ID   RBL_LATCL               Reviewed;         477 AA.
AC   Q33584;
DT   15-DEC-1998, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1996, sequence version 1.
DT   03-AUG-2022, entry version 103.
DE   RecName: Full=Ribulose bisphosphate carboxylase large chain;
DE            Short=RuBisCO large subunit;
DE            EC=4.1.1.39;
DE   Flags: Precursor;
GN   Name=rbcL;
OS   Lathraea clandestina (Purple toothwort).
OG   Plastid; Non-photosynthetic plastid.
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   asterids; lamiids; Lamiales; Orobanchaceae; Rhinantheae; Lathraea.
OX   NCBI_TaxID=41911;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=8555449; DOI=10.1007/bf00014978;
RA   Delavault P.M., Sakanyan V., Thalouarn P.;
RT   "Divergent evolution of two plastid genes, rbcL and atpB, in a non-
RT   photosynthetic parasitic plant.";
RL   Plant Mol. Biol. 29:1071-1079(1995).
CC   -!- FUNCTION: RuBisCO catalyzes two reactions: the carboxylation of D-
CC       ribulose 1,5-bisphosphate, the primary event in carbon dioxide
CC       fixation, as well as the oxidative fragmentation of the pentose
CC       substrate in the photorespiration process. Both reactions occur
CC       simultaneously and in competition at the same active site (By
CC       similarity). {ECO:0000250}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=2 (2R)-3-phosphoglycerate + 2 H(+) = CO2 + D-ribulose 1,5-
CC         bisphosphate + H2O; Xref=Rhea:RHEA:23124, ChEBI:CHEBI:15377,
CC         ChEBI:CHEBI:15378, ChEBI:CHEBI:16526, ChEBI:CHEBI:57870,
CC         ChEBI:CHEBI:58272; EC=4.1.1.39;
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=D-ribulose 1,5-bisphosphate + O2 = (2R)-3-phosphoglycerate +
CC         2-phosphoglycolate + 2 H(+); Xref=Rhea:RHEA:36631, ChEBI:CHEBI:15378,
CC         ChEBI:CHEBI:15379, ChEBI:CHEBI:57870, ChEBI:CHEBI:58033,
CC         ChEBI:CHEBI:58272;
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420; Evidence={ECO:0000250};
CC       Note=Binds 1 Mg(2+) ion per subunit. {ECO:0000250};
CC   -!- SUBUNIT: Heterohexadecamer of 8 large chains and 8 small chains;
CC       disulfide-linked. The disulfide link is formed within the large subunit
CC       homodimers (By similarity). {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Plastid.
CC   -!- PTM: The disulfide bond which can form in the large chain dimeric
CC       partners within the hexadecamer appears to be associated with oxidative
CC       stress and protein turnover. {ECO:0000250}.
CC   -!- MISCELLANEOUS: The basic functional RuBisCO is composed of a large
CC       chain homodimer in a 'head-to-tail' conformation. In form I RuBisCO
CC       this homodimer is arranged in a barrel-like tetramer with the small
CC       subunits forming a tetrameric 'cap' on each end of the 'barrel' (By
CC       similarity). {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the RuBisCO large chain family. Type I
CC       subfamily. {ECO:0000305}.
CC   -!- CAUTION: This organism being non-photosynthetic, the role of this
CC       protein is uncertain. {ECO:0000305}.
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DR   EMBL; X83719; CAA58691.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q33584; -.
DR   SMR; Q33584; -.
DR   PRIDE; Q33584; -.
DR   GO; GO:0009536; C:plastid; IEA:UniProtKB-SubCell.
DR   GO; GO:0000287; F:magnesium ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0004497; F:monooxygenase activity; IEA:UniProtKB-KW.
DR   GO; GO:0016984; F:ribulose-bisphosphate carboxylase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0015977; P:carbon fixation; IEA:UniProtKB-UniRule.
DR   GO; GO:0009853; P:photorespiration; IEA:UniProtKB-KW.
DR   CDD; cd08212; RuBisCO_large_I; 1.
DR   Gene3D; 3.20.20.110; -; 1.
DR   Gene3D; 3.30.70.150; -; 1.
DR   HAMAP; MF_01338; RuBisCO_L_type1; 1.
DR   InterPro; IPR033966; RuBisCO.
DR   InterPro; IPR020878; RuBisCo_large_chain_AS.
DR   InterPro; IPR000685; RuBisCO_lsu_C.
DR   InterPro; IPR036376; RuBisCO_lsu_C_sf.
DR   InterPro; IPR017443; RuBisCO_lsu_fd_N.
DR   InterPro; IPR036422; RuBisCO_lsu_N_sf.
DR   InterPro; IPR020888; RuBisCO_lsuI.
DR   PANTHER; PTHR42704; PTHR42704; 1.
DR   Pfam; PF00016; RuBisCO_large; 1.
DR   Pfam; PF02788; RuBisCO_large_N; 1.
DR   SFLD; SFLDS00014; RuBisCO; 1.
DR   SUPFAM; SSF51649; SSF51649; 1.
DR   SUPFAM; SSF54966; SSF54966; 1.
DR   PROSITE; PS00157; RUBISCO_LARGE; 1.
PE   3: Inferred from homology;
KW   Acetylation; Calvin cycle; Carbon dioxide fixation; Disulfide bond; Lyase;
KW   Magnesium; Metal-binding; Methylation; Monooxygenase; Oxidoreductase;
KW   Photorespiration; Plastid.
FT   PROPEP          1..2
FT                   /evidence="ECO:0000250"
FT                   /id="PRO_0000031275"
FT   CHAIN           3..477
FT                   /note="Ribulose bisphosphate carboxylase large chain"
FT                   /id="PRO_0000031276"
FT   ACT_SITE        175
FT                   /note="Proton acceptor"
FT                   /evidence="ECO:0000250"
FT   ACT_SITE        294
FT                   /note="Proton acceptor"
FT                   /evidence="ECO:0000250"
FT   BINDING         123
FT                   /ligand="substrate"
FT                   /note="in homodimeric partner"
FT                   /evidence="ECO:0000250"
FT   BINDING         173
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000250"
FT   BINDING         177
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000250"
FT   BINDING         201
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /note="via carbamate group"
FT                   /evidence="ECO:0000250"
FT   BINDING         203
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000250"
FT   BINDING         204
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000250"
FT   BINDING         295
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000250"
FT   BINDING         327
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000250"
FT   BINDING         379
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000250"
FT   SITE            334
FT                   /note="Transition state stabilizer"
FT                   /evidence="ECO:0000250"
FT   MOD_RES         3
FT                   /note="N-acetylproline"
FT                   /evidence="ECO:0000250"
FT   MOD_RES         14
FT                   /note="N6,N6,N6-trimethyllysine"
FT                   /evidence="ECO:0000250"
FT   MOD_RES         201
FT                   /note="N6-carboxylysine"
FT                   /evidence="ECO:0000250"
FT   DISULFID        247
FT                   /note="Interchain; in linked form"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   477 AA;  52845 MW;  9CDF416F88787245 CRC64;
     MSPQTETKAS VGFKAGVKEY KLAYYTPEYE TKDTDILAAF RVTPQPGVPP EEAGAAVAAE
     SSTGTWTTVW TDGLTSLDRY KGRCYHIEPV PGETDQYICY VAYPLDLFEE GSVTNMFTSI
     VGNAFGFKAL RALRLEDLRI SPAYIKTFQG PPHGIQVERD KLNKYGRPLL GCTIKPKLGL
     SAKNYGRACY ECLRGGLDFT KDDENVNSQP FMRWRDRFLF CAEAIYKSQA ETGEIKGHYL
     NATAGTCEEM MKRAVFAREL GVPIIMHDYL TGGFTANTSL AHYCRDNGLL LHIHRAMHAV
     IDRQKNHGIH FRVLAKALRM SGGDHIHSGT VVGKLEGERD ITLGFVDLLR DDFIEKDRSR
     GIYFTQDWVS LPGVIPVASG GIHVWHMPAL TEIFGDDSVL QFGGGTLGHP WGNAPGAVAN
     RVALEACVKA RNEGRDLAQE GNEIIHEACK WSPELAAACE VWREIVFNFA AVDVLDK