HHsearch alignment for GI: 254780900 and conserved domain: cd04921

>cd04921 ACT_AKi-HSDH-ThrA-like_1 ACT domains of the bifunctional enzyme aspartokinase (AK) - homoserine dehydrogenase (HSDH). This CD includes the first of two ACT domains of the bifunctional enzyme aspartokinase (AK) - homoserine dehydrogenase (HSDH). The ACT domains are positioned between the N-terminal catalytic domain of AK and the C-terminal HSDH domain found in bacteria (Escherichia coli (EC) ThrA) and higher plants (Zea mays AK-HSDH). AK and HSDH are the first and third enzymes in the biosynthetic pathway of the aspartate family of amino acids. AK catalyzes the phosphorylation of Asp to P-aspartyl phosphate. HSDH catalyzes the NADPH-dependent conversion of Asp 3-semialdehyde to homoserine. HSDH is the first committed reaction in the branch of the pathway that leads to Thr and Met. In E. coli, ThrA is subject to allosteric regulation by the end product L-threonine and the native enzyme is reported to be tetrameric. As with bacteria, plant AK and HSDH are feedback inhibited by pat
Probab=92.82  E-value=0.44  Score=27.60  Aligned_cols=52  Identities=21%  Similarity=0.261  Sum_probs=39.4

Q ss_pred             ECCCCCHHHHHHHHHHHCCCCEEEEEECCCCCCCCEEEEEEEEEECCHHHHHHHHHHHHC
Q ss_conf             248887489999998866995788882267787761359999210488999999998623
Q gi|254780900|r  360 IRNFEGILDKITSQMSDFNISLRLFSCPHQEENSQEFSVFMITHKVSGKLIRDAIECFNG  419 (438)
Q Consensus       360 v~DkpGVLa~It~ilak~~ISIesi~Q~~~~~~~~~~~IViiTh~~~e~~i~~ai~~i~~  419 (438)
T Consensus        11 m~~~~GvaariF~~La~~~INI~mIsQ~sS---E~sIs~-----vV~~~d~~~Av~aL~~   62 (80)
T cd04921          11 MVGVPGIAARIFSALARAGINVILISQASS---EHSISF-----VVDESDADKALEALEE   62 (80)
T ss_pred             CCCCCCHHHHHHHHHHHCCCCEEEEECCCC---CCEEEE-----EECHHHHHHHHHHHHH
T ss_conf             689974899999999987997899973787---656999-----9818999999999999