O-GlcNAcylation of High Mobility Group Box 1 (HMGB1) Alters Its DNA Binding and DNA Damage Processing Activities.
O-GlcNAcylation of High Mobility Group Box 1 (HMGB1) Alters Its DNA Binding and DNA Damage Processing Activities.
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高迁移率基团框1(HMGB1)的O-GlcN酰化改变其DNA结合和DNA损伤处理活性。
DOI:
10.1021/jacs.1c06192
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发表时间:
2021-10-06
影响因子:
15
通讯作者:
Pratt MR
中科院分区:
文献类型:
--
作者:
Balana AT;Mukherjee A;Nagpal H;Moon SP;Fierz B;Vasquez KM;Pratt MR
Protein O-GlcNAcylation is an essential and dynamic regulator of myriad cellular processes, including DNA replication and repair. Proteomic studies have identified the multifunctional nuclear protein HMGB1 as O-GlcNAcylated, providing a potential link between this modification and DNA damage responses. Here, we verify the protein’s endogenous modification at S100 and S107 and found that the major modification site is S100, a residue that can potentially influence HMGB1-DNA interactions. Using synthetic protein chemistry, we generated site-specifically O-GlcNAc-modified HMGB1 at S100 and characterized biochemically the effect of the sugar modification on its DNA binding activity. We found that O-GlcNAc alters HMGB1 binding to linear, nucleosomal, supercoiled, cruciform, and interstrand cross-linked damaged DNA, generally resulting in enhanced oligomerization on these DNA structures. Using cell-free extracts, we also found that O-GlcNAc reduces the ability of HMGB1 to facilitate DNA repair, resulting in error-prone processing of damaged DNA. Our results expand our understanding of the molecular consequences of O-GlcNAc and how it affects protein–DNA interfaces. Importantly, our work may also support a link between upregulated O-GlcNAc levels and increased rates of mutations in certain cancer states.
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影响因子:
24.1
作者:
通讯作者:
--
DOI:
10.1083/jcb.201501101
发表时间:
2015-03-30
期刊:
The Journal of cell biology
影响因子:
--
作者:
Bond MR;Hanover JA
通讯作者:
Hanover JA
影响因子:
2.9
作者:
Knapp, S;Müller, S;Musco, G
通讯作者:
Musco, G
影响因子:
2.9
作者:
Jung, YW;Lippard, SJ
通讯作者:
Lippard, SJ
影响因子:
16.6
作者:
Hart GW;Slawson C;Ramirez-Correa G;Lagerlof O
通讯作者:
Lagerlof O