Name: targeted in situ mutagenesis of histone genes in budding yeast
Uploaded: 2017-01-26T15:00:00.000+00:00
Duration: 8 min 48 s
Description: Watch this Scientific Journal Video about Targeted in Situ Mutagenesis of Histone Genes in Budding Yeast at JoVE.com

We thank Reine Protacio for helpful comments during the preparation of this manuscript. We express our gratitude to the National Science Foundation (grants nos. 1243680 and 1613754) and the Hendrix College Odyssey Program for funding support.

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The authors declare that they have no competing financial interests.

一倍体S.セレビシエ細胞における4つのコアヒストンタンパク質のそれぞれのコードは、具体的突然変異誘発のための2つの遺伝子のいずれかをターゲットにする研究者のための挑戦を表すことができる2つの非対立遺伝子間の配列相同性の高レベル。以前は頻繁に依存し、Delitto PERFETTO、サイト固有のゲノム（SSG）突然変異誘発、およびクローニングのないPCRに基づく対立遺伝子交?...

4つのコアヒストンタンパク質H2A、H2B、H3、およびH4は、真核生物の染色体の締固め、組織、および機能において中心的な役割を果たしています。これらのヒストンのそれぞれの二組は、最終的にヌクレオソーム1の形成をもたらす、ヒストン八量体、自身の周囲のDNAの〜147塩基対の折り返しを指示する分子スプールを形成します。ヌクレオソームは、そのような遺伝子転写の調節および染色体全体のユークロマチンとヘテロクロマチンの形成と染色体ベースのプロセスの様々な積極的な参加者であり、そのように、過去数十年にわたって集中的な研究の焦点となっています。これらの機構は、ヒストン残基、ATP依存的ヌクレオソームのリモデリング、およびATP非依存性ヌクレオソーム再編成の翻訳後修飾を含む - の機構の数がヌクレオソームは、特定のプロセスの実行を容易にすることができる方法で操作することができるによって記載されています及び組立/分解2,3。 出芽酵母サッカロマイセス・セレビシエは、真核生物におけるヒストンの機能を理解するために、特に強力なモデル生物です。これは主に遺伝的および生化学的実験の様々なドメイン真核生物および酵母の従順を通して、ヒストンタンパク質の進化的保存の高度に帰することができる4に近づきます。酵母における逆遺伝的アプローチは広くクロマチン生物学のさまざまな側面に関する特定のヒストン変異の影響を研究するために使用されてきました。実験のこれらのタイプのためには、自律的なプラスミドからの発現は、ヒストンタンパク質の異常な細胞内レベルにつながることができますように（これは細胞内でのプラスミドの様々な数に）、変異型ヒストンが母国のゲノム遺伝子座から発現される細胞を使用することが好ましいことが多いとクロマチンアンの同時変更最終的には結果の解釈を混乱することができvironments、。 ここでは、ゲノム中の残りの外因性DNA配列せずに所望の変異（複数可）の生成にクローニングステップと結果を必要としないそれらの天然ゲノム位置でのヒストン遺伝子の標的突然変異誘発を可能にするPCRベースの技術が記載されています。この技術は、酵母内で効率的な相同組換え系を利用し、他のグループによって開発された他の同様の技術と共通のいくつかの機能があります-最も顕著Delitto PERFETTO、サイト固有のゲノム（SSG）突然変異誘発、およびクローニングのないPCRに基づく対立遺伝子を代替法5、6、7。しかし、私たちが説明する手法は、特にヒストン遺伝子の突然変異誘発のために非常に適しせる側面を持っています。半数体酵母細胞では、4つのコアヒストンの各々は、二つの非Aによりコードされますllelicと相同性の高い遺伝子は、たとえば、ヒストンH3はHHT1とHHT2遺伝子によってコードされ、そして2つの遺伝子のオープンリーディングフレーム（ORF）は、シーケンス内の90％以上同一です。相同性のこの高度に特異的突然変異誘発のための2つのヒストンをコードする遺伝子のいずれかを標的とするように設計された実験を複雑にすることができます。上述の方法は、多くの場合、相同組換えを駆動するために、標的遺伝子のORF内の少なくともいくつかの配列の使用を必要とするのに対し、ここで説明する技術は、のために（非常に少ない配列相同性を共有する）ヒストン遺伝子のORFに隣接する配列を利用します組換え工程は、所望の遺伝子座に突然変異誘発の成功した標的化の可能性を高めます。また、再結合を駆動相同領域は、さらに効率的な標的相同組換えに貢献し、非常に広範であることができます。

<table><tbody><tr><td>1 kb DNA Ladder (DNA standards)</td><td>New England BioLabs</td><td>N3232L</td><td></td></tr><tr><td>Agarose&amp;nbsp;</td><td>Sigma</td><td>A5093-100G</td><td></td></tr><tr><td>Boric Acid</td><td>Sigma</td><td>B0394-500G</td><td></td></tr><tr><td>dNTP mix (10 mM each)</td><td>ThermoFisher Scientific</td><td>R0192</td><td></td></tr><tr><td>EDTA solution (0.5 M, pH 8.0)</td><td>AmericanBio</td><td>AB00502-01000</td><td></td></tr><tr><td>Ethanol (200 Proof)</td><td>Fisher Scientific</td><td>16-100-824</td><td></td></tr><tr><td>Ethylenediaminetetraacetic acid disodium salt dihydrate (EDTA)</td><td>Sigma</td><td>E4884-500G</td><td></td></tr><tr><td>Lithium acetate dihydrate</td><td>Sigma</td><td>L6883-250G</td><td></td></tr><tr><td>MyCycler Thermal Cycler</td><td>BioRad</td><td>170-9703</td><td></td></tr><tr><td>Poly(ethylene glycol) (PEG)</td><td>Sigma</td><td>P3640-1KG</td><td></td></tr><tr><td>PrimeSTAR HS DNA Polymerase (high fidelity DNA polymerase)&amp;nbsp; and 5x buffer</td><td>Fisher Scientific</td><td>50-443-960</td><td></td></tr><tr><td>Salmon sperm DNA solution</td><td>ThermoFisher Scientific</td><td>15632-011</td><td></td></tr><tr><td>Sigma 7-9 (Tris base, powder form)</td><td>Sigma</td><td>T1378-1KG</td><td></td></tr><tr><td>Sodium acetate trihydrate</td><td>Sigma</td><td>236500-500G</td><td></td></tr><tr><td>Supra Sieve GPG Agarose (low metling temperature agarose)</td><td>AmericanBio</td><td>AB00985-00100</td><td></td></tr><tr><td>Taq Polymerase and 10x Buffer</td><td>New England BioLabs</td><td>M0273X</td><td></td></tr><tr><td>Toothpicks</td><td>Fisher Scientific</td><td>S67859</td><td></td></tr><tr><td>Tris-HCl (1 M, pH 8.0)</td><td>AmericanBio</td><td>AB14043-01000</td><td></td></tr><tr><td>a-D(+)-Glucose</td><td>Fisher Scientific</td><td>AC170080025</td><td>for yeast media</td></tr><tr><td>Agar</td><td>Fisher Scientific</td><td>DF0140-01-0</td><td>for yeast media</td></tr><tr><td>Peptone</td><td>Fisher Scientific</td><td>DF0118-07-2</td><td>for YPD medium</td></tr><tr><td>Yeast Extract</td><td>Fisher Scientific</td><td>DF0127-17-9</td><td>for YPD medium</td></tr><tr><td>4-aminobenzoic acid</td><td>Sigma</td><td>A9878-100G</td><td>for complete minimal dropout medium&amp;nbsp;</td></tr><tr><td>Adenine</td><td>Sigma</td><td>A8626-100G</td><td>for complete minimal dropout medium&amp;nbsp;</td></tr><tr><td>Glycine hydrochloride</td><td>Sigma</td><td>G2879-100G</td><td>for complete minimal dropout medium&amp;nbsp;</td></tr><tr><td>L-Alanine</td><td>Sigma</td><td>A7627-100G</td><td>for complete minimal dropout medium&amp;nbsp;</td></tr><tr><td>L-Arginine monohydrochloride</td><td>Sigma</td><td>A5131-100G</td><td>for complete minimal dropout medium&amp;nbsp;</td></tr><tr><td>L-Asparagine monohydrate</td><td>Sigma</td><td>A8381-100G</td><td>for complete minimal dropout medium&amp;nbsp;</td></tr><tr><td>L-Aspartic acid sodium salt monohydrate</td><td>Sigma</td><td>A6683-100G</td><td>for complete minimal dropout medium&amp;nbsp;</td></tr><tr><td>L-Cysteine hydrochloride monohydrate</td><td>Sigma</td><td>C7880-100G</td><td>for complete minimal dropout medium&amp;nbsp;</td></tr><tr><td>L-Glutamic acid hydrochloride</td><td>Sigma</td><td>G2128-100G</td><td>for complete minimal dropout medium&amp;nbsp;</td></tr><tr><td>L-Glutamine</td><td>Sigma</td><td>G3126-100G</td><td>for complete minimal dropout medium&amp;nbsp;</td></tr><tr><td>L-Histidine monohydrochloride monohydrate</td><td>Sigma</td><td>H8125-100G</td><td>for complete minimal dropout medium&amp;nbsp;</td></tr><tr><td>L-Isoleucine</td><td>Sigma</td><td>I2752-100G</td><td>for complete minimal dropout medium&amp;nbsp;</td></tr><tr><td>L-Leucine</td><td>Sigma</td><td>L8000-100G</td><td>for complete minimal dropout medium&amp;nbsp;</td></tr><tr><td>L-Lysine monohydrochloride</td><td>Sigma</td><td>L5626-100G</td><td>for complete minimal dropout medium&amp;nbsp;</td></tr><tr><td>L-Methionine</td><td>Sigma</td><td>M9625-100G</td><td>for complete minimal dropout medium&amp;nbsp;</td></tr><tr><td>L-Phenylalanine</td><td>Sigma</td><td>P2126-100G</td><td>for complete minimal dropout medium&amp;nbsp;</td></tr><tr><td>L-Proline</td><td>Sigma</td><td>P0380-100G</td><td>for complete minimal dropout medium&amp;nbsp;</td></tr><tr><td>L-Serine</td><td>Sigma</td><td>S4500-100G</td><td>for complete minimal dropout medium&amp;nbsp;</td></tr><tr><td>L-Threonine</td><td>Sigma</td><td>T8625-100G</td><td>for complete minimal dropout medium&amp;nbsp;</td></tr><tr><td>L-Tryptophan</td><td>Sigma</td><td>T0254-100G</td><td>for complete minimal dropout medium&amp;nbsp;</td></tr><tr><td>L-Tyrosine</td><td>Sigma</td><td>T3754-100G</td><td>for complete minimal dropout medium&amp;nbsp;</td></tr><tr><td>L-Valine</td><td>Sigma</td><td>V0500-100G</td><td>for complete minimal dropout medium&amp;nbsp;</td></tr><tr><td>myo-Inositol</td><td>Sigma</td><td>I5125-100G</td><td>for complete minimal dropout medium&amp;nbsp;</td></tr><tr><td>Uracil</td><td>Sigma</td><td>U0750-100G</td><td>for complete minimal dropout medium&amp;nbsp;</td></tr><tr><td>Ammonium Sulfate</td><td>Fisher Scientific</td><td>A702-500</td><td>for complete minimal dropout medium&amp;nbsp;</td></tr><tr><td>Yeast Nitrogen Base</td><td>Fisher Scientific</td><td>DF0919-07-3</td><td>for complete minimal dropout medium&amp;nbsp;</td></tr><tr><td>5-Fluoroorotic acid (5-FOA)</td><td>AmericanBio</td><td>AB04067-00005</td><td>for&amp;nbsp; 5-FOA medium</td></tr></tbody></table>

targeted in situ mutagenesis of histone genes in budding yeast

We describe a PCR- and homologous recombination-based system for generating targeted mutations in histone genes in budding yeast cells. The resulting mutant alleles reside at their endogenous genomic sites and no exogenous DNA sequences are left in the genome following the procedure. Since in haploid yeast cells each of the four core histone proteins is encoded by two non-allelic genes with highly homologous open reading frames (ORFs), targeting mutagenesis specifically to one of two genes encoding a particular histone protein can be problematic. The strategy we describe here bypasses this problem by utilizing sequences outside, rather than within, the ORF of the target genes for the homologous recombination step. Another feature of this system is that the regions of DNA driving the homologous recombination steps can be made to be very extensive, thus increasing the likelihood of successful integration events. These features make this strategy particularly well-suited for histone gene mutagenesis, but can also be adapted for mutagenesis of other genes in the yeast genome.

私たちは、 その場での突然変異誘発戦略において標的の代表例として、グルタミン酸（H3-R53E変異体）にアルギニンから53位での置換を保有するヒストンH3変異体タンパク質を発現するhht2対立遺伝子の発生を記載しています。 私たちは、HHT2のORF全体がURA3遺伝子（プロトコールのステップ1?...

Watch this Scientific Journal Video about Targeted in Situ Mutagenesis of Histone Genes in Budding Yeast at JoVE.com

出芽酵母におけるヒストン遺伝子の in situ 突然変異誘発を標的とした |遺伝学 |ビデオ

Targeted in Situ Mutagenesis of Histone Genes in Budding Yeast

A strategy for generating mutations in histone genes at their endogenous location in Saccharomyces cerevisiae is presented.

ターゲットを絞りました<em&gt;その場で</em出芽酵母におけるヒストン遺伝子の&gt;突然変異誘発

We describe a PCR- and homologous recombination-based system for generating targeted mutations in histone genes in budding yeast cells. The resulting ...

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Targeted in Situ Mutagenesis of Histone Genes in Budding Yeast

DNA Structure and Function

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15.2K ビュー.  Hendrix College. A strategy for generating mutations in histone genes at their endogenous location in Saccharomyces cerevisiae is presented. 

ビデオ: Targeted in Situ Mutagenesis of Histone Genes in Budding Yeast

Optogenetic Random Mutagenesis Using Histone-miniSOG in C. elegans

Forward genetic screening in model organisms is the workhorse to discover functionally important genes and pathways in many biological processes. In most mutagenesis-based screens, researchers have relied on the use of toxic chemicals, carcinogens, or irradiation, which requires designated equipment, safety setup, and/or disposal of hazardous materials. We have developed a simple approach to induce heritable mutations in C. elegans using germline-expressed histone-miniSOG, a light-inducible potent generator of reactive oxygen species. This mutagenesis method is free of toxic chemicals and requires minimal laboratory safety and waste management. The induced DNA modifications include single-nucleotide changes and small deletions, and complement those caused by classical chemical mutagenesis. This methodology can also be used to induce integration of extrachromosomal transgenes. Here, we provide the details of the LED setup and protocols for standard mutagenesis and transgene integration.

Optogenetic Random Mutagenesis Using Histone-miniSOG in C. elegans

Genetically-encoded histone-miniSOG induces genome-wide heritable mutations in a blue&#160;light-dependent manner. This mutagenesis method is simple, fast, free of toxic chemicals, and well-suited for forward genetic screening and transgene integration.

でヒストンminiSOGを使用した光遺伝学ランダム突然変異誘発<em&gt; C。エレガンス</em

Forward genetic screening in model organisms is the workhorse to discover functionally important genes and pathways in many biological processes. In most ...

遺伝学

Chromatin Immunoprecipitation (ChIP) of Histone Modifications from Saccharomyces cerevisiae

Histone post-translational modifications (PTMs), such as acetylation, methylation and phosphorylation, are dynamically regulated by a series of enzymes that add or remove these marks in response to signals received by the cell. These PTMS are key contributors to the regulation of processes such as gene expression control and DNA repair. Chromatin immunoprecipitation (chIP) has been an instrumental approach for dissecting the abundance and localization of many histone PTMs throughout the genome in response to diverse perturbations to the cell. Here, a versatile method for performing chIP of post-translationally modified histones from the budding yeast Saccharomyces cerevisiae (S. cerevisiae) is described. This method relies on crosslinking of proteins and DNA using formaldehyde treatment of yeast cultures, generation of yeast lysates by bead beating, solubilization of chromatin fragments by micrococcal nuclease, and immunoprecipitation of histone-DNA complexes. DNA associated with the histone mark of interest is purified and subjected to quantitative PCR analysis to evaluate its enrichment at multiple loci throughout the genome. Representative experiments probing the localization of the histone marks H3K4me2 and H4K16ac in wildtype and mutant yeast are discussed to demonstrate data analysis and interpretation. This method is suitable for a variety of histone PTMs and can be performed with different mutant strains or in the presence of diverse environmental stresses, making it an excellent tool for investigating changes in chromatin dynamics under different conditions.

Chromatin Immunoprecipitation ChIP of Histone Modifications from Saccharomyces cerevisiae

Here, we describe a protocol for chromatin immunoprecipitation of modified histones from the budding yeast Saccharomyces cerevisiae. Immunoprecipitated DNA is subsequently used for quantitative PCR to interrogate the abundance and localization of histone post-translational modifications throughout the genome.

酵母からヒストン修飾のクロマチン免疫沈降 (チップ)

Histone post-translational modifications (PTMs), such as acetylation, methylation and phosphorylation, are dynamically regulated by a series of enzymes ...

Gene-targeted Random Mutagenesis to Select Heterochromatin-destabilizing Proteasome Mutants in Fission Yeast

Random mutagenesis of a target gene is commonly used to identify mutations that yield the desired phenotype. Of the methods that may be used to achieve random mutagenesis, error-prone PCR is a convenient and efficient strategy for generating a diverse pool of mutants (i.e., a mutant library). Error-prone PCR is the method of choice when a researcher seeks to mutate a pre-defined region, such as the coding region of a gene while leaving other genomic regions unaffected. After the mutant library is amplified by error-prone PCR, it must be cloned into a suitable plasmid. The size of the library generated by error-prone PCR is constrained by the efficiency of the cloning step. However, in the fission yeast, Schizosaccharomyces pombe, the cloning step can be replaced by the use of a highly efficient one-step fusion PCR to generate constructs for transformation. Mutants of desired phenotypes may then be selected using appropriate reporters. Here, we describe this strategy in detail, taking as an example, a reporter inserted at centromeric heterochromatin.

This article describes a detailed methodology for random mutagenesis of a target gene in fission yeast. As an example, we target rpt4+, which encodes a subunit of the 19S proteasome, and screen for mutations that destabilize heterochromatin.

分裂酵母におけるプロテアソーム変異体のヘテロクロマチン不安定を選択するランダムな変異を遺伝子をターゲットとしました。

Random mutagenesis of a target gene is commonly used to identify mutations that yield the desired phenotype. Of the methods that may be used to achieve ...

Single Molecule Fluorescence In Situ Hybridization (smFISH) Analysis in Budding Yeast Vegetative Growth and Meiosis

Single molecule fluorescence in situ hybridization (smFISH) is a powerful technique to study gene expression in single cells due to its ability to detect and count individual RNA molecules. Complementary to deep sequencing-based methods, smFISH provides information about the cell-to-cell variation in transcript abundance and the subcellular localization of a given RNA. Recently, we have used smFISH to study the expression of the gene&#160;NDC80&#160;during meiosis in budding yeast, in which two transcript isoforms exist and the short transcript isoform has its entire sequence shared with the long isoform. To confidently identify each transcript isoform, we optimized known smFISH protocols and obtained high consistency and quality of smFISH data for the samples acquired during budding yeast meiosis. Here, we describe this optimized protocol, the criteria that we use to determine whether high quality of smFISH data is obtained, and some tips for implementing this protocol in&#160;other yeast strains and growth conditions.

Single Molecule Fluorescence In Situ Hybridization smFISH Analysis in Budding Yeast Vegetative Growth and Meiosis

This single molecule fluorescence in situ hybridization protocol is optimized to quantify the number of RNA molecules in budding yeast during vegetative growth and meiosis.

単一分子蛍光In-situハイブリダイゼーション (smFISH) における出芽酵母の栄養増殖と減数分裂

Single molecule fluorescence in situ hybridization (smFISH) is a powerful technique to study gene expression in single cells due to its ability to detect ...

Characterizing Histone Post-translational Modification Alterations in Yeast Neurodegenerative Proteinopathy Models

Neurodegenerative diseases, such as amyotrophic lateral sclerosis (ALS) and Parkinson&#39;s disease (PD), cause the loss of hundreds of thousands of lives each year. Effective treatment options able to halt disease progression are lacking. Despite the extensive sequencing efforts in large patient populations, the majority of ALS and PD cases remain unexplained by genetic mutations alone. Epigenetics mechanisms, such as the post-translational modification of histone proteins, may be involved in neurodegenerative disease etiology and progression and lead to new targets for pharmaceutical intervention. Mammalian in vivo and in vitro models of ALS and PD are costly and often require prolonged and laborious experimental protocols. Here, we outline a practical, fast, and cost-effective approach to determining genome-wide alterations in histone modification levels using Saccharomyces cerevisiae as a model system. This protocol allows for comprehensive investigations into epigenetic changes connected to neurodegenerative proteinopathies that corroborate previous findings in different model systems while significantly expanding our knowledge of the neurodegenerative disease epigenome.

This protocol outlines experimental procedures to characterize genome-wide changes in the levels of histone post-translational modifications (PTM) occurring in connection with the overexpression of proteins associated with ALS and Parkinson&#39;s disease in Saccharomyces cerevisiae models. After SDS-PAGE separation, individual histone PTM levels are detected with modification-specific antibodies via Western blotting.

酵母神経変性認知症予備モデルにおけるヒストン翻訳後修飾変化の特性

Neurodegenerative diseases, such as amyotrophic lateral sclerosis (ALS) and Parkinson&#39;s disease (PD), cause the loss of hundreds of thousands of lives ...

A Deep-sequencing-assisted, Spontaneous Suppressor Screen in the Fission Yeast Schizosaccharomyces pombe

A genetic screen for mutant alleles that suppress phenotypic defects caused by a mutation is a powerful approach to identify genes that belong to closely related biochemical pathways. Previous methods such as the Synthetic Genetic Array (SGA) analysis, and random mutagenesis techniques using ultraviolet (UV) or chemicals like ethyl methanesulfonate (EMS) or N-ethyl-N- nitrosourea (ENU), have been widely used but are often costly and laborious. Also, these mutagen-based screening methods are frequently associated with severe side effects on the organism, inducing multiple mutations that add to the complexity of isolating the suppressors. Here, we present a simple and effective protocol to identify suppressor mutations in mutants which confer a growth defect in Schizosaccharomyces pombe. The fitness of cells with a growth deficiency in standard rich liquid media or synthetic liquid media can be monitored for recovery using an automated 96-well plate reader over an extended period. Once a cell acquires a suppressor mutation in the culture, its descendants outcompete those of the parental cells. The recovered cells that have a competitive growth advantage over the parental cells can then be isolated and backcrossed with the parental cells. The suppressor mutations are then identified using whole-genome sequencing. Using this approach, we have successfully isolated multiple suppressors that alleviate the severe growth defects caused by loss of Elf1, an AAA+ family ATPase that is important in nuclear mRNA transport and maintenance of genomic stability. There are currently over 400 genes in S. pombe with mutants conferring a growth defect. As many of these genes are uncharacterized, we propose that our method will hasten the identification of novel functional interactions with this user-friendly, high-throughput approach.

A Deep-sequencing-assisted, Spontaneous Suppressor Screen in the Fission Yeast Schizosaccharomyces pombe

We present a simple suppressor screen protocol in fission yeast. This method is efficient, mutagen-free, and&#160; selective&#160; for&#160; mutations that&#160; often&#160; occur at&#160; &#160;a&#160; single&#160; genomic&#160; locus.&#160; The protocol is suitable for isolating suppressors that alleviate growth defects in liquid culture that are caused by a mutation or a drug.

分裂酵母分裂酵母のディープ シーケンス アシスト、自発的な抑制画面

A genetic screen for mutant alleles that suppress phenotypic defects caused by a mutation is a powerful approach to identify genes that belong to closely ...

Genetic Studies of Human DNA Repair Proteins Using Yeast as a Model System 

Understanding the roles of human DNA repair proteins in genetic pathways is a formidable challenge to many researchers. Genetic studies in mammalian systems have been limited due to the lack of readily available tools including defined mutant genetic cell lines, regulatory expression systems, and appropriate selectable markers. To circumvent these difficulties, model genetic systems in lower eukaryotes have become an attractive choice for the study of functionally conserved DNA repair proteins and pathways. We have developed a model yeast system to study the poorly defined genetic functions of the Werner syndrome helicase-nuclease (WRN) in nucleic acid metabolism. Cellular phenotypes associated with defined genetic mutant backgrounds can be investigated to clarify the cellular and molecular functions of WRN through its catalytic activities and protein interactions. The human WRN gene and associated variants, cloned into DNA plasmids for expression in yeast, can be placed under the control of a regulatory plasmid element. The expression construct can then be transformed into the appropriate yeast mutant background, and genetic function assayed by a variety of methodologies. Using this approach, we determined that WRN, like its related RecQ family members BLM and Sgs1, operates in a Top3-dependent pathway that is likely to be important for genomic stability. This is described in our recent publication [1] at <a href="http://www.impactaging.com">www.impactaging.com</a>. Detailed methods of specific assays for genetic complementation studies in yeast are provided in this paper.

Genetic Studies of Human DNA Repair Proteins Using Yeast as a Model System

Genetic studies in yeast can be employed to investigate the molecular and cellular functions of human genes in cellular DNA metabolism. Methods are described for the genetic characterization of the human WRN gene product defective in the premature aging disorder Werner syndrome in functionally conserved pathways using yeast as a tractable model system.

人間のDNA修復タンパク質の遺伝的研究は、モデルシステムとして酵母を使用

Understanding the roles of human DNA repair proteins in genetic pathways is a formidable challenge to many researchers.  Genetic studies in mammalian ...

生物学

酵母細胞からの遺伝子座特異的クロマチン単離

Single-Copy Gene Locus Chromatin Purification in Saccharomyces cerevisiae

The basic organizational unit of eukaryotic chromatin is the nucleosome core particle (NCP), which comprises DNA wrapped ~1.7 times around a histone octamer. Chromatin is defined as the entity of NCPs and numerous other protein complexes, including transcription factors, chromatin remodeling and modifying enzymes. It is still unclear how these protein-DNA interactions are orchestrated at the level of specific genomic loci during different stages of the cell cycle. This is mainly due to the current technical limitations, which make it challenging to obtain precise measurements of such dynamic interactions. Here, we describe an improved method combining site-specific recombination with an efficient single-step affinity purification protocol to isolate a single-copy gene locus of interest in its native chromatin state. The method allows for the robust enrichment of the target locus over genomic chromatin, making this technique an effective strategy for identifying and quantifying protein interactions in an unbiased and systematic manner, for example by mass spectrometry. Further to such compositional analyses, native chromatin purified by this method likely reflects the in vivo situation regarding nucleosome positioning and histone modifications and is, therefore, amenable to further structural and biochemical analyses of chromatin derived from virtually any genomic locus in yeast.

著者スポットライト:高濃縮遺伝子座特異的クロマチン単離プロトコルによるクロマチン研究の進展と制限の克服(英語) 

This protocol presents a locus-specific chromatin isolation method based on site-specific recombination to purify a single-copy gene locus of interest in its native chromatin context from budding yeast, Saccharomyces cerevisiae.

出芽酵母(Saccharomyces cerevisiae)におけるシングルコピー遺伝子座クロマチン精製

The basic organizational unit of eukaryotic chromatin is the nucleosome core particle (NCP), which comprises DNA wrapped ~1.7 times around a histone ...

ターゲットを絞りました

要約

さらに動画を探す

この動画の章

でヒストンminiSOGを使用した光遺伝学ランダム突然変異誘発

酵母からヒストン修飾のクロマチン免疫沈降 (チップ)

分裂酵母におけるプロテアソーム変異体のヘテロクロマチン不安定を選択するランダムな変異を遺伝子をターゲットとしました。

単一分子蛍光In-situハイブリダイゼーション (smFISH) における出芽酵母の栄養増殖と減数分裂

酵母神経変性認知症予備モデルにおけるヒストン翻訳後修飾変化の特性

分裂酵母分裂酵母のディープシーケンスアシスト、自発的な抑制画面

人間のDNA修復タンパク質の遺伝的研究は、モデルシステムとして酵母を使用

出芽酵母(Saccharomyces cerevisiae)におけるシングルコピー遺伝子座クロマチン精製

出芽酵母(Saccharomyces cerevisiae)におけるシングルコピー遺伝子座クロマチン精製

出芽酵母(Saccharomyces cerevisiae)におけるシングルコピー遺伝子座クロマチン精製

ターゲットを絞りました

要約

さらに動画を探す

この動画の章

でヒストンminiSOGを使用した光遺伝学ランダム突然変異誘発

酵母からヒストン修飾のクロマチン免疫沈降 (チップ)

分裂酵母におけるプロテアソーム変異体のヘテロクロマチン不安定を選択するランダムな変異を遺伝子をターゲットとしました。

単一分子蛍光In-situハイブリダイゼーション (smFISH) における出芽酵母の栄養増殖と減数分裂

酵母神経変性認知症予備モデルにおけるヒストン翻訳後修飾変化の特性

分裂酵母分裂酵母のディープ シーケンス アシスト、自発的な抑制画面

人間のDNA修復タンパク質の遺伝的研究は、モデルシステムとして酵母を使用

出芽酵母(Saccharomyces cerevisiae)におけるシングルコピー遺伝子座クロマチン精製

出芽酵母(Saccharomyces cerevisiae)におけるシングルコピー遺伝子座クロマチン精製

出芽酵母(Saccharomyces cerevisiae)におけるシングルコピー遺伝子座クロマチン精製

分裂酵母分裂酵母のディープシーケンスアシスト、自発的な抑制画面