炭水化物応答配列結合タンパク質

MLXIPL
PDBに登録されている構造
PDBオルソログ検索: RCSB PDBe PDBj
PDBのIDコード一覧

4GNT

識別子
記号MLXIPL, CHREBP, MIO, MONDOB, WBSCR14, WS-bHLH, bHLHd14, MLX interacting protein like, MLX
外部IDOMIM: 605678 MGI: 1927999 HomoloGene: 32507 GeneCards: MLXIPL
遺伝子の位置 (ヒト)
7番染色体 (ヒト)
染色体7番染色体 (ヒト)[1]
7番染色体 (ヒト)
MLXIPL遺伝子の位置
MLXIPL遺伝子の位置
バンドデータ無し開始点73,593,194 bp[1]
終点73,624,543 bp[1]
遺伝子の位置 (マウス)
5番染色体 (マウス)
染色体5番染色体 (マウス)[2]
5番染色体 (マウス)
MLXIPL遺伝子の位置
MLXIPL遺伝子の位置
バンドデータ無し開始点135,118,744 bp[2]
終点135,167,236 bp[2]
RNA発現パターン
さらなる参照発現データ
遺伝子オントロジー
分子機能 carbohydrate response element binding
DNA結合
protein dimerization activity
protein homodimerization activity
DNA-binding transcription factor activity
転写因子結合
RNA polymerase II cis-regulatory region sequence-specific DNA binding
DNA-binding transcription repressor activity, RNA polymerase II-specific
protein heterodimerization activity
DNA-binding transcription factor activity, RNA polymerase II-specific
細胞の構成要素 transcription regulator complex
核質
細胞核
細胞質
細胞質基質
生物学的プロセス intracellular signal transduction
positive regulation of lipid biosynthetic process
regulation of transcription, DNA-templated
glucose homeostasis
regulation of transcription by RNA polymerase II
解剖学的構造の形態形成
negative regulation of transcription by RNA polymerase II
positive regulation of fatty acid biosynthetic process
transcription, DNA-templated
positive regulation of transcription, DNA-templated
fatty acid homeostasis
positive regulation of cell population proliferation
negative regulation of peptidyl-serine phosphorylation
glucose mediated signaling pathway
negative regulation of oxidative phosphorylation
negative regulation of transcription, DNA-templated
positive regulation of glycolytic process
triglyceride homeostasis
positive regulation of transcription by RNA polymerase II
cellular response to carbohydrate stimulus
energy homeostasis
出典:Amigo / QuickGO
オルソログ
ヒトマウス
Entrez
Ensembl
UniProt
RefSeq
(mRNA)

NM_032951
NM_032952
NM_032953
NM_032954
NM_032994

NM_021455
NM_001359237

RefSeq
(タンパク質)

NP_116569
NP_116570
NP_116571
NP_116572

NP_067430
NP_001346166

場所
(UCSC)
Chr 7: 73.59 – 73.62 MbChr 7: 135.12 – 135.17 Mb
PubMed検索[3][4]
ウィキデータ
閲覧/編集 ヒト閲覧/編集 マウス

炭水化物応答領域結合タンパク質(たんすいかぶつはんのうせいりょういきけつごうタンパクしつ、Carbohydrate-responsive element-binding protein、略称: ChREBP)は、ヒトにおいてMLXIPL遺伝子にコードされているタンパク質である[5][6]MLX-interacting protein-like (MLXIPL) としても知られている。名称はこのタンパク質がDNAの炭水化物応答領域配列と相互作用することに由来する。

機能

この遺伝子は、Myc / Max / Madスーパーファミリーの塩基性ヘリックス-ループ-ヘリックスロイシンジッパー転写因子をコードしている。このタンパク質はヘテロ二量体複合体を形成し、グルコース依存的にトリグリセリド合成遺伝子のプロモーターに存在する炭水化物応答配列 (ChoRE) モチーフに結合して活性化させる[6]

臨床的重要性

この遺伝子は7番染色体7q11.23の遺伝子欠失が原因の多系統発達障害であるウィリアムズ症候群において欠失している[6]

相互作用

MLXIPLはMLXと相互作用することが明らかとされている[7]

解糖系における役割

ChREBPは、へ移行しPP2Aによってp-Serおよびp-Thrが脱リン酸化された後にDNAに結合する。PP2A自身はキシルロース-5-リン酸によって活性化される[8]。Xu5Pはグルコース-6-リン酸の濃度が高い(細胞が十分なグルコースを持っている)場合にペントースリン酸経路で作られる。肝臓では、ChREBPはL型ピルビン酸キナーゼ (L-PK) や、アセチルCoAカルボキシラーゼ、脂肪酸合成酵素を含む解糖系や脂質生合成のいくつかの調節遺伝子の活性化を媒介する。

脚注

  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000009950 - Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000005373 - Ensembl, May 2017
  3. ^ Human PubMed Reference:
  4. ^ Mouse PubMed Reference:
  5. ^ Meng X, Lu X, Li Z, Green ED, Massa H, Trask BJ, Morris CA, Keating MT (Jan 1999). “Complete physical map of the common deletion region in Williams syndrome and identification and characterization of three novel genes”. Hum Genet 103 (5): 590–9. doi:10.1007/s004390050874. PMID 9860302. 
  6. ^ a b c Entrez Gene: MLXIPL MLX interacting protein-like”. 2013年10月25日閲覧。
  7. ^ Cairo S, Merla G, Urbinati F, Ballabio A, Reymond A (March 2001). “WBSCR14, a gene mapping to the Williams--Beuren syndrome deleted region, is a new member of the Mlx transcription factor network”. Hum. Mol. Genet. 10 (6): 617–27. doi:10.1093/hmg/10.6.617. PMID 11230181. 
  8. ^ Kabashima T, Kawaguchi T, Wadzinski BE, Uyeda K (2003). “Xylulose 5-phosphate mediates glucose-induced lipogenesis by xylulose 5-phosphate-activated protein phosphatase in rat liver”. Proc. Natl. Acad. Sci. U S A 100 (9): 5107-5112. doi:10.1073/pnas.0730817100. PMC 154306. PMID 12684532. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC154306/. 

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