Sequence alignment between 4wjp(A) and UniProt seq P63165 (SUMO1_HUMAN):

P63165 (SUMO1_HUMAN): Small ubiquitin-related modifier 1 from Homo sapiens
                 10        20        30        40        50        60        70        80        90       100 
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+-
UniProt: MSDQEAKPSTEDLGDKKEGEYIKLKVIGQDSSEIHFKVKMTTHLKKLKESYCQRQGVPMNSLRFLFEGQRIADNHTPKELGMEEEDVIEVYQEQTGGHSTV
         ...................................................X.................................................
PDB seq: ------------------GEYIKLKVIGQDSSEIHFKVKMTTHLKKLKESYAQRQGVPMNSLRFLFEGQRIADNHTPKELGMEEEDVIEVYQEQTGG----
                           -+---------+---------+---------+---------+---------+---------+---------+-------    
                           20        30        40        50        60        70        80        90