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Crystal structure of riftia pachyptila C1 hemoglobin reveals novel assembly of 24 subunits.

Analyse Crystal structure of riftia pachyptila C1 hemoglobin reveals novel assembly of… in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB
1YHU
Type
protein
Length
3,516 residues
Chains
24
Method
x-ray diffraction
Collection
MolNFT v1 / PDB
Contract
0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
Owner
0x3396CDB397284571d12822B4ae1189a8E22AAAAA
Molecule
Hemoglobin A1 chain; Giant hemoglobins B chain; Hemoglobin B1A chain; Hemoglobin B2 chain
UniProt
Q8IFK4, P80592, Q8IFK2, Q8IFJ9
Ligands
HEM, ZN, OXY
Pockets
20 · best druggability 0.85

Structure

x-ray diffraction · 4 distinct chains · 76% helix, 0% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
A, E, I, M, Q, UHemoglobin A1 chainprotein14577% helix, 0% strandQ8IFK4
B, F, J, N, R, VGiant hemoglobins B chainprotein14476% helix, 0% strandP80592
C, G, K, O, S, WHemoglobin B1A chainprotein14876% helix, 0% strandQ8IFK2
D, H, L, P, T, XHemoglobin B2 chainprotein14974% helix, 0% strandQ8IFJ9

Ligands and binding sites

  • HEM · Protoporphyrin IX containing Fe · ligand · 24 copies · chains A, C, B, D, E, G, F, H, I, K, J, L, M, O, N, P, Q, S, R, T, U, W, V, X
  • ZN · Zinc ion · metal · 12 copies · chains B, J, F, N, V, R
  • OXY · Oxygen molecule · ion · 24 copies · chains A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X

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

Pockets

20 pockets found on a 1 Å grid, 20 with a druggability of 0.5 or more.

PocketVolume (ų)DruggabilityBuriednessLining residuesInside
19650.850.86100HEM, OXY
211600.850.86122HEM, OXY
311260.850.86118HEM, OXY
49780.840.8570HEM, OXY
59480.840.8579HEM, OXY

Interfaces

51 interfaces between chains.

  • B–D · 1105 Ų buried · 9 hydrogen bonds · protein-protein
  • N–P · 1098 Ų buried · 9 hydrogen bonds · protein-protein
  • R–T · 1098 Ų buried · 8 hydrogen bonds · protein-protein
  • V–X · 1098 Ų buried · 8 hydrogen bonds · protein-protein
  • J–L · 1097 Ų buried · 9 hydrogen bonds · protein-protein

Modifications

Observed in the structure: 24 disulfide (disulfide).

Compared structures

  • 1YHU · Crystal structure of Riftia pachyptila C1 hemoglobin reveals novel assembly of 24… · the same entry in another collection · chain J against J, TM-score 1.00

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