ID   LEP_RICBR               Reviewed;         291 AA.
AC   Q1RHA1;
DT   05-FEB-2008, integrated into UniProtKB/Swiss-Prot.
DT   16-MAY-2006, sequence version 1.
DT   03-AUG-2022, entry version 110.
DE   RecName: Full=Signal peptidase I;
DE            Short=SPase I;
DE            EC=3.4.21.89;
DE   AltName: Full=Leader peptidase I;
GN   Name=lepB; OrderedLocusNames=RBE_1182;
OS   Rickettsia bellii (strain RML369-C).
OC   Bacteria; Proteobacteria; Alphaproteobacteria; Rickettsiales;
OC   Rickettsiaceae; Rickettsieae; Rickettsia; belli group.
OX   NCBI_TaxID=336407;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=RML369-C;
RX   PubMed=16703114; DOI=10.1371/journal.pgen.0020076;
RA   Ogata H., La Scola B., Audic S., Renesto P., Blanc G., Robert C.,
RA   Fournier P.-E., Claverie J.-M., Raoult D.;
RT   "Genome sequence of Rickettsia bellii illuminates the role of amoebae in
RT   gene exchanges between intracellular pathogens.";
RL   PLoS Genet. 2:733-744(2006).
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=Cleavage of hydrophobic, N-terminal signal or leader sequences
CC         from secreted and periplasmic proteins.; EC=3.4.21.89;
CC   -!- SUBCELLULAR LOCATION: Cell inner membrane {ECO:0000305}; Single-pass
CC       type II membrane protein {ECO:0000305}.
CC   -!- SIMILARITY: Belongs to the peptidase S26 family. {ECO:0000305}.
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DR   EMBL; CP000087; ABE05263.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q1RHA1; -.
DR   SMR; Q1RHA1; -.
DR   STRING; 336407.RBE_1182; -.
DR   MEROPS; S26.001; -.
DR   EnsemblBacteria; ABE05263; ABE05263; RBE_1182.
DR   KEGG; rbe:RBE_1182; -.
DR   eggNOG; COG0681; Bacteria.
DR   HOGENOM; CLU_028723_1_2_5; -.
DR   OMA; SDSRFWG; -.
DR   Proteomes; UP000001951; Chromosome.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0004252; F:serine-type endopeptidase activity; IEA:UniProtKB-EC.
DR   GO; GO:0006465; P:signal peptide processing; IEA:InterPro.
DR   CDD; cd06530; S26_SPase_I; 1.
DR   InterPro; IPR036286; LexA/Signal_pep-like_sf.
DR   InterPro; IPR000223; Pept_S26A_signal_pept_1.
DR   InterPro; IPR019758; Pept_S26A_signal_pept_1_CS.
DR   InterPro; IPR019757; Pept_S26A_signal_pept_1_Lys-AS.
DR   InterPro; IPR019533; Peptidase_S26.
DR   PANTHER; PTHR43390; PTHR43390; 1.
DR   Pfam; PF10502; Peptidase_S26; 1.
DR   PRINTS; PR00727; LEADERPTASE.
DR   SUPFAM; SSF51306; SSF51306; 1.
DR   TIGRFAMs; TIGR02227; sigpep_I_bact; 1.
DR   PROSITE; PS00760; SPASE_I_2; 1.
DR   PROSITE; PS00761; SPASE_I_3; 1.
PE   3: Inferred from homology;
KW   Cell inner membrane; Cell membrane; Hydrolase; Membrane; Transmembrane;
KW   Transmembrane helix.
FT   CHAIN           1..291
FT                   /note="Signal peptidase I"
FT                   /id="PRO_0000316273"
FT   TOPO_DOM        1..45
FT                   /note="Cytoplasmic"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        46..66
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TOPO_DOM        67..291
FT                   /note="Periplasmic"
FT                   /evidence="ECO:0000255"
FT   ACT_SITE        70
FT                   /evidence="ECO:0000250"
FT   ACT_SITE        133
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   291 AA;  34121 MW;  0C743E8E8A94B434 CRC64;
     MTMKKLTSTT TTLWDNKLFI NNLKNFMQTN TESNNNKTTA QEWKSFILVV VIALMIRILI
     IESFVVPTGS MKATILENDR IFGTKYSYGY SNYSLSFFDF IHLFKGRIFA RTPERGDIII
     FRPPHEMNTR YIKRLIGLPG DKVQLIDDVI YINDEKIERV ESGIYVSEEG RKYLKFKETL
     PNGKTYFSYK LAPVLGIMFN DKYGNTDAFY VPEGEYFFLG DNRDQSNDSR IDLGFVPFEN
     FIAKAQFIWF STKITWWDSD IGVINLILKL KPWAESIRFN RIFRNLYSIE D