Abstract
Replicated mammalian chromosomes condense to segregate during anaphase, and they de-condense at the conclusion of mitosis. Currently, it is not understood what the factors and events are that specify de-condensation. Here, we demonstrate that chromosome de-condensation needs the function of an inner nuclear membrane (INM) protein hsSUN1 and a membrane-associated histone acetyltransferase (HAT), hALP. We propose that nascently reforming nuclear envelope employs hsSUN1 and hALP to acetylate histones for de-compacting DNA at the end of mitosis.
MeSH terms
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Acetylation
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Acetyltransferases / physiology*
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Chromosomes / metabolism*
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HeLa Cells
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Humans
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Membrane Proteins / analysis
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Membrane Proteins / physiology*
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Microtubule-Associated Proteins / analysis
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Microtubule-Associated Proteins / physiology*
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Mitosis*
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N-Terminal Acetyltransferase E
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N-Terminal Acetyltransferases
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Nuclear Envelope / chemistry
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Nuclear Proteins / analysis
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Nuclear Proteins / physiology*
Substances
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Membrane Proteins
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Microtubule-Associated Proteins
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Nuclear Proteins
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SUN1 protein, human
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Acetyltransferases
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N-Terminal Acetyltransferase E
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N-Terminal Acetyltransferases
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NAT10 protein, human