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SEC11_PICST
ID   SEC11_PICST             Reviewed;         166 AA.
AC   A3LXS1;
DT   21-SEP-2011, integrated into UniProtKB/Swiss-Prot.
DT   03-APR-2007, sequence version 1.
DT   03-AUG-2022, entry version 81.
DE   RecName: Full=Signal peptidase complex catalytic subunit SEC11;
DE            EC=3.4.21.89 {ECO:0000250|UniProtKB:P15367};
DE   AltName: Full=Signal peptidase I;
GN   Name=SEC11; ORFNames=PICST_36729;
OS   Scheffersomyces stipitis (strain ATCC 58785 / CBS 6054 / NBRC 10063 / NRRL
OS   Y-11545) (Yeast) (Pichia stipitis).
OC   Eukaryota; Fungi; Dikarya; Ascomycota; Saccharomycotina; Saccharomycetes;
OC   Saccharomycetales; Debaryomycetaceae; Scheffersomyces.
OX   NCBI_TaxID=322104;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 58785 / CBS 6054 / NBRC 10063 / NRRL Y-11545;
RX   PubMed=17334359; DOI=10.1038/nbt1290;
RA   Jeffries T.W., Grigoriev I.V., Grimwood J., Laplaza J.M., Aerts A.,
RA   Salamov A., Schmutz J., Lindquist E., Dehal P., Shapiro H., Jin Y.-S.,
RA   Passoth V., Richardson P.M.;
RT   "Genome sequence of the lignocellulose-bioconverting and xylose-fermenting
RT   yeast Pichia stipitis.";
RL   Nat. Biotechnol. 25:319-326(2007).
CC   -!- FUNCTION: Catalytic component of the signal peptidase complex (SPC)
CC       which catalyzes the cleavage of N-terminal signal sequences from
CC       nascent proteins as they are translocated into the lumen of the
CC       endoplasmic reticulum (By similarity). Specifically cleaves N-terminal
CC       signal peptides that contain a hydrophobic alpha-helix (h-region)
CC       shorter than 18-20 amino acids (By similarity).
CC       {ECO:0000250|UniProtKB:P15367, ECO:0000250|UniProtKB:P67812}.
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         Evidence={ECO:0000250|UniProtKB:P15367};
CC   -!- SUBUNIT: Component of the signal peptidase complex (SPC) composed of a
CC       catalytic subunit SEC11 and three accessory subunits SPC1, SPC2 and
CC       SPC3 (By similarity). The complex induces a local thinning of the ER
CC       membrane which is used to measure the length of the signal peptide (SP)
CC       h-region of protein substrates. This ensures the selectivity of the
CC       complex towards h-regions shorter than 18-20 amino acids (By
CC       similarity). SPC associates with the translocon complex (By
CC       similarity). {ECO:0000250|UniProtKB:P15367,
CC       ECO:0000250|UniProtKB:P67812}.
CC   -!- SUBCELLULAR LOCATION: Endoplasmic reticulum membrane
CC       {ECO:0000250|UniProtKB:P15367}; Single-pass type II membrane protein
CC       {ECO:0000250|UniProtKB:P15367}.
CC   -!- DOMAIN: The C-terminal short (CTS) helix is essential for catalytic
CC       activity. It may be accommodated as a transmembrane helix in the
CC       thinned membrane environment of the complex, similarly to the signal
CC       peptide in the complex substrates. {ECO:0000250|UniProtKB:P67812}.
CC   -!- SIMILARITY: Belongs to the peptidase S26B family. {ECO:0000305}.
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DR   EMBL; CP000500; ABN67515.1; -; Genomic_DNA.
DR   RefSeq; XP_001385544.1; XM_001385507.1.
DR   AlphaFoldDB; A3LXS1; -.
DR   SMR; A3LXS1; -.
DR   STRING; 4924.XP_001385544.1; -.
DR   MEROPS; S26.010; -.
DR   EnsemblFungi; ABN67515; ABN67515; PICST_36729.
DR   GeneID; 4840037; -.
DR   KEGG; pic:PICST_36729; -.
DR   eggNOG; KOG3342; Eukaryota.
DR   HOGENOM; CLU_089996_0_0_1; -.
DR   InParanoid; A3LXS1; -.
DR   OMA; YNVRGKD; -.
DR   OrthoDB; 1486616at2759; -.
DR   Proteomes; UP000002258; Chromosome 6.
DR   GO; GO:0005789; C:endoplasmic reticulum membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
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; IPR019756; Pept_S26A_signal_pept_1_Ser-AS.
DR   InterPro; IPR015927; Peptidase_S24_S26A/B/C.
DR   InterPro; IPR019533; Peptidase_S26.
DR   InterPro; IPR001733; Peptidase_S26B.
DR   PANTHER; PTHR10806; PTHR10806; 1.
DR   Pfam; PF00717; Peptidase_S24; 1.
DR   PRINTS; PR00728; SIGNALPTASE.
DR   SUPFAM; SSF51306; SSF51306; 1.
DR   TIGRFAMs; TIGR02228; sigpep_I_arch; 1.
DR   PROSITE; PS00501; SPASE_I_1; 1.
DR   PROSITE; PS00761; SPASE_I_3; 1.
PE   3: Inferred from homology;
KW   Endoplasmic reticulum; Hydrolase; Membrane; Protease; Reference proteome;
KW   Signal-anchor; Transmembrane; Transmembrane helix.
FT   CHAIN           1..166
FT                   /note="Signal peptidase complex catalytic subunit SEC11"
FT                   /id="PRO_0000412363"
FT   TOPO_DOM        1..9
FT                   /note="Cytoplasmic"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        10..30
FT                   /note="Helical; Signal-anchor for type II membrane protein"
FT                   /evidence="ECO:0000255"
FT   TOPO_DOM        31..166
FT                   /note="Lumenal"
FT                   /evidence="ECO:0000255"
FT   REGION          152..163
FT                   /note="C-terminal short (CTS) helix"
FT                   /evidence="ECO:0000250|UniProtKB:P67812"
FT   ACT_SITE        44
FT                   /note="Charge relay system"
FT                   /evidence="ECO:0000250|UniProtKB:P15367"
FT   ACT_SITE        83
FT                   /note="Charge relay system"
FT                   /evidence="ECO:0000250|UniProtKB:P15367"
FT   ACT_SITE        108
FT                   /note="Charge relay system"
FT                   /evidence="ECO:0000250|UniProtKB:P15367"
SQ   SEQUENCE   166 AA;  18834 MW;  6BF1D744A03154FE CRC64;
     MNIRQQLTQF LSLAYVFTSA FVIWKSLGII TNSHSPIVVV LSGSMEPAFQ RGDILFLWNR
     DQEAKVGDIV VYEIQGRNIP IVHRVLREHH NSDKQLLLTK GDNNAVDDLG LYAKKQKYLN
     QKTDLVGSVK AYLPKLGYVT ILITENVYFK YGMLGLMCIS TLLTNE
 
 
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