6H7U

Crystal structure of a POT family transporter in complex with 5-aminolevulinic acid

6H7U の概要

• エントリーDOI: 10.2210/pdb6h7u/pdb
• 関連するPDBエントリー: 6GZ9
• 分子名称: Peptide ABC transporter permease, 5-azanyl-4-oxidanylidene-pentanoic acid (3 entities in total)
• 機能のキーワード: pot family transporter; major facilitator superfamily; peptide complex, membrane protein
• 由来する生物種: Staphylococcus hominis
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 54011.10

構造登録者

Minhas, G.S.,Newstead, S. (登録日: 2018-07-31, 公開日: 2018-12-26, 最終更新日: 2024-01-17)

主引用文献

Minhas, G.S.,Newstead, S.
Structural basis for prodrug recognition by the SLC15 family of proton-coupled peptide transporters.
Proc. Natl. Acad. Sci. U.S.A., 116:804-809, 2019

PubMed Abstract: A major challenge in drug development is the optimization of intestinal absorption and cellular uptake. A successful strategy has been to develop prodrug molecules, which hijack solute carrier (SLC) transporters for active transport into the body. The proton-coupled oligopeptide transporters, PepT1 and PepT2, have been successfully targeted using this approach. Peptide transporters display a remarkable capacity to recognize a diverse library of di- and tripeptides, making them extremely promiscuous and major contributors to the pharmacokinetic profile of several important drug classes, including beta-lactam antibiotics and antiviral and antineoplastic agents. Of particular interest has been their ability to recognize amino acid and peptide-based prodrug molecules, thereby providing a rational approach to improving drug transport into the body. However, the structural basis for prodrug recognition has remained elusive. Here we present crystal structures of a prokaryotic homolog of the mammalian transporters in complex with the antiviral prodrug valacyclovir and the peptide-based photodynamic therapy agent, 5-aminolevulinic acid. The valacyclovir structure reveals that prodrug recognition is mediated through both the amino acid scaffold and the ester bond, which is commonly used to link drug molecules to the carrier's physiological ligand, whereas 5-aminolevulinic acid makes far fewer interactions compared with physiological peptides. These structures provide a unique insight into how peptide transporters interact with xenobiotic molecules and provide a template for further prodrug development.

PubMed: 30602453
DOI: 10.1073/pnas.1813715116

実験手法

X-RAY DIFFRACTION (2.8 Å)