>TIGR00963 secA preprotein translocase, SecA subunit; InterPro: IPR000185 Secretion across the inner membrane in some Gram-negative bacteria occurs via the preprotein translocase pathway. Proteins are produced in the cytoplasm as precursors, and require a chaperone subunit to direct them to the translocase component. . From there, the mature proteins are either targeted to the outer membrane, or remain as periplasmic proteins. The translocase protein subunits are encoded on the bacterial chromosome. The translocase itself comprises 7 proteins, including a chaperone protein (SecB), an ATPase (SecA), an integral membrane complex (SecCY, SecE and SecG), and two additional membrane proteins that promote the release of the mature peptide into the periplasm (SecD and SecF) . The chaperone protein SecB is a highly acidic homotetrameric protein that exists as a "dimer of dimers" in the bacterial cytoplasm. SecB maintains preproteins in an unfolded state after translation, and targets these to the peripheral membrane protein ATPase SecA for secretion . SecA is a cytoplasmic protein of 800 to 960 amino acid residues. Homologs of secA are also encoded in the chloroplast genome of some algae as well as in the nuclear genome of plants . It could be involved in the intraorganellar protein transport into thylakoids.; GO: 0005524 ATP binding, 0006605 protein targeting, 0006886 intracellular protein transport.

Probab=98.80 E-value=1.7e-06 Score=62.78 Aligned_cols=305 Identities=20% Similarity=0.218 Sum_probs=176.7 Q ss_pred CCCCCCCHHHHHHHHHHHCCCCEEEECCCCCCHHHHHHHHHHHHHHCCCCCCCCCCCCEEEEECCCHHHHHHHHHHHHHH Q ss_conf 87987898999999999759969999289874689999999998610421225568827999849989999999999998 Q gi|254780601|r 18 RGYVNLTSVQEAILNPDLREKDVLVSAQTGSGKTVAFGLALASTLLAENDRFSPASAPLALAIAPTRELAVQVGRELEWL 97 (573) Q Consensus 18 ~g~~~pt~iQ~~~ip~~l~g~d~i~~a~TGsGKT~af~lp~l~~l~~~~~~~~~~~~~~~lil~PTrELa~Qv~~~~~~l 97 (573) T Consensus 57 lG-~r~fDVQliGg~~LH~G~--IAEMkTGEGKTL~AtLpaYL--NAL~Gk-------GVHvVTVNdYLA~RD~e~m~~v 124 (904) T TIGR00963 57 LG-LRPFDVQLIGGIVLHKGK--IAEMKTGEGKTLVATLPAYL--NALTGK-------GVHVVTVNDYLARRDAEWMGQV 124 (904) T ss_pred HC-CCCHHHHHHHHHHHCCCC--EEEECCCCCHHHHHHHHHHH--HHHCCC-------CCEEEEECCHHHHHHHHHHHHH T ss_conf 37-856189999999980896--67831488628999999998--765179-------6279963504448889987899 Q ss_pred HHHCCCEEEEEECCCCHHHHHHHHCCCCEEEEECCC-----CHHHHHH--CCCCCCCCCEEEEEECCCCCC-C------- Q ss_conf 544698799998899879999961289759982231-----0133210--001224643189996131100-1------- Q gi|254780601|r 98 YAKTGVVVAVCIGGVSVHRERRDLQNGAHIVVGTPG-----RLCDHIR--GKGLNISHLKAVVLDEADEML-D------- 162 (573) Q Consensus 98 ~~~~~~~v~~~~gg~~~~~q~~~l~~~~~iiv~TPg-----rl~d~~~--~~~l~l~~v~~lVlDEaD~ml-~------- 162 (573) T Consensus 125 ~~FLGL~VGl~~~~m~~~eRr~--aY~cDITY~TNnELGFDYLRDNM~~~~ee~vqR~f~FAIIDEVDSILIDEARTPLI 202 (904) T TIGR00963 125 YRFLGLSVGLILSSMSPEERRE--AYACDITYGTNNELGFDYLRDNMALSKEEKVQRPFNFAIIDEVDSILIDEARTPLI 202 (904) T ss_pred HHHCCCEEEEECCCCCHHHHHH--HHCCCEEEECCCCCCHHHHHHHHHCCHHHHHCCCCCCEEEEEECCEEECCCCCCCC T ss_conf 9684936888617998589999--85498165326542024666764115012101672226886424464233368652 Q ss_pred --------CHHHHHHHHHHHHC---CCCCCEEEEECCCC-C-C----------------------CHH---HH------- Q ss_conf --------00123578887521---43342256311112-2-2----------------------001---11------- Q gi|254780601|r 163 --------LGFRDDIEFILDSS---PKKRRMLMFSATIS-P-A----------------------ITT---LA------- 197 (573) Q Consensus 163 --------~gf~~~i~~i~~~~---p~~~q~~l~SAT~~-~-~----------------------i~~---l~------- 197 (573) T Consensus 203 ISGpae~~~~~Y~ev~~~~~~l~e~~~~p~a~~~~~~l~e~W~~dY~vDeK~r~v~Lte~G~~~WaE~~L~~~g~~~~~~ 282 (904) T TIGR00963 203 ISGPAEKSTEKYLEVNKLVDPLKETDKLPQANEVAKALKEKWDVDYEVDEKNRNVLLTEKGMKKWAEDLLGVDGIIKGAV 282 (904) T ss_pred CCCCCCCCCCCHHHHHHHHHHHHCCCCCCCHHHHHHHHHHHCCCCCEEECCCCEEEECCCCHHHHHHHHHHHHHHHHHHC T ss_conf 35766786301001787886641665575044568998631167703510417465140117899987532432144301 Q ss_pred HH---------------------HCCCC------------------------------------CCCCCCCCCCCCCCCC Q ss_conf 12---------------------10123------------------------------------3332333232566520 Q gi|254780601|r 198 KN---------------------YQKDA------------------------------------VRVNIASENRQHSDID 220 (573) Q Consensus 198 ~~---------------------~~~~p------------------------------------~~i~~~~~~~~~~~i~ 220 (573) T Consensus 283 nLyd~~n~~~~hyi~nALkA~~lf~kDvdYIV~dgeV~IVDEFTGRim~GRR~SdGLHQAiEAKE~V~I~~En~T~AtIT 362 (904) T TIGR00963 283 NLYDLENSPLIHYILNALKAKELFEKDVDYIVRDGEVVIVDEFTGRIMEGRRWSDGLHQAIEAKEGVEIQNENQTLATIT 362 (904) T ss_pred CCHHHHHHHHHHHHHHHHHHHHHHHCCCCEEEECCEEEEEEEECCCCCCCCCCCCHHHHHHHHHCCCEEECCCCEEEEHH T ss_conf 30124533458889999999998743983588888789987305833889612422579999746860103552244044 Q ss_pred HHCC-----------------------------------------------CCCCCHHHHHHHH-CCCCC-CCCEEEEEC Q ss_conf 0000-----------------------------------------------0000002455420-01023-564167751 Q gi|254780601|r 221 YRAV-----------------------------------------------LVALSDRDNAIVN-ILRYH-GAKNAIVFC 251 (573) Q Consensus 221 ~~~~-----------------------------------------------~v~~~~k~~~l~~-ll~~~-~~~~~ivF~ 251 (573) T Consensus 363 yQNfFrlY~KLsGMTGTA~TE~~EF~~IYnL~Vv~vPTNrp~~R~D~~DlvY~te~~Kw~Av~~e~~~~h~~GqPvLvGT 442 (904) T TIGR00963 363 YQNFFRLYEKLSGMTGTAKTEEEEFEKIYNLEVVVVPTNRPVIRKDLPDLVYKTEEEKWKAVVDEIKEIHAKGQPVLVGT 442 (904) T ss_pred HHHHHHHHHHHCCCCCCHHHHHHHHHCCCCCEEEECCCCCCCCCCCCCCCEECCHHHHHHHHHHHHHHHHHCCCCEEEEE T ss_conf 57676542654468775689999840457751355166772344677773464768899999999999874689877752 Q ss_pred CCHHHHHHHHHHHHHCCCCCCCCCCCCCHHHHHHHHHHHHCCCEEEEEECCCCCCCCCCC---CCCEEEEECCCCCHHHH Q ss_conf 302334565555542266630104899999999998665448814998538650014578---87338970588747899 Q gi|254780601|r 252 STRASVSRFTKVLAEHLFQVVALSGELSQQERSNALQMMRDGRARVCIATDVAARGIDLP---DLELVIHAELSSNPENL 328 (573) Q Consensus 252 ~t~~~~~~l~~~L~~~g~~~~~lhg~~~q~~R~~~~~~fr~g~~~vLV~TDvaaRGiDi~---~v~~Vin~d~P~~~~~y 328 (573) T Consensus 443 ~svE~SE~LS~lL~~~~I~H~VLNAKPENh~rEAeIia~AG~kGAVTIATNMAGRGTDI~LGGN~~f~ar~~l---~~~l 519 (904) T TIGR00963 443 TSVEKSELLSKLLKERGIPHNVLNAKPENHEREAEIIAQAGRKGAVTIATNMAGRGTDIKLGGNPDFLARKKL---REIL 519 (904) T ss_pred CCHHHHHHHHHHHHHCCCCCCCCCCCHHHHHHHHHHHHHCCCCCCEEEEECCCCCCCCEEECCCHHHHHHHHH---HHHH T ss_conf 2177789999999857898122478744677899999960888641676247877645031787888768999---9999 Q ss_pred HHHHCCCCCCCC Q ss_conf 986030103788 Q gi|254780601|r 329 LHRSGRTGRAGR 340 (573) Q Consensus 329 vHR~GRtgRag~ 340 (573) T Consensus 520 ~~~~~~~-~~~~ 530 (904) T TIGR00963 520 MPKIVSL-EDKF 530 (904) T ss_pred HHHHHCC-CCCH T ss_conf 9885113-4530

HHsearch alignment for GI: 254780601 and conserved domain: TIGR00963