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3.A.1.25.5
Biotin/Riboflavin ECF transport system, EcfAA'T/RibU/BioY (Karpowich and Wang 2013). RibU binds riboflavin with high affinity, and the protein-substrate complex is exceptionally stable in solution. The crystal structure of riboflavin-bound RibU reveals an electronegative binding pocket at the extracellular surface in which the substrate is completely buried (Karpowich et al. 2016).

Accession Number:Q9WY65
Protein Name:Putative ABC transporter ATP-binding protein TM_0222
Length:266
Molecular Weight:30233.00
Species:Thermotoga maritima (strain ATCC 43589 / MSB8 / DSM 3109 / JCM 10099) [243274]
Location1 / Topology2 / Orientation3: Cell inner membrane1 / Peripheral membrane protein2
Substrate biotin, riboflavin

Cross database links:

Structure:
2YZ2   4HLU   4ZIR     

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FASTA formatted sequence 
1:	MRIEVVNVSH IFHRGTPLEK KALENVSLVI NEGECLLVAG NTGSGKSTLL QIVAGLIEPT 
61:	SGDVLYDGER KKGYEIRRNI GIAFQYPEDQ FFAERVFDEV AFAVKNFYPD RDPVPLVKKA 
121:	MEFVGLDFDS FKDRVPFFLS GGEKRRVAIA SVIVHEPDIL ILDEPLVGLD REGKTDLLRI 
181:	VEKWKTLGKT VILISHDIET VINHVDRVVV LEKGKKVFDG TRMEFLEKYD PRFFTSKMLV 
241:	MRRLVLKGED PFSMSDDELL ERVCNS