ID A0A2Z5TG17_9CYAN Unreviewed; 462 AA.
AC A0A2Z5TG17;
DT 10-OCT-2018, integrated into UniProtKB/TrEMBL.
DT 10-OCT-2018, sequence version 1.
DT 27-MAR-2024, entry version 16.
DE RecName: Full=Light-independent protochlorophyllide reductase subunit N {ECO:0000256|HAMAP-Rule:MF_00352};
DE Short=DPOR subunit N {ECO:0000256|HAMAP-Rule:MF_00352};
DE Short=LI-POR subunit N {ECO:0000256|HAMAP-Rule:MF_00352};
DE EC=1.3.7.7 {ECO:0000256|HAMAP-Rule:MF_00352};
GN Name=chlN {ECO:0000256|HAMAP-Rule:MF_00352};
GN ORFNames=RGRSB_0505 {ECO:0000313|EMBL:BBA79080.1};
OS cyanobacterium endosymbiont of Rhopalodia gibberula.
OC Bacteria; Cyanobacteriota.
OX NCBI_TaxID=1763363 {ECO:0000313|EMBL:BBA79080.1, ECO:0000313|Proteomes:UP000264686};
RN [1] {ECO:0000313|EMBL:BBA79080.1, ECO:0000313|Proteomes:UP000264686}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=RgSB {ECO:0000313|EMBL:BBA79080.1};
RX PubMed=29026213; DOI=10.1038/s41598-017-13578-8;
RA Nakayama T., Inagaki Y.;
RT "Genomic divergence within non-photosynthetic cyanobacterial endosymbionts
RT in rhopalodiacean diatoms.";
RL Sci. Rep. 7:13075-13075(2017).
CC -!- FUNCTION: Component of the dark-operative protochlorophyllide reductase
CC (DPOR) that uses Mg-ATP and reduced ferredoxin to reduce ring D of
CC protochlorophyllide (Pchlide) to form chlorophyllide a (Chlide). This
CC reaction is light-independent. The NB-protein (ChlN-ChlB) is the
CC catalytic component of the complex. {ECO:0000256|HAMAP-Rule:MF_00352}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=2 ADP + chlorophyllide a + oxidized 2[4Fe-4S]-[ferredoxin] + 2
CC phosphate = 2 ATP + 2 H2O + protochlorophyllide a + reduced 2[4Fe-
CC 4S]-[ferredoxin]; Xref=Rhea:RHEA:28202, Rhea:RHEA-COMP:10002,
CC Rhea:RHEA-COMP:10004, ChEBI:CHEBI:15377, ChEBI:CHEBI:30616,
CC ChEBI:CHEBI:33722, ChEBI:CHEBI:33723, ChEBI:CHEBI:43474,
CC ChEBI:CHEBI:83348, ChEBI:CHEBI:83350, ChEBI:CHEBI:456216; EC=1.3.7.7;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_00352};
CC -!- COFACTOR:
CC Name=[4Fe-4S] cluster; Xref=ChEBI:CHEBI:49883;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_00352};
CC Note=Binds 1 [4Fe-4S] cluster per heterodimer. The cluster is bound at
CC the heterodimer interface by residues from both subunits.
CC {ECO:0000256|HAMAP-Rule:MF_00352};
CC -!- PATHWAY: Porphyrin-containing compound metabolism; chlorophyll
CC biosynthesis (light-independent). {ECO:0000256|HAMAP-Rule:MF_00352}.
CC -!- SUBUNIT: Protochlorophyllide reductase is composed of three subunits;
CC ChlL, ChlN and ChlB. Forms a heterotetramer of two ChlB and two ChlN
CC subunits. {ECO:0000256|HAMAP-Rule:MF_00352}.
CC -!- SIMILARITY: Belongs to the BchN/ChlN family. {ECO:0000256|HAMAP-
CC Rule:MF_00352}.
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DR EMBL; AP018341; BBA79080.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A2Z5TG17; -.
DR KEGG; cer:RGRSB_0505; -.
DR OrthoDB; 5714774at2; -.
DR UniPathway; UPA00670; -.
DR Proteomes; UP000264686; Chromosome.
DR GO; GO:0051539; F:4 iron, 4 sulfur cluster binding; IEA:UniProtKB-UniRule.
DR GO; GO:0005524; F:ATP binding; IEA:UniProtKB-UniRule.
DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR GO; GO:0016730; F:oxidoreductase activity, acting on iron-sulfur proteins as donors; IEA:InterPro.
DR GO; GO:0016636; F:oxidoreductase activity, acting on the CH-CH group of donors, iron-sulfur protein as acceptor; IEA:UniProtKB-UniRule.
DR GO; GO:0036068; P:light-independent chlorophyll biosynthetic process; IEA:UniProtKB-UniPathway.
DR GO; GO:0019685; P:photosynthesis, dark reaction; IEA:InterPro.
DR CDD; cd01979; Pchlide_reductase_N; 1.
DR Gene3D; 3.40.50.1980; Nitrogenase molybdenum iron protein domain; 3.
DR HAMAP; MF_00352; ChlN_BchN; 1.
DR InterPro; IPR000510; Nase/OxRdtase_comp1.
DR InterPro; IPR005970; Protochl_reductN.
DR NCBIfam; TIGR01279; DPOR_bchN; 1.
DR PANTHER; PTHR39429; LIGHT-INDEPENDENT PROTOCHLOROPHYLLIDE REDUCTASE SUBUNIT N; 1.
DR PANTHER; PTHR39429:SF3; LIGHT-INDEPENDENT PROTOCHLOROPHYLLIDE REDUCTASE SUBUNIT N; 1.
DR Pfam; PF00148; Oxidored_nitro; 1.
DR PIRSF; PIRSF000162; P_chlorophyll_rd; 1.
DR SUPFAM; SSF53807; Helical backbone' metal receptor; 1.
PE 3: Inferred from homology;
KW 4Fe-4S {ECO:0000256|HAMAP-Rule:MF_00352};
KW ATP-binding {ECO:0000256|HAMAP-Rule:MF_00352};
KW Chlorophyll biosynthesis {ECO:0000256|ARBA:ARBA00023171, ECO:0000256|HAMAP-
KW Rule:MF_00352}; Iron {ECO:0000256|HAMAP-Rule:MF_00352};
KW Iron-sulfur {ECO:0000256|HAMAP-Rule:MF_00352};
KW Metal-binding {ECO:0000256|HAMAP-Rule:MF_00352};
KW Nucleotide-binding {ECO:0000256|HAMAP-Rule:MF_00352};
KW Oxidoreductase {ECO:0000256|ARBA:ARBA00023002, ECO:0000256|HAMAP-
KW Rule:MF_00352};
KW Photosynthesis {ECO:0000256|ARBA:ARBA00022531, ECO:0000256|HAMAP-
KW Rule:MF_00352}; Reference proteome {ECO:0000313|Proteomes:UP000264686}.
FT DOMAIN 23..439
FT /note="Nitrogenase/oxidoreductase component 1"
FT /evidence="ECO:0000259|Pfam:PF00148"
FT BINDING 23
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /ligand_note="ligand shared with heterodimeric partner"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00352"
FT BINDING 48
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /ligand_note="ligand shared with heterodimeric partner"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00352"
FT BINDING 108
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /ligand_note="ligand shared with heterodimeric partner"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00352"
SQ SEQUENCE 462 AA; 52582 MW; 73DB8B8DCBD8C67E CRC64;
MTATHKPTAL QFDCETGNYH TFCPISCVAW LYQKIEDSFF LVIGTKTCGY FLQNAMGVMI
FAEPRYAMAE LEEGDISAQL KDYEELKRLC LQIKRDRNPS VIVWIGTCTT EIIQMDLEGL
APKLEEEISI PIITARANGL DYAFTQGEDT VLAAMAHKCP KEREKEERSA IPKLLNFGRK
KENVTQDNSE YIDHPSLVLF GSLPDPVVTN LTLELKKQGV RISGWLPSKH YTELPVINEG
YYVSGVSPFL SRTATTLIRR RKCKLISAPF PIGPDGTRAW IEKICSVFNI ETKGLEEREA
KIWENLEDYI KLIRGKSVFF MGDNLLEISL ARFLISCGMT CPEIGIPYMD KLYQKAELDL
LEKTCKKMGV PIPKIVEKPD NYNQIKRIYE LKPDLVITGM AHANPLEARG INTKWSVEFT
FAQIHGFTNA RDILELVTRP LRRNNNLKEL GWEKLVKEEA NV
//