>cd03026 AhpF_NTD_C TRX-GRX-like family, Alkyl hydroperoxide reductase F subunit (AhpF) N-terminal domain (NTD) subfamily, C-terminal TRX-fold subdomain; AhpF is a homodimeric flavoenzyme which catalyzes the NADH-dependent reduction of the peroxiredoxin AhpC, which then reduces hydrogen peroxide and organic hydroperoxides. AhpF contains an NTD containing two contiguous TRX-fold subdomains similar to Pyrococcus furiosus protein disulfide oxidoreductase (PfPDO). It also contains a catalytic core similar to TRX reductase containing FAD and NADH binding domains with an active site disulfide. The proposed mechanism of action of AhpF is similar to a TRX/TRX reductase system. The flow of reducing equivalents goes from NADH - catalytic core of AhpF - NTD of AhpF - AhpC - peroxide substrates. The catalytic CXXC motif of the NTD of AhpF is contained in its C-terminal TRX subdomain.

Probab=92.44  E-value=0.19  Score=29.16  Aligned_cols=31  Identities=29%  Similarity=0.522  Sum_probs=23.3

Q ss_pred             HHHHHCCCCCCCEEEECCEEE-CCCCCHHHHH
Q ss_conf             999861885365799898996-1899999999
Q gi|254780477|r  189 RASEDFAIDSTPVFFIGGNLY-LGDMSEGVFS  219 (232)
Q Consensus       189 ~~~~~~gi~gTPt~~VnG~~~-~g~~~~~~~~  219 (232)
T Consensus        56 d~~~~~~ImsVP~vviN~e~~~~G~~~~~ell   87 (89)
T cd03026          56 DEVEERGIMSVPAIFLNGELFGFGRMTLEEIL   87 (89)
T ss_pred             HHHHHCCCCCCCEEEECCEEEEECCCCHHHHH
T ss_conf             89997596448979999967740651599894