ID   K9U9Z7_CHAP6            Unreviewed;       476 AA.
AC   K9U9Z7;
DT   06-MAR-2013, integrated into UniProtKB/TrEMBL.
DT   06-MAR-2013, sequence version 1.
DT   27-MAR-2024, entry version 58.
DE   RecName: Full=Ribulose bisphosphate carboxylase large chain {ECO:0000256|HAMAP-Rule:MF_01338};
DE            Short=RuBisCO large subunit {ECO:0000256|HAMAP-Rule:MF_01338};
DE            EC=4.1.1.39 {ECO:0000256|HAMAP-Rule:MF_01338};
GN   Name=cbbL {ECO:0000256|HAMAP-Rule:MF_01338};
GN   Synonyms=rbcL {ECO:0000256|HAMAP-Rule:MF_01338};
GN   ORFNames=Cha6605_0645 {ECO:0000313|EMBL:AFY91922.1};
OS   Chamaesiphon minutus (strain ATCC 27169 / PCC 6605).
OC   Bacteria; Cyanobacteriota; Cyanophyceae; Gomontiellales; Chamaesiphonaceae;
OC   Chamaesiphon.
OX   NCBI_TaxID=1173020 {ECO:0000313|EMBL:AFY91922.1, ECO:0000313|Proteomes:UP000010366};
RN   [1] {ECO:0000313|EMBL:AFY91922.1, ECO:0000313|Proteomes:UP000010366}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 27169 / PCC 6605 {ECO:0000313|Proteomes:UP000010366};
RG   US DOE Joint Genome Institute;
RA   Gugger M., Coursin T., Rippka R., Tandeau De Marsac N., Huntemann M.,
RA   Wei C.-L., Han J., Detter J.C., Han C., Tapia R., Chen A., Kyrpides N.,
RA   Mavromatis K., Markowitz V., Szeto E., Ivanova N., Pagani I., Pati A.,
RA   Goodwin L., Nordberg H.P., Cantor M.N., Hua S.X., Woyke T., Kerfeld C.A.;
RT   "Finished chromosome of genome of Chamaesiphon sp. PCC 6605.";
RL   Submitted (MAY-2012) to the EMBL/GenBank/DDBJ databases.
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.
CC       {ECO:0000256|HAMAP-Rule:MF_01338}.
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         Evidence={ECO:0000256|ARBA:ARBA00001067, ECO:0000256|HAMAP-
CC         Rule:MF_01338};
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:0000256|HAMAP-Rule:MF_01338};
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420; Evidence={ECO:0000256|HAMAP-
CC         Rule:MF_01338};
CC       Note=Binds 1 Mg(2+) ion per subunit. {ECO:0000256|HAMAP-Rule:MF_01338};
CC   -!- SUBUNIT: Heterohexadecamer of 8 large chains and 8 small chains.
CC       {ECO:0000256|HAMAP-Rule:MF_01338}.
CC   -!- SUBCELLULAR LOCATION: Carboxysome {ECO:0000256|ARBA:ARBA00023587,
CC       ECO:0000256|HAMAP-Rule:MF_01338}.
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:0000256|HAMAP-Rule:MF_01338}.
CC   -!- SIMILARITY: Belongs to the RuBisCO large chain family. Type I
CC       subfamily. {ECO:0000256|HAMAP-Rule:MF_01338}.
CC   -!- CAUTION: Lacks conserved residue(s) required for the propagation of
CC       feature annotation. {ECO:0000256|HAMAP-Rule:MF_01338}.
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DR   EMBL; CP003600; AFY91922.1; -; Genomic_DNA.
DR   RefSeq; WP_015158116.1; NC_019697.1.
DR   AlphaFoldDB; K9U9Z7; -.
DR   STRING; 1173020.Cha6605_0645; -.
DR   KEGG; cmp:Cha6605_0645; -.
DR   PATRIC; fig|1173020.3.peg.756; -.
DR   eggNOG; COG1850; Bacteria.
DR   HOGENOM; CLU_031450_2_0_3; -.
DR   OrthoDB; 9770811at2; -.
DR   Proteomes; UP000010366; Chromosome.
DR   GO; GO:0031470; C:carboxysome; 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:0009853; P:photorespiration; IEA:UniProtKB-KW.
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; Ribulose bisphosphate carboxylase, large subunit, C-terminal domain; 1.
DR   Gene3D; 3.30.70.150; RuBisCO large subunit, N-terminal domain; 1.
DR   HAMAP; MF_01338; RuBisCO_L_type1; 1.
DR   InterPro; IPR033966; RuBisCO.
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; RIBULOSE BISPHOSPHATE CARBOXYLASE; 1.
DR   PANTHER; PTHR42704:SF9; RIBULOSE BISPHOSPHATE CARBOXYLASE LARGE CHAIN; 1.
DR   Pfam; PF00016; RuBisCO_large; 1.
DR   Pfam; PF02788; RuBisCO_large_N; 1.
DR   SFLD; SFLDG01052; RuBisCO; 1.
DR   SFLD; SFLDS00014; RuBisCO; 1.
DR   SFLD; SFLDG00301; RuBisCO-like_proteins; 1.
DR   SUPFAM; SSF51649; RuBisCo, C-terminal domain; 1.
DR   SUPFAM; SSF54966; RuBisCO, large subunit, small (N-terminal) domain; 1.
PE   3: Inferred from homology;
KW   Bacterial microcompartment {ECO:0000256|ARBA:ARBA00024446};
KW   Calvin cycle {ECO:0000256|ARBA:ARBA00022567, ECO:0000256|HAMAP-
KW   Rule:MF_01338};
KW   Carbon dioxide fixation {ECO:0000256|ARBA:ARBA00023300, ECO:0000256|HAMAP-
KW   Rule:MF_01338};
KW   Carboxysome {ECO:0000256|ARBA:ARBA00023669, ECO:0000256|HAMAP-
KW   Rule:MF_01338};
KW   Lyase {ECO:0000256|ARBA:ARBA00023239, ECO:0000256|HAMAP-Rule:MF_01338};
KW   Magnesium {ECO:0000256|HAMAP-Rule:MF_01338};
KW   Metal-binding {ECO:0000256|HAMAP-Rule:MF_01338};
KW   Monooxygenase {ECO:0000256|ARBA:ARBA00023033, ECO:0000256|HAMAP-
KW   Rule:MF_01338};
KW   Oxidoreductase {ECO:0000256|ARBA:ARBA00023002, ECO:0000256|HAMAP-
KW   Rule:MF_01338}; Photorespiration {ECO:0000256|HAMAP-Rule:MF_01338};
KW   Reference proteome {ECO:0000313|Proteomes:UP000010366}.
FT   DOMAIN          25..145
FT                   /note="Ribulose bisphosphate carboxylase large subunit
FT                   ferrodoxin-like N-terminal"
FT                   /evidence="ECO:0000259|Pfam:PF02788"
FT   DOMAIN          155..463
FT                   /note="Ribulose bisphosphate carboxylase large subunit C-
FT                   terminal"
FT                   /evidence="ECO:0000259|Pfam:PF00016"
FT   ACT_SITE        176
FT                   /note="Proton acceptor"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01338"
FT   ACT_SITE        295
FT                   /note="Proton acceptor"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01338"
FT   BINDING         124
FT                   /ligand="substrate"
FT                   /note="in homodimeric partner"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01338"
FT   BINDING         174
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01338"
FT   BINDING         178
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01338"
FT   BINDING         202
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /note="via carbamate group"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01338"
FT   BINDING         204
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01338"
FT   BINDING         205
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01338"
FT   BINDING         296
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01338"
FT   BINDING         328
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01338"
FT   BINDING         380
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01338"
FT   SITE            335
FT                   /note="Transition state stabilizer"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01338"
FT   MOD_RES         202
FT                   /note="N6-carboxylysine"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01338"
SQ   SEQUENCE   476 AA;  53038 MW;  9DB9A72A859A1E50 CRC64;
     MAYAQTQTQA KSGYKAGVQD YRLTYYTPDY TPKDTDLLAA FRMTPQPGVP AEEAAAAVAA
     ESSTGTWTTV WTDLLTDLDR YKGRCYHIEP VQGEDNQYFC FIAYPLDLFE EGSVTNMLTS
     LVGNVFGFKA LRALRLEDLR IPVAYLKTFQ GPPHGITVER DKLNKYGRPL LGCTIKPKLG
     LSAKNYGRAV YEVLRGGLDL TKDDENINSQ PFMRWRDRFL FVQEAIEKAQ AETGEIKGHY
     LNVTAPTNEQ MMERAQFAKE IGTPIIMHDF LTGGFTANTS LAKWCQANGI LLHIHRAMHA
     VIDRQKNHGI HFRVLAKCLR MSGGDHLHSG TVVGKLEGEK GITMGFVDLM RENYIEEDRS
     RGIFFTQDWA SMPGVFPVAS GGIHVWHMPA LVEIFGDDSC LQFGGGTAGH PWGNAPGATA
     NRVALEACIQ ARNEGRNLMR EGGDVLREAG KWSPELAVAL ELWKEIKFEF EAMDTL
//