aureus
                 10        20        30        40        50        60        70        80        90       100       110       120   
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---
UniProt: MDNKTYEISSAEWEVMNIIWMKKYASANNIIEEIQMQKDWSPKTIRTLITRLYKKGFIDRKKDNKIFQYYSLVEESDIKYKTSKNFINKVYKGGFNSLVLNFVEKEDLSQDEIEELRNILNKK
         ..........................................................................................................X................
PDB seq: ----TYEISSAEWEVMNIIWMKKYASANNIIEEIQMQKDWSPKTIRTLITRLYKKGFIDRKKDNKIFQYYSLVEESDIKYKTSKNFINKVYKGGFNSLVLNFVEKEELSQDEIEELRNILNKK
             -----+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---
                 10        20        30        40        50        60        70        80        90       100       110       120