MolNFT v1 · #151568 · protein
C-phycocyanin from heterocyst forming filamentous cyanobacterium nostoc sp. WR13
6HRN · Alpha subunit of cyanobacterial phycocyanin protein: “C-phycocyanin from heterocyst forming filamentous cyanobacterium nostoc sp. WR13”. X-ray diffraction, 3 ligands (CYC, PO4, NO3), 2 pockets (best druggability 0.61). MolNFT v1…
- PDB
- 6HRN
- Type
- protein
- Length
- 334 residues
- Chains
- 2
- Method
- x-ray diffraction
- Collection
- MolNFT v1 / PDB
- Contract
- 0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
- Owner
- 0x3396CDB397284571d12822B4ae1189a8E22AAAAA
- Molecule
- Alpha subunit of cyanobacterial phycocyanin protein; Beta subunit of cyanobacterial…
- Ligands
- CYC, PO4, NO3
- Pockets
- 2 · best druggability 0.61
Structure
x-ray diffraction · 2 distinct chains · 77% helix, 0% strand (DSSP).
| Chain | Molecule | Type | Residues | Secondary structure | UniProt |
|---|---|---|---|---|---|
| A | Alpha subunit of cyanobacterial phycocyanin protein | protein | 162 | 78% helix, 0% strand | — |
| B | Beta subunit of cyanobacterial phycocyanin protein | protein | 172 | 76% helix, 0% strand | — |
Ligands and binding sites
- CYC · Phycocyanobilin · ligand · 3 copies · chains A, B
- PO4 · Phosphate ion · ion · chains B
- NO3 · Nitrate ion · ion · chains B
- PG4 · Tetraethylene glycol · additive · 5 copies · chains A, B
- PEG · Di(hydroxyethyl)ether · additive · 2 copies · chains A, B
- PGE · Triethylene glycol · additive · 2 copies · chains B
- MPD · (4S)-2-methyl-2,4-pentanediol · additive · chains B
Binding sites are the residues within 4.5 Å of a ligand's heavy atoms.
Pockets
2 pockets found on a 1 Å grid, 2 with a druggability of 0.5 or more.
| Volume (ų) | Druggability | Buriedness | Lining residues | Inside | |
|---|---|---|---|---|---|
| 1 | 95 | 0.61 | 0.88 | 21 | CYC |
| 2 | 178 | 0.55 | 0.80 | 28 | CYC |
Interfaces
1 interface between chains.
- A–B · 1652 Ų buried · 14 hydrogen bonds · protein-protein
Modifications
Observed in the structure: 3 cofactor, 1 modified (phycocyanobilin attachment, nonstandard).
Compared structures
- 6HRN · C-Phycocyanin from heterocyst forming filamentous cyanobacterium Nostoc sp. WR13 · the same entry in another collection · chain A against A, TM-score 1.00
Analyse
- Open in the research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides and crosslinks on the 3D structure
- Elsewhere: RCSB PDB 6HRN · PDBe 6HRN
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