Cryo-EM structure of IrtAB in inward-facing state in nanodisc

PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER
ATP-GAMMA-S; ADENOSINE 5'-(3-THIOTRIPHOSPHATE); ADENOSINE 5'-(GAMMA-THIOTRIPHOSPHATE); ADENOSINE-5'-DIPHOSPHATE MONOTHIOPHOSPHATE

The mycobacterial ABC transporter IrtAB employs a membrane-facing crevice for siderophore-mediated iron uptake.

wild-type IrtAB in nanodisc with ATP-gamma-S substrate in presence of 100uM MBT (unobserved)

Mycolicibacterium thermoresistibile ATCC 19527

micrographs were collected in super-resolution mode, 38 frames per movie

Sample was pre-incubated with 5mM ATP-gamma-S, 5mM Mg2+ ions and SybNL5 sybody prior plunge-freezing.

Mycobactin import ATP-binding/permease protein IrtA

contains cleaved, C-terminal 3C enzyme recognition site
Mycobactin import ATP-binding/permease protein IrtB

MSLRGLGARDHQATVVDKEYIAPHFVRVRLVSPTLFDEVIVEPTSWLRFWFPDPDGSDTEFQRAYTITESDPETGRFAVD
MVLHEPAGPASTWARTVEPGATIAVMSMGSRGFSVPEDPEDRPVGYLLIGDSASTPAINGIIEVVPHDIPIELYLEQHHD
DDVLIPLAEHPRLRVHRVSRDDASSLAAALELRDWSNWYCWAGPEAGALKQVRTRLRDEFGFPKREVYAQAYWTEGRAMG
SSRGETSTPAKPAAKTAPAKAAAKPAAASGAGTPEHAAAPAAATTGAPQAAPAPGAAQPRTPVRGRWRAEAGSRLLAPLK
KPLIVSGVLQALITLIELAPFVLLVELARLLLGGAEAERLWTLGLTAVSLIGLGAVLAAAMTLWLHRVDARFAHELRGRL
LTKLSRLPLGWFTRRGSASTKQLVQDDTLALHYLITHAIPDAVAAVVAPVAVLVYLFVADWRVALVLFIPVLVYLVLMSV
MTIQSGSKIAQAPRWAERMGGEAGAFLEGQPVIRIFGGAAASRFRRRLDDYIDFLVSWQRPFVGKKTLMDLVTRPATFLW
IILVAGVPLVVTGRMDPVNLLPFLLLGTTFGARLLGIGYGLSGIQTGMLAARRIQTVLDEPELVVRDRTGQAGTDHASGD
QARPGTVELDRVSFEYRPGVPVIRDVTLTLRPGTVTALVGPSGSGKSTLAALVARFHDVTQGAIRVDGRDIRTLTADELY
RRVGFVLQDAQLVHGSVAENIALAEPDAGLERIRTAARDAQIHDRITRMPDGYDSVLGAGSALSGGERQRVTIARAILAD
TPVLVLDEATAFADPESEYLVQQAINRLTRDRTVLVIAHRLHTITHADQIVVLDDGRIVEVGTHDELLAAGGRYRGLWDS
GRYSSPDAGRPVSADAVEVGR

MIRTLLRLVPAEKRGAVAGYAVLTLLSVLLRAVGAVLLIPLLAALFSDTPSDAWLWLGWLTAVTLAGWVTDTNTARLGFD
LGFAVLSRTQHDMADRLPNVAMSWFTPDNTATARQAIAATGPELAGLVVNLLTPLIGAALLPAAIGVALLFVSVPLGLAA
LAGVAVLFGALALSGRLSRAADKVAGETNSAFTERIIEFARTQQALRAARRVEPARSQVGSALAAQHGAGLRLLTMQIPG
QVLFSLAGQVALIGFAGMAVWLTVRGQLGVPEAIALIVVLVRYLEPFAAIADLAPALETTRATLNRIQAVLDAPTLPAGR
RRLDRTGAAPSIEFDDVRFSYGDEVVLDGVSFTLRPGNTTAIVGPSGSGKTTILSLIAGLQQPASGRVLLDGVDVTTLDP
EARRAAVSVVFQHPYLFDGTLRDNVLVGDPEADPDDVTAAMRLARVDELLDRLPDGDATVVGEGGTALSGGERQRVSIAR
ALLKPAPVLLVDEATSALDNANEAAVVDALTADPRPRTRVIVAHRLASIRHADRVLFVEAGRVVEDGAIDELLAAGGRFA
QFWAQQQAASEWAIGSTARALEVLFQ

ABC transporter, type IV ABC importer siderophore, mycobactin, heterodimeric ABC transporter, MEMBRANE PROTEIN

LRGLGARDHQATVVDKEYIAPHFVRVRLVSPTLFDEVIVEPTSWLRFWFPDPDGSDTEFQRAYTITESDPETGRFAVDMV
LHEPAGPASTWARTVEPGATIAVMSMGSRGFSVPEDPEDRPVGYLLIGDSASTPAINGIIEVVPHDIPIELYLEQHHDDD
VLIPLAEHPRLRVHRVSRDDASSLAAALELRDWSNWYCWAGPEAGALKQVRTRLRDEFGFPKREVYAQAYWTEGRAMGSS
RGETSTPAKPAAKTAPAKAAAKPAAASGAGTPEHAAAPAAATTGAPQAAPAPGAAQPRTPVRGRWRAEAGSRLLAPLKKP
LIVSGVLQALITLIELAPFVLLVELARLLLGGAEAERLWTLGLTAVSLIGLGAVLAAAMTLWLHRVDARFAHELRGRLLT
KLSRLPLGWFTRRGSASTKQLVQDDTLALHYLITHAIPDAVAAVVAPVAVLVYLFVADWRVALVLFIPVLVYLVLMSVMT
IQSGSKIAQAPRWAERMGGEAGAFLEGQPVIRIFGGAAASRFRRRLDDYIDFLVSWQRPFVGKKTLMDLVTRPATFLWII
LVAGVPLVVTGRMDPVNLLPFLLLGTTFGARLLGIGYGLSGIQTGMLAARRIQTVLDEPELVVRDRTGQAGTDHASGDQA
RPGTVELDRVSFEYRPGVPVIRDVTLTLRPGTVTALVGPSGSGKSTLAALVARFHDVTQGAIRVDGRDIRTLTADELYRR
VGFVLQDAQLVHGSVAENIALAEPDAGLERIRTAARDAQIHDRITRMPDGYDSVLGAGSALSGGERQRVTIARAILADTP
VLVLDEATAFADPESEYLVQQAINRLTRDRTVLVIAHRLHTITHADQIVVLDDGRIVEVGTHDELLAAGGRYRGLWDSGR
YSSPDAGRPVSADAVEVGR

MIRTLLRLVPAEKRGAVAGYAVLTLLSVLLRAVGAVLLIPLLAALFSDTPSDAWLWLGWLTAVTLAGWVTDTNTARLGFD
LGFAVLSRTQHDMADRLPNVAMSWFTPDNTATARQAIAATGPELAGLVVNLLTPLIGAALLPAAIGVALLFVSVPLGLAA
LAGVAVLFGALALSGRLSRAADKVAGETNSAFTERIIEFARTQQALRAARRVEPARSQVGSALAAQHGAGLRLLTMQIPG
QVLFSLAGQVALIGFAGMAVWLTVRGQLGVPEAIALIVVLVRYLEPFAAIADLAPALETTRATLNRIQAVLDAPTLPAGR
RRLDRTGAAPSIEFDDVRFSYGDEVVLDGVSFTLRPGNTTAIVGPSGSGKTTILSLIAGLQQPASGRVLLDGVDVTTLDP
EARRAAVSVVFQHPYLFDGTLRDNVLVGDPEADPDDVTAAMRLARVDELLDRLPDGDATVVGEGGTALSGGERQRVSIAR
ALLKPAPVLLVDEATSALDNANEAAVVDALTADPRPRTRVIVAHRLASIRHADRVLFVEAGRVVEDGAIDELLAAGGRFA
QFWAQQQAASEWAIGSTAR