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aknOx

Gene
aknOx
Protein
Aclacinomycin-N/aclacinomycin-A oxidase
Organism
Streptomyces galilaeus
Length
545 amino acids
Function
Involved in the modification of the terminal sugar residues in the last two steps in the biosynthesis of polyketide antibiotics of the aclacinomycin group. In the first reaction, it catalyzes the oxidation of the hydroxyl group at carbon C4 of the L-rhodinose terminal sugar moiety of aclacinomycin N (AclN) to a keto group, modifying the sugar to cinerulose A and generating aclacinomycin A (AclA). In the second reaction, it catalyzes the elimination of two hydrogen atoms from cinerulose A, leading to a double bond between carbon atoms C2 and C3 and the generation of the L-aculose terminal sugar moiety of aclacinomycin Y (AclY). It can also use aclacinomycin analogs, epsilon-pyrromycinone glycosides, rhodirubins (A, B, C and E) and all triglycosides containing L-cinerulose, L-rhodinose or 2-deoxy-L-fucose as terminal sugar.
Similarity
Belongs to the oxygen-dependent FAD-linked oxidoreductase family.
Mass
59.014 kDa
Sequence
MFVLNEFTRRGFLGTAAAVGGTTVVTTALGGAPAAQAAVPEAADGGACGARTALVKVDRVDRRYQDLVTRGFNGRFRGRPDVVYVVHTADQVVDAVNQAMAAGQRIAVRSGGHCFEGFVDDPAVRAVIDMSQMRQVFYDSGKRAFAVEPGATLGETYRALYLDWGVTIPAGVCPQVGVGGHVLGGGYGPLSRRDGVVADHLYAVEVVVVDASGRARKVVATSAADDPNRELWWAHTGGGGGNFGIVTRYWFRTPGATGTDPSQLLPKAPTSTLRHIVTWDWSALTEEAFTRIIDNHGAWHQSNSAAGTPYASMHSVFYLNSRAAGQILLDIQIDGGLDGAEALLNDFVAAVNEGTGVEPAVQRSTEPWLRATLANKFDTGGFDRTKSKGAYLRKPWTAAQAATLYRHLSADSQVWGEVSLYSYGGKVNSVPETATATAQRDSIIKVWMSATWMDPAHDDANLAWIREIYREIFATTGGVPVPDDRTEGTFINYPDVDLVDERWNTSGVPWYTLYYKGNYPRLQKVKARWDPRDVFRHALSVRPPG