Cited by 738Chemokine receptors and signalingReceptor Mechanisms and SignalingHIV/AIDS drug development and treatment

Solution structure and basis for functional activity of stromal cell‐derived factor‐1; dissociation of CXCR4 activation from binding and inhibition of HIV‐1

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Crump, Matthew P., Gong, Jiang‐Hong, Loetscher, Pius, Rajarathnam, Krishna, Amara, Ali, Arenzana‐Seisdedos, Fernando, Virelizier, Jean‐Louis, Baggiolini, Marco +2 more·1997·The EMBO Journal

Abstract

The three-dimensional structure of stromal cell-derived factor-1 (SDF-1) was determined by NMR spectroscopy. SDF-1 is a monomer with a disordered N-terminal region (residues 1-8), and differs from other chemokines in the packing of the hydrophobic core and surface charge distribution. Results with analogs showed that the N-terminal eight residues formed an important receptor binding site; however, only Lys-1 and Pro-2 were directly involved in receptor activation. Modification to Lys-1 and/or Pro-2 resulted in loss of activity, but generated potent SDF-1 antagonists. Residues 12-17 of the loop region, which we term the RFFESH motif, unlike the N-terminal region, were well defined in the SDF-1 structure. The RFFESH formed a receptor binding site, which we propose to be an important initial docking site of SDF-1 with its receptor. The ability of the SDF-1 analogs to block HIV-1 entry via CXCR4, which is a HIV-1 coreceptor for the virus in addition to being the receptor for SDF-1, correlated with their affinity for CXCR4. Activation of the receptor is not required for HIV-1 inhibition.

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  • The CCL11 protein product resulting from differential signal peptide cleavage is predicted to retain additional amino-acid residues at its N terminus, a key region specifying binding and activity of chemokines.

    “The protein product of CCL11 resulting from differential signal peptide cleavage is predicted to retain additional amino-acid residues at its N terminus, a key region specifying binding and activity of chemokines.44”

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Authors
Crump, M. P., Gong, J., Loetscher, P., Rajarathnam, K., Amara, A., Arenzana‐Seisdedos, F., Virelizier, J., Baggiolini, M., Sykes, B. D., & Clark‐Lewis, I.
Affiliations
  • University of Alberta (CA)
  • University of British Columbia (CA)
  • University of Bern (CH)
  • Institut Pasteur (FR)
Corresponding author
  • Sykes, Brian D.
  • Clark‐Lewis, Ian
Venue
The EMBO Journal
Published
1997-12-01
Volume
16
Issue
23
Pages
6996-7007
ISSN
  • 0261-4189 (ISSN-L)
  • 1460-2075
OpenAlex
W1964083898
Cited by
731
References
45
Citations by year
2026: 10 · 2025: 12 · 2024: 19 · 2023: 14 · 2022: 17 · 2021: 15 · 2020: 29 · 2019: 32 · 2018: 20 · 2017: 35 · 2016: 26 · 2015: 34 · 2014: 30 · 2013: 44 · 2012: 35
FWCI
10.34
Type
journal article
Language
en
Open access
Locations
  • The EMBO Journal (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Medical Research Council Canada
  • Medical Research Council
Topics
  • Health Sciences › Medicine › Oncology › Chemokine receptors and signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Receptor Mechanisms and Signaling
  • Health Sciences › Medicine › Infectious Diseases › HIV/AIDS drug development and treatment
Keywords
CXCL12, chemokine structure, N-terminal disordered region, receptor binding sites, CXCR4, HIV-1 coreceptor, HIV-1 entry inhibition, receptor activation, chemokine antagonists
MeSH terms
Amino Acid Sequence, Binding Sites, Models, Biological, Models, Molecular, Molecular Sequence Data, Protein Binding, Protein Conformation, Structure-Activity Relationship, Virus Replication, HIV-1, Sequence Homology, Amino Acid, Chemokines, Anti-HIV Agents, Receptors, CXCR4, Chemokines, CXC, Nuclear Magnetic Resonance, Biomolecular, Chemokine CXCL12

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