X-ray crystallographic studies of RoAb13 bound to PIYDIN, a part of the N-terminal domain of C-C chemokine receptor 5

Govada, Lata and Saridakis, Emmanuel and Kassen, Sean C. and Bin-Ramzi, Ahmad and Morgan, Rhodri M. and Chain, Benjamin and Helliwell, John R. and Chayen, Naomi E. (2021) X-ray crystallographic studies of RoAb13 bound to PIYDIN, a part of the N-terminal domain of C-C chemokine receptor 5. IUCrJ, 8 (4). pp. 678-683. ISSN 2052-2525

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Official URL: https://doi.org/10.1107/S2052252521005340

Abstract

C-C chemokine receptor 5 (CCR5) is a major co-receptor molecule used by HIV-1 to enter cells. This led to the hypothesis that stimulating an antibody response would block HIV with minimal toxicity. Here, X-ray crystallographic studies of the anti-CCR5 antibody RoAb13 together with two peptides were undertaken: one peptide is a 31-residue peptide containing the PIYDIN sequence and the other is the PIDYIN peptide alone, where PIYDIN is part of the N-terminal region of CCR5 previously shown to be important for HIV entry. In the presence of the longer peptide (the complete N-terminal domain), difference electron density was observed at a site within a hypervariable CDR3 binding region. In the presence of the shorter core peptide PIYDIN, difference electron density is again observed at this CDR3 site, confirming consistent binding for both peptides. This may be useful in the design of a new biomimetic to stimulate an antibody response to CCR5 in order to block HIV infection.

Item Type: Journal Article
Keywords: CCR5 receptor, RoAb13, HIV entry, PIYDIN, antibodies, structure determination, viruses, X-ray crystallography, structural biology
Faculty: Faculty of Science & Engineering
Depositing User: Lisa Blanshard
Date Deposited: 06 Jul 2021 13:54
Last Modified: 09 Sep 2021 18:50
URI: https://arro.anglia.ac.uk/id/eprint/706710

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