A unique binding mode enables MCM2 to chaperone histones H3-H4 at replication forks
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A unique binding mode enables MCM2 to chaperone histones H3-H4 at replication forks. / Huang, Hongda; Strømme, Caroline B.; Saredi, Giulia; Hödl, Martina; Strandsby, Anne; González-Aguilera, Cristina; Chen, Shoudeng; Groth, Anja; Patel, Dinshaw J.
In: Nature Structural and Molecular Biology, Vol. 22, No. 8, 2015, p. 618-626.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - A unique binding mode enables MCM2 to chaperone histones H3-H4 at replication forks
AU - Huang, Hongda
AU - Strømme, Caroline B.
AU - Saredi, Giulia
AU - Hödl, Martina
AU - Strandsby, Anne
AU - González-Aguilera, Cristina
AU - Chen, Shoudeng
AU - Groth, Anja
AU - Patel, Dinshaw J
PY - 2015
Y1 - 2015
N2 - During DNA replication, chromatin is reassembled by recycling of modified old histones and deposition of new ones. How histone dynamics integrates with DNA replication to maintain genome and epigenome information remains unclear. Here, we reveal how human MCM2, part of the replicative helicase, chaperones histones H3-H4. Our first structure shows an H3-H4 tetramer bound by two MCM2 histone-binding domains (HBDs), which hijack interaction sites used by nucleosomal DNA. Our second structure reveals MCM2 and ASF1 cochaperoning an H3-H4 dimer. Mutational analyses show that the MCM2 HBD is required for MCM2-7 histone-chaperone function and normal cell proliferation. Further, we show that MCM2 can chaperone both new and old canonical histones H3-H4 as well as H3.3 and CENPA variants. The unique histone-binding mode of MCM2 thus endows the replicative helicase with ideal properties for recycling histones genome wide during DNA replication.
AB - During DNA replication, chromatin is reassembled by recycling of modified old histones and deposition of new ones. How histone dynamics integrates with DNA replication to maintain genome and epigenome information remains unclear. Here, we reveal how human MCM2, part of the replicative helicase, chaperones histones H3-H4. Our first structure shows an H3-H4 tetramer bound by two MCM2 histone-binding domains (HBDs), which hijack interaction sites used by nucleosomal DNA. Our second structure reveals MCM2 and ASF1 cochaperoning an H3-H4 dimer. Mutational analyses show that the MCM2 HBD is required for MCM2-7 histone-chaperone function and normal cell proliferation. Further, we show that MCM2 can chaperone both new and old canonical histones H3-H4 as well as H3.3 and CENPA variants. The unique histone-binding mode of MCM2 thus endows the replicative helicase with ideal properties for recycling histones genome wide during DNA replication.
KW - Amino Acid Sequence
KW - Blotting, Western
KW - Cell Line, Tumor
KW - Chromatin
KW - DNA
KW - DNA Replication
KW - HeLa Cells
KW - Histones
KW - Humans
KW - Minichromosome Maintenance Complex Component 2
KW - Models, Molecular
KW - Molecular Chaperones
KW - Molecular Sequence Data
KW - Mutation
KW - Nucleic Acid Conformation
KW - Protein Binding
KW - Protein Multimerization
KW - Protein Structure, Tertiary
KW - RNA Interference
KW - Sequence Homology, Amino Acid
KW - Journal Article
KW - Research Support, Non-U.S. Gov't
U2 - 10.1038/nsmb.3055
DO - 10.1038/nsmb.3055
M3 - Journal article
C2 - 26167883
VL - 22
SP - 618
EP - 626
JO - Nature Structural and Molecular Biology
JF - Nature Structural and Molecular Biology
SN - 1545-9993
IS - 8
ER -
ID: 165693632