>TIGR00435 cysS cysteinyl-tRNA synthetase; InterPro: IPR002308 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 . Cysteinyl-tRNA synthetase (6.1.1.16 from EC) is an alpha monomer and belongs to class Ia.; GO: 0000166 nucleotide binding, 0004817 cysteine-tRNA ligase activity, 0005524 ATP binding, 0006412 translation, 0006423 cysteinyl-tRNA aminoacylation, 0005737 cytoplasm.

Probab=98.98 E-value=1.7e-07 Score=71.45 Aligned_cols=421 Identities=21% Similarity=0.250 Sum_probs=198.0 Q ss_pred CCHHCCCCCCCCCCCEECCCCCCCCCCCCCHHHHHHHHHHHHHHHHHH-HCCCCCCEEECCCCCCHHHHHH-------H- Q ss_conf 622138876565541000223443224411777778568999999998-5066641020147753145556-------7- Q gi|254780285|r 108 SGIEYGRNLIGKGTKVNIEFVSANPTGPMHVGHCRCAVVGDTLASLMA-FSGYEVTREYYINDAGAQINTL-------A- 178 (586) Q Consensus 108 ~~~~yG~~~~~~~~kVvVE~sSpNp~KplHVGHlRsaiIGdsi~ril~-~~G~~V~r~nyvgD~G~Q~~~l-------i- 178 (586) T Consensus 10 ~K~~F--~pl~~~~~V~~Y~CGpTVYd~~HiGhaR~~i~fD~~~R~L~d~~GY~V~yV~NiTDIGhltGdlddGDDKIIk 87 (660) T TIGR00435 10 QKEEF--EPLVQGKKVKMYVCGPTVYDYAHIGHARTAIVFDVLRRYLEDYLGYEVQYVQNITDIGHLTGDLDDGDDKIIK 87 (660) T ss_pred CCCCC--CCCCCCCEEEEEEECCHHHHHHCCCCCCCHHHHHHHHHHHHHHHCCEEEEEEEEEECCCCCCCCCCCCHHHHH T ss_conf 63524--1124885667997073176210303466302578889999887588678886431200001677775048999 Q ss_pred ---------H-------------------HHHHHHHHHCCCCCCCCC--H-----------------H------------ Q ss_conf ---------8-------------------987532221024500066--0-----------------1------------ Q gi|254780285|r 179 ---------L-------------------SVFWRYQQALYNNDSDLP--E-----------------G------------ 199 (586) Q Consensus 179 ---------~-------------------~~~~~~~~~~~~~~~~~~--e-----------------~------------ 199 (586) T Consensus 88 ~A~~~~~~~~~~kendtkfnatvvdkvktalfqyinknftiqGseiktieefetWlsnadtetlklenPkfP~hvtavqn 167 (660) T TIGR00435 88 RAREEGETVEEVKENDTKFNATVVDKVKTALFQYINKNFTIQGSEIKTIEEFETWLSNADTETLKLENPKFPMHVTAVQN 167 (660) T ss_pred HHHHCCCCHHHHHHCCCHHHHHHHHHHHHHHHHHHHHCCEECCCHHHHHHHHHHHHHCCCCCHHCCCCCCCCCHHHHHHH T ss_conf 98751564788740122000256778899999987520011252000367777765203310100137888521677888 Q ss_pred ----HCCCCCH-HHHHHHHHHHHHHHHHCCCCHHHHHHHHHHHHHHHHHHHHH-----HHHHCCCCCCC-EECHHHHHHC Q ss_conf ----1024100-00127888887576413430237999999978998875455-----58870875210-0015887301 Q gi|254780285|r 200 ----YYPGVYL-KHVGKELADKYSSELLNFPEEKWLPIVKDYSVQAMMKIIRD-----DLKALNIQHDI-FISEDDFHRG 268 (586) Q Consensus 200 ----~~~~~y~-~~~~~e~~~~~~~~~~~~~e~~~~~~~~~~~~~~~~~~~~~-----~l~~l~i~fD~-~~~Es~~~~~ 268 (586) T Consensus 168 aiesitkGds~daevafekvkdvtvPlld---kelGstisnPe~~~~i~aY~~qkfndD~~aLNv~~p~~~pr~te~i-- 242 (660) T TIGR00435 168 AIESITKGDSMDAEVAFEKVKDVTVPLLD---KELGSTISNPESERFIEAYFEQKFNDDLEALNVLPPDLEPRVTEHI-- 242 (660) T ss_pred HHHHHHCCCCCHHHHHHHHHHHCCCCCHH---HHHCCCCCCCHHHHHHHHHHHHHHHHHHHHCCCCCCCCEEEECCCC-- T ss_conf 88764236630256766644001021010---1113432560168899999865578888742873884016631124-- Q ss_pred CHHHHHHHHHHHHHCCCCCCCC-CC----CCCCC---CCCCCCCC---CCCEEEEHHHCCCCCCCCCC-CCCCCHHHHHH Q ss_conf 0457999999999749851134-26----75556---54200024---78156510110222222210-24652135688 Q gi|254780285|r 269 DPSPIRDIIDNLARQGYVYEGI-LP----PPKSK---TTQKCDMD---RKQLLFRSTMVGDDVDRPLL-KSDGSYTYFAA 336 (586) Q Consensus 269 ~~~~i~~~i~~l~~~g~~~e~~-~~----~~~~~---~~~~~~~~---~~~~~~~~~~~g~~~d~vl~-rsDGt~~Y~t~ 336 (586) T Consensus 243 --d~iie~i~~L~~KgyAY~~~~GdVYF~v~~f~ksPnh~YG~Ls~Wn~~~~--~~l~~g~~-~~v~~~~P~Ga~Kr~~~ 317 (660) T TIGR00435 243 --DEIIEFIEQLIEKGYAYVSDNGDVYFDVSKFKKSPNHDYGKLSGWNKQSL--DELEAGAR-VRVDEAKPDGAKKRNKL 317 (660) T ss_pred --CHHHHHHHHHHHCCCEEEECCCCEEEECCCCCCCCCCCCCCCCCCCCCCH--HHHHCCCC-CCCCCCCCCCCCCCCCC T ss_conf --31478999998689205306886465316778888887643267555544--66625786-45523588753356776 Q ss_pred HHHHHHHHHHCCCC--CCCC--CCCCCHHH-HHHHHHHHHHHH----------------------------------C-C Q ss_conf 89999997522555--4333--67776136-899999999972----------------------------------2-6 Q gi|254780285|r 337 DLAYFKCKYERGFD--NMIY--VMGSDHSG-YVKRLEAVAAAV----------------------------------S-E 376 (586) Q Consensus 337 DiA~~~~k~e~~~d--~~iy--Vv~~~Q~~-h~~~v~~~~~~l----------------------------------g-~ 376 (586) T Consensus 318 DF--vLWK~~k~g~~~E~~W~SPWG~GRPGWHiECS~M~~~~LgltntP~~~DIH~GG~DL~FPHHENE~Aqs~a~~gn~ 395 (660) T TIGR00435 318 DF--VLWKSAKEGKDQEPKWDSPWGKGRPGWHIECSAMVDKYLGLTNTPDQIDIHGGGVDLIFPHHENEIAQSEALFGNK 395 (660) T ss_pred CH--HHHHCCCCCCCCCCCCCCCCCCCCCCHHHHHHHHHHHHCCCCCCCCCCEECCCCCCCCCCCCHHHHHHHHHHHCCC T ss_conf 50--2220067887777431777888888158999999997513567865430134887788878778999999872898 Q ss_pred CCCCCEEEECCHHHCCCCCCCCCCCCCCCCHHHHHHHHH-HHHHHHHHHHHHHHCCHHHHHHHHHHHHHHCC--CCHHHH Q ss_conf 634511531101101221100000122330245677777-63211234555420001233344777653202--443678 Q gi|254780285|r 377 KKAQINVLLCELVRLYRDGMPIKMSKRAGDFITLRHVVD-EVGSDSVRFMMLWRKNSELLDFDFCKVKEQSK--ENPVFY 453 (586) Q Consensus 377 ~~~~~~~~~~~~v~l~~dg~~~kmstR~G~~v~l~dll~-evg~~aiky~~L~~~~~~~~~Fd~d~~l~~~~--~nt~~Y 453 (586) T Consensus 396 ~~~~-yW~H~G~~~i--d~e--KMSKSLgNF~~v~D~L~q~~d~~~lR~~~l~~HYr~pLdf~e~~l~~-aksfe~~~-- 467 (660) T TIGR00435 396 QLAK-YWLHNGFLMI--DNE--KMSKSLGNFITVRDVLKQNYDPEVLRYLLLSVHYRSPLDFSEELLEA-AKSFENAL-- 467 (660) T ss_pred CEEE-EEEECCEEEE--CCC--CCCHHHHHHHHHHHHHHCCCCHHHHHHHHHHHHHCCCCCCCHHHHHH-HHHHHHHH-- T ss_conf 5689-9985177897--672--16515556888886874276899999998765531456747889999-98899999-- Q ss_pred HHHHHHHHHHHHHHHHHHCCCCCCCCCCCCCCCCCCCCCHHHHHHHHHHHHHHH---HHH-HHHHHCCCHHHHHHHHHHH Q ss_conf 888888899998753320024683223422355211499899999999842189---999-9998528127999999999 Q gi|254780285|r 454 VQYAYARCRSIFRQAKDIFPDLDFDLFPRNVIPQESEFDTSELQLIVHLAEYPR---VIE-NATIAQEPYKLAFYLYDLA 529 (586) Q Consensus 454 iqYa~aR~~SIlrKa~~~~~~~~~~~~~~~~~~~~~~~~~~E~~L~~~l~~f~~---vi~-~a~~~~~P~~l~~Yl~~La 529 (586) T Consensus 468 -----~~l~~~l~~~~~~~~~~--~~~~~~~~~----~~~~~~~~~---~~F~Eseskvhsa~~dDlN~a~Al~vL~el~ 533 (660) T TIGR00435 468 -----ERLYKALRNLDTDLAYS--KEFGENKDP----KNVDEKEFE---AAFEESESKVHSAMDDDLNTANALAVLFELA 533 (660) T ss_pred -----HHHHHHHHHHHHHCCCC--CCCCCCCCC----CCCHHHHHH---HHHHHHHHHHHHHHHHCCCHHHHHHHHHHHH T ss_conf -----99999999875310342--223424356----642256578---6643203577888750578068999999999 Q ss_pred HHHHH---HHHHCCCCCCCCCCCCCCHHHHHHHHHHHHHHHHHHHHHHHHC----CCCC Q ss_conf 98899---9870686666654357878999999999999999999987315----8798 Q gi|254780285|r 530 SVFHG---HWSHGRENPRLRFVQANNRKLTMMRLQLVHAVASIINSGLNII----GVES 581 (586) Q Consensus 530 ~~Fn~---fY~~~~~~~~~~v~~~~~~~~~~~RL~L~~a~~~vL~~~L~LL----GI~~ 581 (586) T Consensus 534 ~~~N~~~~l~~~-----------------~~~~~~~~~~~l~~L~~~l~~~~rii~~~~ 575 (660) T TIGR00435 534 KSINKKLDLTEV-----------------SKADAALLIEALIELESVLGLLLRIIGLPS 575 (660) T ss_pred HHHCCCCCCCCC-----------------CHHHHHHHHHHHHHHHHHHHHHHHHHCCCC T ss_conf 984001576512-----------------477899999999999999999999854887

HHsearch alignment for GI: 254780285 and conserved domain: TIGR00435