>cd07014 S49_SppA Signal peptide peptidase A. Signal peptide peptidase A (SppA; Peptidase S49; Protease IV): SppA is an intramembrane enzyme found in all three domains of life and is involved in the cleavage of signal peptides after their removal from the precursor proteins by signal peptidases. Unlike the eukaryotic functional homologs that are proposed to be aspartic proteases, site-directed mutagenesis and sequence analysis have shown these bacterial, archaeal and thylakoid SppAs to be ClpP-like serine proteases. The predicted active site serine for members in this family occurs in a transmembrane domain, cleaving peptide bonds in the plane of the lipid bilayer. Mutagenesis studies also suggest that the catalytic center comprises a Ser-Lys dyad (both residues absolutely conserved within bacteria, chloroplast and mitochondrial signal peptidase family members) and not the usual Ser-His-Asp catalytic triad found in the majority of serine proteases. In addition to the carboxyl-terminal p

Probab=97.05 E-value=0.0071 Score=41.45 Aligned_cols=128 Identities=13% Similarity=0.122 Sum_probs=82.3 Q ss_pred CCCCCHHHHHHHHHHHHHHHHCC--CCEEEEEECCCCCCCCCCCCHHHHHHHHHHHHHHHCCCCCEEEEEECCCCCCCCC Q ss_conf 67768368999999999999719--9489999535324677843002799999998886237998899996167777542 Q gi|254780588|r 129 FGSPRPEGYRKAVRLMEMADRFK--IPVISFIDTAGAYPGVDAEARGQGEAIARATEMCLKLQVPILSIIIGEGGSGGAM 206 (317) Q Consensus 129 ~G~~~p~g~rKa~r~~~~A~~f~--lPiv~lvDtpGa~~g~~aE~~G~~~aia~~l~~~~~~~vP~i~vv~geg~sGGA~ 206 (317) T Consensus 19 ~g~~~~~~i---~~~l~~a~~d~~vkaIvL~InSPGGs~-------~~s~~i~~~I~~~r~~~KPV~a~~~~~aASg~Y~ 88 (177) T cd07014 19 QGNVSGDTT---AAQIRDARLDPKVKAIVLRVNSPGGSV-------TASEVIRAELAAARAAGKPVVASGGGNAASGGYW 88 (177) T ss_pred CCCCCHHHH---HHHHHHHHHCCCCCEEEEEEECCCCCH-------HHHHHHHHHHHHHHHCCCCEEEEECCCCCCHHHH T ss_conf 887169999---999999951999628999961898188-------9999999999998865998999977856205778 Q ss_pred CCCCCCCEEEECCCCEE---EECH-HHHHHHH---C----------C--CCHHH-HHHHHHCCCCHHHHHHCCCCCEEEC Q ss_conf 11332000220467401---2155-4422442---1----------5--60122-5655420388489997899652622 Q gi|254780588|r 207 GIAAANFVYMLEHAIYS---VISP-EGAASIL---W----------R--DSSRA-AQAAIAMKIIATDLQDLSIIDGIIP 266 (317) Q Consensus 207 a~~~~d~v~m~~~s~ys---visP-Eg~AsIL---w----------k--d~~~a-~eAAealklTa~DL~~lGiID~II~ 266 (317) T Consensus 89 iA~aad~I~a~p~s~vGSIGV~~~~~~~q~~vd~~~~~Fv~~Va~~R~~~~~~~~~~~~~G~v~~g~~A~~~GLiD~iG~ 168 (177) T cd07014 89 ISTPANYIVANPSTLVGSIGIFGVQLADQLSIENGYKRFITLVADNRHSTPEQQIDKIAQGGVWTGQDAKANGLVDSLGS 168 (177) T ss_pred HHHCCCEEEECCCCEEEEEEEEEEHHHHHHHHHHHHHHHHHHHHHHCCCCHHHHHHHHCCCCEEEHHHHHHCCCCCCCCC T ss_conf 76127889986997277626986668999999999999999999747999678687606867788999998699765699

HHsearch alignment for GI: 254780588 and conserved domain: cd07014