: / DNA primase AEP / ribonucleotide binding / DNA replication initiation / Telomere C-strand synthesis initiation / DNA/RNA hybrid binding / Inhibition of replication initiation of damaged DNA by RB1/E2F1 / regulation of type I interferon production / alpha DNA polymerase:primase complex / : ...: / DNA primase AEP / ribonucleotide binding / DNA replication initiation / Telomere C-strand synthesis initiation / DNA/RNA hybrid binding / Inhibition of replication initiation of damaged DNA by RB1/E2F1 / regulation of type I interferon production / alpha DNA polymerase:primase complex / : / Polymerase switching / Processive synthesis on the lagging strand / DNA replication, synthesis of primer / lagging strand elongation / Removal of the Flap Intermediate / Polymerase switching on the C-strand of the telomere / mitotic DNA replication initiation / DNA synthesis involved in DNA repair / DNA strand elongation involved in DNA replication / leading strand elongation / G1/S-Specific Transcription / DNA replication origin binding / Activation of the pre-replicative complex / DNA replication initiation / Defective pyroptosis / double-strand break repair via nonhomologous end joining / nuclear matrix / protein import into nucleus / nuclear envelope / single-stranded DNA binding / 4 iron, 4 sulfur cluster binding / DNA-directed DNA polymerase / DNA-directed DNA polymerase activity / DNA replication / ciliary basal body / DNA repair / nucleotide binding / intracellular membrane-bounded organelle / chromatin binding / protein kinase binding / chromatin / nucleolus / magnesium ion binding / DNA binding / zinc ion binding / nucleoplasm / metal ion binding / nucleus / membrane / cytosol 類似検索 - 分子機能
DNA polymerase alpha, subunit B, N-terminal domain superfamily / : / DNA polymerase alpha subunit B, OB domain / DNA polymerase alpha subunit B N-terminal / DNA polymerase alpha, subunit B, N-terminal / DNA polymerase alpha, subunit B / DNA primase, small subunit, eukaryotic/archaeal / DNA primase, large subunit, eukaryotic / DNA primase, small subunit / DNA primase small subunit ...DNA polymerase alpha, subunit B, N-terminal domain superfamily / : / DNA polymerase alpha subunit B, OB domain / DNA polymerase alpha subunit B N-terminal / DNA polymerase alpha, subunit B, N-terminal / DNA polymerase alpha, subunit B / DNA primase, small subunit, eukaryotic/archaeal / DNA primase, large subunit, eukaryotic / DNA primase, small subunit / DNA primase small subunit / DNA primase large subunit, eukaryotic/archaeal / DNA polymerase alpha catalytic subunit, N-terminal domain / DNA polymerase alpha, zinc finger domain superfamily / Eukaryotic and archaeal DNA primase, large subunit / DNA Polymerase alpha zinc finger / DNA polymerase alpha subunit p180 N terminal / Zinc finger, DNA-directed DNA polymerase, family B, alpha / DNA polymerase alpha catalytic subunit, catalytic domain / DNA polymerase alpha/delta/epsilon, subunit B / DNA polymerase alpha/epsilon subunit B / DNA polymerase family B, thumb domain / DNA polymerase family B signature. / DNA-directed DNA polymerase, family B, multifunctional domain / DNA-directed DNA polymerase, family B, conserved site / DNA polymerase family B / DNA polymerase family B, exonuclease domain / DNA-directed DNA polymerase, family B, exonuclease domain / DNA polymerase, palm domain superfamily / DNA polymerase type-B family / DNA-directed DNA polymerase, family B / Ribonuclease H superfamily / Ribonuclease H-like superfamily / DNA/RNA polymerase superfamily 類似検索 - ドメイン・相同性
DNA polymerase alpha catalytic subunit / DNA primase small subunit / DNA primase large subunit / DNA polymerase alpha subunit B 類似検索 - 構成要素
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
T32 GM130550
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R00GM131023
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
DP2GM150023
米国
引用
ジャーナル: Nat Commun / 年: 2024 タイトル: Small LEA proteins mitigate air-water interface damage to fragile cryo-EM samples during plunge freezing. 著者: Kaitlyn M Abe / Gan Li / Qixiang He / Timothy Grant / Ci Ji Lim / 要旨: Air-water interface (AWI) interactions during cryo-electron microscopy (cryo-EM) sample preparation cause significant sample loss, hindering structural biology research. Organisms like nematodes and ...Air-water interface (AWI) interactions during cryo-electron microscopy (cryo-EM) sample preparation cause significant sample loss, hindering structural biology research. Organisms like nematodes and tardigrades produce Late Embryogenesis Abundant (LEA) proteins to withstand desiccation stress. Here we show that these LEA proteins, when used as additives during plunge freezing, effectively mitigate AWI damage to fragile multi-subunit molecular samples. The resulting high-resolution cryo-EM maps are comparable to or better than those obtained using existing AWI damage mitigation methods. Cryogenic electron tomography reveals that particles are localized at specific interfaces, suggesting LEA proteins form a barrier at the AWI. This interaction may explain the observed sample-dependent preferred orientation of particles. LEA proteins offer a simple, cost-effective, and adaptable approach for cryo-EM structural biologists to overcome AWI-related sample damage, potentially revitalizing challenging projects and advancing the field of structural biology.