A0A2U8GKU5 · A0A2U8GKU5_9CHLO
- ProteinLight-independent protochlorophyllide reductase subunit N
- GenechlN
- StatusUniProtKB unreviewed (TrEMBL)
- Organism
- Amino acids461 (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
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; chlorophyll biosynthesis (light-independent).
Features
Showing features for binding site.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Binding site | 29 | [4Fe-4S] cluster (UniProtKB | ChEBI); ligand shared with heterodimeric partner | |||
Binding site | 54 | [4Fe-4S] cluster (UniProtKB | ChEBI); ligand shared with heterodimeric partner | |||
Binding site | 114 | [4Fe-4S] cluster (UniProtKB | ChEBI); ligand shared with heterodimeric partner | |||
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 | |
Molecular Function | oxidoreductase activity, acting on the CH-CH group of donors, iron-sulfur protein as acceptor | |
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 N
- EC number
- Short namesDPOR subunit N ; LI-POR subunit N
Gene names
Encoded on
- Chloroplast
Organism names
- Organism
- Taxonomic lineageEukaryota > Viridiplantae > Chlorophyta > core chlorophytes > Chlorophyceae > CS clade > Sphaeropleales > Hydrodictyaceae > Pseudopediastrum
Accessions
- Primary accessionA0A2U8GKU5
Subcellular Location
Interaction
Subunit
Protochlorophyllide reductase is composed of three subunits; ChlL, ChlN and ChlB. Forms a heterotetramer of two ChlB and two ChlN subunits.
Structure
Sequence
- Sequence statusComplete
- Length461
- Mass (Da)52,411
- Last updated2018-09-12 v1
- Checksum0FC23F1EA70788A6
Sequence databases
Nucleotide Sequence | Protein Sequence | Molecule Type | Status | |
---|---|---|---|---|
MF276984 EMBL· GenBank· DDBJ | AWI68790.1 EMBL· GenBank· DDBJ | Genomic DNA |