HHsearch alignment for GI: 254780861 and conserved domain: TIGR02176

>TIGR02176 pyruv_ox_red pyruvate:ferredoxin (flavodoxin) oxidoreductase; InterPro: IPR011895 The oxidative decarboxylation of pyruvate to acetyl-CoA, a central step in energy metabolism, can occur by two different mechanisms . In mitochondria and aerobic bacteria this reaction is catalysed by the multienzyme complex pyruvate dehydrogenase using NAD as electron acceptor. In anaerobic organisms, however, this reaction is reversibly catalysed by a single enzyme using either ferrodoxin or flavodoxin as the electron acceptor. Pyruvate:ferrodoxin/flavodoxin reductases (PFORs) in this entry occur in both obligately and facultatively anaerobic bacteria and also some eukaryotic microorganisms. These proteins are single-chain enzymes containing a thiamin pyrophosphate cofactor for the cleavage of carbon-carbon bonds next to a carbonyl group, and iron-sulphur clusters for electron transfer. The Desulfovibrio africanus enzyme is currently the only PFOR whose three dimensional structure is known , . It is a homodimer where each subunit contains one thiamin pyrophosphate cofactor and two ferrodoxin-like 4Fe-S clusters and an atypical 4Fe-S cluster. Each monomer is composed of seven domains - domains I, II and VI make intersubunit contacts, while domains III, IV and V are located at the suface of the dimer, and domain VII forms a long arm extending over the other subunit. The cofactor is bound at the interface of domains I and VI and is proximal to the atypical 4Fe-S bound by domain VI, while the ferrodoxin-like 4Fe-S clusters are bound by domain V. Comparison of this enzyme with the multi-chain PFORs shows a correspondance between the domains in this enzyme and the subunits of the multi-chain enzymes.; GO: 0005506 iron ion binding, 0016903 oxidoreductase activity acting on the aldehyde or oxo group of donors, 0006118 electron transport.
Probab=99.26  E-value=1.1e-12  Score=97.58  Aligned_cols=80  Identities=31%  Similarity=0.622  Sum_probs=53.8

Q ss_pred             CCCCEECCCCHHHHHHCCCCCCCCC-----CCCC--------CC---EEEEEEEEEHHHCCCCCCCHHHCCCC-------
Q ss_conf             7422134522325330883210122-----4544--------73---35778885055558688723337831-------
Q gi|254780861|r   60 EERCIACKLCEAICPAQAITIESGP-----RCHD--------GT---RRTVRYDIDMIKCIYCGLCQEACPVD-------  116 (163)
Q Consensus        60 ~ekCi~C~~C~~~CP~~aI~i~~~~-----~~~~--------~~---~~~~~~~id~~~Ci~Cg~Cv~vCP~~-------  116 (163)
T Consensus       698 ~d~CiqCnqCa~VCPHaaIR~~l~~~ee~~~AP~~F~~~d~kGK~~~g~kyrIQvs~~DCtGCglCvd~CPa~~K~~~~~  777 (1194)
T TIGR02176       698 SDNCIQCNQCAFVCPHAAIRPFLLDEEELEKAPEGFKSLDAKGKELEGLKYRIQVSVEDCTGCGLCVDICPAKDKEVEEG  777 (1194)
T ss_pred             CCCCCCCCCCCCCCCHHHHHHHHCCCHHHHCCCCCCEEECCCCCCCCCCCEEEEECCCCCCCCCCCCCCCCCCCCCCCCC
T ss_conf             56653478854337647877764271576358986477134367889870068742750357634203585888888876


Q ss_pred             -EEECCCCCCCCCCCHHHHCCCHHHHHH
Q ss_conf             -030367735675768773329999988
Q gi|254780861|r  117 -AIVEGPNFEFATETRQELYYDKERLLN  143 (163)
Q Consensus       117 -AI~~~~~~e~a~~~r~~l~~~k~~Ll~  143 (163)
T Consensus       778 KAL~M~p~----~e~~e~e~~Nw~f~~~  801 (1194)
T TIGR02176       778 KALVMKPL----EEQREEESANWEFAIN  801 (1194)
T ss_pred             CCCCCCCC----CHHHHHHHHHHHHHHH
T ss_conf             53036763----1126788788999973