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Cryo-EM structure of human MLL3-ubncp complex (4.0 ångström)

Analyse Cryo-EM structure of human MLL3-ubncp complex (4.0 ångström) in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB
6KIW
Type
protein + DNA
Length
2,098 residues
Chains
15
Method
electron microscopy
Collection
MolNFT v1 / PDB
Contract
0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
Owner
0x3396CDB397284571d12822B4ae1189a8E22AAAAA
Molecule
Histone H3; Histone H4; Histone H2A; Histone H2B 1.1; DNA (144-mer); DNA (145-mer)…
EC
2.1.1.43
UniProt
A0A310TTQ1, P62799, Q6AZJ8, P02281, Q8NEZ4, Q15291, P62979, P61964, Q9UBL3
Ligands
ZN
Pockets
20 · best druggability 0.82

Structure

electron microscopy · 14 distinct chains · 26% helix, 18% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
A, EHistone H3protein9766% helix, 4% strandA0A310TTQ1
BHistone H4protein8260% helix, 9% strandP62799
CHistone H2Aprotein10749% helix, 4% strandQ6AZJ8
DHistone H2B 1.1protein9274% helix, 2% strandP02281
FHistone H4protein8162% helix, 6% strandP62799
GHistone H2Aprotein10455% helix, 6% strandQ6AZJ8
HHistone H2B 1.1protein9473% helix, 3% strandP02281
IDNA (144-mer)dna144——
JDNA (145-mer)dna145——
KHistone-lysine N-methyltransferase 2C (EC 2.1.1.43)protein15613% helix, 16% strandQ8NEZ4
NRetinoblastoma-binding protein 5protein3472% helix, 32% strandQ15291
OUbiquitinprotein7614% helix, 12% strandP62979
RWd repeat-containing protein 5protein3000% helix, 27% strandP61964
TSET1/ASH2 histone methyltransferase complex subunit ASH2protein1762% helix, 31% strandQ9UBL3

Ligands and binding sites

  • ZN · Zinc ion · metal · chains K

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
19100.820.8463empty
211230.800.8192empty
34690.770.8562empty
45150.770.8450empty
56000.750.8247empty

Interfaces

53 interfaces between chains.

  • I–J · 6551 Ų buried · 525 hydrogen bonds · nucleic-nucleic
  • E–F · 2612 Ų buried · 15 hydrogen bonds · protein-protein
  • A–B · 2607 Ų buried · 17 hydrogen bonds · protein-protein
  • C–D · 2587 Ų buried · 12 hydrogen bonds · protein-protein
  • G–H · 2586 Ų buried · 11 hydrogen bonds · protein-protein

Compared structures

  • 6KIW · Cryo-EM structure of human MLL3-ubNCP complex (4.0 angstrom) · the same entry in another collection · chain T against T, TM-score 1.00

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