>TIGR01422 phosphonatase phosphonoacetaldehyde hydrolase; InterPro: IPR006323 These sequences represent an enzyme that catalyzes the cleavage of the carbon phosphorous bond of a phosphonate. The mechanism depends on the substrate having a carbonyl one carbon away from the cleavage position. This enzyme is a member of the Haloacid Dehalogenase (HAD) superfamily of aspartate-nucleophile hydrolases, and contains a modified version of the conserved catalytic motifs of that superfamily: the first motif is usually DxDx(T/V), here it is DxAxT, and in the third motif the normal conserved lysine is instead an arginine. Additionally, the enzyme contains a unique conserved catalytic lysine (B. cereus pos. 53) which is involved in the binding and activation of the substrate through the formation of a Schiff base . The substrate of this enzyme is the product of 2-aminoethylphosphonate (AEP) transaminase, phosphonoacetaldehyde. This degradation pathway for AEP may be related to its toxic properties which are utilised by microorganisms as a chemical warfare agent..

Probab=95.67 E-value=0.044 Score=33.92 Aligned_cols=183 Identities=19% Similarity=0.254 Sum_probs=93.7 Q ss_pred EEEEECCCEEEECCCCCCCHHHHHHHHHH-CCCCEEEECCCCCCHHHHHHHHHHCCCCCHHCCCCCCHHHHHHHHHHHHC Q ss_conf 99992744323188148627999999998-79819998598999589999875127770000135687999999998531 Q gi|254780847|r 17 VILCDVWGVLHNGQKFLPGTIPALKEARE-NGLKVILFTNSPRPSASVISQIQSLGSSSQFWDDIITSGDLTHHLLVEES 95 (282) Q Consensus 17 ~~lfD~DGvL~~g~~~ipgA~e~l~~L~~-~g~~~~~lTN~s~~~~~~~~~L~~lG~~~~~~d~I~ts~~~~~~~l~~~~ 95 (282) T Consensus 1 AvIfDWAGT~VDfGsFAP~~i-FvE~F~~Gfgv~i-----------sleEAR~PMGlg--K~dHiral~~~--P~iA~rw 64 (199) T TIGR01422 1 AVIFDWAGTVVDFGSFAPTEI-FVEAFKKGFGVEI-----------SLEEARKPMGLG--KWDHIRALTEL--PRIAERW 64 (199) T ss_pred CEEECCCCCEEECCCCCHHHH-HHHHHHCCCCEEE-----------EHHHCCCCCCCC--HHHHHHHHHHH--HHHHHHH T ss_conf 933304676331577562688-9987513787077-----------466516887763--68999998630--2899999 Q ss_pred CCCCC-CCC----CCHHHHHHCCCCCCCCCCCCCCEEEEECCCCCCCCHHHHHHHHHHHHHCCCCEEECCCCCCCCCCCC Q ss_conf 65454-387----2521243117973157556786899843771001179999999999730574031266432256630 Q gi|254780847|r 96 HNIFF-IGP----QRDYALLEKLNIKIVNEQHAETILCTGLYDDEKDKTEDYRMLLERFAHRHIPLICANPDIVANRGNK 170 (282) Q Consensus 96 ~~v~v-iG~----~~~~~~l~~~g~~~~~~~~~~~iv~~g~~~~~~~~~~~~~~l~~~~~~~~~~~i~~N~D~~~p~~~~ 170 (282) T Consensus 65 ~~vFgrlp~~~Di~aiYe~F~pl~ia~~a~haa--------------pIp~~levia~lR~rGiKIGScs---GYpr~-- 125 (199) T TIGR01422 65 RRVFGRLPTEADIQAIYEEFMPLQIAKVAEHAA--------------PIPAVLEVIAELRERGIKIGSCS---GYPRE-- 125 (199) T ss_pred HHHCCCCCCHHHHHHHHHHHHHHHHHHHHHHCC--------------CCHHHHHHHHHHHHCCCEEECCC---CCHHH-- T ss_conf 997089997745899998616899998655405--------------55368999999973884442479---87578-- Q ss_pred HHHHHHHHHHHHHHHCC-CCC---------CCCCCCCHHHHHHHHHHHHHHCCCCCCCEEEECCCHHHHHHHHHHCCCCE Q ss_conf 01104899998875047-653---------23477702589999986543148890008997388578899999769969 Q gi|254780847|r 171 IIPCAGALALIYQQLNG-IVK---------MIGKPHLPIYEMAFKKISSLCNSFNKKRILAIGDGMDTDIKGALQSGIDA 240 (282) Q Consensus 171 ~~~~~G~~~~~~~~~~g-~~~---------~~GKP~~~~~~~a~~~l~~~~~~~~~~~~lmIGD~l~tDI~gA~~~G~~s 240 (282) T Consensus 126 -vMd---~v~~~Aa~~GY~pD~vVatDdvpq~GRP~P~~---alkNvieL-Gv~dv~a~vKVdDt~p-gi~EGrnAGMWT 196 (199) T TIGR01422 126 -VMD---IVVAEAALQGYKPDFVVATDDVPQAGRPYPFM---ALKNVIEL-GVDDVNACVKVDDTLP-GIKEGRNAGMWT 196 (199) T ss_pred -HHH---HHHHHHHHCCCCCCEEECCCCCCCCCCCHHHH---HHHHHHHC-CCCCCCCEEECCCCCC-CHHHCCCCCCEE T ss_conf -999---99999974789766424662246788974789---99989870-7522100353267764-212021257400 Q ss_pred EEE Q ss_conf 997 Q gi|254780847|r 241 LYV 243 (282) Q Consensus 241 ilV 243 (282) T Consensus 197 Vgl 199 (199) T TIGR01422 197 VGL 199 (199) T ss_pred CCC T ss_conf 259

HHsearch alignment for GI: 254780847 and conserved domain: TIGR01422