HHsearch alignment for GI: 254780416 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=95.53 E-value=0.0028 Score=37.25 Aligned_cols=26 Identities=38% Similarity=0.836 Sum_probs=22.0
Q ss_pred EEEHHHCCCCCHHHHHHHHHHCCCCC
Q ss_conf 99401302577158787420025667
Q gi|254780416|r 34 AIHPDECIDCGVCEPECPVDAIKPDT 59 (113)
Q Consensus 34 ~id~~~Ci~Cg~C~~~CP~~AI~~d~ 59 (113)
T Consensus 695 ~W~~d~CiqCnqCa~VCPHaaIR~~l 720 (1194)
T TIGR02176 695 VWKSDNCIQCNQCAFVCPHAAIRPFL 720 (1194)
T ss_pred CCCCCCCCCCCCCCCCCCHHHHHHHH
T ss_conf 05656653478854337647877764