1ZBD image
Deposition Date 1998-11-06
Release Date 1999-04-02
Last Version Date 2024-10-30
Entry Detail
PDB ID:
1ZBD
Keywords:
G PROTEIN
Title:
STRUCTURAL BASIS OF RAB EFFECTOR SPECIFICITY: CRYSTAL STRUCTURE OF THE SMALL G PROTEIN RAB3A COMPLEXED WITH THE EFFECTOR DOMAIN OF RABPHILIN-3A
Biological Source:
Source Organism:
Rattus norvegicus (Taxon ID: 10116)
Host Organism:
Escherichia coli BL21(DE3)
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.60 Å
R-Value Free:
0.26
R-Value Work:
0.22
R-Value Observed:
0.22
Space Group:
C 1 2 1
1ZBD validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:RABPHILIN-3A
Gene (Uniprot):Rab3a
Mutagens:Q81L
Chain IDs:A
Chain Length:203
Number of Molecules:1
Biological Source:Rattus norvegicus
UniProt ID:P63012 Pfam ID:PF00071
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:RABPHILIN-3A
Gene (Uniprot):Rph3a
Mutagens:C108S
Chain IDs:B
Chain Length:134
Number of Molecules:1
Biological Source:Rattus norvegicus
UniProt ID:P47709 Pfam ID:PF02318
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
MSE A MET SELENOMETHIONINE
Ligand Molecules
GTP
MG
ZN
Primary Citation
Structural basis of Rab effector specificity: crystal structure of the small G protein Rab3A complexed with the effector domain of rabphilin-3A.
Cell(Cambridge,Mass.) 96 363 374 (1999)
PMID: 10025402 DOI: 10.1016/S0092-8674(00)80549-8

Abstact

The small G protein Rab3A plays an important role in the regulation of neurotransmitter release. The crystal structure of activated Rab3A/GTP/Mg2+ bound to the effector domain of rabphilin-3A was solved to 2.6 A resolution. Rabphilin-3A contacts Rab3A in two distinct areas. The first interface involves the Rab3A switch I and switch II regions, which are sensitive to the nucleotide-binding state of Rab3A. The second interface consists of a deep pocket in Rab3A that interacts with a SGAWFF structural element of rabphilin-3A. Sequence and structure analysis, and biochemical data suggest that this pocket, or Rab complementarity-determining region (RabCDR), establishes a specific interaction between each Rab protein and its effectors. RabCDRs could be major determinants of effector specificity during vesicle trafficking and fusion.

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Disease

Primary Citation of related structures
1ZBD