>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=98.01 E-value=0.00071 Score=46.35 Aligned_cols=306 Identities=19% Similarity=0.291 Sum_probs=163.1 Q ss_pred HHHHHHHHHHHHHCCHHCCCCCCH-HHHHHHHHHHHHCCC--C-CCCEEECCCCCCHHHHHHHHHHHCCCCCCCC--C-C Q ss_conf 999999999985220102456897-899999999972037--8-6411102654202567777643001334433--2-1 Q gi|254780488|r 60 IIMNAIRSASENYDQIIFSEYTHE-PAEQLARLLIKIAPL--G-LQYVFFSDSGSTSIEVALKMALGFFNNNNMP--R-N 132 (423) Q Consensus 60 ~i~~a~~~q~~~~~~~~~~~~~~~-~~~~la~~l~~~~p~--~-~~~v~f~~SGsEA~e~Alklar~~~~~~~~~--r-~ 132 (423) T Consensus 17 ~vk~aM----l-~D~CtWD~dYn~~~~~~ir~~L~~la~~~~~~YT~VllQGSGtf~VEA~iGs~--------~pr~~~k 83 (366) T TIGR02326 17 TVKEAM----L-VDWCTWDSDYNEDVVESIRQKLLKLATAEEEKYTTVLLQGSGTFAVEAVIGSA--------VPRKDGK 83 (366) T ss_pred HHHHHH----H-CCCCCCCHHHHHHHHHHHHHHHHHHHHCCCCCEEEEEECCCCHHHHHHHHHCC--------CCCCCCE T ss_conf 888866----2-10458715531367999999999986068985467861275125556654112--------4788973 Q ss_pred EEEEEECCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCEECCCCCCCCCCCCHHHHHCCCCC----EEEEECCCCCCCCC Q ss_conf 13432025665321123432233333322234454210001222222211110122127751----13431165543211 Q gi|254780488|r 133 KIVVMEHGYHGDTIGSMSVSMRGAFNNSYEPLLFDVETIPFPHHNEEQKTLDDLEKHCSTQK----IAAFLVEPLILGAG 208 (423) Q Consensus 133 ~ii~~~~~yHG~t~~a~s~s~~~~~~~~~~p~~~~~~~i~~~~~~~~~~~l~~l~~~~~~~~----iaavi~EP~i~~~g 208 (423) T Consensus 84 lLv~~NGAY-G~R~~~ia~-------------~l~i~~~~~~~~E~~~~~~~~ve~~L~~dp~ItH~A~vHcETt---T- 145 (366) T TIGR02326 84 LLVVINGAY-GKRIAQIAE-------------YLQIPHHVVETEENEPTNVVEVEAILAADPAITHVALVHCETT---T- 145 (366) T ss_pred EEEEECCCH-HHHHHHHHH-------------HHCCCEEEEECCCCCCCCHHHHHHHHHCCCCCEEEEEEECCCC---C- T ss_conf 899717853-478999999-------------8478616751587777788999999851897127889836752---6- Q ss_pred CCCCCCCCCCCEEECCCCCCCCEECCCCCCCCCCCCCCCCCCCCCCCCCCEE--ECCCCCCCCCCC-CCCCCCCHH---- Q ss_conf 2222333211001101112342000122124444555431122334444202--013443322234-443322401---- Q gi|254780488|r 209 GMQTYRPYILKEFMRITKKYDTLLIADEVMTGWGRTGKIFACNHADITPDIL--CLSKGITGGALP-LAATLCSEE---- 281 (423) Q Consensus 209 G~~~~~~~~l~~lr~lc~~~g~llI~DEV~tG~GRtG~~~a~~~~gi~PDi~--~~gK~l~gG~~p-isav~~~~~---- 281 (423) T Consensus 146 GiLNP----i~~~~~~~~~hGk~~ivDA-MSSfGgi~----idi~~l~~D~LIssanKCi~G--VPGfgFviA~~~~L~~ 214 (366) T TIGR02326 146 GILNP----IEAVAKVAKRHGKVTIVDA-MSSFGGIP----IDIAELDIDYLISSANKCIQG--VPGFGFVIAKQAELEK 214 (366) T ss_pred CCCCH----HHHHHHHHHHCCCEEEEEC-CCCCCCCH----HHHHHHCCCEEEECCCCCCCC--CCCHHHHHHHHHHHHH T ss_conf 62112----8999999985597799853-41137600----116432567635234781337--6843667768999986 Q ss_pred -----------HHHHHC----CCCCCCCCCCCCCCCCCCCCHHHHHCCHHHCCCCC-CCCCCC---CHHHHHHHHHHHHH Q ss_conf -----------321000----12222222233333222210011000000000112-332221---00267898999975 Q gi|254780488|r 282 -----------IFDSHL----SSDKKKTFFHSSSYTANPIACAAALANLQIWEKEP-VIERIK---NLERMHADRLSLLK 342 (423) Q Consensus 282 -----------i~~~~~----~~~~~~~~~h~~T~~gnpl~~aaa~a~L~~i~~~~-l~~~~~---~~g~~l~~~l~~L~ 342 (423) T Consensus 215 ~~g~arSLsLDLydQw~~M~~~~GkWR--FTsPTHv-----V~Af~qAL~el~~EGGv~aR~~RY~~nq~~L~~~m~~LG 287 (366) T TIGR02326 215 CAGNARSLSLDLYDQWECMEKQHGKWR--FTSPTHV-----VHAFAQALLELEKEGGVEARYQRYQSNQKLLVAGMRALG 287 (366) T ss_pred HCCCCCHHHHHHHHHHHHHHCCCCCEE--ECCCHHH-----HHHHHHHHHHHHHCCCCCHHHHHHHHHHHHHHHHHHHCC T ss_conf 204321023548999999644899622--1772689-----999999999998458974578999999999999998615 Q ss_pred HCCCEEEECCCCCEEEEEECCCC-CCCCCHHHHHHHHHHHHCCEEEEECC----CEEEECCCCCCCHHHHHHHHHHHHHH Q ss_conf 18977777455339999970687-66641068999999997885999519----98995689878799999999999999 Q gi|254780488|r 343 SNKKFVNIRQMGTIVALDFNVQN-KGYFFDKNAKLKNFFREKKILIRPLG----HIMYLMPPYCITATDLDHIYNTINEA 417 (423) Q Consensus 343 ~~~~v~~vrG~Gl~~~iel~~~~-~~~~~~~~~~l~~~l~~~Gil~~~~g----n~i~l~Ppl~it~~eId~~l~~l~~a 417 (423) T Consensus 288 F~~ll~~-~~~sPI-ItsF~~P~~~~y---~F~~fY~~lk~~GFviYPGKvs~~~~FRiG~IG~V~~~di~~l~~~I~~~ 362 (366) T TIGR02326 288 FEPLLDD-ELQSPI-ITSFYSPEDPDY---RFADFYQRLKEQGFVIYPGKVSQVDTFRIGNIGDVDAADIERLVTAIGKA 362 (366) T ss_pred CCCCCCH-HHCCCE-EEEEECCCCCCC---HHHHHHHHHHHCCCEECCCCCCCCCCEECCCCCCCCHHHHHHHHHHHHHH T ss_conf 5114754-345886-898507788971---38999999976781762761045662111676763889999999999987 Q ss_pred HH Q ss_conf 98 Q gi|254780488|r 418 VD 419 (423) Q Consensus 418 L~ 419 (423) T Consensus 363 ~~ 364 (366) T TIGR02326 363 LY 364 (366) T ss_pred HH T ss_conf 50

HHsearch alignment for GI: 254780488 and conserved domain: TIGR02326