>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=100.00 E-value=1.7e-43 Score=293.77 Aligned_cols=162 Identities=31% Similarity=0.491 Sum_probs=149.9 Q ss_pred EEEEEEEECC-------------HHHHHHHHHHHHCCCCCCEEEEECCCCCCCHHHHHHHHHHHHHHC-CCCCEEEEECC Q ss_conf 9997666238-------------699999999986189987999975888888899999999999841-47867996033 Q gi|254780747|r 40 RIAIRGQIED-------------SQELIERIERISRDDSATALIVSLSSPGGSAYAGEAIFRAIQKVK-NRKPVITEVHE 105 (293) Q Consensus 40 ~i~i~G~I~~-------------~~~l~~~l~~a~~d~~ik~ivL~i~SpGG~~~~~~~i~~ai~~~k-~~kpvva~~~~ 105 (293) T Consensus 1 vi~~~G~I~~g~~~~~~~~g~~~~~~i~~~l~~a~~d~~vkaIvL~InSPGGs~~~s~~i~~~I~~~r~~~KPV~a~~~~ 80 (177) T cd07014 1 VVFANGVIVDGEESSSDTQGNVSGDTTAAQIRDARLDPKVKAIVLRVNSPGGSVTASEVIRAELAAARAAGKPVVASGGG 80 (177) T ss_pred CEEEEEEEECCCCCCCCCCCCCCHHHHHHHHHHHHHCCCCCEEEEEEECCCCCHHHHHHHHHHHHHHHHCCCCEEEEECC T ss_conf 98999789768887888888716999999999995199962899996189818899999999999988659989999778 Q ss_pred CCCCCCCCCCCCCCCCCCCHHHHHHHHHHHHCCCHHHHHHHHHHHCCEEEEECCCCCCCCCCCCCCHHHHHHHHHHHHHH Q ss_conf 23322321000111000130135345556530210245677742042255315521123466678999988777776666 Q gi|254780747|r 106 MAASAGYLISCASNIIVAAETSLVGSIGVLFQYPYVKPFLDKLGVSIKSVKSSPMKAEPSPFSEVNPKAVQMMQDVVDSS 185 (293) Q Consensus 106 ~~~S~~Y~iAs~ad~I~a~p~s~vGsiGv~~~~~~~~~ll~k~gi~~~~~~~g~~K~~~~p~~~~s~e~~~~~~~~l~~~ 185 (293) T Consensus 81 ~aASg~Y~iA~aad~I~a~p~s~vGSIGV~~~-------------------------------------~~~~q~~vd~~ 123 (177) T cd07014 81 NAASGGYWISTPANYIVANPSTLVGSIGIFGV-------------------------------------QLADQLSIENG 123 (177) T ss_pred CCCCHHHHHHHCCCEEEECCCCEEEEEEEEEE-------------------------------------HHHHHHHHHHH T ss_conf 56205778761278899869972776269866-------------------------------------68999999999 Q ss_pred HHHHHHHHHHCCCCCHHHH-HHHHCCCCCCHHHHHHCCCCCCCCCHHHHHHHHH Q ss_conf 6778999985149998899-8873498237889987798062389899999999 Q gi|254780747|r 186 YHWFVRLVSESRNIPYDKT-LVLSDGRIWTGAEAKKVGLIDVVGGQEEVWQSLY 238 (293) Q Consensus 186 ~~~f~~~Va~~R~~~~~~~-~~~~~g~~~~~~~A~~~GLvD~ig~~~~a~~~l~ 238 (293) T Consensus 124 ~~~Fv~~Va~~R~~~~~~~~~~~~~G~v~~g~~A~~~GLiD~iG~~~dai~~~A 177 (177) T cd07014 124 YKRFITLVADNRHSTPEQQIDKIAQGGVWTGQDAKANGLVDSLGSFDDAVAKLA 177 (177) T ss_pred HHHHHHHHHHHCCCCHHHHHHHHCCCCEEEHHHHHHCCCCCCCCCHHHHHHHHC T ss_conf 999999999747999678687606867788999998699765699999999759

HHsearch alignment for GI: 254780747 and conserved domain: cd07014