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CHLN_SYNJB
ID   CHLN_SYNJB              Reviewed;         466 AA.
AC   Q2JMP5;
DT   18-MAR-2008, integrated into UniProtKB/Swiss-Prot.
DT   07-MAR-2006, sequence version 1.
DT   03-AUG-2022, entry version 83.
DE   RecName: Full=Light-independent protochlorophyllide reductase subunit N {ECO:0000255|HAMAP-Rule:MF_00352};
DE            Short=DPOR subunit N {ECO:0000255|HAMAP-Rule:MF_00352};
DE            Short=LI-POR subunit N {ECO:0000255|HAMAP-Rule:MF_00352};
DE            EC=1.3.7.7 {ECO:0000255|HAMAP-Rule:MF_00352};
GN   Name=chlN {ECO:0000255|HAMAP-Rule:MF_00352}; OrderedLocusNames=CYB_1013;
OS   Synechococcus sp. (strain JA-2-3B'a(2-13)) (Cyanobacteria bacterium
OS   Yellowstone B-Prime).
OC   Bacteria; Cyanobacteria; Synechococcales; Synechococcaceae; Synechococcus;
OC   unclassified Synechococcus.
OX   NCBI_TaxID=321332;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=JA-2-3B'a(2-13);
RX   PubMed=18059494; DOI=10.1038/ismej.2007.46;
RA   Bhaya D., Grossman A.R., Steunou A.-S., Khuri N., Cohan F.M., Hamamura N.,
RA   Melendrez M.C., Bateson M.M., Ward D.M., Heidelberg J.F.;
RT   "Population level functional diversity in a microbial community revealed by
RT   comparative genomic and metagenomic analyses.";
RL   ISME J. 1:703-713(2007).
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:0000255|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:0000255|HAMAP-Rule:MF_00352};
CC   -!- COFACTOR:
CC       Name=[4Fe-4S] cluster; Xref=ChEBI:CHEBI:49883;
CC         Evidence={ECO:0000255|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:0000255|HAMAP-Rule:MF_00352};
CC   -!- PATHWAY: Porphyrin-containing compound metabolism; chlorophyll
CC       biosynthesis (light-independent). {ECO:0000255|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:0000255|HAMAP-Rule:MF_00352}.
CC   -!- SIMILARITY: Belongs to the BchN/ChlN family. {ECO:0000255|HAMAP-
CC       Rule:MF_00352}.
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DR   EMBL; CP000240; ABD01992.1; -; Genomic_DNA.
DR   RefSeq; WP_011432647.1; NC_007776.1.
DR   AlphaFoldDB; Q2JMP5; -.
DR   SMR; Q2JMP5; -.
DR   STRING; 321332.CYB_1013; -.
DR   KEGG; cyb:CYB_1013; -.
DR   eggNOG; COG2710; Bacteria.
DR   HOGENOM; CLU_037170_0_0_3; -.
DR   OMA; ISCVAWL; -.
DR   OrthoDB; 363662at2; -.
DR   UniPathway; UPA00670; -.
DR   Proteomes; UP000001938; 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   HAMAP; MF_00352; ChlN_BchN; 1.
DR   InterPro; IPR000510; Nase/OxRdtase_comp1.
DR   InterPro; IPR005970; Protochl_reductN.
DR   Pfam; PF00148; Oxidored_nitro; 1.
DR   PIRSF; PIRSF000162; P_chlorophyll_rd; 1.
DR   TIGRFAMs; TIGR01279; DPOR_bchN; 1.
PE   3: Inferred from homology;
KW   4Fe-4S; ATP-binding; Chlorophyll biosynthesis; Iron; Iron-sulfur;
KW   Metal-binding; Nucleotide-binding; Oxidoreductase; Photosynthesis;
KW   Reference proteome.
FT   CHAIN           1..466
FT                   /note="Light-independent protochlorophyllide reductase
FT                   subunit N"
FT                   /id="PRO_0000324029"
FT   BINDING         24
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /ligand_note="ligand shared with heterodimeric partner"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00352"
FT   BINDING         49
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /ligand_note="ligand shared with heterodimeric partner"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00352"
FT   BINDING         109
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /ligand_note="ligand shared with heterodimeric partner"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00352"
SQ   SEQUENCE   466 AA;  52206 MW;  957467396868060A CRC64;
     MNAALDSANA LNFQCETGNY HTFCPISCVA WLYQKIEDSF FLVIGTKTCG YFLQNAMGVM
     IFAEPRYAMA ELEEGDISAK LNDYEELKRL CLQIQRDRNP SVIVWIGTCT TEIIKMDLEG
     LAQKLEGEIG IPIVVARANG LDYAFTQGED TVLASMAQRC PEQVRAEEQE TRGGLQALFY
     GLRSGKKKEE EGFHKHPPLV IFGSVPDPVV TQLTLELKKH GIRVSGWLPA KRYGELPAIE
     PGTYVVGVNP FLSRTATTLV RRKKAKLITA PFPIGPDGTR AWIEAIAREL GIPTQGLAER
     EAEVWNHPQV RDYRELLRGK SVFFMGDNLL EISLARFLVR CGMTVQEIGI PYMDKRYQAA
     ELALLERTCE EMGVPKPTIV EKPDNYNQIQ RIKALQPDLV ITGMAHANPL EARGITTKWS
     VEFTFAQIHG FGNTQALLEL VTRPLRRNAA LKGLGWERLV REEAPI
 
 
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