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KMID : 0939920160480010322
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대한암학회지
2016 Volume.48 No. 1 p.322 ~ p.333
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Interactome Analysis Reveals that Heterochromatin Protein 1γ (HP1γ) Is Associated with the DNA Damage Response Pathway
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Kim Hong-Tae
Choi Jae-Duk
Kim Byung-Gyu
Kang Ho-Chul
Lee Jong-Soo
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Abstract
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Purpose : Heterochromatin protein 1γ (HP1γ) interacts with chromosomes by binding to lysine 9-methylated histone H3 or DNA/RNA. HP1γ is involved in various biological processes. The purpose of this study is to gain an understanding of how HP1γ functions in these processes by identifying HP1γ-binding proteins using mass spectrometry.
Materials and Methods : We performed affinity purification of HP1γ-binding proteins using G1/S phase or prometaphase HEK293T cell lysates that transiently express mock or FLAG-HP1γ. Coomassie staining was performed for HP1γ-binding complexes, using cell lysates prepared by affinity chromatography FLAG-agarose beads, and the bands were digested and then analyzed using a mass spectrometry.
Results : We identified 99 HP1γ-binding proteins with diverse cellular functions, including spliceosome, regulation of the actin cytoskeleton, tight junction, pathogenic Escherichia coli infection, mammalian target of rapamycin signaling pathway, nucleotide excision repair, DNA replication, homologous recombination, and mismatch repair.
Conclusion : Our results suggested that HP1γ is functionally active in DNA damage response via protein-protein interaction.
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KEYWORD
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HP1γ, Protein interaction, DNA damage response
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