HHsearch alignment for GI: 254780960 and conserved domain: TIGR03351

>TIGR03351 PhnX-like phosphonatase-like hydrolase. This clade of sequences are the closest homologs to the PhnX enzyme, phosphonoacetaldehyde (Pald) hydrolase (phosphonatase, TIGR01422). This phosphonatase-like enzyme and PhnX itself are members of the haloacid dehalogenase (HAD) superfamily (pfam00702) having a a number of distinctive features that set them apart from typical HAD enzymes. The typical HAD N-terminal motif DxDx(T/V) here is DxAGT and the usual conserved lysine prior to the C-terminal motif is instead an arginine. Also distinctive of phosphonatase, and particular to its bi-catalytic mechanism is a conserved lysine in the variable "cap" domain. This lysine forms a Schiff base with the aldehyde of phosphonoacetaldehyde, providing, through the resulting positive charge, a polarization of the C-P bond necesary for cleavage as well as a route to the initial product of cleavage, an ene-amine. The conservation of these elements in this phosphonatase-like enzyme suggests that the
Probab=99.44  E-value=4.9e-12  Score=92.45  Aligned_cols=191  Identities=18%  Similarity=0.250  Sum_probs=112.8

Q ss_pred             CEEEECCCEEEEECCCC-----HHHHHHHHCCCHHHHHHHHHHHCCCCCHHHHHHHHHH----------HHHHHHHHHHH
Q ss_conf             44872275026524520-----0278874122327788876520244100123455687----------64200456898
Q gi|254780960|r   81 NLLIADMDSTMIEQECI-----DELADLIGIKEKVSLITARAMNGEIPFQDSLRERISL----------FKGTSTKIIDS  145 (297)
Q Consensus        81 ~l~~~d~d~tli~~~~l-----~~~a~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~----------~~~~~~~~~~~  145 (297)
T Consensus         2 kaViFD~DGTLvDs~~~~~~a~~~~~~~~G~~~~~~~~~~~~~G--~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~   79 (220)
T TIGR03351         2 SLVVLDMAGTTVDEDGLVYRALRQAVTAAGLSPTPEEVQSAWMG--QSKIEAIRALLALDGADEAEAQAAFADFEERLAE   79 (220)
T ss_pred             EEEEEECCCCHHHCHHHHHHHHHHHHHHCCCCCCHHHHHHHHCC--CCHHHHHHHHHHHCCCCHHHHHHHHHHHHHHHHH
T ss_conf             79999387767758999999999999987889898999998359--9899999999876499989999999999999999


Q ss_pred             HHH-HHCCCCCCHHHHHHHHHHCCCEEEEEECCCHHHHHHHHHHHCCC--HHHHHCCCCHHHCCCCCCCCCCCCHHHHHH
Q ss_conf             874-21134543389999998419869998167234223226550864--134310100000000001563105211388
Q gi|254780960|r  146 LLE-KKITYNPGGYELVHTMKQNGASTLLVTGGFSIFARFIAQHLGFD--QYYANRFIEKDDRLTGQVMEPIIDGTAKSQ  222 (297)
Q Consensus       146 ~~~-~~~~~~~~~~~~i~~l~~~g~~v~iisg~~~~~~~~ia~~lgi~--~~~a~~~~~~~~~~~~~~~~~~~~~~~k~~  222 (297)
T Consensus        80 ~~~~~~~~~~pG~~elL~~L~~~gi~~av~T~~~~~~~~~~l~~~g~~~~~~fd~vv~~~d----------v~~~KP~Pd  149 (220)
T TIGR03351        80 AYDDGPPVALPGAEEAFRSLRSSGIKVALTTGFDRDTAERLLEKLGWTVGDDVDAVVCPSD----------VAAGRPAPD  149 (220)
T ss_pred             HHHCCCCEECCCHHHHHHHHHHCCCCEEEECCCCHHHHHHHHHHHCCCHHHHCCCCCCCCC----------CCCCCCCHH
T ss_conf             9861898067119999999998799776635997799999999827640432240456343----------566798789


Q ss_pred             HHHHHHHHHCCC-CCEEEEEECCCCHHHHHHHCCCE--EEE--C--CCHHHH-HHCCEEEECCCHHHHHHH
Q ss_conf             775323310377-66799997892348899848931--898--7--957899-858989956983276787
Q gi|254780960|r  223 ILLEAIQKLQIN-PEDTIAVGDGNNDLDMLRVAGYG--VAF--H--AKPALA-KQAKIRIDHSDLEALLYI  285 (297)
Q Consensus       223 ~~~~l~~~~~~~-~~~v~avGDg~ND~pmL~~AgvG--VA~--~--a~~~v~-~~Ad~~~~~~dl~~~l~~  285 (297)
T Consensus       150 ~~l~a~~~lg~~~~~~~~vigDs~~di~aA~~AG~~~~igv~~G~~~~~~L~~~gad~v~~--~~~eL~~~  218 (220)
T TIGR03351       150 LILRAMELTGVQDVQSVAVAGDTPNDLEAGINAGAGAVVGVLTGAHDAEELSRHPHTHVLD--SVADLPAL  218 (220)
T ss_pred             HHHHHHHHHCCCCCCCEEECCCCHHHHHHHHHCCCCEEEEEECCCCCHHHHHHCCCCEEEC--CHHHHHHH
T ss_conf             9999999958896433135378788999999859987999838999999998789999999--99999886