ID   CHLI_ANAVA              Reviewed;         338 AA.
AC   Q44498;
DT   15-JUL-1998, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1996, sequence version 1.
DT   03-AUG-2022, entry version 74.
DE   RecName: Full=Magnesium-chelatase subunit ChlI;
DE            EC=6.6.1.1;
DE   AltName: Full=Mg-protoporphyrin IX chelatase;
DE   Flags: Fragment;
GN   Name=chlI;
OS   Anabaena variabilis.
OC   Bacteria; Cyanobacteria; Nostocales; Nostocaceae; Trichormus.
OX   NCBI_TaxID=264691;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=M3;
RA   Sato N.;
RL   Submitted (MAR-1995) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Involved in chlorophyll biosynthesis; introduces a magnesium
CC       ion into protoporphyrin IX to yield Mg-protoporphyrin IX.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=ATP + H2O + Mg(2+) + protoporphyrin IX = ADP + 3 H(+) + Mg-
CC         protoporphyrin IX + phosphate; Xref=Rhea:RHEA:13961,
CC         ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:18420,
CC         ChEBI:CHEBI:30616, ChEBI:CHEBI:43474, ChEBI:CHEBI:57306,
CC         ChEBI:CHEBI:60492, ChEBI:CHEBI:456216; EC=6.6.1.1;
CC   -!- PATHWAY: Porphyrin-containing compound metabolism; chlorophyll
CC       biosynthesis.
CC   -!- SIMILARITY: Belongs to the Mg-chelatase subunits D/I family.
CC       {ECO:0000305}.
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DR   EMBL; D49426; BAA08404.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q44498; -.
DR   SMR; Q44498; -.
DR   UniPathway; UPA00668; -.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-KW.
DR   GO; GO:0016851; F:magnesium chelatase activity; IEA:UniProtKB-EC.
DR   GO; GO:0015995; P:chlorophyll biosynthetic process; IEA:UniProtKB-UniPathway.
DR   GO; GO:0015979; P:photosynthesis; IEA:UniProtKB-KW.
DR   Gene3D; 3.40.50.300; -; 1.
DR   InterPro; IPR003593; AAA+_ATPase.
DR   InterPro; IPR045006; CHLI-like.
DR   InterPro; IPR041628; ChlI/MoxR_AAA_lid.
DR   InterPro; IPR011775; Mg_chelatase_ATPase-isu.
DR   InterPro; IPR000523; Mg_chelatse_chII-like_cat_dom.
DR   InterPro; IPR027417; P-loop_NTPase.
DR   PANTHER; PTHR32039; PTHR32039; 1.
DR   Pfam; PF17863; AAA_lid_2; 1.
DR   Pfam; PF01078; Mg_chelatase; 1.
DR   SMART; SM00382; AAA; 1.
DR   SUPFAM; SSF52540; SSF52540; 1.
DR   TIGRFAMs; TIGR02030; BchI-ChlI; 1.
PE   3: Inferred from homology;
KW   ATP-binding; Chlorophyll biosynthesis; Ligase; Nucleotide-binding;
KW   Photosynthesis.
FT   CHAIN           <1..338
FT                   /note="Magnesium-chelatase subunit ChlI"
FT                   /id="PRO_0000206862"
FT   BINDING         11..18
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255"
FT   NON_TER         1
SQ   SEQUENCE   338 AA;  37344 MW;  22EB8359244C8AE6 CRC64;
     DPKIGGVMIM GDRGTGKSTT IRALADLLPE IPVVANDPFN SDPSDPDLMS DEVRQKSGTG
     AEIPIEFKKV QMVDLPLGAT EDRVCGTIDI EKALSEGVKA FEPGLLAKAN RGILYVDEVN
     LLDDHLVDVL LDSAASGWNT VEREGISIRH PARFVLVGSG NPEEGELRPQ LLDRFGMHAE
     IHTVKEPALR VQIVEQRSEF DQNPPTFLEK YNPEQTALQK KIVEAQKLLP EVKLDYDLRV
     KISEVCSELD VDGLRGDIVT NRAAKALTAY EGRTEVTVDD IRRVITLCLR HRLRKDPLES
     IDSGYKVEKV FARIFGVELL EDDSSQKNGA GQIKTGVR