>tr|Q7PB33|Q7PB33_RICS2 Phosphoribosylaminoimidazole-succinocarboxamide synthase OS=Rickettsia sibirica GN=purC MKKKLYEGSSKILYSAEEDFLLIMAFSDKAILETGEIVDISGKGVLNNNISSFLMDKLEM IGIENHFIEKINMREQLIQYVEVFPIQVIISSVACSRFVKEFGIDEGYVFDKPIIDFKVR SREFKYPIVNEYQILNFGWLTRDEIKAVKEQALRIYDFLSGLFIGVGIRLVECKLEFGRV FNGEESIIMLTDEISPDNCRLWHINSNEKLGFELLEKEPNKVFESYQLIADRLKEK