1QQE image
Deposition Date 1999-06-04
Release Date 1999-09-08
Last Version Date 2024-02-14
Entry Detail
PDB ID:
1QQE
Keywords:
PROTEIN TRANSPORT
Title:
CRYSTAL STRUCTURE OF THE VESICULAR TRANSPORT PROTEIN SEC17
Biological Source:
Source Organism:
Saccharomyces cerevisiae (Taxon ID: 4932)
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.90 Å
R-Value Free:
0.28
R-Value Work:
0.26
R-Value Observed:
0.26
Space Group:
P 41
1QQE validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:VESICULAR TRANSPORT PROTEIN SEC17
Gene (Uniprot):SEC17
Mutations:M1I
Chain IDs:A
Chain Length:292
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae
UniProt ID:P32602 Pfam ID:PF14938
Primary Citation
Crystal structure of the vesicular transport protein Sec17: implications for SNAP function in SNARE complex disassembly.
Mol.Cell 4 85 95 (1999)
PMID: 10445030 DOI: 10.1016/S1097-2765(00)80190-2

Abstact

SNAP proteins play an essential role in membrane trafficking in eukaryotic cells. They activate and recycle SNARE proteins by serving as adaptors between SNAREs and the cytosolic chaperone NSF. We have determined the crystal structure of Sec17, the yeast homolog of alpha-SNAP, to 2.9 A resolution. Sec17 is composed of an N-terminal twisted sheet of alpha-helical hairpins and a C-terminal alpha-helical bundle. The N-terminal sheet has local similarity to the tetratricopeptide repeats from protein phosphatase 5 but has a different overall twist. Sec17 also shares structural features with HEAT and clathrin heavy chain repeats. Possible models of SNAP:SNARE binding suggest that SNAPs may function as lever arms, transmitting forces generated by conformational changes in NSF/Sec18 to drive disassembly of SNARE complexes.

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Primary Citation of related structures
1QQE