ISDA

Deposition Date 2016-07-01

Release Date 2016-09-07

Last Version Date 2024-10-23

Entry Detail

PDB ID:

5LFH

Keywords:

CYTOKINE

Title:

NMR structure of peptide 10 targeting CXCR4

Biological Source:

Source Organism:

Homo sapiens (Taxon ID: 9606)

Method Details:

Experimental Method:

SOLUTION NMR

Conformers Calculated:

100

Conformers Submitted:

Selection Criteria:

structures with the lowest energy

Download Validation Report

Macromolecular Entities

Polymer Type:polypeptide(L)
Molecule:ACE-ARG-ALA-DCY-ARG-PHE-PHE-CYS
Chain IDs:A
Chain Length:8
Number of Molecules:1
Biological Source:Homo sapiens

Ligand Molecules

Primary Citation

Exploring the N-Terminal Region of C-X-C Motif Chemokine 12 (CXCL12): Identification of Plasma-Stable Cyclic Peptides As Novel, Potent C-X-C Chemokine Receptor Type 4 (CXCR4) Antagonists.

Di Maro, S, Trotta, A.M, Brancaccio, D, Di Leva, F.S, La Pietra, V, Ierano, C, Napolitano, M, Portella, L, D'Alterio, C, Siciliano, R.A, Sementa, D, Tomassi, S, Carotenuto, A, Novellino, E, Scala, S, Marinelli, L.Show

J.Med.Chem. 59 8369 8380 (2016)

PMID: 27571038 DOI: 10.1021/acs.jmedchem.6b00695

Abstact

We previously reported the discovery of a CXCL12-mimetic cyclic peptide (2) as a selective CXCR4 antagonist showing promising in vitro and in vivo anticancer activity. However, further development of this peptide was hampered by its degradation in biological fluids as well as by its low micromolar affinity for the receptor. Herein, extensive chemical modifications led to the development of a new analogue (10) with enhanced potency, specificity, and plasma stability. A combined approach of Ala-amino acid scan, NMR, and molecular modeling unraveled the reasons behind the improved binding properties of 10 vs 2. Biological investigations on leukemia (CEM) and colon (HT29 and HCT116) cancer cell lines showed that 10 is able to impair CXCL12-mediated cell migration, ERK-phosphorylation, and CXCR4 internalization. These outcomes might pave the way for the future preclinical development of 10 in CXCR4 overexpressing leukemia and colon cancer.

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Primary Citation of related structures