› 4i7c

X-ray diffraction
2.8Å resolution

Siah1 mutant bound to synthetic peptide (ACE)KLRPV(23P)MVRPWVR

Released:
DOI: 10.2210/pdb4i7c/pdb
PDB entry 4i7c coloured by chain, front view.
PDB entry 4i7c coloured by chain, side view.
PDB entry 4i7c coloured by chain, top view.
Source organisms:
Primary publication:
Structure-based design of covalent Siah inhibitors.
Stebbins JL, Santelli E, Feng Y, De SK, Purves A, Motamedchaboki K, Wu B, Ronai ZA, Liddington RC, Pellecchia M
Chem Biol 20 973-82 (2013)
PMID: 23891150

Function and Biology Details

Reaction catalysed: 
S-ubiquitinyl-[E2 ubiquitin-conjugating enzyme]-L-cysteine + [acceptor protein]-L-lysine = [E2 ubiquitin-conjugating enzyme]-L-cysteine + N(6)-ubiquitinyl-[acceptor protein]-L-lysine
Biochemical function:
Biological process:
Cellular component:
Sequence domains:

Structure analysis Details

Assembly composition:
hetero dimer (preferred)
Assembly name:
PDBe Complex ID:
PDB-CPX-173294 (preferred)
Entry contents:
2 distinct polypeptide molecules
Macromolecules (2 distinct):
E3 ubiquitin-protein ligase SIAH1 Chains: A, C
Molecule details ›
Chains: A, C
Length: 196 amino acids
Theoretical weight: 21.98 KDa
Source organism: Homo sapiens
Expression system: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: Q8IUQ4 (Residues: 90-282; Coverage: 68%)
Gene names: HUMSIAH, SIAH1
Sequence domains:
Structure domains:
Protein phyllopod Chains: B, D
Molecule details ›
Chains: B, D
Length: 14 amino acids
Theoretical weight: 1.71 KDa
Source organism: Drosophila melanogaster
Expression system: Not provided
UniProt:
  • Canonical: Q27934 (Residues: 112-125; Coverage: 4%)
Gene names: CG10108, phyl

Ligands and Environments

2 bound ligands:
Ligand ZN 4 x ZN
Ligand MPD 2 x MPD
1 modified residue:
Ligand 23P 2 x 23P

Experiments and Validation Details

Entry percentile scores
X-ray source: SSRL BEAMLINE BL9-2
Spacegroup: I23
Unit cell:
a: 164.23Å b: 164.23Å c: 164.23Å
α: 90° β: 90° γ: 90°
R-values:
R R work R free
0.181 0.178 0.219
Expression systems:
  • Escherichia coli BL21(DE3)
  • Not provided

Quick links

Citations

10 review citations

Tetrazoles via Multicomponent Reactions.
Neochoritis et al. (2019)
9 more

1 mention without citation

Two high-resolution structures of the human E3 ubiquitin ligase Siah1.
Rimsa et al. (2013)