Catalyzes the synthesis of the hydroxymethylpyrimidine phosphate (HMP-P) moiety of thiamine from aminoimidazole ribotide (AIR) in a radical S-adenosyl-L-methionine (SAM)-dependent reaction (By similarity). Phosphomethylpyrimidine synthase Condenses 4-methyl-5-(beta-hydroxyethyl)thiazole monophosphate (THZ-P) and 4-amino-5-hydroxymethyl pyrimidine pyrophosphate (HMP-PP) to form thiamine monophosphate (TMP) (By similarity). Hydroxymethylpyrimidine phosphate synthase Thiamine-phosphate pyrophosphorylase MSNEYPYASMRDSFDLSAYFVVGPEDCKGRPLTDVVDQALHGGATFIQLRAKEADASELTDMARDIAQIIEDNEKSDSVAFVIDDRADVVWQARRKGIKVDGVHIGQTDMEPREARALLGDEAIVGLSAETESLVRLINELPDGCIDYIGAGPLHVSTTKPEASVGGNDGSGKTLDAAQINTICVASEFPVVVGGGVTAADMAMLADTKAAGWFVVSAIAGAENPEEAARTMVEGWKAVRGDKKHGYAPRVVTHTPATDTQAAQEGAAKPGSEATEKKFTNAKDAKDAQKLAKQQRVDIAARGSKQRDKAHIRKTKSVPFTYQYGSYDLEVPYTEIKLSDTPGVGPNPPFHDYNTEGPKCDPKEGLKPLRLDWIRDRGDIEDYEGRRRNLEDDGKRAIKRGRATKEWRGRKHEPMRAKDHPITQMWYARHGIITPEMQYVATRENCDVELVRSELAAGRAVMPCNINHPEAEPMIIGSAFLTKLNANMGNSAVTSSIDEEVEKLTWATKWGADTVMDLSTGNDIHTTREWILRNSPVPIGTVPMYQALEKVEDDASKLSWELFRDTVIEQCEQGVDYMTIHAGVLLRYVPLTANRVTGIVSRGGSIMADWCLRHHQESFLYTHFDELCDIFAKYDVAFSLGDGLRPGSLADANDAAQLSELMTLGELTERAWAKDVQVMIEGPGHVPFDTVRMNIELEKAVCHNAPFYTLGPLTTDTAPGYDHITSAIGATEIGRYGTAMLCYVTPKEHLGLPNKDDVKQGVIAYKIACHAADIAKHHPHAMDRDNAISKARFEFRWLDQFNLSYDPDTAIAFHDDTLPAEPAKMAHFCSMCGPKFCSMAISQNIRKAFGGEAAQQQIVKEAAAGIDSEALATAKANVDNGVVSANVLSPEEILAGMDAMSEKYTAQGGKLYSTAQE Thiamine biosynthesis protein thiC 917 thiE/thiC Thiamine-phosphate synthase Bifunctional protein thiEC BL0114 THIEC_BIFLO