HHsearch alignment for GI: 255764486 and conserved domain: TIGR02141

>TIGR02141 modB_ABC molybdate ABC transporter, permease protein; InterPro: IPR011867 ABC transporters belong to the ATP-Binding Cassette (ABC) superfamily, which uses the hydrolysis of ATP to energize diverse biological systems. ABC transporters are minimally constituted of two conserved regions: a highly conserved ATP binding cassette (ABC) and a less conserved transmembrane domain (TMD). These regions can be found on the same protein or on two different ones. Most ABC transporters function as a dimer and therefore are constituted of four domains, two ABC modules and two TMDs. ABC transporters are involved in the export or import of a wide variety of substrates ranging from small ions to macromolecules. The major function of ABC import systems is to provide essential nutrients to bacteria. They are found only in prokaryotes and their four constitutive domains are usually encoded by independent polypeptides (two ABC proteins and two TMD proteins). Prokaryotic importers require additional extracytoplasmic binding proteins (one or more per systems) for function. In contrast, export systems are involved in the extrusion of noxious substances, the export of extracellular toxins and the targeting of membrane components. They are found in all living organisms and in general the TMD is fused to the ABC module in a variety of combinations. Some eukaryotic exporters encode the four domains on the same polypeptide chain . The ABC module (approximately two hundred amino acid residues) is known to bind and hydrolyze ATP, thereby coupling transport to ATP hydrolysis in a large number of biological processes. The cassette is duplicated in several subfamilies. Its primary sequence is highly conserved, displaying a typical phosphate-binding loop: Walker A, and a magnesium binding site: Walker B. Besides these two regions, three other conserved motifs are present in the ABC cassette: the switch region which contains a histidine loop, postulated to polarize the attaching water molecule for hydrolysis, the signature conserved motif (LSGGQ) specific to the ABC transporter, and the Q-motif (between Walker A and the signature), which interacts with the gamma phosphate through a water bond. The Walker A, Walker B, Q-loop and switch region form the nucleotide binding site , , . The 3D structure of a monomeric ABC module adopts a stubby L-shape with two distinct arms. ArmI (mainly beta-strand) contains Walker A and Walker B. The important residues for ATP hydrolysis and/or binding are located in the P-loop. The ATP-binding pocket is located at the extremity of armI. The perpendicular armII contains mostly the alpha helical subdomain with the signature motif. It only seems to be required for structural integrity of the ABC module. ArmII is in direct contact with the TMD. The hinge between armI and armII contains both the histidine loop and the Q-loop, making contact with the gamma phosphate of the ATP molecule. ATP hydrolysis leads to a conformational change that could facilitate ADP release. In the dimer the two ABC cassettes contact each other through hydrophobic interactions at the antiparallel beta-sheet of armI by a two-fold axis , , , , , . Proteins known to belong to this family are classified in several functional subfamilies depending on the substrate used (for further information see http://www.tcdb.org/tcdb/index.php?tc=3.A.1). This entry describes the permease protein, ModB, of the molybdate ABC transporter. This system has been characterised in Escherichia coli , Staphylococcus carnosus Rhodobacter capsulatus and Azotobacter vinlandii . Molybdate is chemically similar to sulphate, thiosulphate, and selenate. These related substrates, and sometimes molybdate itself, can be transported by the homologous sulphate receptor. Some apparent molybdenum transport operons include a permease related to this ModB, although less similar than some sulphate permease proteins and not included in this model.; GO: 0015098 molybdate ion transmembrane transporter activity, 0015689 molybdate ion transport, 0016021 integral to membrane.
Probab=99.95  E-value=3e-26  Score=185.54  Aligned_cols=207  Identities=19%  Similarity=0.288  Sum_probs=166.0

Q ss_pred             HHHHHHHHHHHHHHHHHHHHHHHHHHCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCC
Q ss_conf             99999999999999999999999863305578999999999875448999999999999998753221001323421035
Q gi|255764486|r  260 TFYIGFIAMLFSVPIGLLIAIYMAEYAPKKLRAVIKPITEMLVGIPTIVYGFFALSLVGPFLRDISIYMNGLITGNYKSF  339 (493)
Q Consensus       260 Tl~i~~iA~lia~Pigl~~Aiyl~eya~~~~~~~~~~~iellagiPSVVyG~f~~~~l~p~~~~~~~~~~~~~~~~~~~~  339 (493)
T Consensus         3 Slk~A~~~Tl~~~~LGi~~A~~La~~-~f~gK~~le~L~~LPLVLPPtV~Gf~LL~~fG~~-----~G~~G~l~~~~~~~   76 (212)
T TIGR02141         3 SLKVAVIATLLLLPLGIPVAWLLARS-RFRGKSLLEALVTLPLVLPPTVLGFYLLLAFGRN-----SGPIGKLLELLGIS   76 (212)
T ss_pred             HHHHHHHHHHHHHHHHHHHHHHHHHH-CCCHHHHHHHHHHCCCCCCCHHHHHHHHHHHCCC-----CCCHHHHHHHHHCC
T ss_conf             99999999999999999999999886-1760454464443266356378999999988035-----74077898865068


Q ss_pred             CCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
Q ss_conf             57530179999999988776899999998621299998876608856899999999830336999999999999875999
Q gi|255764486|r  340 IEAQSVLTAGLVMGIMLIPYVSSLSEDVISSIPRSLRDGSLGLGATRSETMKYVIFPAAFPGIAGAILMTASRTIGETMI  419 (493)
Q Consensus       340 ~~~~s~l~a~l~l~imilP~i~~~~~~al~~vp~~lreaa~aLGat~~~ti~~vvlP~a~~gI~~~~iL~~~RaiGETm~  419 (493)
T Consensus        77 Gl~Ft~~g~vlAs~~VSfPl~v~~~~~a~~~~~~~~~~~ArtLGaS~~~~f~~v~LPL~~pG~l~G~vL~FAR~LGEFGA  156 (212)
T TIGR02141        77 GLVFTFAGAVLASVVVSFPLMVRTIRGAFEAVDPDLEEAARTLGASELRVFLKVTLPLAFPGLLAGAVLSFARALGEFGA  156 (212)
T ss_pred             CHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCHHHHHHHHHHCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
T ss_conf             52466999999999999776899999999862712899998827878998999985732899999999999975021134


Q ss_pred             HHHHHCCCCCCCCCCCCCCCHHHHHHHHHHCCCCCCCCH-HHHHHHHHHHHHHHHHHHHHHHHHHHH
Q ss_conf             999941222578670467112799999985022345754-589999999999999999999999999
Q gi|255764486|r  420 VVLAAGVAARLQFNPFESMTTITVKIMNQLTGDLDFSSP-QTLVAFALGLTLFCITFFLNIYAMYIM  485 (493)
Q Consensus       420 v~m~~G~~~~~~~~~~~~~~tlt~~I~~~~~g~~~~~~~-~~~~~fa~gl~L~~~tl~~N~~a~~i~  485 (493)
T Consensus       157 tlm~aGNIpGk-------T~T~plaIY~~v~------~lg~~~~A~~l~l~ll~~s~~~ll~~~~~~  210 (212)
T TIGR02141       157 TLMFAGNIPGK-------TRTIPLAIYDAVE------SLGDYEAAHLLSLVLLALSLIVLLLVELLN  210 (212)
T ss_pred             HHHHCCCCCCC-------CHHHHHHHHHHHH------CCCCHHHHHHHHHHHHHHHHHHHHHHHHHH
T ss_conf             43100469796-------3017677886770------578867899999999999999999998750