1IB1 image
Deposition Date 2001-03-26
Release Date 2001-05-02
Last Version Date 2024-11-20
Entry Detail
PDB ID:
1IB1
Keywords:
SIGNALING PROTEIN/TRANSFERASE
Title:
CRYSTAL STRUCTURE OF THE 14-3-3 ZETA:SEROTONIN N-ACETYLTRANSFERASE COMPLEX
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Ovis aries (Taxon ID: 9940)
Host Organism:
Escherichia coli BL21(DE3)
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.70 Å
R-Value Free:
0.22
R-Value Work:
0.20
R-Value Observed:
0.20
Space Group:
P 1
1IB1 validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:14-3-3 ZETA ISOFORM
Gene (Uniprot):YWHAZ
Chain IDs:A, B, C, D
Chain Length:245
Number of Molecules:4
Biological Source:Homo sapiens
UniProt ID:P63104 Pfam ID:PF00244
Protein Blast
Polymer Type:polypeptide(L)
Molecule:SEROTONIN N-ACETYLTRANSFERASE
Gene (Uniprot):AANAT
Chain IDs:E, F, G, H
Chain Length:200
Number of Molecules:4
Biological Source:Ovis aries
UniProt ID:Q29495 Pfam ID:PF00583 EC:2.3.1.87
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
TPO E THR PHOSPHOTHREONINE
Ligand Molecules
COT
Primary Citation
Crystal structure of the 14-3-3zeta:serotonin N-acetyltransferase complex. a role for scaffolding in enzyme regulation.
Cell(Cambridge,Mass.) 105 257 267 (2001)
PMID: 11336675 DOI: 10.1016/S0092-8674(01)00316-6

Abstact

Serotonin N-acetyltransferase (AANAT) controls the daily rhythm in melatonin synthesis. When isolated from tissue, AANAT copurifies with isoforms epsilon and zeta of 14-3-3. We have determined the structure of AANAT bound to 14-3-3zeta, an association that is phosphorylation dependent. AANAT is bound in the central channel of the 14-3-3zeta dimer, and is held in place by extensive interactions both with the amphipathic phosphopeptide binding groove of 14-3-3zeta and with other parts of the central channel. Thermodynamic and activity measurements, together with crystallographic analysis, indicate that binding of AANAT by 14-3-3zeta modulates AANAT's activity and affinity for its substrates by stabilizing a region of AANAT involved in substrate binding.

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Disease

Primary Citation of related structures
1IB1