CHLB_HUPLU
ID CHLB_HUPLU Reviewed; 511 AA.
AC Q5SCX2;
DT 21-JUN-2005, integrated into UniProtKB/Swiss-Prot.
DT 21-DEC-2004, sequence version 1.
DT 03-AUG-2022, entry version 64.
DE RecName: Full=Light-independent protochlorophyllide reductase subunit B {ECO:0000255|HAMAP-Rule:MF_00353};
DE Short=DPOR subunit B {ECO:0000255|HAMAP-Rule:MF_00353};
DE Short=LI-POR subunit B {ECO:0000255|HAMAP-Rule:MF_00353};
DE EC=1.3.7.7 {ECO:0000255|HAMAP-Rule:MF_00353};
GN Name=chlB {ECO:0000255|HAMAP-Rule:MF_00353};
OS Huperzia lucidula (Shining clubmoss) (Lycopodium lucidulum).
OG Plastid; Chloroplast.
OC Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC Lycopodiopsida; Lycopodiales; Lycopodiaceae; Huperzioideae; Huperzia.
OX NCBI_TaxID=37429;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RX PubMed=15788152; DOI=10.1016/j.gene.2005.01.018;
RA Wolf P.G., Karol K.G., Mandoli D.F., Kuehl J.V., Arumuganathan K.,
RA Ellis M.W., Mishler B.D., Kelch D.G., Olmstead R.G., Boore J.L.;
RT "The first complete chloroplast genome sequence of a lycophyte, Huperzia
RT lucidula (Lycopodiaceae).";
RL Gene 350:117-128(2005).
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_00353}.
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_00353};
CC -!- COFACTOR:
CC Name=[4Fe-4S] cluster; Xref=ChEBI:CHEBI:49883;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_00353};
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_00353};
CC -!- PATHWAY: Porphyrin-containing compound metabolism; chlorophyll
CC biosynthesis (light-independent). {ECO:0000255|HAMAP-Rule:MF_00353}.
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_00353}.
CC -!- SUBCELLULAR LOCATION: Plastid, chloroplast.
CC -!- SIMILARITY: Belongs to the ChlB/BchB/BchZ family. {ECO:0000255|HAMAP-
CC Rule:MF_00353}.
CC ---------------------------------------------------------------------------
CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC ---------------------------------------------------------------------------
DR EMBL; AY660566; AAT80735.1; -; Genomic_DNA.
DR RefSeq; YP_209539.1; NC_006861.1.
DR AlphaFoldDB; Q5SCX2; -.
DR SMR; Q5SCX2; -.
DR GeneID; 3283710; -.
DR UniPathway; UPA00670; -.
DR GO; GO:0009507; C:chloroplast; IEA:UniProtKB-SubCell.
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 Gene3D; 1.10.8.550; -; 1.
DR HAMAP; MF_00353; ChlB_BchB; 1.
DR InterPro; IPR013580; LI-POR_suB-like_C.
DR InterPro; IPR000510; Nase/OxRdtase_comp1.
DR InterPro; IPR042298; P-CP_red_C.
DR InterPro; IPR005969; Protochl_reductB.
DR InterPro; IPR016209; Protochlorophyllide_Rdtase.
DR Pfam; PF00148; Oxidored_nitro; 1.
DR Pfam; PF08369; PCP_red; 1.
DR PIRSF; PIRSF000163; PCP_ChlB; 1.
DR TIGRFAMs; TIGR01278; DPOR_BchB; 1.
PE 3: Inferred from homology;
KW 4Fe-4S; ATP-binding; Chlorophyll biosynthesis; Chloroplast; Iron;
KW Iron-sulfur; Metal-binding; Nucleotide-binding; Oxidoreductase;
KW Photosynthesis; Plastid.
FT CHAIN 1..511
FT /note="Light-independent protochlorophyllide reductase
FT subunit B"
FT /id="PRO_0000219825"
FT ACT_SITE 299
FT /note="Proton donor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00353"
FT BINDING 36
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_00353"
FT BINDING 434..435
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00353"
SQ SEQUENCE 511 AA; 58169 MW; 707003F48A958E29 CRC64;
MKLVYWMYAG PAHIGTLRVA SSFKNVHAIM HAPLGDDYFN VMRSMLERER DFTPVTASIV
DRHVLTRGSQ DKVVDNITRK DKEERPNLII LTPTCTSSIL QEDLQNFVDR ASIISDSDVI
LADVNHYRVN ELQAADKTLE QVVRYYLGKA RRRRTLDQSI TDVPSANIIG ISTLGFHNQH
DFRELKRLLQ DLGIKINQVI PEGSFVEDLE NLPKAWFNFV PYREIGLMTA VYLEKEFGIP
YVSVTPMGVV DTAKCIRQIQ KHINNLAVVA LEETVDYEPY VYQQTQFVSQ AIWFSKSIDC
QNLKKKKAVI FGDATHAASM TKILNREMGI RVSCAGTYCK HDKEWFNEQV HNFCDEVLIT
DDHAEVANKV ARIEPSAIFG TQMERHIGKR LNIPCGVVSA PVHIQNFPLG YRPFSGYEGT
NQIADSVYNS FIPGMEDHFI DLFGGHDTKE VIMKSLCTEK GVIWDPESQL ELSKIPSFMR
SKIKRKIDKF AVHNGFTKIN IKIMYAALIC L
