F4XXR7 · F4XXR7_9CYAN

  • Protein
    Light-independent protochlorophyllide reductase subunit B
  • Gene
    chlB
  • Status
    UniProtKB unreviewed (TrEMBL)
  • Amino acids
  • Protein existence
    Inferred from homology
  • Annotation score
    3/5

Function

function

Component of the dark-operative protochlorophyllide reductase (DPOR) that uses Mg-ATP and reduced ferredoxin to reduce ring D of protochlorophyllide (Pchlide) to form chlorophyllide a (Chlide). This reaction is light-independent. The NB-protein (ChlN-ChlB) is the catalytic component of the complex.

Catalytic activity

Cofactor

[4Fe-4S] cluster (UniProtKB | Rhea| CHEBI:49883 )

Note: Binds 1 [4Fe-4S] cluster per heterodimer. The cluster is bound at the heterodimer interface by residues from both subunits.

Pathway

Porphyrin-containing compound metabolism; bacteriochlorophyll biosynthesis.
Porphyrin-containing compound metabolism; chlorophyll biosynthesis (light-independent).

Features

Showing features for binding site, active site.

Type
IDPosition(s)Description
Binding site36[4Fe-4S] cluster (UniProtKB | ChEBI); ligand shared with heterodimeric partner
Active site294Proton donor
Binding site429-430substrate

GO annotations

AspectTerm
Molecular Function4 iron, 4 sulfur cluster binding
Molecular FunctionATP binding
Molecular Functionmetal ion binding
Molecular Functionoxidoreductase activity, acting on iron-sulfur proteins as donors
Molecular Functionoxidoreductase activity, acting on the CH-CH group of donors, iron-sulfur protein as acceptor
Biological Processbacteriochlorophyll biosynthetic process
Biological Processlight-independent chlorophyll biosynthetic process
Biological Processphotosynthesis, dark reaction

Keywords

Enzyme and pathway databases

Names & Taxonomy

Protein names

  • Recommended name
    Light-independent protochlorophyllide reductase subunit B
  • EC number
  • Short names
    DPOR subunit B
    ; LI-POR subunit B

Gene names

    • Name
      chlB
    • ORF names
      LYNGBM3L_48530

Organism names

  • Taxonomic identifier
  • Organism
  • Strain
    • 3L
  • Taxonomic lineage
    Bacteria > Cyanobacteriota > Cyanophyceae > Oscillatoriophycideae > Oscillatoriales > Oscillatoriaceae > Moorena

Accessions

  • Primary accession
    F4XXR7

Proteomes

Interaction

Subunit

Protochlorophyllide reductase is composed of three subunits; ChlL, ChlN and ChlB. Forms a heterotetramer of two ChlB and two ChlN subunits.

Family & Domains

Features

Showing features for domain.

TypeIDPosition(s)Description
Domain12-426Nitrogenase/oxidoreductase component 1
Domain459-503Light-independent protochlorophyllide reductase subunit B-like C-terminal

Sequence similarities

Belongs to the ChlB/BchB/BchZ family.

Phylogenomic databases

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    508
  • Mass (Da)
    56,921
  • Last updated
    2011-06-28 v1
  • MD5 Checksum
    689E64CBE93B77E3D05B72BFDDF29A53
MKLAYWMYAGPAHIGTLRVASSFKNVHAIMHAPLGDDYFNVMRSMLERERDYTPVTASIVDRNVLARGSQEKVVDNITRKDQEVNPDLIVLTPTCTSSILQEDLENFVNRAQMDAKADVMLADVNHYRVNELQAADRTLDQIIQFYLNKARKKGELPEGKTAKPSVNIIGISTLGFHNQHDCTELKRLMADLGIEVNEVIPEGASVHNLKNLPRAWFNLLPYREIGLMSARYLEEEFSMPYVDIAPLGVVETARCIRKIQEIVNGQGANVDYEEYINNQTLYVSQAAWFSRSIDCQNLTGKKAVVFGDNTHAAAMTKILAREMGIHVVLAGTYCKYDADWFKEQVSEYCDEILISDDNGQIGDAIARIEPAAIFGTQMERHVGKRLNIPCGVIAAPIHIQNFPIGYRPFMGYEGTNQIADLVYNSFTLGMEDHLLEIFGGHDTKEVITKGISADSDLNWSKDAKAELNKVPGFVRGKVKRNTEKFARERGFSEITLEVMYAAKEAVGA

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
GL890949
EMBL· GenBank· DDBJ
EGJ30628.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

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