ISDA

Deposition Date 2000-08-02

Release Date 2000-08-23

Last Version Date 2024-10-09

Entry Detail

PDB ID:

1FHX

Keywords:

SIGNALING PROTEIN

Title:

Structure of the pleckstrin homology domain from GRP1 in complex with inositol 1,3,4,5-tetrakisphosphate

Biological Source:

Source Organism:

Mus musculus (Taxon ID: 10090)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.50 Å

R-Value Free:

0.28

R-Value Work:

0.22

R-Value Observed:

0.22

Space Group:

P 21 21 21

Download Validation Report

Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:GUANINE NUCLEOTIDE EXCHANGE FACTOR AND INTEGRIN BINDING PROTEIN HOMOLOG GRP1
Gene (Uniprot):Cyth3
Chain IDs:A, B
Chain Length:129
Number of Molecules:2
Biological Source:Mus musculus

UniProt ID:O08967 Pfam ID:PF00169

Modified Residue

Compound ID	Chain ID	Parent Comp ID	Details	2D Image
MSE	A	MET	SELENOMETHIONINE

Ligand Molecules

4IP

SO4

Primary Citation

Structural basis for discrimination of 3-phosphoinositides by pleckstrin homology domains

Ferguson, K.M, Kavran, J.M, Sankaran, V.G, Fournier, E, Isakoff, S.J, Skolnik, E.Y, Lemmon, M.A.Show

Mol.Cell 6 373 384 (2000)

PMID: 10983984 DOI: 10.1016/S1097-2765(00)00037-X

Abstact

Pleckstrin homology (PH) domains are protein modules of around 120 amino acids found in many proteins involved in cellular signaling. Certain PH domains drive signal-dependent membrane recruitment of their host proteins by binding strongly and specifically to lipid second messengers produced by agonist-stimulated phosphoinositide 3-kinases (PI 3-Ks). We describe X-ray crystal structures of two different PH domains bound to Ins(1,3,4,5)P4, the head group of the major PI 3-K product PtdIns(3,4,5)P3. One of these PH domains (from Grp1) is PtdIns(3,4,5)P3 specific, while the other (from DAPP1/PHISH) binds strongly to both PtdIns(3,4,5)P3 and its 5'-dephosphorylation product, PtdIns(3,4)P2. Comparison of the two structures provides an explanation for the distinct phosphoinositide specificities of the two PH domains and allows us to predict the 3-phosphoinositide selectivity of uncharacterized PH domains.

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Primary Citation of related structures