ID   LSPA_BUCBP              Reviewed;         163 AA.
AC   Q89AV0;
DT   23-MAY-2003, integrated into UniProtKB/Swiss-Prot.
DT   23-MAY-2003, sequence version 1.
DT   04-NOV-2026, entry version 121.
DE   RecName: Full=Lipoprotein signal peptidase {ECO:0000255|HAMAP-Rule:MF_00161};
DE            EC=3.4.23.36 {ECO:0000255|HAMAP-Rule:MF_00161};
DE   AltName: Full=Prolipoprotein signal peptidase {ECO:0000255|HAMAP-Rule:MF_00161};
DE   AltName: Full=Signal peptidase II {ECO:0000255|HAMAP-Rule:MF_00161};
DE            Short=SPase II {ECO:0000255|HAMAP-Rule:MF_00161};
GN   Name=lspA {ECO:0000255|HAMAP-Rule:MF_00161};
GN   OrderedLocusNames=bbp_138;
OS   Buchnera aphidicola subsp. Baizongia pistaciae (strain Bp).
OC   Bacteria; Pseudomonadati; Pseudomonadota; Gammaproteobacteria;
OC   Enterobacterales; Erwiniaceae; Buchnera.
OX   NCBI_TaxID=224915;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Bp;
RX   PubMed=12522265; DOI=10.1073/pnas.0235981100;
RA   van Ham R.C.H.J., Kamerbeek J., Palacios C., Rausell C., Abascal F.,
RA   Bastolla U., Fernandez J.M., Jimenez L., Postigo M., Silva F.J.,
RA   Tamames J., Viguera E., Latorre A., Valencia A., Moran F., Moya A.;
RT   "Reductive genome evolution in Buchnera aphidicola.";
RL   Proc. Natl. Acad. Sci. U.S.A. 100:581-586(2003).
CC   -!- FUNCTION: This protein specifically catalyzes the removal of signal
CC       peptides from prolipoproteins. {ECO:0000255|HAMAP-Rule:MF_00161}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=Release of signal peptides from bacterial membrane
CC         prolipoproteins. Hydrolyzes -Xaa-Yaa-Zaa-|-(S,diacylglyceryl)Cys-, in
CC         which Xaa is hydrophobic (preferably Leu), and Yaa (Ala or Ser) and
CC         Zaa (Gly or Ala) have small, neutral side chains.; EC=3.4.23.36;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00161};
CC   -!- PATHWAY: Protein modification; lipoprotein biosynthesis (signal peptide
CC       cleavage). {ECO:0000255|HAMAP-Rule:MF_00161}.
CC   -!- SUBCELLULAR LOCATION: Cell membrane {ECO:0000255|HAMAP-Rule:MF_00161};
CC       Multi-pass membrane protein {ECO:0000255|HAMAP-Rule:MF_00161}.
CC   -!- SIMILARITY: Belongs to the peptidase A8 family. {ECO:0000255|HAMAP-
CC       Rule:MF_00161}.
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DR   EMBL; AE016826; AAO26872.1; -; Genomic_DNA.
DR   RefSeq; WP_011091273.1; NC_004545.1.
DR   AlphaFoldDB; Q89AV0; -.
DR   SMR; Q89AV0; -.
DR   STRING; 224915.bbp_138; -.
DR   KEGG; bab:bbp_138; -.
DR   eggNOG; COG0597; Bacteria.
DR   HOGENOM; CLU_083252_4_3_6; -.
DR   OMA; ADTMIFF; -.
DR   OrthoDB; 9810259at2; -.
DR   UniPathway; UPA00665; -.
DR   Proteomes; UP000000601; Chromosome.
DR   GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0004190; F:aspartic-type endopeptidase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0006508; P:proteolysis; IEA:InterPro.
DR   HAMAP; MF_00161; LspA; 1.
DR   InterPro; IPR001872; Peptidase_A8.
DR   NCBIfam; TIGR00077; lspA; 1.
DR   PANTHER; PTHR33695; LIPOPROTEIN SIGNAL PEPTIDASE; 1.
DR   PANTHER; PTHR33695:SF1; LIPOPROTEIN SIGNAL PEPTIDASE; 1.
DR   Pfam; PF01252; Peptidase_A8; 1.
DR   PRINTS; PR00781; LIPOSIGPTASE.
DR   PROSITE; PS00855; SPASE_II; 1.
PE   3: Inferred from homology;
KW   Aspartyl protease; Cell membrane; Hydrolase; Membrane; Protease;
KW   Reference proteome; Transmembrane; Transmembrane helix.
FT   CHAIN           1..163
FT                   /note="Lipoprotein signal peptidase"
FT                   /id="PRO_0000178773"
FT   TRANSMEM        3..23
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00161"
FT   TRANSMEM        70..90
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00161"
FT   TRANSMEM        94..114
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00161"
FT   TRANSMEM        134..154
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00161"
FT   ACT_SITE        125
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00161"
FT   ACT_SITE        143
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00161"
SQ   SEQUENCE   163 AA;  19147 MW;  D585E91DD7C5AFC4 CRC64;
     MKIPLIYNRI LILFFFIANI IILDQVSKKW IINNLLLHEK KPLISIMNIF YVRNYGTAFN
     FFSNNPGEKN YILCLISSIA ILIILKTMYN NTTIENFFYN IPSAFIISGA IGNFIDRCYL
     GYVIDFIDFH INNWHFATFN IADVSIFIGS VLFIYHNKYF LKN
//