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データを開く
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基本情報
登録情報 | データベース: PDB / ID: 4mth | ||||||
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タイトル | Crystal structure of mature human RegIIIalpha | ||||||
![]() | Regenerating islet-derived protein 3-alpha 15 kDa form | ||||||
![]() | ANTIMICROBIAL PROTEIN / HIP/PAP / REGIII-GAMMA / C-TYPE LECTIN | ||||||
機能・相同性 | ![]() positive regulation of detection of glucose / response to symbiotic bacterium / positive regulation of keratinocyte proliferation / negative regulation of keratinocyte differentiation / negative regulation of inflammatory response to wounding / oligosaccharide binding / peptidoglycan binding / heterophilic cell-cell adhesion via plasma membrane cell adhesion molecules / Antimicrobial peptides / positive regulation of wound healing ...positive regulation of detection of glucose / response to symbiotic bacterium / positive regulation of keratinocyte proliferation / negative regulation of keratinocyte differentiation / negative regulation of inflammatory response to wounding / oligosaccharide binding / peptidoglycan binding / heterophilic cell-cell adhesion via plasma membrane cell adhesion molecules / Antimicrobial peptides / positive regulation of wound healing / acute-phase response / hormone activity / response to peptide hormone / response to wounding / antimicrobial humoral immune response mediated by antimicrobial peptide / signaling receptor activity / carbohydrate binding / positive regulation of cell population proliferation / extracellular space / extracellular region / identical protein binding / cytoplasm 類似検索 - 分子機能 | ||||||
生物種 | ![]() | ||||||
手法 | ![]() ![]() ![]() | ||||||
![]() | Derebe, M.G. | ||||||
![]() | ![]() タイトル: Antibacterial membrane attack by a pore-forming intestinal C-type lectin. 著者: Sohini Mukherjee / Hui Zheng / Mehabaw G Derebe / Keith M Callenberg / Carrie L Partch / Darcy Rollins / Daniel C Propheter / Josep Rizo / Michael Grabe / Qiu-Xing Jiang / Lora V Hooper / ![]() 要旨: Human body-surface epithelia coexist in close association with complex bacterial communities and are protected by a variety of antibacterial proteins. C-type lectins of the RegIII family are ...Human body-surface epithelia coexist in close association with complex bacterial communities and are protected by a variety of antibacterial proteins. C-type lectins of the RegIII family are bactericidal proteins that limit direct contact between bacteria and the intestinal epithelium and thus promote tolerance to the intestinal microbiota. RegIII lectins recognize their bacterial targets by binding peptidoglycan carbohydrate, but the mechanism by which they kill bacteria is unknown. Here we elucidate the mechanistic basis for RegIII bactericidal activity. We show that human RegIIIα (also known as HIP/PAP) binds membrane phospholipids and kills bacteria by forming a hexameric membrane-permeabilizing oligomeric pore. We derive a three-dimensional model of the RegIIIα pore by docking the RegIIIα crystal structure into a cryo-electron microscopic map of the pore complex, and show that the model accords with experimentally determined properties of the pore. Lipopolysaccharide inhibits RegIIIα pore-forming activity, explaining why RegIIIα is bactericidal for Gram-positive but not Gram-negative bacteria. Our findings identify C-type lectins as mediators of membrane attack in the mucosal immune system, and provide detailed insight into an antibacterial mechanism that promotes mutualism with the resident microbiota. | ||||||
履歴 |
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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ダウンロードとリンク
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PDBx/mmCIF形式 | ![]() | 46.4 KB | 表示 | ![]() |
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PDB形式 | ![]() | 31.1 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
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アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
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リンク
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集合体
登録構造単位 | ![]()
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単位格子 |
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要素
#1: タンパク質 | 分子量: 15420.242 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() | ||||
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#2: 化合物 | #3: 水 | ChemComp-HOH / | Has protein modification | Y | |
-実験情報
-実験
実験 | 手法: ![]() |
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試料調製
結晶 | マシュー密度: 2.28 Å3/Da / 溶媒含有率: 45.96 % |
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結晶化 | 温度: 293 K / 手法: 蒸気拡散法, ハンギングドロップ法 / pH: 6 詳細: 22% PEG 8000, 0.1M MES pH 6.0, 0.1M NACL, 10MM NAAC, 5% GLYCEROL, VAPOR DIFFUSION, HANGING DROP, temperature 293K |
-データ収集
回折 | 平均測定温度: 100 K |
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放射光源 | 由来: ![]() ![]() ![]() |
検出器 | タイプ: ADSC QUANTUM 315r / 検出器: CCD / 日付: 2010年11月19日 |
放射 | プロトコル: SINGLE WAVELENGTH / 単色(M)・ラウエ(L): M / 散乱光タイプ: x-ray |
放射波長 | 波長: 1.54 Å / 相対比: 1 |
反射 | 解像度: 1.47→50 Å / Num. all: 24610 / Num. obs: 24610 / Biso Wilson estimate: 15.08 Å2 / Net I/σ(I): 2.3 |
-位相決定
位相決定 | 手法: ![]() |
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解析
ソフトウェア |
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精密化 | 構造決定の手法: ![]()
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溶媒の処理 | 減衰半径: 0.9 Å / VDWプローブ半径: 1.11 Å / 溶媒モデル: FLAT BULK SOLVENT MODEL / Bsol: 60.14 Å2 / ksol: 0.4 e/Å3 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
原子変位パラメータ | Biso max: 58.44 Å2 / Biso mean: 20.7654 Å2 / Biso min: 7.97 Å2
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精密化ステップ | サイクル: LAST / 解像度: 1.47→26.13 Å
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拘束条件 |
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LS精密化 シェル | Refine-ID: X-RAY DIFFRACTION / Total num. of bins used: 10
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