>TIGR02326 transamin_PhnW 2-aminoethylphosphonate--pyruvate transaminase; InterPro: IPR012703 Phosphonates are a class of organophosphorus compounds, characterised by a stable C-P bond, which are found in a variety of biologically produced molecules including antiobiotics, lipids, proteins and polysaccharides . The functions of these molecules include phosphorus storage, cell communication, host recognition and chemical warfare. 2-Aminoethylphosphonate (AEP), the most common naturally occurring phosphonate, is an important precursor used in the biosynthesis of phosphonolipids, phosphonoproteins, and phosphonoglycans. This entry represents 2-aminoethylphosphonate-pyruvate transaminase (AEPT)(2.6.1.37 from EC) which catalyses the interconversion of AEP and phosphonoacetaldehyde (P-Ald), coupled with the interconversion of pryuvate and L-alanine. In some bacterial species this is the first step in an AEP degradation pathway which allows them to utilise this compound as a source of carbon, nitrogen and phosphorus. Phosphonoacetaldeyhde hydrolase, often encoded by an adjacent gene, then converts P-Ald to acetaldehyde and phosphate.Species with this pathway generally have an identified phosphonate ABC transporter but do not also have the multisubunit C-P lyase complex as found in Escherichia coli. The crystal structure of AEPT from Salmonella typhimurium has been studied to 2.2 A resolution . The protein is a homodimer where each subunit is composed of two domains, large and small. The large domain forms an alpha-beta complex characteristic of the aspartate transaminase family, while the small domain is comosed of highly twisted beta strands. The active site contains a pyridoxal 5'-phosphate cofactor and is found at the domain interface, being composed of residues from both subunits..

Probab=98.74 E-value=1.8e-05 Score=58.67 Aligned_cols=322 Identities=16% Similarity=0.134 Sum_probs=219.4 Q ss_pred HCCCCCCCCCCCCHHHHHHHHCCCCCCCCCCCCCCCCCCCCHHHH-HHHHHHHHHHHHHCCC---CC--EECCCHHHHHH Q ss_conf 388810430102989999830510288657988875336006799-9999999999987188---63--01000016799 Q gi|254780349|r 34 DEIQLIASENIVSRAVLEAQGSILTNKYAEGYPSKRYYGGCQYVD-DIENIAIERAKKLFNV---NF--VNVQSHSGSQM 107 (433) Q Consensus 34 ~~l~LiASEN~~S~~v~~~l~S~l~nkyaeG~pg~ryy~G~~~~d-~iE~la~~~a~~lF~a---~~--anvqp~SG~~A 107 (433) T Consensus 3 ~ylLLTPGPLtTs~~vk~aMl~D~CtWD~d------------Yn~~~~~~ir~~L~-~la~~~~~~YT~VllQG-SGtf~ 68 (366) T TIGR02326 3 EYLLLTPGPLTTSKTVKEAMLVDWCTWDSD------------YNEDVVESIRQKLL-KLATAEEEKYTTVLLQG-SGTFA 68 (366) T ss_pred CCCCCCCCCCCHHHHHHHHHHCCCCCCCHH------------HHHHHHHHHHHHHH-HHHHCCCCCEEEEEECC-CCHHH T ss_conf 985357887630068888662104587155------------31367999999999-98606898546786127-51255 Q ss_pred HHHHHHHHHC-CCCEEEECCCCCCCCCCCCCCCCC--CCCCCCCCCCCCCCCCCCCCHHHHHHHHHHHCC----CEEEEE Q ss_conf 9999998315-487488123344841114766543--333322013665832356598999999986046----678970 Q gi|254780349|r 108 NQGVFLALMH-PGDSFMGLSLDSGGHLTHGSSVNM--SGKWFKAIPYNVRKEDGLLDMHEIESLAIEYNP----KLIIVG 180 (433) Q Consensus 108 n~av~~ALl~-pGD~Il~~~l~~GGHlshg~~~~~--~g~~~~~~~y~~d~~~~~ID~d~~~~~a~~~kP----klIi~G 180 (433) T Consensus 69 VEA~iGs~~pr~~~klLv~~NGAY-----G~R~~~ia~~l~i~~~~~~~~-E~~~~~~~~ve~~L~~dp~ItH~A~vHcE 142 (366) T TIGR02326 69 VEAVIGSAVPRKDGKLLVVINGAY-----GKRIAQIAEYLQIPHHVVETE-ENEPTNVVEVEAILAADPAITHVALVHCE 142 (366) T ss_pred HHHHHHCCCCCCCCEEEEEECCCH-----HHHHHHHHHHHCCCEEEEECC-CCCCCCHHHHHHHHHCCCCCEEEEEEECC T ss_conf 566541124788973899717853-----478999999847861675158-77777889999998518971278898367 Q ss_pred CCCCCCCCCHHHHHHHHHHCCCEEEECCCCHHHHHHHHCCCCCCCC----CCEEEECCCCCCCCCCC-EEEEECCCCHHH Q ss_conf 5524353637999988641797899186201244320001232200----23567404565225674-489833620565 Q gi|254780349|r 181 GTAYSRVWDWERFRSIADSIGAYLMADISHISGLVVGGQHPSPVPH----CHIVTTTTHKSLRGPRG-GLIMTNHADLAK 255 (433) Q Consensus 181 ~S~y~~~~d~~~l~eIa~~~ga~l~~D~aH~~GLIa~g~~~~Pl~~----ADvvt~sTHKtl~GPrg-GiI~~~~~e~~~ 255 (433) T Consensus 143 TtT-GiLNPi~~~~~~~~~hGk~~ivDAMSSfGgi-------~idi~~l~~D~LIssanKCi~GVPGfgFviA~~~~L~~ 214 (366) T TIGR02326 143 TTT-GILNPIEAVAKVAKRHGKVTIVDAMSSFGGI-------PIDIAELDIDYLISSANKCIQGVPGFGFVIAKQAELEK 214 (366) T ss_pred CCC-CCCCHHHHHHHHHHHCCCEEEEECCCCCCCC-------HHHHHHHCCCEEEECCCCCCCCCCCHHHHHHHHHHHHH T ss_conf 526-6211289999999855977998534113760-------01164325676352347813376843667768999986 Q ss_pred HCCHHHC------------------HHHHHHHHHHHHHHHHHHHHHHHCHHH-HHHHHHHHHHHHHHHHHHHHCCCCCC- Q ss_conf 0166465------------------432234455666899999999735648-99999999888999999861685233- Q gi|254780349|r 256 KINSAIF------------------PGLQGGPFMHSIAAKAVAFGEALSSEF-RDYAKQIVLNSQALAKKLQFLGFDIV- 315 (433) Q Consensus 256 ~i~~avf------------------Pg~qg~~~~~~iaa~aval~Ea~~~~f-~~Ya~qvv~NA~~La~~L~~~G~~vv- 315 (433) T Consensus 215 ~~g~arSLsLDLydQw~~M~~~~GkWRF-T-sPTHvV~Af~qAL~el~~EGGv~aR~~RY~~nq~~L~~~m~~LGF~~ll 292 (366) T TIGR02326 215 CAGNARSLSLDLYDQWECMEKQHGKWRF-T-SPTHVVHAFAQALLELEKEGGVEARYQRYQSNQKLLVAGMRALGFEPLL 292 (366) T ss_pred HCCCCCHHHHHHHHHHHHHHCCCCCEEE-C-CCHHHHHHHHHHHHHHHHCCCCCHHHHHHHHHHHHHHHHHHHCCCCCCC T ss_conf 2043210235489999996448996221-7-7268999999999999845897457899999999999999861551147 Q ss_pred CCCCCCCEEEEC--CCCCCCCHHHHHHHHHHCCEEEECCCCCCCCCCCCCCCCCCCCCHHHHHCCCCHHHHHHHHHHHHH Q ss_conf 458889812631--665567679999988856718803789989999888985122466673079998999999999999 Q gi|254780349|r 316 SGGTDNHLMLVD--LRSKRMTGKRAESILGRVSITCNKNSIPFDPESPFITSGIRLGTPSGTTRGFKEKDFEYIGELIAQ 393 (433) Q Consensus 316 ~ggTd~H~vlvd--l~~~~~~G~~a~~~Le~~gI~~Nkn~iP~D~~~~~~~sGiRlGT~aiTtrG~~e~em~~iA~li~~ 393 (433) T Consensus 293 ~~~~~sPIItsF~~P~~~~y~F~~fY~~lk~~GFviY----PGK---vs~~~~FRiG~I----G~V~~~di~~l~~~I~~ 361 (366) T TIGR02326 293 DDELQSPIITSFYSPEDPDYRFADFYQRLKEQGFVIY----PGK---VSQVDTFRIGNI----GDVDAADIERLVTAIGK 361 (366) T ss_pred CHHHCCCEEEEEECCCCCCCHHHHHHHHHHHCCCEEC----CCC---CCCCCCEECCCC----CCCCHHHHHHHHHHHHH T ss_conf 5434588689850778897138999999976781762----761---045662111676----76388999999999998 Q ss_pred HHH Q ss_conf 960 Q gi|254780349|r 394 ILD 396 (433) Q Consensus 394 ~L~ 396 (433) T Consensus 362 ~~~ 364 (366) T TIGR02326 362 ALY 364 (366) T ss_pred HHH T ss_conf 750

HHsearch alignment for GI: 254780349 and conserved domain: TIGR02326