First time at Proteopedia? Click on the green links: they change the 3D image. Click and drag the molecules. Proteopedia is a 3D, interactive encyclopedia of proteins, RNA, DNA and other molecules. With a free user account, you can edit pages in Proteopedia. Visit the Main Page to learn more.

1yah

From Proteopedia

Jump to: navigation, search


1yah, resolution 3.00Å ()
Ligands: , , ,
Activity: Carboxylesterase, with EC number 3.1.1.1
Related: 1mx1, 1mx5, 1mx9, 1ya4, 1ya8, 1yaj
Resources: FirstGlance, OCA, RCSB, PDBsum
Coordinates: save as pdb, mmCIF, xml



Crystal Structure of Human Liver Carboxylesterase complexed to Etyl Acetate; A Fatty Acid Ethyl Ester Analogue

Publication Abstract from PubMed

Human carboxylesterase 1 (hCE1) exhibits broad substrate specificity and is involved in xenobiotic processing and endobiotic metabolism. We present and analyze crystal structures of hCE1 in complexes with the cholesterol-lowering drug mevastatin, the breast cancer drug tamoxifen, the fatty acyl ethyl ester (FAEE) analogue ethyl acetate, and the novel hCE1 inhibitor benzil. We find that mevastatin does not appear to be a substrate for hCE1, and instead acts as a partially non-competitive inhibitor of the enzyme. Similarly, we show that tamoxifen is a low micromolar, partially non-competitive inhibitor of hCE1. Further, we describe the structural basis for the inhibition of hCE1 by the nanomolar-affinity dione benzil, which acts by forming both covalent and non-covalent complexes with the enzyme. Our results provide detailed insights into the catalytic and non-catalytic processing of small molecules by hCE1, and suggest that the efficacy of clinical drugs may be modulated by targeted hCE1 inhibitors.

Structural insights into drug processing by human carboxylesterase 1: tamoxifen, mevastatin, and inhibition by benzil., Fleming CD, Bencharit S, Edwards CC, Hyatt JL, Tsurkan L, Bai F, Fraga C, Morton CL, Howard-Williams EL, Potter PM, Redinbo MR, J Mol Biol. 2005 Sep 9;352(1):165-77. PMID:16081098

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

About this Structure

1yah is a 3 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA.

Reference

  • Fleming CD, Bencharit S, Edwards CC, Hyatt JL, Tsurkan L, Bai F, Fraga C, Morton CL, Howard-Williams EL, Potter PM, Redinbo MR. Structural insights into drug processing by human carboxylesterase 1: tamoxifen, mevastatin, and inhibition by benzil. J Mol Biol. 2005 Sep 9;352(1):165-77. PMID:16081098 doi:http://dx.doi.org/10.1016/j.jmb.2005.07.016

Proteopedia Page Contributors and Editors (what is this?)

OCA

Personal tools