>TIGR01185 devC DevC protein; InterPro: IPR005891 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 family contains a predicted membrane subunit, DevC, of an ABC transporter known so far from two species of cyanobacteria. Some experimental data from mutational analysis { suggest that this protein, along with DevA and DevB encoded in the same operon, may be involved in the transport/export of glycolipids.; GO: 0005215 transporter activity, 0006810 transport, 0016020 membrane.

Probab=98.39  E-value=3.1e-06  Score=54.59  Aligned_cols=221  Identities=16%  Similarity=0.234  Sum_probs=126.2

Q ss_pred             HHHHHHHCCCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH----HHCCCCCEEECCCC-CC-----CCH
Q ss_conf             999875225545468999999999999999999999999876999996311----10245300000000-01-----213
Q 537021.9.peg.7   11 VAWRYLFSNRKNAFISIASFISFIGVMIGVMALIVVMSVMNGFREDMIKRV----LGINGHVVIQQKYY-PL-----VDY   80 (270)
Q Consensus        11 iA~R~l~~~k~r~~~~~is~ls~lgI~igv~~li~~lsv~~G~~~~i~~~i----~~~~~~i~i~~~~~-~~-----~~~   80 (270)
T Consensus         3 L~W~QL~~E~~R------L~~A~AGIAFA--D~L~FMQ--~GF~~ALy~S~VR~~~SLQGD~~~l~~Q~~~~~~~~PF~~   72 (381)
T TIGR01185         3 LAWLQLTREKTR------LLVALAGIAFA--DVLIFMQ--LGFKDALYDSAVRLHKSLQGDLVLLSKQSDAVLAMKPFAA   72 (381)
T ss_pred             CHHHHHHHHHHH------HHHHHHHHHHH--HHHHHHH--HHHHHHHHHCCCCCCCCCCCCEEEEECCCCCCCCCCCHHH
T ss_conf             415688888999------99998768999--9999986--3045654311245453345567888335342005896346


Q ss_pred             HHHHHHHHCCCCHHHHHHHHHCCCCCCCC-CCCCCCCCCCCCCCCCCCCCCCHHHHCCCCCCCCCCCCCCCCCHH-----
Q ss_conf             66655542264103466542001111122-233221011124310000012001100277542111123421013-----
Q 537021.9.peg.7   81 QFIANRLDFIPDVIKVLPFVSGQAFVSGL-SSGGSGVLVRGISNSDFSYLQNSFSRFYGNVSNDFDRGKGVIIGK-----  154 (270)
Q Consensus        81 ~~~~~~l~~~~~V~~~~p~i~~~~~i~~~-~~~~~~v~i~Gv~~~~~~~~~~~~~~~~~~~~~~~~~~~~iiiG~-----  154 (270)
T Consensus        73 RRL-Y~~l~~~SV~~~~~~Y~D~~~WKNP~T~~~R~I~~~G~NP~~N~~--NL-~GV~ENLD~-~K~PD~~LFD~~SR~E  147 (381)
T TIGR01185        73 RRL-YKALELASVKDVTSLYLDISIWKNPETKLSRSILVFGINPVTNII--NL-AGVAENLDK-LKLPDVVLFDRDSREE  147 (381)
T ss_pred             HHH-HHHHCCCCCCCCCEEEEECCCCCCCCCCCEEEEEEEEECCCCCCC--CC-CCHHHHHHH-HCCCCEEEECCCCCCC
T ss_conf             789-998368742356327873234548887650378987106765664--56-633443443-1589667730677743


Q ss_pred             --HHHHHHHCCCCCEEEECCCCCCCCCCCCCCCCCCCCCCEEEEEECC-CCCCCEEEEEHHHHHHHCCCC-CCEEEEEEE
Q ss_conf             --4545542133320231134421000122110000122102331024-455516898548899971899-871079999
Q 537021.9.peg.7  155 --DLARNLGISIGDKINILSPYGDVTPMGMGIRSKSYTVLGMFRMRFP-DYDNGMVYMSLQEAQLYFNLE-NAVSGIEVF  230 (270)
Q Consensus       155 --~lA~~L~l~vGD~i~l~~~~~~~~~~~~~~~~~~f~V~GI~~sg~~-~~D~~~v~~~l~~~q~l~~~~-~~~~~i~i~  230 (270)
T Consensus       148 yGP~~~~l--E~~~~~~------------~EV~~RRI~V~GLFTLG~SFGADG~L~TSD~NFlRLFP~R~~~~ID~G~~~  213 (381)
T TIGR01185       148 YGPVAKLL--EADQSVS------------AEVRRRRINVVGLFTLGASFGADGNLVTSDLNFLRLFPLRDRSLIDIGLLR  213 (381)
T ss_pred             CCCCHHHH--CCCCCEE------------EEECCEEEEEEEEEEECCCCCCCCCCHHHHHHHHHCCCCCCCCCCCEEEEE
T ss_conf             47524663--2889466------------623253788887653064415787403432466742777565541034454


Q ss_pred             ECCHHHHHHHHHHHHHHCCC-CEEEEEHHHH
Q ss_conf             56988999999999986199-8599968998
Q 537021.9.peg.7  231 VKDPDAIEKTHENIVRILGN-GVVVIDWQQR  260 (270)
Q Consensus       231 l~d~~~~~~~~~~i~~~l~~-~~~v~~w~e~  260 (270)
T Consensus       214 LKPG~~P~~~~~E~R~~L~~GD~~VlTK~~l  244 (381)
T TIGR01185       214 LKPGVDPEKVVEELRSELTDGDVNVLTKEKL  244 (381)
T ss_pred             CCCCCCHHHHHHHHHHHCCCCCCEEHHHHHH
T ss_conf             0698888899999986468764020205788