ISDA

Deposition Date 2014-08-16

Release Date 2014-11-05

Last Version Date 2024-03-20

Entry Detail

PDB ID:

4R3M

Keywords:

Chaperone/Chaperone Inhibitor

Title:

Crystal structure of Human Hsp90 with JR9

Biological Source:

Source Organism:

Homo sapiens (Taxon ID: 9606)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.80 Å

R-Value Free:

0.23

R-Value Work:

0.20

R-Value Observed:

0.21

Space Group:

I 2 2 2

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Heat shock protein HSP 90-alpha
Gene (Uniprot):HSP90AA1
Chain IDs:A
Chain Length:209
Number of Molecules:1
Biological Source:Homo sapiens

UniProt ID:P07900 Pfam ID:PF13589 EC:3.6.4.10

Ligand Molecules

JR9

Primary Citation

Multi-substituted 8-aminoimidazo[1,2-a]pyrazines by Groebke-Blackburn-Bienayme reaction and their Hsp90 inhibitory activity.

Ren, J, Yang, M, Liu, H, Cao, D, Chen, D, Li, J, Tang, L, He, J, Chen, Y.L, Geng, M, Xiong, B, Shen, J.Show

Org.Biomol.Chem. 13 1531 1535 (2015)

PMID: 25490978 DOI: 10.1039/c4ob01865f

Abstact

Using a 2,3-diamino pyrazine substrate and yttrium triflate catalyst, various 2-alkyl and aryl substituted 3,8-diaminoimidazo[1,2-a]pyrazines were efficiently prepared through Groebke-Blackburn-Bienaymé MCR. In particular, a novel 2-piperonyl 3,8-diaminoimidazo[1,2-a]pyrazine structure was prepared exclusively with this new method and was found to have moderate Hsp90 inhibitory activity. A crystalline complex with N-terminus ATP domain of Hsp90 and one of the new Hsp90 inhibitors was also obtained to elucidate the origin of activity of 2-piperonyl 3,8-diaminoimidazo[1,2-a]pyrazines.

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