>TIGR01276 thiB thiamin/thiamin pyrophosphate ABC transporter, thiamin/thiamin pyrophospate-binding protein; InterPro: IPR005967 Bacterial high affinity transport systems are involved in active transport of solutes across the cytoplasmic membrane. The protein components of these traffic systems include one or two transmembrane protein components, one or two membrane-associated ATP-binding proteins and a high affinity periplasmic solute-binding protein. In Gram-positive bacteria, which are surrounded by a single membrane and therefore have no periplasmic region, the equivalent proteins are bound to the membrane via an N-terminal lipid anchor. These homologue proteins do not play an integral role in the transport process per se, but probably serve as receptors to trigger or initiate translocation of the solute through the membrane by binding to external sites of the integral membrane proteins of the efflux system. In addition at least some solute-binding proteins function in the initiation of sensory transduction pathways. Thiamine pyrophosphate (TPP) is a required cofactor synthesized de novo in Salmonella typhimurium . The primary role for TPP is in central metabolism as an electron carrier and nucleophile for such enzymes as pyruvate dehydrogenase (1.2.4.1 from EC), acetolactate synthase (4.1.3.18 from EC), and alpha-ketoglutarate dehydrogenase (1.2.4.2 from EC). Despite its importance in cellular physiology, neither the de novo biosynthetic pathway nor the salvage systems for thiamine are fully understood in any organism. The thiamine ABC transporter, periplasmic binding protein in proteobacteria is believed to be involved in the specific translocation of thiamine and its phosphoesters across the inner membrane The protein belongs to the larger ABC transport system which consists of at least three components: the inner membrane permease; thiamine binding protein and an ATP-binding subunit. It has been experimentally demonstrated that mutants in the various steps in the de novo synthesis of thiamine and its biologically active form, namely thiamine pyrophosphate can be exogenously supplemented with thiamine, thiamine monophosphate or thiamine pyrophosphate.; GO: 0005524 ATP binding, 0042626 ATPase activity coupled to transmembrane movement of substances, 0006810 transport, 0030288 outer membrane-bounded periplasmic space.

Probab=99.42  E-value=2e-13  Score=96.34  Aligned_cols=164  Identities=17%  Similarity=0.170  Sum_probs=121.6

Q ss_pred             CCCCCCEEEECCCC---HHHHHH-HHHHHH-HHCCCCCCCCCHHH-----HHHHHHHHCCCCCEEEECCHHHHH--HHHH
Q ss_conf             44588089981899---899999-999999-87598621000013-----566765210666557504223323--4331
Q gi|254780563|r   23 ENTTKYLTLYTDQN---QSVMLP-IIHSFE-ERTGVKISPIYTSS-----IQRPPITQGSPVDVIITKDETSLA--LNED   90 (195)
Q Consensus        23 ~~~~~~lvVYs~~~---~~~~~~-~~~~Fe-k~tgIkV~~~~~~~-----~~~~~~~~~~~~d~~~~~d~~~l~--~~~~   90 (195)
T Consensus        12 ~~A~~~~~VY~YDSF~~~WG~GP~VK~~FEkA~~~C~~~l~~lE~~~~LLNR~RlEGK~~KAD~VLGLDN~lL~~A~KTG   91 (326)
T TIGR01276        12 VFAKQVLTVYSYDSFAADWGAGPKVKKDFEKADPNCELKLVALEDVVVLLNRLRLEGKKSKADVVLGLDNFLLDAAEKTG   91 (326)
T ss_pred             HHCCCEEEEEECCCCCCCCCCCCCCHHHHHCCCCCCCEEEEECCCCEEEEEEEEECCCCCCCCEEECCHHHHHHHHHHCC
T ss_conf             65054016850224332357758421144057876413656413330322122303666543367633056787664166


Q ss_pred             HHCCCCCCCCCCCCCCCCCCCCCCCCCCCCEEEEEEEHHHHCCCCCCCCHHHHCCHHHCCEEEE--CCCCCCHHHHHHHH
Q ss_conf             0000123422234720001222223443450588873344013445578888408667685996--28983049999999
Q gi|254780563|r   91 LLHKLPAHLIKKNSFVLKNENKKLMRISFDTQVLAYSTKRIKIADLPKSVFDLTNAQWKKRLSI--APNNISFHRLLNTM  168 (195)
Q Consensus        91 ~l~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~n~~~~~~~~~P~sw~DL~~p~~kG~i~~--~~~~~s~~~~~~a~  168 (195)
T Consensus        92 ~FA~~~V~~~~~~~P-~~W~N~TF~PFDyG~yAFVYDK~KL~--NPP~SLKELVEs~Q~~~VIYQDPRTS~~G~GLL~WM  168 (326)
T TIGR01276        92 LFAKSNVDLDALDLP-TKWANDTFLPFDYGYYAFVYDKTKLK--NPPKSLKELVESDQDLRVIYQDPRTSSVGLGLLLWM  168 (326)
T ss_pred             CCCCCCCCCEECCCC-CCCCCCCCCCCCCCCEEEEEECCCCC--CCCHHHHHHHCCCCCCEEEEECCCCCCCCCHHHHHH
T ss_conf             435565550000488-77467621564457535787210146--886445765203577268975687686443476655


Q ss_pred             HHHHCHHHHHHHHHHHHHCCC
Q ss_conf             996086999999999860887
Q gi|254780563|r  169 EQTPNKTVVQDFIKNITANEI  189 (195)
Q Consensus       169 ~~~~G~~~~~~~l~~l~~N~~  189 (195)
T Consensus       169 ~~VYP~D~~~~AW~~L~K~TV  189 (326)
T TIGR01276       169 NKVYPADDIQSAWKKLDKKTV  189 (326)
T ss_pred             HHCCCCCCHHHHHHHHCCCEE
T ss_conf             440785544789997446436