CHLN_SYNS9
ID CHLN_SYNS9 Reviewed; 412 AA.
AC Q3AWT6;
DT 18-MAR-2008, integrated into UniProtKB/Swiss-Prot.
DT 18-MAR-2008, sequence version 2.
DT 03-AUG-2022, entry version 86.
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};
GN OrderedLocusNames=Syncc9902_1619;
OS Synechococcus sp. (strain CC9902).
OC Bacteria; Cyanobacteria; Synechococcales; Synechococcaceae; Synechococcus;
OC unclassified Synechococcus.
OX NCBI_TaxID=316279;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=CC9902;
RA Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C., Glavina T.,
RA Hammon N., Israni S., Pitluck S., Martinez M., Schmutz J., Larimer F.,
RA Land M., Kyrpides N., Ivanova N., Richardson P.;
RT "Complete sequence of Synechococcus sp. CC9902.";
RL Submitted (AUG-2005) to the EMBL/GenBank/DDBJ databases.
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}.
CC -!- SEQUENCE CAUTION:
CC Sequence=ABB26577.1; Type=Erroneous initiation; Evidence={ECO:0000305};
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DR EMBL; CP000097; ABB26577.1; ALT_INIT; Genomic_DNA.
DR RefSeq; WP_037988787.1; NC_007513.1.
DR AlphaFoldDB; Q3AWT6; -.
DR SMR; Q3AWT6; -.
DR STRING; 316279.Syncc9902_1619; -.
DR EnsemblBacteria; ABB26577; ABB26577; Syncc9902_1619.
DR KEGG; sye:Syncc9902_1619; -.
DR eggNOG; COG2710; Bacteria.
DR HOGENOM; CLU_037170_0_0_3; -.
DR OrthoDB; 363662at2; -.
DR UniPathway; UPA00670; -.
DR Proteomes; UP000002712; 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..412
FT /note="Light-independent protochlorophyllide reductase
FT subunit N"
FT /id="PRO_0000324028"
FT BINDING 17
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 42
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 103
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 412 AA; 45435 MW; 11D46C868035FCDC CRC64;
MSGPTLLKES GPREVFCGLT SIVWLHRRMP DAFFLVVGSR TCAHLIQSAA GVMIFAEPRF
GTAILNERDL AGLADAQEEL DRVAKELLQR RPEIRTLFLV GSCPSEVIKL DLSRAAERLT
DELQGRVRVV NYSGSGIETT FTQGEDGALA ALIPFLPSSD ERQLLLVGTL ADAVEDRLVH
LFNKLNINAI KSLPPRQSTD LPAVGPGTTV LLTQPYLTTT ARLLKDRGAR VLTAPFPLGA
EGSRRWMETA ARDFEVDEAQ IDSVLSPLME RAQIALAPHR EVLKGKRIFL LPESQLELPL
ARFLQRECGM ELVEVGTPYL NRDQMAEEIA LLPEGTPVME GQHVELQLDR VRDSKPDLVV
CGMGLANPLE AEGIATKWSI ELVFSPIHGI DQAGELAELF SRPLRRHQLL AH
