ISDA

Entry Detail

PDB ID:

6BQJ

Keywords:

HYDROLASE

Title:

CRYSTAL STRUCTURE OF HEPATIS C VIRUS PROTEASE (NS3) COMPLEXED WITH TRIPEPTIDIC ACYL SULFONAMIDE INHIBITOR (COMPOUND 16)

Biological Source:

Source Organism:

Hepatitis C virus

Host Organism:

Escherichia coli

PDB Version:

Deposition Date:

2017-11-28

Release Date:

2018-03-21

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.69 Å

R-Value Free:

0.20

R-Value Work:

0.19

R-Value Observed:

0.19

Space Group:

P 1 21 1

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:NS3 protease
Chain IDs:A, B, C
Chain Length:219
Number of Molecules:3
Biological Source:Hepatitis C virus

UniProt ID:P27958 Pfam ID:PF02907 EC:3.4.21.98

Ligand Molecules

ACT

Z1B

Primary Citation

Potent Inhibitors of Hepatitis C Virus NS3 Protease: Employment of a Difluoromethyl Group as a Hydrogen-Bond Donor.

Zheng, B, D'Andrea, S.V, Sun, L.Q, Wang, A.X, Chen, Y, Hrnciar, P, Friborg, J, Falk, P, Hernandez, D, Yu, F, Sheaffer, A.K, Knipe, J.O, Mosure, K, Rajamani, R, Good, A.C, Kish, K, Tredup, J, Klei, H.E, Paruchuri, M, Ng, A, Gao, Q, Rampulla, R.A, Mathur, A, Meanwell, N.A, McPhee, F, Scola, P.M.Show

ACS Med Chem Lett 9 143 148 (2018)

PMID: 29456803 DOI: 10.1021/acsmedchemlett.7b00503

Abstact

The design and synthesis of potent, tripeptidic acylsulfonamide inhibitors of HCV NS3 protease that contain a difluoromethyl cyclopropyl amino acid at P1 are described. A cocrystal structure of 18 with a NS3/4A protease complex suggests the presence of a H-bond between the polarized C-H of the CHF(2) moiety and the backbone carbonyl of Leu135 of the enzyme. Structure-activity relationship studies indicate that this H-bond enhances enzyme inhibitory potency by 13- and 17-fold compared to the CH(3) and CF(3) analogues, respectively, providing insight into the deployment of this unique amino acid.

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Primary Citation of related structures