1TND image
Deposition Date 1994-03-31
Release Date 1994-07-31
Last Version Date 2024-02-14
Entry Detail
PDB ID:
1TND
Keywords:
BINDING PROTEIN(GTP)
Title:
THE 2.2 ANGSTROMS CRYSTAL STRUCTURE OF TRANSDUCIN-ALPHA COMPLEXED WITH GTP GAMMA S
Biological Source:
Source Organism:
Bos taurus (Taxon ID: 9913)
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.20 Å
R-Value Work:
0.19
R-Value Observed:
0.19
Space Group:
P 1 21 1
1TND validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:TRANSDUCIN
Gene (Uniprot):GNAT1
Chain IDs:A, B, C
Chain Length:324
Number of Molecules:3
Biological Source:Bos taurus
UniProt ID:P04695 Pfam ID:PF00503
Ligand Molecules
CAC
GSP
MG
Primary Citation
The 2.2 A crystal structure of transducin-alpha complexed with GTP gamma S.
Nature 366 654 663 (1993)
PMID: 8259210 DOI: 10.1038/366654a0

Abstact

The 2.2 A crystal structure of activated rod transducin, Gt alpha.GTP gamma S, shows the bound GTP gamma S molecule occluded deep in a cleft between a domain structurally homologous to small GTPases and a helical domain unique to heterotrimeric G proteins. The structure, when combined with biochemical and genetic studies, suggests: how an activated receptor might open this cleft to allow nucleotide exchange; a mechanism for GTP-induced changes in effector and receptor binding surfaces; and a mechanism for GTPase activity not evident from previous data.

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Primary Citation of related structures
1TND