KS2_STERE
ID KS2_STERE Reviewed; 784 AA.
AC Q9XEI0;
DT 07-APR-2021, integrated into UniProtKB/Swiss-Prot.
DT 01-NOV-1999, sequence version 1.
DT 03-AUG-2022, entry version 84.
DE RecName: Full=Ent-kaurene synthase 2, chloroplastic {ECO:0000303|PubMed:10504563};
DE Short=SrKS2 {ECO:0000303|PubMed:10504563};
DE EC=4.2.3.19 {ECO:0000269|PubMed:10504563};
DE Flags: Precursor;
GN Name=KS22-1 {ECO:0000303|PubMed:10504563};
OS Stevia rebaudiana (Stevia) (Eupatorium rebaudianum).
OC Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC asterids; campanulids; Asterales; Asteraceae; Asteroideae;
OC Heliantheae alliance; Eupatorieae; Stevia.
OX NCBI_TaxID=55670;
RN [1]
RP NUCLEOTIDE SEQUENCE [MRNA], FUNCTION, CATALYTIC ACTIVITY, PATHWAY, AND
RP TISSUE SPECIFICITY.
RC TISSUE=Leaf;
RX PubMed=10504563; DOI=10.1046/j.1365-313x.1999.00531.x;
RA Richman A.S., Gijzen M., Starratt A.N., Yang Z., Brandle J.E.;
RT "Diterpene synthesis in Stevia rebaudiana: recruitment and up-regulation of
RT key enzymes from the gibberellin biosynthetic pathway.";
RL Plant J. 19:411-421(1999).
CC -!- FUNCTION: Involved in the biosynthesis of ent-kaurene diterpenoids
CC natural products such as oridonin, miltiradiene, eriocalyxin B and
CC nezukol, known to exhibit antitumor, anti-inflammatory and
CC antibacterial activities, and in the production of gibberellins
CC phytohormones (PubMed:10504563). Catalyzes the conversion of ent-
CC copalyl diphosphate (ent-CPP) to ent-kaurene (PubMed:10504563).
CC {ECO:0000269|PubMed:10504563}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=ent-copalyl diphosphate = diphosphate + ent-kaur-16-ene;
CC Xref=Rhea:RHEA:22220, ChEBI:CHEBI:15415, ChEBI:CHEBI:33019,
CC ChEBI:CHEBI:58553; EC=4.2.3.19;
CC Evidence={ECO:0000269|PubMed:10504563};
CC PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:22221;
CC Evidence={ECO:0000269|PubMed:10504563};
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000250|UniProtKB:Q40577};
CC Note=Binds 3 Mg(2+) ions per subunit. {ECO:0000250|UniProtKB:Q40577};
CC -!- PATHWAY: Plant hormone biosynthesis; gibberellin biosynthesis.
CC {ECO:0000305}.
CC -!- PATHWAY: Secondary metabolite biosynthesis; terpenoid biosynthesis.
CC {ECO:0000269|PubMed:10504563}.
CC -!- SUBCELLULAR LOCATION: Plastid, chloroplast {ECO:0000255}.
CC -!- TISSUE SPECIFICITY: Accumulates in leaves.
CC {ECO:0000269|PubMed:10504563}.
CC -!- DOMAIN: The Asp-Asp-Xaa-Xaa-Asp/Glu (DDXXD/E) motif is important for
CC the catalytic activity, presumably through binding to Mg(2+).
CC {ECO:0000305}.
CC -!- SIMILARITY: Belongs to the terpene synthase family. {ECO:0000305}.
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DR EMBL; AF097311; AAD34295.1; -; mRNA.
DR AlphaFoldDB; Q9XEI0; -.
DR SMR; Q9XEI0; -.
DR UniPathway; UPA00213; -.
DR UniPathway; UPA00390; -.
DR GO; GO:0009507; C:chloroplast; IEA:UniProtKB-SubCell.
DR GO; GO:0009899; F:ent-kaurene synthase activity; IDA:UniProtKB.
DR GO; GO:0000287; F:magnesium ion binding; IEA:InterPro.
DR GO; GO:0033332; P:ent-kaurene biosynthetic process; IDA:UniProtKB.
DR GO; GO:0009686; P:gibberellin biosynthetic process; IEA:UniProtKB-UniPathway.
DR GO; GO:0016114; P:terpenoid biosynthetic process; IDA:UniProtKB.
DR CDD; cd00684; Terpene_cyclase_plant_C1; 1.
DR Gene3D; 1.10.600.10; -; 1.
DR Gene3D; 1.50.10.130; -; 1.
DR InterPro; IPR008949; Isoprenoid_synthase_dom_sf.
DR InterPro; IPR044814; Terpene_cyclase_plant_C1.
DR InterPro; IPR001906; Terpene_synth_N.
DR InterPro; IPR036965; Terpene_synth_N_sf.
DR InterPro; IPR005630; Terpene_synthase_metal-bd.
DR InterPro; IPR008930; Terpenoid_cyclase/PrenylTrfase.
DR Pfam; PF01397; Terpene_synth; 1.
DR Pfam; PF03936; Terpene_synth_C; 1.
DR SUPFAM; SSF48239; SSF48239; 2.
DR SUPFAM; SSF48576; SSF48576; 1.
PE 1: Evidence at protein level;
KW Chloroplast; Lyase; Magnesium; Metal-binding; Plastid; Transit peptide.
FT TRANSIT 1..28
FT /note="Chloroplast"
FT /evidence="ECO:0000255"
FT CHAIN 29..784
FT /note="Ent-kaurene synthase 2, chloroplastic"
FT /id="PRO_0000452390"
FT MOTIF 528..532
FT /note="DDXXD motif"
FT /evidence="ECO:0000305"
FT BINDING 528
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /evidence="ECO:0000250|UniProtKB:Q40577"
FT BINDING 528
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000250|UniProtKB:Q40577"
FT BINDING 532
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /evidence="ECO:0000250|UniProtKB:Q40577"
FT BINDING 532
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000250|UniProtKB:Q40577"
FT BINDING 672
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="3"
FT /evidence="ECO:0000250|UniProtKB:Q40577"
FT BINDING 680
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="3"
FT /evidence="ECO:0000250|UniProtKB:Q40577"
SQ SEQUENCE 784 AA; 89401 MW; 284BD3972DC09051 CRC64;
MNLSLCIASP LLTKSNRPAA LSAIHTASTS HGGQTNPTNL IIDTTKERIQ KQFKNVEISV
SSYDTAWVAM VPSPNSPKSP CFPECLNWLI NNQLNDGSWG LVNHTHNHNH PLLKDSLSST
LACIVALKRW NVGEDQINKG LSFIESNLAS ATEKSQPSPI GFDIIFPGLL EYAKNLDINL
LSKQTDFSLM LHKRELEQKR CHSNEMDGYL AYISEGLGNL YDWNMVKKYQ MKNGSVFNSP
SATAAAFINH QNPGCLNYLN SLLDKFGNAV PTVYPHDLFI RLSMVDTIER LGISHHFRVE
IKNVLDETYR CWVERDEQIF MDVVTCALAF RLLRINGYEV SPDPLAEITN ELALKDEYAA
LETYHASHIL YQEDLSSGKQ ILKSADFLKE IISTDSNRLS KLIHKEVENA LKFPINTGLE
RINTRRNIQL YNVDNTRILK TTYHSSNISN TDYLRLAVED FYTCQSIYRE ELKGLERWVV
ENKLDQLKFA RQKTAYCYFS VAATLSSPEL SDARISWAKN GILTTVVDDF FDIGGTIDEL
TNLIQCVEKW NVDVDKDCCS EHVRILFLAL KDAICWIGDE AFKWQARDVT SHVIQTWLEL
MNSMLREAIW TRDAYVPTLN EYMENAYVSF ALGPIVKPAI YFVGPKLSEE IVESSEYHNL
FKLMSTQGRL LNDIHSFKRE FKEGKLNAVA LHLSNGESGK VEEEVVEEMM MMIKNKRKEL
MKLIFEENGS IVPRACKDAF WNMCHVLNFF YANDDGFTGN TILDTVKDII YNPLVLVNEN
EEQR
