>TIGR00450 thdF tRNA modification GTPase TrmE; InterPro: IPR004520 The GTP-binding domain of all TrmE/ThdF orthologues is found in the C-terminal portion of the molecule. The N-terminal half can be removed without affecting the GTP-binding/hydrolysis function of the GTP-binding domain. The last four amino acids of all orthologues of ThdF/TrmE are highly conserved, being either CIGK or CLGK. This matches the Caax (where 'a' represents an aliphatic amino acid, and 'x' represents any amino acid) motif for isoprenylation that anchors small GTP-binding proteins to cell membranes in eukaryotic cells. However, protein isoprenylation has never been shown to occur in bacteria. Interestingly, biochemical experiments have shown that the Escherichia coli TrmE protein peripherally associates with the membrane fraction . Although the biochemical properties of TrmE have been investigated for the E. coli and Thermotoga maritima proteins, nothing is known about the relationship of this protein to tRNA modification. Orthologues of TrmE are present in eukaryotes and bacteria, but are not present in archaea. In Saccharomyces cerevisiae, Mss1p is a nuclear-encoded mitochondrial protein that is the yeast orthologue of TrmE. Mss1p interacts with the 15S rRNA of the yeast mitochondria, which is equivalent to the 16S rRNA of bacteria. Subsequent analysis of the S. cerevisiae MTO1 gene suggests that MSS1 and MTO1 act together in a pathway involved in optimizing mitochondrial protein synthesis. TrmE may play a role in tRNA processing and may be directly or indirectly involved in regulating ribosome function.; GO: 0003924 GTPase activity, 0005525 GTP binding, 0006400 tRNA modification, 0005622 intracellular.

Probab=100.00 E-value=0 Score=831.97 Aligned_cols=427 Identities=34% Similarity=0.513 Sum_probs=362.4 Q ss_pred CCCCCCCCEEEEECCCHHHHHHHHHHHCC---C--CCCCCEEEEEEEECCCCCEEEEEEEEE-ECCCCCCCCCCEEEEEE Q ss_conf 46886761699972738899999987166---8--888753899887548986720699999-56779988775399980 Q gi|254780809|r 12 STGALPSAISIIRLSGPSCFQVCEFICKK---K--KPFPRKASLRYFFGLDGRILDKGLLIV-FPSPESFTGEDSAEFHV 85 (440) Q Consensus 12 aTp~g~~aiaviRiSG~~~~~i~~~~~~~---~--~~~~~~~~~~~~~~~~~~~iD~~l~~~-f~~P~SyTGEDvvEi~~ 85 (440) T Consensus 5 ai~~~~sAi~iir~SG~~~~~i~~~it~~Ph~~~~~~~g~ri~y~~~~~~~~~~~~d~ll~~l~~AP~SyTGeD~iEi~C 84 (473) T TIGR00450 5 AIPPFNSAIHIIRLSGPDSLSILKKITDAPHNKKKTAEGMRIQYGHIIDSNNKALDDELLLKLVAAPNSYTGEDVIEIQC 84 (473) T ss_pred CCCCCCCCEEEEEECCHHHHHHHHHHHCCCCCCCCCCCCCEEEEEEEEECCCCCHHHHHHHHHHHCCCCCCCCCEEEEEE T ss_conf 23424676179970547899999986247111001457761789999716864028888988875679878873589960 Q ss_pred CCCHHHHHHHHHHHHHHHH-HHHCCCHHHHHHHHHHCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHCCCHHHHHHHHHHH Q ss_conf 8987889999998754432-000000368997875215677777788988500368899988753143102456656776 Q gi|254780809|r 86 HGGIAVVNGILEELAKMPN-LRLANPGEFSRRAFENGKIDLLEAESLADLISSETEMQRRLSMEGMSGELSSLYGQWIDK 164 (440) Q Consensus 86 HG~~~i~~~il~~l~~~~g-~r~A~pGEFT~RAflNgKidL~qaEai~~LI~A~t~~~~~~a~~~l~G~ls~~i~~lr~~ 164 (440) T Consensus 85 HGs~~~v~~i~~L~L~~-GGar~A~PGEFt~raFLn~k~dL~~aea~~~Lil~~~~~~~~~~l~~L~G~l~~~i~~~~~~ 163 (473) T TIGR00450 85 HGSVLIVQEILQLLLKS-GGARLAKPGEFTQRAFLNGKMDLTQAEAINELILAPNEKVKDIALNKLAGELDQKIEELRKS 163 (473) T ss_pred CCCCHHHHHHHHHHHHC-CCCEECCCCCCHHHHHHHCCCCHHHHHHHHHHHCCCCHHHHHHHHHHCCCCHHHHHHHHHHH T ss_conf 78704788999999835-88023267652046664124477899988775438887799999985067122568999999 Q ss_pred HHHHHHHHHHHHCCCCCCCHH--HHHHHHHHHHHCCCHHHHHHHHHHHH-----H-HHHHHHCCCEEEECCCCCCHHHHH Q ss_conf 998886544431135443112--33258888640100011212333223-----4-554320230243114663188899 Q gi|254780809|r 165 LTHIRSFIEADLDFSEEEDVQ--NFSSKEVLNDILFLKNDISSHISQGK-----L-GEIIRNGYKIVILGHSNAGKSSLF 236 (440) Q Consensus 165 L~~~~a~iEa~IDF~dEedi~--~~~~~~~~~~i~~i~~~l~~ll~~~~-----~-~~~l~~g~~v~i~G~pN~GKSSL~ 236 (440) T Consensus 164 ~l~ll~~~ev~iDY~~~-~~e~d~~~~~~~~~~~~~~~~~L~~i~~~~~aq~~~~vl~~l~~g~k~ai~G~~NvGKSSLL 242 (473) T TIGR00450 164 LLQLLAQVEVNIDYEED-DDELDQLELVSLNQKLEKIIAELKDILNSANAQRSKKVLEKLKDGFKLAIVGKPNVGKSSLL 242 (473) T ss_pred HHHHHHHHHHCCCCCCC-CCCCCHHHHCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCEEEEECCCCCCHHHHH T ss_conf 98888874310267545-77531120001789999999999999987641003458998408947999647887578999 Q ss_pred HHHHCCHHCCCCCCCCCCEEECCCCCCCCCEEEEEEECCHHCCCCHHHHHHHHHHHHHHHHHHCCEEECCCCCCHH---H Q ss_conf 9985520002345468721100012456835899950810002410356666788899850301102013589856---6 Q gi|254780809|r 237 NALAKKDVAIVTDIPGTTRDVLTIDLDLEGYLVKISDTAGIRETDDIVEKEGIKRTFLEVENADLILLLKEINSKK---E 313 (440) Q Consensus 237 N~L~~~~~aIVs~~~GTTRD~i~~~~~i~g~~~~l~DTaGir~t~d~IE~~GI~ra~~~i~~aDlil~v~D~~~~~---~ 313 (440) T Consensus 243 Na~l~~DrAiVS~~kGtTRD~vE~~~~L~G~~~~~lDTAGiR~~~~~~E~~GiekS~~~i~~A~LVi~~~D~~~~~~~dd 322 (473) T TIGR00450 243 NALLKQDRAIVSDIKGTTRDVVEGDFELNGILVKLLDTAGIREHADKVERLGIEKSFKAIKQADLVIYVLDASQPLTKDD 322 (473) T ss_pred HHHHHCCCEEEECCCCCCCCEEEEEEEECCEEEEEEECCCCCCCHHHHHHHHHHHHHHHHHHCCEEEEEEECCCCCCHHH T ss_conf 98762287055276688320442057774678998514675102004667768998999860573478887478988105 Q ss_pred ---HH--HHCCCCCCCCCCCCCCCCCC-CHHHH----------HHHHHHH---HHHHHHHHHHHHHHHHHHCCC--CCCC Q ss_conf ---34--31289853222233344654-20000----------0133332---323589999999996322035--8863 Q gi|254780809|r 314 ---IS--FPKNIDFIFIGTKSDLYSTY-TEEYD----------HLISSFT---GEGLEELINKIKSILSNKFKK--LPFS 372 (440) Q Consensus 314 ---~~--~~~~~~~i~V~NK~Dl~~~~-~~~~~----------~~ISakt---g~Gi~~L~~~I~~~l~~~~~~--~~~~ 372 (440) T Consensus 323 f~li~~~~k~~k~~~~V~NK~DL~~nkr~~~~~~~~~~~~~~~~~~~~~~~~~~~~~d~L~~~i~~~~~~~~~~iG~~~~ 402 (473) T TIGR00450 323 FELIITLNKKKKPLILVLNKIDLAINKRKLELEFLVSELKLTVLLLSAKQLKIKALVDLLTQKINAFYSKERDEIGLDLY 402 (473) T ss_pred HHHHHHHHHCCCCEEEEECCCCCCCHHHHHHHHHHCCHHHHHHHHHHHHHCCCHHHHHHHHHHHHHHHHHHHHHHHHHHH T ss_conf 89999973217977999735016500234444441311345788998873065667999999999874144453104688 Q ss_pred EEHHHHH-HHHHHHHHHHHHH-HHHHC-CCCCCHHHHHHHHHHHHHHHHHHCCCCHHHHHHHHHHCCCCCC Q ss_conf 2014899-9999999999999-97532-7998014659999999863567185311587416765057899 Q gi|254780809|r 373 IPSHKRH-LYHLSQTVRYLEM-ASLNE-KDCGLDIIAENLRLASVSLGKITGCVDVEQLLDIIFSKFCIGK 440 (440) Q Consensus 373 i~~~~Rq-~~~L~~a~~~L~~-~~~~~-~~~~~EliAeeLr~A~~~L~eItG~~~~EdiLd~IFs~FCIGK 440 (440) T Consensus 403 l~~~~~~~~~~le~a~~~L~~t~~~~~~~~l~~D~l~~hl~~a~~~l~~~tG~~~~~~~ld~iF~~FCLGK 473 (473) T TIGR00450 403 LISSWQAVLILLEKAIAELQQTLLEKLERQLFLDLLVIHLREAINALGQVTGETVTEDVLDEIFSNFCLGK 473 (473) T ss_pred HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCCCHHHHHHHHHHCCCCC T ss_conf 87448999999999999999999987425666899999999999988865077553679998863037899

HHsearch alignment for GI: 254780809 and conserved domain: TIGR00450