HHsearch alignment for GI: 254780900 and conserved domain: cd04903

>cd04903 ACT_LSD C-terminal ACT domain of the L-serine dehydratase (LSD), iron-sulfur-dependent, beta subunit. The C-terminal ACT domain of the L-serine dehydratase (LSD), iron-sulfur-dependent, beta subunit, found in various bacterial anaerobes such as Clostridium, Bacillis, and Treponema species. These enzymes catalyze the deamination of L-serine, producing pyruvate and ammonia. Unlike the eukaryotic L-serine dehydratase, which requires the pyridoxal-5'-phosphate (PLP) cofactor, the prokaryotic L-serine dehydratase contains an [4Fe-4S] cluster instead of a PLP active site. The LSD alpha and beta subunits of the 'clostridial' enzyme are encoded by the sdhA and sdhB genes. The single subunit bacterial homologs of L-serine dehydratase (LSD1, LSD2, TdcG) present in Escherichia coli, and other enterobacterials, lack the ACT domain described here. Members of this CD belong to the superfamily of ACT regulatory domains.
Probab=97.30  E-value=0.00091  Score=46.45  Aligned_cols=66  Identities=14%  Similarity=0.271  Sum_probs=43.1

Q ss_pred             EEEEECCCCCHHHHHHHHHHHCCCCEEEEEECCCCCCCCEEEEEEEE-EECCHHHHHHHHHHHHCCCCCCCC
Q ss_conf             99992488874899999988669957888822677877613599992-104889999999986238300047
Q gi|254780900|r  356 IRLTIRNFEGILDKITSQMSDFNISLRLFSCPHQEENSQEFSVFMIT-HKVSGKLIRDAIECFNGKSDAIRY  426 (438)
Q Consensus       356 LRl~v~DkpGVLa~It~ilak~~ISIesi~Q~~~~~~~~~~~IViiT-h~~~e~~i~~ai~~i~~l~~v~~~  426 (438)
T Consensus         2 L~i~~~D~PG~Ig~i~~~L~~~~INIa~m~v~R-~~~g~~A~~ii~~D~~v~~~----~l~~i~~~~~I~~v   68 (71)
T cd04903           2 LIVVHKDKPGAIAKVTSVLADHEINIAFMRVSR-KEKGDQALMVIEVDQPIDEE----VIEEIKKIPNIHQV   68 (71)
T ss_pred             EEEEECCCCCCHHHHHHHHHHCCCCCHHEEEEC-CCCCCEEEEEEECCCCCCHH----HHHHHHCCCCCEEE
T ss_conf             899944869919999999986596803618751-58997899999928999999----99999759995699