Protein
p-hydroxybenzoic acid--AMP ligase FadD22
Organism
Mycobacterium tuberculosis (strain CDC 1551 / Oshkosh)
Function
Catalyzes the adenylation of p-hydroxybenzoic acid (pHBA) to form p-hydroxybenzoic acid-AMP (pHBA-AMP), which is converted directly to p-hydroxybenzoyl-S-FadD22 (pHBA-S-FAdD22) thioester intermediate in a CoA-independent manner by attack of the phosphopantetheine thiol of FadD22. Usually, this intermediate primes the biosynthesis of the phenolphthiocerol (PPOL) by presenting the pHBA starter unit for elongation by Pks15/1, but M.tuberculosis lacks Pks15/1 due to a natural frameshift and thus is unable to produce PPOL.
Similarity
Belongs to the ATP-dependent AMP-binding enzyme family.
Sequence
MRNGNLAGLLAEQASEAGWYDRPAFYAADVVTHGQIHDGAARLGEVLRNRGLSSGDRVLLCLPDSPDLVQLLLACLARGVMAFLANPELHRDDHALAARNTEPALVVTSDALRDRFQPSRVAEAAELMSEAARVAPGGYEPMGGDALAYATYTSGTTGPPKAAIHRHADPLTFVDAMCRKALRLTPEDTGLCSARMYFAYGLGNSVWFPLATGGSAVINSAPVTPEAAAILSARFGPSVLYGVPNFFARVIDSCSPDSFRSLRCVVSAGEALELGLAERLMEFFGGIPILDGIGSTEVGQTFVSNRVDEWRLGTLGRVLPPYEIRVVAPDGTTAGPGVEGDLWVRGPAIAKGYWNRPDSPVANEGWLDTRDRVCIDSDGWVTYRCRADDTEVIGGVNVDPREVERLIIEDEAVAEAAVVAVRESTGASTLQAFLVATSGATIDGSVMRDLHRGLLNRLSAFKVPHRFAVVDRLPRTPNGKLVRGALRKQSPTKPIWELSLTEPGSGVRAQRDDLSASNMTIAGGNDGGATLRERLVALRQERQRLVVDAVCAEAAKMLGEPDPWSVDQDLAFSELGFDSQMTVTLCKRLAAVTGLRLPETVGWDYGSISGLAQYLEAELAGGHGRLKSAGPVNSGATGLWAIEEQLNKVEELVAVIADGEKQRVADRLRALLGTIAGSEAGLGKLIQAASTPDEIFQLIDSELGK