HHsearch alignment for GI: 254780900 and conserved domain: cd04901

>cd04901 ACT_3PGDH C-terminal ACT (regulatory) domain of D-3-Phosphoglycerate Dehydrogenase (3PGDH) found in fungi and bacteria. The C-terminal ACT (regulatory) domain of D-3-Phosphoglycerate Dehydrogenase (3PGDH) found in fungi and bacteria. 3PGDH is an enzyme that belongs to the D-isomer specific, 2-hydroxyacid dehydrogenase family and catalyzes the oxidation of D-3-phosphoglycerate to 3- phosphohydroxypyruvate, which is the first step in the biosynthesis of L-serine, using NAD+ as the oxidizing agent. In Escherichia coli, the SerA 3PGDH is feedback-controlled by the end product L-serine in an allosteric manner. In the homotetrameric enzyme, the interface at adjacent ACT (regulatory) domains couples to create an extended beta-sheet. Each regulatory interface forms two serine-binding sites. The mechanism by which serine transmits inhibition to the active site is postulated to involve the tethering of the regulatory domains together to create a rigid quaternary structure with a solvent-
Probab=96.53  E-value=0.0055  Score=41.00  Aligned_cols=62  Identities=16%  Similarity=0.236  Sum_probs=41.1

Q ss_pred             EECCCCCHHHHHHHHHHHCCCCEEEEEECCCCCCCCEEEEEEEEEECCHHHHHHHHHHHHCCCCCCCC
Q ss_conf             92488874899999988669957888822677877613599992104889999999986238300047
Q gi|254780900|r  359 TIRNFEGILDKITSQMSDFNISLRLFSCPHQEENSQEFSVFMITHKVSGKLIRDAIECFNGKSDAIRY  426 (438)
Q Consensus       359 ~v~DkpGVLa~It~ilak~~ISIesi~Q~~~~~~~~~~~IViiTh~~~e~~i~~ai~~i~~l~~v~~~  426 (438)
T Consensus         5 ih~NvPG~l~~I~~il~~~~iNI~~m~~~---srg~~ay~vidvd~~---~~~~~~~~l~~i~gvi~v   66 (69)
T cd04901           5 IHKNVPGVLGQINTILAEHNINIAAQYLQ---TRGEIGYVVIDIDSE---VSEELLEALRAIPGTIRV   66 (69)
T ss_pred             EECCCCCHHHHHHHHHHHCCCCHHHHCCC---CCCCEEEEEEEECCC---CCHHHHHHHHCCCCEEEE
T ss_conf             71698868999999999859997997242---689768999990798---989999999729985999