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Light Harvesting complex phycocyanin PC 630, from the cryptophyte Chroomonas sp. M1627

Analyse Light Harvesting complex phycocyanin PC 630, from the cryptophyte Chroomonas… in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB
7T7U
Type
protein
Length
481 residues
Chains
4
Method
x-ray diffraction
Collection
MolNFT v2 / PDB Bank
Contract
0xd58B01f6C18086e5202cdC5D7Ad3E41790360102
Owner
0xF4e1AA6f26B7DA48EeAD9B24a97927303eeA07b8
Resolution
1.8
Source
Chroomonas sp. M1627
Molecule
Phycoerythrin alpha subunit L1; Phycoerythrin beta subunit; Phycoerythrin alpha subunit S1
UniProt
A0A067XP78, A0A067XP72, A0A067XP68
Ligands
CYC, M1V, AX9
Pockets
9 · best druggability 0.83

Structure

x-ray diffraction · resolution 1.8 · 4 distinct chains · 57% helix, 9% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
APhycoerythrin alpha subunit L1protein8119% helix, 22% strandA0A067XP78
BPhycoerythrin beta subunitprotein16273% helix, 2% strandA0A067XP72
CPhycoerythrin alpha subunit S1protein7023% helix, 26% strandA0A067XP68
DPhycoerythrin beta subunitprotein16874% helix, 2% strandA0A067XP72

Ligands and binding sites

  • CYC · Phycocyanobilin · ligand · 4 copies · chains A, B, C, D
  • M1V · mesobiliverdin IX(alpha) · ligand · 2 copies · chains A, B, C, D
  • AX9 · DiCys-(15,16)-Dihydrobiliverdin · ligand · 2 copies · chains A, B, D, C
  • GOL · Glycerol · additive · chains B, C, D

Binding sites are the residues within 4.5 Å of a ligand's heavy atoms.

Pockets

9 pockets found on a 1 Å grid, 7 with a druggability of 0.5 or more.

PocketVolume (ų)DruggabilityBuriednessLining residuesInside
17150.830.8687AX9, GOL
24810.710.8159M1V
31920.710.8834CYC
41900.710.8835CYC
51600.680.8834CYC

Interfaces

6 interfaces between chains.

  • A–B · 2395 Ų buried · 20 hydrogen bonds · protein-protein
  • C–D · 2034 Ų buried · 17 hydrogen bonds · protein-protein
  • A–C · 833 Ų buried · 12 hydrogen bonds · protein-protein
  • A–D · 691 Ų buried · 8 hydrogen bonds · protein-protein
  • B–C · 297 Ų buried · 9 hydrogen bonds · protein-protein

Modifications

Observed in the structure: 6 covalent, 4 cofactor, 4 modified (covalent ligand, phycocyanobilin attachment, hydroxylation, nonstandard).

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