>cd03019 DsbA_DsbA DsbA family, DsbA subfamily; DsbA is a monomeric thiol disulfide oxidoreductase protein containing a redox active CXXC motif imbedded in a TRX fold. It is involved in the oxidative protein folding pathway in prokaryotes, and is the strongest thiol oxidant known, due to the unusual stability of the thiolate anion form of the first cysteine in the CXXC motif. The highly unstable oxidized form of DsbA directly donates disulfide bonds to reduced proteins secreted into the bacterial periplasm. This rapid and unidirectional process helps to catalyze the folding of newly-synthesized polypeptides. To regain catalytic activity, reduced DsbA is then reoxidized by the membrane protein DsbB, which generates its disulfides from oxidized quinones, which in turn are reoxidized by the electron transport chain.

Probab=98.58 E-value=2.3e-07 Score=63.54 Aligned_cols=85 Identities=22% Similarity=0.579 Sum_probs=61.1 Q ss_pred HCCCCEEEEEECCCCHHHHHHHHHHHHHHHHCCCCCCCCCCCC------------------------------------- Q ss_conf 4899499998769970222134666654210001233322672------------------------------------- Q gi|254780822|r 17 ECSNPVVVDFWASWCRPCVKLSPIIDDIADELADKVKITKLDI------------------------------------- 59 (107) Q Consensus 17 ~~~~~vlv~f~a~wC~~C~~~~p~~~~l~~~~~~~i~~~~vd~------------------------------------- 59 (107) T Consensus 13 p~a~vtIvEf~dy~Cp~C~~~~~~l~~~~~~~~~~v~f~~~pv~~~~~~~~~~A~~~~~a~~~~~~~~~~~~~F~~~~~~ 92 (178) T cd03019 13 PSGKPEVIEFFSYGCPHCYNFEPILEAWVKKLPKDVKFEKVPVVFGGGEGEPLARAFYAAEALGLEDKLHAALFEAIHEK 92 (178) T ss_pred CCCCCEEEEEECCCCHHHHHHHHHHHHHHHHCCCCEEEEEEECCCCCCHHHHHHHHHHHHHHCCCHHHHHHHHHHHHHHH T ss_conf 99996799998888861688828999999847997599998556788358999999999998494878899999999985 Q ss_pred -------------------------------------CCCHHHHHHHCCCCCCEEEEEECCEEEEEEECCCCCHHHHHHH Q ss_conf -------------------------------------3265777762315688799997998985887489998999999 Q gi|254780822|r 60 -------------------------------------EESSEISTRYQISSIPTLILFKDGKVIDRMMPGASSQSDIIEW 102 (107) Q Consensus 60 -------------------------------------d~~~~l~~~~~v~~~Pt~~~~~~g~~~~~~~~g~~~~~~l~~~ 102 (107) T Consensus 93 ~~~~~~~~~l~~~a~~~Gld~~~f~~~~~s~~~~~~i~~~~~~a~~~gI~gTPtfiI--NGKy~i--~~~~~~~~~~~~~ 168 (178) T cd03019 93 RKRLLDPDDIRKIFLSQGVDKKKFDAAYNSFSVKALVAKAEKLAKKYKITGVPAFVV--NGKYVV--NPSAIGGDDTLQV 168 (178) T ss_pred HCCCCCHHHHHHHHHHCCCCHHHHHHHHCCHHHHHHHHHHHHHHHHHCCCCCCEEEE--CCEEEE--CCCCCCHHHHHHH T ss_conf 014467668999999919899999999708899999999999999958986787999--999998--7887883889999 Q ss_pred HHH Q ss_conf 984 Q gi|254780822|r 103 ILS 105 (107) Q Consensus 103 i~~ 105 (107) T Consensus 169 ~~~ 171 (178) T cd03019 169 LDE 171 (178) T ss_pred HHH T ss_conf 999

HHsearch alignment for GI: 254780822 and conserved domain: cd03019