RBL_XANFL
ID RBL_XANFL Reviewed; 488 AA.
AC P23011;
DT 01-NOV-1991, integrated into UniProtKB/Swiss-Prot.
DT 01-NOV-1991, sequence version 1.
DT 03-AUG-2022, entry version 97.
DE RecName: Full=Ribulose bisphosphate carboxylase large chain {ECO:0000255|HAMAP-Rule:MF_01338};
DE Short=RuBisCO large subunit {ECO:0000255|HAMAP-Rule:MF_01338};
DE EC=4.1.1.39 {ECO:0000255|HAMAP-Rule:MF_01338, ECO:0000269|PubMed:9882445};
GN Name=cbbL {ECO:0000255|HAMAP-Rule:MF_01338}; Synonyms=cfxL;
OS Xanthobacter flavus.
OC Bacteria; Proteobacteria; Alphaproteobacteria; Hyphomicrobiales;
OC Xanthobacteraceae; Xanthobacter.
OX NCBI_TaxID=281;
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC STRAIN=H4-14;
RX PubMed=1900916; DOI=10.1007/bf00269865;
RA Meijer W.G., Arnberg A.C., Enequist H.G., Terpstra P., Lidstrom M.E.,
RA Dijkhuizen L.;
RT "Identification and organization of carbon dioxide fixation genes in
RT Xanthobacter flavus H4-14.";
RL Mol. Gen. Genet. 225:320-330(1991).
RN [2]
RP FUNCTION, CATALYTIC ACTIVITY, AND BIOPHYSICOCHEMICAL PROPERTIES.
RC STRAIN=H4-14;
RX PubMed=9882445; DOI=10.1006/abbi.1998.0979;
RA Horken K.M., Tabita F.R.;
RT "Closely related form I ribulose bisphosphate carboxylase/oxygenase
RT molecules that possess different CO2/O2 substrate specificities.";
RL Arch. Biochem. Biophys. 361:183-194(1999).
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. Both reactions occur simultaneously and in competition at
CC the same active site. {ECO:0000255|HAMAP-Rule:MF_01338,
CC ECO:0000269|PubMed:9882445}.
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; Evidence={ECO:0000255|HAMAP-
CC Rule:MF_01338, ECO:0000269|PubMed:9882445};
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; Evidence={ECO:0000255|HAMAP-Rule:MF_01338,
CC ECO:0000269|PubMed:9882445};
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_01338};
CC Note=Binds 1 Mg(2+) ion per subunit. {ECO:0000255|HAMAP-Rule:MF_01338};
CC -!- BIOPHYSICOCHEMICAL PROPERTIES:
CC Kinetic parameters:
CC KM=23 uM for ribulose 1,5-bisphosphate {ECO:0000269|PubMed:9882445};
CC KM=100 uM for CO(2) {ECO:0000269|PubMed:9882445};
CC Vmax=1.8 umol/min/mg enzyme with CO(2) as substrate
CC {ECO:0000269|PubMed:9882445};
CC Note=The CO(2)/O(2) specificity factor (tau) is 44.;
CC -!- SUBUNIT: Heterohexadecamer of 8 large chains and 8 small chains.
CC {ECO:0000255|HAMAP-Rule:MF_01338, ECO:0000305|PubMed:9882445}.
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'.
CC {ECO:0000255|HAMAP-Rule:MF_01338}.
CC -!- SIMILARITY: Belongs to the RuBisCO large chain family. Type I
CC subfamily. {ECO:0000255|HAMAP-Rule:MF_01338}.
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DR EMBL; X17252; CAA35115.1; -; Genomic_DNA.
DR PIR; S13573; RKQXLX.
DR AlphaFoldDB; P23011; -.
DR SMR; P23011; -.
DR SABIO-RK; P23011; -.
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:0019253; P:reductive pentose-phosphate cycle; IEA:UniProtKB-UniRule.
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 1: Evidence at protein level;
KW Calvin cycle; Carbon dioxide fixation; Lyase; Magnesium; Metal-binding;
KW Monooxygenase; Oxidoreductase.
FT CHAIN 1..488
FT /note="Ribulose bisphosphate carboxylase large chain"
FT /id="PRO_0000062661"
FT ACT_SITE 180
FT /note="Proton acceptor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01338"
FT ACT_SITE 298
FT /note="Proton acceptor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01338"
FT BINDING 128
FT /ligand="substrate"
FT /note="in homodimeric partner"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01338"
FT BINDING 178
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01338"
FT BINDING 182
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01338"
FT BINDING 206
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /note="via carbamate group"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01338"
FT BINDING 208
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01338"
FT BINDING 209
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01338"
FT BINDING 299
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01338"
FT BINDING 331
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01338"
FT BINDING 383
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01338"
FT SITE 338
FT /note="Transition state stabilizer"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01338"
FT MOD_RES 206
FT /note="N6-carboxylysine"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01338"
SQ SEQUENCE 488 AA; 53882 MW; 79194340F2E7DE67 CRC64;
MGADAAIGQI KDAKKRYAAG VLKYAQMGYW DGDYQPKDTD ILALFRVTPQ DGVDPVEAAA
AVAGESSTAT WTVVWTDRLT AADMYRAKAY KVEPVPGQPG QYFCWVAYEL DLFEEGSIAN
LTASIIGNVF SFKPLKACRL EDMRLPVAYV KTFRGPPTGI VVERERLDKF GRPLLGATTK
PKLGLSGKNY GRVVYEGLKG GLDFVKDDEN INSQPFMHWR DRFLYCMEAV NKAQAETGEV
KGHYLNITAG TMEEMYRRAD FAKELGSVVV MVDLIVGWTA IQSISNWCRE NDMLLHMHRA
GHGTYTRQKG HGISFRVIAK WLRLAGVDHL HTGTAVGKLE GDPMTVQGYY NVCREDVTRT
DYTRGIFFDQ DWAGLRKVMP VASGGIHAGQ MHQLIDLFGE DVVLQFGGGT IGHPDGIQAG
AIANRVALET MILARNEGRD IKNEGPEILV EAAKWCQPLR AALDTWGEVT FNYASTDTSD
FVPTASVA
