>TIGR02673 FtsE cell division ATP-binding protein FtsE; InterPro: IPR005286 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). FtsE is an ABC transporter ATP-binding protein. This protein and its permease partner FtsX, localize to the cell division site. In a number of species, the ftsEX gene pair is located next to ftsY, which encodes the signal recognition particle-docki ng protein.; GO: 0005524 ATP binding, 0051301 cell division.

Probab=96.17  E-value=0.0048  Score=37.93  Aligned_cols=79  Identities=20%  Similarity=0.242  Sum_probs=49.2

Q ss_pred             CCEEEEEEECCCCCHHHHHHHHHHHHCCCCC-CCCCHHHHHHCCCCCCCCCCHHHHHHCCCEEEEEECC----CCCCCCC
Q ss_conf             3379999707886257899999997233000-3442676420124555568988997389809999346----7776013
Q gi|254781225|r  500 AQRFIHIRGVGGSGKSTLMNLIKYAFGNQYV-INAEASDIMQNRPPEAGKANPSLIRLMGSRIVIISET----NENDEIN  574 (789)
Q Consensus       500 ~~~~~~~~G~G~nGKSt~~~~l~~llG~~~~-~~~~~~~~~~~~~~~~~~~~~~la~l~g~r~~~~~E~----~~~~~~~  574 (789)
T Consensus        27 kG~F~FLtG~SGAGKttLLKLl~~~~~P~~G~v~~~G~~~~~l-------~~~~~P~LRR~iGvvFQDf~LL~~rTv~eN   99 (215)
T TIGR02673        27 KGEFLFLTGPSGAGKTTLLKLLYGALTPSRGQVRVAGEDVSRL-------RGRQLPLLRRRIGVVFQDFRLLPDRTVYEN   99 (215)
T ss_pred             CCCEEEEECCCCCCHHHHHHHHHHHCCCCCCEEEECCEECCCC-------CCCCCHHHHCCCCEEEECCCCCCCCCHHHH
T ss_conf             7740788727786178999999852698758088887404667-------756431221315437842211011661341


Q ss_pred             CCEEEEEECCC
Q ss_conf             10024541598
Q gi|254781225|r  575 AAKIKQMTGGD  585 (789)
Q Consensus       575 ~~~~K~ltggD  585 (789)
T Consensus       100 VAl~L~V~G~~  110 (215)
T TIGR02673       100 VALPLEVRGKK  110 (215)
T ss_pred             CCHHHHCCCCC
T ss_conf             12101113888