6xwd

X-ray diffraction
1.6Å resolution

14-3-3 sigma bound to canonical mono-phosphorylated aminopeptidase N (APN, CD13) binding motif

Released:
Source organism: Homo sapiens

Function and Biology Details

Reaction catalysed:
Release of an N-terminal amino acid, Xaa-|-Yaa- from a peptide, amide or arylamide. Xaa is preferably Ala, but may be most amino acids including Pro (slow action). When a terminal hydrophobic residue is followed by a prolyl residue, the two may be released as an intact Xaa-Pro dipeptide.
Biochemical function:
Cellular component:

Structure analysis Details

Assembly composition:
hetero tetramer (preferred)
PDBe Complex ID:
PDB-CPX-147237 (preferred)
Entry contents:
2 distinct polypeptide molecules
Macromolecules (2 distinct):
14-3-3 protein sigma Chain: A
Molecule details ›
Chain: A
Length: 236 amino acids
Theoretical weight: 26.54 KDa
Source organism: Homo sapiens
Expression system: Escherichia coli
UniProt:
  • Canonical: P31947 (Residues: 1-231; Coverage: 93%)
Gene names: HME1, SFN
Sequence domains: 14-3-3 protein
Aminopeptidase N Chain: P
Molecule details ›
Chain: P
Length: 9 amino acids
Theoretical weight: 1.01 KDa
Source organism: Homo sapiens
Expression system: Not provided
UniProt:
  • Canonical: P15144 (Residues: 38-46; Coverage: 1%)
Gene names: ANPEP, APN, CD13, PEPN

Ligands and Environments

3 bound ligands:
1 modified residue:

Experiments and Validation Details

Entry percentile scores
X-ray source: DIAMOND BEAMLINE I04
Spacegroup: C2221
Unit cell:
a: 82Å b: 111.6Å c: 62.4Å
α: 90° β: 90° γ: 90°
R-values:
R R work R free
0.168 0.166 0.196
Expression systems:
  • Escherichia coli
  • Not provided