ID   CLPP_CITSI              Reviewed;         196 AA.
AC   Q09MF2;
DT   06-FEB-2007, integrated into UniProtKB/Swiss-Prot.
DT   17-OCT-2006, sequence version 1.
DT   02-SEP-2026, entry version 74.
DE   RecName: Full=ATP-dependent Clp protease proteolytic subunit {ECO:0000255|HAMAP-Rule:MF_00444};
DE            EC=3.4.21.92 {ECO:0000255|HAMAP-Rule:MF_00444};
DE   AltName: Full=Endopeptidase Clp {ECO:0000255|HAMAP-Rule:MF_00444};
GN   Name=clpP {ECO:0000255|HAMAP-Rule:MF_00444};
OS   Citrus sinensis (Sweet orange) (Citrus aurantium var. sinensis).
OG   Plastid; Chloroplast.
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   rosids; malvids; Sapindales; Rutaceae; Aurantioideae; Citrus.
OX   NCBI_TaxID=2711;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=cv. Ridge Pineapple;
RX   PubMed=17010212; DOI=10.1186/1471-2229-6-21;
RA   Bausher M.G., Singh N.D., Lee S.-B., Jansen R.K., Daniell H.;
RT   "The complete chloroplast genome sequence of Citrus sinensis (L.) Osbeck
RT   var 'Ridge Pineapple': organization and phylogenetic relationships to other
RT   angiosperms.";
RL   BMC Plant Biol. 6:21-21(2006).
CC   -!- FUNCTION: Cleaves peptides in various proteins in a process that
CC       requires ATP hydrolysis. Has a chymotrypsin-like activity. Plays a
CC       major role in the degradation of misfolded proteins.
CC       {ECO:0000255|HAMAP-Rule:MF_00444}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=Hydrolysis of proteins to small peptides in the presence of
CC         ATP and magnesium. alpha-casein is the usual test substrate. In the
CC         absence of ATP, only oligopeptides shorter than five residues are
CC         hydrolyzed (such as succinyl-Leu-Tyr-|-NHMec, and Leu-Tyr-Leu-|-Tyr-
CC         Trp, in which cleavage of the -Tyr-|-Leu- and -Tyr-|-Trp bonds also
CC         occurs).; EC=3.4.21.92; Evidence={ECO:0000255|HAMAP-Rule:MF_00444};
CC   -!- SUBUNIT: Component of the chloroplastic Clp protease core complex.
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast stroma {ECO:0000255|HAMAP-
CC       Rule:MF_00444}.
CC   -!- SIMILARITY: Belongs to the peptidase S14 family. {ECO:0000255|HAMAP-
CC       Rule:MF_00444}.
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DR   EMBL; DQ864733; ABI49044.1; -; Genomic_DNA.
DR   RefSeq; YP_740501.1; NC_008334.1.
DR   AlphaFoldDB; Q09MF2; -.
DR   SMR; Q09MF2; -.
DR   MEROPS; S14.002; -.
DR   GeneID; 4271124; -.
DR   KEGG; cit:4271124; -.
DR   OrthoDB; 923401at71240; -.
DR   Proteomes; UP000027120; Chloroplast.
DR   GO; GO:0009534; C:chloroplast thylakoid; IEA:UniProtKB-ARBA.
DR   GO; GO:0009840; C:chloroplastic endopeptidase Clp complex; IEA:UniProtKB-ARBA.
DR   GO; GO:0004176; F:ATP-dependent peptidase activity; IEA:InterPro.
DR   GO; GO:0004252; F:serine-type endopeptidase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0006508; P:proteolysis; IEA:UniProtKB-UniRule.
DR   CDD; cd07017; S14_ClpP_2; 1.
DR   FunFam; 3.90.226.10:FF:000006; ATP-dependent Clp protease proteolytic subunit; 1.
DR   Gene3D; 3.90.226.10; 2-enoyl-CoA Hydratase, Chain A, domain 1; 1.
DR   HAMAP; MF_00444; ClpP; 1.
DR   InterPro; IPR001907; ClpP.
DR   InterPro; IPR029045; ClpP/crotonase-like_dom_sf.
DR   InterPro; IPR023562; ClpP/TepA.
DR   InterPro; IPR033135; ClpP_His_AS.
DR   InterPro; IPR018215; ClpP_Ser_AS.
DR   PANTHER; PTHR10381; ATP-DEPENDENT CLP PROTEASE PROTEOLYTIC SUBUNIT; 1.
DR   PANTHER; PTHR10381:SF15; CHLOROPLASTIC ATP-DEPENDENT CLP PROTEASE PROTEOLYTIC SUBUNIT 1; 1.
DR   Pfam; PF00574; CLP_protease; 1.
DR   PRINTS; PR00127; CLPPROTEASEP.
DR   SUPFAM; SSF52096; ClpP/crotonase; 1.
DR   PROSITE; PS00382; CLP_PROTEASE_HIS; 1.
DR   PROSITE; PS00381; CLP_PROTEASE_SER; 1.
PE   3: Inferred from homology;
KW   Chloroplast; Hydrolase; Plastid; Protease; Reference proteome;
KW   Serine protease.
FT   CHAIN           1..196
FT                   /note="ATP-dependent Clp protease proteolytic subunit"
FT                   /id="PRO_0000275279"
FT   ACT_SITE        101
FT                   /note="Nucleophile"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00444"
FT   ACT_SITE        126
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00444"
SQ   SEQUENCE   196 AA;  21912 MW;  F5FFCCEA72EC6DCF CRC64;
     MPIGVPKVPY RSPGDKHPSW VDIYNRLYRE RLLFLGQMVE SDISNQLIGI MVYLSIENET
     KDLYLFINSP GGWVIPGIAI YDTMQFVRPD VQTICMGLAA SMGSFLLAAG ASTKRLAFPH
     ARVMIHQPIG AFYGAQTGEF ILDTEELLRL REILTMVYVQ RSGKPLWVVS EDMERDTFMS
     ATEAQAHGLV DLVAVG
//