>cd03671 Ap4A_hydrolase_plant_like Diadenosine tetraphosphate (Ap4A) hydrolase is a member of the Nudix hydrolase superfamily. Members of this family are well represented in a variety of prokaryotic and eukaryotic organisms. Phylogenetic analysis reveals two distinct subgroups where plant enzymes fall into one group (represented by this subfamily) and fungi/animals/archaea enzymes fall into another. Bacterial enzymes are found in both subfamilies. Ap4A is a potential by-product of aminoacyl tRNA synthesis, and accumulation of Ap4A has been implicated in a range of biological events, such as DNA replication, cellular differentiation, heat shock, metabolic stress, and apoptosis. Ap4A hydrolase cleaves Ap4A asymmetrically into ATP and AMP. It is important in the invasive properties of bacteria and thus presents a potential target for the inhibition of such invasive bacteria. Besides the signature nudix motif (G[X5]E[X7]REUXEEXGU where U is Ile, Leu, or Val), Ap4A hydrolase is structurally

Probab=100.00 E-value=4.3e-40 Score=253.90 Aligned_cols=142 Identities=44% Similarity=0.799 Sum_probs=125.0 Q ss_pred CCCCEEEEEEECCCCCEEEEEECCCCCCCCCCCCCCCCCCCCCCCCHHHHHHHHHHHHHCCCCCCCC--CCCCCCEEECC Q ss_conf 9566069999848983999992688776668722012115078888889999999998375522222--01366124116 Q gi|254780557|r 1 MYRRGVGILILNQDDLVWVGRRCFHDNNKHLSLWQMPQGGINPQEDPLDAAYRELYEETGIKSISLL--GQGDSYIQYDF 78 (160) Q Consensus 1 ~yR~~V~vvi~n~~~~iLl~kR~~~~~~~~~g~W~~PgG~ve~gEt~~~Aa~REl~EEtGi~~~~~~--~~~~~~~~~~~ 78 (160) T Consensus 1 ~YR~~Vg~vi~n~~~~vl~~~R~~~~-----~~W~~P~G~i~~gE~~~~aa~RE~~EEtGl~~~~~~~~~~~~~~~~Y~~ 75 (147) T cd03671 1 PYRPNVGVVLFNEDGKVFVGRRIDTP-----GAWQFPQGGIDEGEDPEQAALRELEEETGLDPDSVEIIAEIPDWLRYDL 75 (147) T ss_pred CCCCEEEEEEEECCCEEEEEEECCCC-----CCCCCCEEEECCCCCHHHHHHHHHHHHHCCCCCCCHHHHHHCCCEEEEC T ss_conf 99877899999289949999968998-----8887980024799999999999999986966231355564027358607 Q ss_pred CCCCC---CCCCCCCCCCEEEEEEECCCCCCEECCCCCCCCCCCCCEEEECCHHHHHHCCHHCCHHHHHHHHHHH Q ss_conf 32220---0001123443379999804754301057888888860037603789976300001379999999999 Q gi|254780557|r 79 PAHCI---QENGYVGQMQKWFAFRFQGLTSEICVDRTAYGYESEFDAWTWVSLWDTPNIVVDFKKEAYRQVVADF 150 (160) Q Consensus 79 ~~~~~---~~~~~~~~~~~~~~~~~~~~~~~i~~~~~~~~~~~E~~~~~Wv~~~el~~~i~~fk~~vy~~~l~~l 150 (160) T Consensus 76 P~~~~~~~~~~~~~GQ~Qkwfl~~~~g~d~~I~l~~~---~~~EF~~wrW~~~~e~~~~vv~FKr~vY~~vl~eF 147 (147) T cd03671 76 PPELKLKIWGGRYRGQEQKWFLFRFTGDDSEIDLNAP---EHPEFDEWRWVPLEELPDLIVPFKRPVYEAVLKEF 147 (147) T ss_pred HHHHHHCCCCCCCCCCEEEEEEEEEECCCCCCCCCCC---CCCCEEEEEECCHHHHHHHCCHHHHHHHHHHHHHC T ss_conf 2665430146645797879999998779650767999---99874564878889976755254199999999759

HHsearch alignment for GI: 254780557 and conserved domain: cd03671