HHsearch alignment for GI: 254780859 and conserved domain: TIGR01553

>TIGR01553 formate-DH-alph formate dehydrogenase, alpha subunit; InterPro: IPR006443 This family of sequences describe a subset of formate dehydrogenase alpha chains found mainly in proteobacteria but also in Aquifex aeolicus. The alpha chain contains domains for molybdopterin dinucleotide binding and molybdopterin oxidoreductase. The holo-enzyme also contains beta and gamma subunits of 32 and 20 kDa. The enzyme catalyzes the oxidation of formate (produced from pyruvate during anaerobic growth) to carbon dioxide with the concomitant release of two electrons and two protons. The electrons are utilised mainly in the nitrate respiration by nitrate reductase . In Escherichia coli and Salmonella typhi, there are two forms of the formate dehydrogenase, one induced by nitrate which is strictly anaerobic (fdn), and one incuced during the transition from aerobic to anaerobic growth (fdo). This subunit is one of only three proteins in Escherichia coli which contain selenocysteine .; GO: 0008863 formate dehydrogenase activity, 0045333 cellular respiration, 0005737 cytoplasm.
Probab=90.72  E-value=0.17  Score=29.73  Aligned_cols=75  Identities=19%  Similarity=0.228  Sum_probs=45.3

Q ss_pred             CCCCCCCCCCCCCCHHCCCCCCCCCCCH----HHHHHCCCEEEECCCCHHH-----------CC-CCCCEEEHHHHHHHH
Q ss_conf             7542467531045210177658652368----8886016759980764220-----------16-654345022116666
Q gi|254780859|r  488 GFAVLHTVASRVGALDLGFVPADDTINA----MNILDKTDIVFLLGADELD-----------FS-DKQALTVYIGSHGDR  551 (700)
Q Consensus       488 G~~~L~~~~n~~Ga~d~g~~P~~~~~~~----~~~~~~~~~l~~~g~d~l~-----------~~-~~~~fvV~~d~~~t~  551 (700)
T Consensus       194 Gl~~~e~QA~i~H~pTVAsLApsfGRGAMTNnWvDikNsdli~v~GgNPAEnHP~gFkWai~Akek~GAkiI~iDPRfnR  273 (1043)
T TIGR01553       194 GLVAVENQARICHAPTVASLAPSFGRGAMTNNWVDIKNSDLILVMGGNPAENHPVGFKWAIKAKEKKGAKIIVIDPRFNR  273 (1043)
T ss_pred             CCHHHHCCCCCCCCCCHHHHCCCCCCCCCCCCEEEEECCCEEEECCCCCCCCCCCCCEEHHHHHCCCCCEEEEECCCCCC
T ss_conf             62121103602343315543155576664255141103668897177872026765100221111378779997889871


Q ss_pred             HHHHCCEEECC
Q ss_conf             88745577047
Q gi|254780859|r  552 GAQSADVILPG  562 (700)
Q Consensus       552 tA~~ADVVLP~  562 (700)
T Consensus       274 Ta~vaDl~api  284 (1043)
T TIGR01553       274 TAAVADLYAPI  284 (1043)
T ss_pred             CHHHCEEEEEC
T ss_conf             01001133216