HHsearch alignment for GI: 254781031 and conserved domain: cd01999

>cd01999 Argininosuccinate_Synthase Argininosuccinate synthase. The Argininosuccinate synthase is a urea cycle enzyme that catalyzes the penultimate step in arginine biosynthesis: the ATP-dependent ligation of citrulline to aspartate to form argininosuccinate, AMP and pyrophosphate . In humans, a defect in the AS gene causes citrullinemia, a genetic disease characterized by severe vomiting spells and mental retardation. AS is a homotetrameric enzyme of chains of about 400 amino-acid residues. An arginine seems to be important for the enzyme's catalytic mechanism. The sequences of AS from various prokaryotes, archaebacteria and eukaryotes show significant similarity
Probab=99.07  E-value=6.5e-09  Score=74.33  Aligned_cols=157  Identities=17%  Similarity=0.132  Sum_probs=83.2

Q ss_pred             EEEEEECCHHHHHHHHHHHHCC-CEEEEEEEECCCCCCCCHHHHHHHHHHHHHHHHHHHHCCCCCEEEECHHHCCCCCCC
Q ss_conf             8999809656999999999749-839999976778877727999999999999988875203561587501103224443
Q gi|254781031|r   11 ALLLFSGGQDSSTCLSWALDRF-DRVETLSFDYGQRNKVELECRLCVRKKIVELMPKWKDSLGEDHILPLAILGDISHSS   89 (240)
Q Consensus        11 av~l~SGGlDS~~~l~~l~~~~-~~v~~i~~~ygq~~~~~~~~a~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~   89 (240)
T Consensus         1 VvLAySGGLDTSv~l~wL~e~~~~eVia~~~d~Gq~~e-~~~~---i~~k----A~~~GA~--~~~v~D~r~ef~~~~i~   70 (385)
T cd01999           1 VVLAYSGGLDTSVILKWLKEKGGYEVIAVTADVGQPEE-EIEA---IEEK----ALKLGAK--KHVVVDLREEFVEDYIF   70 (385)
T ss_pred             CEEEECCCCHHHHHHHHHHHHCCCEEEEEEEECCCCHH-HHHH---HHHH----HHHHCCC--EEEEECHHHHHHHHHHH
T ss_conf             97997788179999999997459849999998999667-7789---9999----9981997--89996129999999999


Q ss_pred             CCCCHHHHHCCCCCCHHHHHHHHHHHHHHHHHHHHHCCCCEEECCCCCCCCCCCCCCCHH-HHHHHHHHHHHCCCCCEEE
Q ss_conf             322201100012331011111112233377777743399365114544443455544302-4777776775306432167
Q gi|254781031|r   90 LTKNVAMKIQDNNLPNTFVPGRNIIFLVFAATLAYRLGITNIVIGVCETDYSGYPDCRHD-TIRAIETAINLGMESHVTV  168 (240)
Q Consensus        90 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~a~~~g~~~i~~~~~~~~~~~~~~~~~~-~~~~~~~~~~~~~~~~~~i  168 (240)
T Consensus        71 pai~ana~Yeg--~Y~L~tslaRplIak~~ve~A~~~ga~aiaHG~TGkG------NDQvRFe~~~-----~aL~P~l~i  137 (385)
T cd01999          71 PAIQANALYEG--TYPLGTALARPLIAKALVEVAKEEGADAVAHGCTGKG------NDQVRFELAF-----YALNPDLKI  137 (385)
T ss_pred             HHHHHCCCCCC--CEECCCCHHHHHHHHHHHHHHHHHCCEEEEECCCCCC------CCHHHHHHHH-----HHHCCCCEE
T ss_conf             99960864337--5321350157899999999999809849974566688------8406899999-----985999758


Q ss_pred             EEEECC---CCHHHHHHHHHHHCCC
Q ss_conf             753138---9889999999982820
Q gi|254781031|r  169 HTPLMW---LKKYETWKLAQDIGGQ  190 (240)
Q Consensus       169 ~~P~~~---~tK~eI~~~~~~~~~~  190 (240)
T Consensus       138 iAP~Rd~~~~sR~~~i~ya~~~gi~  162 (385)
T cd01999         138 IAPWRDWEFLSREEEIEYAEEHGIP  162 (385)
T ss_pred             EEEEECCCCCCHHHHHHHHHHCCCC
T ss_conf             5147314448889999999985999