HHsearch alignment for GI: 254780873 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=98.83  E-value=4.7e-09  Score=80.84  Aligned_cols=73  Identities=37%  Similarity=0.432  Sum_probs=60.1

Q ss_pred             CCHHCCC--CCCCCCCCCCHHHHHHHHCCCCEECCCCCCCCCCCCCCCEEECCHHHHHHHHHHHHHHHH----HCCCCEE
Q ss_conf             2000127--750004841000145541285011123443222233310121230247766887898886----0596158
Q gi|254780873|r  266 EAQISLR--RLRDHPGISASIFSPLAEAHINIDMIIQNVSEDGQYVDITFTTPSSSLEKALAVLSDNKE----NIGYDVI  339 (411)
Q Consensus       266 i~~Iti~--~~~~~~g~~a~If~~La~~~I~VdmI~qs~s~~~~~~~Isf~i~~~d~~~~~~~L~~~~~----~~~~~~I  339 (411)
T Consensus         1 valv~vvG~gm~~~~GvaariF~~La~~~INI~mIsQ~sSE~----sIs~vV~~~d~~~Av~aL~~~F~le~~~~~i~~i   76 (80)
T cd04921           1 VALINIEGTGMVGVPGIAARIFSALARAGINVILISQASSEH----SISFVVDESDADKALEALEEEFALEIKAGLIKPI   76 (80)
T ss_pred             CEEEEEECCCCCCCCCHHHHHHHHHHHCCCCEEEEECCCCCC----EEEEEECHHHHHHHHHHHHHHHHHHHHCCCCCCE
T ss_conf             979999788968997489999999998799789997378765----6999981899999999999999989972988844


Q ss_pred             EEE
Q ss_conf             974
Q gi|254780873|r  340 QHE  342 (411)
Q Consensus       340 ~~~  342 (411)
T Consensus        77 ~v~   79 (80)
T cd04921          77 EVE   79 (80)
T ss_pred             EEE
T ss_conf             764