Sequence alignment between 4m5h(A) and UniProt seq P26281 (HPPK_ECOLI):

P26281 (HPPK_ECOLI): 2-amino-4-hydroxy-6-hydroxymethyldihydropteridine pyrophosphokinase from Escherichia coli (strain K12)
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140       150         
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------
UniProt: MTVAYIAIGSNLASPLEQVNAALKALGDIPESHILTVSSFYRTPPLGPQDQPDYLNAAVALETSLAPEELLNHTQRIELQQGRVRKAERWGPRTLDLDIMLFGNEVINTERLTVPHYDMKNRGFMLWPLFEIAPELVFPDGEMLRQILHTRAFDKLNKW
PDB seq: MTVAYIAIGSNLASPLEQVNAALKALGDIPESHILTVSSFYRTPPLGPQDQPDYLNAAVALETSLAPEELLNHTQRIELQQGRVRKAERWGPRTLDLDIMLFGNEVINTERLTVPHYDMKNRGFMLWPLFEIAPELVFPDGEMLRQILHTRAFDKLNKW
         ----------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+--------
                  10        20        30        40        50        60        70        80        90       100       110       120       130       140       150