Q698K4 · Q698K4_LARDC
- ProteinLight-independent protochlorophyllide reductase subunit B
- GenechlB
- StatusUniProtKB unreviewed (TrEMBL)
- Organism
- Amino acids482 (go to sequence)
- Protein existenceInferred from homology
- Annotation score3/5
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
- chlorophyllide a + oxidized 2[4Fe-4S]-[ferredoxin] + 2 ADP + 2 phosphate = protochlorophyllide a + reduced 2[4Fe-4S]-[ferredoxin] + 2 ATP + 2 H2O
CHEBI:83348 + RHEA-COMP:10004 CHEBI:33722 Position: 1CHEBI:33722 Position: 2+ 2 CHEBI:456216 + 2 CHEBI:43474 = CHEBI:83350 + RHEA-COMP:10002 CHEBI:33723 Position: 1CHEBI:33723 Position: 2+ 2 CHEBI:30616 + 2 CHEBI:15377
Cofactor
Pathway
Porphyrin-containing compound metabolism; chlorophyll biosynthesis (light-independent).
GO annotations
Aspect | Term | |
---|---|---|
Cellular Component | chloroplast | |
Molecular Function | 4 iron, 4 sulfur cluster binding | |
Molecular Function | ATP binding | |
Molecular Function | metal ion binding | |
Molecular Function | oxidoreductase activity, acting on iron-sulfur proteins as donors | |
Biological Process | light-independent chlorophyll biosynthetic process | |
Biological Process | photosynthesis, dark reaction |
Keywords
- Molecular function
- Biological process
- Ligand
Enzyme and pathway databases
Names & Taxonomy
Protein names
- Recommended nameLight-independent protochlorophyllide reductase subunit B
- EC number
Gene names
Encoded on
- Chloroplast
Organism names
- Organism
- Taxonomic lineageEukaryota > Viridiplantae > Streptophyta > Embryophyta > Tracheophyta > Spermatophyta > Pinopsida > Pinidae > Conifers I > Pinales > Pinaceae > Larix
Accessions
- Primary accessionQ698K4
Subcellular Location
UniProt Annotation
GO Annotation
Keywords
- Cellular component
Interaction
Subunit
Protochlorophyllide reductase is composed of three subunits; ChlL, ChlN and ChlB. Forms a heterotetramer of two ChlB and two ChlN subunits.
Structure
Family & Domains
Features
Showing features for domain.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Domain | 12-431 | Nitrogenase/oxidoreductase component 1 | ||||
Sequence: AHIGTLRVASSFKNVHAIMHAPLGDDYFNVMRSMLERERNFTPATASIVDRHVLARGSKKRVVDNILRKDKEEGPNLIILTPTCTSSILQEDLKNFVDRASIISDCNVIFADVDHYQVNEIQAADRTLEQVVRYYLEKSHRQETLDQFVTDAPSVNIIGILTLGFHNRHDCRELRRLLKDLDIRINQIIPEGGSVEDPKNLPKARFNLIPYREVGLMTAMYLNKEFGMPYVSTTPMGAVDMAACIRQIKKYLDTLAAPILSSKRVDYESYIDGQTRFVSQAAWFSRSIDCQNFTGKETVVFGDATHAASITKILAREMGIRVSCTGTYCKHDAEWFKEQIKDFCDEIIITDDHAEVGDIIARVEPSAIFGTQMERHIGKRLEIPCGVISAPAHIQNFSLGYRPFLGYEGTNQIADPVYNS |
Sequence similarities
Belongs to the ChlB/BchB/BchZ family.
Family and domain databases
Sequence
- Sequence statusFragment
- Length482
- Mass (Da)54,656
- Last updated2004-09-13 v1
- ChecksumE5AA1667BCC9FA33
Features
Showing features for non-terminal residue.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Non-terminal residue | 482 | |||||
Sequence: D |