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PEPX_STRTD
ID   PEPX_STRTD              Reviewed;         755 AA.
AC   Q03J44;
DT   15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT   14-NOV-2006, sequence version 1.
DT   03-AUG-2022, entry version 86.
DE   RecName: Full=Xaa-Pro dipeptidyl-peptidase {ECO:0000255|HAMAP-Rule:MF_00698};
DE            EC=3.4.14.11 {ECO:0000255|HAMAP-Rule:MF_00698};
DE   AltName: Full=X-Pro dipeptidyl-peptidase {ECO:0000255|HAMAP-Rule:MF_00698};
DE   AltName: Full=X-prolyl-dipeptidyl aminopeptidase {ECO:0000255|HAMAP-Rule:MF_00698};
DE            Short=X-PDAP {ECO:0000255|HAMAP-Rule:MF_00698};
GN   Name=pepX {ECO:0000255|HAMAP-Rule:MF_00698}; OrderedLocusNames=STER_1633;
OS   Streptococcus thermophilus (strain ATCC BAA-491 / LMD-9).
OC   Bacteria; Firmicutes; Bacilli; Lactobacillales; Streptococcaceae;
OC   Streptococcus.
OX   NCBI_TaxID=322159;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC BAA-491 / LMD-9;
RX   PubMed=17030793; DOI=10.1073/pnas.0607117103;
RA   Makarova K.S., Slesarev A., Wolf Y.I., Sorokin A., Mirkin B., Koonin E.V.,
RA   Pavlov A., Pavlova N., Karamychev V., Polouchine N., Shakhova V.,
RA   Grigoriev I., Lou Y., Rohksar D., Lucas S., Huang K., Goodstein D.M.,
RA   Hawkins T., Plengvidhya V., Welker D., Hughes J., Goh Y., Benson A.,
RA   Baldwin K., Lee J.-H., Diaz-Muniz I., Dosti B., Smeianov V., Wechter W.,
RA   Barabote R., Lorca G., Altermann E., Barrangou R., Ganesan B., Xie Y.,
RA   Rawsthorne H., Tamir D., Parker C., Breidt F., Broadbent J.R., Hutkins R.,
RA   O'Sullivan D., Steele J., Unlu G., Saier M.H. Jr., Klaenhammer T.,
RA   Richardson P., Kozyavkin S., Weimer B.C., Mills D.A.;
RT   "Comparative genomics of the lactic acid bacteria.";
RL   Proc. Natl. Acad. Sci. U.S.A. 103:15611-15616(2006).
CC   -!- FUNCTION: Removes N-terminal dipeptides sequentially from polypeptides
CC       having unsubstituted N-termini provided that the penultimate residue is
CC       proline. {ECO:0000255|HAMAP-Rule:MF_00698}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=Hydrolyzes Xaa-Pro-|- bonds to release unblocked, N-terminal
CC         dipeptides from substrates including Ala-Pro-|-p-nitroanilide and
CC         (sequentially) Tyr-Pro-|-Phe-Pro-|-Gly-Pro-|-Ile.; EC=3.4.14.11;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00698};
CC   -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_00698}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00698}.
CC   -!- SIMILARITY: Belongs to the peptidase S15 family. {ECO:0000255|HAMAP-
CC       Rule:MF_00698}.
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DR   EMBL; CP000419; ABJ66778.1; -; Genomic_DNA.
DR   RefSeq; WP_011681561.1; NC_008532.1.
DR   AlphaFoldDB; Q03J44; -.
DR   SMR; Q03J44; -.
DR   ESTHER; strtr-pepx; Lactobacillus_peptidase.
DR   MEROPS; S15.001; -.
DR   KEGG; ste:STER_1633; -.
DR   HOGENOM; CLU_011800_0_0_9; -.
DR   OMA; LYTASPY; -.
DR   BRENDA; 3.4.14.11; 5956.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0004177; F:aminopeptidase activity; IEA:UniProtKB-KW.
DR   GO; GO:0008239; F:dipeptidyl-peptidase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0008236; F:serine-type peptidase activity; IEA:UniProtKB-KW.
DR   GO; GO:0006508; P:proteolysis; IEA:UniProtKB-KW.
DR   Gene3D; 3.40.50.1820; -; 1.
DR   HAMAP; MF_00698; Aminopeptidase_S15; 1.
DR   InterPro; IPR029058; AB_hydrolase.
DR   InterPro; IPR008979; Galactose-bd-like_sf.
DR   InterPro; IPR008252; Pept_S15_Xpro.
DR   InterPro; IPR015251; PepX_N_dom.
DR   InterPro; IPR036313; PepX_N_dom_sf.
DR   InterPro; IPR000383; Xaa-Pro-like_dom.
DR   InterPro; IPR013736; Xaa-Pro_dipept_C.
DR   Pfam; PF02129; Peptidase_S15; 1.
DR   Pfam; PF08530; PepX_C; 1.
DR   Pfam; PF09168; PepX_N; 1.
DR   PRINTS; PR00923; LACTOPTASE.
DR   SMART; SM00939; PepX_C; 1.
DR   SMART; SM00940; PepX_N; 1.
DR   SUPFAM; SSF49785; SSF49785; 1.
DR   SUPFAM; SSF53474; SSF53474; 1.
DR   SUPFAM; SSF81761; SSF81761; 1.
PE   3: Inferred from homology;
KW   Aminopeptidase; Cytoplasm; Hydrolase; Protease; Serine protease.
FT   CHAIN           1..755
FT                   /note="Xaa-Pro dipeptidyl-peptidase"
FT                   /id="PRO_1000045497"
FT   ACT_SITE        348
FT                   /note="Charge relay system"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00698"
FT   ACT_SITE        468
FT                   /note="Charge relay system"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00698"
FT   ACT_SITE        498
FT                   /note="Charge relay system"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00698"
SQ   SEQUENCE   755 AA;  85703 MW;  A656A8D1E478FCDB CRC64;
     MKFNQFSYIP VSPETAYQEL RSLGFEVSLD ASAKANFESF VRKYFLFFED TDLALKNWIA
     DPETDLLSFF QSDRPLTAEV FGLVALQLLG FVPNVDFTDS VAFLEKMAFP IAFDGSLNNL
     HQLLATRTQS GNTLIDQLVA QDLIPISNDY VFFNGKSLAT FDTNQLHREV VYVETPVDTD
     KDGLLDLVKV TILRPNVDFP VPAMMTASPY QQGTNEPSSD KLTHKMEGDL LVKPAGKISL
     SRPEIKAPEA DLTPINPVTK AEERFAHTDT YTLNDYMLAR GVASIYVSGV GTFNSEGFMT
     SGDYQQVLAY KAVIDWLNGR ARAFTSRSRQ HTITADWASG KVTTTGLSYL GTMSNALATT
     GVDGLEMVIA EAGISSWYDY YRENGLLVSP GGYPGEDLDT LTEFTYSRAL LAGEYLRHQK
     DYEAYLNELS TAIDRKHGDY NQFWHDRNYV QFADRVKATV VFTHGSQDWN VKPINVYQMF
     RALPKSLEKH LFFHNGAHVY MNAWQSIDFR ESMNALICQK LLDLDNGYTL PTVIWQNNQS
     EQTWEVLDNF GHDNGKHIQL GKAEASIANH YEEEIFAKYG KAYQSFKDDL FMDKANAITL
     DFELDQDIQI NGRVHLELRV KSSTNRGLIS AQVLEMGDKK YLAPIPELKR MNVDNGRLFK
     EEALRELPFK QAKYRVITKG HLNLQNRKDL LSIENVTPNE WMTIGLDLQP TIYKLNKGDK
     LRLVLYTTDF EHTIRDNSDY EVTVDLSQSK MTLPY
 
 
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