>TIGR00475 selB selenocysteine-specific translation elongation factor; InterPro: IPR004535 In prokaryotes, the incorporation of selenocysteine as the 21st amino acid, encoded by TGA, requires several elements: SelC is the tRNA itself, SelD acts as a donor of reduced selenium, SelA modifies a serine residue on SelC into selenocysteine, and SelB is a selenocysteine-specific translation elongation factor. 3' or 5' non-coding elements of mRNA have been found as probable structures for directing selenocysteine incorporation . This family describes the elongation factor SelB, a close homologue of EF-Tu. It may function by replacing EF-Tu. A C-terminal domain not found in EF-Tu is in all SelB sequences in the seed alignment except that from Methanococcus jannaschii. This family should not include an equivalent protein for eukaryotes. ; GO: 0003723 RNA binding, 0003746 translation elongation factor activity, 0005525 GTP binding, 0001514 selenocysteine incorporation, 0005737 cytoplasm.

Probab=100.00 E-value=0 Score=544.75 Aligned_cols=351 Identities=26% Similarity=0.427 Sum_probs=304.1 Q ss_pred EEEEEEECCCCCHHHHHHHHHHHHHHHHHCCCCCCCCHHHH-HCCCEEEEEEEEEECCC--EEEEEEECCCCHHHHHHHH Q ss_conf 79999904689887899999987644420013126868698-62920637899982199--0899984787302467798 Q gi|254780263|r 13 LGLSTIGHVDHGKTTLTAAITKYYSEEKKEYGDIDSAPEEK-LRGITIATAHVSYETDK--RFYSHIDCPGHADYVKNMI 89 (392) Q Consensus 13 ~ni~~iGhvd~GKSTL~~~L~~~~~~~~~~~~~~D~~~~E~-~rGiTi~~~~~~~~~~~--~~i~iiD~PGH~~f~~~mi 89 (392) T Consensus 1 ~~~at~GHvDHGKT~L~k~LTgi~st------sa~~lPeEkqKRG~tIDLGfAy~~l~~~n~~l~~iDvPGHe~fl~n~l 74 (627) T TIGR00475 1 MIIATAGHVDHGKTTLLKALTGIDST------SADRLPEEKQKRGMTIDLGFAYLPLPDINKRLGFIDVPGHEKFLSNAL 74 (627) T ss_pred CEEEEECCCCHHHHHHHHHHCCCCCH------HHHCCCCCCCCCCCEEECCCEECCCCCCCCCCEEEECCCHHHHHHHHH T ss_conf 96873124450479999985064301------231277410257662460420036777771334785597389999986 Q ss_pred HHHHCCCCEEEEECCCCCCCCCHHHHHHHHHHCCCCCEEEEECCCCCCCCHHHHHHCCCCCCEEEEEEEEEEEEECCCCE Q ss_conf 77400233145201234433210677888863187602331002333561222110123210011101453221023311 Q gi|254780263|r 90 TGATQADGAILVCAAEDGPKPQTREHILLARQIGISSIVVYMNKVDAVDDDELLDISEYEIRDLLKEHKYSDDTPIIRGS 169 (392) Q Consensus 90 ~g~~~~D~ailvVda~~G~~~QT~eh~~l~~~lgi~~iIv~iNKmD~v~~~~~~~~i~~~i~~~l~~~~~~~~~pii~~s 169 (392) T Consensus 75 Ag~~~i~~alLvVda~eG~~~QT~EHL~vl~~l~~~~~ivvltK~D~~d~~-~~~~~E~~~~~~l~~~~~~~n~~~~~~S 153 (627) T TIGR00475 75 AGIGGIDAALLVVDADEGVMTQTKEHLAVLKLLGIPELIVVLTKADRVDEE-EVKRVEEELKEILEEYEFLKNAKIFKTS 153 (627) T ss_pred HHHHHHHHHEEEECCCCCCCCCHHHHHHHHHHHCCCEEEEEEECCCCCCHH-HHHHHHHHHHHHHHHHHHHCCCCEEEEE T ss_conf 675654010035415778853238999999970896199997346745658-9999999999998764321157479991 Q ss_pred EEEEEECCCCCCCCCCCCCHHHHHHCCCCCCCCCCCCCCCEECCCCCCCCCCCCCEEEEEEECCCCCCCEEEEEECCCCC Q ss_conf 46764114445652123320344310252222100001100000001355445430148742453489679995068743 Q gi|254780263|r 170 ALCALQGTNKELGEDSIHALMKAVDTHIPTPQRSLDAPFLMHIEGSCGIEGRGTVVTGCIKRGRIKAGSDVEIIGMGGKK 249 (392) Q Consensus 170 a~~g~~~~n~~~~~~~~~~Ll~~i~~~~~~p~~~~~~p~r~~I~~vf~i~g~G~Vv~GrV~sG~l~~Gd~i~i~p~~~~~ 249 (392) T Consensus 154 A~tG~Gi~---~Lk~~L~~L~e~~~~-----~r~~~~~lr~~iD~aF~vKG~GtVvtGt~f~G~VkvGD~~~~~pig--- 222 (627) T TIGR00475 154 AKTGQGIE---ELKKELKNLLESLDI-----KRDKQKPLRLAIDRAFKVKGAGTVVTGTAFSGEVKVGDKLVLEPIG--- 222 (627) T ss_pred CCCCCCHH---HHHHHHHHHHHHHHH-----HHCCCCCCCCCCCEEEEECCCEEEEEEEEEEEEEEECCEEEEEECC--- T ss_conf 34687778---999999865777655-----4201566651032155870302468755784168988889981058--- Q ss_pred CCEEEECCCCCCCCCCCCCCCHHHHHHHC-CCCCCEEECHHEEECCCCCCCCEEEEEEEEEEECCCCCCCCCCCCCCEEE Q ss_conf 21254121001211443210013666411-24543220211773267776300016899971056787555511597899 Q gi|254780263|r 250 LKVKCTDVEMFRKKLDEAIAGDNVGLLLR-GVNRADVPRGRVVCAPGSIQEYSRFRASVYILTASEGGRTTGFMDNYRPQ 328 (392) Q Consensus 250 ~~~kv~si~~~~~~v~~a~aGd~v~l~Lk-gi~~~di~rGdvl~~~~~~~~~~~f~A~i~il~~~~~~~~~~~~~~~~~~ 328 (392) T Consensus 223 ~~~rvk~~~~~~~~~~~A~AG~RiALnL~~~vd~~~~~RGDWll~~~p~~~~~~~v~~~--~a------~v~L~~~~~~~ 294 (627) T TIGR00475 223 KEVRVKAIQAQNQDVEKAVAGQRIALNLAADVDKEKLKRGDWLLILKPEDPKKRVVVKL--KA------EVPLKELQPYH 294 (627) T ss_pred CEEEEEEEECCCCCCCEEECHHHHHHHCCCCCCCCCCCCCCEEECCCCCCCCCEEEEEE--EE------ECCCCCCCEEE T ss_conf 36788640205885221002013654123457612256651220278888553278999--85------11235374046 Q ss_pred EEECCEEEEEEEEECCCHHHHCCCCEEEEEEEECCCEEECCCCEEEEEE--CCEEEEEEEEEEE Q ss_conf 9954147779999618955707897699999977817754698499998--9969998999553 Q gi|254780263|r 329 FFMDTADVTGRIILSPGSQAVMPGDRVDLEVELIYPIAMEPNQTFSMRE--GGKTVGAGLILEI 390 (392) Q Consensus 329 ~~~~~~~v~~~i~~~~~~~~i~~g~~~~v~l~l~~pi~~e~~~rfilRd--~~~tig~G~I~~v 390 (392) T Consensus 295 ~~~~~~~~~gk~sll~~~n-aakndrtl~l~~l~~~~~~~~~dkL~~~~~s~~n~laGArVl~~ 357 (627) T TIGR00475 295 IFHGMSETTGKISLLDKKN-AAKNDRTLALLVLDEPLILAKGDKLVLRDISSKNLLAGARVLEP 357 (627) T ss_pred EECCCCEEEEEEEEEECCC-CCCCCCEEEEEEECCCCEEECCCEEEEECCCCCCCCCCEEEECC T ss_conf 4203401420488971776-43234427999845742010486578713663431123178324

HHsearch alignment for GI: 254780263 and conserved domain: TIGR00475