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Allosteric Proteins-ATCase01:19

Allosteric Proteins-ATCase

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Binding sites linkages can regulate a protein's function.  For example, enzyme activity is often regulated through a feedback mechanism where the end product of the biochemical process serves as an inhibitor.
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to  N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis...
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Actin is a family of globular proteins that are highly abundant in eukaryotic cells. It makes up approximately 1-5% of total cell protein concentration. Actin monomers polymerize to form a complex network of polarized filaments, the actin cytoskeleton, that plays a crucial role in many cellular processes, including cell motility, division, endocytosis, and metastasis of cancer cells.
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Single Nucleotide Polymorphisms-SNPs01:05

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A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
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Actin is a highly conserved cytoskeletal protein found abundantly in eukaryotic cells. It constitutes 10% weight of the total cellular protein in muscle cells, while in non-muscle cells, it is lower and makes up around 1–5 percent of the total cell protein. Actin found in the unicellular amoebae and complex multicellular animals is around 80% similar, demonstrating their conservation over a billion years of evolution.  Actin coding genes are conserved within species and across...
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Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
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ACTN3 R577X (rs1815739) ポリモルフィズムとアスリートステータス:追加のケース・コントロール・アソシエーション研究とメタ分析

Ameni Chelly1, Amal Bouzid1,2, Ines Kammoun3

  • 1Laboratory of Molecular and Cellular Screening Processes, Centre of Biotechnology of Sfax, University of Sfax, Sfax, Tunisia.

Journal of strength and conditioning research
|August 22, 2025
PubMed
まとめ
この要約は機械生成です。

ACTN3 R577X遺伝子の変異体 (rs1815739) は耐久性との関連はなく,運動能力の低下と混合的なパフォーマンスに関連している. CC遺伝子型を持つチュニジアの選手は,より優れたパワー能力を示しました.

キーワード:
SNP について遺伝子パフォーマンスパワー

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科学分野:

  • スポーツ科学
  • 人間 の 遺伝子
  • 運動 生理学

背景:

  • アルファ-アクチニン-3 (ACTN3) R577Xポリモルフィズム (rs1815739) は運動能力に関与しているが,結果は矛盾している.
  • 以前の研究では,ACTN3の遺伝子型と力/耐久性の能力との関連が示唆されているが,決定的な証拠は不足している.
  • 北アフリカのスポーツ選手,特にチュニジア人のACTN3 R577Xポリモルフィズムに関する遺伝データは確立されていません.

研究 の 目的:

  • ACTN3 R577Xポリモルフィズムと運動状態の関連性に関するメタ分析を行う.
  • ACTN3 R577Xポリモルフィズムとチュニジアの選手の運動能力との関連を調査する.
  • ACTN3 R577Xのパワー,混合,耐久性における役割を明らかにする.

主な方法:

  • PubMed,Web of Science,およびScopusからのデータを用いて,90件の適格な研究 (16,439人のアスリート,36,349人の対照群) の包括的なメタ分析が行われました.
  • 49人のチュニジア人スポーツ選手 (32人のパワー選手,17人のミックス選手) と49人のコントロール選手を対象にケース・コントロール関連研究が行われました.
  • 遺伝子型決定は,ポリメラーゼ連鎖反応制限断片長ポリモルフィズム (PCR-RFLP) 分析を用いて行われました.

主要な成果:

  • メタアナリシスでは,ACTN3 rs1815739のポリモルフィズムと耐久性 (OR = 0. 95; 95% CI [0. 86- 1. 04]) の間に有意な関連性が見つかりませんでした.
  • Tアレルを持つアスリートは,より低いパワー (OR = 0. 71; 95% CI [0. 65- 0. 79]) と混合性能 (OR = 0. 95; 95% CI [0. 87-1. 02]) と著しく関連していました.
  • CC遺伝子型を持つチュニジアの選手は,より優れたパワーパフォーマンスを示す可能性が高い (OR = 0.71,95%CI [0.5353-0.9373]).

結論:

  • この研究は,ACTN3 rs1815739のポリモルフィズムと電力性能との関連性を裏付けるさらなる証拠を提供します.
  • この発見は,ACTN3 R577Xのポリモルフィズムが,パワースポーツとミックス競技の選手を区別する潜在的役割を強調しています.
  • この研究は,ACTN3 rs1815739のポリモルフィズムとチュニジアの北アフリカ人アスリートのパワーパフォーマンスとの関係を初めて確立したものです.