Show simple item record

dc.contributor.authorDuffy, Caroline M.
dc.contributor.authorHilbert, Brendan J.
dc.contributor.authorKelch, Brian A
dc.date2022-08-11T08:08:56.000
dc.date.accessioned2022-08-23T16:12:56Z
dc.date.available2022-08-23T16:12:56Z
dc.date.issued2016-03-27
dc.date.submitted2017-09-13
dc.identifier.citation<p>J Mol Biol. 2016 Mar 27;428(6):1023-1040. doi: 10.1016/j.jmb.2015.11.029. Epub 2015 Dec 11. <a href="https://doi.org/10.1016/j.jmb.2015.11.029">Link to article on publisher's site</a></p>
dc.identifier.issn0022-2836 (Linking)
dc.identifier.doi10.1016/j.jmb.2015.11.029
dc.identifier.pmid26688547
dc.identifier.urihttp://hdl.handle.net/20.500.14038/33501
dc.description.abstractThe eukaryotic DNA polymerase sliding clamp, proliferating cell nuclear antigen or PCNA, is a ring-shaped protein complex that surrounds DNA to act as a sliding platform for increasing processivity of cellular replicases and for coordinating various cellular pathways with DNA replication. A single point mutation, Ser228Ile, in the human PCNA gene was recently identified to cause a disease whose symptoms resemble those of DNA damage and repair disorders. The mutation lies near the binding site for most PCNA-interacting proteins. However, the structural consequences of the S228I mutation are unknown. Here, we describe the structure of the disease-causing variant, which reveals a large conformational change that dramatically transforms the binding pocket for PCNA client proteins. We show that the mutation markedly alters the binding energetics for some client proteins, while another, p21(CIP1), is only mildly affected. Structures of the disease variant bound to peptides derived from two PCNA partner proteins reveal that the binding pocket can adjust conformation to accommodate some ligands, indicating that the binding site is dynamic and pliable. Our work has implications for the plasticity of the binding site in PCNA and reveals how a disease mutation selectively alters interactions to a promiscuous binding site that is critical for DNA metabolism.
dc.language.isoen_US
dc.relation<p><a href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=pubmed&cmd=Retrieve&list_uids=26688547&dopt=Abstract">Link to Article in PubMed</a></p>
dc.relation.urlhttps://doi.org/10.1016/j.jmb.2015.11.029
dc.subjectDNA repair
dc.subjectDNA replication
dc.subjectX-ray crystallography
dc.subjectribonucleotide excision repair
dc.subjectsliding clamp
dc.subjectMolecular Biology
dc.titleA Disease-Causing Variant in PCNA Disrupts a Promiscuous Protein Binding Site
dc.typeJournal Article
dc.source.journaltitleJournal of molecular biology
dc.source.volume428
dc.source.issue6
dc.identifier.legacycoverpagehttps://escholarship.umassmed.edu/gsbs_sp/2026
dc.identifier.contextkey10740182
html.description.abstract<p>The eukaryotic DNA polymerase sliding clamp, proliferating cell nuclear antigen or PCNA, is a ring-shaped protein complex that surrounds DNA to act as a sliding platform for increasing processivity of cellular replicases and for coordinating various cellular pathways with DNA replication. A single point mutation, Ser228Ile, in the human PCNA gene was recently identified to cause a disease whose symptoms resemble those of DNA damage and repair disorders. The mutation lies near the binding site for most PCNA-interacting proteins. However, the structural consequences of the S228I mutation are unknown. Here, we describe the structure of the disease-causing variant, which reveals a large conformational change that dramatically transforms the binding pocket for PCNA client proteins. We show that the mutation markedly alters the binding energetics for some client proteins, while another, p21(CIP1), is only mildly affected. Structures of the disease variant bound to peptides derived from two PCNA partner proteins reveal that the binding pocket can adjust conformation to accommodate some ligands, indicating that the binding site is dynamic and pliable. Our work has implications for the plasticity of the binding site in PCNA and reveals how a disease mutation selectively alters interactions to a promiscuous binding site that is critical for DNA metabolism.</p>
dc.identifier.submissionpathgsbs_sp/2026
dc.contributor.departmentDepartment of Biochemistry and Molecular Pharmacology
dc.source.pages1023-1040
dc.contributor.studentCaroline M. Duffy


Files in this item

Thumbnail
Name:
Publisher version

This item appears in the following Collection(s)

Show simple item record