Protocol for evaluating the E3 ligase activity of BRCA1-BARD1 and its variants by nucleosomal histone ubiquitylation.
STAR Protoc
; 5(3): 103294, 2024 Sep 06.
Article
em En
| MEDLINE
| ID: mdl-39243377
ABSTRACT
The tumor suppressor breast cancer 1 (BRCA1) complexed with BRCA1-associated RING domain 1 (BARD1), a RING-type E3 ligase, facilitates the attachment of ubiquitin onto the substrate protein. Here, we present a protocol for evaluating the E3 ligase activity of BRCA1-BARD1 and its variants by nucleosomal histone ubiquitylation. We describe steps for isolating 147 bp Widom 601 DNA and assembling nucleosome core particles (NCPs). We then detail procedures for the in vitro ubiquitylation of nucleosome histone H2A by BRCA1-BARD1 and its variants. For complete details on the use and execution of this protocol, please refer to Wang et al.1.
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MEDLINE
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En
Ano de publicação:
2024
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Article