>TIGR01040 V-ATPase_V1_B V-type ATPase, B subunit; InterPro: IPR005723 ATPases (or ATP synthases) are membrane-bound enzyme complexes/ion transporters that combine ATP synthesis and/or hydrolysis with the transport of protons across a membrane. ATPases can harness the energy from a proton gradient, using the flux of ions across the membrane via the ATPase proton channel to drive the synthesis of ATP. Some ATPases work in reverse, using the energy from the hydrolysis of ATP to create a proton gradient. There are different types of ATPases, which can differ in function (ATP synthesis and/or hydrolysis), structure (F-, V- and A-ATPases contain rotary motors) and in the type of ions they transport , . F-ATPases (F1F0-ATPases) in mitochondria, chloroplasts and bacterial plasma membranes are the prime producers of ATP, using the proton gradient generated by oxidative phosphorylation (mitochondria) or photosynthesis (chloroplasts). V-ATPases (V1V0-ATPases) are primarily found in eukaryotic vacuoles, catalysing ATP hydrolysis to transport solutes and lower pH in organelles. A-ATPases (A1A0-ATPases) are found in Archaea and function like F-ATPases. P-ATPases (E1E2-ATPases) are found in bacteria and in eukaryotic plasma membranes and organelles, and function to transport a variety of different ions across membranes. E-ATPases are cell-surface enzymes that hydrolyse a range of NTPs, including extracellular ATP. V-ATPases (also known as V1V0-ATPase or vacuolar ATPase) (3.6.3.14 from EC) are found in the eukaryotic endomembrane system, and in the plasma membrane of prokaryotes and certain specialised eukaryotic cells. V-ATPases hydrolyse ATP to drive a proton pump, and are involved in a variety of vital intra- and inter-cellular processes such as receptor mediated endocytosis, protein trafficking, active transport of metabolites, homeostasis and neurotransmitter release . V-ATPases are composed of two linked complexes: the V1 complex (subunits A-H) contains the catalytic core that hydrolyses ATP, while the V0 complex (subunits a, c, c, c d) forms the membrane-spanning pore. V-ATPases may have an additional role in membrane fusion through binding to t-SNARE proteins . This entry represents subunit B from the V1 complex of V-ATPases. There are three copies each of subunits A (IPR005725 from INTERPRO) and B, both of which participate in nucleotide binding. However, only subunit A is catalytic for ATP hydrolysis, subunit B being noncatalytic , . More information about this protein can be found at Protein of the Month: ATP Synthases .; GO: 0008553 hydrogen-exporting ATPase activity phosphorylative mechanism, 0015988 energy coupled proton transport against electrochemical gradient, 0005737 cytoplasm.

Probab=100.00 E-value=0 Score=435.48 Aligned_cols=417 Identities=24% Similarity=0.344 Sum_probs=361.8 Q ss_pred CEEEEEEECCEEEEEECCCCCCCCCEEE-EC-CCCCEEEEEEEEEECCCEEEEEECCCCCCCCC-CCEEEECCCEEEEEC Q ss_conf 1389999557899981666523141899-81-69955999999870898799998148788878-888897798489885 Q gi|254780615|r 10 VGRIQQIMGAVVDVVFVNSLPPIFSSLE-TS-DKGSRIVFEVVQHLGEKTVRCIAMSRTDGLSR-GDCVIDTGTQITVPV 86 (478) Q Consensus 10 ~GrV~~V~G~vvev~g~~~~~~i~~~i~-~~-~~g~~i~~EVV~~l~e~~V~~i~l~~t~GI~~-G~~V~~tg~~l~VpV 86 (478) T Consensus 2 y~~~~~v~GPlv~l~~v~~--~~~~eiv~~~l~~g~~r~Gqvle~~~~~-a~vqvfeGt~G~d~~~~~~~~~G~~l~~~~ 78 (464) T TIGR01040 2 YKTVSGVNGPLVILENVKF--PKFAEIVNLTLPDGTVRKGQVLEVSGEK-AVVQVFEGTSGIDAKKTTVEFTGDILRLPV 78 (464) T ss_pred CCEECCCCCCEEEEHHCCC--CCCEEEEEEEECCCCCCCCEEEEEECCC-EEEEEECCCCCCCCCCCEEEECCHHHHHHH T ss_conf 6200004664423001055--1200046676167861233057760772-089982476441222314554210231122 Q ss_pred CHHHHHHHHHHHHHHCCCCCCCCCHHHHCCCCCCCCCHHHCCCCCCCCCCCCCCCCCCCCCCCCCEECCCCCCCCHHHHH Q ss_conf 92376558878752301678753001100234544410000134200023110023557021541003675666624899 Q gi|254780615|r 87 GEATLGRIMNVIGEPVDDQGAIISSEKRAIHQPSPSYTEQSTDASILTTGIKVIDLISPYQKGGKIGLFGGAGVGKTVLI 166 (478) Q Consensus 87 G~~lLGRViD~lG~PLDg~g~i~~~~~~pi~~~~p~~~~R~~i~e~L~TGIkaID~l~pig~Gqr~gIfgg~GvGKT~l~ 166 (478) T Consensus 79 s~~mlGr~f~GsG~~id~gP~~l~~~y~d~~G~~inP~~r~yP~em~~tG~s~id~~~si~rGqkiP~fsa~GlPhne~a 158 (464) T TIGR01040 79 SEDMLGRVFNGSGKPIDKGPKVLAEDYLDINGQPINPQARIYPEEMIQTGISAIDVMNSIARGQKIPLFSAAGLPHNEIA 158 (464) T ss_pred HHHHHHHHCCCCCCCCCCCCCCCHHHHHCCCCCCCCCCCCCCHHHHHHHCCHHHHHHHHHHCCCCCCEEECCCCCHHHHH T ss_conf 04531011036775223565310354411478645862114738898502025665666543653312304788635678 Q ss_pred HHHHHHHHH---------CCCCCEEEEEECCCHHHHHHHHHHHHHCCCCCCCCCCCCCCCCCEEEEEEECCCCCHHHHHH Q ss_conf 999998850---------57885268762164345999999854244200122234443323169997176689678777 Q gi|254780615|r 167 MELINNVAK---------AHGGYSVFAGVGERTREGNDLYHEMIDSKVNIDPRKNNGSAVGSKCSLLYGQMNEPPGARSR 237 (478) Q Consensus 167 ~~~i~n~~~---------~~~~v~V~~~iGER~rEv~e~~~e~~~~~~~~~~~~~~~~~~~~~tv~v~~~~~~~~~~r~~ 237 (478) T Consensus 159 aqi~rq~~lv~~~~~~~~~~~f~~vf~amGvn~e~a~ff~~df~------------~~G~~~~~~lflnlandPt~eri~ 226 (464) T TIGR01040 159 AQICRQAGLVKKDVKDGHEDNFAIVFAAMGVNLETARFFKQDFE------------ENGSMERVTLFLNLANDPTIERII 226 (464) T ss_pred HHHHHHHHHHHHHHHHCCCCCEEEEEEHHCCHHHHHHHHHHHHH------------HCCCHHHEEEEEEECCCCCCHHHH T ss_conf 88888778888876402234315652001010578899988675------------347710135665414785301220 Q ss_pred HHHHHHHHHHHHHH-CCCCEEEEEECHHHHHHHHHHHHHHHCCCCHHHHCCHHHHHHHHHHHHHHCCCC--CCCEEEEEE Q ss_conf 77778776899986-699679997155999876012455311441011012235666578887631777--653256665 Q gi|254780615|r 238 VALTGLTVAEHFRD-QGQDVLFFVDNIFRFTQANSEISALLGRIPSAVGYQSTLALEMGELQERITTTL--KGSITSVQA 314 (478) Q Consensus 238 ~~~~a~tiAEyfrd-~g~dVll~~Dsltr~a~A~rEisl~~g~~P~~~gYp~~~f~~~~~l~ERag~~~--~GSIT~~~t 314 (478) T Consensus 227 tPr~al~~ae~lay~~~~hvl~iltd~ssya~alrevsaareevPgrrG~PGymy~dl~~iyeraGrv~Gr~Gsitq~Pi 306 (464) T TIGR01040 227 TPRLALTTAEYLAYECEKHVLVILTDMSSYADALREVSAAREEVPGRRGYPGYMYTDLATIYERAGRVEGRNGSITQIPI 306 (464) T ss_pred CHHHHHHHHHHHHHHCCCEEEEEEECHHHHHHHHHHHHHHHHCCCCCCCCCCHHHHHHHHHHHHCCCCCCCCCCEEEEEE T ss_conf 00367777877765247607998503357999998776555406777888732577789987630421167664242002 Q ss_pred EEECCCCCCCHHHHHHHHHCCCEEEEEHHHHHCCCCCCCCCCCCCCCCCCCEE----CCHHHHHHHHHHHHHHHHHHHHH Q ss_conf 43047664410589999750342564115663188675322355431116201----28999999999999999899899 Q gi|254780615|r 315 IYVPADDLTDPAPATSFTHLDATTVLSRQISEKGIYPAIDPLDSNSSMLEIDI----VGQEHYDVARRVQEILQRYKSLQ 390 (478) Q Consensus 315 V~~~~dD~~dpi~~~~~si~Dg~ivLsr~la~~g~~PAId~~~S~Sr~~~~~i----~~~~h~~~a~~~r~~l~~y~el~ 390 (478) T Consensus 307 ltmPnddithPiPdltGyitegqiy~dr~l~~~~iyPPi~vlPslsrlmk~aiG~gmtr~dh~~vs~qly~~~~~~~d~~ 386 (464) T TIGR01040 307 LTMPNDDITHPIPDLTGYITEGQIYVDRQLHNRQIYPPINVLPSLSRLMKSAIGEGMTRKDHSDVSNQLYAKYAIGKDVA 386 (464) T ss_pred EECCCCCCCCCCCCCCCEEECCEEEEEHHHHHCCCCCCHHHHHHHHHHHHHHHCCCCCHHHHHHHHHHHHHHHHHHHHHH T ss_conf 42576445677653211022242455101430557883235566899988752353101247889999998888887899 Q ss_pred HHHHHHCCCCCCHHHHHHHHHHHHHH-HHHCCCCCEEECCCCCCCEEECHHHHHHHHHHHHC Q ss_conf 99997365569988999999999999-98349971100005789736159999999999976 Q gi|254780615|r 391 DIIAILGMDELSEEDKLVVARARKLE-RFMSQPFHVAESFTGLPGKFVSLEETIRGFKGLVQ 451 (478) Q Consensus 391 ~~i~~~g~~~l~~~~~~~i~r~~~i~-~fL~Qp~~~~e~ft~~~g~~v~~~eti~~~~~il~ 451 (478) T Consensus 387 amkavvG~eal~~~d~l~l~f~~~fe~~f~~qg~y~~r----------~~~~~ld~~W~llr 438 (464) T TIGR01040 387 AMKAVVGEEALSSEDLLYLEFLEKFEKKFIAQGAYENR----------TIFESLDLAWELLR 438 (464) T ss_pred HHHHHHHHHHCCCCCHHHHHHHHHHHHHHHHCCCCCHH----------HHHHHHHHHHHHHH T ss_conf 99887402221413112457888998877512652102----------68988988899999

HHsearch alignment for GI: 254780615 and conserved domain: TIGR01040