>TIGR00440 glnS glutaminyl-tRNA synthetase; InterPro: IPR004514 The aminoacyl-tRNA synthetases (6.1.1. from EC) catalyse the attachment of an amino acid to its cognate transfer RNA molecule in a highly specific two-step reaction. These proteins differ widely in size and oligomeric state, and have limited sequence homology . The 20 aminoacyl-tRNA synthetases are divided into two classes, I and II. Class I aminoacyl-tRNA synthetases contain a characteristic Rossman fold catalytic domain and are mostly monomeric . Class II aminoacyl-tRNA synthetases share an anti-parallel beta-sheet fold flanked by alpha-helices , and are mostly dimeric or multimeric, containing at least three conserved regions , , . However, tRNA binding involves an alpha-helical structure that is conserved between class I and class II synthetases. In reactions catalysed by the class I aminoacyl-tRNA synthetases, the aminoacyl group is coupled to the 2'-hydroxyl of the tRNA, while, in class II reactions, the 3'-hydroxyl site is preferred. The synthetases specific for arginine, cysteine, glutamic acid, glutamine, isoleucine, leucine, methionine, tyrosine, tryptophan and valine belong to class I synthetases; these synthetases are further divided into three subclasses, a, b and c, according to sequence homology. The synthetases specific for alanine, asparagine, aspartic acid, glycine, histidine, lysine, phenylalanine, proline, serine, and threonine belong to class-II synthetases . Glutaminyl-tRNA synthetase (6.1.1.18 from EC) is a class Ic synthetase and shows several similarities with glutamyl-tRNA synthetase concerning structure and catalytic properties. It is an alpha2 dimer. Glutaminyl-tRNA synthetase is a relatively rare synthetase, found in the cytosolic compartment of eukaryotes, in Escherichia coli and a number of other Gram-negative bacteria, and in Deinococcus radiodurans. In contrast, the pathway to Gln-tRNA in mitochondria, Archaea, Gram-positive bacteria, and a number of other lineages is by misacylation with Glu followed by transamidation to correct the aminoacylation to Gln.; GO: 0000166 nucleotide binding, 0004819 glutamine-tRNA ligase activity, 0005524 ATP binding, 0006412 translation, 0006425 glutaminyl-tRNA aminoacylation, 0005737 cytoplasm.

Probab=100.00 E-value=3.4e-37 Score=272.85 Aligned_cols=298 Identities=24% Similarity=0.347 Sum_probs=244.9 Q ss_pred EEEECCCCCCCCCCHHHHHHHHHHHHHHHHCCCEEEEEECCCCCCCCCHHHHHHHHHHHHHCCCCCCCCCCCCCCCCCEE Q ss_conf 05634843388785015999999999999718849999704866638867999999998865898886765588767632 Q gi|255764513|r 7 VRVRIAPSPTGEPHIGTAYTALFNYLIAKRTGGKFILRIEDTDSKRSTLESENAVMQSLKWCGLNWDEGPDIGGAYGPYR 86 (492) Q Consensus 7 v~~RfaPsPtG~lH~G~~rtal~n~l~a~~~~g~f~lRieDtd~~R~~~~~~~~i~~~l~wlgl~~De~~~~~g~~~p~~ 86 (492) T Consensus 1 V~TRFPPEPNGYLHIGHaK~I~~NFG~Ak~y~G~C~LRFDDTNP~KE~~EY~eSIK~~V~WLGFkw~g~--------~~Y 72 (564) T TIGR00440 1 VHTRFPPEPNGYLHIGHAKSICLNFGLAKEYKGTCNLRFDDTNPVKEDVEYVESIKRDVEWLGFKWEGK--------IRY 72 (564) T ss_pred CCCCCCCCCCCCEEHHHHHHHHHHCCCCCCCCCCEEEECCCCCCCCCCCHHHHHHHHHHHHCCCCCCCC--------EEE T ss_conf 977788557873001024313442032020176364421678886466017888752222225124773--------133 Q ss_pred CCCCHHHHHHHHHHHHHCCCEEECCCCHHHHHHHHHHHHHHHCCC--CCCCCCCCCCHHHHHHHHH--------CCCCCE Q ss_conf 326289999999999988982451488999776688766431000--2366555788333001120--------257740 Q gi|255764513|r 87 QSERKNIYQPYVQNLLEKKLAFRCFCSTERLEEMRRAQRKRNIPS--RYDGHCLKLSSQEIERLSQ--------EQKKHV 156 (492) Q Consensus 87 QS~r~~~y~~~~~~L~~~g~aY~c~~t~eel~~~r~~~~~~~~~~--~Y~~~~r~l~~~e~~~~~~--------~g~~~~ 156 (492) T Consensus 73 sSDYFD~Ly~~A~~LI~~G~AYV~~~t~e~i~~~RG~~-~~GtPGGer~~~~yRD~siE~NL~~F~~Mr~G~f~~G-~A~ 150 (564) T TIGR00440 73 SSDYFDELYRYAVELIKKGLAYVDELTPEEIREYRGTL-TDGTPGGERKNSPYRDRSIEENLALFEKMRDGKFKEG-KAI 150 (564) T ss_pred CHHHHHHHHHHHHHHHHCCCEEEECCCHHHHHHCCCCC-CCCCCCCCCCCCCCCCCHHHHHHHHHHHHHCCCCCCC-CEE T ss_conf 30468899999999986796067537878986327602-4788886556787654128899999999726897876-101 Q ss_pred EEEEECCC-CEEECCCCCCCCEECC-CCCCCCC-CEECCCCCHHHHHHHHHHHHHHHHHHHHCCCCCCCHHHHHHHHHHH Q ss_conf 78862243-1143047513402136-4323564-1000453248986788764444444311223543024788999998 Q gi|255764513|r 157 VRLTVPNQ-GSCVFQDKVYGEMEIP-WNAVDMQ-VLLKSDGMPTYHLANVIDDHLMKITHVARGEEWISSVPKHILLYQY 233 (492) Q Consensus 157 iR~k~p~~-~~~~~~D~i~G~~~~~-~~~~~D~-vi~r~dg~ptY~~a~vvDD~~m~ithviRg~d~~~~t~~q~~l~~a 233 (492) T Consensus 151 LR~K~D~~SP~~~M~d~v~YRi~~a~H~~TG~KW~I-----YP~YDFTHC~~Da~E~ITHSlCT~EF~~~R~~Y~W~~d~ 225 (564) T TIGR00440 151 LRAKIDLASPFIVMRDPVLYRIKFAEHHQTGTKWCI-----YPMYDFTHCISDALENITHSLCTLEFQDNRRLYDWVLDN 225 (564) T ss_pred HHHHHHHCCCCHHHHHHHHHHHHCCCCCCCCCCEEE-----CCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCC T ss_conf 100121027736774535212003688877881067-----476330466876550123333212233112344443315 Q ss_pred HHHC--CC---HHHHHHHHHHHHCCCCCCCCCC----------------CCHHHHHHCCCCHHHHHHHHHHCCCCCCCCC Q ss_conf 5100--00---0101455531101322122343----------------3024566629773779989985067666553 Q gi|255764513|r 234 FNFP--IP---EFIHLPLIKNPDKSKLSKRRNP----------------TSISYYSAMGYLPEALINFLALLFVHKSEDD 292 (492) Q Consensus 234 l~~~--~p---~f~H~pli~~~~g~klSKR~~~----------------~~i~~~~~~GylPeAilNyLalLGws~~~~d 292 (492) T Consensus 226 i~i~r~~P~Q~Ef~R----LNl~gTv~SKRKl~~LV~~~~V~GWdDPR~~T~~~lRRRG~~pa~i~~F~~~~GVT~~~~~ 301 (564) T TIGR00440 226 IHIERVRPAQYEFSR----LNLEGTVLSKRKLAKLVDDKFVEGWDDPRLPTISGLRRRGYTPASIREFIKRIGVTKQDNN 301 (564) T ss_pred EEEECCCCCCCCCEE----ECCCEEEHHHHHHHHHHCCCCCCCCCCCCHHHHHHHHCCCCCHHHHHHHHHHCCCCCCCCE T ss_conf 256037887431101----0210100226888764133400377888503134231178875899999986375433551 Q ss_pred HHHCCHHHHHHHHHHHHCCCCCCCCHHHHHH Q ss_conf 0110146777652021137554420156556 Q gi|255764513|r 293 DELMDMQQLIHHFDLHHLSKAGAVFDKQKLD 323 (492) Q Consensus 293 ~Eifsl~eli~~FdL~~I~Ks~A~FD~eKL~ 323 (492) T Consensus 302 i~~~~lEs~iR~~L~~~~PR~M~V~DPV~vV 332 (564) T TIGR00440 302 IEVVRLESCIREDLNENAPRAMAVIDPVKVV 332 (564) T ss_pred EEEEHHHHHHHHHHHCCCCCEEEEECCEEEE T ss_conf 6520144789865323788157887763788

HHsearch alignment for GI: 255764513 and conserved domain: TIGR00440