Sequence alignment between 1s4u(X) and UniProt seq Q02793 (SKI8_YEAST):

Q02793 (SKI8_YEAST): Antiviral protein SKI8 from Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
                 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       310       320       330       340       350       360       370       380       390       
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+-------
UniProt: MSKVFIATANAGKAHDADIFSVSACNSFTVSCSGDGYLKVWDNKLLDNENPKDKSYSHFVHKSGLHHVDVLQAIERDAFELCLVATTSFSGDLLFYRITREDETKKVIFEKLDLLDSDMKKHSFWALKWGASNDRLLSHRLVATDVKGTTYIWKFHPFADESNSLTLNWSPTLELQGTVESPMTPSQFATSVDISERGLIATGFNNGTVQISELSTLRPLYNFESQHSMINNSNSIRSVKFSPQGSLLAIAHDSNSFGCITLYETEFGERIGSLSVPTHSSQASLGEFAHSSWVMSLSFNDSGETLCSAGWDGKLRFWDVKTKERITTLNMHCDDIEIEEDILAVDEHGDSLAEPGVFDVKFLKKGWRSGMGADLNESLCCVCLDRSIRWFREAGGK
         ....................................................................................................XXXX............................XXXX........................................................................................XXXXXXXXX...........................................XXXXXXXXXXX..................................................................................XXXXXX......................
PDB seq: --KVFIATANAGKAHDADIFSVSACNSFTVSCSGDGYLKVWDNKLLDNENPKDKSYSHFVHKSGLHHVDVLQAIERDAFELCLVATTSFSGDLLFYRITR----KKVIFEKLDLLDSDMKKHSFWALKWGAS----LSHRLVATDVKGTTYIWKFHPFADESNSLTLNWSPTLELQGTVESPMTPSQFATSVDISERGLIATGFNNGTVQISELSTLRPLYNFE---------NSIRSVKFSPQGSLLAIAHDSNSFGCITLYETEFGERIGSLSV-----------FAHSSWVMSLSFNDSGETLCSAGWDGKLRFWDVKTKERITTLNMHCDDIEIEEDILAVDEHGDSLAEPGVFDVKFLKKGWRS------NESLCCVCLDRSIRWFR-----
           -------+---------+---------+---------+---------+---------+---------+---------+---------+---------+    -----+---------+---------+--    ---+---------+---------+---------+---------+---------+---------+---------+---------+----         ------+---------+---------+---------+------           --+---------+---------+---------+---------+---------+---------+---------+---------      ----+---------+--     
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220                 240       250       260       270                 290       300       310       320       330       340       350       360                 380       390